experimental edk2 support

now we can have gop support!

add these to a board's target.cfg to enable:

payload_edk2="edk2_mrchromebox"

and add this to build_depend: coreboot/edk2_mrchromebox

as an example, this patch enables it on dell optiplex 5050 sff.

we don't handle downloads of edk2 or submodules in lbmk. we
use coreboot's logic. coreboot's logic doesn't have redundant
git repository backups, and doesn't properly support patching
submodules like lbmk would.

in a future revision, i will add edk2 git repository and submodules
in lbmk directly, and build it using lbmk's own logic.

because of this design, it's set release=n for now. if you build
for a board that enables edk2 when doing ./mk release, or if
you set XBMK_RELEASE=y, and a board is release=n in target.cfg,
that board is skipped; this extends to everything. edk2_mrchromebox
is set release=n.

when release=n and doing ./mk release, payload_edk2 is emptied at
build time. those boards that use it would still build, but only
have e.g. grub, seabios and u-boot.

the coreboot build system is given a fake coreboot target. it actually
is a QEMU setup, and does boot into QEMU, though edk2 is currently
broken on QEMU in my testing. it works on dell optiplex 5050 sff.

edk2 is multi-tree, naturally because it piggybacks off of coreboot
as in this patch. this means i can add other targets with different
edk2 setups. e.g. config/module/coreboot/edk2_foo, then a given
coreboot tree would set payload_edk2="foo"

so long as edk2 is enabled in the coreboot config, it will build
to a custom_*.rom under bin/

the config for coreboot must be named libgfxinit_corebootfb, but
the edk2 build could be used on fspgop and vgarom setups as
well. it is disabled on text-mode setups.

Signed-off-by: Leah Rowe <leah@libreboot.org>

7 files changed, 695 insertions, 6 deletions

diff --git a/config/data/coreboot/build.list b/config/data/coreboot/build.list
index f6535149..55c2ee44 100644
--- a/config/data/coreboot/build.list
+++ b/config/data/coreboot/build.list
@@ -1 +1,2 @@
 build/coreboot.rom
+payloads/external/edk2/workspace/Build/UefiPayloadPkgX64/RELEASE_GCC/FV/UEFIPAYLOAD.fd
diff --git a/config/data/coreboot/mkhelper.cfg b/config/data/coreboot/mkhelper.cfg
index 3c8b18d9..a81db2bf 100644
--- a/config/data/coreboot/mkhelper.cfg
+++ b/config/data/coreboot/mkhelper.cfg
@@ -25,6 +25,7 @@ displaymode=""
 tmprom=""
 newrom=""
 payload_uboot=""
+payload_edk2=""
 cbfscfg=""
 
