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| author | Kumar Gala <galak@kernel.crashing.org> | 2008-07-02 01:16:40 +1000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-07-03 16:58:10 +1000 |
| commit | 2d1b2027626d5151fff8ef7c06ca8e7876a1a510 (patch) | |
| tree | 6ecc861f4f45a5d26309bf12683aa0372358ef7c /arch/powerpc/kernel/vmlinux.lds.S | |
| parent | 5888da18765ca9af7f10015263d8bc8e3057f128 (diff) | |
| download | linux-2d1b2027626d5151fff8ef7c06ca8e7876a1a510.tar.gz linux-2d1b2027626d5151fff8ef7c06ca8e7876a1a510.tar.bz2 linux-2d1b2027626d5151fff8ef7c06ca8e7876a1a510.zip | |
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/vmlinux.lds.S')
| -rw-r--r-- | arch/powerpc/kernel/vmlinux.lds.S | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S index 3c07811989fc..6856f6c15727 100644 --- a/arch/powerpc/kernel/vmlinux.lds.S +++ b/arch/powerpc/kernel/vmlinux.lds.S @@ -127,6 +127,12 @@ SECTIONS *(__ftr_fixup) __stop___ftr_fixup = .; } + . = ALIGN(8); + __lwsync_fixup : AT(ADDR(__lwsync_fixup) - LOAD_OFFSET) { + __start___lwsync_fixup = .; + *(__lwsync_fixup) + __stop___lwsync_fixup = .; + } #ifdef CONFIG_PPC64 . = ALIGN(8); __fw_ftr_fixup : AT(ADDR(__fw_ftr_fixup) - LOAD_OFFSET) { |