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31c27eb830
Use the new ACPI writer to write the ACPI tables. At present this is all done in one monolithic function. Future work will split this out. Unfortunately the QFW write_acpi_tables() function conflicts with the 'writer' version, so disable that for sandbox. Signed-off-by: Simon Glass <sjg@chromium.org>
103 lines
2.1 KiB
C
103 lines
2.1 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 <common.h>
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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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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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acpi_align(ctx);
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return 0;
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}
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#ifndef CONFIG_QEMU
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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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#endif /* QEMU */
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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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