mirror of
https://github.com/smaeul/u-boot.git
synced 2025-11-03 21:48:15 +00:00
c3cf134a41
This is done so that the device path protocol interface of the network device can be changed internally by u-boot when a new bootfile gets downloaded. Signed-off-by: Adriano Cordova <adriano.cordova@canonical.com> Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
4037 lines
109 KiB
C
4037 lines
109 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* EFI application boot time services
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*
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* Copyright (c) 2016 Alexander Graf
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*/
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#include <bootm.h>
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#include <div64.h>
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#include <dm/device.h>
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#include <dm/root.h>
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#include <efi_loader.h>
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#include <irq_func.h>
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#include <log.h>
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#include <malloc.h>
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#include <pe.h>
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#include <time.h>
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#include <u-boot/crc.h>
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#include <usb.h>
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#include <watchdog.h>
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#include <asm/global_data.h>
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#include <asm/setjmp.h>
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#include <linux/libfdt_env.h>
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DECLARE_GLOBAL_DATA_PTR;
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/* Task priority level */
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static efi_uintn_t efi_tpl = TPL_APPLICATION;
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/* This list contains all the EFI objects our payload has access to */
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LIST_HEAD(efi_obj_list);
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/* List of all events */
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__efi_runtime_data LIST_HEAD(efi_events);
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/* List of queued events */
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static LIST_HEAD(efi_event_queue);
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/* Flag to disable timer activity in ExitBootServices() */
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static bool timers_enabled = true;
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/* Flag used by the selftest to avoid detaching devices in ExitBootServices() */
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bool efi_st_keep_devices;
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/* List of all events registered by RegisterProtocolNotify() */
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static LIST_HEAD(efi_register_notify_events);
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/* Handle of the currently executing image */
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static efi_handle_t current_image;
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#if defined(CONFIG_ARM) || defined(CONFIG_RISCV)
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/*
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* The "gd" pointer lives in a register on ARM and RISC-V that we declare
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* fixed when compiling U-Boot. However, the payload does not know about that
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* restriction so we need to manually swap its and our view of that register on
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* EFI callback entry/exit.
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*/
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static volatile gd_t *efi_gd, *app_gd;
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#endif
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static efi_status_t efi_uninstall_protocol
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(efi_handle_t handle, const efi_guid_t *protocol,
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void *protocol_interface, bool preserve);
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/* 1 if inside U-Boot code, 0 if inside EFI payload code */
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static int entry_count = 1;
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static int nesting_level;
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/* GUID of the device tree table */
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const efi_guid_t efi_guid_fdt = EFI_FDT_GUID;
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/* GUID of the EFI_DRIVER_BINDING_PROTOCOL */
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const efi_guid_t efi_guid_driver_binding_protocol =
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EFI_DRIVER_BINDING_PROTOCOL_GUID;
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/* event group ExitBootServices() invoked */
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const efi_guid_t efi_guid_event_group_exit_boot_services =
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EFI_EVENT_GROUP_EXIT_BOOT_SERVICES;
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/* event group before ExitBootServices() invoked */
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const efi_guid_t efi_guid_event_group_before_exit_boot_services =
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EFI_EVENT_GROUP_BEFORE_EXIT_BOOT_SERVICES;
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/* event group SetVirtualAddressMap() invoked */
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const efi_guid_t efi_guid_event_group_virtual_address_change =
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EFI_EVENT_GROUP_VIRTUAL_ADDRESS_CHANGE;
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/* event group memory map changed */
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const efi_guid_t efi_guid_event_group_memory_map_change =
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EFI_EVENT_GROUP_MEMORY_MAP_CHANGE;
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/* event group boot manager about to boot */
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const efi_guid_t efi_guid_event_group_ready_to_boot =
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EFI_EVENT_GROUP_READY_TO_BOOT;
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/* event group ResetSystem() invoked (before ExitBootServices) */
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const efi_guid_t efi_guid_event_group_reset_system =
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EFI_EVENT_GROUP_RESET_SYSTEM;
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/* event group return to efibootmgr */
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const efi_guid_t efi_guid_event_group_return_to_efibootmgr =
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EFI_EVENT_GROUP_RETURN_TO_EFIBOOTMGR;
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/* GUIDs of the Load File and Load File2 protocols */
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const efi_guid_t efi_guid_load_file_protocol = EFI_LOAD_FILE_PROTOCOL_GUID;
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const efi_guid_t efi_guid_load_file2_protocol = EFI_LOAD_FILE2_PROTOCOL_GUID;
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/* GUID of the SMBIOS table */
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const efi_guid_t smbios_guid = SMBIOS_TABLE_GUID;
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static efi_status_t EFIAPI efi_disconnect_controller(
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efi_handle_t controller_handle,
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efi_handle_t driver_image_handle,
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efi_handle_t child_handle);
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static
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efi_status_t EFIAPI efi_connect_controller(efi_handle_t controller_handle,
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efi_handle_t *driver_image_handle,
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struct efi_device_path *remain_device_path,
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bool recursive);
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/* Called on every callback entry */
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int __efi_entry_check(void)
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{
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int ret = entry_count++ == 0;
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#if defined(CONFIG_ARM) || defined(CONFIG_RISCV)
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assert(efi_gd);
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app_gd = gd;
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set_gd(efi_gd);
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#endif
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return ret;
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}
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/* Called on every callback exit */
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int __efi_exit_check(void)
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{
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int ret = --entry_count == 0;
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#if defined(CONFIG_ARM) || defined(CONFIG_RISCV)
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set_gd(app_gd);
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#endif
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return ret;
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}
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/**
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* efi_save_gd() - save global data register
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*
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* On the ARM and RISC-V architectures gd is mapped to a fixed register.
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* As this register may be overwritten by an EFI payload we save it here
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* and restore it on every callback entered.
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*
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* This function is called after relocation from initr_reloc_global_data().
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*/
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void efi_save_gd(void)
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{
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#if defined(CONFIG_ARM) || defined(CONFIG_RISCV)
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efi_gd = gd;
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#endif
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}
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/**
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* efi_restore_gd() - restore global data register
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*
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* On the ARM and RISC-V architectures gd is mapped to a fixed register.
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* Restore it after returning from the UEFI world to the value saved via
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* efi_save_gd().
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*/
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void efi_restore_gd(void)
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{
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#if defined(CONFIG_ARM) || defined(CONFIG_RISCV)
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/* Only restore if we're already in EFI context */
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if (!efi_gd)
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return;
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set_gd(efi_gd);
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#endif
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}
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/**
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* indent_string() - returns a string for indenting with two spaces per level
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* @level: indent level
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*
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* A maximum of ten indent levels is supported. Higher indent levels will be
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* truncated.
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*
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* Return: A string for indenting with two spaces per level is
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* returned.
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*/
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static const char *indent_string(int level)
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{
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const char *indent = " ";
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const int max = strlen(indent);
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level = min(max, level * 2);
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return &indent[max - level];
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}
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const char *__efi_nesting(void)
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{
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return indent_string(nesting_level);
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}
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const char *__efi_nesting_inc(void)
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{
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return indent_string(nesting_level++);
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}
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const char *__efi_nesting_dec(void)
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{
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return indent_string(--nesting_level);
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}
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/**
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* efi_event_is_queued() - check if an event is queued
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*
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* @event: event
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* Return: true if event is queued
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*/
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static bool efi_event_is_queued(struct efi_event *event)
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{
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return !!event->queue_link.next;
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}
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/**
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* efi_purge_handle() - Clean the deleted handle from the various lists
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* @handle: handle to remove
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*
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* Return: status code
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*/
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static efi_status_t efi_purge_handle(efi_handle_t handle)
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{
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struct efi_register_notify_event *item;
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if (!list_empty(&handle->protocols))
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return EFI_ACCESS_DENIED;
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/* The handle is about to be freed. Remove it from events */
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list_for_each_entry(item, &efi_register_notify_events, link) {
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struct efi_protocol_notification *hitem, *hnext;
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list_for_each_entry_safe(hitem, hnext, &item->handles, link) {
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if (handle == hitem->handle) {
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list_del(&hitem->link);
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free(hitem);
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}
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}
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}
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/* The last protocol has been removed, delete the handle. */
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list_del(&handle->link);
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free(handle);
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return EFI_SUCCESS;
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}
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/**
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* efi_process_event_queue() - process event queue
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*/
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static void efi_process_event_queue(void)
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{
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while (!list_empty(&efi_event_queue)) {
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struct efi_event *event;
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efi_uintn_t old_tpl;
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event = list_first_entry(&efi_event_queue, struct efi_event,
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queue_link);
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if (efi_tpl >= event->notify_tpl)
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return;
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list_del(&event->queue_link);
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event->queue_link.next = NULL;
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event->queue_link.prev = NULL;
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/* Events must be executed at the event's TPL */
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old_tpl = efi_tpl;
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efi_tpl = event->notify_tpl;
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EFI_CALL_VOID(event->notify_function(event,
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event->notify_context));
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efi_tpl = old_tpl;
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if (event->type == EVT_NOTIFY_SIGNAL)
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event->is_signaled = 0;
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}
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}
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/**
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* efi_queue_event() - queue an EFI event
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* @event: event to signal
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*
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* This function queues the notification function of the event for future
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* execution.
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*
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*/
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static void efi_queue_event(struct efi_event *event)
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{
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struct efi_event *item;
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if (!event->notify_function)
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return;
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if (!efi_event_is_queued(event)) {
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/*
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* Events must be notified in order of decreasing task priority
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* level. Insert the new event accordingly.
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*/
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list_for_each_entry(item, &efi_event_queue, queue_link) {
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if (item->notify_tpl < event->notify_tpl) {
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list_add_tail(&event->queue_link,
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&item->queue_link);
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event = NULL;
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break;
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}
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}
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if (event)
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list_add_tail(&event->queue_link, &efi_event_queue);
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efi_process_event_queue();
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}
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}
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/**
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* is_valid_tpl() - check if the task priority level is valid
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*
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* @tpl: TPL level to check
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* Return: status code
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*/
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static efi_status_t is_valid_tpl(efi_uintn_t tpl)
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{
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switch (tpl) {
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case TPL_APPLICATION:
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case TPL_CALLBACK:
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case TPL_NOTIFY:
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return EFI_SUCCESS;
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default:
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return EFI_INVALID_PARAMETER;
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}
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}
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/**
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* efi_signal_event() - signal an EFI event
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* @event: event to signal
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*
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* This function signals an event. If the event belongs to an event group, all
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* events of the group are signaled. If they are of type EVT_NOTIFY_SIGNAL,
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* their notification function is queued.
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*
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* For the SignalEvent service see efi_signal_event_ext.
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*/
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void efi_signal_event(struct efi_event *event)
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{
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if (event->is_signaled)
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return;
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if (event->group) {
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struct efi_event *evt;
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/*
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* The signaled state has to set before executing any
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* notification function
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*/
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list_for_each_entry(evt, &efi_events, link) {
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if (!evt->group || guidcmp(evt->group, event->group))
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continue;
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if (evt->is_signaled)
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continue;
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evt->is_signaled = true;
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}
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list_for_each_entry(evt, &efi_events, link) {
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if (!evt->group || guidcmp(evt->group, event->group))
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continue;
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efi_queue_event(evt);
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}
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} else {
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event->is_signaled = true;
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efi_queue_event(event);
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}
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}
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/**
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* efi_raise_tpl() - raise the task priority level
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* @new_tpl: new value of the task priority level
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*
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* This function implements the RaiseTpl service.
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*
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* See the Unified Extensible Firmware Interface (UEFI) specification for
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* details.
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*
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* Return: old value of the task priority level
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*/
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static unsigned long EFIAPI efi_raise_tpl(efi_uintn_t new_tpl)
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{
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efi_uintn_t old_tpl = efi_tpl;
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EFI_ENTRY("0x%zx", new_tpl);
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if (new_tpl < efi_tpl)
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EFI_PRINT("WARNING: new_tpl < current_tpl in %s\n", __func__);
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efi_tpl = new_tpl;
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if (efi_tpl > TPL_HIGH_LEVEL)
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efi_tpl = TPL_HIGH_LEVEL;
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EFI_EXIT(EFI_SUCCESS);
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return old_tpl;
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}
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/**
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* efi_restore_tpl() - lower the task priority level
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* @old_tpl: value of the task priority level to be restored
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*
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* This function implements the RestoreTpl service.
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*
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* See the Unified Extensible Firmware Interface (UEFI) specification for
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* details.
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*/
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static void EFIAPI efi_restore_tpl(efi_uintn_t old_tpl)
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{
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EFI_ENTRY("0x%zx", old_tpl);
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if (old_tpl > efi_tpl)
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EFI_PRINT("WARNING: old_tpl > current_tpl in %s\n", __func__);
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efi_tpl = old_tpl;
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if (efi_tpl > TPL_HIGH_LEVEL)
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efi_tpl = TPL_HIGH_LEVEL;
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/*
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* Lowering the TPL may have made queued events eligible for execution.
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*/
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efi_timer_check();
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EFI_EXIT(EFI_SUCCESS);
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}
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/**
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* efi_allocate_pages_ext() - allocate memory pages
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* @type: type of allocation to be performed
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* @memory_type: usage type of the allocated memory
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* @pages: number of pages to be allocated
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* @memory: allocated memory
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*
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* This function implements the AllocatePages service.
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*
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* See the Unified Extensible Firmware Interface (UEFI) specification for
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* details.
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*
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* Return: status code
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*/
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static efi_status_t EFIAPI efi_allocate_pages_ext(int type, int memory_type,
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efi_uintn_t pages,
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uint64_t *memory)
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{
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efi_status_t r;
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EFI_ENTRY("%d, %d, 0x%zx, %p", type, memory_type, pages, memory);
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r = efi_allocate_pages(type, memory_type, pages, memory);
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return EFI_EXIT(r);
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}
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/**
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* efi_free_pages_ext() - Free memory pages.
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* @memory: start of the memory area to be freed
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* @pages: number of pages to be freed
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*
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* This function implements the FreePages service.
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*
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* See the Unified Extensible Firmware Interface (UEFI) specification for
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* details.
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*
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* Return: status code
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*/
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static efi_status_t EFIAPI efi_free_pages_ext(uint64_t memory,
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efi_uintn_t pages)
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{
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efi_status_t r;
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EFI_ENTRY("%llx, 0x%zx", memory, pages);
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r = efi_free_pages(memory, pages);
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return EFI_EXIT(r);
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}
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/**
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* efi_get_memory_map_ext() - get map describing memory usage
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* @memory_map_size: on entry the size, in bytes, of the memory map buffer,
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* on exit the size of the copied memory map
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* @memory_map: buffer to which the memory map is written
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* @map_key: key for the memory map
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* @descriptor_size: size of an individual memory descriptor
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* @descriptor_version: version number of the memory descriptor structure
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*
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* This function implements the GetMemoryMap service.
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*
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* See the Unified Extensible Firmware Interface (UEFI) specification for
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* details.
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*
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* Return: status code
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*/
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static efi_status_t EFIAPI efi_get_memory_map_ext(
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efi_uintn_t *memory_map_size,
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struct efi_mem_desc *memory_map,
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efi_uintn_t *map_key,
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efi_uintn_t *descriptor_size,
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uint32_t *descriptor_version)
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{
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efi_status_t r;
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EFI_ENTRY("%p, %p, %p, %p, %p", memory_map_size, memory_map,
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map_key, descriptor_size, descriptor_version);
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r = efi_get_memory_map(memory_map_size, memory_map, map_key,
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descriptor_size, descriptor_version);
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return EFI_EXIT(r);
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}
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/**
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* efi_allocate_pool_ext() - allocate memory from pool
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* @pool_type: type of the pool from which memory is to be allocated
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* @size: number of bytes to be allocated
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* @buffer: allocated memory
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*
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* This function implements the AllocatePool service.
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*
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* See the Unified Extensible Firmware Interface (UEFI) specification for
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* details.
