libpayload: store boot media information in sysinfo

Write boot media information in sysinfo, if it exists. This allows picking the
right CBFS for further files in case there are several.

Change-Id: I75a8ee6b93f349b9f2fab1e82826aba675949c0a
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-on: http://review.coreboot.org/10869
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins)

3 files changed, 29 insertions, 0 deletions

diff --git a/payloads/libpayload/include/coreboot_tables.h b/payloads/libpayload/include/coreboot_tables.h
index 0c516b1e49..24cbf453eb 100644
--- a/payloads/libpayload/include/coreboot_tables.h
+++ b/payloads/libpayload/include/coreboot_tables.h
@@ -257,6 +257,17 @@ struct cb_spi_flash {
 	uint32_t erase_cmd;
 };
 
+#define CB_TAG_BOOT_MEDIA_PARAMS 0x0030
+struct cb_boot_media_params {
+	uint32_t tag;
+	uint32_t size;
+	/* offsets are relative to start of boot media */
+	uint64_t fmap_offset;
+	uint64_t cbfs_offset;
+	uint64_t cbfs_size;
+	uint64_t boot_media_size;
+};
+
 #define CB_TAG_SERIALNO		0x002a
 #define CB_MAX_SERIALNO_LENGTH	32
 
diff --git a/payloads/libpayload/include/sysinfo.h b/payloads/libpayload/include/sysinfo.h
index c407c3d16b..b97ae14771 100644
--- a/payloads/libpayload/include/sysinfo.h
+++ b/payloads/libpayload/include/sysinfo.h
@@ -124,6 +124,10 @@ struct sysinfo_t {
 		uint32_t sector_size;
 		uint32_t erase_cmd;
 	} spi_flash;
+	uint64_t fmap_offset;
+	uint64_t cbfs_offset;
+	uint64_t cbfs_size;
+	uint64_t boot_media_size;
 	uint64_t mtc_start;
 	uint32_t mtc_size;
 };
diff --git a/payloads/libpayload/libc/coreboot.c b/payloads/libpayload/libc/coreboot.c
index 8a5d3ae7f4..3e248e19c3 100644
--- a/payloads/libpayload/libc/coreboot.c
+++ b/payloads/libpayload/libc/coreboot.c
@@ -220,6 +220,17 @@ static void cb_parse_spi_flash(void *ptr, struct sysinfo_t *info)
 	info->spi_flash.erase_cmd = flash->erase_cmd;
 }
 
+static void cb_parse_boot_media_params(unsigned char *ptr,
+				       struct sysinfo_t *info)
+{
+	struct cb_boot_media_params *const bmp =
+			(struct cb_boot_media_params *)ptr;
+	info->fmap_offset = bmp->fmap_offset;
+	info->cbfs_offset = bmp->cbfs_offset;
+	info->cbfs_size = bmp->cbfs_size;
+	info->boot_media_size = bmp->boot_media_size;
+}
+
 int cb_parse_header(void *addr, int len, struct sysinfo_t *info)
 {
 	struct cb_header *header;
@@ -372,6 +383,9 @@ int cb_parse_header(void *addr, int len, struct sysinfo_t *info)
 		case CB_TAG_MTC:
 			cb_parse_mtc(ptr, info);
 			break;
+		case CB_TAG_BOOT_MEDIA_PARAMS:
+			cb_parse_boot_media_params(ptr, info);
+			break;
 		default:
 			cb_parse_arch_specific(rec, info);
 			break;