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b2f088c121
We have two implementations of write_acpi_tables(). One for writing ACPI tables based on ACPI_WRITER() entries another based on copying tables from QEMU. Create a symbol CONFIG_QFW_ACPI that signifies copying ACPI tables from QEMU and use it consistently. Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Reviewed-by: Simon Glass <sjg@chromium.org>
132 lines
2.7 KiB
C
132 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Handles writing the declared ACPI tables
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*
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* Copyright 2021 Google LLC
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*/
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#define LOG_CATEGORY LOGC_ACPI
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#include <log.h>
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#include <malloc.h>
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#include <mapmem.h>
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#include <acpi/acpi_table.h>
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#include <asm/global_data.h>
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#include <dm/acpi.h>
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#include <linux/errno.h>
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DECLARE_GLOBAL_DATA_PTR;
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int acpi_write_one(struct acpi_ctx *ctx, const struct acpi_writer *entry)
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{
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int ret;
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log_debug("%s: writing table '%s'\n", entry->name,
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entry->table);
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ctx->tab_start = ctx->current;
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ret = entry->h_write(ctx, entry);
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if (ret == -ENOENT) {
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log_debug("%s: Omitted due to being empty\n",
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entry->name);
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ret = 0;
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ctx->current = ctx->tab_start; /* drop the table */
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return ret;
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}
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if (ret)
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return log_msg_ret("write", ret);
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if (entry->flags & ACPIWF_ALIGN64)
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acpi_align64(ctx);
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else
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acpi_align(ctx);
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/* Add the item to the internal list */
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ret = acpi_add_other_item(ctx, entry, ctx->tab_start);
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if (ret)
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return log_msg_ret("add", ret);
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return 0;
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}
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#ifndef CONFIG_QFW_ACPI
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static int acpi_write_all(struct acpi_ctx *ctx)
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{
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const struct acpi_writer *writer =
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ll_entry_start(struct acpi_writer, acpi_writer);
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const int n_ents = ll_entry_count(struct acpi_writer, acpi_writer);
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const struct acpi_writer *entry;
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int ret;
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for (entry = writer; entry != writer + n_ents; entry++) {
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ret = acpi_write_one(ctx, entry);
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if (ret && ret != -ENOENT)
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return log_msg_ret("one", ret);
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}
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return 0;
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}
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/*
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* QEMU's version of write_acpi_tables is defined in drivers/misc/qfw.c
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*/
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ulong write_acpi_tables(ulong start_addr)
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{
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struct acpi_ctx *ctx;
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ulong addr;
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int ret;
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ctx = malloc(sizeof(*ctx));
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if (!ctx)
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return log_msg_ret("mem", -ENOMEM);
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log_debug("ACPI: Writing ACPI tables at %lx\n", start_addr);
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acpi_reset_items();
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acpi_setup_ctx(ctx, start_addr);
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ret = acpi_write_all(ctx);
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if (ret) {
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log_err("Failed to write ACPI tables (err=%d)\n", ret);
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return log_msg_ret("write", -ENOMEM);
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}
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addr = map_to_sysmem(ctx->current);
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log_debug("ACPI current = %lx\n", addr);
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return addr;
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}
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int write_dev_tables(struct acpi_ctx *ctx, const struct acpi_writer *entry)
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{
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int ret;
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ret = acpi_write_dev_tables(ctx);
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if (ret)
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return log_msg_ret("write", ret);
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return 0;
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}
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ACPI_WRITER(8dev, NULL, write_dev_tables, 0);
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ulong acpi_get_rsdp_addr(void)
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{
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if (!gd->acpi_ctx)
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return 0;
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return map_to_sysmem(gd->acpi_ctx->rsdp);
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}
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#endif /* QFW_ACPI */
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void acpi_setup_ctx(struct acpi_ctx *ctx, ulong start)
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{
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gd->acpi_ctx = ctx;
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memset(ctx, '\0', sizeof(*ctx));
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/* Align ACPI tables to 16-byte boundary */
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start = ALIGN(start, 16);
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ctx->base = map_sysmem(start, 0);
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ctx->current = ctx->base;
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gd_set_acpi_start(start);
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}
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