New patch to review for coreboot: cbfs: add a parser for boot media params to coreboot table

[Patrick Georgi]

Patrick Georgi ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/10869

-gerrit

commit 3ae1b8ac9b586a806dbe826cb919077e8a8d54d1
Author: Daisuke Nojiri 
Date:   Wed Jul 1 10:49:37 2015 -0700

cbfs: add a parser for boot media params to coreboot table

This change allows a payload to read a cbfs header offset from coreboot
    table.

[pg: adapted to match new structure layout and to use fmap]

BUG=none
    BRANCH=tot
    TEST=dumped cbfs offset through a test-printf in depthcharge

Change-Id: I75a8ee6b93f349b9f2fab1e82826aba675949c0a
    Signed-off-by: Daisuke Nojiri 
    Signed-off-by: Patrick Georgi 
---
 payloads/libpayload/include/coreboot_tables.h |  9 +++++++++
 payloads/libpayload/include/sysinfo.h         |  1 +
 payloads/libpayload/libc/coreboot.c           | 13 +++++++++++++
 3 files changed, 23 insertions(+)

diff --git a/payloads/libpayload/include/coreboot_tables.h b/payloads/libpayload/include/coreboot_tables.h
index 0c516b1..b19d2fb 100644
--- a/payloads/libpayload/include/coreboot_tables.h
+++ b/payloads/libpayload/include/coreboot_tables.h
@@ -257,6 +257,15 @@ 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;
+	/* offset from the start of the media */
+	uint32_t fmap_offset;
+	char fmap_name[32];
+};
+
 #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 c407c3d..0c5ea59 100644
--- a/payloads/libpayload/include/sysinfo.h
+++ b/payloads/libpayload/include/sysinfo.h
@@ -124,6 +124,7 @@ struct sysinfo_t {
    	uint32_t sector_size;
    	uint32_t erase_cmd;
    } spi_flash;
+	uint32_t cbfs_header_offset;
    uint64_t mtc_start;
    uint32_t mtc_size;
 };
diff --git a/payloads/libpayload/libc/coreboot.c b/payloads/libpayload/libc/coreboot.c
index 8a5d3ae..b8c29d4 100644
--- a/payloads/libpayload/libc/coreboot.c
+++ b/payloads/libpayload/libc/coreboot.c
@@ -220,6 +220,16 @@ 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;
+	fmap_region_by_name(
+		bmp->fmap_offset, bmp->fmap_name,
+		&info->cbfs_header_offset, NULL);
+}
+
 int cb_parse_header(void *addr, int len, struct sysinfo_t *info)
 {
    struct cb_header *header;
@@ -372,6 +382,9 @@ 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;