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|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t EFIAPI efi_allocate_pool_ext(int pool_type,
|
|
efi_uintn_t size,
|
|
void **buffer)
|
|
{
|
|
efi_status_t r;
|
|
|
|
EFI_ENTRY("%d, %zu, %p", pool_type, size, buffer);
|
|
r = efi_allocate_pool(pool_type, size, buffer);
|
|
return EFI_EXIT(r);
|
|
}
|
|
|
|
/**
|
|
* efi_free_pool_ext() - free memory from pool
|
|
* @buffer: start of memory to be freed
|
|
*
|
|
* This function implements the FreePool service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t EFIAPI efi_free_pool_ext(void *buffer)
|
|
{
|
|
efi_status_t r;
|
|
|
|
EFI_ENTRY("%p", buffer);
|
|
r = efi_free_pool(buffer);
|
|
return EFI_EXIT(r);
|
|
}
|
|
|
|
/**
|
|
* efi_add_handle() - add a new handle to the object list
|
|
*
|
|
* @handle: handle to be added
|
|
*
|
|
* The protocols list is initialized. The handle is added to the list of known
|
|
* UEFI objects.
|
|
*/
|
|
void efi_add_handle(efi_handle_t handle)
|
|
{
|
|
if (!handle)
|
|
return;
|
|
INIT_LIST_HEAD(&handle->protocols);
|
|
list_add_tail(&handle->link, &efi_obj_list);
|
|
}
|
|
|
|
/**
|
|
* efi_create_handle() - create handle
|
|
* @handle: new handle
|
|
*
|
|
* Return: status code
|
|
*/
|
|
efi_status_t efi_create_handle(efi_handle_t *handle)
|
|
{
|
|
struct efi_object *obj;
|
|
|
|
obj = calloc(1, sizeof(struct efi_object));
|
|
if (!obj)
|
|
return EFI_OUT_OF_RESOURCES;
|
|
|
|
efi_add_handle(obj);
|
|
*handle = obj;
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* efi_search_protocol() - find a protocol on a handle.
|
|
* @handle: handle
|
|
* @protocol_guid: GUID of the protocol
|
|
* @handler: reference to the protocol
|
|
*
|
|
* Return: status code
|
|
*/
|
|
efi_status_t efi_search_protocol(const efi_handle_t handle,
|
|
const efi_guid_t *protocol_guid,
|
|
struct efi_handler **handler)
|
|
{
|
|
struct efi_object *efiobj;
|
|
struct list_head *lhandle;
|
|
|
|
if (!handle || !protocol_guid)
|
|
return EFI_INVALID_PARAMETER;
|
|
efiobj = efi_search_obj(handle);
|
|
if (!efiobj)
|
|
return EFI_INVALID_PARAMETER;
|
|
list_for_each(lhandle, &efiobj->protocols) {
|
|
struct efi_handler *protocol;
|
|
|
|
protocol = list_entry(lhandle, struct efi_handler, link);
|
|
if (!guidcmp(&protocol->guid, protocol_guid)) {
|
|
if (handler)
|
|
*handler = protocol;
|
|
return EFI_SUCCESS;
|
|
}
|
|
}
|
|
return EFI_NOT_FOUND;
|
|
}
|
|
|
|
/**
|
|
* efi_remove_protocol() - delete protocol from a handle
|
|
* @handle: handle from which the protocol shall be deleted
|
|
* @protocol: GUID of the protocol to be deleted
|
|
* @protocol_interface: interface of the protocol implementation
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t efi_remove_protocol(const efi_handle_t handle,
|
|
const efi_guid_t *protocol,
|
|
void *protocol_interface)
|
|
{
|
|
struct efi_handler *handler;
|
|
efi_status_t ret;
|
|
|
|
ret = efi_search_protocol(handle, protocol, &handler);
|
|
if (ret != EFI_SUCCESS)
|
|
return ret;
|
|
if (handler->protocol_interface != protocol_interface)
|
|
return EFI_NOT_FOUND;
|
|
list_del(&handler->link);
|
|
free(handler);
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* efi_remove_all_protocols() - delete all protocols from a handle
|
|
* @handle: handle from which the protocols shall be deleted
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t efi_remove_all_protocols(const efi_handle_t handle)
|
|
{
|
|
struct efi_object *efiobj;
|
|
struct efi_handler *protocol;
|
|
struct efi_handler *pos;
|
|
|
|
efiobj = efi_search_obj(handle);
|
|
if (!efiobj)
|
|
return EFI_INVALID_PARAMETER;
|
|
list_for_each_entry_safe(protocol, pos, &efiobj->protocols, link) {
|
|
efi_status_t ret;
|
|
|
|
ret = efi_uninstall_protocol(handle, &protocol->guid,
|
|
protocol->protocol_interface, true);
|
|
if (ret != EFI_SUCCESS)
|
|
return ret;
|
|
}
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* efi_delete_handle() - delete handle
|
|
*
|
|
* @handle: handle to delete
|
|
*
|
|
* Return: status code
|
|
*/
|
|
efi_status_t efi_delete_handle(efi_handle_t handle)
|
|
{
|
|
efi_status_t ret;
|
|
|
|
ret = efi_remove_all_protocols(handle);
|
|
if (ret != EFI_SUCCESS) {
|
|
log_err("Handle %p has protocols installed. Unable to delete\n", handle);
|
|
return ret;
|
|
}
|
|
|
|
return efi_purge_handle(handle);
|
|
}
|
|
|
|
/**
|
|
* efi_is_event() - check if a pointer is a valid event
|
|
* @event: pointer to check
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t efi_is_event(const struct efi_event *event)
|
|
{
|
|
const struct efi_event *evt;
|
|
|
|
if (!event)
|
|
return EFI_INVALID_PARAMETER;
|
|
list_for_each_entry(evt, &efi_events, link) {
|
|
if (evt == event)
|
|
return EFI_SUCCESS;
|
|
}
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
/**
|
|
* efi_create_event() - create an event
|
|
*
|
|
* @type: type of the event to create
|
|
* @notify_tpl: task priority level of the event
|
|
* @notify_function: notification function of the event
|
|
* @notify_context: pointer passed to the notification function
|
|
* @group: event group
|
|
* @event: created event
|
|
*
|
|
* This function is used inside U-Boot code to create an event.
|
|
*
|
|
* For the API function implementing the CreateEvent service see
|
|
* efi_create_event_ext.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
efi_status_t efi_create_event(uint32_t type, efi_uintn_t notify_tpl,
|
|
void (EFIAPI *notify_function) (
|
|
struct efi_event *event,
|
|
void *context),
|
|
void *notify_context, const efi_guid_t *group,
|
|
struct efi_event **event)
|
|
{
|
|
struct efi_event *evt;
|
|
efi_status_t ret;
|
|
int pool_type;
|
|
|
|
if (event == NULL)
|
|
return EFI_INVALID_PARAMETER;
|
|
|
|
switch (type) {
|
|
case 0:
|
|
case EVT_TIMER:
|
|
case EVT_NOTIFY_SIGNAL:
|
|
case EVT_TIMER | EVT_NOTIFY_SIGNAL:
|
|
case EVT_NOTIFY_WAIT:
|
|
case EVT_TIMER | EVT_NOTIFY_WAIT:
|
|
case EVT_SIGNAL_EXIT_BOOT_SERVICES:
|
|
pool_type = EFI_BOOT_SERVICES_DATA;
|
|
break;
|
|
case EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE:
|
|
pool_type = EFI_RUNTIME_SERVICES_DATA;
|
|
break;
|
|
default:
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
/*
|
|
* The UEFI specification requires event notification levels to be
|
|
* > TPL_APPLICATION and <= TPL_HIGH_LEVEL.
|
|
*
|
|
* Parameter NotifyTpl should not be checked if it is not used.
|
|
*/
|
|
if ((type & (EVT_NOTIFY_WAIT | EVT_NOTIFY_SIGNAL)) &&
|
|
(!notify_function || is_valid_tpl(notify_tpl) != EFI_SUCCESS ||
|
|
notify_tpl == TPL_APPLICATION))
|
|
return EFI_INVALID_PARAMETER;
|
|
|
|
ret = efi_allocate_pool(pool_type, sizeof(struct efi_event),
|
|
(void **)&evt);
|
|
if (ret != EFI_SUCCESS)
|
|
return ret;
|
|
memset(evt, 0, sizeof(struct efi_event));
|
|
evt->type = type;
|
|
evt->notify_tpl = notify_tpl;
|
|
evt->notify_function = notify_function;
|
|
evt->notify_context = notify_context;
|
|
evt->group = group;
|
|
/* Disable timers on boot up */
|
|
evt->trigger_next = -1ULL;
|
|
list_add_tail(&evt->link, &efi_events);
|
|
*event = evt;
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
* efi_create_event_ex() - create an event in a group
|
|
*
|
|
* @type: type of the event to create
|
|
* @notify_tpl: task priority level of the event
|
|
* @notify_function: notification function of the event
|
|
* @notify_context: pointer passed to the notification function
|
|
* @event: created event
|
|
* @event_group: event group
|
|
*
|
|
* This function implements the CreateEventEx service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static
|
|
efi_status_t EFIAPI efi_create_event_ex(uint32_t type, efi_uintn_t notify_tpl,
|
|
void (EFIAPI *notify_function) (
|
|
struct efi_event *event,
|
|
void *context),
|
|
void *notify_context,
|
|
const efi_guid_t *event_group,
|
|
struct efi_event **event)
|
|
{
|
|
efi_status_t ret;
|
|
|
|
EFI_ENTRY("%d, 0x%zx, %p, %p, %pUs", type, notify_tpl, notify_function,
|
|
notify_context, event_group);
|
|
|
|
/*
|
|
* The allowable input parameters are the same as in CreateEvent()
|
|
* except for the following two disallowed event types.
|
|
*/
|
|
switch (type) {
|
|
case EVT_SIGNAL_EXIT_BOOT_SERVICES:
|
|
case EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE:
|
|
ret = EFI_INVALID_PARAMETER;
|
|
goto out;
|
|
}
|
|
|
|
ret = efi_create_event(type, notify_tpl, notify_function,
|
|
notify_context, event_group, event);
|
|
out:
|
|
return EFI_EXIT(ret);
|
|
}
|
|
|
|
/**
|
|
* efi_create_event_ext() - create an event
|
|
* @type: type of the event to create
|
|
* @notify_tpl: task priority level of the event
|
|
* @notify_function: notification function of the event
|
|
* @notify_context: pointer passed to the notification function
|
|
* @event: created event
|
|
*
|
|
* This function implements the CreateEvent service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t EFIAPI efi_create_event_ext(
|
|
uint32_t type, efi_uintn_t notify_tpl,
|
|
void (EFIAPI *notify_function) (
|
|
struct efi_event *event,
|
|
void *context),
|
|
void *notify_context, struct efi_event **event)
|
|
{
|
|
EFI_ENTRY("%d, 0x%zx, %p, %p", type, notify_tpl, notify_function,
|
|
notify_context);
|
|
return EFI_EXIT(efi_create_event(type, notify_tpl, notify_function,
|
|
notify_context, NULL, event));
|
|
}
|
|
|
|
/**
|
|
* efi_timer_check() - check if a timer event has occurred
|
|
*
|
|
* Check if a timer event has occurred or a queued notification function should
|
|
* be called.
|
|
*
|
|
* Our timers have to work without interrupts, so we check whenever keyboard
|
|
* input or disk accesses happen if enough time elapsed for them to fire.
|
|
*/
|
|
void efi_timer_check(void)
|
|
{
|
|
struct efi_event *evt;
|
|
u64 now = timer_get_us();
|
|
|
|
list_for_each_entry(evt, &efi_events, link) {
|
|
if (!timers_enabled)
|
|
continue;
|
|
if (!(evt->type & EVT_TIMER) || now < evt->trigger_next)
|
|
continue;
|
|
switch (evt->trigger_type) {
|
|
case EFI_TIMER_RELATIVE:
|
|
evt->trigger_type = EFI_TIMER_STOP;
|
|
break;
|
|
case EFI_TIMER_PERIODIC:
|
|
evt->trigger_next += evt->trigger_time;
|
|
break;
|
|
default:
|
|
continue;
|
|
}
|
|
evt->is_signaled = false;
|
|
efi_signal_event(evt);
|
|
}
|
|
efi_process_event_queue();
|
|
schedule();
|
|
}
|
|
|
|
/**
|
|
* efi_set_timer() - set the trigger time for a timer event or stop the event
|
|
* @event: event for which the timer is set
|
|
* @type: type of the timer
|
|
* @trigger_time: trigger period in multiples of 100 ns
|
|
*
|
|
* This is the function for internal usage in U-Boot. For the API function
|
|
* implementing the SetTimer service see efi_set_timer_ext.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
|
|
uint64_t trigger_time)
|
|
{
|
|
/* Check that the event is valid */
|
|
if (efi_is_event(event) != EFI_SUCCESS || !(event->type & EVT_TIMER))
|
|
return EFI_INVALID_PARAMETER;
|
|
|
|
/*
|
|
* The parameter defines a multiple of 100 ns.
|
|
* We use multiples of 1000 ns. So divide by 10.
|
|
*/
|
|
do_div(trigger_time, 10);
|
|
|
|
switch (type) {
|
|
case EFI_TIMER_STOP:
|
|
event->trigger_next = -1ULL;
|
|
break;
|
|
case EFI_TIMER_PERIODIC:
|
|
case EFI_TIMER_RELATIVE:
|
|
event->trigger_next = timer_get_us() + trigger_time;
|
|
break;
|
|
default:
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
event->trigger_type = type;
|
|
event->trigger_time = trigger_time;
|
|
event->is_signaled = false;
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* efi_set_timer_ext() - Set the trigger time for a timer event or stop the
|
|
* event
|
|
* @event: event for which the timer is set
|
|
* @type: type of the timer
|
|
* @trigger_time: trigger period in multiples of 100 ns
|
|
*
|
|
* This function implements the SetTimer service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t EFIAPI efi_set_timer_ext(struct efi_event *event,
|
|
enum efi_timer_delay type,
|
|
uint64_t trigger_time)
|
|
{
|
|
EFI_ENTRY("%p, %d, %llx", event, type, trigger_time);
|
|
return EFI_EXIT(efi_set_timer(event, type, trigger_time));
|
|
}
|
|
|
|
/**
|
|
* efi_wait_for_event() - wait for events to be signaled
|
|
* @num_events: number of events to be waited for
|
|
* @event: events to be waited for
|
|
* @index: index of the event that was signaled
|
|
*
|
|
* This function implements the WaitForEvent service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t EFIAPI efi_wait_for_event(efi_uintn_t num_events,
|
|
struct efi_event **event,
|
|
efi_uintn_t *index)
|
|
{
|
|
int i;
|
|
|
|
EFI_ENTRY("%zu, %p, %p", num_events, event, index);
|
|
|
|
/* Check parameters */
|
|
if (!num_events || !event)
|
|
return EFI_EXIT(EFI_INVALID_PARAMETER);
|
|
/* Check TPL */
|
|
if (efi_tpl != TPL_APPLICATION)
|
|
return EFI_EXIT(EFI_UNSUPPORTED);
|
|
for (i = 0; i < num_events; ++i) {
|
|
if (efi_is_event(event[i]) != EFI_SUCCESS)
|
|
return EFI_EXIT(EFI_INVALID_PARAMETER);
|
|
if (!event[i]->type || event[i]->type & EVT_NOTIFY_SIGNAL)
|
|
return EFI_EXIT(EFI_INVALID_PARAMETER);
|
|
if (!event[i]->is_signaled)
|
|
efi_queue_event(event[i]);
|
|
}
|
|
|
|
/* Wait for signal */
|
|
for (;;) {
|
|
for (i = 0; i < num_events; ++i) {
|
|
if (event[i]->is_signaled)
|
|
goto out;
|
|
}
|
|
/* Allow events to occur. */
|
|
efi_timer_check();
|
|
}
|
|
|
|
out:
|
|
/*
|
|
* Reset the signal which is passed to the caller to allow periodic
|
|
* events to occur.
