mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +09:00
476476e73b
It is useful to be able to load U-Boot onto a board even if is it already running EFI. This can allow access to the U-Boot command interface, flexible booting options and easier development. The easiest way to do this is to build U-Boot as a binary blob and have an EFI stub copy it into RAM. Add support for this feature, targeting 32-bit initially. Also add a way to detect when U-Boot has been loaded via a stub. This goes in common.h since it needs to be widely available so that we avoid redoing initialisation that should be skipped. Signed-off-by: Simon Glass <sjg@chromium.org> Improvements to how the payload is built: Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested-by: Bin Meng <bmeng.cn@gmail.com>
17 lines
418 B
Makefile
17 lines
418 B
Makefile
#
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# (C) Copyright 2015 Google, Inc
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#
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# SPDX-License-Identifier: GPL-2.0+
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#
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obj-$(CONFIG_EFI_APP) += efi_app.o efi.o
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CFLAGS_REMOVE_efi_stub.o := -mregparm=3 \
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$(if $(CONFIG_EFI_STUB_64BIT),-march=i386 -m32)
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CFLAGS_efi_stub.o := -fpic -fshort-wchar
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CFLAGS_REMOVE_efi.o := -mregparm=3 \
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$(if $(CONFIG_EFI_STUB_64BIT),-march=i386 -m32)
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CFLAGS_efi.o := -fpic -fshort-wchar
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extra-$(CONFIG_EFI_STUB) += efi_stub.o efi.o
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