libpayload: add support for vboot_handoff

The vboot_handoff structure needs to be parsed from the coreboot tables.
Add a placeholder in sysinfo as well as the ability to parse the
coreboot table entry concering the vboot_handoff structure.

Built with unified boot loader and ebuild changes. Can find and use
the VbInitParams for doing kernel selection.

Change-Id: If40a863b4a445fa5f7814325add03355fd0ac647
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/2720
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/payloads/libpayload/include/coreboot_tables.h b/payloads/libpayload/include/coreboot_tables.h
index 43fd41bf21..38bda55d75 100644
--- a/payloads/libpayload/include/coreboot_tables.h
+++ b/payloads/libpayload/include/coreboot_tables.h
@@ -209,6 +209,14 @@ struct cb_vbnv {
 	uint32_t vbnv_size;
 };
 
+#define CB_TAG_VBOOT_HANDOFF	0x0020
+struct cb_vboot_handoff {
+	uint32_t tag;
+	uint32_t size;
+	void *vboot_handoff_addr;
+	uint32_t vboot_handoff_size;
+};
+
 #define CB_TAG_CMOS_OPTION_TABLE 0x00c8
 struct cb_cmos_option_table {
 	u32 tag;