|
|
*/
|
|
event[i]->is_signaled = false;
|
|
if (index)
|
|
*index = i;
|
|
|
|
return EFI_EXIT(EFI_SUCCESS);
|
|
}
|
|
|
|
/**
|
|
* efi_signal_event_ext() - signal an EFI event
|
|
* @event: event to signal
|
|
*
|
|
* This function implements the SignalEvent service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* This functions sets the signaled state of the event and queues the
|
|
* notification function for execution.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t EFIAPI efi_signal_event_ext(struct efi_event *event)
|
|
{
|
|
EFI_ENTRY("%p", event);
|
|
if (efi_is_event(event) != EFI_SUCCESS)
|
|
return EFI_EXIT(EFI_INVALID_PARAMETER);
|
|
efi_signal_event(event);
|
|
return EFI_EXIT(EFI_SUCCESS);
|
|
}
|
|
|
|
/**
|
|
* efi_close_event() - close an EFI event
|
|
* @event: event to close
|
|
*
|
|
* This function implements the CloseEvent service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t EFIAPI efi_close_event(struct efi_event *event)
|
|
{
|
|
struct efi_register_notify_event *item, *next;
|
|
|
|
EFI_ENTRY("%p", event);
|
|
if (efi_is_event(event) != EFI_SUCCESS)
|
|
return EFI_EXIT(EFI_INVALID_PARAMETER);
|
|
|
|
/* Remove protocol notify registrations for the event */
|
|
list_for_each_entry_safe(item, next, &efi_register_notify_events,
|
|
link) {
|
|
if (event == item->event) {
|
|
struct efi_protocol_notification *hitem, *hnext;
|
|
|
|
/* Remove signaled handles */
|
|
list_for_each_entry_safe(hitem, hnext, &item->handles,
|
|
link) {
|
|
list_del(&hitem->link);
|
|
free(hitem);
|
|
}
|
|
list_del(&item->link);
|
|
free(item);
|
|
}
|
|
}
|
|
/* Remove event from queue */
|
|
if (efi_event_is_queued(event))
|
|
list_del(&event->queue_link);
|
|
|
|
list_del(&event->link);
|
|
efi_free_pool(event);
|
|
return EFI_EXIT(EFI_SUCCESS);
|
|
}
|
|
|
|
/**
|
|
* efi_check_event() - check if an event is signaled
|
|
* @event: event to check
|
|
*
|
|
* This function implements the CheckEvent service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* If an event is not signaled yet, the notification function is queued. The
|
|
* signaled state is cleared.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t EFIAPI efi_check_event(struct efi_event *event)
|
|
{
|
|
EFI_ENTRY("%p", event);
|
|
efi_timer_check();
|
|
if (efi_is_event(event) != EFI_SUCCESS ||
|
|
event->type & EVT_NOTIFY_SIGNAL)
|
|
return EFI_EXIT(EFI_INVALID_PARAMETER);
|
|
if (!event->is_signaled)
|
|
efi_queue_event(event);
|
|
if (event->is_signaled) {
|
|
event->is_signaled = false;
|
|
return EFI_EXIT(EFI_SUCCESS);
|
|
}
|
|
return EFI_EXIT(EFI_NOT_READY);
|
|
}
|
|
|
|
/**
|
|
* efi_search_obj() - find the internal EFI object for a handle
|
|
* @handle: handle to find
|
|
*
|
|
* Return: EFI object
|
|
*/
|
|
struct efi_object *efi_search_obj(const efi_handle_t handle)
|
|
{
|
|
struct efi_object *efiobj;
|
|
|
|
if (!handle)
|
|
return NULL;
|
|
|
|
list_for_each_entry(efiobj, &efi_obj_list, link) {
|
|
if (efiobj == handle)
|
|
return efiobj;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* efi_open_protocol_info_entry() - create open protocol info entry and add it
|
|
* to a protocol
|
|
* @handler: handler of a protocol
|
|
*
|
|
* Return: open protocol info entry
|
|
*/
|
|
static struct efi_open_protocol_info_entry *efi_create_open_info(
|
|
struct efi_handler *handler)
|
|
{
|
|
struct efi_open_protocol_info_item *item;
|
|
|
|
item = calloc(1, sizeof(struct efi_open_protocol_info_item));
|
|
if (!item)
|
|
return NULL;
|
|
/* Append the item to the open protocol info list. */
|
|
list_add_tail(&item->link, &handler->open_infos);
|
|
|
|
return &item->info;
|
|
}
|
|
|
|
/**
|
|
* efi_delete_open_info() - remove an open protocol info entry from a protocol
|
|
* @item: open protocol info entry to delete
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t efi_delete_open_info(
|
|
struct efi_open_protocol_info_item *item)
|
|
{
|
|
list_del(&item->link);
|
|
free(item);
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* efi_add_protocol() - install new protocol on a handle
|
|
* @handle: handle on which the protocol shall be installed
|
|
* @protocol: GUID of the protocol to be installed
|
|
* @protocol_interface: interface of the protocol implementation
|
|
*
|
|
* Return: status code
|
|
*/
|
|
efi_status_t efi_add_protocol(const efi_handle_t handle,
|
|
const efi_guid_t *protocol,
|
|
void *protocol_interface)
|
|
{
|
|
struct efi_object *efiobj;
|
|
struct efi_handler *handler;
|
|
efi_status_t ret;
|
|
struct efi_register_notify_event *event;
|
|
|
|
efiobj = efi_search_obj(handle);
|
|
if (!efiobj)
|
|
return EFI_INVALID_PARAMETER;
|
|
ret = efi_search_protocol(handle, protocol, NULL);
|
|
if (ret != EFI_NOT_FOUND)
|
|
return EFI_INVALID_PARAMETER;
|
|
handler = calloc(1, sizeof(struct efi_handler));
|
|
if (!handler)
|
|
return EFI_OUT_OF_RESOURCES;
|
|
memcpy((void *)&handler->guid, protocol, sizeof(efi_guid_t));
|
|
handler->protocol_interface = protocol_interface;
|
|
INIT_LIST_HEAD(&handler->open_infos);
|
|
list_add_tail(&handler->link, &efiobj->protocols);
|
|
|
|
/* Notify registered events */
|
|
list_for_each_entry(event, &efi_register_notify_events, link) {
|
|
if (!guidcmp(protocol, &event->protocol)) {
|
|
struct efi_protocol_notification *notif;
|
|
|
|
notif = calloc(1, sizeof(*notif));
|
|
if (!notif) {
|
|
list_del(&handler->link);
|
|
free(handler);
|
|
return EFI_OUT_OF_RESOURCES;
|
|
}
|
|
notif->handle = handle;
|
|
list_add_tail(¬if->link, &event->handles);
|
|
event->event->is_signaled = false;
|
|
efi_signal_event(event->event);
|
|
}
|
|
}
|
|
|
|
if (!guidcmp(&efi_guid_device_path, protocol))
|
|
EFI_PRINT("installed device path '%pD'\n", protocol_interface);
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* efi_install_protocol_interface() - install protocol interface
|
|
* @handle: handle on which the protocol shall be installed
|
|
* @protocol: GUID of the protocol to be installed
|
|
* @protocol_interface_type: type of the interface to be installed,
|
|
* always EFI_NATIVE_INTERFACE
|
|
* @protocol_interface: interface of the protocol implementation
|
|
*
|
|
* This function implements the InstallProtocolInterface service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t EFIAPI efi_install_protocol_interface(
|
|
efi_handle_t *handle, const efi_guid_t *protocol,
|
|
int protocol_interface_type, void *protocol_interface)
|
|
{
|
|
efi_status_t r;
|
|
|
|
EFI_ENTRY("%p, %pUs, %d, %p", handle, protocol, protocol_interface_type,
|
|
protocol_interface);
|
|
|
|
if (!handle || !protocol ||
|
|
protocol_interface_type != EFI_NATIVE_INTERFACE) {
|
|
r = EFI_INVALID_PARAMETER;
|
|
goto out;
|
|
}
|
|
|
|
/* Create new handle if requested. */
|
|
if (!*handle) {
|
|
r = efi_create_handle(handle);
|
|
if (r != EFI_SUCCESS)
|
|
goto out;
|
|
EFI_PRINT("new handle %p\n", *handle);
|
|
} else {
|
|
EFI_PRINT("handle %p\n", *handle);
|
|
}
|
|
/* Add new protocol */
|
|
r = efi_add_protocol(*handle, protocol, protocol_interface);
|
|
out:
|
|
return EFI_EXIT(r);
|
|
}
|
|
|
|
/**
|
|
* efi_get_drivers() - get all drivers associated to a controller
|
|
* @handle: handle of the controller
|
|
* @protocol: protocol GUID (optional)
|
|
* @number_of_drivers: number of child controllers
|
|
* @driver_handle_buffer: handles of the the drivers
|
|
*
|
|
* The allocated buffer has to be freed with free().
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t efi_get_drivers(efi_handle_t handle,
|
|
const efi_guid_t *protocol,
|
|
efi_uintn_t *number_of_drivers,
|
|
efi_handle_t **driver_handle_buffer)
|
|
{
|
|
struct efi_handler *handler;
|
|
struct efi_open_protocol_info_item *item;
|
|
efi_uintn_t count = 0, i;
|
|
bool duplicate;
|
|
|
|
/* Count all driver associations */
|
|
list_for_each_entry(handler, &handle->protocols, link) {
|
|
if (protocol && guidcmp(&handler->guid, protocol))
|
|
continue;
|
|
list_for_each_entry(item, &handler->open_infos, link) {
|
|
if (item->info.attributes &
|
|
EFI_OPEN_PROTOCOL_BY_DRIVER)
|
|
++count;
|
|
}
|
|
}
|
|
*number_of_drivers = 0;
|
|
if (!count) {
|
|
*driver_handle_buffer = NULL;
|
|
return EFI_SUCCESS;
|
|
}
|
|
/*
|
|
* Create buffer. In case of duplicate driver assignments the buffer
|
|
* will be too large. But that does not harm.
|
|
*/
|
|
*driver_handle_buffer = calloc(count, sizeof(efi_handle_t));
|
|
if (!*driver_handle_buffer)
|
|
return EFI_OUT_OF_RESOURCES;
|
|
/* Collect unique driver handles */
|
|
list_for_each_entry(handler, &handle->protocols, link) {
|
|
if (protocol && guidcmp(&handler->guid, protocol))
|
|
continue;
|
|
list_for_each_entry(item, &handler->open_infos, link) {
|
|
if (item->info.attributes &
|
|
EFI_OPEN_PROTOCOL_BY_DRIVER) {
|
|
/* Check this is a new driver */
|
|
duplicate = false;
|
|
for (i = 0; i < *number_of_drivers; ++i) {
|
|
if ((*driver_handle_buffer)[i] ==
|
|
item->info.agent_handle)
|
|
duplicate = true;
|
|
}
|
|
/* Copy handle to buffer */
|
|
if (!duplicate) {
|
|
i = (*number_of_drivers)++;
|
|
(*driver_handle_buffer)[i] =
|
|
item->info.agent_handle;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* efi_disconnect_all_drivers() - disconnect all drivers from a controller
|
|
* @handle: handle of the controller
|
|
* @protocol: protocol GUID (optional)
|
|
* @child_handle: handle of the child to destroy
|
|
*
|
|
* This function implements the DisconnectController service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t efi_disconnect_all_drivers
|
|
(efi_handle_t handle,
|
|
const efi_guid_t *protocol,
|
|
efi_handle_t child_handle)
|
|
{
|
|
efi_uintn_t number_of_drivers;
|
|
efi_handle_t *driver_handle_buffer;
|
|
efi_status_t r, ret;
|
|
|
|
ret = efi_get_drivers(handle, protocol, &number_of_drivers,
|
|
&driver_handle_buffer);
|
|
if (ret != EFI_SUCCESS)
|
|
return ret;
|
|
if (!number_of_drivers)
|
|
return EFI_SUCCESS;
|
|
|
|
while (number_of_drivers) {
|
|
r = EFI_CALL(efi_disconnect_controller(
|
|
handle,
|
|
driver_handle_buffer[--number_of_drivers],
|
|
child_handle));
|
|
if (r != EFI_SUCCESS)
|
|
ret = r;
|
|
}
|
|
|
|
free(driver_handle_buffer);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* efi_uninstall_protocol() - uninstall protocol interface
|
|
*
|
|
* @handle: handle from which the protocol shall be removed
|
|
* @protocol: GUID of the protocol to be removed
|
|
* @protocol_interface: interface to be removed
|
|
* @preserve: preserve or delete the handle and remove it from any
|
|
* list it participates if no protocols remain
|
|
*
|
|
* This function DOES NOT delete a handle without installed protocol.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t efi_uninstall_protocol
|
|
(efi_handle_t handle, const efi_guid_t *protocol,
|
|
void *protocol_interface, bool preserve)
|
|
{
|
|
struct efi_handler *handler;
|
|
struct efi_open_protocol_info_item *item;
|
|
struct efi_open_protocol_info_item *pos;
|
|
efi_status_t r;
|
|
|
|
/* Find the protocol on the handle */
|
|
r = efi_search_protocol(handle, protocol, &handler);
|
|
if (r != EFI_SUCCESS)
|
|
goto out;
|
|
if (handler->protocol_interface != protocol_interface)
|
|
return EFI_NOT_FOUND;
|
|
/* Disconnect controllers */
|
|
r = efi_disconnect_all_drivers(handle, protocol, NULL);
|
|
if (r != EFI_SUCCESS) {
|
|
r = EFI_ACCESS_DENIED;
|
|
/*
|
|
* This will reconnect all controllers of the handle, even ones
|
|
* that were not connected before. This can be done better
|
|
* but we are following the EDKII implementation on this for
|
|
* now
|
|
*/
|
|
EFI_CALL(efi_connect_controller(handle, NULL, NULL, true));
|
|
goto out;
|
|
}
|
|
/* Close protocol */
|
|
list_for_each_entry_safe(item, pos, &handler->open_infos, link) {
|
|
if (item->info.attributes ==
|
|
EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL ||
|
|
item->info.attributes == EFI_OPEN_PROTOCOL_GET_PROTOCOL ||
|
|
item->info.attributes == EFI_OPEN_PROTOCOL_TEST_PROTOCOL)
|
|
efi_delete_open_info(item);
|
|
}
|
|
/* if agents didn't close the protocols properly */
|
|
if (!list_empty(&handler->open_infos)) {
|
|
r = EFI_ACCESS_DENIED;
|
|
EFI_CALL(efi_connect_controller(handle, NULL, NULL, true));
|
|
goto out;
|
|
}
|
|
r = efi_remove_protocol(handle, protocol, protocol_interface);
|
|
if (r != EFI_SUCCESS)
|
|
return r;
|
|
/*
|
|
* We don't care about the return value here since the
|
|
* handle might have more protocols installed
|
|
*/
|
|
if (!preserve)
|
|
efi_purge_handle(handle);
|
|
out:
|
|
return r;
|
|
}
|
|
|
|
/**
|
|
* efi_uninstall_protocol_interface() - uninstall protocol interface
|
|
* @handle: handle from which the protocol shall be removed
|
|
* @protocol: GUID of the protocol to be removed
|
|
* @protocol_interface: interface to be removed
|
|
*
|
|
* This function implements the UninstallProtocolInterface service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t EFIAPI efi_uninstall_protocol_interface
|
|
(efi_handle_t handle, const efi_guid_t *protocol,
|
|
void *protocol_interface)
|
|
{
|
|
efi_status_t ret;
|
|
|
|
EFI_ENTRY("%p, %pUs, %p", handle, protocol, protocol_interface);
|
|
|
|
ret = efi_uninstall_protocol(handle, protocol, protocol_interface, false);
|
|
if (ret != EFI_SUCCESS)
|
|
goto out;
|
|
|
|
out:
|
|
return EFI_EXIT(ret);
|
|
}
|
|
|
|
/**
|
|
* efi_register_protocol_notify() - register an event for notification when a
|
|
* protocol is installed.
|
|
* @protocol: GUID of the protocol whose installation shall be notified
|
|
* @event: event to be signaled upon installation of the protocol
|
|
* @registration: key for retrieving the registration information
|
|
*
|
|
* This function implements the RegisterProtocolNotify service.
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification
|
|
* for details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
efi_status_t EFIAPI efi_register_protocol_notify(const efi_guid_t *protocol,
|
|
struct efi_event *event,
|
|
void **registration)
|
|
{
|
|
struct efi_register_notify_event *item;
|
|
efi_status_t ret = EFI_SUCCESS;
|
|
|
|
EFI_ENTRY("%pUs, %p, %p", protocol, event, registration);
|
|
|
|
if (!protocol || !event || !registration) {
|
|
ret = EFI_INVALID_PARAMETER;
|
|
goto out;
|
|
}
|
|
|
|
item = calloc(1, sizeof(struct efi_register_notify_event));
|
|
if (!item) {
|
|
ret = EFI_OUT_OF_RESOURCES;
|
|
goto out;
|
|
}
|
|
|
|
item->event = event;
|
|
guidcpy(&item->protocol, protocol);
|
|
INIT_LIST_HEAD(&item->handles);
|
|
|
|
list_add_tail(&item->link, &efi_register_notify_events);
|
|
|
|
*registration = item;
|
|
out:
|
|
return EFI_EXIT(ret);
|
|
}
|
|
|
|
/**
|
|
* efi_search() - determine if an EFI handle implements a protocol
|
|
*
|
|
* @search_type: selection criterion
|
|
* @protocol: GUID of the protocol
|
|
* @handle: handle
|
|
*
|
|
* See the documentation of the LocateHandle service in the UEFI specification.
|
|
*
|
|
* Return: 0 if the handle implements the protocol
|
|
*/
|
|
static int efi_search(enum efi_locate_search_type search_type,
|
|
const efi_guid_t *protocol, efi_handle_t handle)
|
|
{
|
|
efi_status_t ret;
|
|
|
|
switch (search_type) {
|
|
case ALL_HANDLES:
|
|
return 0;
|
|
case BY_PROTOCOL:
|
|
ret = efi_search_protocol(handle, protocol, NULL);
|
|
return (ret != EFI_SUCCESS);
|
|
default:
|
|
/* Invalid search type */
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* efi_check_register_notify_event() - check if registration key is valid
|
|
*
|
|
* Check that a pointer is a valid registration key as returned by
|
|
* RegisterProtocolNotify().
|
|
*
|
|
* @key: registration key
|
|
* Return: valid registration key or NULL
|
|
*/
|
|
static struct efi_register_notify_event *efi_check_register_notify_event
|
|
(void *key)
|
|
{
|
|
struct efi_register_notify_event *event;
|
|
|
|
list_for_each_entry(event, &efi_register_notify_events, link) {
|
|
if (event == (struct efi_register_notify_event *)key)
|
|
return event;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* efi_locate_handle() - locate handles implementing a protocol
|
|
*
|
|
* @search_type: selection criterion
|
|
* @protocol: GUID of the protocol
|
|
* @search_key: registration key
|
|
* @buffer_size: size of the buffer to receive the handles in bytes
|
|
* @buffer: buffer to receive the relevant handles
|
|
*
|
|
* This function is meant for U-Boot internal calls. For the API implementation
|
|
* of the LocateHandle service see efi_locate_handle_ext.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t efi_locate_handle(
|
|
enum efi_locate_search_type search_type,
|
|
const efi_guid_t *protocol, void *search_key,
|
|
efi_uintn_t *buffer_size, efi_handle_t *buffer)
|
|
{
|
|
struct efi_object *efiobj;
|
|
efi_uintn_t size = 0;
|
|
struct efi_register_notify_event *event;
|
|
struct efi_protocol_notification *handle = NULL;
|
|
|
|
/* Check parameters */
|
|
switch (search_type) {
|
|
case ALL_HANDLES:
|
|
break;
|
|
case BY_REGISTER_NOTIFY:
|
|
if (!search_key)
|
|
return EFI_INVALID_PARAMETER;
|
|
/* Check that the registration key is valid */
|
|
event = efi_check_register_notify_event(search_key);
|
|
if (!event)
|
|
return EFI_INVALID_PARAMETER;
|
|
break;
|
|
case BY_PROTOCOL:
|
|
if (!protocol)
|
|
return EFI_INVALID_PARAMETER;
|
|
break;
|
|
default:
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
/* Count how much space we need */
|
|
if (search_type == BY_REGISTER_NOTIFY) {
|
|
if (list_empty(&event->handles))
|
|
return EFI_NOT_FOUND;
|
|
handle = list_first_entry(&event->handles,
|
|
struct efi_protocol_notification,
|
|
link);
|
|
efiobj = handle->handle;
|
|
size += sizeof(void *);
|
|
} else {
|
|
list_for_each_entry(efiobj, &efi_obj_list, link) {
|
|
if (!efi_search(search_type, protocol, efiobj))
|
|
size += sizeof(void *);
|
|
}
|
|
if (size == 0)
|
|
return EFI_NOT_FOUND;
|
|
}
|
|
|
|
if (!buffer_size)
|
|
return EFI_INVALID_PARAMETER;
|
|
|
|
if (*buffer_size < size) {
|
|
*buffer_size = size;
|
|
return EFI_BUFFER_TOO_SMALL;
|
|
}
|
|
|
|
*buffer_size = size;
|
|
|
|
/* The buffer size is sufficient but there is no buffer */
|
|
if (!buffer)
|
|
return EFI_INVALID_PARAMETER;
|
|
|
|
/* Then fill the array */
|
|
if (search_type == BY_REGISTER_NOTIFY) {
|
|
*buffer = efiobj;
|
|
list_del(&handle->link);
|
|
} else {
|
|
list_for_each_entry(efiobj, &efi_obj_list, link) {
|
|
if (!efi_search(search_type, protocol, efiobj))
|
|
*buffer++ = efiobj;
|
|
}
|
|
}
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* efi_locate_handle_ext() - locate handles implementing a protocol.
