Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/sparc64/include/asmacros.h
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1 /*- 2 * Copyright (c) 2001 Jake Burkholder. 3 * Copyright (c) 2011 Marius Strobl <marius@FreeBSD.org> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD: releng/10.1/sys/sparc64/include/asmacros.h 226054 2011-10-06 11:01:31Z marius $ 28 */ 29 30 #ifndef _MACHINE_ASMACROS_H_ 31 #define _MACHINE_ASMACROS_H_ 32 33 #ifdef _KERNEL 34 35 /* 36 * Normal and alternate %g6 point to the pcb of the current process. Normal, 37 * alternate and interrupt %g7 point to per-cpu data. 38 */ 39 #define PCB_REG %g6 40 #define PCPU_REG %g7 41 42 /* 43 * Alternate %g5 points to a per-cpu panic stack, which is used as a last 44 * resort, and for temporarily saving alternate globals. 45 */ 46 #define ASP_REG %g5 47 48 #ifdef LOCORE 49 50 /* 51 * Atomically decrement an integer in memory. 52 */ 53 #define ATOMIC_DEC_INT(r1, r2, r3) \ 54 lduw [r1], r2 ; \ 55 9: sub r2, 1, r3 ; \ 56 casa [r1] ASI_N, r2, r3 ; \ 57 cmp r2, r3 ; \ 58 bne,pn %icc, 9b ; \ 59 mov r3, r2 60 61 /* 62 * Atomically increment an integer in memory. 63 */ 64 #define ATOMIC_INC_INT(r1, r2, r3) \ 65 lduw [r1], r2 ; \ 66 9: add r2, 1, r3 ; \ 67 casa [r1] ASI_N, r2, r3 ; \ 68 cmp r2, r3 ; \ 69 bne,pn %icc, 9b ; \ 70 mov r3, r2 71 72 /* 73 * Atomically increment a long in memory. 74 */ 75 #define ATOMIC_INC_LONG(r1, r2, r3) \ 76 ldx [r1], r2 ; \ 77 9: add r2, 1, r3 ; \ 78 casxa [r1] ASI_N, r2, r3 ; \ 79 cmp r2, r3 ; \ 80 bne,pn %xcc, 9b ; \ 81 mov r3, r2 82 83 /* 84 * Atomically clear a number of bits of an integer in memory. 85 */ 86 #define ATOMIC_CLEAR_INT(r1, r2, r3, bits) \ 87 lduw [r1], r2 ; \ 88 9: andn r2, bits, r3 ; \ 89 casa [r1] ASI_N, r2, r3 ; \ 90 cmp r2, r3 ; \ 91 bne,pn %icc, 9b ; \ 92 mov r3, r2 93 94 /* 95 * Atomically clear a number of bits of a long in memory. 96 */ 97 #define ATOMIC_CLEAR_LONG(r1, r2, r3, bits) \ 98 ldx [r1], r2 ; \ 99 9: andn r2, bits, r3 ; \ 100 casxa [r1] ASI_N, r2, r3 ; \ 101 cmp r2, r3 ; \ 102 bne,pn %xcc, 9b ; \ 103 mov r3, r2 104 105 /* 106 * Atomically load an integer from memory. 107 */ 108 #define ATOMIC_LOAD_INT(r1, val) \ 109 clr val ; \ 110 casa [r1] ASI_N, %g0, val 111 112 /* 113 * Atomically load a long from memory. 114 */ 115 #define ATOMIC_LOAD_LONG(r1, val) \ 116 clr val ; \ 117 casxa [r1] ASI_N, %g0, val 118 119 /* 120 * Atomically set a number of bits of an integer in memory. 121 */ 122 #define ATOMIC_SET_INT(r1, r2, r3, bits) \ 123 lduw [r1], r2 ; \ 124 9: or r2, bits, r3 ; \ 125 casa [r1] ASI_N, r2, r3 ; \ 126 cmp r2, r3 ; \ 127 bne,pn %icc, 9b ; \ 128 mov r3, r2 129 130 /* 131 * Atomically set a number of bits of a long in memory. 132 */ 133 #define ATOMIC_SET_LONG(r1, r2, r3, bits) \ 134 ldx [r1], r2 ; \ 135 9: or r2, bits, r3 ; \ 136 casxa [r1] ASI_N, r2, r3 ; \ 137 cmp r2, r3 ; \ 138 bne,pn %xcc, 9b ; \ 139 mov r3, r2 140 141 /* 142 * Atomically store an integer in memory. 143 */ 144 #define ATOMIC_STORE_INT(r1, r2, r3, val) \ 145 lduw [r1], r2 ; \ 146 9: mov val, r3 ; \ 147 casa [r1] ASI_N, r2, r3 ; \ 148 cmp r2, r3 ; \ 149 bne,pn %icc, 9b ; \ 150 mov r3, r2 151 152 /* 153 * Atomically store a long in memory. 154 */ 155 #define ATOMIC_STORE_LONG(r1, r2, r3, val) \ 156 ldx [r1], r2 ; \ 157 9: mov val, r3 ; \ 158 casxa [r1] ASI_N, r2, r3 ; \ 159 cmp r2, r3 ; \ 160 bne,pn %xcc, 9b ; \ 161 mov r3, r2 162 163 #define PCPU(member) PCPU_REG + PC_ ## member 164 #define PCPU_ADDR(member, reg) \ 165 add PCPU_REG, PC_ ## member, reg 166 167 #define DEBUGGER() \ 168 ta %xcc, 1 169 170 #define PANIC(msg, r1) \ 171 .sect .rodata ; \ 172 9: .asciz msg ; \ 173 .previous ; \ 174 SET(9b, r1, %o0) ; \ 175 call panic ; \ 176 nop 177 178 #ifdef INVARIANTS 179 #define KASSERT(r1, msg) \ 180 brnz,pt r1, 8f ; \ 181 nop ; \ 182 PANIC(msg, r1) ; \ 183 8: 184 #else 185 #define KASSERT(r1, msg) 186 #endif 187 188 #define PUTS(msg, r1) \ 189 .sect .rodata ; \ 190 9: .asciz msg ; \ 191 .previous ; \ 192 SET(9b, r1, %o0) ; \ 193 call printf ; \ 194 nop 195 196 #define _ALIGN_DATA .align 8 197 198 #define DATA(name) \ 199 .data ; \ 200 _ALIGN_DATA ; \ 201 .globl name ; \ 202 .type name, @object ; \ 203 name: 204 205 #define EMPTY 206 207 /* 208 * Generate atomic compare and swap, load and store instructions for the 209 * corresponding width and ASI (or not). Note that we want to evaluate the 210 * macro args before concatenating, so that EMPTY really turns into nothing. 211 */ 212 #define _LD(w, a) ld ## w ## a 213 #define _ST(w, a) st ## w ## a 214 #define _CAS(w, a) cas ## w ## a 215 216 #define LD(w, a) _LD(w, a) 217 #define ST(w, a) _ST(w, a) 218 #define CAS(w, a) _CAS(w, a) 219 220 #endif /* LOCORE */ 221 222 #endif /* _KERNEL */ 223 224 #endif /* !_MACHINE_ASMACROS_H_ */
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