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95 lines
1.7 KiB
C
95 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0+-with-RTEMS-exception */
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/*
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* spr.h -- Access to special purpose registers.
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*
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* Copyright (C) 1998 Gabriel Paubert, paubert@iram.es
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*
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* Modified to compile in RTEMS development environment
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* by Eric Valette
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*
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* Copyright (C) 1999 Eric Valette. eric.valette@free.fr
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*
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*/
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#ifndef _LIBCPU_SPR_H
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#define _LIBCPU_SPR_H
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#include <rtems/powerpc/registers.h>
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#define __MFSPR(reg, val) \
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__asm__ __volatile__("mfspr %0,"#reg : "=r" (val))
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#define __MTSPR(val, reg) \
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__asm__ __volatile__("mtspr "#reg",%0" : : "r" (val))
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#define SPR_RW(reg) \
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static inline unsigned long _read_##reg(void) \
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{\
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unsigned long val;\
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__MFSPR(reg, val);\
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return val;\
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}\
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static inline void _write_##reg(unsigned long val)\
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{\
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__MTSPR(val,reg);\
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return;\
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}
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#define SPR_RO(reg) \
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static inline unsigned long _read_##reg(void) \
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{\
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unsigned long val;\
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__MFSPR(reg,val);\
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return val;\
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}
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static inline unsigned long _read_MSR(void)
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{
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unsigned long val;
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__asm__ volatile("mfmsr %0" : "=r" (val));
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return val;
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}
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static inline void _write_MSR(unsigned long val)
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{
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__asm__ volatile("mtmsr %0" : : "r" (val));
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return;
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}
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static inline unsigned long _read_SR(void * va)
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{
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unsigned long val;
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__asm__ volatile (
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".machine \"push\"\n"
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".machine \"any\"\n"
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"mfsrin %0,%1\n"
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".machine \"pop\"" :
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"=r" (val) :
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"r" (va)
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);
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return val;
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}
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static inline void _write_SR(unsigned long val, void * va)
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{
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__asm__ volatile (
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".machine \"push\"\n"
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".machine \"any\"\n"
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"mtsrin %0,%1\n"
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".machine \"pop\"" : :
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"r" (val) , "r" (va) :
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"memory"
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);
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return;
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}
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#endif
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