e0a8bf6f45
Implement support for launching U-Boot via an EFI stub app on ARM64. This is more or less a straight port of the x86 implementation, but due to the highly x86/qemu specific nature of that implementation I decided to just split it out to its own file. Unlike the x86 implementation, there is no debug UART here since ARM platforms don't have a standard UART interface. However it is usually possible to port over the debug uart implementation for you platform for bringup purposes. Currently this implementation doesn't provide a DTB to U-Boot and expects U-Boot to use a built-in one, however this ought to be a fairly trivial addition in the future. The other significant difference to the x86 version is that rather than copying U-Boot to CONFIG_TEXT_OFFSET, we require that U-Boot is built position independent and copy it to EFI allocated memory. Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
28 lines
749 B
Makefile
28 lines
749 B
Makefile
# SPDX-License-Identifier: GPL-2.0+
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#
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# (C) Copyright 2015 Google, Inc
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obj-$(CONFIG_EFI_APP) += efi_app.o efi.o efi_app_init.o efi_vars.o efi_dtb.o
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obj-$(CONFIG_EFI_STUB) += efi_info.o
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ifeq ($(CONFIG_ARM64),y)
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efi_stub.o := efi_stub_arm64.o
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else
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efi_stub.o := efi_stub_x86.o
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ifeq ($(CONFIG_EFI_STUB_64BIT),y) # && !CONFIG_ARM64
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CFLAGS_REMOVE_$(efi_stub.o) := -march=i386 -m32
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CFLAGS_$(efi_stub.o) := -m64
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CFLAGS_REMOVE_efi.o := -march=i386 -m32
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CFLAGS_efi.o := -fpic -m64
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endif
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endif
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CFLAGS_REMOVE_$(efi_stub.o) += -mregparm=3
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CFLAGS_$(efi_stub.o) += -fpic -fshort-wchar
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CFLAGS_REMOVE_efi.o += -mregparm=3
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CFLAGS_efi.o += -fpic -fshort-wchar
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$(info removing flags $(CFLAGS_REMOVE_$(efi_stub.o)))
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extra-$(CONFIG_EFI_STUB) += $(efi_stub.o) efi.o
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