Subversion Repositories openrisc_2011-10-31

/*

 *  spr.h -- Access to special purpose registers.

 *

 *  Copyright (C) 1998 Gabriel Paubert, paubert@iram.es

 *

 *  Modified to compile in RTEMS development environment

 *  by Eric Valette

 *

 *  Copyright (C) 1999 Eric Valette. valette@crf.canon.fr

 *

 *  The license and distribution terms for this file may be

 *  found in found in the file LICENSE in this distribution or at

 *  http://www.OARcorp.com/rtems/license.html.

 *

 * $Id: spr.h,v 1.2 2001-09-27 12:01:30 chris Exp $

 *

 */

#ifndef _PPC_SPR_H

#define _PPC_SPR_H

#include <libcpu/cpu.h> 

#define __MFSPR(reg, val) \

        __asm__ __volatile__("mfspr %0,"#reg : "=r" (val))

#define __MTSPR(val, reg) \

        __asm__ __volatile__("mtspr "#reg",%0" : : "r" (val))

#define SPR_RW(reg) \

static inline unsigned long _read_##reg(void) \

{\

        unsigned long val;\

        __MFSPR(reg, val);\

        return val;\

}\

static inline void _write_##reg(unsigned long val)\

{\

        __MTSPR(val,reg);\

        return;\

}

#define SPR_RO(reg) \

static inline unsigned long _read_##reg(void) \

{\

        unsigned long val;\

        __MFSPR(reg,val);\

        return val;\

}

static inline unsigned long _read_MSR(void)

{

        unsigned long val;

        asm volatile("mfmsr %0" : "=r" (val));

        return val;

}

static inline void _write_MSR(unsigned long val)

{

        asm volatile("mtmsr %0" : : "r" (val));

        return;

}

static inline unsigned long _read_SR(void * va)

{

        unsigned long val;

        asm volatile("mfsrin %0,%1" : "=r" (val): "r" (va));

        return val;

}

static inline void _write_SR(unsigned long val, void * va)

{

        asm volatile("mtsrin %0,%1" : : "r"(val), "r" (va): "memory");

        return;

}

#endif