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powerpc/powernv: Fix OPAL entry and exit in little endian mode 

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt 2013-09-23 12:05:03 +10:00
parent 4f89363b11
commit be401b372f
1 changed files with 8 additions and 1 deletions
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9
arch/powerpc/platforms/powernv/opal-wrappers.S
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@ -34,7 +34,7 @@
mtmsrd r12,1; \ mtmsrd r12,1; \
LOAD_REG_ADDR(r0,.opal_return); \ LOAD_REG_ADDR(r0,.opal_return); \
mtlr r0; \ mtlr r0; \
li r0,MSR_DR|MSR_IR; \ li r0,MSR_DR|MSR_IR|MSR_LE;\
andc r12,r12,r0; \ andc r12,r12,r0; \
li r0,token; \ li r0,token; \
mtspr SPRN_HSRR1,r12; \ mtspr SPRN_HSRR1,r12; \
@ -45,6 +45,13 @@
hrfid hrfid
_STATIC(opal_return) _STATIC(opal_return)
/*
* Fixup endian on OPAL return... we should be able to simplify
* this by instead converting the below trampoline to a set of
* bytes (always BE) since MSR:LE will end up fixed up as a side
* effect of the rfid.
*/
FIXUP_ENDIAN
ld r2,PACATOC(r13); ld r2,PACATOC(r13);
ld r4,8(r1); ld r4,8(r1);
ld r5,16(r1); ld r5,16(r1);