|
|
* @search_type: selection criterion
|
|
* @protocol: GUID of the protocol
|
|
* @search_key: registration key
|
|
* @buffer_size: size of the buffer to receive the handles in bytes
|
|
* @buffer: buffer to receive the relevant handles
|
|
*
|
|
* This function implements the LocateHandle service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* Return: 0 if the handle implements the protocol
|
|
*/
|
|
static efi_status_t EFIAPI efi_locate_handle_ext(
|
|
enum efi_locate_search_type search_type,
|
|
const efi_guid_t *protocol, void *search_key,
|
|
efi_uintn_t *buffer_size, efi_handle_t *buffer)
|
|
{
|
|
EFI_ENTRY("%d, %pUs, %p, %p, %p", search_type, protocol, search_key,
|
|
buffer_size, buffer);
|
|
|
|
return EFI_EXIT(efi_locate_handle(search_type, protocol, search_key,
|
|
buffer_size, buffer));
|
|
}
|
|
|
|
/**
|
|
* efi_remove_configuration_table() - collapses configuration table entries,
|
|
* removing index i
|
|
*
|
|
* @i: index of the table entry to be removed
|
|
*/
|
|
static void efi_remove_configuration_table(int i)
|
|
{
|
|
struct efi_configuration_table *this = &systab.tables[i];
|
|
struct efi_configuration_table *next = &systab.tables[i + 1];
|
|
struct efi_configuration_table *end = &systab.tables[systab.nr_tables];
|
|
|
|
memmove(this, next, (ulong)end - (ulong)next);
|
|
systab.nr_tables--;
|
|
}
|
|
|
|
/**
|
|
* efi_install_configuration_table() - adds, updates, or removes a
|
|
* configuration table
|
|
* @guid: GUID of the installed table
|
|
* @table: table to be installed
|
|
*
|
|
* This function is used for internal calls. For the API implementation of the
|
|
* InstallConfigurationTable service see efi_install_configuration_table_ext.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
efi_status_t efi_install_configuration_table(const efi_guid_t *guid,
|
|
void *table)
|
|
{
|
|
struct efi_event *evt;
|
|
int i;
|
|
|
|
if (!guid)
|
|
return EFI_INVALID_PARAMETER;
|
|
|
|
/* Check for GUID override */
|
|
for (i = 0; i < systab.nr_tables; i++) {
|
|
if (!guidcmp(guid, &systab.tables[i].guid)) {
|
|
if (table)
|
|
systab.tables[i].table = table;
|
|
else
|
|
efi_remove_configuration_table(i);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (!table)
|
|
return EFI_NOT_FOUND;
|
|
|
|
/* No override, check for overflow */
|
|
if (i >= EFI_MAX_CONFIGURATION_TABLES)
|
|
return EFI_OUT_OF_RESOURCES;
|
|
|
|
/* Add a new entry */
|
|
guidcpy(&systab.tables[i].guid, guid);
|
|
systab.tables[i].table = table;
|
|
systab.nr_tables = i + 1;
|
|
|
|
out:
|
|
/* systab.nr_tables may have changed. So we need to update the CRC32 */
|
|
efi_update_table_header_crc32(&systab.hdr);
|
|
|
|
/* Notify that the configuration table was changed */
|
|
list_for_each_entry(evt, &efi_events, link) {
|
|
if (evt->group && !guidcmp(evt->group, guid)) {
|
|
efi_signal_event(evt);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* efi_install_configuration_table_ex() - Adds, updates, or removes a
|
|
* configuration table.
|
|
* @guid: GUID of the installed table
|
|
* @table: table to be installed
|
|
*
|
|
* This function implements the InstallConfigurationTable service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t
|
|
EFIAPI efi_install_configuration_table_ext(const efi_guid_t *guid,
|
|
void *table)
|
|
{
|
|
EFI_ENTRY("%pUs, %p", guid, table);
|
|
return EFI_EXIT(efi_install_configuration_table(guid, table));
|
|
}
|
|
|
|
/**
|
|
* efi_setup_loaded_image() - initialize a loaded image
|
|
*
|
|
* Initialize a loaded_image_info and loaded_image_info object with correct
|
|
* protocols, boot-device, etc.
|
|
*
|
|
* In case of an error \*handle_ptr and \*info_ptr are set to NULL and an error
|
|
* code is returned.
|
|
*
|
|
* @device_path: device path of the loaded image
|
|
* @file_path: file path of the loaded image
|
|
* @handle_ptr: handle of the loaded image
|
|
* @info_ptr: loaded image protocol
|
|
* Return: status code
|
|
*/
|
|
efi_status_t efi_setup_loaded_image(struct efi_device_path *device_path,
|
|
struct efi_device_path *file_path,
|
|
struct efi_loaded_image_obj **handle_ptr,
|
|
struct efi_loaded_image **info_ptr)
|
|
{
|
|
efi_status_t ret;
|
|
struct efi_loaded_image *info = NULL;
|
|
struct efi_loaded_image_obj *obj = NULL;
|
|
struct efi_device_path *dp;
|
|
|
|
/* In case of EFI_OUT_OF_RESOURCES avoid illegal free by caller. */
|
|
*handle_ptr = NULL;
|
|
*info_ptr = NULL;
|
|
|
|
info = calloc(1, sizeof(*info));
|
|
if (!info)
|
|
return EFI_OUT_OF_RESOURCES;
|
|
obj = calloc(1, sizeof(*obj));
|
|
if (!obj) {
|
|
free(info);
|
|
return EFI_OUT_OF_RESOURCES;
|
|
}
|
|
obj->header.type = EFI_OBJECT_TYPE_LOADED_IMAGE;
|
|
|
|
/* Add internal object to object list */
|
|
efi_add_handle(&obj->header);
|
|
|
|
info->revision = EFI_LOADED_IMAGE_PROTOCOL_REVISION;
|
|
info->file_path = file_path;
|
|
info->system_table = &systab;
|
|
|
|
if (device_path) {
|
|
info->device_handle = efi_dp_find_obj(device_path, NULL, NULL);
|
|
|
|
dp = efi_dp_concat(device_path, file_path, 0);
|
|
if (!dp) {
|
|
ret = EFI_OUT_OF_RESOURCES;
|
|
goto failure;
|
|
}
|
|
} else {
|
|
dp = NULL;
|
|
}
|
|
ret = efi_add_protocol(&obj->header,
|
|
&efi_guid_loaded_image_device_path, dp);
|
|
if (ret != EFI_SUCCESS)
|
|
goto failure;
|
|
|
|
/*
|
|
* When asking for the loaded_image interface, just
|
|
* return handle which points to loaded_image_info
|
|
*/
|
|
ret = efi_add_protocol(&obj->header,
|
|
&efi_guid_loaded_image, info);
|
|
if (ret != EFI_SUCCESS)
|
|
goto failure;
|
|
|
|
*info_ptr = info;
|
|
*handle_ptr = obj;
|
|
|
|
return ret;
|
|
failure:
|
|
printf("ERROR: Failure to install protocols for loaded image\n");
|
|
efi_delete_handle(&obj->header);
|
|
free(info);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* efi_locate_device_path() - Get the device path and handle of an device
|
|
* implementing a protocol
|
|
* @protocol: GUID of the protocol
|
|
* @device_path: device path
|
|
* @device: handle of the device
|
|
*
|
|
* This function implements the LocateDevicePath service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
efi_status_t EFIAPI efi_locate_device_path(const efi_guid_t *protocol,
|
|
struct efi_device_path **device_path,
|
|
efi_handle_t *device)
|
|
{
|
|
struct efi_device_path *dp;
|
|
size_t i;
|
|
struct efi_handler *handler;
|
|
efi_handle_t *handles;
|
|
size_t len, len_dp;
|
|
size_t len_best = 0;
|
|
efi_uintn_t no_handles;
|
|
u8 *remainder;
|
|
efi_status_t ret;
|
|
|
|
EFI_ENTRY("%pUs, %p, %p", protocol, device_path, device);
|
|
|
|
if (!protocol || !device_path || !*device_path) {
|
|
ret = EFI_INVALID_PARAMETER;
|
|
goto out;
|
|
}
|
|
|
|
/* Find end of device path */
|
|
len = efi_dp_instance_size(*device_path);
|
|
|
|
/* Get all handles implementing the protocol */
|
|
ret = EFI_CALL(efi_locate_handle_buffer(BY_PROTOCOL, protocol, NULL,
|
|
&no_handles, &handles));
|
|
if (ret != EFI_SUCCESS)
|
|
goto out;
|
|
|
|
for (i = 0; i < no_handles; ++i) {
|
|
/* Find the device path protocol */
|
|
ret = efi_search_protocol(handles[i], &efi_guid_device_path,
|
|
&handler);
|
|
if (ret != EFI_SUCCESS)
|
|
continue;
|
|
dp = (struct efi_device_path *)handler->protocol_interface;
|
|
len_dp = efi_dp_instance_size(dp);
|
|
/*
|
|
* This handle can only be a better fit
|
|
* if its device path length is longer than the best fit and
|
|
* if its device path length is shorter of equal the searched
|
|
* device path.
|
|
*/
|
|
if (len_dp <= len_best || len_dp > len)
|
|
continue;
|
|
/* Check if dp is a subpath of device_path */
|
|
if (memcmp(*device_path, dp, len_dp))
|
|
continue;
|
|
if (!device) {
|
|
ret = EFI_INVALID_PARAMETER;
|
|
goto out;
|
|
}
|
|
*device = handles[i];
|
|
len_best = len_dp;
|
|
}
|
|
if (len_best) {
|
|
remainder = (u8 *)*device_path + len_best;
|
|
*device_path = (struct efi_device_path *)remainder;
|
|
ret = EFI_SUCCESS;
|
|
} else {
|
|
ret = EFI_NOT_FOUND;
|
|
}
|
|
out:
|
|
return EFI_EXIT(ret);
|
|
}
|
|
|
|
/**
|
|
* efi_load_image_from_file() - load an image from file system
|
|
*
|
|
* Read a file into a buffer allocated as EFI_BOOT_SERVICES_DATA. It is the
|
|
* callers obligation to update the memory type as needed.
|
|
*
|
|
* @file_path: the path of the image to load
|
|
* @buffer: buffer containing the loaded image
|
|
* @size: size of the loaded image
|
|
* Return: status code
|
|
*/
|
|
static
|
|
efi_status_t efi_load_image_from_file(struct efi_device_path *file_path,
|
|
void **buffer, efi_uintn_t *size)
|
|
{
|
|
struct efi_file_handle *f;
|
|
efi_status_t ret;
|
|
u64 addr;
|
|
efi_uintn_t bs;
|
|
|
|
/* Open file */
|
|
f = efi_file_from_path(file_path);
|
|
if (!f)
|
|
return EFI_NOT_FOUND;
|
|
|
|
ret = efi_file_size(f, &bs);
|
|
if (ret != EFI_SUCCESS)
|
|
goto error;
|
|
|
|
/*
|
|
* When reading the file we do not yet know if it contains an
|
|
* application, a boottime driver, or a runtime driver. So here we
|
|
* allocate a buffer as EFI_BOOT_SERVICES_DATA. The caller has to
|
|
* update the reservation according to the image type.
|
|
*/
|
|
ret = efi_allocate_pages(EFI_ALLOCATE_ANY_PAGES,
|
|
EFI_BOOT_SERVICES_DATA,
|
|
efi_size_in_pages(bs), &addr);
|
|
if (ret != EFI_SUCCESS) {
|
|
ret = EFI_OUT_OF_RESOURCES;
|
|
goto error;
|
|
}
|
|
|
|
/* Read file */
|
|
EFI_CALL(ret = f->read(f, &bs, (void *)(uintptr_t)addr));
|
|
if (ret != EFI_SUCCESS)
|
|
efi_free_pages(addr, efi_size_in_pages(bs));
|
|
*buffer = (void *)(uintptr_t)addr;
|
|
*size = bs;
|
|
error:
|
|
EFI_CALL(f->close(f));
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* efi_load_image_from_path() - load an image using a file path
|
|
*
|
|
* Read a file into a buffer allocated as EFI_BOOT_SERVICES_DATA. It is the
|
|
* callers obligation to update the memory type as needed.
|
|
*
|
|
* @boot_policy: true for request originating from the boot manager
|
|
* @file_path: the path of the image to load
|
|
* @buffer: buffer containing the loaded image
|
|
* @size: size of the loaded image
|
|
* Return: status code
|
|
*/
|
|
efi_status_t efi_load_image_from_path(bool boot_policy,
|
|
struct efi_device_path *file_path,
|
|
void **buffer, efi_uintn_t *size)
|
|
{
|
|
efi_handle_t device;
|
|
efi_status_t ret;
|
|
struct efi_device_path *dp, *rem;
|
|
struct efi_load_file_protocol *load_file_protocol = NULL;
|
|
efi_uintn_t buffer_size;
|
|
uint64_t addr, pages;
|
|
const efi_guid_t *guid;
|
|
struct efi_handler *handler;
|
|
|
|
/* In case of failure nothing is returned */
|
|
*buffer = NULL;
|
|
*size = 0;
|
|
|
|
dp = file_path;
|
|
device = efi_dp_find_obj(dp, NULL, &rem);
|
|
ret = efi_search_protocol(device, &efi_simple_file_system_protocol_guid,
|
|
NULL);
|
|
if (ret == EFI_SUCCESS)
|
|
return efi_load_image_from_file(file_path, buffer, size);
|
|
|
|
ret = efi_search_protocol(device, &efi_guid_load_file_protocol, NULL);
|
|
if (ret == EFI_SUCCESS) {
|
|
guid = &efi_guid_load_file_protocol;
|
|
} else if (!boot_policy) {
|
|
guid = &efi_guid_load_file2_protocol;
|
|
ret = efi_search_protocol(device, guid, NULL);
|
|
}
|
|
if (ret != EFI_SUCCESS)
|
|
return EFI_NOT_FOUND;
|
|
ret = efi_search_protocol(device, guid, &handler);
|
|
if (ret != EFI_SUCCESS)
|
|
return EFI_NOT_FOUND;
|
|
buffer_size = 0;
|
|
load_file_protocol = handler->protocol_interface;
|
|
ret = EFI_CALL(load_file_protocol->load_file(
|
|
load_file_protocol, rem, boot_policy,
|
|
&buffer_size, NULL));
|
|
if (ret != EFI_BUFFER_TOO_SMALL)
|
|
goto out;
|
|
pages = efi_size_in_pages(buffer_size);
|
|
ret = efi_allocate_pages(EFI_ALLOCATE_ANY_PAGES, EFI_BOOT_SERVICES_DATA,
|
|
pages, &addr);
|
|
if (ret != EFI_SUCCESS) {
|
|
ret = EFI_OUT_OF_RESOURCES;
|
|
goto out;
|
|
}
|
|
ret = EFI_CALL(load_file_protocol->load_file(
|
|
load_file_protocol, rem, boot_policy,
|
|
&buffer_size, (void *)(uintptr_t)addr));
|
|
if (ret != EFI_SUCCESS)
|
|
efi_free_pages(addr, pages);
|
|
out:
|
|
efi_close_protocol(device, guid, efi_root, NULL);
|
|
if (ret == EFI_SUCCESS) {
|
|
*buffer = (void *)(uintptr_t)addr;
|
|
*size = buffer_size;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* efi_load_image() - load an EFI image into memory
|
|
* @boot_policy: true for request originating from the boot manager
|
|
* @parent_image: the caller's image handle
|
|
* @file_path: the path of the image to load
|
|
* @source_buffer: memory location from which the image is installed
|
|
* @source_size: size of the memory area from which the image is installed
|
|
* @image_handle: handle for the newly installed image
|
|
*
|
|
* This function implements the LoadImage service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification
|
|
* for details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
efi_status_t EFIAPI efi_load_image(bool boot_policy,
|
|
efi_handle_t parent_image,
|
|
struct efi_device_path *file_path,
|
|
void *source_buffer,
|
|
efi_uintn_t source_size,
|
|
efi_handle_t *image_handle)
|
|
{
|
|
struct efi_device_path *dp, *fp;
|
|
struct efi_loaded_image *info = NULL;
|
|
struct efi_loaded_image_obj **image_obj =
|
|
(struct efi_loaded_image_obj **)image_handle;
|
|
efi_status_t ret;
|
|
void *dest_buffer;
|
|
|
|
EFI_ENTRY("%d, %p, %pD, %p, %zu, %p", boot_policy, parent_image,
|
|
file_path, source_buffer, source_size, image_handle);
|
|
|
|
if (!image_handle || (!source_buffer && !file_path) ||
|
|
!efi_search_obj(parent_image) ||
|
|
/* The parent image handle must refer to a loaded image */
|
|
!parent_image->type) {
|
|
ret = EFI_INVALID_PARAMETER;
|
|
goto error;
|
|
}
|
|
|
|
if (!source_buffer) {
|
|
ret = efi_load_image_from_path(boot_policy, file_path,
|
|
&dest_buffer, &source_size);
|
|
if (ret != EFI_SUCCESS)
|
|
goto error;
|
|
} else {
|
|
dest_buffer = source_buffer;
|
|
}
|
|
/* split file_path which contains both the device and file parts */
|
|
efi_dp_split_file_path(file_path, &dp, &fp);
|
|
ret = efi_setup_loaded_image(dp, fp, image_obj, &info);
|
|
if (ret == EFI_SUCCESS)
|
|
ret = efi_load_pe(*image_obj, dest_buffer, source_size, info);
|
|
if (!source_buffer)
|
|
/* Release buffer to which file was loaded */
|
|
efi_free_pages((uintptr_t)dest_buffer,
|
|
efi_size_in_pages(source_size));
|
|
if (ret == EFI_SUCCESS || ret == EFI_SECURITY_VIOLATION) {
|
|
info->system_table = &systab;
|
|
info->parent_handle = parent_image;
|
|
} else {
|
|
/* The image is invalid. Release all associated resources. */
|
|
efi_delete_handle(*image_handle);
|
|
*image_handle = NULL;
|
|
free(info);
|
|
}
|
|
error:
|
|
return EFI_EXIT(ret);
|
|
}
|
|
|
|
/**
|
|
* efi_exit_caches() - fix up caches for EFI payloads if necessary
|
|
*/
|
|
static void efi_exit_caches(void)
|
|
{
|
|
#if defined(CONFIG_EFI_GRUB_ARM32_WORKAROUND)
|
|
/*
|
|
* Boooting Linux via GRUB prior to version 2.04 fails on 32bit ARM if
|
|
* caches are enabled.
