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riscv: add build support for big-endian

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Add support to build code big-endian if the board supports
it. Updates the makefile to pass the correct compiler and
elf flags.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Reviewed-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Ben Dooks 2025-06-13 17:12:57 +01:00 committed by Leo Yu-Chi Liang
parent a23c1b3fc0
commit 7bd65e89ad
1 changed files with 14 additions and 4 deletions
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18
arch/riscv/config.mk
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@ -10,19 +10,29 @@
# Rick Chen, Andes Technology Corporation <rick@andestech.com>
#
32bit-emul := elf32lriscv
64bit-emul := elf64lriscv
ifdef CONFIG_SYS_BIG_ENDIAN
small-endian := b
large-endian := big
PLATFORM_CPPFLAGS += -mbig-endian
KBUILD_LDFLAGS += -mbig-endian
else
small-endian := l
large-endian := little
endif
32bit-emul := elf32$(small-endian)riscv
64bit-emul := elf64$(small-endian)riscv
ifdef CONFIG_32BIT
KBUILD_LDFLAGS += -m $(32bit-emul)
EFI_LDS := elf_riscv32_efi.lds
PLATFORM_ELFFLAGS += -B riscv -O elf32-littleriscv
PLATFORM_ELFFLAGS += -B riscv -O elf32-$(large-endian)riscv
endif
ifdef CONFIG_64BIT
KBUILD_LDFLAGS += -m $(64bit-emul)
EFI_LDS := elf_riscv64_efi.lds
PLATFORM_ELFFLAGS += -B riscv -O elf64-littleriscv
PLATFORM_ELFFLAGS += -B riscv -O elf64-$(large-endian)riscv
endif
PLATFORM_CPPFLAGS += -ffixed-x3 -fpic