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x86: provide CONFIG_BUILD_ROM

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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>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Heinrich Schuchardt
2017-10-16 18:08:38 +00:00
committed by Bin Meng
parent 83262f99cd
commit 871aa41d4c
5 changed files with 19 additions and 4 deletions
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10
doc/README.x86
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@@ -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.
---