asmacros.h revision 221750
1/*- 2 * Copyright (c) 2001 Jake Burkholder. 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/sparc64/include/asmacros.h 221750 2011-05-10 21:18:45Z marius $ 27 */ 28 29#ifndef _MACHINE_ASMACROS_H_ 30#define _MACHINE_ASMACROS_H_ 31 32#ifdef _KERNEL 33 34/* 35 * Normal and alternate %g6 point to the pcb of the current process. Normal, 36 * alternate and interrupt %g7 point to per-cpu data. 37 */ 38#define PCB_REG %g6 39#define PCPU_REG %g7 40 41/* 42 * Alternate %g5 points to a per-cpu panic stack, which is used as a last 43 * resort, and for temporarily saving alternate globals. 44 */ 45#define ASP_REG %g5 46 47#ifdef LOCORE 48 49/* 50 * Atomically decrement an integer in memory. 51 */ 52#define ATOMIC_DEC_INT(r1, r2, r3) \ 53 lduw [r1], r2 ; \ 549: sub r2, 1, r3 ; \ 55 casa [r1] ASI_N, r2, r3 ; \ 56 cmp r2, r3 ; \ 57 bne,pn %icc, 9b ; \ 58 mov r3, r2 59 60/* 61 * Atomically increment an integer in memory. 62 */ 63#define ATOMIC_INC_INT(r1, r2, r3) \ 64 lduw [r1], r2 ; \ 659: add r2, 1, r3 ; \ 66 casa [r1] ASI_N, r2, r3 ; \ 67 cmp r2, r3 ; \ 68 bne,pn %icc, 9b ; \ 69 mov r3, r2 70 71/* 72 * Atomically increment an u_long in memory. 73 */ 74#define ATOMIC_INC_ULONG(r1, r2, r3) \ 75 ldx [r1], r2 ; \ 769: add r2, 1, r3 ; \ 77 casxa [r1] ASI_N, r2, r3 ; \ 78 cmp r2, r3 ; \ 79 bne,pn %icc, 9b ; \ 80 mov r3, r2 81 82/* 83 * Atomically clear a number of bits of an integer in memory. 84 */ 85#define ATOMIC_CLEAR_INT(r1, r2, r3, bits) \ 86 lduw [r1], r2 ; \ 879: andn r2, bits, r3 ; \ 88 casa [r1] ASI_N, r2, r3 ; \ 89 cmp r2, r3 ; \ 90 bne,pn %icc, 9b ; \ 91 mov r3, r2 92 93/* 94 * Atomically clear a number of bits of an u_long in memory. 95 */ 96#define ATOMIC_CLEAR_LONG(r1, r2, r3, bits) \ 97 ldx [r1], r2 ; \ 989: andn r2, bits, r3 ; \ 99 casxa [r1] ASI_N, r2, r3 ; \ 100 cmp r2, r3 ; \ 101 bne,pn %icc, 9b ; \ 102 mov r3, r2 103 104#define PCPU(member) PCPU_REG + PC_ ## member 105#define PCPU_ADDR(member, reg) \ 106 add PCPU_REG, PC_ ## member, reg 107 108#define DEBUGGER() \ 109 ta %xcc, 1 110 111#define PANIC(msg, r1) \ 112 .sect .rodata ; \ 1139: .asciz msg ; \ 114 .previous ; \ 115 SET(9b, r1, %o0) ; \ 116 call panic ; \ 117 nop 118 119#ifdef INVARIANTS 120#define KASSERT(r1, msg) \ 121 brnz,pt r1, 8f ; \ 122 nop ; \ 123 PANIC(msg, r1) ; \ 1248: 125#else 126#define KASSERT(r1, msg) 127#endif 128 129#define PUTS(msg, r1) \ 130 .sect .rodata ; \ 1319: .asciz msg ; \ 132 .previous ; \ 133 SET(9b, r1, %o0) ; \ 134 call printf ; \ 135 nop 136 137#define _ALIGN_DATA .align 8 138 139#define DATA(name) \ 140 .data ; \ 141 _ALIGN_DATA ; \ 142 .globl name ; \ 143 .type name, @object ; \ 144name: 145 146#define EMPTY 147 148/* 149 * Generate atomic compare and swap, load and store instructions for the 150 * corresponding width and ASI (or not). Note that we want to evaluate the 151 * macro args before concatenating, so that EMPTY really turns into nothing. 152 */ 153#define _LD(w, a) ld ## w ## a 154#define _ST(w, a) st ## w ## a 155#define _CAS(w, a) cas ## w ## a 156 157#define LD(w, a) _LD(w, a) 158#define ST(w, a) _ST(w, a) 159#define CAS(w, a) _CAS(w, a) 160 161#endif /* LOCORE */ 162 163#endif /* _KERNEL */ 164 165#endif /* !_MACHINE_ASMACROS_H_ */ 166