ev64260_locore.S revision 1.6
1 /* $NetBSD: ev64260_locore.S,v 1.6 2003/07/31 07:50:05 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 #define _NOREGNAMES 51 #include <machine/asm.h> 52 53 #include <powerpc/spr.h> 54 #include <powerpc/oea/bat.h> 55 #include <powerpc/oea/hid.h> 56 57 /* 58 * Some instructions gas doesn't understand (yet?) 59 */ 60 #define bdneq bdnzf 2, 61 62 /* 63 * Globals 64 */ 65 GLOBAL(startsym) 66 .long 0 /* start symbol table */ 67 GLOBAL(endsym) 68 .long 0 /* end symbol table */ 69 GLOBAL(proc0paddr) 70 .long 0 /* proc0 p_addr */ 71 72 GLOBAL(intrnames) 73 GLOBAL(eintrnames) 74 GLOBAL(intrcnt) 75 GLOBAL(eintrcnt) 76 .long 0 /* vmstat needs these. XXX */ 77 78 /* 79 * File-scope for locore.S 80 */ 81 #ifdef DINK 82 .data 83 dink_return: 84 .long 0 /* fake uarea during idle after exit */ 85 dink_stack: 86 .long 0 /* fake uarea during idle after exit */ 87 #endif 88 89 90 /* 91 * This symbol is here for the benefit of kvm_mkdb, and is supposed to 92 * mark the start of kernel text. 93 */ 94 .text 95 .globl _C_LABEL(kernel_text) 96 _C_LABEL(kernel_text): 97 98 /* 99 * Startup entry. Note, this must be the first thing in the text 100 * segment! 101 */ 102 .text 103 .globl __start 104 __start: 105 #ifdef DINK 106 mflr 0 107 lis 8, dink_stack@ha 108 stw 1, dink_stack@l(8) 109 lis 8, dink_return@ha 110 stw 0, dink_return@l(8) 111 #endif 112 113 #if 0 114 eieio; sync 115 lis 8, 0xf100f104@ha 116 lwz 7, -3836(8) 117 li 0, 1 118 andc 7,7,0 119 stw 7, -3836(8) 120 eieio; sync 121 #endif 122 123 /* 124 * Make sure that .bss is zeroed. 125 */ 126 li 0,0 127 lis 8,edata@ha 128 addi 8,8,edata@l 129 lis 9,end@ha 130 addi 9,9,end@l 131 5: cmpw 0,8,9 /* edata & end are >= word aligned */ 132 bge 6f 133 stw 0,0(8) 134 addi 8,8,4 135 b 5b 136 6: 137 138 li 0,0 139 mtmsr 0 /* Disable FPU/MMU/exceptions */ 140 sync ; isync 141 142 #if 1 143 mfpvr 0 144 srwi 0,0,16 145 cmplwi 0,MPC7410 146 bne 16f 147 148 #if 0 149 /* flush and disable L2 */ 150 mfspr 8,SPR_L2CR 151 lis 0,(L2CR_L2E|L2CR_L2WT)@h /* disable the L2 mode */ 152 andc 8,8,0 153 ori 8,8,L2CR_L2HWF /* enable hardware flush */ 154 sync 155 mtspr SPR_L2CR,8 /* do it */ 156 sync /* wait for it to finish */ 157 158 /* Disable data lock mode */ 159 mfspr 8,SPR_HID0 160 li 0,HID0_DLOCK 161 andc 8,8,0 162 mtspr SPR_HID0,8 163 sync 164 #endif 165 #if 0 166 /* 167 * Flush the L1 cache 168 */ 169 mfspr 8,SPR_MSSCR0 170 oris 8,8,MSSCR0_DL1HWF@h 171 sync 172 mtspr SPR_MSSCR0,8 173 sync 174 #endif 175 #if 1 176 /* disable