PPC: Use r2 instead of r29 as global data pointer
R29 was an unlucky choice as with recent toolchains (gcc-4.2.x) gcc
will refuse to use load/store multiple insns; instead, it issues a
list of simple load/store instructions upon function entry and exit,
resulting in bigger code size, which in turn makes the build for a
few boards fail.
Use r2 instead.
Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/cpu/mpc83xx/config.mk b/cpu/mpc83xx/config.mk
index ecf8a60..2f0f1ce 100644
--- a/cpu/mpc83xx/config.mk
+++ b/cpu/mpc83xx/config.mk
@@ -23,7 +23,7 @@
PLATFORM_RELFLAGS += -fPIC -ffixed-r14 -meabi
PLATFORM_CPPFLAGS += -DCONFIG_MPC83XX -DCONFIG_E300 \
- -ffixed-r2 -ffixed-r29 -msoft-float
+ -ffixed-r2 -msoft-float
# Use default linker script. Board port can override in board/*/config.mk
LDSCRIPT := $(SRCTREE)/cpu/mpc83xx/u-boot.lds