cpufunc.h revision 93607
1/*- 2 * Copyright (c) 1998 Doug Rabson 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: head/sys/powerpc/include/cpufunc.h 93607 2002-04-01 23:51:23Z dillon $ 27 */ 28 29#ifndef _MACHINE_CPUFUNC_H_ 30#define _MACHINE_CPUFUNC_H_ 31 32#ifdef _KERNEL 33 34#include <sys/types.h> 35 36#include <machine/psl.h> 37 38struct thread; 39 40#ifdef __GNUC__ 41 42static __inline void 43breakpoint(void) 44{ 45 46 return; 47} 48 49#endif 50 51/* CPU register mangling inlines */ 52 53static __inline void 54mtmsr(register_t value) 55{ 56 57 __asm __volatile ("mtmsr %0" :: "r"(value)); 58} 59 60static __inline register_t 61mfmsr(void) 62{ 63 register_t value; 64 65 __asm __volatile ("mfmsr %0" : "=r"(value)); 66 67 return (value); 68} 69 70static __inline void 71mtdec(register_t value) 72{ 73 74 __asm __volatile ("mtdec %0" :: "r"(value)); 75} 76 77static __inline register_t 78mfdec(void) 79{ 80 register_t value; 81 82 __asm __volatile ("mfdec %0" : "=r"(value)); 83 84 return (value); 85} 86 87static __inline void 88isync(void) 89{ 90 91 __asm __volatile ("isync"); 92} 93 94static __inline register_t 95intr_disable(void) 96{ 97 register_t msr; 98 99 msr = mfmsr(); 100 mtmsr(msr & ~(PSL_EE|PSL_RI)); 101 return (msr); 102} 103 104static __inline void 105intr_restore(register_t msr) 106{ 107 108 mtmsr(msr); 109} 110 111static __inline void 112restore_intr(unsigned int msr) 113{ 114 115 mtmsr(msr); 116} 117 118static __inline void 119powerpc_mb(void) 120{ 121 122 __asm __volatile("eieio; sync" : : : "memory"); 123} 124 125static __inline struct pcpu * 126powerpc_get_pcpup(void) 127{ 128 struct pcpu *ret; 129 130 __asm ("mfsprg %0, 0" : "=r"(ret)); 131 132 return(ret); 133} 134 135#endif /* _KERNEL */ 136 137#endif /* !_MACHINE_CPUFUNC_H_ */ 138