mb/google: Set CBFS_SIZE to IFD BIOS size for Intel-based boards

Set CBFS_SIZE to match the SI_BIOS region size defined in each board's
chromeos.fmd file, up to a maximum of 16MiB. This ensures the largest
possible region is available for CBFS use without requiring manual
CBFS_SIZE overrides. The size is capped at 16MiB as that is the
largest area that can be memory mapped, the FIT pointer must be
located in the top 16MiB.

This change applies to all Intel-based Google mainboards with ChromeOS
FMD layouts that explicitly define SI_BIOS region sizes, and which do
not define a default non-ChromeOS FMAP layout (octopus, reef).

For boards with multiple ChromeOS FMD files, CBFS_SIZE is set
conditionally based on ROM size or silicon variant, using the
same logic as to select the ChromeOS FMD file.

This eliminates the need to override CBFS_SIZE when using larger
payloads (e.g., edk2) or multiple payloads, making the default
configuration more flexible.

TEST=build/boot various google boards with edk2 payload without
overriding CBFS_SIZE.

Change-Id: If7ef6cc96afcdd025958c578ad80fd0db641582a
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/90883
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-by: Alicja Michalska <ahplka19@gmail.com>

src/mainboard/google/auron/Kconfig

@@ -71,6 +71,9 @@ config MAINBOARD_PART_NUMBER
 config OVERRIDE_DEVICETREE
 	default "variants/\$(CONFIG_VARIANT_DIR)/overridetree.cb"
 
+config CBFS_SIZE
+	default 0x600000
+
 config MAINBOARD_SMBIOS_MANUFACTURER
 	string
 	default "GOOGLE"

src/mainboard/google/beltino/Kconfig

@@ -66,6 +66,9 @@ config MAINBOARD_FAMILY
 config INTEL_GMA_VBT_FILE
 	default "src/mainboard/\$(MAINBOARDDIR)/data.vbt" if !BOARD_GOOGLE_MONROE
 
+config CBFS_SIZE
+	default 0x600000
+
 config MAINBOARD_SMBIOS_MANUFACTURER
 	string
 	default "GOOGLE"

src/mainboard/google/brox/Kconfig

@@ -213,6 +213,9 @@ config HAVE_WWAN_POWER_SEQUENCE
 config HAVE_PCIE_WWAN
 	def_bool n
 
+config CBFS_SIZE
+	default 0x1000000
+
 config USE_PM_ACPI_TIMER
 	default n
 

src/mainboard/google/brya/Kconfig

@@ -1186,6 +1186,10 @@ config UART_FOR_CONSOLE
 	int
 	default 0
 
+config CBFS_SIZE
+	default 0xc60000 if BOARD_ROMSIZE_KB_16384
+	default 0x1000000 if BOARD_ROMSIZE_KB_32768
+
 config HAVE_WWAN_POWER_SEQUENCE
 	def_bool n
 	help

src/mainboard/google/butterfly/Kconfig

@@ -35,6 +35,9 @@ config MAINBOARD_DIR
 config MAINBOARD_PART_NUMBER
 	default "Butterfly"
 
+config CBFS_SIZE
+	default 0x600000
+
 config MAINBOARD_VENDOR
 	string
 	default "Hewlett-Packard"

src/mainboard/google/dedede/Kconfig

@@ -310,6 +310,10 @@ config FMDFILE
 	default "src/mainboard/\$(CONFIG_MAINBOARD_DIR)/chromeos-dedede-16MiB.fmd" if CHROMEOS && BOARD_ROMSIZE_KB_16384
 	default "src/mainboard/\$(CONFIG_MAINBOARD_DIR)/chromeos-dedede-32MiB.fmd" if CHROMEOS && BOARD_ROMSIZE_KB_32768
 
+config CBFS_SIZE
+	default 0xc7f000 if BOARD_ROMSIZE_KB_16384
+	default 0x1000000 if BOARD_ROMSIZE_KB_32768
+
 config MAINBOARD_DIR
 	default "google/dedede"
 

src/mainboard/google/drallion/Kconfig

@@ -98,4 +98,7 @@ config VBOOT
 config FMDFILE
 	default "src/mainboard/\$(CONFIG_MAINBOARD_DIR)/default.fmd" if !CHROMEOS
 
+config CBFS_SIZE
+	default 0x1000000
+
 endif # BOARD_GOOGLE_BASEBOARD_DRALLION

src/mainboard/google/eve/Kconfig

@@ -74,6 +74,9 @@ config UART_FOR_CONSOLE
 	int
 	default 2
 
+config CBFS_SIZE
+	default 0xe00000
+
 config USE_PM_ACPI_TIMER
 	default n
 endif

src/mainboard/google/fatcat/Kconfig

@@ -244,6 +244,9 @@ config UART_FOR_CONSOLE
 	int
 	default 0
 
+config CBFS_SIZE
+	default 0x1000000
+
 config USE_PM_ACPI_TIMER
 	default n
 

src/mainboard/google/fizz/Kconfig

@@ -102,6 +102,9 @@ config UART_FOR_CONSOLE
 	int
 	default 2
 
+config CBFS_SIZE
+	default 0xe00000
+
 config USE_PM_ACPI_TIMER
 	default n
 

src/mainboard/google/glados/Kconfig

@@ -128,6 +128,9 @@ config UART_FOR_CONSOLE
 	int
 	default 2
 
+config CBFS_SIZE
+	default 0xe00000
+
 config CONSOLE_SERIAL
 	bool
 	default n

src/mainboard/google/hatch/Kconfig

@@ -125,6 +125,10 @@ config FMDFILE
 	default "src/mainboard/\$(CONFIG_MAINBOARD_DIR)/chromeos-16MiB.fmd" if BOARD_ROMSIZE_KB_16384 && CHROMEOS
 	default "src/mainboard/\$(CONFIG_MAINBOARD_DIR)/chromeos-32MiB.fmd" if BOARD_ROMSIZE_KB_32768 && CHROMEOS
 
