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[linux/fpc-iii.git] / arch / powerpc / boot / reg.h
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1 #ifndef _PPC_BOOT_REG_H
2 #define _PPC_BOOT_REG_H
3 /*
4 * Copyright 2007 Davud Gibson, IBM Corporation.
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
12 static inline u32 mfpvr(void)
14 u32 pvr;
15 asm volatile ("mfpvr %0" : "=r"(pvr));
16 return pvr;
19 #define __stringify_1(x) #x
20 #define __stringify(x) __stringify_1(x)
22 #define mfspr(rn) ({unsigned long rval; \
23 asm volatile("mfspr %0," __stringify(rn) \
24 : "=r" (rval)); rval; })
25 #define mtspr(rn, v) asm volatile("mtspr " __stringify(rn) ",%0" : : "r" (v))
27 register void *__stack_pointer asm("r1");
28 #define get_sp() (__stack_pointer)
30 #endif /* _PPC_BOOT_REG_H */