|
|
*
|
|
* TODO:
|
|
* According to the UEFI spec caches that can be managed via CP15
|
|
* operations should be enabled. Caches requiring platform information
|
|
* to manage should be disabled. This should not happen in
|
|
* ExitBootServices() but before invoking any UEFI binary is invoked.
|
|
*
|
|
* We want to keep the current workaround while GRUB prior to version
|
|
* 2.04 is still in use.
|
|
*/
|
|
cleanup_before_linux();
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* efi_exit_boot_services() - stop all boot services
|
|
* @image_handle: handle of the loaded image
|
|
* @map_key: key of the memory map
|
|
*
|
|
* This function implements the ExitBootServices service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification
|
|
* for details.
|
|
*
|
|
* All timer events are disabled. For exit boot services events the
|
|
* notification function is called. The boot services are disabled in the
|
|
* system table.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t EFIAPI efi_exit_boot_services(efi_handle_t image_handle,
|
|
efi_uintn_t map_key)
|
|
{
|
|
struct efi_event *evt, *next_event;
|
|
efi_status_t ret = EFI_SUCCESS;
|
|
|
|
EFI_ENTRY("%p, %zx", image_handle, map_key);
|
|
|
|
/* Check that the caller has read the current memory map */
|
|
if (map_key != efi_memory_map_key) {
|
|
ret = EFI_INVALID_PARAMETER;
|
|
goto out;
|
|
}
|
|
|
|
/* Check if ExitBootServices has already been called */
|
|
if (!systab.boottime)
|
|
goto out;
|
|
|
|
/* Notify EFI_EVENT_GROUP_BEFORE_EXIT_BOOT_SERVICES event group. */
|
|
list_for_each_entry(evt, &efi_events, link) {
|
|
if (evt->group &&
|
|
!guidcmp(evt->group,
|
|
&efi_guid_event_group_before_exit_boot_services)) {
|
|
efi_signal_event(evt);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Stop all timer related activities */
|
|
timers_enabled = false;
|
|
|
|
/* Add related events to the event group */
|
|
list_for_each_entry(evt, &efi_events, link) {
|
|
if (evt->type == EVT_SIGNAL_EXIT_BOOT_SERVICES)
|
|
evt->group = &efi_guid_event_group_exit_boot_services;
|
|
}
|
|
/* Notify that ExitBootServices is invoked. */
|
|
list_for_each_entry(evt, &efi_events, link) {
|
|
if (evt->group &&
|
|
!guidcmp(evt->group,
|
|
&efi_guid_event_group_exit_boot_services)) {
|
|
efi_signal_event(evt);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Make sure that notification functions are not called anymore */
|
|
efi_tpl = TPL_HIGH_LEVEL;
|
|
|
|
/* Notify variable services */
|
|
efi_variables_boot_exit_notify();
|
|
|
|
/* Remove all events except EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE */
|
|
list_for_each_entry_safe(evt, next_event, &efi_events, link) {
|
|
if (evt->type != EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE)
|
|
list_del(&evt->link);
|
|
}
|
|
|
|
if (!efi_st_keep_devices) {
|
|
bootm_disable_interrupts();
|
|
if (IS_ENABLED(CONFIG_USB_DEVICE))
|
|
udc_disconnect();
|
|
board_quiesce_devices();
|
|
dm_remove_devices_active();
|
|
}
|
|
|
|
/* Patch out unsupported runtime function */
|
|
efi_runtime_detach();
|
|
|
|
/* Fix up caches for EFI payloads if necessary */
|
|
efi_exit_caches();
|
|
|
|
/* Disable boot time services */
|
|
systab.con_in_handle = NULL;
|
|
systab.con_in = NULL;
|
|
systab.con_out_handle = NULL;
|
|
systab.con_out = NULL;
|
|
systab.stderr_handle = NULL;
|
|
systab.std_err = NULL;
|
|
systab.boottime = NULL;
|
|
|
|
/* Recalculate CRC32 */
|
|
efi_update_table_header_crc32(&systab.hdr);
|
|
|
|
/* Give the payload some time to boot */
|
|
efi_set_watchdog(0);
|
|
schedule();
|
|
out:
|
|
if (IS_ENABLED(CONFIG_EFI_TCG2_PROTOCOL)) {
|
|
if (ret != EFI_SUCCESS)
|
|
efi_tcg2_notify_exit_boot_services_failed();
|
|
}
|
|
|
|
return EFI_EXIT(ret);
|
|
}
|
|
|
|
/**
|
|
* efi_get_next_monotonic_count() - get next value of the counter
|
|
* @count: returned value of the counter
|
|
*
|
|
* This function implements the NextMonotonicCount service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t EFIAPI efi_get_next_monotonic_count(uint64_t *count)
|
|
{
|
|
static uint64_t mono;
|
|
efi_status_t ret;
|
|
|
|
EFI_ENTRY("%p", count);
|
|
if (!count) {
|
|
ret = EFI_INVALID_PARAMETER;
|
|
goto out;
|
|
}
|
|
*count = mono++;
|
|
ret = EFI_SUCCESS;
|
|
out:
|
|
return EFI_EXIT(ret);
|
|
}
|
|
|
|
/**
|
|
* efi_stall() - sleep
|
|
* @microseconds: period to sleep in microseconds
|
|
*
|
|
* This function implements the Stall service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t EFIAPI efi_stall(unsigned long microseconds)
|
|
{
|
|
u64 end_tick;
|
|
|
|
EFI_ENTRY("%ld", microseconds);
|
|
|
|
end_tick = get_ticks() + usec_to_tick(microseconds);
|
|
while (get_ticks() < end_tick)
|
|
efi_timer_check();
|
|
|
|
return EFI_EXIT(EFI_SUCCESS);
|
|
}
|
|
|
|
/**
|
|
* efi_set_watchdog_timer() - reset the watchdog timer
|
|
* @timeout: seconds before reset by watchdog
|
|
* @watchdog_code: code to be logged when resetting
|
|
* @data_size: size of buffer in bytes
|
|
* @watchdog_data: buffer with data describing the reset reason
|
|
*
|
|
* This function implements the SetWatchdogTimer service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t EFIAPI efi_set_watchdog_timer(unsigned long timeout,
|
|
uint64_t watchdog_code,
|
|
unsigned long data_size,
|
|
uint16_t *watchdog_data)
|
|
{
|
|
EFI_ENTRY("%ld, 0x%llx, %ld, %p", timeout, watchdog_code,
|
|
data_size, watchdog_data);
|
|
return EFI_EXIT(efi_set_watchdog(timeout));
|
|
}
|
|
|
|
/**
|
|
* efi_close_protocol() - close a protocol
|
|
* @handle: handle on which the protocol shall be closed
|
|
* @protocol: GUID of the protocol to close
|
|
* @agent_handle: handle of the driver
|
|
* @controller_handle: handle of the controller
|
|
*
|
|
* This is the function implementing the CloseProtocol service is for internal
|
|
* usage in U-Boot. For API usage wrapper efi_close_protocol_ext() is provided.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
efi_status_t efi_close_protocol(efi_handle_t handle, const efi_guid_t *protocol,
|
|
efi_handle_t agent_handle,
|
|
efi_handle_t controller_handle)
|
|
{
|
|
struct efi_handler *handler;
|
|
struct efi_open_protocol_info_item *item;
|
|
struct efi_open_protocol_info_item *pos;
|
|
efi_status_t ret;
|
|
|
|
if (!efi_search_obj(agent_handle) ||
|
|
(controller_handle && !efi_search_obj(controller_handle)))
|
|
return EFI_INVALID_PARAMETER;
|
|
ret = efi_search_protocol(handle, protocol, &handler);
|
|
if (ret != EFI_SUCCESS)
|
|
return ret;
|
|
|
|
ret = EFI_NOT_FOUND;
|
|
list_for_each_entry_safe(item, pos, &handler->open_infos, link) {
|
|
if (item->info.agent_handle == agent_handle &&
|
|
item->info.controller_handle == controller_handle) {
|
|
efi_delete_open_info(item);
|
|
ret = EFI_SUCCESS;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* efi_close_protocol_ext() - close a protocol
|
|
* @handle: handle on which the protocol shall be closed
|
|
* @protocol: GUID of the protocol to close
|
|
* @agent_handle: handle of the driver
|
|
* @controller_handle: handle of the controller
|
|
*
|
|
* This function implements the CloseProtocol service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t EFIAPI
|
|
efi_close_protocol_ext(efi_handle_t handle, const efi_guid_t *protocol,
|
|
efi_handle_t agent_handle,
|
|
efi_handle_t controller_handle)
|
|
{
|
|
efi_status_t ret;
|
|
|
|
EFI_ENTRY("%p, %pUs, %p, %p", handle, protocol, agent_handle,
|
|
controller_handle);
|
|
|
|
ret = efi_close_protocol(handle, protocol,
|
|
agent_handle, controller_handle);
|
|
|
|
return EFI_EXIT(ret);
|
|
}
|
|
|
|
/**
|
|
* efi_open_protocol_information() - provide information about then open status
|
|
* of a protocol on a handle
|
|
* @handle: handle for which the information shall be retrieved
|
|
* @protocol: GUID of the protocol
|
|
* @entry_buffer: buffer to receive the open protocol information
|
|
* @entry_count: number of entries available in the buffer
|
|
*
|
|
* This function implements the OpenProtocolInformation service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t EFIAPI efi_open_protocol_information(
|
|
efi_handle_t handle, const efi_guid_t *protocol,
|
|
struct efi_open_protocol_info_entry **entry_buffer,
|
|
efi_uintn_t *entry_count)
|
|
{
|
|
unsigned long buffer_size;
|
|
unsigned long count;
|
|
struct efi_handler *handler;
|
|
struct efi_open_protocol_info_item *item;
|
|
efi_status_t r;
|
|
|
|
EFI_ENTRY("%p, %pUs, %p, %p", handle, protocol, entry_buffer,
|
|
entry_count);
|
|
|
|
/* Check parameters */
|
|
if (!entry_buffer) {
|
|
r = EFI_INVALID_PARAMETER;
|
|
goto out;
|
|
}
|
|
r = efi_search_protocol(handle, protocol, &handler);
|
|
if (r != EFI_SUCCESS)
|
|
goto out;
|
|
|
|
/* Count entries */
|
|
count = 0;
|
|
list_for_each_entry(item, &handler->open_infos, link) {
|
|
if (item->info.open_count)
|
|
++count;
|
|
}
|
|
*entry_count = count;
|
|
*entry_buffer = NULL;
|
|
if (!count) {
|
|
r = EFI_SUCCESS;
|
|
goto out;
|
|
}
|
|
|
|
/* Copy entries */
|
|
buffer_size = count * sizeof(struct efi_open_protocol_info_entry);
|
|
r = efi_allocate_pool(EFI_BOOT_SERVICES_DATA, buffer_size,
|
|
(void **)entry_buffer);
|
|
if (r != EFI_SUCCESS)
|
|
goto out;
|
|
list_for_each_entry_reverse(item, &handler->open_infos, link) {
|
|
if (item->info.open_count)
|
|
(*entry_buffer)[--count] = item->info;
|
|
}
|
|
out:
|
|
return EFI_EXIT(r);
|
|
}
|
|
|
|
/**
|
|
* efi_protocols_per_handle() - get protocols installed on a handle
|
|
* @handle: handle for which the information is retrieved
|
|
* @protocol_buffer: buffer with protocol GUIDs
|
|
* @protocol_buffer_count: number of entries in the buffer
|
|
*
|
|
* This function implements the ProtocolsPerHandleService.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t EFIAPI efi_protocols_per_handle(
|
|
efi_handle_t handle, efi_guid_t ***protocol_buffer,
|
|
efi_uintn_t *protocol_buffer_count)
|
|
{
|
|
unsigned long buffer_size;
|
|
struct efi_object *efiobj;
|
|
struct list_head *protocol_handle;
|
|
efi_status_t r;
|
|
|
|
EFI_ENTRY("%p, %p, %p", handle, protocol_buffer,
|
|
protocol_buffer_count);
|
|
|
|
if (!handle || !protocol_buffer || !protocol_buffer_count)
|
|
return EFI_EXIT(EFI_INVALID_PARAMETER);
|
|
|
|
*protocol_buffer = NULL;
|
|
|
|
efiobj = efi_search_obj(handle);
|
|
if (!efiobj)
|
|
return EFI_EXIT(EFI_INVALID_PARAMETER);
|
|
|
|
*protocol_buffer_count = list_count_nodes(&efiobj->protocols);
|
|
|
|
/* Copy GUIDs */
|
|
if (*protocol_buffer_count) {
|
|
size_t j = 0;
|
|
|
|
buffer_size = sizeof(efi_guid_t *) * *protocol_buffer_count;
|
|
r = efi_allocate_pool(EFI_BOOT_SERVICES_DATA, buffer_size,
|
|
(void **)protocol_buffer);
|
|
if (r != EFI_SUCCESS)
|
|
return EFI_EXIT(r);
|
|
list_for_each(protocol_handle, &efiobj->protocols) {
|
|
struct efi_handler *protocol;
|
|
|
|
protocol = list_entry(protocol_handle,
|
|
struct efi_handler, link);
|
|
(*protocol_buffer)[j] = (void *)&protocol->guid;
|
|
++j;
|
|
}
|
|
}
|
|
|
|
return EFI_EXIT(EFI_SUCCESS);
|
|
}
|
|
|
|
efi_status_t efi_locate_handle_buffer_int(enum efi_locate_search_type search_type,
|
|
const efi_guid_t *protocol, void *search_key,
|
|
efi_uintn_t *no_handles, efi_handle_t **buffer)
|
|
{
|
|
efi_status_t r;
|
|
efi_uintn_t buffer_size = 0;
|
|
|
|
if (!no_handles || !buffer) {
|
|
r = EFI_INVALID_PARAMETER;
|
|
goto out;
|
|
}
|
|
*no_handles = 0;
|
|
*buffer = NULL;
|
|
r = efi_locate_handle(search_type, protocol, search_key, &buffer_size,
|
|
*buffer);
|
|
if (r != EFI_BUFFER_TOO_SMALL)
|
|
goto out;
|
|
r = efi_allocate_pool(EFI_BOOT_SERVICES_DATA, buffer_size,
|
|
(void **)buffer);
|
|
if (r != EFI_SUCCESS)
|
|
goto out;
|
|
r = efi_locate_handle(search_type, protocol, search_key, &buffer_size,
|
|
*buffer);
|
|
if (r == EFI_SUCCESS)
|
|
*no_handles = buffer_size / sizeof(efi_handle_t);
|
|
out:
|
|
return r;
|
|
}
|
|
|
|
/**
|
|
* efi_locate_handle_buffer() - locate handles implementing a protocol
|
|
* @search_type: selection criterion
|
|
* @protocol: GUID of the protocol
|
|
* @search_key: registration key
|
|
* @no_handles: number of returned handles
|
|
* @buffer: buffer with the returned handles
|
|
*
|
|
* This function implements the LocateHandleBuffer service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
efi_status_t EFIAPI efi_locate_handle_buffer(
|
|
enum efi_locate_search_type search_type,
|
|
const efi_guid_t *protocol, void *search_key,
|
|
efi_uintn_t *no_handles, efi_handle_t **buffer)
|
|
{
|
|
efi_status_t r;
|
|
|
|
EFI_ENTRY("%d, %pUs, %p, %p, %p", search_type, protocol, search_key,
|
|
no_handles, buffer);
|
|
|
|
r = efi_locate_handle_buffer_int(search_type, protocol, search_key,
|
|
no_handles, buffer);
|
|
|
|
return EFI_EXIT(r);
|
|
}
|
|
|
|
/**
|
|
* efi_locate_protocol() - find an interface implementing a protocol
|
|
* @protocol: GUID of the protocol
|
|
* @registration: registration key passed to the notification function
|
|
* @protocol_interface: interface implementing the protocol
|
|
*
|
|
* This function implements the LocateProtocol service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t EFIAPI efi_locate_protocol(const efi_guid_t *protocol,
|
|
void *registration,
|
|
void **protocol_interface)
|
|
{
|
|
struct efi_handler *handler;
|
|
efi_status_t ret;
|
|
struct efi_object *efiobj;
|
|
|
|
EFI_ENTRY("%pUs, %p, %p", protocol, registration, protocol_interface);
|
|
|
|
/*
|
|
* The UEFI spec explicitly requires a protocol even if a registration
|
|
* key is provided. This differs from the logic in LocateHandle().
