LXR linux/arch/powerpc/boot/reg.h

   1#ifndef _PPC_BOOT_REG_H
   2#define _PPC_BOOT_REG_H
   3/*
   4 * Copyright 2007 Davud Gibson, IBM Corporation.
   5 *
   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.
  10 */
  11
  12static inline u32 mfpvr(void)
  13{
  14        u32 pvr;
  15        asm volatile ("mfpvr    %0" : "=r"(pvr));
  16        return pvr;
  17}
  18
  19#define __stringify_1(x)        #x
  20#define __stringify(x)          __stringify_1(x)
  21
  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))
  26
  27register void *__stack_pointer asm("r1");
  28#define get_sp()        (__stack_pointer)
  29
  30#endif  /* _PPC_BOOT_REG_H */
  31