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| author | Patrick Rudolph <patrick.rudolph@9elements.com> | 2019-09-10 15:40:47 +0200 |
|---|---|---|
| committer | Patrick Rudolph <siro@das-labor.org> | 2019-10-04 06:44:44 +0000 |
| commit | cfe08ff1976bb6a4b922810f2a16132a07e6af47 (patch) | |
| tree | 576fab9d4479fc2fcc3bca55b58d7b4fe0e2b275 /src/arch | |
| parent | 8be1fdf26f28136040386bdbb666949aa5ed44fc (diff) | |
| download | coreboot-cfe08ff1976bb6a4b922810f2a16132a07e6af47.tar.xz | |
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>
Diffstat (limited to 'src/arch')
| -rw-r--r-- | src/arch/x86/acpi.c | 46 |
1 files changed, 45 insertions, 1 deletions
diff --git a/src/arch/x86/acpi.c b/src/arch/x86/acpi.c index b48640901c..8e4de8214f 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 @@ 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", |