 premake="corebootpremake"
diff --git a/config/module/coreboot/default/patches/0058-don-t-delete-edk2-builds.patch b/config/module/coreboot/default/patches/0058-don-t-delete-edk2-builds.patch
new file mode 100644
index 00000000..31ef8761
--- /dev/null
+++ b/config/module/coreboot/default/patches/0058-don-t-delete-edk2-builds.patch
@@ -0,0 +1,47 @@
+From fb17486cd4edf6515d93b294546dd1ef4b9c1a3b Mon Sep 17 00:00:00 2001
+From: Leah Rowe <leah@libreboot.org>
+Date: Tue, 22 Sep 2026 08:01:01 +0100
+Subject: [PATCH 1/1] don't delete edk2 builds
+
+lbmk build.list needs to be able to copy this
+
+we rely on the coreboot build system to build
+edk2, by providing a fake coreboot config.
+
+Signed-off-by: Leah Rowe <leah@libreboot.org>
+---
+ payloads/external/edk2/Makefile | 10 +++++-----
+ 1 file changed, 5 insertions(+), 5 deletions(-)
+
+diff --git a/payloads/external/edk2/Makefile b/payloads/external/edk2/Makefile
+index 75b7f7983d..d6f3d98001 100644
+--- a/payloads/external/edk2/Makefile
++++ b/payloads/external/edk2/Makefile
+@@ -413,19 +413,19 @@ $(WORKSPACE)/Build/UefiPayloadPkgIA32/UniversalPayload.fit: \
+ 
+ UefiPayloadPkg: $(WORKSPACE)/Build/UefiPayloadPkgX64/$(RELEASE_STR)_GCC/FV/UEFIPAYLOAD.fd
+ 	mkdir -p $(dir $(EDK2_UEFIPAYLOAD_OUT))
+-	mv $(WORKSPACE)/Build/UefiPayloadPkgX64/$(RELEASE_STR)_GCC/FV/UEFIPAYLOAD.fd \
++	cp $(WORKSPACE)/Build/UefiPayloadPkgX64/$(RELEASE_STR)_GCC/FV/UEFIPAYLOAD.fd \
+ 		$(EDK2_UEFIPAYLOAD_OUT)
+ 
+ UniversalPayload: $(WORKSPACE)/Build/UefiPayloadPkgIA32/UniversalPayload.fit
+ 	mkdir -p $(dir $(EDK2_UNIVERSAL_PAYLOAD_OUT))
+-	mv $(WORKSPACE)/Build/UefiPayloadPkgIA32/UniversalPayload.fit \
++	cp $(WORKSPACE)/Build/UefiPayloadPkgIA32/UniversalPayload.fit \
+ 		$(EDK2_UNIVERSAL_PAYLOAD_OUT)
+ 
+ clean:
+-	test -d $(WORKSPACE) && (cd $(WORKSPACE); rm -rf Build; rm -f Conf/tools_def.txt Conf/CapsuleFmpPkcs7Pcd.inc) || exit 0
++	test -d $(WORKSPACE) && (cd $(WORKSPACE); rm -f Conf/tools_def.txt Conf/CapsuleFmpPkcs7Pcd.inc) || exit 0
+ 
+-distclean:
+-	rm -rf $(WORKSPACE)
++distclean: clean
++	:
+ 
+ .PHONY: $(EDK2_PATH) checktools logo UefiPayloadPkg UniversalPayload clean distclean
+ 
+-- 
+2.47.3
+
diff --git a/config/module/coreboot/dell5050sff_vfsp_16mb/target.cfg b/config/module/coreboot/dell5050sff_vfsp_16mb/target.cfg
index 7d3b46e2..3fd463f0 100644
--- a/config/module/coreboot/dell5050sff_vfsp_16mb/target.cfg
+++ b/config/module/coreboot/dell5050sff_vfsp_16mb/target.cfg
@@ -8,6 +8,7 @@ payload_memtest="y"
 grub_scan_disk="nvme ahci"
 grubtree="xhci_nvme"
 vcfg="5050sff"
-build_depend="seabios/build grub/xhci_nvme memtest86plus/default u-boot/amd64coreboot"
+build_depend="seabios/build grub/xhci_nvme memtest86plus/default u-boot/amd64coreboot coreboot/edk2_mrchromebox"
 IFD_platform="sklkbl"
 payload_uboot="amd64"
+payload_edk2="edk2_mrchromebox"
diff --git a/config/module/coreboot/edk2_mrchromebox/config/libgfxinit_corebootfb b/config/module/coreboot/edk2_mrchromebox/config/libgfxinit_corebootfb
new file mode 100644
index 00000000..dc125eec
--- /dev/null
+++ b/config/module/coreboot/edk2_mrchromebox/config/libgfxinit_corebootfb
@@ -0,0 +1,600 @@
+#
+# Automatically generated file; DO NOT EDIT.
+# coreboot configuration
+#
+
+#
+# General setup
+#
+CONFIG_LOCALVERSION=""
+CONFIG_CBFS_PREFIX="fallback"
+CONFIG_COMPILER_GCC=y
+# CONFIG_COMPILER_LLVM_CLANG is not set
+# CONFIG_ANY_TOOLCHAIN is not set
+# CONFIG_CCACHE is not set
+# CONFIG_LTO is not set
+# CONFIG_IWYU is not set
+# CONFIG_FMD_GENPARSER is not set
+# CONFIG_UTIL_GENPARSER is not set
+# CONFIG_OPTION_BACKEND_NONE is not set
+# CONFIG_USE_OPTION_TABLE is not set
+CONFIG_USE_CBFS_FILE_OPTION_BACKEND=y
+CONFIG_COMPRESS_RAMSTAGE_LZMA=y
+# CONFIG_COMPRESS_RAMSTAGE_LZ4 is not set
+# CONFIG_COMPRESS_RAMSTAGE_ZSTD is not set
+CONFIG_SEPARATE_ROMSTAGE=y
+CONFIG_INCLUDE_CONFIG_FILE=y
+CONFIG_COLLECT_TIMESTAMPS=y
+# CONFIG_TIMESTAMPS_ON_CONSOLE is not set
+CONFIG_USE_BLOBS=y
+# CONFIG_USE_AMD_BLOBS is not set
+# CONFIG_USE_QC_BLOBS is not set
+# CONFIG_COVERAGE is not set
+# CONFIG_UBSAN is not set
+CONFIG_HAVE_ASAN_IN_ROMSTAGE=y
+CONFIG_HAVE_ASAN_IN_RAMSTAGE=y
+# CONFIG_ASAN is not set
+CONFIG_NO_STAGE_CACHE=y
+# CONFIG_CBMEM_STAGE_CACHE is not set