|
|
*/
|
|
if (!protocol || !protocol_interface)
|
|
return EFI_EXIT(EFI_INVALID_PARAMETER);
|
|
|
|
if (registration) {
|
|
struct efi_register_notify_event *event;
|
|
struct efi_protocol_notification *handle;
|
|
|
|
event = efi_check_register_notify_event(registration);
|
|
if (!event)
|
|
return EFI_EXIT(EFI_INVALID_PARAMETER);
|
|
/*
|
|
* The UEFI spec requires to return EFI_NOT_FOUND if no
|
|
* protocol instance matches protocol and registration.
|
|
* So let's do the same for a mismatch between protocol and
|
|
* registration.
|
|
*/
|
|
if (guidcmp(&event->protocol, protocol))
|
|
goto not_found;
|
|
if (list_empty(&event->handles))
|
|
goto not_found;
|
|
handle = list_first_entry(&event->handles,
|
|
struct efi_protocol_notification,
|
|
link);
|
|
efiobj = handle->handle;
|
|
list_del(&handle->link);
|
|
free(handle);
|
|
ret = efi_search_protocol(efiobj, protocol, &handler);
|
|
if (ret == EFI_SUCCESS)
|
|
goto found;
|
|
} else {
|
|
list_for_each_entry(efiobj, &efi_obj_list, link) {
|
|
ret = efi_search_protocol(efiobj, protocol, &handler);
|
|
if (ret == EFI_SUCCESS)
|
|
goto found;
|
|
}
|
|
}
|
|
not_found:
|
|
*protocol_interface = NULL;
|
|
return EFI_EXIT(EFI_NOT_FOUND);
|
|
found:
|
|
*protocol_interface = handler->protocol_interface;
|
|
return EFI_EXIT(EFI_SUCCESS);
|
|
}
|
|
|
|
/**
|
|
* efi_install_multiple_protocol_interfaces_int() - Install multiple protocol
|
|
* interfaces
|
|
* @handle: handle on which the protocol interfaces shall be installed
|
|
* @argptr: va_list of args
|
|
*
|
|
* Core functionality of efi_install_multiple_protocol_interfaces
|
|
* Must not be called directly
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t EFIAPI
|
|
efi_install_multiple_protocol_interfaces_int(efi_handle_t *handle,
|
|
efi_va_list argptr)
|
|
{
|
|
const efi_guid_t *protocol;
|
|
void *protocol_interface;
|
|
efi_handle_t old_handle;
|
|
efi_status_t ret = EFI_SUCCESS;
|
|
int i = 0;
|
|
efi_va_list argptr_copy;
|
|
|
|
if (!handle)
|
|
return EFI_INVALID_PARAMETER;
|
|
|
|
efi_va_copy(argptr_copy, argptr);
|
|
for (;;) {
|
|
protocol = efi_va_arg(argptr, efi_guid_t*);
|
|
if (!protocol)
|
|
break;
|
|
protocol_interface = efi_va_arg(argptr, void*);
|
|
/* Check that a device path has not been installed before */
|
|
if (!guidcmp(protocol, &efi_guid_device_path)) {
|
|
struct efi_device_path *dp = protocol_interface;
|
|
|
|
ret = EFI_CALL(efi_locate_device_path(protocol, &dp,
|
|
&old_handle));
|
|
if (ret == EFI_SUCCESS &&
|
|
dp->type == DEVICE_PATH_TYPE_END) {
|
|
EFI_PRINT("Path %pD already installed\n",
|
|
protocol_interface);
|
|
ret = EFI_ALREADY_STARTED;
|
|
break;
|
|
}
|
|
}
|
|
ret = EFI_CALL(efi_install_protocol_interface(handle, protocol,
|
|
EFI_NATIVE_INTERFACE,
|
|
protocol_interface));
|
|
if (ret != EFI_SUCCESS)
|
|
break;
|
|
i++;
|
|
}
|
|
if (ret == EFI_SUCCESS)
|
|
goto out;
|
|
|
|
/* If an error occurred undo all changes. */
|
|
for (; i; --i) {
|
|
protocol = efi_va_arg(argptr_copy, efi_guid_t*);
|
|
protocol_interface = efi_va_arg(argptr_copy, void*);
|
|
EFI_CALL(efi_uninstall_protocol_interface(*handle, protocol,
|
|
protocol_interface));
|
|
}
|
|
|
|
out:
|
|
efi_va_end(argptr_copy);
|
|
return ret;
|
|
|
|
}
|
|
|
|
/**
|
|
* efi_install_multiple_protocol_interfaces() - Install multiple protocol
|
|
* interfaces
|
|
* @handle: handle on which the protocol interfaces shall be installed
|
|
* @...: NULL terminated argument list with pairs of protocol GUIDS and
|
|
* interfaces
|
|
*
|
|
*
|
|
* This is the function for internal usage in U-Boot. For the API function
|
|
* implementing the InstallMultipleProtocol service see
|
|
* efi_install_multiple_protocol_interfaces_ext()
|
|
*
|
|
* Return: status code
|
|
*/
|
|
efi_status_t EFIAPI
|
|
efi_install_multiple_protocol_interfaces(efi_handle_t *handle, ...)
|
|
{
|
|
efi_status_t ret;
|
|
efi_va_list argptr;
|
|
|
|
efi_va_start(argptr, handle);
|
|
ret = efi_install_multiple_protocol_interfaces_int(handle, argptr);
|
|
efi_va_end(argptr);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* efi_install_multiple_protocol_interfaces_ext() - Install multiple protocol
|
|
* interfaces
|
|
* @handle: handle on which the protocol interfaces shall be installed
|
|
* @...: NULL terminated argument list with pairs of protocol GUIDS and
|
|
* interfaces
|
|
*
|
|
* This function implements the MultipleProtocolInterfaces service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t EFIAPI
|
|
efi_install_multiple_protocol_interfaces_ext(efi_handle_t *handle, ...)
|
|
{
|
|
EFI_ENTRY("%p", handle);
|
|
efi_status_t ret;
|
|
efi_va_list argptr;
|
|
|
|
efi_va_start(argptr, handle);
|
|
ret = efi_install_multiple_protocol_interfaces_int(handle, argptr);
|
|
efi_va_end(argptr);
|
|
return EFI_EXIT(ret);
|
|
}
|
|
|
|
/**
|
|
* efi_uninstall_multiple_protocol_interfaces_int() - wrapper for uninstall
|
|
* multiple protocol
|
|
* interfaces
|
|
* @handle: handle from which the protocol interfaces shall be removed
|
|
* @argptr: va_list of args
|
|
*
|
|
* Core functionality of efi_uninstall_multiple_protocol_interfaces
|
|
* Must not be called directly
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t EFIAPI
|
|
efi_uninstall_multiple_protocol_interfaces_int(efi_handle_t handle,
|
|
efi_va_list argptr)
|
|
{
|
|
const efi_guid_t *protocol, *next_protocol;
|
|
void *protocol_interface;
|
|
efi_status_t ret = EFI_SUCCESS;
|
|
size_t i = 0;
|
|
efi_va_list argptr_copy;
|
|
|
|
if (!handle)
|
|
return EFI_INVALID_PARAMETER;
|
|
|
|
efi_va_copy(argptr_copy, argptr);
|
|
protocol = efi_va_arg(argptr, efi_guid_t*);
|
|
for (;;) {
|
|
/*
|
|
* If efi_uninstall_protocol() fails we need to be able to
|
|
* reinstall the previously uninstalled protocols on the same
|
|
* handle.
|
|
* Instead of calling efi_uninstall_protocol(...,..., false)
|
|
* and potentially removing the handle, only allow the handle
|
|
* removal on the last protocol that we requested to uninstall.
|
|
* That way we can preserve the handle in case the latter fails
|
|
*/
|
|
bool preserve = true;
|
|
|
|
if (!protocol)
|
|
break;
|
|
protocol_interface = efi_va_arg(argptr, void*);
|
|
next_protocol = efi_va_arg(argptr, efi_guid_t*);
|
|
if (!next_protocol)
|
|
preserve = false;
|
|
ret = efi_uninstall_protocol(handle, protocol,
|
|
protocol_interface, preserve);
|
|
if (ret != EFI_SUCCESS)
|
|
break;
|
|
i++;
|
|
protocol = next_protocol;
|
|
}
|
|
if (ret == EFI_SUCCESS)
|
|
goto out;
|
|
|
|
/* If an error occurred undo all changes. */
|
|
for (; i; --i) {
|
|
protocol = efi_va_arg(argptr_copy, efi_guid_t*);
|
|
protocol_interface = efi_va_arg(argptr_copy, void*);
|
|
EFI_CALL(efi_install_protocol_interface(&handle, protocol,
|
|
EFI_NATIVE_INTERFACE,
|
|
protocol_interface));
|
|
}
|
|
/*
|
|
* If any errors are generated while the protocol interfaces are being
|
|
* uninstalled, then the protocols uninstalled prior to the error will
|
|
* be reinstalled using InstallProtocolInterface() and the status code
|
|
* EFI_INVALID_PARAMETER is returned.
|
|
*/
|
|
ret = EFI_INVALID_PARAMETER;
|
|
|
|
out:
|
|
efi_va_end(argptr_copy);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* efi_uninstall_multiple_protocol_interfaces() - uninstall multiple protocol
|
|
* interfaces
|
|
* @handle: handle from which the protocol interfaces shall be removed
|
|
* @...: NULL terminated argument list with pairs of protocol GUIDS and
|
|
* interfaces
|
|
*
|
|
* This function implements the UninstallMultipleProtocolInterfaces service.
|
|
*
|
|
* This is the function for internal usage in U-Boot. For the API function
|
|
* implementing the UninstallMultipleProtocolInterfaces service see
|
|
* efi_uninstall_multiple_protocol_interfaces_ext()
|
|
*
|
|
* Return: status code
|
|
*/
|
|
efi_status_t EFIAPI
|
|
efi_uninstall_multiple_protocol_interfaces(efi_handle_t handle, ...)
|
|
{
|
|
efi_status_t ret;
|
|
efi_va_list argptr;
|
|
|
|
efi_va_start(argptr, handle);
|
|
ret = efi_uninstall_multiple_protocol_interfaces_int(handle, argptr);
|
|
efi_va_end(argptr);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* efi_uninstall_multiple_protocol_interfaces_ext() - uninstall multiple protocol
|
|
* interfaces
|
|
* @handle: handle from which the protocol interfaces shall be removed
|
|
* @...: NULL terminated argument list with pairs of protocol GUIDS and
|
|
* interfaces
|
|
*
|
|
* This function implements the UninstallMultipleProtocolInterfaces service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t EFIAPI
|
|
efi_uninstall_multiple_protocol_interfaces_ext(efi_handle_t handle, ...)
|
|
{
|
|
EFI_ENTRY("%p", handle);
|
|
efi_status_t ret;
|
|
efi_va_list argptr;
|
|
|
|
efi_va_start(argptr, handle);
|
|
ret = efi_uninstall_multiple_protocol_interfaces_int(handle, argptr);
|
|
efi_va_end(argptr);
|
|
return EFI_EXIT(ret);
|
|
}
|
|
|
|
/**
|
|
* efi_calculate_crc32() - calculate cyclic redundancy code
|
|
* @data: buffer with data
|
|
* @data_size: size of buffer in bytes
|
|
* @crc32_p: cyclic redundancy code
|
|
*
|
|
* This function implements the CalculateCrc32 service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t EFIAPI efi_calculate_crc32(const void *data,
|
|
efi_uintn_t data_size,
|
|
u32 *crc32_p)
|
|
{
|
|
efi_status_t ret = EFI_SUCCESS;
|
|
|
|
EFI_ENTRY("%p, %zu", data, data_size);
|
|
if (!data || !data_size || !crc32_p) {
|
|
ret = EFI_INVALID_PARAMETER;
|
|
goto out;
|
|
}
|
|
*crc32_p = crc32(0, data, data_size);
|
|
out:
|
|
return EFI_EXIT(ret);
|
|
}
|
|
|
|
/**
|
|
* efi_copy_mem() - copy memory
|
|
* @destination: destination of the copy operation
|
|
* @source: source of the copy operation
|
|
* @length: number of bytes to copy
|
|
*
|
|
* This function implements the CopyMem service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*/
|
|
static void EFIAPI efi_copy_mem(void *destination, const void *source,
|
|
size_t length)
|
|
{
|
|
EFI_ENTRY("%p, %p, %ld", destination, source, (unsigned long)length);
|
|
memmove(destination, source, length);
|
|
EFI_EXIT(EFI_SUCCESS);
|
|
}
|
|
|
|
/**
|
|
* efi_set_mem() - Fill memory with a byte value.
|
|
* @buffer: buffer to fill
|
|
* @size: size of buffer in bytes
|
|
* @value: byte to copy to the buffer
|
|
*
|
|
* This function implements the SetMem service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*/
|
|
static void EFIAPI efi_set_mem(void *buffer, size_t size, uint8_t value)
|
|
{
|
|
EFI_ENTRY("%p, %ld, 0x%x", buffer, (unsigned long)size, value);
|
|
memset(buffer, value, size);
|
|
EFI_EXIT(EFI_SUCCESS);
|
|
}
|
|
|
|
/**
|
|
* efi_protocol_open() - open protocol interface on a handle
|
|
* @handler: handler of a protocol
|
|
* @protocol_interface: interface implementing the protocol
|
|
* @agent_handle: handle of the driver
|
|
* @controller_handle: handle of the controller
|
|
* @attributes: attributes indicating how to open the protocol
|
|
*
|
|
* Return: status code
|
|
*/
|
|
efi_status_t efi_protocol_open(
|
|
struct efi_handler *handler,
|
|
void **protocol_interface, void *agent_handle,
|
|
void *controller_handle, uint32_t attributes)
|
|
{
|
|
struct efi_open_protocol_info_item *item;
|
|
struct efi_open_protocol_info_entry *match = NULL;
|
|
bool opened_by_driver = false;
|
|
bool opened_exclusive = false;
|
|
|
|
/* If there is no agent, only return the interface */
|
|
if (!agent_handle)
|
|
goto out;
|
|
|
|
/* For TEST_PROTOCOL ignore interface attribute */
|
|
if (attributes != EFI_OPEN_PROTOCOL_TEST_PROTOCOL)
|
|
*protocol_interface = NULL;
|
|
|
|
/*
|
|
* Check if the protocol is already opened by a driver with the same
|
|
* attributes or opened exclusively
|
|
*/
|
|
list_for_each_entry(item, &handler->open_infos, link) {
|
|
if (item->info.agent_handle == agent_handle) {
|
|
if ((attributes & EFI_OPEN_PROTOCOL_BY_DRIVER) &&
|
|
(item->info.attributes == attributes))
|
|
return EFI_ALREADY_STARTED;
|
|
} else {
|
|
if (item->info.attributes &
|
|
EFI_OPEN_PROTOCOL_BY_DRIVER)
|
|
opened_by_driver = true;
|
|
}
|
|
if (item->info.attributes & EFI_OPEN_PROTOCOL_EXCLUSIVE)
|
|
opened_exclusive = true;
|
|
}
|
|
|
|
/* Only one controller can open the protocol exclusively */
|
|
if (attributes & EFI_OPEN_PROTOCOL_EXCLUSIVE) {
|
|
if (opened_exclusive)
|
|
return EFI_ACCESS_DENIED;
|
|
} else if (attributes & EFI_OPEN_PROTOCOL_BY_DRIVER) {
|
|
if (opened_exclusive || opened_by_driver)
|
|
return EFI_ACCESS_DENIED;
|
|
}
|
|
|
|
/* Prepare exclusive opening */
|
|
if (attributes & EFI_OPEN_PROTOCOL_EXCLUSIVE) {
|
|
/* Try to disconnect controllers */
|
|
disconnect_next:
|
|
opened_by_driver = false;
|
|
list_for_each_entry(item, &handler->open_infos, link) {
|
|
efi_status_t ret;
|
|
|
|
if (item->info.attributes ==
|
|
EFI_OPEN_PROTOCOL_BY_DRIVER) {
|
|
ret = EFI_CALL(efi_disconnect_controller(
|
|
item->info.controller_handle,
|
|
item->info.agent_handle,
|
|
NULL));
|
|
if (ret == EFI_SUCCESS)
|
|
/*
|
|
* Child controllers may have been
|
|
* removed from the open_infos list. So
|
|
* let's restart the loop.
