powerpc/book3e-64: Add helper function to setup IVORs

Not all 64-bit Book-3E parts will have fixed IVORs so add a function that
cpusetup code can call to setup the base IVORs (0..15) to match the fixed
offsets.  We need to 'or' part of interrupt_base_book3e into the IVORs
since on parts that have them the IVPR doesn't extend as far down.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/exception-64e.h b/arch/powerpc/include/asm/exception-64e.h
index 94cb3d79d125..6d53f311d942 100644
--- a/arch/powerpc/include/asm/exception-64e.h
+++ b/arch/powerpc/include/asm/exception-64e.h
@@ -196,6 +196,10 @@ exc_##label##_book3e:
 #define TLB_MISS_STATS_SAVE_INFO
 #endif
 
+#define SET_IVOR(vector_number, vector_offset)  \
+        li      r3,vector_offset@l;             \
+        ori     r3,r3,interrupt_base_book3e@l;  \
+        mtspr   SPRN_IVOR##vector_number,r3;
 
 #endif /* _ASM_POWERPC_EXCEPTION_64E_H */