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 48 struct thread; 49 50 #ifdef KDB 51 void ppc_db_trap(void); 52 #endif 53 54 static __inline void 55 breakpoint(void) 56 { 57 #ifdef KDB 58 ppc_db_trap(); 59 #endif 60 } 61 62 /* CPU register mangling inlines */ 63 64 static __inline void 65 mtmsr(register_t value) 66 { 67 68 __asm __volatile ("mtmsr %0; isync" :: "r"(value)); 69 } 70 71 static __inline register_t 72 mfmsr(void) 73 { 74 register_t value; 75 76 __asm __volatile ("mfmsr %0" : "=r"(value)); 77 78 return (value); 79 } 80 81 static __inline void 82 mtsrin(vm_offset_t va, register_t value) 83 { 84 85 __asm __volatile ("mtsrin %0,%1" :: "r"(value), "r"(va)); 86 } 87 88 static __inline register_t 89 mfsrin(vm_offset_t va) 90 { 91 register_t value; 92 93 __asm __volatile ("mfsrin %0,%1" : "=r"(value) : "r"(va)); 94 95 return (value); 96 } 97 98 static __inline void 99 mtdec(register_t value) 100 { 101 102 __asm __volatile ("mtdec %0" :: "r"(value)); 103 } 104 105 static __inline register_t 106 mfdec(void) 107 { 108 register_t value; 109 110 __asm __volatile ("mfdec %0" : "=r"(value)); 111 112 return (value); 113 } 114 115 static __inline register_t 116 mfpvr(void) 117 { 118 register_t value; 119 120 __asm __volatile ("mfpvr %0" : "=r"(value)); 121 122 return (value); 123 } 124 125 static __inline void 126 eieio(void) 127 { 128 129 __asm __volatile ("eieio"); 130 } 131 132 static __inline void 133 isync(void) 134 { 135 136 __asm __volatile ("isync"); 137 } 138 139 static __inline register_t 140 intr_disable(void) 141 { 142 register_t msr; 143 144 msr = mfmsr(); 145 mtmsr(msr & ~PSL_EE); 146 return (msr); 147 } 148 149 static __inline void 150 intr_restore(register_t msr) 151 { 152 153 mtmsr(msr); 154 } 155 156 static __inline void 157 restore_intr(unsigned int msr) 158 { 159 160 mtmsr(msr); 161 } 162 163 static __inline struct pcpu * 164 powerpc_get_pcpup(void) 165 { 166 struct pcpu *ret; 167 168 __asm ("mfsprg %0, 0" : "=r"(ret)); 169 170 return(ret); 171 } 172 173 #endif /* _KERNEL */ 174 175 #endif /* !_MACHINE_CPUFUNC_H_ */ 176