LXR linux/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
  27static 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
  34static 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
  43