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x86: Move SSDT table to a writer function

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Move this table over to use a writer function, moving the code from the
x86 implementation.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2021-12-01 09:02:56 -07:00
parent 379d3c1fd6
commit d953137526
3 changed files with 80 additions and 63 deletions
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93
arch/x86/lib/acpi_table.c
View file

@ -176,26 +176,6 @@ __weak u32 acpi_fill_mcfg(u32 current)
return current;
}
/* MCFG is defined in the PCI Firmware Specification 3.0 */
static void acpi_create_mcfg(struct acpi_mcfg *mcfg)
{
struct acpi_table_header *header = &(mcfg->header);
u32 current = (u32)mcfg + sizeof(struct acpi_mcfg);
memset((void *)mcfg, 0, sizeof(struct acpi_mcfg));
/* Fill out header fields */
acpi_fill_header(header, "MCFG");
header->length = sizeof(struct acpi_mcfg);
header->revision = 1;
current = acpi_fill_mcfg(current);
/* (Re)calculate length and checksum */
header->length = current - (u32)mcfg;
header->checksum = table_compute_checksum((void *)mcfg, header->length);
}
/**
* acpi_create_tcpa() - Create a TCPA table
*
@ -449,36 +429,6 @@ static void acpi_create_spcr(struct acpi_spcr *spcr)
header->checksum = table_compute_checksum((void *)spcr, header->length);
}
static int 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);
log_debug("SSDT at %p, length %x\n", ssdt, ssdt->length);
/* Drop the table if it is empty */
if (ssdt->length == sizeof(struct acpi_table_header)) {
ctx->current = ssdt;
return -ENOENT;
}
acpi_align(ctx);
return 0;
}
int acpi_write_gnvs(struct acpi_ctx *ctx, const struct acpi_writer *entry)
{
ulong addr;
@ -523,31 +473,48 @@ int acpi_write_gnvs(struct acpi_ctx *ctx, const struct acpi_writer *entry)
}
ACPI_WRITER(4gnvs, "GNVS", acpi_write_gnvs, 0);
/* MCFG is defined in the PCI Firmware Specification 3.0 */
int acpi_write_mcfg(struct acpi_ctx *ctx, const struct acpi_writer *entry)
{
struct acpi_table_header *header;
struct acpi_mcfg *mcfg;
u32 current;
mcfg = ctx->current;
header = &mcfg->header;
current = (u32)mcfg + sizeof(struct acpi_mcfg);
memset(mcfg, '\0', sizeof(struct acpi_mcfg));
/* Fill out header fields */
acpi_fill_header(header, "MCFG");
header->length = sizeof(struct acpi_mcfg);
header->revision = 1;
/* (Re)calculate length and checksum */
header->length = current - (u32)mcfg;
header->checksum = table_compute_checksum(mcfg, header->length);
acpi_inc(ctx, mcfg->header.length);
acpi_add_table(ctx, mcfg);
return 0;
}
ACPI_WRITER(5mcfg, "MCFG", acpi_write_mcfg, 0);
/*
* QEMU's version of write_acpi_tables is defined in drivers/misc/qfw.c
*/
int write_acpi_tables_x86(struct acpi_ctx *ctx,
const struct acpi_writer *entry)
{
struct acpi_table_header *ssdt;
struct acpi_mcfg *mcfg;
struct acpi_tcpa *tcpa;
struct acpi_madt *madt;
struct acpi_csrt *csrt;
struct acpi_spcr *spcr;
int ret;
debug("ACPI: * SSDT\n");
ssdt = (struct acpi_table_header *)ctx->current;
if (!acpi_create_ssdt(ctx, ssdt, OEM_TABLE_ID))
acpi_add_table(ctx, ssdt);
debug("ACPI: * MCFG\n");
mcfg = ctx->current;
acpi_create_mcfg(mcfg);
acpi_inc_align(ctx, mcfg->header.length);
acpi_add_table(ctx, mcfg);
if (IS_ENABLED(CONFIG_TPM_V2)) {
struct acpi_tpm2 *tpm2;

1
lib/acpi/Makefile
View file

@ -17,4 +17,5 @@ obj-y += dsdt.o
endif
obj-y += facs.o
obj-y += ssdt.o
endif

49
lib/acpi/ssdt.c Normal file
View file

@ -0,0 +1,49 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Write an ACPI Secondary System Descriptor Table (SSDT) table
*
* Copyright 2021 Google LLC
*/
#define LOG_CATEGORY LOGC_ACPI
#include <common.h>
#include <acpi/acpi_table.h>
#include <dm/acpi.h>
#include <tables_csum.h>
int acpi_write_ssdt(struct acpi_ctx *ctx, const struct acpi_writer *entry)
{
struct acpi_table_header *ssdt;
int ret;
ssdt = ctx->current;
memset((void *)ssdt, '\0', sizeof(struct acpi_table_header));
acpi_fill_header(ssdt, "SSDT");
memcpy(ssdt->oem_table_id, OEM_TABLE_ID, sizeof(ssdt->oem_table_id));
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));
ret = acpi_fill_ssdt(ctx);
if (ret) {
ctx->current = ssdt;
return log_msg_ret("fill", ret);
}
/* (Re)calculate length and checksum */
ssdt->length = ctx->current - (void *)ssdt;
ssdt->checksum = table_compute_checksum((void *)ssdt, ssdt->length);
log_debug("SSDT at %p, length %x\n", ssdt, ssdt->length);
/* Drop the table if it is empty */
if (ssdt->length == sizeof(struct acpi_table_header))
return log_msg_ret("fill", -ENOENT);
acpi_add_table(ctx, ssdt);
return 0;
}
ACPI_WRITER(6ssdt, "SSDT", acpi_write_ssdt, 0);