path: root/post/lib_ppc
diff options
authorYuri Tikhonov <>2008-02-21 11:06:07 +0100
committerWolfgang Denk <>2008-02-21 11:25:47 +0100
commit928d1d77f8623c120d8763e20e1ca58df9c5c4c6 (patch)
treebe7cd0f2d81a23a36bab87ca4533c6a3ff076b55 /post/lib_ppc
parentb6f29c84c208a091f95a10cbc9852d729659ba20 (diff)
Fix CPU POST test failure
The CPU POST test code (run from cpu_post_exec_31()) doesn't follow the ABI carefully, at least the CR3, CR4, and CR5 fields of CR are clobbered by it. The gcc-4.2 with its more aggressive optimization exposes this fact. This patch just saves the CR value before running the test code, so allowing it to do anything it wants with CR. Signed-off-by: Dmitry Rakhchev <> Acked-by: Yuri Tikhonov <> --
Diffstat (limited to 'post/lib_ppc')
1 files changed, 3 insertions, 0 deletions
diff --git a/post/lib_ppc/asm.S b/post/lib_ppc/asm.S
index 5e72b3418f..12791762ba 100644
--- a/post/lib_ppc/asm.S
+++ b/post/lib_ppc/asm.S
@@ -308,7 +308,10 @@ cpu_post_exec_31:
lwz r3, 0(r4)
lwz r4, 0(r5)
mr r6, r7
+ mfcr r7
+ mtcr r7
lwz r7, 8(r1)
stw r3, 0(r7)
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