The 4xx bootwrapper occasionally needs to access SPR registers,
this adds mfspr/mtspr wrappers to it.
Signed-off-by: Benjamin Herrenschmidt <[EMAIL PROTECTED]>
---
===================================================================
arch/powerpc/boot/reg.h | 8 ++++++++
1 file changed, 8 insertions(+)
Index: linux-work/arch/powerpc/boot/reg.h
===================================================================
--- linux-work.orig/arch/powerpc/boot/reg.h 2007-12-03 11:48:00.000000000
+1100
+++ linux-work/arch/powerpc/boot/reg.h 2007-12-03 13:44:06.000000000 +1100
@@ -16,6 +16,14 @@ static inline u32 mfpvr(void)
return pvr;
}
+#define __stringify_1(x) #x
+#define __stringify(x) __stringify_1(x)
+
+#define mfspr(rn) ({unsigned long rval; \
+ asm volatile("mfspr %0," __stringify(rn) \
+ : "=r" (rval)); rval; })
+#define mtspr(rn, v) asm volatile("mtspr " __stringify(rn) ",%0" : : "r" (v))
+
register void *__stack_pointer asm("r1");
#define get_sp() (__stack_pointer)
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