1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 * 22 * Portions Copyright 2012,2013 Justin Hibbits <jhibbits@freebsd.org> 23 * 24 * $FreeBSD$ 25 */ 26/* 27 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 28 * Use is subject to license terms. 29 */ 30 31#include "assym.inc" 32 33#define _ASM 34 35#include <sys/cpuvar_defs.h> 36#include <sys/dtrace.h> 37 38#include <machine/asm.h> 39/* 40#include <machine/cpu.h> 41*/ 42 43/* 44 * Primitives 45 */ 46 47 .text 48 49/* 50void dtrace_membar_producer(void) 51*/ 52ASENTRY_NOPROF(dtrace_membar_producer) 53 sync 54 blr 55END(dtrace_membar_producer) 56 57/* 58void dtrace_membar_consumer(void) 59*/ 60ASENTRY_NOPROF(dtrace_membar_consumer) 61 isync 62 blr 63END(dtrace_membar_consumer) 64 65/* 66dtrace_icookie_t dtrace_interrupt_disable(void) 67*/ 68ASENTRY_NOPROF(dtrace_interrupt_disable) 69 mfmsr %r3 70#ifdef __powerpc64__ 71 /* Two-instruction sequence to clear EE flag */ 72 rldicl %r0,%r3,48,1 73 rotldi %r0,%r0,16 74#else 75 rlwinm %r0,%r3,0,~PSL_EE /* Clear EE flag */ 76#endif 77 mtmsr %r0 78 blr 79END(dtrace_interrupt_disable) 80 81/* 82void dtrace_interrupt_enable(dtrace_icookie_t cookie) 83*/ 84ASENTRY_NOPROF(dtrace_interrupt_enable) 85 mtmsr %r3 86 blr 87END(dtrace_interrupt_enable) 88 89/* 90uint32_t dtrace_cas32(uint32_t *target, uint32_t cmp, uint32_t new) 91*/ 92ASENTRY_NOPROF(dtrace_cas32) 931: 94 lwarx %r0,0,%r3 95 cmpw %r4,%r0 96 bne 2f 97 stwcx. %r5,0,%r3 98 bne 1b 992: mr %r3,%r0 100 blr 101END(dtrace_cas32) 102 103/* 104void * 105dtrace_casptr(void *target, void *cmp, void *new) 106*/ 107ASENTRY_NOPROF(dtrace_casptr) 108#ifdef __powerpc64__ 1091: 110 ldarx %r0,0,%r3 111 cmpd %r4,%r0 112 bne 2f 113 stdcx. %r5,0,%r3 114 bne 1b 115#else 1161: 117 lwarx %r0,0,%r3 118 cmpw %r4,%r0 119 bne 2f 120 stwcx. %r5,0,%r3 121 bne 1b 122#endif 1232: mr %r3,%r0 124 blr 125END(dtrace_casptr) 126 127 128/* 129XXX: unoptimized 130void 131dtrace_copy(uintptr_t src, uintptr_t dest, size_t size) 132*/ 133ASENTRY_NOPROF(dtrace_copy) 134 subi %r7,%r3,1 135 subi %r8,%r4,1 136 mtctr %r5 1371: 138 lbzu %r3,1(%r7) 139 stbu %r3,1(%r8) 140 bdnz 1b 1412: 142 blr 143END(dtrace_copy) 144 145/* 146void 147dtrace_copystr(uintptr_t uaddr, uintptr_t kaddr, size_t size, 148 volatile uint16_t *flags) 149*/ 150ASENTRY_NOPROF(dtrace_copystr) 151 addme %r7,%r3 152 addme %r8,%r4 1531: 154 lbzu %r3,1(%r7) 155 stbu %r3,1(%r8) 156 addme %r5,%r5 157 beq 2f 158 or %r3,%r3,%r3 159 beq 2f 160 andi. %r0,%r5,0x0fff 161 beq 2f 162 lwz %r0,0(%r6) 163 andi. %r0,%r0,CPU_DTRACE_BADADDR 164 beq 1b 1652: 166 blr 167END(dtrace_copystr) 168 169/* 170uintptr_t 171dtrace_caller(int aframes) 172*/ 173ASENTRY_NOPROF(dtrace_caller) 174 li %r3, -1 175 blr 176END(dtrace_caller) 177