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-rw-r--r--payloads/libpayload/include/coreboot_tables.h7
-rw-r--r--payloads/libpayload/include/sysinfo.h1
-rw-r--r--payloads/libpayload/libc/coreboot.c15
3 files changed, 21 insertions, 2 deletions
diff --git a/payloads/libpayload/include/coreboot_tables.h b/payloads/libpayload/include/coreboot_tables.h
index e9c159d8bc..a3a0a05a32 100644
--- a/payloads/libpayload/include/coreboot_tables.h
+++ b/payloads/libpayload/include/coreboot_tables.h
@@ -239,6 +239,13 @@ struct cb_macs {
struct mac_address mac_addrs[0];
};
+#define CB_TAG_RAM_CODE 0x0028
+struct cb_ram_code {
+ uint32_t tag;
+ uint32_t size;
+ uint32_t ram_code;
+};
+
#define CB_TAG_CMOS_OPTION_TABLE 0x00c8
struct cb_cmos_option_table {
u32 tag;
diff --git a/payloads/libpayload/include/sysinfo.h b/payloads/libpayload/include/sysinfo.h
index 825e4ef2ad..e15d186533 100644
--- a/payloads/libpayload/include/sysinfo.h
+++ b/payloads/libpayload/include/sysinfo.h
@@ -114,6 +114,7 @@ struct sysinfo_t {
void *mrc_cache;
void *acpi_gnvs;
u32 board_id;
+ u32 ram_code;
void *wifi_calibration;
uint64_t ramoops_buffer;
uint32_t ramoops_buffer_size;
diff --git a/payloads/libpayload/libc/coreboot.c b/payloads/libpayload/libc/coreboot.c
index 489adf4a9f..1f1cf320a2 100644
--- a/payloads/libpayload/libc/coreboot.c
+++ b/payloads/libpayload/libc/coreboot.c
@@ -154,6 +154,12 @@ static void cb_parse_board_id(unsigned char *ptr, struct sysinfo_t *info)
info->board_id = cbbid->board_id;
}
+static void cb_parse_ram_code(unsigned char *ptr, struct sysinfo_t *info)
+{
+ struct cb_ram_code *const ram_code = (struct cb_ram_code *)ptr;
+ info->ram_code = ram_code->ram_code;
+}
+
#ifdef CONFIG_LP_NVRAM
static void cb_parse_optiontable(void *ptr, struct sysinfo_t *info)
{
@@ -228,10 +234,12 @@ int cb_parse_header(void *addr, int len, struct sysinfo_t *info)
info->header = header;
/*
- * Valid board IDs are small numbers, preset this to an invalid value
- * for the case when firmware does not supply the board ID.
+ * Board straps represented by numerical values are small numbers.
+ * Preset them to an invalid value in case the firmware does not
+ * supply the info.
*/
info->board_id = ~0;
+ info->ram_code = ~0;
/* Now, walk the tables. */
ptr += header->header_bytes;
@@ -329,6 +337,9 @@ int cb_parse_header(void *addr, int len, struct sysinfo_t *info)
case CB_TAG_BOARD_ID:
cb_parse_board_id(ptr, info);
break;
+ case CB_TAG_RAM_CODE:
+ cb_parse_ram_code(ptr, info);
+ break;
case CB_TAG_WIFI_CALIBRATION:
cb_parse_wifi_calibration(ptr, info);
break;