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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>
This commit is contained in:
Patrick Rudolph 2019-09-10 15:40:47 +02:00 committed by Patrick Rudolph
parent 8be1fdf26f
commit cfe08ff197
1 changed files with 45 additions and 1 deletions
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46
src/arch/x86/acpi.c
View File

@ -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 @@ unsigned long write_acpi_tables(unsigned long start)
/* 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",