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 d90cf79f233a952cf8a164ce78deffea7b65cace..2fceb71ac3b7a826f03e4870ac49d5e1e99cd2c3 100644 (file)
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -20,9 +20,15 @@ LIBGCC               := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
 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 = ,