mb/amd/majolica: Add chromeos support

This change enables vboot support. To use it add CHROMEOS=y to your
config.

TEST=Boot majolica and see verstage run, and then see depthcharge load.

coreboot-4.13-1730-g881092709a5e Fri Feb  5 23:50:28 UTC 2021 verstage starting (log level: 8)...
Phase 1
FMAP: area GBB found @ 805000 (458752 bytes)
VB2:vb2_check_recovery() Recovery reason from previous boot: 0x0 / 0x0
Phase 2
Phase 3
FMAP: area GBB found @ 805000 (458752 bytes)
FMAP: area VBLOCK_A found @ 30000 (8192 bytes)
FMAP: area VBLOCK_A found @ 30000 (8192 bytes)
VB2:vb2_verify_keyblock() Checking keyblock signature...
VB2:vb2_verify_digest() HW RSA forbidden, using SW
VB2:vb2_rsa_verify_digest() HW modexp forbidden, using SW
FMAP: area VBLOCK_A found @ 30000 (8192 bytes)
FMAP: area VBLOCK_A found @ 30000 (8192 bytes)
VB2:vb2_verify_fw_preamble() Verifying preamble.
VB2:vb2_verify_digest() HW RSA forbidden, using SW
VB2:vb2_rsa_verify_digest() HW modexp forbidden, using SW
Phase 4
FMAP: area FW_MAIN_A found @ 32000 (3137280 bytes)
VB2:vb2api_init_hash() HW crypto forbidden by TPM flag, using SW
VB2:vb2_verify_digest() HW RSA forbidden, using SW
VB2:vb2_rsa_verify_digest() HW modexp forbidden, using SW
Saving secdata firmware
Saving secdata kernel
Saving nvdata
Slot A is selected
FMAP: area FW_MAIN_A found @ 32000 (3137280 bytes)
CBFS: mcache @0x02017000 built for 9 files, used 0x1ec of 0x800 bytes
CBFS: Found 'fallback/romstage' @0x0 size 0x753c in mcache @0x02017000
BS: verstage times (exec / console): total (unknown) / 116 ms

coreboot-4.13-1730-g881092709a5e Fri Feb  5 23:50:28 UTC 2021 romstage starting (log level: 8)...
Family_Model: 00a50f00
FMAP: area FW_MAIN_A found @ 32000 (3137280 bytes)
CBFS: Found 'fspm.bin' @0x15440 size 0x2257d in mcache @0x02017138

Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: I43f0c6e33649332057f41f8813a86571b06032f1
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50343
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

src/mainboard/amd/majolica/Kconfig

@@ -7,6 +7,7 @@ config BOARD_SPECIFIC_OPTIONS
 	select BOARD_ROMSIZE_KB_16384
 	select SOC_AMD_CEZANNE
 	select AMD_SOC_CONSOLE_UART
+	select MAINBOARD_HAS_CHROMEOS
 
 config FMDFILE
 	string
@@ -21,6 +22,7 @@ config MAINBOARD_PART_NUMBER
 
 config AMD_FWM_POSITION_INDEX
 	int
+	default 3 if CHROMEOS
 	default 4
 	help
 	  TODO: might need to be adapted for better placement of files in cbfs
@@ -37,4 +39,17 @@ config MAJOLICA_MCHP_FW_FILE
 	  The EC firmware blob is usually the first 128kByte of the stock
 	  firmware image.
 
+config VBOOT
+	select VBOOT_NO_BOARD_SUPPORT
+	select VBOOT_SEPARATE_VERSTAGE
+	select VBOOT_STARTS_IN_BOOTBLOCK
+
+config VBOOT_VBNV_OFFSET
+	hex
+	default 0x2A
+
+config CHROMEOS
+	# Use default libpayload config
+	select LP_DEFCONFIG_OVERRIDE if PAYLOAD_DEPTHCHARGE
+
 endif # BOARD_AMD_MAJOLICA

src/mainboard/amd/majolica/chromeos.fmd

@@ -1,14 +1,34 @@
 FLASH@0xFF000000 16M {
-	BIOS {
+	SI_BIOS {
 		EC 128K
-		RW_MRC_CACHE 64K
+		RW_MRC_CACHE(PRESERVE) 64K
-		RW_LEGACY(CBFS) 4K
+		RW_SECTION_A 3M {
-		FW_MAIN_A(CBFS) 1M
 			VBLOCK_A 8K
-		FW_MAIN_B(CBFS) 1M
+			FW_MAIN_A(CBFS)
+			RW_FWID_A 256
+		}
+		RW_SECTION_B 3M {
 			VBLOCK_B 8K
+			FW_MAIN_B(CBFS)
+			RW_FWID_B 256
+		}
+		RW_ELOG(PRESERVE) 4K
+		RW_SHARED 16K {
 			SHARED_DATA 8K
-		FMAP 4K
+			VBLOCK_DEV 8K
+		}
+		RW_VPD(PRESERVE) 8K
+		RW_NVRAM(PRESERVE) 20K
+		SMMSTORE(PRESERVE) 4K
+		RW_LEGACY(CBFS)
+		WP_RO@8M 8M {
+			RO_VPD(PRESERVE) 16K
+			RO_SECTION {
+				FMAP 2K
+				RO_FRID 64
+				GBB@4K 448K
 				COREBOOT(CBFS)
 			}
 		}
+	}
+}