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authorKumar Gala <galak@kernel.crashing.org>2008-07-01 11:16:40 -0400
committerPaul Mackerras <paulus@samba.org>2008-07-03 02:58:10 -0400
commit2d1b2027626d5151fff8ef7c06ca8e7876a1a510 (patch)
tree6ecc861f4f45a5d26309bf12683aa0372358ef7c /arch/powerpc/lib/feature-fixups-test.S
parent5888da18765ca9af7f10015263d8bc8e3057f128 (diff)
powerpc: Fixup lwsync at runtime
To allow for a single kernel image on e500 v1/v2/mc we need to fixup lwsync at runtime. On e500v1/v2 lwsync causes an illop so we need to patch up the code. We default to 'sync' since that is always safe and if the cpu is capable we will replace 'sync' with 'lwsync'. We introduce CPU_FTR_LWSYNC as a way to determine at runtime if this is needed. This flag could be moved elsewhere since we dont really use it for the normal CPU_FTR purpose. Finally we only store the relative offset in the fixup section to keep it as small as possible rather than using a full fixup_entry. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/lib/feature-fixups-test.S')
-rw-r--r--arch/powerpc/lib/feature-fixups-test.S15
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/powerpc/lib/feature-fixups-test.S b/arch/powerpc/lib/feature-fixups-test.S
index 0549be04399c..cb737484c5aa 100644
--- a/arch/powerpc/lib/feature-fixups-test.S
+++ b/arch/powerpc/lib/feature-fixups-test.S
@@ -10,6 +10,7 @@
10 10
11#include <asm/feature-fixups.h> 11#include <asm/feature-fixups.h>
12#include <asm/ppc_asm.h> 12#include <asm/ppc_asm.h>
13#include <asm/synch.h>
13 14
14 .text 15 .text
15 16
@@ -725,3 +726,17 @@ MAKE_MACRO_TEST_EXPECTED(FTR);
725MAKE_MACRO_TEST(FW_FTR); 726MAKE_MACRO_TEST(FW_FTR);
726MAKE_MACRO_TEST_EXPECTED(FW_FTR); 727MAKE_MACRO_TEST_EXPECTED(FW_FTR);
727#endif 728#endif
729
730globl(lwsync_fixup_test)
7311: or 1,1,1
732 LWSYNC
733globl(end_lwsync_fixup_test)
734
735globl(lwsync_fixup_test_expected_LWSYNC)
7361: or 1,1,1
737 lwsync
738
739globl(lwsync_fixup_test_expected_SYNC)
7401: or 1,1,1
741 sync
742