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 <s...@chromium.org>
---
(no changes since v1)
Kconfig | 18 +++++++++++++++++-
Makefile | 18 +++++++++++++-----
arch/Kconfig | 1 +
arch/x86/Kconfig | 4 ++++
arch/x86/cpu/baytrail/Kconfig | 1 +
arch/x86/cpu/quark/Kconfig | 1 +
6 files changed, 37 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 149f839948..8a2bb94f2c 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
@@ -1605,6 +1609,10 @@ u-boot-x86-reset16.bin: u-boot FORCE
$(call if_changed,objcopy)
endif
+u-boot.rom: $(rom-deps) FORCE
+ $(call if_changed,binman)
+endif
+
ifneq ($(CONFIG_ARCH_SUNXI),)
ifeq ($(CONFIG_ARM64),)
u-boot-sunxi-with-spl.bin: spl/sunxi-spl.bin u-boot.img u-boot.dtb FORCE
diff --git a/arch/Kconfig b/arch/Kconfig
index a11f872938..ff417d40fd 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -160,6 +160,7 @@ config X86
select TIMER
select USE_PRIVATE_LIBGCC
select X86_TSC_TIMER
+ imply 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
diff --git a/arch/x86/cpu/baytrail/Kconfig b/arch/x86/cpu/baytrail/Kconfig
index d2c3473d6a..53d945e931 100644
--- a/arch/x86/cpu/baytrail/Kconfig
+++ b/arch/x86/cpu/baytrail/Kconfig
@@ -7,6 +7,7 @@ config INTEL_BAYTRAIL
select HAVE_FSP
select ARCH_MISC_INIT
select CPU_INTEL_TURBO_NOT_PACKAGE_SCOPED
+ imply ROM_NEEDS_BLOBS
imply HAVE_INTEL_ME
imply ENABLE_MRC_CACHE
imply AHCI_PCI
diff --git a/arch/x86/cpu/quark/Kconfig b/arch/x86/cpu/quark/Kconfig
index 430cce184d..2fee38aed7 100644
--- a/arch/x86/cpu/quark/Kconfig
+++ b/arch/x86/cpu/quark/Kconfig
@@ -24,6 +24,7 @@ if INTEL_QUARK
config HAVE_RMU
bool "Add a Remote Management Unit (RMU) binary"
+ select ROM_NEEDS_BLOBS
help
Select this option to add a Remote Management Unit (RMU) binary
to the resulting U-Boot image. It is a data block (up to 64K) of
--
2.27.0.290.gba653c62da-goog