|
|
*/
|
|
goto disconnect_next;
|
|
else
|
|
opened_by_driver = true;
|
|
}
|
|
}
|
|
/* Only one driver can be connected */
|
|
if (opened_by_driver)
|
|
return EFI_ACCESS_DENIED;
|
|
}
|
|
|
|
/* Find existing entry */
|
|
list_for_each_entry(item, &handler->open_infos, link) {
|
|
if (item->info.agent_handle == agent_handle &&
|
|
item->info.controller_handle == controller_handle &&
|
|
item->info.attributes == attributes)
|
|
match = &item->info;
|
|
}
|
|
/* None found, create one */
|
|
if (!match) {
|
|
match = efi_create_open_info(handler);
|
|
if (!match)
|
|
return EFI_OUT_OF_RESOURCES;
|
|
}
|
|
|
|
match->agent_handle = agent_handle;
|
|
match->controller_handle = controller_handle;
|
|
match->attributes = attributes;
|
|
match->open_count++;
|
|
|
|
out:
|
|
/* For TEST_PROTOCOL ignore interface attribute. */
|
|
if (attributes != EFI_OPEN_PROTOCOL_TEST_PROTOCOL)
|
|
*protocol_interface = handler->protocol_interface;
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* efi_open_protocol() - open protocol interface on a handle
|
|
* @handle: handle on which the protocol shall be opened
|
|
* @protocol: GUID of the protocol
|
|
* @protocol_interface: interface implementing the protocol
|
|
* @agent_handle: handle of the driver
|
|
* @controller_handle: handle of the controller
|
|
* @attributes: attributes indicating how to open the protocol
|
|
*
|
|
* This function implements the OpenProtocol interface.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t EFIAPI efi_open_protocol
|
|
(efi_handle_t handle, const efi_guid_t *protocol,
|
|
void **protocol_interface, efi_handle_t agent_handle,
|
|
efi_handle_t controller_handle, uint32_t attributes)
|
|
{
|
|
struct efi_handler *handler;
|
|
efi_status_t r = EFI_INVALID_PARAMETER;
|
|
|
|
EFI_ENTRY("%p, %pUs, %p, %p, %p, 0x%x", handle, protocol,
|
|
protocol_interface, agent_handle, controller_handle,
|
|
attributes);
|
|
|
|
if (!handle || !protocol ||
|
|
(!protocol_interface && attributes !=
|
|
EFI_OPEN_PROTOCOL_TEST_PROTOCOL)) {
|
|
goto out;
|
|
}
|
|
|
|
switch (attributes) {
|
|
case EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL:
|
|
case EFI_OPEN_PROTOCOL_GET_PROTOCOL:
|
|
case EFI_OPEN_PROTOCOL_TEST_PROTOCOL:
|
|
break;
|
|
case EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER:
|
|
if (controller_handle == handle)
|
|
goto out;
|
|
/* fall-through */
|
|
case EFI_OPEN_PROTOCOL_BY_DRIVER:
|
|
case EFI_OPEN_PROTOCOL_BY_DRIVER | EFI_OPEN_PROTOCOL_EXCLUSIVE:
|
|
/* Check that the controller handle is valid */
|
|
if (!efi_search_obj(controller_handle))
|
|
goto out;
|
|
/* fall-through */
|
|
case EFI_OPEN_PROTOCOL_EXCLUSIVE:
|
|
/* Check that the agent handle is valid */
|
|
if (!efi_search_obj(agent_handle))
|
|
goto out;
|
|
break;
|
|
default:
|
|
goto out;
|
|
}
|
|
|
|
r = efi_search_protocol(handle, protocol, &handler);
|
|
switch (r) {
|
|
case EFI_SUCCESS:
|
|
break;
|
|
case EFI_NOT_FOUND:
|
|
r = EFI_UNSUPPORTED;
|
|
goto out;
|
|
default:
|
|
goto out;
|
|
}
|
|
|
|
r = efi_protocol_open(handler, protocol_interface, agent_handle,
|
|
controller_handle, attributes);
|
|
out:
|
|
return EFI_EXIT(r);
|
|
}
|
|
|
|
/**
|
|
* efi_start_image() - call the entry point of an image
|
|
* @image_handle: handle of the image
|
|
* @exit_data_size: size of the buffer
|
|
* @exit_data: buffer to receive the exit data of the called image
|
|
*
|
|
* This function implements the StartImage service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
|
|
efi_uintn_t *exit_data_size,
|
|
u16 **exit_data)
|
|
{
|
|
struct efi_loaded_image_obj *image_obj =
|
|
(struct efi_loaded_image_obj *)image_handle;
|
|
efi_status_t ret;
|
|
void *info;
|
|
efi_handle_t parent_image = current_image;
|
|
efi_status_t exit_status;
|
|
struct jmp_buf_data exit_jmp;
|
|
|
|
EFI_ENTRY("%p, %p, %p", image_handle, exit_data_size, exit_data);
|
|
|
|
if (!efi_search_obj(image_handle))
|
|
return EFI_EXIT(EFI_INVALID_PARAMETER);
|
|
|
|
/* Check parameters */
|
|
if (image_obj->header.type != EFI_OBJECT_TYPE_LOADED_IMAGE)
|
|
return EFI_EXIT(EFI_INVALID_PARAMETER);
|
|
|
|
if (image_obj->auth_status != EFI_IMAGE_AUTH_PASSED)
|
|
return EFI_EXIT(EFI_SECURITY_VIOLATION);
|
|
|
|
ret = EFI_CALL(efi_open_protocol(image_handle, &efi_guid_loaded_image,
|
|
&info, NULL, NULL,
|
|
EFI_OPEN_PROTOCOL_GET_PROTOCOL));
|
|
if (ret != EFI_SUCCESS)
|
|
return EFI_EXIT(EFI_INVALID_PARAMETER);
|
|
|
|
image_obj->exit_data_size = exit_data_size;
|
|
image_obj->exit_data = exit_data;
|
|
image_obj->exit_status = &exit_status;
|
|
image_obj->exit_jmp = &exit_jmp;
|
|
|
|
if (IS_ENABLED(CONFIG_EFI_TCG2_PROTOCOL)) {
|
|
if (image_obj->image_type == IMAGE_SUBSYSTEM_EFI_APPLICATION) {
|
|
ret = efi_tcg2_measure_efi_app_invocation(image_obj);
|
|
if (ret == EFI_SECURITY_VIOLATION) {
|
|
/*
|
|
* TCG2 Protocol is installed but no TPM device found,
|
|
* this is not expected.
|
|
*/
|
|
return EFI_EXIT(EFI_SECURITY_VIOLATION);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* call the image! */
|
|
if (setjmp(&exit_jmp)) {
|
|
/*
|
|
* We called the entry point of the child image with EFI_CALL
|
|
* in the lines below. The child image called the Exit() boot
|
|
* service efi_exit() which executed the long jump that brought
|
|
* us to the current line. This implies that the second half
|
|
* of the EFI_CALL macro has not been executed.
|
|
*/
|
|
#if defined(CONFIG_ARM) || defined(CONFIG_RISCV)
|
|
/*
|
|
* efi_exit() called efi_restore_gd(). We have to undo this
|
|
* otherwise __efi_entry_check() will put the wrong value into
|
|
* app_gd.
|
|
*/
|
|
set_gd(app_gd);
|
|
#endif
|
|
/*
|
|
* To get ready to call EFI_EXIT below we have to execute the
|
|
* missed out steps of EFI_CALL.
|
|
*/
|
|
assert(__efi_entry_check());
|
|
EFI_PRINT("%lu returned by started image\n",
|
|
(unsigned long)((uintptr_t)exit_status &
|
|
~EFI_ERROR_MASK));
|
|
current_image = parent_image;
|
|
return EFI_EXIT(exit_status);
|
|
}
|
|
|
|
current_image = image_handle;
|
|
image_obj->header.type = EFI_OBJECT_TYPE_STARTED_IMAGE;
|
|
EFI_PRINT("Jumping into 0x%p\n", image_obj->entry);
|
|
ret = EFI_CALL(image_obj->entry(image_handle, &systab));
|
|
|
|
/*
|
|
* Control is returned from a started UEFI image either by calling
|
|
* Exit() (where exit data can be provided) or by simply returning from
|
|
* the entry point. In the latter case call Exit() on behalf of the
|
|
* image.
|
|
*/
|
|
return EFI_CALL(systab.boottime->exit(image_handle, ret, 0, NULL));
|
|
}
|
|
|
|
/**
|
|
* efi_delete_image() - delete loaded image from memory)
|
|
*
|
|
* @image_obj: handle of the loaded image
|
|
* @loaded_image_protocol: loaded image protocol
|
|
*/
|
|
static efi_status_t efi_delete_image
|
|
(struct efi_loaded_image_obj *image_obj,
|
|
struct efi_loaded_image *loaded_image_protocol)
|
|
{
|
|
struct efi_object *efiobj;
|
|
efi_status_t r, ret = EFI_SUCCESS;
|
|
|
|
close_next:
|
|
list_for_each_entry(efiobj, &efi_obj_list, link) {
|
|
struct efi_handler *protocol;
|
|
|
|
list_for_each_entry(protocol, &efiobj->protocols, link) {
|
|
struct efi_open_protocol_info_item *info;
|
|
|
|
list_for_each_entry(info, &protocol->open_infos, link) {
|
|
if (info->info.agent_handle !=
|
|
(efi_handle_t)image_obj)
|
|
continue;
|
|
r = efi_close_protocol(
|
|
efiobj, &protocol->guid,
|
|
info->info.agent_handle,
|
|
info->info.controller_handle);
|
|
if (r != EFI_SUCCESS)
|
|
ret = r;
|
|
/*
|
|
* Closing protocols may results in further
|
|
* items being deleted. To play it safe loop
|
|
* over all elements again.
|
|
*/
|
|
goto close_next;
|
|
}
|
|
}
|
|
}
|
|
|
|
efi_free_pages((uintptr_t)loaded_image_protocol->image_base,
|
|
efi_size_in_pages(loaded_image_protocol->image_size));
|
|
efi_delete_handle(&image_obj->header);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* efi_unload_image() - unload an EFI image
|
|
* @image_handle: handle of the image to be unloaded
|
|
*
|
|
* This function implements the UnloadImage service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
efi_status_t EFIAPI efi_unload_image(efi_handle_t image_handle)
|
|
{
|
|
efi_status_t ret = EFI_SUCCESS;
|
|
struct efi_object *efiobj;
|
|
struct efi_loaded_image *loaded_image_protocol;
|
|
|
|
EFI_ENTRY("%p", image_handle);
|
|
|
|
efiobj = efi_search_obj(image_handle);
|
|
if (!efiobj) {
|
|
ret = EFI_INVALID_PARAMETER;
|
|
goto out;
|
|
}
|
|
/* Find the loaded image protocol */
|
|
ret = EFI_CALL(efi_open_protocol(image_handle, &efi_guid_loaded_image,
|
|
(void **)&loaded_image_protocol,
|
|
NULL, NULL,
|
|
EFI_OPEN_PROTOCOL_GET_PROTOCOL));
|
|
if (ret != EFI_SUCCESS) {
|
|
ret = EFI_INVALID_PARAMETER;
|
|
goto out;
|
|
}
|
|
switch (efiobj->type) {
|
|
case EFI_OBJECT_TYPE_STARTED_IMAGE:
|
|
/* Call the unload function */
|
|
if (!loaded_image_protocol->unload) {
|
|
ret = EFI_UNSUPPORTED;
|
|
goto out;
|
|
}
|
|
ret = EFI_CALL(loaded_image_protocol->unload(image_handle));
|
|
if (ret != EFI_SUCCESS)
|
|
goto out;
|
|
break;
|
|
case EFI_OBJECT_TYPE_LOADED_IMAGE:
|
|
break;
|
|
default:
|
|
ret = EFI_INVALID_PARAMETER;
|
|
goto out;
|
|
}
|
|
efi_delete_image((struct efi_loaded_image_obj *)efiobj,
|
|
loaded_image_protocol);
|
|
out:
|
|
return EFI_EXIT(ret);
|
|
}
|
|
|
|
/**
|
|
* efi_update_exit_data() - fill exit data parameters of StartImage()
|
|
*
|
|
* @image_obj: image handle
|
|
* @exit_data_size: size of the exit data buffer
|
|
* @exit_data: buffer with data returned by UEFI payload
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t efi_update_exit_data(struct efi_loaded_image_obj *image_obj,
|
|
efi_uintn_t exit_data_size,
|
|
u16 *exit_data)
|
|
{
|
|
efi_status_t ret;
|
|
|
|
/*
|
|
* If exit_data is not provided to StartImage(), exit_data_size must be
|
|
* ignored.
|
|
*/
|
|
if (!image_obj->exit_data)
|
|
return EFI_SUCCESS;
|
|
if (image_obj->exit_data_size)
|
|
*image_obj->exit_data_size = exit_data_size;
|
|
if (exit_data_size && exit_data) {
|
|
ret = efi_allocate_pool(EFI_BOOT_SERVICES_DATA,
|
|
exit_data_size,
|
|
(void **)image_obj->exit_data);
|
|
if (ret != EFI_SUCCESS)
|
|
return ret;
|
|
memcpy(*image_obj->exit_data, exit_data, exit_data_size);
|
|
} else {
|
|
image_obj->exit_data = NULL;
|
|
}
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* efi_exit() - leave an EFI application or driver
|
|
* @image_handle: handle of the application or driver that is exiting
|
|
* @exit_status: status code
|
|
* @exit_data_size: size of the buffer in bytes
|
|
* @exit_data: buffer with data describing an error
|
|
*
|
|
* This function implements the Exit service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t EFIAPI efi_exit(efi_handle_t image_handle,
|
|
efi_status_t exit_status,
|
|
efi_uintn_t exit_data_size,
|
|
u16 *exit_data)
|
|
{
|
|
/*
|
|
* TODO: We should call the unload procedure of the loaded
|
|
* image protocol.
|
|
*/
|
|
efi_status_t ret;
|
|
struct efi_loaded_image *loaded_image_protocol;
|
|
struct efi_loaded_image_obj *image_obj =
|
|
(struct efi_loaded_image_obj *)image_handle;
|
|
struct jmp_buf_data *exit_jmp;
|
|
|
|
EFI_ENTRY("%p, %ld, %zu, %p", image_handle, exit_status,
|
|
exit_data_size, exit_data);
|
|
|
|
/* Check parameters */
|
|
ret = EFI_CALL(efi_open_protocol(image_handle, &efi_guid_loaded_image,
|
|
(void **)&loaded_image_protocol,
|
|
NULL, NULL,
|
|
EFI_OPEN_PROTOCOL_GET_PROTOCOL));
|
|
if (ret != EFI_SUCCESS) {
|
|
ret = EFI_INVALID_PARAMETER;
|
|
goto out;
|
|
}
|
|
|
|
/* Unloading of unstarted images */
|
|
switch (image_obj->header.type) {
|
|
case EFI_OBJECT_TYPE_STARTED_IMAGE:
|
|
break;
|
|
case EFI_OBJECT_TYPE_LOADED_IMAGE:
|
|
efi_delete_image(image_obj, loaded_image_protocol);
|
|
ret = EFI_SUCCESS;
|
|
goto out;
|
|
default:
|
|
/* Handle does not refer to loaded image */
|
|
ret = EFI_INVALID_PARAMETER;
|
|
goto out;
|
|
}
|
|
/* A started image can only be unloaded it is the last one started. */
|
|
if (image_handle != current_image) {
|
|
ret = EFI_INVALID_PARAMETER;
|
|
goto out;
|
|
}
|
|
|
|
/* Exit data is only foreseen in case of failure. */
|
|
if (exit_status != EFI_SUCCESS) {
|
|
ret = efi_update_exit_data(image_obj, exit_data_size,
|
|
exit_data);
|
|
/* Exiting has priority. Don't return error to caller. */
|
|
if (ret != EFI_SUCCESS)
|
|
EFI_PRINT("%s: out of memory\n", __func__);
|
|
}
|
|
/* efi_delete_image() frees image_obj. Copy before the call. */
|
|
exit_jmp = image_obj->exit_jmp;
|
|
*image_obj->exit_status = exit_status;
|
|
if (image_obj->image_type == IMAGE_SUBSYSTEM_EFI_APPLICATION ||
|
|
exit_status != EFI_SUCCESS)
|
|
efi_delete_image(image_obj, loaded_image_protocol);
|
|
|
|
if (IS_ENABLED(CONFIG_EFI_TCG2_PROTOCOL)) {
|
|
if (image_obj->image_type == IMAGE_SUBSYSTEM_EFI_APPLICATION) {
|
|
ret = efi_tcg2_measure_efi_app_exit();
|
|
if (ret != EFI_SUCCESS)
|
|
log_debug("tcg2 measurement fails (0x%lx)\n",
|
|
ret);
|
|
}
|
|
}
|
|
|
|
/* Make sure entry/exit counts for EFI world cross-overs match */
|
|
EFI_EXIT(exit_status);
|
|
|
|
/*
|
|
* But longjmp out with the U-Boot gd, not the application's, as
|
|
* the other end is a setjmp call inside EFI context.
|
|
*/
|
|
efi_restore_gd();
|
|
|
|
longjmp(exit_jmp, 1);
|
|
|
|
panic("EFI application exited");
|
|
out:
|
|
return EFI_EXIT(ret);
|
|
}
|
|
|
|
/**
|
|
* efi_handle_protocol() - get interface of a protocol on a handle
|
|
* @handle: handle on which the protocol shall be opened
|
|
* @protocol: GUID of the protocol
|
|
* @protocol_interface: interface implementing the protocol
|
|
*
|
|
* This function implements the HandleProtocol service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
efi_status_t EFIAPI efi_handle_protocol(efi_handle_t handle,
|
|
const efi_guid_t *protocol,
|
|
void **protocol_interface)
|
|
{
|
|
return efi_open_protocol(handle, protocol, protocol_interface, efi_root,
|
|
NULL, EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL);
|
|
}
|
|
|
|
/**
|
|
* efi_bind_controller() - bind a single driver to a controller
|
|
* @controller_handle: controller handle
|
|
* @driver_image_handle: driver handle
|
|
* @remain_device_path: remaining path
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t efi_bind_controller(
|
|
efi_handle_t controller_handle,
|
|
efi_handle_t driver_image_handle,
|
|
struct efi_device_path *remain_device_path)
|
|
{
|
|
struct efi_driver_binding_protocol *binding_protocol;
|
|
efi_status_t r;
|
|
|
|
r = EFI_CALL(efi_open_protocol(driver_image_handle,
|
|
&efi_guid_driver_binding_protocol,
|
|
(void **)&binding_protocol,
|
|
driver_image_handle, NULL,
|
|
EFI_OPEN_PROTOCOL_GET_PROTOCOL));
|
|
if (r != EFI_SUCCESS)
|
|
return r;
|
|
r = EFI_CALL(binding_protocol->supported(binding_protocol,
|
|
controller_handle,
|
|
remain_device_path));
|
|
if (r == EFI_SUCCESS)
|
|
r = EFI_CALL(binding_protocol->start(binding_protocol,
|
|
controller_handle,
|
|
remain_device_path));
|
|
efi_close_protocol(driver_image_handle,
|
|
&efi_guid_driver_binding_protocol,
|
|
driver_image_handle, NULL);
|
|
return r;
|
|
}
|
|
|
|
/**
|
|
* efi_connect_single_controller() - connect a single driver to a controller
|
|
* @controller_handle: controller
|
|
* @driver_image_handle: driver
|
|
* @remain_device_path: remaining path
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t efi_connect_single_controller(
|
|
efi_handle_t controller_handle,
|
|
efi_handle_t *driver_image_handle,
|
|
struct efi_device_path *remain_device_path)
|
|
{
|
|
efi_handle_t *buffer;
|
|
size_t count;
|
|
size_t i;
|
|
efi_status_t r;
|
|
size_t connected = 0;
|
|
|
|
/* Get buffer with all handles with driver binding protocol */
|
|
r = EFI_CALL(efi_locate_handle_buffer(BY_PROTOCOL,
|
|
&efi_guid_driver_binding_protocol,
|
|
NULL, &count, &buffer));
|
|
if (r != EFI_SUCCESS)
|
|
return r;
|
|
|
|
/* Context Override */
|
|
if (driver_image_handle) {
|
|
for (; *driver_image_handle; ++driver_image_handle) {
|
|
for (i = 0; i < count; ++i) {
|
|
if (buffer[i] == *driver_image_handle) {
|
|
buffer[i] = NULL;
|
|
r = efi_bind_controller(
|
|
controller_handle,
|
|
*driver_image_handle,
|
|
remain_device_path);
|
|
/*
|
|
* For drivers that do not support the
|
|
* controller or are already connected
|
|
* we receive an error code here.
