bcopy_page.S revision 1.1.4.2
1 1.1.4.2 bouyer /* $NetBSD: bcopy_page.S,v 1.1.4.2 2001/03/12 13:27:19 bouyer Exp $ */ 2 1.1.4.2 bouyer 3 1.1.4.2 bouyer /* 4 1.1.4.2 bouyer * Copyright (c) 1995 Scott Stevens 5 1.1.4.2 bouyer * All rights reserved. 6 1.1.4.2 bouyer * 7 1.1.4.2 bouyer * Redistribution and use in source and binary forms, with or without 8 1.1.4.2 bouyer * modification, are permitted provided that the following conditions 9 1.1.4.2 bouyer * are met: 10 1.1.4.2 bouyer * 1. Redistributions of source code must retain the above copyright 11 1.1.4.2 bouyer * notice, this list of conditions and the following disclaimer. 12 1.1.4.2 bouyer * 2. Redistributions in binary form must reproduce the above copyright 13 1.1.4.2 bouyer * notice, this list of conditions and the following disclaimer in the 14 1.1.4.2 bouyer * documentation and/or other materials provided with the distribution. 15 1.1.4.2 bouyer * 3. All advertising materials mentioning features or use of this software 16 1.1.4.2 bouyer * must display the following acknowledgement: 17 1.1.4.2 bouyer * This product includes software developed by Scott Stevens. 18 1.1.4.2 bouyer * 4. The name of the author may not be used to endorse or promote products 19 1.1.4.2 bouyer * derived from this software without specific prior written permission. 20 1.1.4.2 bouyer * 21 1.1.4.2 bouyer * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 1.1.4.2 bouyer * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 1.1.4.2 bouyer * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 1.1.4.2 bouyer * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 1.1.4.2 bouyer * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 1.1.4.2 bouyer * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 1.1.4.2 bouyer * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 1.1.4.2 bouyer * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 1.1.4.2 bouyer * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 1.1.4.2 bouyer * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 1.1.4.2 bouyer * 32 1.1.4.2 bouyer * RiscBSD kernel project 33 1.1.4.2 bouyer * 34 1.1.4.2 bouyer * bcopy_page.S 35 1.1.4.2 bouyer * 36 1.1.4.2 bouyer * page optimised bcopy and bzero routines 37 1.1.4.2 bouyer * 38 1.1.4.2 bouyer * Created : 08/04/95 39 1.1.4.2 bouyer */ 40 1.1.4.2 bouyer 41 1.1.4.2 bouyer #include <machine/param.h> 42 1.1.4.2 bouyer #include <machine/asm.h> 43 1.1.4.2 bouyer 44 1.1.4.2 bouyer /* 45 1.1.4.2 bouyer * bcopy_page(src, dest) 46 1.1.4.2 bouyer * 47 1.1.4.2 bouyer * Optimised copy page routine. 48 1.1.4.2 bouyer * 49 1.1.4.2 bouyer * On entry: 50 1.1.4.2 bouyer * r0 - src address 51 1.1.4.2 bouyer * r1 - dest address 52 1.1.4.2 bouyer * 53 1.1.4.2 bouyer * Requires: 54 1.1.4.2 bouyer * number of bytes per page (NBPG) is a multiple of 512 55 1.1.4.2 bouyer */ 56 1.1.4.2 bouyer 57 1.1.4.2 bouyer ENTRY(bcopy_page) 58 1.1.4.2 bouyer stmfd sp!, {r4-r10, lr} 59 1.1.4.2 bouyer mov r2, #(NBPG >> 9) 60 1.1.4.2 bouyer 61 1.1.4.2 bouyer Lloopcopy: 62 1.1.4.2 bouyer ldmia r0!, {r3-r10} 63 1.1.4.2 bouyer