1/* $NetBSD: bcopyinout.S,v 1.11 2003/10/13 21:22:40 scw Exp $ */ 2 3/*- 4 * Copyright (c) 2002 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Allen Briggs for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 39#include "assym.inc" 40 41#include <machine/asm.h> 42#include <sys/errno.h> 43#include <arm/arm/bcopyinout_xscale.S> 44 45/* 46 * int badaddr_read_1(const uint8_t *src, uint8_t *dest) 47 * 48 * Copies a single 8-bit value from src to dest, returning 0 on success, 49 * else EFAULT if a page fault occurred. 50 */ 51ENTRY(badaddr_read_1) 52 GET_PCB(r2) 53 ldr r2, [r2] 54 55 ldr ip, [r2, #PCB_ONFAULT] 56 adr r3, 1f 57 str r3, [r2, #PCB_ONFAULT] 58 nop 59 nop 60 nop 61 ldrb r3, [r0] 62 nop 63 nop 64 nop 65 strb r3, [r1] 66 mov r0, #0 /* No fault */ 671: str ip, [r2, #PCB_ONFAULT] 68 RET 69END(badaddr_read_1) 70 71/* 72 * int badaddr_read_2(const uint16_t *src, uint16_t *dest) 73 * 74 * Copies a single 16-bit value from src to dest, returning 0 on success, 75 * else EFAULT if a page fault occurred. 76 */ 77ENTRY(badaddr_read_2) 78 GET_PCB(r2) 79 ldr r2, [r2] 80 81 ldr ip, [r2, #PCB_ONFAULT] 82 adr r3, 1f 83 str r3, [r2, #PCB_ONFAULT] 84 nop 85 nop 86 nop 87 ldrh r3, [r0] 88 nop 89 nop 90 nop 91 strh r3, [r1] 92 mov r0, #0 /* No fault */ 931: str ip, [r2, #PCB_ONFAULT] 94 RET 95END(badaddr_read_2) 96 97/* 98 * int badaddr_read_4(const uint32_t *src, uint32_t *dest) 99 * 100 * Copies a single 32-bit value from src to dest, returning 0 on success, 101 * else EFAULT if a page fault occurred. 102 */ 103ENTRY(badaddr_read_4) 104 GET_PCB(r2) 105 ldr r2, [r2] 106 107 ldr ip, [r2, #PCB_ONFAULT] 108 adr r3, 1f 109 str r3, [r2, #PCB_ONFAULT] 110 nop 111 nop 112 nop 113 ldr r3, [r0] 114 nop 115 nop 116 nop 117 str r3, [r1] 118 mov r0, #0 /* No fault */ 1191: str ip, [r2, #PCB_ONFAULT] 120 RET 121END(badaddr_read_4) 122 123