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Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
76 lines
2.3 KiB
C
76 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Copyright 2002
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* Daniel Engström, Omicron Ceti AB, daniel@omicron.se
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*/
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#ifndef _ASM_ZIMAGE_H_
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#define _ASM_ZIMAGE_H_
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#include <asm/bootparam.h>
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#include <asm/e820.h>
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/* linux i386 zImage/bzImage header. Offsets relative to
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* the start of the image */
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#define HEAP_FLAG 0x80
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#define BIG_KERNEL_FLAG 0x01
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/* magic numbers */
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#define KERNEL_MAGIC 0xaa55
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#define KERNEL_V2_MAGIC 0x53726448
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#define COMMAND_LINE_MAGIC 0xA33F
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/* limits */
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#define BZIMAGE_MAX_SIZE 15*1024*1024 /* 15MB */
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#define ZIMAGE_MAX_SIZE 512*1024 /* 512k */
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#define SETUP_MAX_SIZE 32768
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#define SETUP_START_OFFSET 0x200
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#define BZIMAGE_LOAD_ADDR 0x100000
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#define ZIMAGE_LOAD_ADDR 0x10000
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/**
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* load_zimage() - Load a zImage or bzImage
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*
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* This copies an image into the standard location ready for setup
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*
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* @image: Address of image to load
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* @kernel_size: Size of kernel including setup block (or 0 if the kernel is
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* new enough to have a 'syssize' value)
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* @load_addressp: Returns the address where the kernel has been loaded
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* Return: address of setup block, or NULL if something went wrong
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*/
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struct boot_params *load_zimage(char *image, unsigned long kernel_size,
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ulong *load_addressp);
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/**
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* setup_zimage() - Set up a loaded zImage or bzImage ready for booting
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*
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* @setup_base: Pointer to the boot parameters, typically at address
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* DEFAULT_SETUP_BASE
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* @cmd_line: Place to put the command line, or NULL to use the one in the setup
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* block
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* @initrd_addr: Address of the initial ramdisk, or 0 if none
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* @initrd_size: Size of the initial ramdisk, or 0 if none
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* @load_address: Address where the bzImage is moved before booting, either
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* BZIMAGE_LOAD_ADDR or ZIMAGE_LOAD_ADDR
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* @cmdline_force: Address of 'override' command line, or 0 to use the one in
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* the * setup block
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* Return: 0 (always)
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*/
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int setup_zimage(struct boot_params *setup_base, char *cmd_line, int auto_boot,
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ulong initrd_addr, ulong initrd_size, ulong cmdline_force);
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/**
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* zimage_dump() - Dump the metadata of a zimage
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*
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* This shows all available information in a zimage that has been loaded.
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*
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* @base_ptr: Pointer to the boot parameters, typically at address
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* DEFAULT_SETUP_BASE
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*/
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void zimage_dump(struct boot_params *base_ptr);
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#endif
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