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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-09-23 06:04:45 +0400 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-10-11 09:48:34 +0400 |
| commit | 5c0484e25ec03243d4c2f2d4416d4a13efc77f6a (patch) | |
| tree | fe31fb5e5be50119f39d2e22953f13d8ace85cb1 /arch/powerpc/kernel/head_64.S | |
| parent | c57a5ce0df04be61bafedc0f3043d568103c7ab5 (diff) | |
| download | linux-5c0484e25ec03243d4c2f2d4416d4a13efc77f6a.tar.xz | |
powerpc: Endian safe trampoline
Create a trampoline that works in either endian and flips to
the expected endian. Use it for primary and secondary thread
entry as well as RTAS and OF call return.
Credit for finding the magic instruction goes to Paul Mackerras
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel/head_64.S')
| -rw-r--r-- | arch/powerpc/kernel/head_64.S | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S index 3d11d8038dee..2ae41aba4053 100644 --- a/arch/powerpc/kernel/head_64.S +++ b/arch/powerpc/kernel/head_64.S @@ -68,6 +68,7 @@ _stext: _GLOBAL(__start) /* NOP this out unconditionally */ BEGIN_FTR_SECTION + FIXUP_ENDIAN b .__start_initialization_multiplatform END_FTR_SECTION(0, 1) @@ -115,6 +116,7 @@ __run_at_load: */ .globl __secondary_hold __secondary_hold: + FIXUP_ENDIAN #ifndef CONFIG_PPC_BOOK3E mfmsr r24 ori r24,r24,MSR_RI @@ -205,6 +207,7 @@ _GLOBAL(generic_secondary_thread_init) * as SCOM before entry). */ _GLOBAL(generic_secondary_smp_init) + FIXUP_ENDIAN mr r24,r3 mr r25,r4 |