powerpc/mpc85xx: Disable AltiVec and VSX instructions

All vector instructions on powerpc mpc85xx must not be used because U-Boot
does not enable them. Usage cause random crashes. SPE vector instructions
are already disabled by compiler flags, so disable also AltiVec and VSX
vector instructions.

Linux kernel disables AltiVec and VSX instructions too.

Signed-off-by: Pali Rohár <pali@kernel.org>

diff --git a/arch/powerpc/cpu/mpc85xx/config.mk b/arch/powerpc/cpu/mpc85xx/config.mk
index 482bb90..71a98f0 100644 (file)
--- a/arch/powerpc/cpu/mpc85xx/config.mk
+++ b/arch/powerpc/cpu/mpc85xx/config.mk
@@ -13,6 +13,10 @@ PLATFORM_RELFLAGS += -msingle-pic-base -fno-jump-tables
 PLATFORM_CPPFLAGS += $(call cc-option,-mno-spe) \
                     $(call cc-option,-mspe=no)
 
+# No AltiVec or VSX instructions when building u-boot
+PLATFORM_CPPFLAGS += $(call cc-option,-mno-altivec)
+PLATFORM_CPPFLAGS += $(call cc-option,-mno-vsx)
+
 ifdef CONFIG_E6500
 PLATFORM_CPPFLAGS += -mcpu=e6500
 else ifdef CONFIG_E5500