4xx_locore.S revision 1.1.2.4
1 /* $NetBSD: 4xx_locore.S,v 1.1.2.4 2002/12/19 20:00:20 thorpej Exp $ */ 2 3 /* 4 * Copyright 2001 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Eduardo Horvath and Simon Burge 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 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 40 * Copyright (C) 1995, 1996 TooLs GmbH. 41 * All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by TooLs GmbH. 54 * 4. The name of TooLs GmbH may not be used to endorse or promote products 55 * derived from this software without specific prior written permission. 56 * 57 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 58 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 59 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 60 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 61 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 62 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 63 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 64 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 65 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 66 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 67 */ 68 69 /* 70 * This is not a standalone file. To use it, #inlcude it at 71 * the end of your port's locore.S 72 */ 73 74 /* 75 * Pull in common PowerPC locore subroutines. 76 */ 77 #include <powerpc/powerpc/locore_subr.S> 78 79 /* 80 * Pull in common trap vector code. 81 */ 82 #include <powerpc/ibm4xx/trap_subr.S> 83 #include <powerpc/ibm4xx/4xx_trap_subr.S> 84 85 .globl _C_LABEL(ppc4xx_reset) 86 _C_LABEL(ppc4xx_reset): 87 mfspr 3,SPR_DBCR0 88 oris 3,r13,DBCR0_RST_SYSTEM@h 89 mtspr SPR_DBCR0,3 90 ba 0 91 92 #if 0 93 /* 94 * XXXX the following doesn't quite work right yet. 95 */ 96 /* 97 * void bcopy(const void *src, void *dst, size_t len); 98 * 99 * swap r3 and r4 and fall through to memcopy. 100 */ 101 .globl _C_LABEL(bcopy) 102 _C_LABEL(bcopy): 103 mr r0,r3 104 mr r3,r4 105 mr r4,r0 106 /* FALLTHROUGH */ 107 108 /* 109 * void * memcpy(void *dst (r3), const void *src (r4), size_t len (r5)); 110 * 111 * Copy memory (obviously) 112 * 113 * We will try to do data cache block aligned stores so we 114 * can use block allocate and not have to read from the 115 * destination. 116 * 117 * Register use: 118 * 119 * r1 stack (of course) 120 * r3 dst 121 * r4 src 122 * r5 len 123 * r6 tmp 124 * r7 holds 32 125 * r8 holds dst 126 * r24-r31 block move regs 127 * 128 */ 129 130 ENTRY(memcpy) 131 stwu r1,-(10*4)(r1) /* Allocate some RAM to save 8 regs to. */ 132 cmpwi r5, 32 /* Less than 32 bytes ? */ 133 stmw r24,8(r1) /* Save ALL regs (could be optimized) */ 134 135 mr r8,r3 /* save dst */ 136 li r7,32 137 138 dcbt 0,r4 /* Start bringing in cache line. */ 139 blt 1f /* Finish up */ 140 141 neg r6,r3 /* Find how far unaligned we are... */ 142 andi. r6,r6,31 /* Cache-align dest. */ 143 mtxer r6 144 sub r5,r5,r6 /* subtract count */ 145 lswx r24,0,r4 /* Load some. */ 146 add r4,r4,r6 147 dcbt 0,r4 /* Fetch next line */ 148 stswx r24,0,r3 /* Store some */ 149 add r3,r3,r6 150 addic. r6,r5,-32 /* Pre-decrement next line */ 151 ble 1f /* Less than 32-bytes? finishup */ 152 153 /* Dest should not be cache line aligned. */ 154 /* XXX need gas 2.11 to grok dcba insn */ 155 #ifdef GAS_2_11 156 dcba 0,r3 /* Allocate a line */ 157 #else 158 .long 0x7c001dec /* dcba 0,r3 */ 159 #endif 160 0: 161 dcbt r7,r4 /* Bring in the next line, too */ 162 163 lswi r24,r4,32 164 addi r4,r4,32 /* Inc src */ 165 mr r5,r6 166 167 addic. r6,r5,-32 168 stswi r24,r3,32 169 addi r3,r3,32 /* Inc dst */ 170 #ifdef GAS_2_11 171 dcba 0,r3 /* Allocate another line */ 172 #else 173 .long 0x7c071dec /* dcba r7,r3 */ 174 #endif 175 bgt 0b 176 1: 177 mtxer r5 /* Store byte count */ 178 lswx r24,0,r4 /* Load up to 32 bytes */ 179 stswx r24,0,r3 /* Store up to 32 bytes */ 180 181 mr r3,r8 /* Return dst */ 182 183 lmw r24,8(r1) 184 addi r1,r1,(10*4) 185 blr 186 #endif 187
Indexes created Sat Oct 11 16:09:52 GMT 2025