data and instruction caches */ 177 mfspr 8,SPR_HID0 178 li 0,HID0_DLOCK@l 179 andc 8,8,0 180 sync 181 mtspr SPR_HID0,8 182 sync 183 isync 184 #endif 185 7: 186 #if 0 187 /* disable data and instruction caches */ 188 mfspr 8,SPR_HID0 189 li 0,(HID0_ICE|HID0_DCE)@l 190 andc 8,8,0 191 sync 192 mtspr SPR_HID0,8 193 sync 194 isync 195 #endif 196 7: 197 #if 0 198 /* Enable and flush data and instruction caches */ 199 ori 8,8,(HID0_ICFI|HID0_ICE|HID0_DCFI|HID0_DCE) 200 # ori 8,8,(HID0_ICFI|HID0_ICE) 201 mtspr SPR_HID0,8 202 isync 203 8: sync 204 mfspr 8,SPR_HID0 205 andi. 0,8,(HID0_ICFI|HID0_DCFI) 206 bne 8b 207 #endif 208 209 #if 0 210 mfspr 8,SPR_L2CR 211 oris 8,8,L2CR_L2E@h 212 sync 213 mtspr SPR_L2CR,8 214 sync 215 #endif 216 16: 217 #endif 218 219 /* compute end of kernel memory */ 220 lis 8,_C_LABEL(end)@ha 221 addi 8,8,_C_LABEL(end)@l 222 #if NKSYMS || defined(DDB) || defined(LKM) || defined(KERNFS) 223 lis 7,_C_LABEL(startsym)@ha 224 addi 7,7,_C_LABEL(startsym)@l 225 stw 3,0(7) 226 lis 7,_C_LABEL(endsym)@ha 227 addi 7,7,_C_LABEL(endsym)@l 228 stw 4,0(7) 229 /* mr 8,4 * end of symbol table */ 230 #endif 231 mr 4,8 /* end of mem reserved for kernel */ 232 INIT_CPUINFO(4,1,9,0) 233 234 lis 3,__start@ha 235 addi 3,3,__start@l 236 li 5,0 237 li 6,0 238 239 bl _C_LABEL(initppc) 240 bl _C_LABEL(main) 241 242 loop: b loop /* XXX not reached */ 243 244 #if 0 245 .globl _C_LABEL(extintr_enable) 246 _C_LABEL(extintr_enable): 247 mfmsr 3 248 ori 3,3,PSL_EE@l 249 sync 250 mtmsr 3 251 blr 252 253 .globl _C_LABEL(extintr_restore) 254 _C_LABEL(extintr_restore): 255 mfmsr 4 256 or 3,4,3 257 sync 258 mtmsr 3 259 blr 260 261 .globl _C_LABEL(extintr_disable) 262 _C_LABEL(extintr_disable): 263 mfmsr 3 264 andi. 4,3,~PSL_EE@l 265 sync 266 mtmsr 4 267 andi. 3,3,PSL_EE@l 268 blr 269 270 .globl _C_LABEL(mvpppc_reboot) 271 _C_LABEL(mvpppc_reboot): 272 mfmsr 3 273 ori 3,3,PSL_IP@l 274 sync 275 mtmsr 3 276 b 0xFFF00100 277 #endif 278 279 #ifdef DINK 280 .globl _C_LABEL(return_to_dink) 281 _C_LABEL(return_to_dink): 282 sync 283 lis 4, dink_stack@ha 284 lwz 1, dink_stack@l(4) 285 lis 4, dink_return@ha 286 lwz 5, dink_return@l(4) 287 mtlr 5 288 blr 289 #endif 290 291 /* 292 * Include common switch / setfault code 293 */ 294 #include <powerpc/powerpc/locore_subr.S> 295 296 /* 297 * Include common trap / execption code 298 */ 299 #include <powerpc/powerpc/trap_subr.S> 300 301 /* 302 * Include PIO routines 303 */ 304 #include <powerpc/powerpc/pio_subr.S> 305
Indexes created Sun Oct 12 05:10:08 GMT 2025