+# CONFIG_UPDATE_IMAGE is not set
+# CONFIG_BOOTSPLASH_IMAGE is not set
+
+#
+# Software Bill Of Materials (SBOM)
+#
+# CONFIG_SBOM is not set
+# end of Software Bill Of Materials (SBOM)
+# end of General setup
+
+#
+# Mainboard
+#
+
+#
+# Important: Run 'make distclean' before switching boards
+#
+# CONFIG_VENDOR_51NB is not set
+# CONFIG_VENDOR_ACER is not set
+# CONFIG_VENDOR_AMD is not set
+# CONFIG_VENDOR_AOOSTAR is not set
+# CONFIG_VENDOR_AOPEN is not set
+# CONFIG_VENDOR_APPLE is not set
+# CONFIG_VENDOR_ARM is not set
+# CONFIG_VENDOR_ASROCK is not set
+# CONFIG_VENDOR_ASUS is not set
+# CONFIG_VENDOR_BIOSTAR is not set
+# CONFIG_VENDOR_BOSTENTECH is not set
+# CONFIG_VENDOR_BYTEDANCE is not set
+# CONFIG_VENDOR_CAVIUM is not set
+# CONFIG_VENDOR_CLEVO is not set
+# CONFIG_VENDOR_COMPULAB is not set
+# CONFIG_VENDOR_CWWK is not set
+# CONFIG_VENDOR_DELL is not set
+CONFIG_VENDOR_EMULATION=y
+# CONFIG_VENDOR_ERYING is not set
+# CONFIG_VENDOR_EXAMPLE is not set
+# CONFIG_VENDOR_FACEBOOK is not set
+# CONFIG_VENDOR_FOXCONN is not set
+# CONFIG_VENDOR_FRAMEWORK is not set
+# CONFIG_VENDOR_GETAC is not set
+# CONFIG_VENDOR_GIGABYTE is not set
+# CONFIG_VENDOR_GOOGLE is not set
+# CONFIG_VENDOR_HARDKERNEL is not set
+# CONFIG_VENDOR_HP is not set
+# CONFIG_VENDOR_IBASE is not set
+# CONFIG_VENDOR_IBM is not set
+# CONFIG_VENDOR_INTEL is not set
+# CONFIG_VENDOR_INVENTEC is not set
+# CONFIG_VENDOR_KONTRON is not set
+# CONFIG_VENDOR_LATTEPANDA is not set
+# CONFIG_VENDOR_LENOVO is not set
+# CONFIG_VENDOR_LIBRETREND is not set
+# CONFIG_VENDOR_MITAC_COMPUTING is not set
+# CONFIG_VENDOR_MSI is not set
+# CONFIG_VENDOR_NOVACUSTOM is not set
+# CONFIG_VENDOR_NVIDIA is not set
+# CONFIG_VENDOR_OCP is not set
+# CONFIG_VENDOR_OPENCELLULAR is not set
+# CONFIG_VENDOR_PACKARDBELL is not set
+# CONFIG_VENDOR_PCENGINES is not set
+# CONFIG_VENDOR_PINE64 is not set
+# CONFIG_VENDOR_PORTWELL is not set
+# CONFIG_VENDOR_PRODRIVE is not set
+# CONFIG_VENDOR_PROTECTLI is not set
+# CONFIG_VENDOR_PURISM is not set
+# CONFIG_VENDOR_QOTOM is not set
+# CONFIG_VENDOR_RAPTOR_CS is not set
+# CONFIG_VENDOR_RAZER is not set
+# CONFIG_VENDOR_RODA is not set
+# CONFIG_VENDOR_SAMSUNG is not set
+# CONFIG_VENDOR_SAPPHIRE is not set
+# CONFIG_VENDOR_SIEMENS is not set
+# CONFIG_VENDOR_SIFIVE is not set
+# CONFIG_VENDOR_STARLABS is not set
+# CONFIG_VENDOR_SUPERMICRO is not set
+# CONFIG_VENDOR_SYSTEM76 is not set
+# CONFIG_VENDOR_TI is not set
+# CONFIG_VENDOR_TOPTON is not set
+# CONFIG_VENDOR_UP is not set
+# CONFIG_VENDOR_VIA is not set
+CONFIG_BOARD_SPECIFIC_OPTIONS=y
+CONFIG_MAINBOARD_PART_NUMBER="edk2 crash test dummy"
+CONFIG_MAINBOARD_VERSION="01189998819991197253"
+CONFIG_MAINBOARD_DIR="emulation/qemu-i440fx"
+CONFIG_DIMM_MAX=4
+CONFIG_DIMM_SPD_SIZE=256
+CONFIG_FMDFILE=""
+# CONFIG_NO_POST is not set
+CONFIG_MAINBOARD_VENDOR="edk2 crash test dummy corporation"
+CONFIG_CBFS_SIZE=0xFFFFFF
+CONFIG_CONSOLE_SERIAL=y
+CONFIG_MAX_CPUS=4
+# CONFIG_ONBOARD_VGA_IS_PRIMARY is not set
+CONFIG_POST_DEVICE=y
+CONFIG_POST_IO=y
+CONFIG_UART_FOR_CONSOLE=0
+CONFIG_OVERRIDE_DEVICETREE=""
+CONFIG_DEVICETREE="devicetree.cb"
+# CONFIG_VBOOT is not set
+CONFIG_VBOOT_VBNV_OFFSET=0x2c
+CONFIG_IRQ_SLOT_COUNT=6
+# CONFIG_VGA_BIOS is not set
+CONFIG_PCIEXP_ASPM=y
+CONFIG_PCIEXP_CLK_PM=y
+CONFIG_MAINBOARD_SMBIOS_MANUFACTURER="EDK2 CRASH TEST DUMMY CORPORATION"
+CONFIG_MEMLAYOUT_LD_FILE="src/arch/x86/memlayout.ld"
+# CONFIG_FATAL_ASSERTS is not set
+CONFIG_PRERAM_CBMEM_CONSOLE_SIZE=0xc00
+CONFIG_MAINBOARD_SMBIOS_PRODUCT_NAME="EDK2 CRASH TEST DUMMY"
+# CONFIG_CONSOLE_POST is not set
+CONFIG_MAX_SOCKET=1
+CONFIG_CMOS_DEFAULT_FILE="src/mainboard/$(MAINBOARDDIR)/cmos.default"
+CONFIG_CMOS_LAYOUT_FILE="src/mainboard/$(MAINBOARDDIR)/cmos.layout"
+# CONFIG_BOARD_EMULATION_QEMU_AARCH64 is not set
+# CONFIG_BOARD_EMULATION_QEMU_ARMV7 is not set
+CONFIG_BOARD_EMULATION_QEMU_X86_I440FX=y
+# CONFIG_BOARD_EMULATION_QEMU_POWER8 is not set
+# CONFIG_BOARD_EMULATION_QEMU_POWER9 is not set
+# CONFIG_BOARD_EMULATION_QEMU_X86_Q35 is not set
+# CONFIG_BOARD_EMULATION_QEMU_RISCV_RV64 is not set
+# CONFIG_BOARD_EMULATION_QEMU_RISCV_RV32 is not set
+# CONFIG_BOARD_EMULATION_QEMU_SBSA is not set
