ev64260_locore.S revision 1.2
1 /* $NetBSD: ev64260_locore.S,v 1.2 2003/03/16 07:07:19 matt Exp $ */ 2 /* $OpenBSD: locore.S,v 1.4 1997/01/26 09:06:38 rahnds Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 6 * Copyright (C) 1995, 1996 TooLs GmbH. 7 * All rights reserved. 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 by TooLs GmbH. 20 * 4. The name of TooLs GmbH may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 28 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 29 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 31 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 32 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include "opt_ddb.h" 36 #include "fs_kernfs.h" 37 #include "opt_ppcparam.h" 38 #include "opt_ipkdb.h" 39 #include "opt_multiprocessor.h" 40 #include "opt_openpic.h" 41 #include "assym.h" 42 43 #include <sys/syscall.h> 44 45 #include <machine/param.h> 46 #include <machine/vmparam.h> 47 #include <machine/pmap.h> 48 #include <machine/psl.h> 49 #include <machine/trap.h> 50 #include <machine/asm.h> 51 52 #include <powerpc/spr.h> 53 #include <powerpc/oea/bat.h> 54 #include <powerpc/oea/hid.h> 55 56 /* 57 * Some instructions gas doesn't understand (yet?) 58 */ 59 #define bdneq bdnzf 2, 60 61 /* 62 * Globals 63 */ 64 GLOBAL(startsym) 65 .long 0 /* start symbol table */ 66 GLOBAL(endsym) 67 .long 0 /* end symbol table */ 68 GLOBAL(proc0paddr) 69 .long 0 /* proc0 p_addr */ 70 71 /* 72 * File-scope for locore.S 73 */ 74 #ifdef DINK 75 .data 76 dink_return: 77 .long 0 /* fake uarea during idle after exit */ 78 dink_stack: 79 .long 0 /* fake uarea during idle after exit */ 80 #endif 81 82 /* 83 * This symbol is here for the benefit of kvm_mkdb, and is supposed to 84 * mark the start of kernel text. 85 */ 86 .text 87 .globl _C_LABEL(kernel_text) 88 _C_LABEL(kernel_text): 89 90 /* 91 * Startup entry. Note, this must be the first thing in the text 92 * segment! 93 */ 94 .text 95 .globl __start 96 __start: 97 #ifdef DINK 98 mflr 0 99 lis 8, dink_stack@ha 100 stw 1, dink_stack@l(8) 101 lis 8, dink_return@ha 102 stw 0, dink_return@l(8) 103 #endif 104 105 #if 0 106 eieio; sync 107 lis 8, 0xf100f104@ha 108 lwz 7, -3836(8) 109 li 0, 1 110 andc 7,7,0 111 stw 7, -3836(8) 112 eieio; sync 113 #endif 114 115 /* 116 * Make sure that .bss is zeroed. 117 */ 118 li 0,0 119 lis 8,edata@ha 120 addi 8,8,edata@l 121 lis 9,end@ha 122 addi 9,9,end@l 123 5: cmpw 0,8,9 /* edata & end are >= word aligned */ 124 bge 6f 125 stw 0,0(8) 126 addi 8,8,4 127 b 5b 128 6: 129 130 li 0,0 131 mtmsr 0 /* Disable FPU/MMU/exceptions */ 132 sync ; isync 133 134 #if 1 135 /* Enable data and instruction caches */ 136 mfspr 8,SPR_HID0 137 li 0,HID0_DLOCK 138 ori 8,8,(HID0_ICE | HID0_DCE)@l 139 andc 8,8,0 140 mtspr SPR_HID0,8 141 #endif 142 143 /* compute end of kernel memory */ 144 lis 8,_C_LABEL(end)@ha 145 addi 8,8,_C_LABEL(end)@l 146 #if defined(DDB) || defined(KERNFS) 147 lis 7,_C_LABEL(startsym)@ha 148 addi 7,7,_C_LABEL(startsym)@l 149 stw 3,0(7) 150 lis 7,_C_LABEL(endsym)@ha 151 addi 7,7,_C_LABEL(endsym)@l 152 stw 4,0(7) 153 /* mr 8,4 * end of symbol table */ 154 #endif 155 mr 4,8 /* end of mem reserved for kernel */ 156 INIT_CPUINFO(4,1,9,0) 157 158 lis 3,__start@ha 159 addi 3,3,__start@l 160 li 5,0 161 li 6,0 162 163 bl _C_LABEL(initppc) 164 bl _C_LABEL(main) 165 166 loop: b loop /* XXX not reached */ 167 168 #if 0 169 .globl _C_LABEL(extintr_enable) 170 _C_LABEL(extintr_enable): 171 mfmsr 3 172 ori 3,3,PSL_EE@l 173 sync 174 mtmsr 3 175 blr 176 177 .globl _C_LABEL(extintr_restore) 178 _C_LABEL(extintr_restore): 179 mfmsr 4 180 or 3,4,3 181 sync 182 mtmsr 3 183 blr 184 185 .globl _C_LABEL(extintr_disable) 186 _C_LABEL(extintr_disable): 187 mfmsr 3 188 andi. 4,3,~PSL_EE@l 189 sync 190 mtmsr 4 191 andi. 3,3,PSL_EE@l 192 blr 193 194 .globl _C_LABEL(mvpppc_reboot) 195 _C_LABEL(mvpppc_reboot): 196 mfmsr 3 197 ori 3,3,PSL_IP@l 198 sync 199 mtmsr 3 200 b 0xFFF00100 201 #endif 202 203 #ifdef DINK 204 .globl _C_LABEL(return_to_dink) 205 _C_LABEL(return_to_dink): 206 sync 207 lis 4, dink_stack@ha 208 lwz 1, dink_stack@l(4) 209 lis 4, dink_return@ha 210 lwz 5, dink_return@l(4) 211 mtlr 5 212 blr 213 #endif 214 215 /* 216 * Include common switch / setfault code 217 */ 218 #include <powerpc/powerpc/locore_subr.S> 219 220 /* 221 * Include common trap / execption code 222 */ 223 #include <powerpc/powerpc/trap_subr.S> 224 225 /* 226 * Include PIO routines 227 */ 228 #include <powerpc/powerpc/pio_subr.S> 229
Indexes created Sat Oct 11 19:10:01 GMT 2025