arch/x86/acpi: Add SSDT for QEMU
Add a SSDT on qemu and place BOOT0000 inside it to allow testing
the google firmware kernel module in qemu.
Tested on Qemu Q35.
Change-Id: Ibd1b2c2f4fc3db9ae8f338b0d53b2d00ea2c4190
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35382
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: HIMANSHU SAHDEV <sahdev.himan@gmail.com>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
diff --git a/src/arch/x86/acpi.c b/src/arch/x86/acpi.c
index b486409..8e4de82 100644
--- a/src/arch/x86/acpi.c
+++ b/src/arch/x86/acpi.c
@@ -37,6 +37,8 @@
#include <version.h>
#include <commonlib/sort.h>
+static acpi_rsdp_t *valid_rsdp(acpi_rsdp_t *rsdp);
+
u8 acpi_checksum(u8 *table, u32 length)
{
u8 ret = 0;
@@ -1260,9 +1262,51 @@
/* Align ACPI tables to 16byte */
current = acpi_align_current(current);
+ /* Special case for qemu */
fw = fw_cfg_acpi_tables(current);
- if (fw)
+ if (fw) {
+ rsdp = NULL;
+ /* Find RSDP. */
+ for (void *p = (void *)current; p < (void *)fw; p += 16) {
+ if (valid_rsdp((acpi_rsdp_t *)p)) {
+ rsdp = p;
+ break;
+ }
+ }
+ if (!rsdp)
+ return fw;
+
+ /* Add BOOT0000 for Linux google firmware driver */
+ printk(BIOS_DEBUG, "ACPI: * SSDT\n");
+ ssdt = (acpi_header_t *)fw;
+ current = (unsigned long)ssdt + sizeof(acpi_header_t);
+
+ memset((void *)ssdt, 0, sizeof(acpi_header_t));
+
+ memcpy(&ssdt->signature, "SSDT", 4);
+ ssdt->revision = get_acpi_table_revision(SSDT);
+ memcpy(&ssdt->oem_id, OEM_ID, 6);
+ memcpy(&ssdt->oem_table_id, oem_table_id, 8);
+ ssdt->oem_revision = 42;
+ memcpy(&ssdt->asl_compiler_id, ASLC, 4);
+ ssdt->asl_compiler_revision = asl_revision;
+ ssdt->length = sizeof(acpi_header_t);
+
+ acpigen_set_current((char *) current);
+
+ /* Write object to declare coreboot tables */
+ acpi_ssdt_write_cbtable();
+
+ /* (Re)calculate length and checksum. */
+ ssdt->length = current - (unsigned long)ssdt;
+ ssdt->checksum = acpi_checksum((void *)ssdt, ssdt->length);
+
+ acpi_create_ssdt_generator(ssdt, ACPI_TABLE_CREATOR);
+
+ acpi_add_table(rsdp, ssdt);
+
return fw;
+ }
dsdt_file = cbfs_boot_map_with_leak(
CONFIG_CBFS_PREFIX "/dsdt.aml",