diff options
| author | Wolfgang Denk <wd@denx.de> | 2008-02-14 22:43:22 +0100 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2008-02-14 22:43:22 +0100 |
| commit | e7670f6c1e52ae6d2a43ff75a8bcfa7a5c86e47b (patch) | |
| tree | c105ae64bb203f93e670ef11b3256a4a3086c0ad /cpu/mpc86xx | |
| parent | 3c234efa693bc59906c2be55c7918ecbb55392ea (diff) | |
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>
Diffstat (limited to 'cpu/mpc86xx')
| -rw-r--r-- | cpu/mpc86xx/config.mk | 2 | ||||
| -rw-r--r-- | cpu/mpc86xx/start.S | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/cpu/mpc86xx/config.mk b/cpu/mpc86xx/config.mk index 3c54f4ad39f..d767269ad3d 100644 --- a/cpu/mpc86xx/config.mk +++ b/cpu/mpc86xx/config.mk @@ -23,4 +23,4 @@ PLATFORM_RELFLAGS += -fPIC -ffixed-r14 -meabi -PLATFORM_CPPFLAGS += -DCONFIG_MPC86xx -ffixed-r2 -ffixed-r29 -mstring +PLATFORM_CPPFLAGS += -DCONFIG_MPC86xx -ffixed-r2 -mstring diff --git a/cpu/mpc86xx/start.S b/cpu/mpc86xx/start.S index fa9736bce0b..09f4ceedb57 100644 --- a/cpu/mpc86xx/start.S +++ b/cpu/mpc86xx/start.S @@ -723,7 +723,7 @@ relocate_code: mr r1, r3 /* Set new stack pointer */ mr r9, r4 /* Save copy of Global Data pointer */ - mr r29, r9 /* Save for DECLARE_GLOBAL_DATA_PTR */ + mr r2, r9 /* Save for DECLARE_GLOBAL_DATA_PTR */ mr r10, r5 /* Save copy of Destination Address */ mr r3, r5 /* Destination Address */ |