+config CBFS_SIZE
+	default 0xc00000 if BOARD_ROMSIZE_KB_16384
+	default 0x1000000 if BOARD_ROMSIZE_KB_32768
+
 config MAINBOARD_DIR
 	default "google/hatch"
 

src/mainboard/google/jecht/Kconfig

@@ -55,6 +55,9 @@ config MAINBOARD_PART_NUMBER
 config INTEL_GMA_VBT_FILE
 	default "src/mainboard/\$(MAINBOARDDIR)/data.vbt" if !BOARD_GOOGLE_TIDUS
 
+config CBFS_SIZE
+	default 0x600000
+
 config MAINBOARD_SMBIOS_MANUFACTURER
 	string
 	default "GOOGLE"

src/mainboard/google/kahlee/Kconfig

@@ -103,6 +103,9 @@ config FMDFILE
 	  but in some cases more complex setups are required.
 	  When an fmd is specified, it overrides the default format.
 
+config CBFS_SIZE
+	default 0x1000000
+
 config MAX_CPUS
 	int
 	default 4

src/mainboard/google/link/Kconfig

@@ -38,6 +38,9 @@ config MAINBOARD_DIR
 config MAINBOARD_PART_NUMBER
 	default "Link"
 
+config CBFS_SIZE
+	default 0x600000
+
 config MAINBOARD_SMBIOS_MANUFACTURER
 	string
 	default "GOOGLE"

src/mainboard/google/ocelot/Kconfig

@@ -210,6 +210,9 @@ config UART_FOR_CONSOLE
 	int
 	default 0
 
+config CBFS_SIZE
+	default 0x1000000
+
 config USE_PM_ACPI_TIMER
 	default n
 

src/mainboard/google/parrot/Kconfig

@@ -36,6 +36,9 @@ config MAINBOARD_DIR
 config MAINBOARD_PART_NUMBER
 	default "Parrot"
 
+config CBFS_SIZE
+	default 0x600000
+
 config MAINBOARD_SMBIOS_MANUFACTURER
 	string
 	default "GOOGLE"

src/mainboard/google/poppy/Kconfig

@@ -225,6 +225,9 @@ config UART_FOR_CONSOLE
 	int
 	default 2
 
+config CBFS_SIZE
+	default 0xe00000
+
 config USE_PM_ACPI_TIMER
 	default n
 

src/mainboard/google/puff/Kconfig

@@ -120,6 +120,10 @@ config FMDFILE
 	default "src/mainboard/\$(CONFIG_MAINBOARD_DIR)/chromeos-16MiB.fmd" if BOARD_ROMSIZE_KB_16384 && CHROMEOS
 	default "src/mainboard/\$(CONFIG_MAINBOARD_DIR)/chromeos-32MiB.fmd" if BOARD_ROMSIZE_KB_32768 && CHROMEOS
 
+config CBFS_SIZE
+	default 0xd00000 if BOARD_ROMSIZE_KB_16384
+	default 0x1000000 if BOARD_ROMSIZE_KB_32768
+
 config POWER_OFF_ON_CR50_UPDATE
 	bool
 	default n

src/mainboard/google/rambi/Kconfig

@@ -146,6 +146,9 @@ config MAINBOARD_PART_NUMBER
 config OVERRIDE_DEVICETREE
 	default "variants/\$(CONFIG_VARIANT_DIR)/overridetree.cb"
 
+config CBFS_SIZE
+	default 0x600000
+
 config MAINBOARD_SMBIOS_MANUFACTURER
 	string
 	default "GOOGLE"

src/mainboard/google/rex/Kconfig

@@ -259,6 +259,9 @@ config UART_FOR_CONSOLE
 	int
 	default 0
 
+config CBFS_SIZE
+	default 0x1000000
+
 config OVERRIDE_DEVICETREE
 	default "variants/\$(CONFIG_VARIANT_DIR)/overridetree.cb"
 

src/mainboard/google/sarien/Kconfig

@@ -110,4 +110,7 @@ config VBOOT
 config FMDFILE
 	default "src/mainboard/\$(CONFIG_MAINBOARD_DIR)/default.fmd" if !CHROMEOS
 
+config CBFS_SIZE
+	default 0x1000000
+
 endif # BOARD_GOOGLE_BASEBOARD_SARIEN

src/mainboard/google/slippy/Kconfig

@@ -71,6 +71,9 @@ config OVERRIDE_DEVICETREE
 config INTEL_GMA_VBT_FILE
 	default "src/mainboard/\$(MAINBOARDDIR)/data.vbt"
 
+config CBFS_SIZE
+	default 0x600000
+
 config MAINBOARD_SMBIOS_MANUFACTURER
 	string
 	default "GOOGLE"

src/mainboard/google/stout/Kconfig

@@ -38,6 +38,9 @@ config VGA_BIOS_ID
 	string
 	default "8086,0156"
 
+config CBFS_SIZE
+	default 0x600000
+
 config MAINBOARD_SMBIOS_MANUFACTURER
 	string
 	default "GOOGLE"

src/mainboard/google/volteer/Kconfig

@@ -245,6 +245,9 @@ config VARIANT_DIR
 	default "volteer2" if BOARD_GOOGLE_VOLTEER2_TI50
 	default "voxel" if BOARD_GOOGLE_VOXEL
 
+config CBFS_SIZE
+	default 0x1000000
+
 config USE_PM_ACPI_TIMER
 	default n