diff options
| author | Arthur Heymans <arthur@aheymans.xyz> | 2022-03-03 22:59:23 +0100 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2022-03-30 00:03:28 +0000 |
| commit | cddba4528d062b676d3766d1bb83504de00042cb (patch) | |
| tree | 979d6115de49bc083c6a0e107b137931913ba12a | |
| parent | 4a3331d93cc6296c1c5d966b8e914608b865819f (diff) | |
libpayload: Parse the ACPI RSDP table entry
Change-Id: I583cda63c3f0b58f8d198ed5ecea7c4619c7a897
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62576
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
| -rw-r--r-- | payloads/libpayload/include/coreboot_tables.h | 11 | ||||
| -rw-r--r-- | payloads/libpayload/include/sysinfo.h | 1 | ||||
| -rw-r--r-- | payloads/libpayload/libc/coreboot.c | 9 |
3 files changed, 21 insertions, 0 deletions
diff --git a/payloads/libpayload/include/coreboot_tables.h b/payloads/libpayload/include/coreboot_tables.h index 3fd3fc85e1..bd23d34c83 100644 --- a/payloads/libpayload/include/coreboot_tables.h +++ b/payloads/libpayload/include/coreboot_tables.h @@ -83,6 +83,7 @@ enum { CB_TAG_BOARD_CONFIG = 0x0040, CB_TAG_ACPI_CNVS = 0x0041, CB_TAG_TYPE_C_INFO = 0x0042, + CB_TAG_ACPI_RSDP = 0x0043, CB_TAG_CMOS_OPTION_TABLE = 0x00c8, CB_TAG_OPTION = 0x00c9, CB_TAG_OPTION_ENUM = 0x00ca, @@ -422,6 +423,16 @@ struct cb_cmos_checksum { u32 type; }; +/* + * Handoff the ACPI RSDP + */ +struct cb_acpi_rsdp { + uint32_t tag; + uint32_t size; + struct cbuint64 rsdp_pointer; /* Address of the ACPI RSDP */ +}; + + /* Helpful inlines */ static inline u64 cb_unpack64(struct cbuint64 val) diff --git a/payloads/libpayload/include/sysinfo.h b/payloads/libpayload/include/sysinfo.h index eba4b89227..c8c10524f4 100644 --- a/payloads/libpayload/include/sysinfo.h +++ b/payloads/libpayload/include/sysinfo.h @@ -111,6 +111,7 @@ struct sysinfo_t { uintptr_t mrc_cache; uintptr_t acpi_gnvs; uintptr_t acpi_cnvs; + uintptr_t acpi_rsdp; #define UNDEFINED_STRAPPING_ID (~0) #define UNDEFINED_FW_CONFIG ~((uint64_t)0) diff --git a/payloads/libpayload/libc/coreboot.c b/payloads/libpayload/libc/coreboot.c index f5695d62dd..2474df96fa 100644 --- a/payloads/libpayload/libc/coreboot.c +++ b/payloads/libpayload/libc/coreboot.c @@ -268,6 +268,12 @@ static void cb_parse_cbmem_entry(void *ptr, struct sysinfo_t *info) } } +static void cb_parse_rsdp(void *ptr, struct sysinfo_t *info) +{ + const struct cb_acpi_rsdp *cb_acpi_rsdp = ptr; + info->acpi_rsdp = cb_unpack64(cb_acpi_rsdp->rsdp_pointer); +} + int cb_parse_header(void *addr, int len, struct sysinfo_t *info) { struct cb_header *header; @@ -408,6 +414,9 @@ int cb_parse_header(void *addr, int len, struct sysinfo_t *info) cb_parse_tsc_info(ptr, info); break; #endif + case CB_TAG_ACPI_RSDP: + cb_parse_rsdp(ptr, info); + break; default: cb_parse_arch_specific(rec, info); break; |