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x86: Allow devices to write an SSDT

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Call the new core function to write the SSDT. This is made up of fragments
generated by devices that have the fill_ssdt() method.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2020-07-07 13:12:07 -06:00 committed by Bin Meng
parent 0f7b111f70
commit 351fef5c57
1 changed files with 29 additions and 0 deletions
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29
arch/x86/lib/acpi_table.c
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@ -14,6 +14,7 @@
#include <mapmem.h>
#include <serial.h>
#include <version.h>
#include <acpi/acpigen.h>
#include <acpi/acpi_table.h>
#include <asm/acpi/global_nvs.h>
#include <asm/ioapic.h>
@ -354,6 +355,25 @@ static void acpi_create_spcr(struct acpi_spcr *spcr)
header->checksum = table_compute_checksum((void *)spcr, header->length);
}
void acpi_create_ssdt(struct acpi_ctx *ctx, struct acpi_table_header *ssdt,
const char *oem_table_id)
{
memset((void *)ssdt, '\0', sizeof(struct acpi_table_header));
acpi_fill_header(ssdt, "SSDT");
ssdt->revision = acpi_get_table_revision(ACPITAB_SSDT);
ssdt->aslc_revision = 1;
ssdt->length = sizeof(struct acpi_table_header);
acpi_inc(ctx, sizeof(struct acpi_table_header));
acpi_fill_ssdt(ctx);
/* (Re)calculate length and checksum. */
ssdt->length = ctx->current - (void *)ssdt;
ssdt->checksum = table_compute_checksum((void *)ssdt, ssdt->length);
}
/*
* QEMU's version of write_acpi_tables is defined in drivers/misc/qfw.c
*/
@ -363,6 +383,7 @@ ulong write_acpi_tables(ulong start_addr)
struct acpi_facs *facs;
struct acpi_table_header *dsdt;
struct acpi_fadt *fadt;
struct acpi_table_header *ssdt;
struct acpi_mcfg *mcfg;
struct acpi_madt *madt;
struct acpi_csrt *csrt;
@ -418,6 +439,14 @@ ulong write_acpi_tables(ulong start_addr)
acpi_create_fadt(fadt, facs, dsdt);
acpi_add_table(ctx, fadt);
debug("ACPI: * SSDT\n");
ssdt = (struct acpi_table_header *)ctx->current;
acpi_create_ssdt(ctx, ssdt, OEM_TABLE_ID);
if (ssdt->length > sizeof(struct acpi_table_header)) {
acpi_inc_align(ctx, ssdt->length);
acpi_add_table(ctx, ssdt);
}
debug("ACPI: * MCFG\n");
mcfg = ctx->current;
acpi_create_mcfg(mcfg);