+# CONFIG_BOARD_EMULATION_SPIKE_RISCV is not set
+CONFIG_DCACHE_RAM_BASE=0x10000
+CONFIG_DCACHE_RAM_SIZE=0x90000
+CONFIG_C_ENV_BOOTBLOCK_SIZE=0x10000
+CONFIG_DCACHE_BSP_STACK_SIZE=0x4000
+CONFIG_MAX_ACPI_TABLE_SIZE_KB=144
+CONFIG_DRIVERS_INTEL_WIFI=y
+CONFIG_D3COLD_SUPPORT=y
+CONFIG_RAMSTAGE_CBFS_CACHE_SIZE=0x4000
+CONFIG_MAINBOARD_SERIAL_NUMBER="01189998819991197253"
+CONFIG_CONSOLE_CBMEM_BUFFER_SIZE=0x20000
+CONFIG_SYSTEM_SMBIOS_MANUFACTURER="EDK2 CRASH TEST CORPORATION"
+CONFIG_EDK2_BOOT_TIMEOUT=2
+CONFIG_PLATFORM_POST_RENDER_DELAY_SEC=5
+CONFIG_CARDBUS_PLUGIN_SUPPORT=y
+CONFIG_PS2K_EISAID="PNP0303"
+CONFIG_PS2M_EISAID="PNP0F13"
+CONFIG_EDK2_BOOT_MANAGER_ESCAPE=y
+CONFIG_EDK2_FOLLOW_BGRT_SPEC=y
+# CONFIG_EDK2_FULL_SCREEN_SETUP is not set
+CONFIG_TTYS0_BAUD=115200
+CONFIG_DRIVERS_UART_8250IO=y
+CONFIG_PC_CMOS_BASE_PORT_BANK1=0x72
+CONFIG_HEAP_SIZE=0x100000
+CONFIG_EDK2_BOOTSPLASH_FILE="Documentation/coreboot_logo.bmp"
+CONFIG_USE_PC_CMOS_ALTCENTURY=y
+# CONFIG_DRIVERS_EFI_FW_INFO is not set
+CONFIG_BOARD_ROMSIZE_KB_4096=y
+# CONFIG_COREBOOT_ROMSIZE_KB_256 is not set
+# CONFIG_COREBOOT_ROMSIZE_KB_512 is not set
+# CONFIG_COREBOOT_ROMSIZE_KB_1024 is not set
+# CONFIG_COREBOOT_ROMSIZE_KB_2048 is not set
+# CONFIG_COREBOOT_ROMSIZE_KB_4096 is not set
+# CONFIG_COREBOOT_ROMSIZE_KB_5120 is not set
+# CONFIG_COREBOOT_ROMSIZE_KB_6144 is not set
+# CONFIG_COREBOOT_ROMSIZE_KB_8192 is not set
+# CONFIG_COREBOOT_ROMSIZE_KB_10240 is not set
+# CONFIG_COREBOOT_ROMSIZE_KB_12288 is not set
+CONFIG_COREBOOT_ROMSIZE_KB_16384=y
+# CONFIG_COREBOOT_ROMSIZE_KB_24576 is not set
+# CONFIG_COREBOOT_ROMSIZE_KB_32768 is not set
+# CONFIG_COREBOOT_ROMSIZE_KB_65536 is not set
+CONFIG_COREBOOT_ROMSIZE_KB=16384
+CONFIG_ROM_SIZE=0x01000000
+# end of Mainboard
+
+#
+# Chipset
+#
+
+#
+# SoC
+#
+CONFIG_CHIPSET_DEVICETREE=""
+CONFIG_CBFS_MCACHE_SIZE=0x4000
+CONFIG_ROMSTAGE_ADDR=0x2000000
+CONFIG_VERSTAGE_ADDR=0x2000000
+# CONFIG_USE_X86_64_SUPPORT is not set
+CONFIG_CPU_PT_ROM_MAP_GB=4
+CONFIG_PRERAM_CBFS_CACHE_SIZE=0x4000
+CONFIG_DOMAIN_RESOURCE_32BIT_LIMIT=0xfe000000
+CONFIG_ACPI_CPU_STRING="CP%02X"
+CONFIG_STACK_SIZE=0x2000
+CONFIG_INTEL_GMA_BCLV_OFFSET=0xc8254
+CONFIG_INTEL_GMA_BCLV_WIDTH=16
+CONFIG_INTEL_GMA_BCLM_OFFSET=0xc8256
+CONFIG_INTEL_GMA_BCLM_WIDTH=16
+CONFIG_BOOTBLOCK_IN_CBFS=y
+CONFIG_SOC_PHYSICAL_ADDRESS_WIDTH=0
+CONFIG_CBFS_CACHE_ALIGN=8
+# CONFIG_ALWAYS_ALLOW_ABOVE_4G_ALLOCATION is not set
+CONFIG_FIXED_SMBUS_IO_BASE=0x400
+CONFIG_UART_BITBANG_TX_DELAY_MS=5
+
+#
+# CPU
+#
+CONFIG_CPU_QEMU_X86=y
+CONFIG_PARALLEL_MP=y
+CONFIG_XAPIC_ONLY=y
+# CONFIG_X2APIC_ONLY is not set
+# CONFIG_X2APIC_RUNTIME is not set
+# CONFIG_X2APIC_LATE_WORKAROUND is not set
+CONFIG_UDELAY_TSC=y
+CONFIG_UNKNOWN_TSC_RATE=y
+CONFIG_TSC_MONOTONIC_TIMER=y
+CONFIG_NO_SMM=y
+CONFIG_NEED_SMALL_2MB_PAGE_TABLES=y
+CONFIG_SMM_PCI_RESOURCE_STORE_NUM_SLOTS=8
+CONFIG_AP_STACK_SIZE=0x800
+CONFIG_SMP=y
+
+#
+# Northbridge
+#
+
+#
+# Southbridge
+#
+# CONFIG_PCIEXP_HOTPLUG is not set
+CONFIG_SOUTHBRIDGE_INTEL_I82371EB=y
+CONFIG_PCIEXP_COMMON_CLOCK=y
+CONFIG_SOUTHBRIDGE_INTEL_COMMON_RESET=y
+CONFIG_SOUTHBRIDGE_INTEL_COMMON_RTC=y
+CONFIG_SOUTHBRIDGE_INTEL_COMMON_SMBUS=y
+CONFIG_FIXED_RCBA_MMIO_BASE=0xfed1c000
+CONFIG_RCBA_LENGTH=0x4000
+
+#
+# Super I/O
+#
+
+#
+# Embedded Controllers
+#
+CONFIG_ACPI_FNKEY_GEN_SCANCODE=0
+CONFIG_ARCH_X86=y
+CONFIG_ARCH_BOOTBLOCK_X86_32=y
+CONFIG_ARCH_VERSTAGE_X86_32=y
+CONFIG_ARCH_ROMSTAGE_X86_32=y
+CONFIG_ARCH_POSTCAR_X86_32=y
+CONFIG_ARCH_RAMSTAGE_X86_32=y
+CONFIG_ARCH_ALL_STAGES_X86_32=y
+CONFIG_HAVE_X86_64_SUPPORT=y
+CONFIG_X86_TOP4G_BOOTMEDIA_MAP=y
+CONFIG_POSTRAM_CBFS_CACHE_IN_BSS=y
+CONFIG_PC80_SYSTEM=y
+CONFIG_HAVE_CMOS_DEFAULT=y
+CONFIG_POSTCAR_STAGE=y
+CONFIG_BOOTBLOCK_SIMPLE=y
+# CONFIG_BOOTBLOCK_NORMAL is not set
+CONFIG_COLLECT_TIMESTAMPS_TSC=y
+CONFIG_IDT_IN_EVERY_STAGE=y
+CONFIG_HAVE_CF9_RESET=y
+CONFIG_DEBUG_HW_BREAKPOINTS=y
+CONFIG_DEBUG_HW_BREAKPOINTS_IN_ALL_STAGES=y
+CONFIG_DEBUG_NULL_DEREF_BREAKPOINTS=y
+CONFIG_DEBUG_NULL_DEREF_BREAKPOINTS_IN_ALL_STAGES=y
+# CONFIG_DUMP_SMBIOS_TYPE17 is not set
+CONFIG_X86_BOOTBLOCK_EXTRA_PROGRAM_SZ=0
+CONFIG_DEFAULT_EBDA_LOWMEM=0x100000
+CONFIG_DEFAULT_EBDA_SEGMENT=0xF600
