arch/openrisc/include/asm/spr.h

   1 /*
   2  * OpenRISC Linux
   3  *
   4  * Linux architectural port borrowing liberally from similar works of
   5  * others.  All original copyrights apply as per the original source
   6  * declaration.
   7  *
   8  * OpenRISC implementation:
   9  * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  */
  16
  17 #ifndef __ASM_OPENRISC_SPR_H
  18 #define __ASM_OPENRISC_SPR_H
  19
  20 #define mtspr(_spr, _val) __asm__ __volatile__ (                \
  21         "l.mtspr r0,%1,%0"                                      \
  22         : : "K" (_spr), "r" (_val))
  23 #define mtspr_off(_spr, _off, _val) __asm__ __volatile__ (      \
  24         "l.mtspr %0,%1,%2"                                      \
  25         : : "r" (_off), "r" (_val), "K" (_spr))
  26
  27 static inline unsigned long mfspr(unsigned long add)
  28 {
  29         unsigned long ret;
  30         __asm__ __volatile__ ("l.mfspr %0,r0,%1" : "=r" (ret) : "K" (add));
  31         return ret;
  32 }
  33
  34 static inline unsigned long mfspr_off(unsigned long add, unsigned long offset)
  35 {
  36         unsigned long ret;
  37         __asm__ __volatile__ ("l.mfspr %0,%1,%2" : "=r" (ret)
  38                                                  : "r" (offset), "K" (add));
  39         return ret;
  40 }
  41
  42 #endif