@@ -13,6 +13,7 @@
#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>
@@ -353,6 +354,46 @@ static void acpi_create_spcr(struct acpi_spcr *spcr)
header->checksum = table_compute_checksum((void *)spcr, header->length);
}
+static void acpi_ssdt_write_cbtable(struct acpi_ctx *ctx)
+{
+ uintptr_t base;
+ u32 size;
+
+ base = 0;
+ size = 0;
+
+ acpigen_write_device(ctx, "CTBL");
+ acpigen_write_coreboot_hid(ctx, COREBOOT_ACPI_ID_CBTABLE);
+ acpigen_write_name_integer(ctx, "_UID", 0);
+ acpigen_write_sta(ctx, ACPI_DSTATUS_HIDDEN_ON);
+ acpigen_write_name(ctx, "_CRS");
+ acpigen_write_resourcetemplate_header(ctx);
+ acpigen_write_mem32fixed(ctx, 0, base, size);
+ acpigen_write_resourcetemplate_footer(ctx);
+ acpigen_pop_len(ctx);
+}
+
+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));
+
+ /* Write object to declare coreboot tables */
+ acpi_ssdt_write_cbtable(ctx);
+ 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
*/
@@ -362,6 +403,7 @@ 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;
@@ -417,6 +459,14 @@ 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);
@@ -25,6 +25,12 @@
struct acpi_ctx;
+/* List of ACPI HID that use the coreboot ACPI ID */
+enum coreboot_acpi_ids {
+ COREBOOT_ACPI_ID_CBTABLE = 0x0000, /* BOOT0000 */
+ COREBOOT_ACPI_ID_MAX = 0xFFFF, /* BOOTFFFF */
+};
+
/*
* RSDP (Root System Description Pointer)
* Note: ACPI 1.0 didn't have length, xsdt_address, and ext_checksum
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 at chromium.org> --- Changes in v1: - Use OEM_TABLE_ID instead of ACPI_TABLE_CREATOR - Update ACPI_DSTATUS enum arch/x86/lib/acpi_table.c | 50 +++++++++++++++++++++++++++++++++++++++ include/acpi/acpi_table.h | 6 +++++ 2 files changed, 56 insertions(+)