arch/powerpc/boot/reg.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 #ifndef _PPC_BOOT_REG_H
   3 #define _PPC_BOOT_REG_H
   4 /*
   5  * Copyright 2007 Davud Gibson, IBM Corporation.
   6  */
   7
   8 static inline u32 mfpvr(void)
   9 {
  10         u32 pvr;
  11         asm volatile ("mfpvr    %0" : "=r"(pvr));
  12         return pvr;
  13 }
  14
  15 #define __stringify_1(x)        #x
  16 #define __stringify(x)          __stringify_1(x)
  17
  18 #define mfspr(rn)       ({unsigned long rval; \
  19                         asm volatile("mfspr %0," __stringify(rn) \
  20                                 : "=r" (rval)); rval; })
  21 #define mtspr(rn, v)    asm volatile("mtspr " __stringify(rn) ",%0" : : "r" (v))
  22
  23 register void *__stack_pointer asm("r1");
  24 #define get_sp()        (__stack_pointer)
  25
  26 #endif  /* _PPC_BOOT_REG_H */