LXR linux/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
   8static 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
  23register void *__stack_pointer asm("r1");
  24#define get_sp()        (__stack_pointer)
  25
  26#endif  /* _PPC_BOOT_REG_H */
  27