+CONFIG_DEFAULT_EBDA_SIZE=0x400
+CONFIG_IOAPIC=y
+# end of Chipset
+
+#
+# Devices
+#
+CONFIG_HAVE_VGA_TEXT_FRAMEBUFFER=y
+CONFIG_HAVE_LINEAR_FRAMEBUFFER=y
+CONFIG_MAINBOARD_HAS_NATIVE_VGA_INIT=y
+CONFIG_MAINBOARD_FORCE_NATIVE_VGA_INIT=y
+CONFIG_MAINBOARD_DO_NATIVE_VGA_INIT=y
+CONFIG_NO_EARLY_GFX_INIT=y
+CONFIG_ON_DEVICE_ROM_LOAD=y
+
+#
+# Display
+#
+CONFIG_WANT_LINEAR_FRAMEBUFFER=y
+# CONFIG_VGA_TEXT_FRAMEBUFFER is not set
+CONFIG_GENERIC_LINEAR_FRAMEBUFFER=y
+CONFIG_LINEAR_FRAMEBUFFER=y
+# CONFIG_BOOTSPLASH is not set
+CONFIG_DEFAULT_SCREEN_ROTATION_INT=0
+# end of Display
+
+CONFIG_PCI=y
+CONFIG_NO_ECAM_MMCONF_SUPPORT=y
+CONFIG_PCIX_PLUGIN_SUPPORT=y
+CONFIG_PCIEXP_PLUGIN_SUPPORT=y
+CONFIG_PCI_ALLOW_BUS_MASTER=y
+CONFIG_PCI_SET_BUS_MASTER_PCI_BRIDGES=y
+CONFIG_PCI_ALLOW_BUS_MASTER_ANY_DEVICE=y
+# CONFIG_PCIEXP_LANE_ERR_STAT_CLEAR is not set
+# CONFIG_EARLY_PCI_BRIDGE is not set
+CONFIG_SUBSYSTEM_VENDOR_ID=0x0000
+CONFIG_SUBSYSTEM_DEVICE_ID=0x0000
+# CONFIG_SOFTWARE_I2C is not set
+CONFIG_I2C_TRANSFER_TIMEOUT_US=500000
+CONFIG_RESOURCE_ALLOCATION_TOP_DOWN=y
+# end of Devices
+
+#
+# Generic Drivers
+#
+CONFIG_CRB_TPM_BASE_ADDRESS=0xfed40000
+# CONFIG_DRIVERS_EFI_VARIABLE_STORE is not set
+# CONFIG_ELOG is not set
+# CONFIG_DRIVERS_HWID_DMI is not set
+# CONFIG_DRIVERS_OPTION_CFR is not set
+# CONFIG_SELF_TEST is not set
+CONFIG_DRIVERS_UART=y
+# CONFIG_DRIVERS_UART_OXPCIE is not set
+# CONFIG_VPD is not set
+CONFIG_DRIVERS_EMULATION_QEMU_BOCHS=y
+CONFIG_DRIVERS_EMULATION_QEMU_CIRRUS=y
+CONFIG_DRIVERS_EMULATION_QEMU_XRES=800
+CONFIG_DRIVERS_EMULATION_QEMU_YRES=600
+CONFIG_DRIVERS_EMULATION_QEMU_FW_CFG=y
+# CONFIG_DRIVERS_GENERIC_CBFS_SERIAL is not set
+# CONFIG_DRIVERS_GENERIC_CBFS_UUID is not set
+# CONFIG_DRIVERS_GENESYSLOGIC_GL9750 is not set
+# CONFIG_DRIVERS_GENESYSLOGIC_GL9755 is not set
+# CONFIG_DRIVERS_GENESYSLOGIC_GL9763E is not set
+# CONFIG_DRIVERS_I2C_MAX98396 is not set
+# CONFIG_DRIVERS_NXP_UWB_SR1XX is not set
+# CONFIG_DRIVERS_PS2_KEYBOARD is not set
+CONFIG_DRIVERS_MC146818=y
+CONFIG_PC_CMOS_BASE_PORT_BANK0=0x70
+CONFIG_VGA=y
+# CONFIG_DRIVERS_SIL_3114 is not set
+CONFIG_DRIVERS_WIFI_GENERIC=y
+CONFIG_DRIVERS_MTK_WIFI=y
+# end of Generic Drivers
+
+#
+# Security
+#
+
+#
+# CBFS verification
+#
+# CONFIG_CBFS_VERIFICATION is not set
+# end of CBFS verification
+
+#
+# Verified Boot (vboot)
+#
+# end of Verified Boot (vboot)
+
+#
+# Trusted Platform Module
+#
+CONFIG_NO_TPM=y
+CONFIG_PCR_BOOT_MODE=1
+CONFIG_PCR_HWID=1
+CONFIG_PCR_SRTM=2
+CONFIG_PCR_FW_VER=10
+CONFIG_PCR_RUNTIME_DATA=3
+# end of Trusted Platform Module
+
+#
+# TCG storage
+#
+# end of TCG storage
+
+#
+# Memory initialization
+#
+CONFIG_PLATFORM_HAS_DRAM_CLEAR=y
+# CONFIG_SECURITY_CLEAR_DRAM_ON_REGULAR_BOOT is not set
+# end of Memory initialization
+
+CONFIG_BOOTMEDIA_LOCK_NONE=y
+# CONFIG_BOOTMEDIA_LOCK_CONTROLLER is not set
+# CONFIG_BOOTMEDIA_LOCK_CHIP is not set
+# end of Security
+
+CONFIG_ACPI_HAVE_PCAT_8259=y
+CONFIG_ACPI_INTEL_HARDWARE_SLEEP_VALUES=y
+CONFIG_ACPI_NO_CUSTOM_MADT=y
+CONFIG_ACPI_COMMON_MADT_LAPIC=y
+CONFIG_ACPI_COMMON_MADT_IOAPIC=y
+CONFIG_HAVE_ACPI_TABLES=y
+CONFIG_BOOT_DEVICE_NOT_SPI_FLASH=y
+CONFIG_BOOT_DEVICE_MEMORY_MAPPED=y
+CONFIG_BOOT_DEVICE_SUPPORTS_WRITES=y
+
+#
+# Console
+#
+CONFIG_BOOTBLOCK_CONSOLE=y
+CONFIG_POSTCAR_CONSOLE=y
+CONFIG_SQUELCH_EARLY_SMP=y
+
+#
+# I/O mapped, 8250-compatible
+#
+CONFIG_TTYS0_BASE=0x3f8
+
+#
+# Serial port base address = 0x3f8
+#
+# CONFIG_CONSOLE_SERIAL_921600 is not set
+# CONFIG_CONSOLE_SERIAL_460800 is not set
+# CONFIG_CONSOLE_SERIAL_230400 is not set
+CONFIG_CONSOLE_SERIAL_115200=y
+# CONFIG_CONSOLE_SERIAL_57600 is not set
+# CONFIG_CONSOLE_SERIAL_38400 is not set
+# CONFIG_CONSOLE_SERIAL_19200 is not set
+# CONFIG_CONSOLE_SERIAL_9600 is not set
+CONFIG_TTYS0_LCS=3
+# CONFIG_SPKMODEM is not set
+# CONFIG_CONSOLE_NE2K is not set
+CONFIG_CONSOLE_CBMEM=y
+# CONFIG_CONSOLE_I2C_SMBUS is not set
+CONFIG_CONSOLE_QEMU_DEBUGCON=y
+CONFIG_CONSOLE_QEMU_DEBUGCON_PORT=0x402
+# CONFIG_DEFAULT_CONSOLE_LOGLEVEL_8 is not set
+CONFIG_DEFAULT_CONSOLE_LOGLEVEL_7=y
+# CONFIG_DEFAULT_CONSOLE_LOGLEVEL_6 is not set
+# CONFIG_DEFAULT_CONSOLE_LOGLEVEL_5 is not set
+# CONFIG_DEFAULT_CONSOLE_LOGLEVEL_4 is not set
