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microblaze: fix endian handling 

Building an allmodconfig kernel fails horribly because of
endian mismatch. It turns out that the -mlittle-endian
switch was not honored at all as we were using the wrong
Kconfig symbol and failing to apply CPUFLAGS to the CFLAGS.
Finally, the linker flags did not get set right.

This addresses all three of those issues, which now lets
me build both big-endian and little-endian kernels for
testing.

Fixes: 428dbf156c ("arch: change default endian for microblaze")
Fixes: 206d3642d8 ("arch/microblaze: add choice for endianness and update Makefile")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Arnd Bergmann 2018-01-02 12:47:19 +01:00 committed by Michal Simek
parent a8750ddca9
commit 71e7673dad
1 changed files with 11 additions and 6 deletions
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17
arch/microblaze/Makefile
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@ -36,16 +36,21 @@ endif
CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_DIV) += -mno-xl-soft-div
CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_BARREL) += -mxl-barrel-shift
CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_PCMP_INSTR) += -mxl-pattern-compare
CPUFLAGS-$(CONFIG_BIG_ENDIAN) += -mbig-endian
CPUFLAGS-$(CONFIG_LITTLE_ENDIAN) += -mlittle-endian
ifdef CONFIG_CPU_BIG_ENDIAN
KBUILD_CFLAGS += -mbig-endian
KBUILD_AFLAGS += -mbig-endian
LD += -EB
else
KBUILD_CFLAGS += -mlittle-endian
KBUILD_AFLAGS += -mlittle-endian
LD += -EL
endif
CPUFLAGS-1 += $(call cc-option,-mcpu=v$(CPU_VER))
# r31 holds current when in kernel mode
KBUILD_CFLAGS += -ffixed-r31 $(CPUFLAGS-1) $(CPUFLAGS-2)
LDFLAGS :=
LDFLAGS_vmlinux :=
KBUILD_CFLAGS += -ffixed-r31 $(CPUFLAGS-y) $(CPUFLAGS-1) $(CPUFLAGS-2)
head-y := arch/microblaze/kernel/head.o
libs-y += arch/microblaze/lib/