Up to now we depended on an exported variable to build u-boot.rom. We should be able to specify it in the configuration file, too.
With this patch this becomes possible using the new Kconfig option CONFIG_BUILD_ROM.
This option depends on CONFIG_X86 and is selected in qemu-x86_defconfig and qemu-x86_64_defconfig.
Cc: Simon Glass sjg@chromium.org Cc: Bin Meng bmeng.cn@gmail.com Signed-off-by: Heinrich Schuchardt xypron.glpk@gmx.de --- v3 Rework the documentation. Simon suggested not to deprecate the export variable. v2 Enable CONFIG_BUILD_ROM for qemu-x86_64_defconfig as suggested by Bin. Fix typos. --- Kconfig | 10 ++++++++++ Makefile | 2 +- configs/qemu-x86_64_defconfig | 1 + configs/qemu-x86_defconfig | 1 + doc/README.x86 | 10 +++++++--- 5 files changed, 20 insertions(+), 4 deletions(-)
diff --git a/Kconfig b/Kconfig index d951e9f804..70508591fd 100644 --- a/Kconfig +++ b/Kconfig @@ -158,6 +158,16 @@ config PHYS_64BIT This can be used not only for 64bit SoCs, but also for large physical address extention on 32bit SoCs.
+config BUILD_ROM + bool "Build U-Boot as BIOS replacement" + depends on X86 + default n + help + This option allows to build a ROM version of U-Boot. + The build process generally requires several binary blobs + which are not shipped in the U-Boot source tree. + Please, see doc/README.x86 for details. + endmenu # General setup
menu "Boot images" diff --git a/Makefile b/Makefile index 888486b296..f26ab77f6a 100644 --- a/Makefile +++ b/Makefile @@ -796,7 +796,7 @@ ALL-$(CONFIG_REMAKE_ELF) += u-boot.elf ALL-$(CONFIG_EFI_APP) += u-boot-app.efi ALL-$(CONFIG_EFI_STUB) += u-boot-payload.efi
-ifneq ($(BUILD_ROM),) +ifneq ($(BUILD_ROM)$(CONFIG_BUILD_ROM),) ALL-$(CONFIG_X86_RESET_VECTOR) += u-boot.rom endif
diff --git a/configs/qemu-x86_64_defconfig b/configs/qemu-x86_64_defconfig index 071dca6eee..c3a97cbdda 100644 --- a/configs/qemu-x86_64_defconfig +++ b/configs/qemu-x86_64_defconfig @@ -1,4 +1,5 @@ CONFIG_X86=y +CONFIG_BUILD_ROM=y CONFIG_SPL_LIBCOMMON_SUPPORT=y CONFIG_SPL_LIBGENERIC_SUPPORT=y CONFIG_SYS_MALLOC_F_LEN=0x1000 diff --git a/configs/qemu-x86_defconfig b/configs/qemu-x86_defconfig index cdbc5c4a6e..e4a3e31ad5 100644 --- a/configs/qemu-x86_defconfig +++ b/configs/qemu-x86_defconfig @@ -1,4 +1,5 @@ CONFIG_X86=y +CONFIG_BUILD_ROM=y CONFIG_MAX_CPUS=2 CONFIG_DEFAULT_DEVICE_TREE="qemu-x86_i440fx" CONFIG_SMP=y diff --git a/doc/README.x86 b/doc/README.x86 index c96a22cb08..1e3af5af90 100644 --- a/doc/README.x86 +++ b/doc/README.x86 @@ -80,11 +80,15 @@ Building a ROM version of U-Boot (hereafter referred to as u-boot.rom) is a little bit tricky, as generally it requires several binary blobs which are not shipped in the U-Boot source tree. Due to this reason, the u-boot.rom build is not turned on by default in the U-Boot source tree. Firstly, you need turn it -on by enabling the ROM build: +on by enabling the ROM build either via an environment variable
-$ export BUILD_ROM=y + $ export BUILD_ROM=y
-This tells the Makefile to build u-boot.rom as a target. +or via configuration + + CONFIG_BUILD_ROM=y + +Both tell the Makefile to build u-boot.rom as a target.
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