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 * $FreeBSD$ 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 38 #ifdef __GNUC__ 39 40 static __inline void 41 breakpoint(void) 42 { 43 return; 44 } 45 46 #endif 47 48 /* CPU register mangling inlines */ 49 50 static __inline void 51 mtmsr(unsigned int value) 52 { 53 __asm __volatile ("mtmsr %0" :: "r"(value)); 54 } 55 56 static __inline unsigned int 57 mfmsr(void) 58 { 59 unsigned int value; 60 61 __asm __volatile ("mfmsr %0" : "=r"(value)); 62 63 return (value); 64 } 65 66 static __inline void 67 mtdec(unsigned int value) 68 { 69 __asm __volatile ("mtdec %0" :: "r"(value)); 70 } 71 72 static __inline unsigned int 73 mfdec(void) 74 { 75 unsigned int value; 76 77 __asm __volatile ("mfdec %0" : "=r"(value)); 78 79 return (value); 80 } 81 82 /* 83 * Bogus interrupt manipulation 84 */ 85 static __inline void 86 disable_intr(void) 87 { 88 unsigned int msr; 89 90 msr = mfmsr(); 91 mtmsr(msr & ~PSL_EE); 92 } 93 94 static __inline void 95 enable_intr(void) 96 { 97 unsigned int msr; 98 99 msr = mfmsr(); 100 mtmsr(msr | PSL_EE); 101 } 102 103 static __inline unsigned int 104 save_intr(void) 105 { 106 unsigned int msr; 107 108 msr = mfmsr(); 109 110 return msr; 111 } 112 113 static __inline critical_t 114 critical_enter(void) 115 { 116 return ((critical_t)save_intr()); 117 } 118 119 static __inline void 120 restore_intr(unsigned int msr) 121 { 122 mtmsr(msr); 123 } 124 125 static __inline void 126 critical_exit(critical_t msr) 127 { 128 return (restore_intr((unsigned int)msr)); 129 } 130 131 static __inline void 132 powerpc_mb(void) 133 { 134 __asm __volatile("eieio; sync" : : : "memory"); 135 } 136 137 static __inline struct globaldata 138 *powerpc_get_globalp(void) 139 { 140 struct globaldata *ret; 141 142 __asm ("mfsprg %0, 0" : "=r"(ret)); 143 144 return(ret); 145 } 146 147 #endif /* _KERNEL */ 148 149 #endif /* !_MACHINE_CPUFUNC_H_ */ 150