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| author | Simon Glass <sjg@chromium.org> | 2015-08-04 12:33:52 -0600 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2015-08-05 08:44:06 -0600 |
| commit | 476476e73b14696563524cbc2627a4c033ea64da (patch) | |
| tree | ddd2da016f47be232d02b4fb3be7b4264e7b1043 /lib/efi/Makefile | |
| parent | 465a67cf529bd2f7a5ca871aff3fa63faa142516 (diff) | |
| download | talos-obmc-uboot-476476e73b14696563524cbc2627a4c033ea64da.tar.gz talos-obmc-uboot-476476e73b14696563524cbc2627a4c033ea64da.zip | |
efi: Add support for loading U-Boot through an EFI stub
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>
Diffstat (limited to 'lib/efi/Makefile')
| -rw-r--r-- | lib/efi/Makefile | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/efi/Makefile b/lib/efi/Makefile index 5ee344c7d6..4bc67f01f9 100644 --- a/lib/efi/Makefile +++ b/lib/efi/Makefile @@ -5,3 +5,12 @@ # obj-$(CONFIG_EFI_APP) += efi_app.o efi.o + +CFLAGS_REMOVE_efi_stub.o := -mregparm=3 \ + $(if $(CONFIG_EFI_STUB_64BIT),-march=i386 -m32) +CFLAGS_efi_stub.o := -fpic -fshort-wchar +CFLAGS_REMOVE_efi.o := -mregparm=3 \ + $(if $(CONFIG_EFI_STUB_64BIT),-march=i386 -m32) +CFLAGS_efi.o := -fpic -fshort-wchar + +extra-$(CONFIG_EFI_STUB) += efi_stub.o efi.o |