stmia r1!, {r3-r10} 64 1.1.4.2 bouyer ldmia r0!, {r3-r10} 65 1.1.4.2 bouyer stmia r1!, {r3-r10} 66 1.1.4.2 bouyer ldmia r0!, {r3-r10} 67 1.1.4.2 bouyer stmia r1!, {r3-r10} 68 1.1.4.2 bouyer ldmia r0!, {r3-r10} 69 1.1.4.2 bouyer stmia r1!, {r3-r10} 70 1.1.4.2 bouyer 71 1.1.4.2 bouyer ldmia r0!, {r3-r10} 72 1.1.4.2 bouyer stmia r1!, {r3-r10} 73 1.1.4.2 bouyer ldmia r0!, {r3-r10} 74 1.1.4.2 bouyer stmia r1!, {r3-r10} 75 1.1.4.2 bouyer ldmia r0!, {r3-r10} 76 1.1.4.2 bouyer stmia r1!, {r3-r10} 77 1.1.4.2 bouyer ldmia r0!, {r3-r10} 78 1.1.4.2 bouyer stmia r1!, {r3-r10} 79 1.1.4.2 bouyer 80 1.1.4.2 bouyer ldmia r0!, {r3-r10} 81 1.1.4.2 bouyer stmia r1!, {r3-r10} 82 1.1.4.2 bouyer ldmia r0!, {r3-r10} 83 1.1.4.2 bouyer stmia r1!, {r3-r10} 84 1.1.4.2 bouyer ldmia r0!, {r3-r10} 85 1.1.4.2 bouyer stmia r1!, {r3-r10} 86 1.1.4.2 bouyer ldmia r0!, {r3-r10} 87 1.1.4.2 bouyer stmia r1!, {r3-r10} 88 1.1.4.2 bouyer 89 1.1.4.2 bouyer ldmia r0!, {r3-r10} 90 1.1.4.2 bouyer stmia r1!, {r3-r10} 91 1.1.4.2 bouyer ldmia r0!, {r3-r10} 92 1.1.4.2 bouyer stmia r1!, {r3-r10} 93 1.1.4.2 bouyer ldmia r0!, {r3-r10} 94 1.1.4.2 bouyer stmia r1!, {r3-r10} 95 1.1.4.2 bouyer ldmia r0!, {r3-r10} 96 1.1.4.2 bouyer stmia r1!, {r3-r10} 97 1.1.4.2 bouyer 98 1.1.4.2 bouyer subs r2, r2, #1 99 1.1.4.2 bouyer bne Lloopcopy 100 1.1.4.2 bouyer 101 1.1.4.2 bouyer ldmfd sp!, {r4-r10, pc} 102 1.1.4.2 bouyer 103 1.1.4.2 bouyer /* 104 1.1.4.2 bouyer * bzero_page(dest) 105 1.1.4.2 bouyer * 106 1.1.4.2 bouyer * Optimised zero page routine. 107 1.1.4.2 bouyer * 108 1.1.4.2 bouyer * On entry: 109 1.1.4.2 bouyer * r0 - dest address 110 1.1.4.2 bouyer * 111 1.1.4.2 bouyer * Requires: 112 1.1.4.2 bouyer * number of bytes per page (NBPG) is a multiple of 512 113 1.1.4.2 bouyer */ 114 1.1.4.2 bouyer 115 1.1.4.2 bouyer ENTRY(bzero_page) 116 1.1.4.2 bouyer stmfd sp!, {r4-r10, lr} 117 1.1.4.2 bouyer mov r2, #(NBPG >> 9) 118 1.1.4.2 bouyer 119 1.1.4.2 bouyer mov r3, #0 120 1.1.4.2 bouyer mov r4, #0 121 1.1.4.2 bouyer mov r5, #0 122 1.1.4.2 bouyer mov r6, #0 123 1.1.4.2 bouyer mov r7, #0 124 1.1.4.2 bouyer mov r8, #0 125 1.1.4.2 bouyer mov r9, #0 126 1.1.4.2 bouyer mov r10, #0 127 1.1.4.2 bouyer 128 1.1.4.2 bouyer Lloopzero: 129 1.1.4.2 bouyer stmia r0!, {r3-r10} 130 1.1.4.2 bouyer stmia r0!, {r3-r10} 131 1.1.4.2 bouyer stmia r0!, {r3-r10} 132 1.1.4.2 bouyer stmia r0!, {r3-r10} 133 1.1.4.2 bouyer 134 1.1.4.2 bouyer stmia r0!, {r3-r10} 135 1.1.4.2 bouyer stmia r0!, {r3-r10} 136 1.1.4.2 bouyer stmia r0!, {r3-r10} 137 1.1.4.2 bouyer stmia r0!, {r3-r10} 138 1.1.4.2 bouyer 139 1.1.4.2 bouyer stmia r0!, {r3-r10} 140 1.1.4.2 bouyer stmia r0!, {r3-r10} 141 1.1.4.2 bouyer stmia r0!, {r3-r10} 142 1.1.4.2 bouyer stmia r0!, {r3-r10} 143 1.1.4.2 bouyer 144 1.1.4.2 bouyer stmia r0!, {r3-r10} 145 1.1.4.2 bouyer stmia r0!, {r3-r10} 146 1.1.4.2 bouyer stmia r0!, {r3-r10} 147 1.1.4.2 bouyer stmia r0!, {r3-r10} 148 1.1.4.2 bouyer 149 1.1.4.2 bouyer subs r2, r2, #1 150 1.1.4.2 bouyer bne Lloopzero 151 1.1.4.2 bouyer 152 1.1.4.2 bouyer ldmfd sp!, {r4-r10, pc} 153
Indexes created Wed Oct 22 13:09:56 GMT 2025