asmacros.h revision 114071
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 114071 2003-04-26 17:00:10Z obrien $ 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 clear a number of bits of an integer in memory. 73 */ 74#define ATOMIC_CLEAR_INT(r1, r2, r3, bits) \ 75 lduw [r1], r2 ; \ 769: andn r2, bits, r3 ; \ 77 casa [r1] ASI_N, r2, r3 ; \ 78 cmp r2, r3 ; \ 79 bne,pn %icc, 9b ; \ 80 mov r3, r2 81 82#define PCPU(member) PCPU_REG + PC_ ## member 83#define PCPU_ADDR(member, reg) \ 84 add PCPU_REG, PC_ ## member, reg 85 86#define DEBUGGER() \ 87 ta %xcc, 1 88 89#define PANIC(msg, r1) \ 90 .sect .rodata ; \ 919: .asciz msg ; \ 92 .previous ; \ 93 SET(9b, r1, %o0) ; \ 94 call panic ; \ 95 nop 96 97#ifdef INVARIANTS 98#define KASSERT(r1, msg) \ 99 brnz r1, 8f ; \ 100 nop ; \ 101 PANIC(msg, r1) ; \ 1028: 103#else 104#define KASSERT(r1, msg) 105#endif 106 107#define PUTS(msg, r1) \ 108 .sect .rodata ; \ 1099: .asciz msg ; \ 110 .previous ; \ 111 SET(9b, r1, %o0) ; \ 112 call printf ; \ 113 nop 114 115/* 116 * If the kernel can be located above 4G, setx needs to be used to load 117 * symbol values, otherwise set is sufficient. 118 */ 119#ifdef HIGH_KERNEL 120#define SET(sym, tmp, dst) \ 121 setx sym, tmp, dst 122#else 123#define SET(sym, tmp, dst) \ 124 set sym, dst 125#endif 126 127#define _ALIGN_DATA .align 8 128#ifdef GPROF 129#define _ALIGN_TEXT .align 32 130#else 131#define _ALIGN_TEXT .align 16 132#endif 133 134#define DATA(name) \ 135 .data ; \ 136 _ALIGN_DATA ; \ 137 .globl name ; \ 138 .type name, @object ; \ 139name: 140 141#define EMPTY 142 143#define ENTRY(name) \ 144 .text ; \ 145 _ALIGN_TEXT ; \ 146 .globl name ; \ 147 .type name, @function ; \ 148name: 149 150#define END(name) \ 151 .size name, . - name 152 153#endif /* LOCORE */ 154 155#endif /* _KERNEL */ 156 157#endif /* !_MACHINE_ASMACROS_H_ */ 158