mb/google/brya: Add flashmap descriptor

BUG=b:174266035
TEST=Build Test

Signed-off-by: Eric Lai <ericr_lai@compal.corp-partner.google.com>
Change-Id: Ia1ba8c997680c60ee1eabfae82459e127f664117
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48062
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/brya/Kconfig.name

@@ -2,3 +2,4 @@ config BOARD_GOOGLE_BRYA0
 	bool "Brya 0"
 	select BOARD_GOOGLE_BASEBOARD_BRYA
 	select BASEBOARD_BRYA_LAPTOP
+	select BOARD_ROMSIZE_KB_32768

src/mainboard/google/brya/chromeos.fmd

@@ -0,0 +1,49 @@
+FLASH@0xfe000000 0x2000000 {
+	SI_ALL@0x0 0x500000 {
+		SI_DESC@0x0 0x1000
+		SI_ME@0x1000 0x4ff000
+	}
+	SI_BIOS@0x500000 0x1b00000 {
+		# Place RW_LEGACY at the start of BIOS region such that the rest
+		# of BIOS regions start at 16MiB boundary. Since this is a 32MiB
+		# SPI flash only the top 16MiB actually gets memory mapped.
+		RW_LEGACY(CBFS)@0x0 0xb00000
+		RW_SECTION_A@0xb00000 0x5e0000 {
+			VBLOCK_A@0x0 0x10000
+			FW_MAIN_A(CBFS)@0x10000 0x32ffc0
+			RW_FWID_A@0x33ffc0 0x40
+			ME_RW_A(CBFS)@0x340000 0x2a0000
+		}
+		RW_SECTION_B@0x10e0000 0x5e0000 {
+			VBLOCK_B@0x0 0x10000
+			FW_MAIN_B(CBFS)@0x10000 0x32ffc0
+			RW_FWID_B@0x33ffc0 0x40
+			ME_RW_B(CBFS)@0x340000 0x2a0000
+		}
+		RW_MISC@0x16c0000 0x40000 {
+			UNIFIED_MRC_CACHE(PRESERVE)@0x0 0x30000 {
+				RECOVERY_MRC_CACHE@0x0 0x10000
+				RW_MRC_CACHE@0x10000 0x20000
+			}
+			RW_ELOG(PRESERVE)@0x30000 0x4000
+			RW_SHARED@0x34000 0x4000 {
+				SHARED_DATA@0x0 0x2000
+				VBLOCK_DEV@0x2000 0x2000
+			}
+			RW_VPD(PRESERVE)@0x38000 0x2000
+			RW_NVRAM(PRESERVE)@0x3a000 0x6000
+		}
+		# Make WP_RO region align with SPI vendor
+		# memory protected range specification.
+		WP_RO@0x1700000 0x400000 {
+			RO_VPD(PRESERVE)@0x0 0x4000
+			RO_SECTION@0x4000 0x3fc000 {
+				FMAP@0x0 0x800
+				RO_FRID@0x800 0x40
+				RO_FRID_PAD@0x840 0x7c0
+				GBB@0x1000 0x3000
+				COREBOOT(CBFS)@0x4000 0x3f8000
+			}
+		}
+	}
+}