[U-Boot] [PATCH v2] powerpc/85xx: select -mcpu=8540 to match -Wa, e500

[Scott Wood]

This allows building with toolchains that by default target e6500.

When targetting e6500, GCC generates a two-operand form of mfcr which gas
normally maps to mfocr.  However, when we tell gas to target e500 rather
than e6500, it rejects two-operand mfcr.  Tell GCC to target a
least-common-denominator e500 to match what we tell the assembler.

-misel and -mno-strict-align are added to keep the code size from growing
(it actually ends up shrinking a bit compared to -mcpu=603e, which was
the default on my old toolchain).

Signed-off-by: Scott Wood <scottwood at freescale.com>
---
v2: add -misel and -mno-strict-align

 arch/powerpc/cpu/mpc85xx/config.mk |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/cpu/mpc85xx/config.mk b/arch/powerpc/cpu/mpc85xx/config.mk
index f36d823..450d511 100644
--- a/arch/powerpc/cpu/mpc85xx/config.mk
+++ b/arch/powerpc/cpu/mpc85xx/config.mk
@@ -23,7 +23,8 @@
 
 PLATFORM_RELFLAGS += -meabi
 
-PLATFORM_CPPFLAGS += -ffixed-r2 -Wa,-me500 -msoft-float -mno-string
+PLATFORM_CPPFLAGS += -ffixed-r2 -mcpu=8540 -misel -mno-strict-align \
+	-Wa,-me500 -msoft-float -mno-string
 
 # -mspe=yes is needed to have -mno-spe accepted by a buggy GCC;
 # see "[PATCH,rs6000] make -mno-spe work as expected" on
-- 
1.7.9.5