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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/kernel/setup_32.c
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/kernel/setup_32.c')
-rw-r--r--arch/powerpc/kernel/setup_32.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c
index 9e83add54290..0109e7f0ccf9 100644
--- a/arch/powerpc/kernel/setup_32.c
+++ b/arch/powerpc/kernel/setup_32.c
@@ -101,6 +101,10 @@ unsigned long __init early_init(unsigned long dt_ptr)
101 PTRRELOC(&__start___ftr_fixup), 101 PTRRELOC(&__start___ftr_fixup),
102 PTRRELOC(&__stop___ftr_fixup)); 102 PTRRELOC(&__stop___ftr_fixup));
103 103
104 do_lwsync_fixups(spec->cpu_features,
105 PTRRELOC(&__start___lwsync_fixup),
106 PTRRELOC(&__stop___lwsync_fixup));
107
104 return KERNELBASE + offset; 108 return KERNELBASE + offset;
105} 109}
106 110