diff --git a/src/mainboard/Kconfig b/src/mainboard/Kconfig
index 1e8d98f8cf..73ca544768 100644
--- a/src/mainboard/Kconfig
+++ b/src/mainboard/Kconfig
@@ -228,6 +228,8 @@ config BOARD_ROMSIZE_KB_4096
 	bool
 config BOARD_ROMSIZE_KB_8192
 	bool
+config BOARD_ROMSIZE_KB_12288
+	bool
 config BOARD_ROMSIZE_KB_16384
 	bool
 
@@ -242,6 +244,7 @@ choice
 	default COREBOOT_ROMSIZE_KB_2048 if BOARD_ROMSIZE_KB_2048
 	default COREBOOT_ROMSIZE_KB_4096 if BOARD_ROMSIZE_KB_4096
 	default COREBOOT_ROMSIZE_KB_8192 if BOARD_ROMSIZE_KB_8192
+	default COREBOOT_ROMSIZE_KB_12288 if BOARD_ROMSIZE_KB_12288
 	default COREBOOT_ROMSIZE_KB_16384 if BOARD_ROMSIZE_KB_16384
 	help
 	  Select the size of the ROM chip you intend to flash coreboot on.
@@ -289,6 +292,11 @@ config COREBOOT_ROMSIZE_KB_8192
 	help
 	  Choose this option if you have a 8192 KB (8 MB) ROM chip.
 
+config COREBOOT_ROMSIZE_KB_12288
+	bool "12288 KB (12 MB)"
+	help
+	  Choose this option if you have a 12288 KB (12 MB) ROM chip.
+
 config COREBOOT_ROMSIZE_KB_16384
 	bool "16384 KB (16 MB)"
 	help
@@ -307,6 +315,7 @@ config COREBOOT_ROMSIZE_KB
 	default 2048 if COREBOOT_ROMSIZE_KB_2048
 	default 4096 if COREBOOT_ROMSIZE_KB_4096
 	default 8192 if COREBOOT_ROMSIZE_KB_8192
+	default 12288 if COREBOOT_ROMSIZE_KB_12288
 	default 16384 if COREBOOT_ROMSIZE_KB_16384
 
 # Map the config names to a hex value (bytes).
@@ -320,6 +329,7 @@ config ROM_SIZE
 	default 0x200000 if COREBOOT_ROMSIZE_KB_2048
 	default 0x400000 if COREBOOT_ROMSIZE_KB_4096
 	default 0x800000 if COREBOOT_ROMSIZE_KB_8192
+	default 0xc00000 if COREBOOT_ROMSIZE_KB_12288
 	default 0x1000000 if COREBOOT_ROMSIZE_KB_16384
 
 config ENABLE_POWER_BUTTON