+# CONFIG_DEFAULT_CONSOLE_LOGLEVEL_3 is not set
+# CONFIG_DEFAULT_CONSOLE_LOGLEVEL_2 is not set
+# CONFIG_DEFAULT_CONSOLE_LOGLEVEL_1 is not set
+# CONFIG_DEFAULT_CONSOLE_LOGLEVEL_0 is not set
+CONFIG_DEFAULT_CONSOLE_LOGLEVEL=7
+CONFIG_CONSOLE_USE_LOGLEVEL_PREFIX=y
+CONFIG_CONSOLE_USE_ANSI_ESCAPES=y
+# CONFIG_CMOS_POST is not set
+CONFIG_POST_DEVICE_NONE=y
+# CONFIG_POST_DEVICE_LPC is not set
+# CONFIG_POST_DEVICE_PCI_PCIE is not set
+CONFIG_POST_IO_PORT=0x80
+CONFIG_HWBASE_DEBUG_CB=y
+# end of Console
+
+CONFIG_HAVE_MONOTONIC_TIMER=y
+CONFIG_HAVE_OPTION_TABLE=y
+CONFIG_HAVE_PIRQ_TABLE=y
+
+#
+# System tables
+#
+CONFIG_GENERATE_PIRQ_TABLE=y
+CONFIG_GENERATE_SMBIOS_TABLES=y
+CONFIG_BIOS_VENDOR="leahboot"
+# end of System tables
+
+#
+# Payload
+#
+# CONFIG_PAYLOAD_NONE is not set
+# CONFIG_PAYLOAD_ELF is not set
+# CONFIG_PAYLOAD_FLAT_BINARY is not set
+# CONFIG_PAYLOAD_BOOTBOOT is not set
+# CONFIG_PAYLOAD_CRABEFI is not set
+# CONFIG_PAYLOAD_FILO is not set
+# CONFIG_PAYLOAD_GRUB2 is not set
+# CONFIG_PAYLOAD_SEAGRUB is not set
+# CONFIG_PAYLOAD_LINUXBOOT is not set
+# CONFIG_PAYLOAD_SEABIOS is not set
+# CONFIG_PAYLOAD_UBOOT is not set
+CONFIG_PAYLOAD_EDK2=y
+# CONFIG_PAYLOAD_LINUX is not set
+CONFIG_PAYLOAD_FILE="build/UEFIPAYLOAD.fd"
+CONFIG_EDK2_UEFIPAYLOAD=y
+# CONFIG_EDK2_UNIVERSAL_PAYLOAD is not set
+CONFIG_EDK2_REPO_MRCHROMEBOX=y
+# CONFIG_EDK2_REPO_OFFICIAL is not set
+# CONFIG_EDK2_REPO_CUSTOM is not set
+CONFIG_EDK2_REPOSITORY="https://github.com/mrchromebox/edk2"
+CONFIG_EDK2_TAG_OR_REV="26.09"
+# CONFIG_EDK2_USE_EDK2_PLATFORMS is not set
+# CONFIG_EDK2_DEBUG is not set
+CONFIG_EDK2_RELEASE=y
+# CONFIG_EDK2_CBMEM_LOGGING is not set
+CONFIG_EDK2_HAVE_EFI_SHELL=y
+CONFIG_EDK2_PRIORITIZE_INTERNAL=y
+# CONFIG_EDK2_LOAD_OPTION_ROMS is not set
+CONFIG_EDK2_PS2_SUPPORT=y
+CONFIG_EDK2_SD_MMC_TIMEOUT=10
+# CONFIG_EDK2_SERIAL_SUPPORT is not set
+CONFIG_EDK2_USE_LVGL_RENDERER=y
+# CONFIG_EDK2_DISABLE_TPM is not set
+# CONFIG_EDK2_USE_LAPIC_TIMER is not set
+CONFIG_EDK2_CUSTOM_BUILD_PARAMS=""
+# CONFIG_EDK2_ENABLE_IPXE is not set
+# CONFIG_PXE is not set
+# CONFIG_COMPRESSED_PAYLOAD_NONE is not set
+CONFIG_COMPRESSED_PAYLOAD_LZMA=y
+# CONFIG_COMPRESSED_PAYLOAD_ZSTD is not set
+# CONFIG_COMPRESSED_PAYLOAD_LZ4 is not set
+CONFIG_COMPRESS_SECONDARY_PAYLOAD=y
+
+#
+# Secondary Payloads
+#
+# CONFIG_COREINFO_SECONDARY_PAYLOAD is not set
+# CONFIG_GRUB2_SECONDARY_PAYLOAD is not set
+# CONFIG_MEMTEST_SECONDARY_PAYLOAD is not set
+# CONFIG_NVRAMCUI_SECONDARY_PAYLOAD is not set
+# CONFIG_SEABIOS_SECONDARY_PAYLOAD is not set
+# CONFIG_TINT_SECONDARY_PAYLOAD is not set
+# CONFIG_COREDOOM_SECONDARY_PAYLOAD is not set
+# end of Secondary Payloads
+# end of Payload
+
+#
+# Debugging
+#
+
+#
+# CPU Debug Settings
+#
+# CONFIG_DISPLAY_MTRRS is not set
+
+#
+# Vendorcode Debug Settings
+#
+
+#
+# BLOB Debug Settings
+#
+
+#
+# General Debug Settings
+#
+# CONFIG_GDB_STUB is not set
+# CONFIG_DEBUG_CBFS is not set
+# CONFIG_DEBUG_PIRQ is not set
+CONFIG_HAVE_DEBUG_SMBUS=y
+# CONFIG_DEBUG_SMBUS is not set
+# CONFIG_DEBUG_MALLOC is not set
+# CONFIG_DEBUG_CONSOLE_INIT is not set
+# CONFIG_DEBUG_BOOT_STATE is not set
+# CONFIG_DEBUG_ADA_CODE is not set
+# CONFIG_DEBUG_ACPICA_COMPATIBLE is not set
+# end of Debugging
+
+CONFIG_DECOMPRESS_OFAST=y
+CONFIG_PROBE_RAM=y
+
+#
+# Boot Logo Configuration
+#
+# CONFIG_BMP_LOGO is not set
+# CONFIG_PLATFORM_HAS_SECONDARY_BOOT_INDICATOR_LOGO is not set
+# CONFIG_FRAMEBUFFER_SPLASH_TEXT is not set
+# end of Boot Logo Configuration
+
+CONFIG_MAX_REBOOT_CNT=3
+CONFIG_RELOCATABLE_MODULES=y
+CONFIG_HAVE_BOOTBLOCK=y
+CONFIG_HAVE_ROMSTAGE=y
+CONFIG_HAVE_RAMSTAGE=y
diff --git a/config/module/coreboot/edk2_mrchromebox/target.cfg b/config/module/coreboot/edk2_mrchromebox/target.cfg
new file mode 100644
index 00000000..44324ba3
--- /dev/null
+++ b/config/module/coreboot/edk2_mrchromebox/target.cfg
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+xarch="i386-elf"
+
+tree="default"
+
+release="n"
diff --git a/include/fw/rom.sh b/include/fw/rom.sh
index df37fdcf..5f98040a 100644
--- a/include/fw/rom.sh
+++ b/include/fw/rom.sh
@@ -122,6 +122,9 @@ mkcorebootbin_real()
 {
 	[ "$target" = "$tree" ] && return 0
 
