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 /* 33 * Required for user-space atomic.h includes 34 */ 35 static __inline void 36 powerpc_mb(void) 37 { 38 39 __asm __volatile("eieio; sync" : : : "memory"); 40 } 41 42 #ifdef _KERNEL 43 44 #include <sys/types.h> 45 46 #include <machine/psl.h> 47 #include <machine/spr.h> 48 49 struct thread; 50 51 #ifdef KDB 52 void breakpoint(void); 53 #endif 54 55 /* CPU register mangling inlines */ 56 57 static __inline void 58 mtmsr(register_t value) 59 { 60 61 __asm __volatile ("mtmsr %0; isync" :: "r"(value)); 62 } 63 64 static __inline register_t 65 mfmsr(void) 66 { 67 register_t value; 68 69 __asm __volatile ("mfmsr %0" : "=r"(value)); 70 71 return (value); 72 } 73 74 static __inline void 75 mtsrin(vm_offset_t va, register_t value) 76 { 77 78 __asm __volatile ("mtsrin %0,%1" :: "r"(value), "r"(va)); 79 } 80 81 static __inline register_t 82 mfsrin(vm_offset_t va) 83 { 84 register_t value; 85 86 __asm __volatile ("mfsrin %0,%1" : "=r"(value) : "r"(va)); 87 88 return (value); 89 } 90 91 static __inline void 92 mtdec(register_t value) 93 { 94 95 __asm __volatile ("mtdec %0" :: "r"(value)); 96 } 97 98 static __inline register_t 99 mfdec(void) 100 { 101 register_t value; 102 103 __asm __volatile ("mfdec %0" : "=r"(value)); 104 105 return (value); 106 } 107 108 static __inline register_t 109 mfpvr(void) 110 { 111 register_t value; 112 113 __asm __volatile ("mfpvr %0" : "=r"(value)); 114 115 return (value); 116 } 117 118 static __inline void 119 eieio(void) 120 { 121 122 __asm __volatile ("eieio"); 123 } 124 125 static __inline void 126 isync(void) 127 { 128 129 __asm __volatile ("isync"); 130 } 131 132 static __inline register_t 133 intr_disable(void) 134 { 135 register_t msr; 136 137 msr = mfmsr(); 138 mtmsr(msr & ~PSL_EE); 139 return (msr); 140 } 141 142 static __inline void 143 intr_restore(register_t msr) 144 { 145 146 mtmsr(msr); 147 } 148 149 static __inline void 150 restore_intr(unsigned int msr) 151 { 152 153 mtmsr(msr); 154 } 155 156 static __inline struct pcpu * 157 powerpc_get_pcpup(void) 158 { 159 struct pcpu *ret; 160 161 __asm ("mfsprg %0, 0" : "=r"(ret)); 162 163 return(ret); 164 } 165 166 #endif /* _KERNEL */ 167 168 #endif /* !_MACHINE_CPUFUNC_H_ */ 169