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https://github.com/AsahiLinux/u-boot
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2d7c738296
At present this list is used to collect items within the DSDT and SSDT tables. It is useful for it to collect the whole tables as well, so there is a list of what was created and which write created each one. Refactor the code accordingly. Signed-off-by: Simon Glass <sjg@chromium.org>
131 lines
2.6 KiB
C
131 lines
2.6 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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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_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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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 /* 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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