+	[ "$XBMK_RELEASE" = "y" ] \
+		payload_edk2="" # source-only payload, for now.
+
 	tmprom="$xbtmp/coreboot.rom"
 
 	initmode="${buildcfg##*/}"
@@ -142,9 +145,6 @@ mkcorebootbin_real()
 		elfrom="${elfrom}_$displaymode"
 	elfrom="$elfrom/coreboot.rom"
 
-	$if_not_skip_build x_ cp "$elfrom" "$tmprom"
-	$if_not_skip_build unpad_one_byte "$tmprom"
-
 	[ -n "$payload_uboot" ] && [ "$payload_uboot" != "amd64" ] && \
 	    [ "$payload_uboot" != "i386" ] && [ "$payload_uboot" != "arm64" ] \
 		&& err "'$target' defines bad u-boot type '$payload_uboot'" \
@@ -177,10 +177,22 @@ mkcorebootbin_real()
 	[ "$payload_grub" != "y" ] && \
 		payload_grubsea="n"
 
-	[ -f "$cbfscfg" ] && \
-		$if_not_skip_build dx_ add_cbfs_option "$cbfscfg"
+	if [ "$initmode" != "libgfxinit" ] || \
+	    [ "$displaymode" != "corebootfb" ]; then
+		[ "$initmode" != "fspgop" ] && [ "$initmode" != "normal" ] && \
+		    payload_edk2="" # disable on txtmode
+	fi
+
+	$if_not_skip_build prep_tmprom
 
