1/* $NetBSD: bcopy_page.S,v 1.7 2003/10/13 21:03:13 scw Exp $ */ 2 3/*- 4 * Copyright (c) 1995 Scott Stevens 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Scott Stevens. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 * 32 * RiscBSD kernel project 33 * 34 * bcopy_page.S 35 * 36 * page optimised bcopy and bzero routines 37 * 38 * Created : 08/04/95 39 */ 40 41#include <machine/asm.h> 42 43__FBSDID("$FreeBSD$"); 44 45#include "assym.inc" 46 47 48/* 49 * armv5e version of bcopy_page 50 */ 51ENTRY(bcopy_page) 52 pld [r0] 53 stmfd sp!, {r4, r5} 54 _SAVE({r4, r5}) 55 mov ip, #32 56 ldr r2, [r0], #0x04 /* 0x00 */ 57 ldr r3, [r0], #0x04 /* 0x04 */ 581: pld [r0, #0x18] /* Prefetch 0x20 */ 59 ldr r4, [r0], #0x04 /* 0x08 */ 60 ldr r5, [r0], #0x04 /* 0x0c */ 61 strd r2, [r1], #0x08 62 ldr r2, [r0], #0x04 /* 0x10 */ 63 ldr r3, [r0], #0x04 /* 0x14 */ 64 strd r4, [r1], #0x08 65 ldr r4, [r0], #0x04 /* 0x18 */ 66 ldr r5, [r0], #0x04 /* 0x1c */ 67 strd r2, [r1], #0x08 68 ldr r2, [r0], #0x04 /* 0x20 */ 69 ldr r3, [r0], #0x04 /* 0x24 */ 70 pld [r0, #0x18] /* Prefetch 0x40 */ 71 strd r4, [r1], #0x08 72 ldr r4, [r0], #0x04 /* 0x28 */ 73 ldr r5, [r0], #0x04 /* 0x2c */ 74 strd r2, [r1], #0x08 75 ldr r2, [r0], #0x04 /* 0x30 */ 76 ldr r3, [r0], #0x04 /* 0x34 */ 77 strd r4, [r1], #0x08 78 ldr r4, [r0], #0x04 /* 0x38 */ 79 ldr r5, [r0], #0x04 /* 0x3c */ 80 strd r2, [r1], #0x08 81 ldr r2, [r0], #0x04 /* 0x40 */ 82 ldr r3, [r0], #0x04 /* 0x44 */ 83 pld [r0, #0x18] /* Prefetch 0x60 */ 84 strd r4, [r1], #0x08 85 ldr r4, [r0], #0x04 /* 0x48 */ 86 ldr r5, [r0], #0x04 /* 0x4c */ 87 strd r2, [r1], #0x08 88 ldr r2, [r0], #0x04 /* 0x50 */ 89 ldr r3, [r0], #0x04 /* 0x54 */ 90 strd r4, [r1], #0x08 91 ldr r4, [r0], #0x04 /* 0x58 */ 92 ldr r5, [r0], #0x04 /* 0x5c */ 93 strd r2, [r1], #0x08 94 ldr r2, [r0], #0x04 /* 0x60 */ 95 ldr r3, [r0], #0x04 /* 0x64 */ 96 pld [r0, #0x18] /* Prefetch 0x80 */ 97 strd r4, [r1], #0x08 98 ldr r4, [r0], #0x04 /* 0x68 */ 99 ldr r5, [r0], #0x04 /* 0x6c */ 100 strd r2, [r1], #0x08 101 ldr r2, [r0], #0x04 /* 0x70 */ 102 ldr r3, [r0], #0x04 /* 0x74 */ 103 strd r4, [r1], #0x08 104 ldr r4, [r0], #0x04 /* 0x78 */ 105 ldr r5, [r0], #0x04 /* 0x7c */ 106 strd r2, [r1], #0x08 107 subs ip, ip, #0x01 108 ldrgt r2, [r0], #0x04 /* 0x80 */ 109 ldrgt r3, [r0], #0x04 /* 0x84 */ 110 strd r4, [r1], #0x08 111 bgt 1b 112 ldmfd sp!, {r4, r5} 113 RET 114END(bcopy_page) 115 116/* 117 * armv5e version of bzero_page 118 */ 119ENTRY(bzero_page) 120 mov r1, #PAGE_SIZE 121 mov r2, #0 122 mov r3, #0 1231: strd r2, [r0], #8 /* 32 */ 124 strd r2, [r0], #8 125 strd r2, [r0], #8 126 strd r2, [r0], #8 127 strd r2, [r0], #8 /* 64 */ 128 strd r2, [r0], #8 129 strd r2, [r0], #8 130 strd r2, [r0], #8 131 strd r2, [r0], #8 /* 96 */ 132 strd r2, [r0], #8 133 strd r2, [r0], #8 134 strd r2, [r0], #8 135 strd r2, [r0], #8 /* 128 */ 136 strd r2, [r0], #8 137 strd r2, [r0], #8 138 strd r2, [r0], #8 139 subs r1, r1, #128 140 bne 1b 141 RET 142END(bzero_page) 143