Most x86 boards build a u-boot.rom which is programmed into SPI flash. But this is not unique to x86. For example some rockchip boards can also boot from SPI flash.
Also, at least on x86, binary blobs are sadly quite common. It is not possible to build a functional image without them, and U-Boot needs to know this at build time.
Introduce a new CONFIG_HAS_ROM option which selects whether u-boot.rom is built and a new CONFIG_ROM_NEEDS_BLOBS option to indicate whether binary blobs are also needed. If they are not needed, it is safe to build the ROM always. Otherwise we still require the BUILD_ROM environment variable.
For now this affects only x86, but future patches will enable this for rockchip too.
Signed-off-by: Simon Glass sjg@chromium.org ---
Kconfig | 18 +++++++++++++++++- Makefile | 17 ++++++++++++----- arch/Kconfig | 1 + arch/x86/Kconfig | 4 ++++ 4 files changed, 34 insertions(+), 6 deletions(-)
diff --git a/Kconfig b/Kconfig index 0e7ccc0b07..876c5db911 100644 --- a/Kconfig +++ b/Kconfig @@ -240,9 +240,25 @@ config PHYS_64BIT This can be used not only for 64bit SoCs, but also for large physical address extension on 32bit SoCs.
+config HAS_ROM + bool + select BINMAN + help + Enables building of a u-boot.rom target. This collects U-Boot and + any necessary binary blobs. + +config ROM_NEEDS_BLOBS + bool + depends on HAS_ROM + help + Enable this if building the u-boot.rom target needs binary blobs, and + so cannot be done normally. In this case, pass BUILD_ROM=1 to make + to tell U-Boot to build the ROM. + config BUILD_ROM bool "Build U-Boot as BIOS replacement" - depends on X86 + depends on HAS_ROM + default y if !ROM_NEEDS_BLOBS help This option allows to build a ROM version of U-Boot. The build process generally requires several binary blobs diff --git a/Makefile b/Makefile index db3b6b9991..d46338a6a4 100644 --- a/Makefile +++ b/Makefile @@ -916,9 +916,12 @@ ALL-$(CONFIG_REMAKE_ELF) += u-boot.elf ALL-$(CONFIG_EFI_APP) += u-boot-app.efi ALL-$(CONFIG_EFI_STUB) += u-boot-payload.efi
+ifneq ($(CONFIG_HAS_ROM),) ifneq ($(BUILD_ROM)$(CONFIG_BUILD_ROM),) -ALL-$(CONFIG_X86_RESET_VECTOR) += u-boot.rom +ALL-y += u-boot.rom endif +endif + ifeq ($(CONFIG_SYS_COREBOOT)$(CONFIG_SPL),yy) ALL-$(CONFIG_BINMAN) += u-boot-x86-with-spl.bin endif @@ -1580,7 +1583,7 @@ endif # reset vector) at the top, Intel ME descriptor at the bottom, and U-Boot in # the middle. This is handled by binman based on an image description in the # board's device tree. -ifneq ($(CONFIG_X86_RESET_VECTOR),) +ifneq ($(CONFIG_HAS_ROM),) rom: u-boot.rom FORCE
refcode.bin: $(srctree)/board/$(BOARDDIR)/refcode.bin FORCE @@ -1590,11 +1593,12 @@ quiet_cmd_ldr = LD $@ cmd_ldr = $(LD) $(LDFLAGS_$(@F)) \ $(filter-out FORCE,$^) -o $@
-u-boot.rom: u-boot-x86-start16.bin u-boot-x86-reset16.bin u-boot.bin \ +rom-deps := u-boot.bin +ifdef CONFIG_X86 +rom-deps += u-boot-x86-start16.bin u-boot-x86-reset16.bin \ $(if $(CONFIG_SPL_X86_16BIT_INIT),spl/u-boot-spl.bin) \ $(if $(CONFIG_TPL_X86_16BIT_INIT),tpl/u-boot-tpl.bin) \ - $(if $(CONFIG_HAVE_REFCODE),refcode.bin) FORCE - $(call if_changed,binman) + $(if $(CONFIG_HAVE_REFCODE),refcode.bin)
OBJCOPYFLAGS_u-boot-x86-start16.bin := -O binary -j .start16 u-boot-x86-start16.bin: u-boot FORCE @@ -1603,6 +1607,9 @@ u-boot-x86-start16.bin: u-boot FORCE OBJCOPYFLAGS_u-boot-x86-reset16.bin := -O binary -j .resetvec u-boot-x86-reset16.bin: u-boot FORCE $(call if_changed,objcopy) + +u-boot.rom: $(rom-deps) FORCE + $(call if_changed,binman) endif
ifneq ($(CONFIG_ARCH_SUNXI),) diff --git a/arch/Kconfig b/arch/Kconfig index a11f872938..bc85e5b50b 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -160,6 +160,7 @@ config X86 select TIMER select USE_PRIVATE_LIBGCC select X86_TSC_TIMER + select HAS_ROM if X86_RESET_VECTOR imply BLK imply CMD_DM imply CMD_FPGA_LOADMK diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index c8eae24c07..c688c46475 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -360,6 +360,8 @@ config HAVE_FSP bool "Add an Firmware Support Package binary" depends on !EFI select USE_HOB + select HAS_ROM + select ROM_NEEDS_BLOBS help Select this option to add an Firmware Support Package binary to the resulting U-Boot image. It is a binary blob which U-Boot uses @@ -519,6 +521,8 @@ config ENABLE_MRC_CACHE
config HAVE_MRC bool "Add a System Agent binary" + select HAS_ROM + select ROM_NEEDS_BLOBS depends on !HAVE_FSP help Select this option to add a System Agent binary to