 	if grep "CONFIG_PAYLOAD_NONE=y" "$buildcfg"; then
+		if [ -n "$payload_edk2" ]; then
+			pname="edk2"
+			$if_not_skip_build add_edk2 "fallback/payload"
+			$if_not_skip_build cprom # standalone edk2
+
+			$if_not_skip_build prep_tmprom
+		fi
 		if [ "$payload_seabios" = "y" ]; then
 			pname="seabios"
 			$if_not_skip_build add_seabios
@@ -196,6 +208,15 @@ mkcorebootbin_real()
 	fi; :
 }
 
+prep_tmprom()
+{
+	x_ cp "$elfrom" "$tmprom"
+	unpad_one_byte "$tmprom"
+
+	[ -f "$cbfscfg" ] && \
+		dx_ add_cbfs_option "$cbfscfg"; :
+}
+
 # options for cbfs backend (as opposed to nvram/smmstore):
 
 add_cbfs_option()
@@ -213,6 +234,14 @@ add_cbfs_option()
 	x_ "$cbfstool" "$tmprom" add-int -i "$op_arg" -n "option/$op_name"
 }
 
+add_edk2()
+{
+	edk2dir="elf/coreboot/default/$payload_edk2"
+	edk2="$edk2dir/libgfxinit_corebootfb/UEFIPAYLOAD.fd"
+
+	cbfs "$tmprom" "$edk2" "$1"
+}
+
 # in our design, SeaBIOS is also responsible for starting either
 # a GRUB or U-Boot payload. this is because SeaBIOS is generally
 # a more reliable codebase, so it's less likely to cause a brick
@@ -256,6 +285,9 @@ add_seabios()
 	[ "$payload_grub" = "y" ] && \
 		add_grub
 
+	[ -n "$payload_edk2" ] && \
+		add_edk2 "img/edk2"
+
 	[ "$payload_grubsea" != "y" ] && \
 		cprom # seabios, but don't load grub/u-boot first