arm64: big-endian: add big-endian support to top-level arch Makefile
This patch adds big-endian support to the AArch64 top-level Makefile.
This currently just passes the relevant flags to the toolchain and is
predicated on a Kconfig option that will be introduced later on.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index d90cf79..2fceb71 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -20,9 +20,15 @@
KBUILD_DEFCONFIG := defconfig
KBUILD_CFLAGS += -mgeneral-regs-only
+ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
+KBUILD_CPPFLAGS += -mbig-endian
+AS += -EB
+LD += -EB
+else
KBUILD_CPPFLAGS += -mlittle-endian
AS += -EL
LD += -EL
+endif
comma = ,