|
|
*/
|
|
if (r == EFI_SUCCESS)
|
|
++connected;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* TODO: Some overrides are not yet implemented:
|
|
* - Platform Driver Override
|
|
* - Driver Family Override Search
|
|
* - Bus Specific Driver Override
|
|
*/
|
|
|
|
/* Driver Binding Search */
|
|
for (i = 0; i < count; ++i) {
|
|
if (buffer[i]) {
|
|
r = efi_bind_controller(controller_handle,
|
|
buffer[i],
|
|
remain_device_path);
|
|
if (r == EFI_SUCCESS)
|
|
++connected;
|
|
}
|
|
}
|
|
|
|
efi_free_pool(buffer);
|
|
if (!connected)
|
|
return EFI_NOT_FOUND;
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* efi_connect_controller() - connect a controller to a driver
|
|
* @controller_handle: handle of the controller
|
|
* @driver_image_handle: handle of the driver
|
|
* @remain_device_path: device path of a child controller
|
|
* @recursive: true to connect all child controllers
|
|
*
|
|
* This function implements the ConnectController service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* First all driver binding protocol handles are tried for binding drivers.
|
|
* Afterwards all handles that have opened a protocol of the controller
|
|
* with EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER are connected to drivers.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t EFIAPI efi_connect_controller(
|
|
efi_handle_t controller_handle,
|
|
efi_handle_t *driver_image_handle,
|
|
struct efi_device_path *remain_device_path,
|
|
bool recursive)
|
|
{
|
|
efi_status_t r;
|
|
efi_status_t ret = EFI_NOT_FOUND;
|
|
struct efi_object *efiobj;
|
|
|
|
EFI_ENTRY("%p, %p, %pD, %d", controller_handle, driver_image_handle,
|
|
remain_device_path, recursive);
|
|
|
|
efiobj = efi_search_obj(controller_handle);
|
|
if (!efiobj) {
|
|
ret = EFI_INVALID_PARAMETER;
|
|
goto out;
|
|
}
|
|
|
|
r = efi_connect_single_controller(controller_handle,
|
|
driver_image_handle,
|
|
remain_device_path);
|
|
if (r == EFI_SUCCESS)
|
|
ret = EFI_SUCCESS;
|
|
if (recursive) {
|
|
struct efi_handler *handler;
|
|
struct efi_open_protocol_info_item *item;
|
|
|
|
list_for_each_entry(handler, &efiobj->protocols, link) {
|
|
list_for_each_entry(item, &handler->open_infos, link) {
|
|
if (item->info.attributes &
|
|
EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) {
|
|
r = EFI_CALL(efi_connect_controller(
|
|
item->info.controller_handle,
|
|
driver_image_handle,
|
|
remain_device_path,
|
|
recursive));
|
|
if (r == EFI_SUCCESS)
|
|
ret = EFI_SUCCESS;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/* Check for child controller specified by end node */
|
|
if (ret != EFI_SUCCESS && remain_device_path &&
|
|
remain_device_path->type == DEVICE_PATH_TYPE_END)
|
|
ret = EFI_SUCCESS;
|
|
out:
|
|
return EFI_EXIT(ret);
|
|
}
|
|
|
|
/**
|
|
* efi_reinstall_protocol_interface() - reinstall protocol interface
|
|
* @handle: handle on which the protocol shall be reinstalled
|
|
* @protocol: GUID of the protocol to be installed
|
|
* @old_interface: interface to be removed
|
|
* @new_interface: interface to be installed
|
|
*
|
|
* This function implements the ReinstallProtocolInterface service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* The old interface is uninstalled. The new interface is installed.
|
|
* Drivers are connected.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
efi_status_t EFIAPI efi_reinstall_protocol_interface(
|
|
efi_handle_t handle, const efi_guid_t *protocol,
|
|
void *old_interface, void *new_interface)
|
|
{
|
|
efi_status_t ret;
|
|
|
|
EFI_ENTRY("%p, %pUs, %p, %p", handle, protocol, old_interface,
|
|
new_interface);
|
|
|
|
/* Uninstall protocol but do not delete handle */
|
|
ret = efi_uninstall_protocol(handle, protocol, old_interface, true);
|
|
if (ret != EFI_SUCCESS)
|
|
goto out;
|
|
|
|
/* Install the new protocol */
|
|
ret = efi_add_protocol(handle, protocol, new_interface);
|
|
/*
|
|
* The UEFI spec does not specify what should happen to the handle
|
|
* if in case of an error no protocol interface remains on the handle.
|
|
* So let's do nothing here.
|
|
*/
|
|
if (ret != EFI_SUCCESS)
|
|
goto out;
|
|
/*
|
|
* The returned status code has to be ignored.
|
|
* Do not create an error if no suitable driver for the handle exists.
|
|
*/
|
|
EFI_CALL(efi_connect_controller(handle, NULL, NULL, true));
|
|
out:
|
|
return EFI_EXIT(ret);
|
|
}
|
|
|
|
/**
|
|
* efi_get_child_controllers() - get all child controllers associated to a driver
|
|
* @efiobj: handle of the controller
|
|
* @driver_handle: handle of the driver
|
|
* @number_of_children: number of child controllers
|
|
* @child_handle_buffer: handles of the the child controllers
|
|
*
|
|
* The allocated buffer has to be freed with free().
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t efi_get_child_controllers(
|
|
struct efi_object *efiobj,
|
|
efi_handle_t driver_handle,
|
|
efi_uintn_t *number_of_children,
|
|
efi_handle_t **child_handle_buffer)
|
|
{
|
|
struct efi_handler *handler;
|
|
struct efi_open_protocol_info_item *item;
|
|
efi_uintn_t count = 0, i;
|
|
bool duplicate;
|
|
|
|
/* Count all child controller associations */
|
|
list_for_each_entry(handler, &efiobj->protocols, link) {
|
|
list_for_each_entry(item, &handler->open_infos, link) {
|
|
if (item->info.agent_handle == driver_handle &&
|
|
item->info.attributes &
|
|
EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER)
|
|
++count;
|
|
}
|
|
}
|
|
/*
|
|
* Create buffer. In case of duplicate child controller assignments
|
|
* the buffer will be too large. But that does not harm.
|
|
*/
|
|
*number_of_children = 0;
|
|
if (!count)
|
|
return EFI_SUCCESS;
|
|
*child_handle_buffer = calloc(count, sizeof(efi_handle_t));
|
|
if (!*child_handle_buffer)
|
|
return EFI_OUT_OF_RESOURCES;
|
|
/* Copy unique child handles */
|
|
list_for_each_entry(handler, &efiobj->protocols, link) {
|
|
list_for_each_entry(item, &handler->open_infos, link) {
|
|
if (item->info.agent_handle == driver_handle &&
|
|
item->info.attributes &
|
|
EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) {
|
|
/* Check this is a new child controller */
|
|
duplicate = false;
|
|
for (i = 0; i < *number_of_children; ++i) {
|
|
if ((*child_handle_buffer)[i] ==
|
|
item->info.controller_handle)
|
|
duplicate = true;
|
|
}
|
|
/* Copy handle to buffer */
|
|
if (!duplicate) {
|
|
i = (*number_of_children)++;
|
|
(*child_handle_buffer)[i] =
|
|
item->info.controller_handle;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* efi_disconnect_controller() - disconnect a controller from a driver
|
|
* @controller_handle: handle of the controller
|
|
* @driver_image_handle: handle of the driver
|
|
* @child_handle: handle of the child to destroy
|
|
*
|
|
* This function implements the DisconnectController service.
|
|
*
|
|
* See the Unified Extensible Firmware Interface (UEFI) specification for
|
|
* details.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static efi_status_t EFIAPI efi_disconnect_controller(
|
|
efi_handle_t controller_handle,
|
|
efi_handle_t driver_image_handle,
|
|
efi_handle_t child_handle)
|
|
{
|
|
struct efi_driver_binding_protocol *binding_protocol;
|
|
efi_handle_t *child_handle_buffer = NULL;
|
|
size_t number_of_children = 0;
|
|
efi_status_t r;
|
|
struct efi_object *efiobj;
|
|
bool sole_child;
|
|
|
|
EFI_ENTRY("%p, %p, %p", controller_handle, driver_image_handle,
|
|
child_handle);
|
|
|
|
efiobj = efi_search_obj(controller_handle);
|
|
if (!efiobj) {
|
|
r = EFI_INVALID_PARAMETER;
|
|
goto out;
|
|
}
|
|
|
|
if (child_handle && !efi_search_obj(child_handle)) {
|
|
r = EFI_INVALID_PARAMETER;
|
|
goto out;
|
|
}
|
|
|
|
/* If no driver handle is supplied, disconnect all drivers */
|
|
if (!driver_image_handle) {
|
|
r = efi_disconnect_all_drivers(efiobj, NULL, child_handle);
|
|
goto out;
|
|
}
|
|
|
|
/* Create list of child handles */
|
|
r = efi_get_child_controllers(efiobj,
|
|
driver_image_handle,
|
|
&number_of_children,
|
|
&child_handle_buffer);
|
|
if (r != EFI_SUCCESS)
|
|
return r;
|
|
sole_child = (number_of_children == 1);
|
|
|
|
if (child_handle) {
|
|
number_of_children = 1;
|
|
free(child_handle_buffer);
|
|
child_handle_buffer = &child_handle;
|
|
}
|
|
|
|
/* Get the driver binding protocol */
|
|
r = EFI_CALL(efi_open_protocol(driver_image_handle,
|
|
&efi_guid_driver_binding_protocol,
|
|
(void **)&binding_protocol,
|
|
driver_image_handle, NULL,
|
|
EFI_OPEN_PROTOCOL_GET_PROTOCOL));
|
|
if (r != EFI_SUCCESS) {
|
|
r = EFI_INVALID_PARAMETER;
|
|
goto out;
|
|
}
|
|
/* Remove the children */
|
|
if (number_of_children) {
|
|
r = EFI_CALL(binding_protocol->stop(binding_protocol,
|
|
controller_handle,
|
|
number_of_children,
|
|
child_handle_buffer));
|
|
if (r != EFI_SUCCESS) {
|
|
r = EFI_DEVICE_ERROR;
|
|
goto out;
|
|
}
|
|
}
|
|
/* Remove the driver */
|
|
if (!child_handle || sole_child) {
|
|
r = EFI_CALL(binding_protocol->stop(binding_protocol,
|
|
controller_handle,
|
|
0, NULL));
|
|
if (r != EFI_SUCCESS) {
|
|
r = EFI_DEVICE_ERROR;
|
|
goto out;
|
|
}
|
|
}
|
|
efi_close_protocol(driver_image_handle,
|
|
&efi_guid_driver_binding_protocol,
|
|
driver_image_handle, NULL);
|
|
r = EFI_SUCCESS;
|
|
out:
|
|
if (!child_handle)
|
|
free(child_handle_buffer);
|
|
return EFI_EXIT(r);
|
|
}
|
|
|
|
static struct efi_boot_services efi_boot_services = {
|
|
.hdr = {
|
|
.signature = EFI_BOOT_SERVICES_SIGNATURE,
|
|
.revision = EFI_SPECIFICATION_VERSION,
|
|
.headersize = sizeof(struct efi_boot_services),
|
|
},
|
|
.raise_tpl = efi_raise_tpl,
|
|
.restore_tpl = efi_restore_tpl,
|
|
.allocate_pages = efi_allocate_pages_ext,
|
|
.free_pages = efi_free_pages_ext,
|
|
.get_memory_map = efi_get_memory_map_ext,
|
|
.allocate_pool = efi_allocate_pool_ext,
|
|
.free_pool = efi_free_pool_ext,
|
|
.create_event = efi_create_event_ext,
|
|
.set_timer = efi_set_timer_ext,
|
|
.wait_for_event = efi_wait_for_event,
|
|
.signal_event = efi_signal_event_ext,
|
|
.close_event = efi_close_event,
|
|
.check_event = efi_check_event,
|
|
.install_protocol_interface = efi_install_protocol_interface,
|
|
.reinstall_protocol_interface = efi_reinstall_protocol_interface,
|
|
.uninstall_protocol_interface = efi_uninstall_protocol_interface,
|
|
.handle_protocol = efi_handle_protocol,
|
|
.reserved = NULL,
|
|
.register_protocol_notify = efi_register_protocol_notify,
|
|
.locate_handle = efi_locate_handle_ext,
|
|
.locate_device_path = efi_locate_device_path,
|
|
.install_configuration_table = efi_install_configuration_table_ext,
|
|
.load_image = efi_load_image,
|
|
.start_image = efi_start_image,
|
|
.exit = efi_exit,
|
|
.unload_image = efi_unload_image,
|
|
.exit_boot_services = efi_exit_boot_services,
|
|
.get_next_monotonic_count = efi_get_next_monotonic_count,
|
|
.stall = efi_stall,
|
|
.set_watchdog_timer = efi_set_watchdog_timer,
|
|
.connect_controller = efi_connect_controller,
|
|
.disconnect_controller = efi_disconnect_controller,
|
|
.open_protocol = efi_open_protocol,
|
|
.close_protocol = efi_close_protocol_ext,
|
|
.open_protocol_information = efi_open_protocol_information,
|
|
.protocols_per_handle = efi_protocols_per_handle,
|
|
.locate_handle_buffer = efi_locate_handle_buffer,
|
|
.locate_protocol = efi_locate_protocol,
|
|
.install_multiple_protocol_interfaces =
|
|
efi_install_multiple_protocol_interfaces_ext,
|
|
.uninstall_multiple_protocol_interfaces =
|
|
efi_uninstall_multiple_protocol_interfaces_ext,
|
|
.calculate_crc32 = efi_calculate_crc32,
|
|
.copy_mem = efi_copy_mem,
|
|
.set_mem = efi_set_mem,
|
|
.create_event_ex = efi_create_event_ex,
|
|
};
|
|
|
|
static u16 __efi_runtime_data firmware_vendor[] = u"Das U-Boot";
|
|
|
|
struct efi_system_table __efi_runtime_data systab = {
|
|
.hdr = {
|
|
.signature = EFI_SYSTEM_TABLE_SIGNATURE,
|
|
.revision = EFI_SPECIFICATION_VERSION,
|
|
.headersize = sizeof(struct efi_system_table),
|
|
},
|
|
.fw_vendor = firmware_vendor,
|
|
.fw_revision = FW_VERSION << 16 | FW_PATCHLEVEL << 8,
|
|
.runtime = &efi_runtime_services,
|
|
.nr_tables = 0,
|
|
.tables = NULL,
|
|
};
|
|
|
|
/**
|
|
* efi_initialize_system_table() - Initialize system table
|
|
*
|
|
* Return: status code
|
|
*/
|
|
efi_status_t efi_initialize_system_table(void)
|
|
{
|
|
efi_status_t ret;
|
|
|
|
/* Allocate configuration table array */
|
|
ret = efi_allocate_pool(EFI_RUNTIME_SERVICES_DATA,
|
|
EFI_MAX_CONFIGURATION_TABLES *
|
|
sizeof(struct efi_configuration_table),
|
|
(void **)&systab.tables);
|
|
|
|
/*
|
|
* These entries will be set to NULL in ExitBootServices(). To avoid
|
|
* relocation in SetVirtualAddressMap(), set them dynamically.
|
|
*/
|
|
systab.con_in_handle = efi_root;
|
|
systab.con_in = &efi_con_in;
|
|
systab.con_out_handle = efi_root;
|
|
systab.con_out = &efi_con_out;
|
|
systab.stderr_handle = efi_root;
|
|
systab.std_err = &efi_con_out;
|
|
systab.boottime = &efi_boot_services;
|
|
|
|
/* Set CRC32 field in table headers */
|
|
efi_update_table_header_crc32(&systab.hdr);
|
|
efi_update_table_header_crc32(&efi_runtime_services.hdr);
|
|
efi_update_table_header_crc32(&efi_boot_services.hdr);
|
|
|
|
return ret;
|
|
}
|