ev64260_locore.S revision 1.12.2.1
1 /* $NetBSD: ev64260_locore.S,v 1.12.2.1 2010/04/30 14:39:17 uebayasi 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 "opt_ppcparam.h" 37 #include "opt_ipkdb.h" 38 #include "opt_modular.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/spr.h> 55 #include <powerpc/oea/bat.h> 56 #include <powerpc/oea/hid.h> 57 58 /* 59 * Some instructions gas doesn't understand (yet?) 60 */ 61 #define bdneq bdnzf 2, 62 63 /* 64 * Globals 65 */ 66 GLOBAL(startsym) 67 .long 0 /* start symbol table */ 68 GLOBAL(endsym) 69 .long 0 /* end symbol table */ 70 GLOBAL(oeacpufeat) 71 .long 0 /* cpu features */ 72 /* 73 * File-scope for locore.S 74 */ 75 #ifdef DINK 76 .data 77 dink_return: 78 .long 0 /* fake uarea during idle after exit */ 79 dink_stack: 80 .long 0 /* fake uarea during idle after exit */ 81 #endif 82 83 84 /* 85 * This symbol is here for the benefit of kvm_mkdb, and is supposed to 86 * mark the start of kernel text. 87 */ 88 .text 89 .globl _C_LABEL(kernel_text) 90 _C_LABEL(kernel_text): 91 92 /* 93 * Startup entry. Note, this must be the first thing in the text 94 * segment! 95 */ 96 .text 97 .globl __start 98 __start: 99 #ifdef DINK 100 mflr 0 101 lis 8, dink_stack@ha 102 stw 1, dink_stack@l(8) 103 lis 8, dink_return@ha 104 stw 0, dink_return@l(8) 105 #endif 106 107 #if 0 108 eieio; sync 109 lis 8, 0xf100f104@ha 110 lwz 7, -3836(8) 111 li 0, 1 112 andc 7,7,0 113 stw 7, -3836(8) 114 eieio; sync 115 #endif 116 117 /* 118 * Make sure that .bss is zeroed. 119 */ 120 li 0,0 121 lis 8,edata@ha 122 addi 8,8,edata@l 123 lis 9,end@ha 124 addi 9,9,end@l 125 5: cmpw 0,8,9 /* edata & end are >= word aligned */ 126 bge 6f 127 stw 0,0(8) 128 addi 8,8,4 129 b 5b 130 6: 131 132 li 0,0 133 mtmsr 0 /* Disable FPU/MMU/exceptions */ 134 sync ; isync 135 136 #if 1 137 mfpvr 0 138 srwi 0,0,16 139 cmplwi 0,MPC7410 140 bne 16f 141 142 #if 0 143 /* flush and disable L2 */ 144 mfspr 8,SPR_L2CR 145 lis 0,(L2CR_L2E|L2CR_L2WT)@h /* disable the L2 mode */ 146 andc 8,8,0 147 ori 8,8,L2CR_L2HWF /* enable hardware flush */ 148 sync 149 mtspr SPR_L2CR,8 /* do it */ 150 sync /* wait for it to finish */ 151 152 /* Disable data lock mode */ 153 mfspr 8,SPR_HID0 154 li 0,HID0_DLOCK 155 andc 8,8,0 156 mtspr SPR_HID0,8 157 sync 158 #endif 159 #if 0 160 /* 161 * Flush the L1 cache 162 */ 163 mfspr 8,SPR_MSSCR0 164 oris 8,8,MSSCR0_DL1HWF@h 165 sync 166 mtspr SPR_MSSCR0,8 167 sync 168 #endif 169 #if 1 170 /* disable data and instruction caches */ 171 mfspr 8,SPR_HID0 172 li 0,HID0_DLOCK@l 173 andc 8,8,0 174 sync 175 mtspr SPR_HID0,8 176 sync 177 isync 178 #endif 179 7: 180 #if 0 181 /* disable data and instruction caches */ 182 mfspr 8,SPR_HID0 183 li 0,(HID0_ICE|HID0_DCE)@l 184 andc 8,8,0 185 sync 186 mtspr SPR_HID0,8 187 sync 188 isync 189 #endif 190 7: 191 #if 0 192 /* Enable and flush data and instruction caches */ 193 ori 8,8,(HID0_ICFI|HID0_ICE|HID0_DCFI|HID0_DCE) 194 # ori 8,8,(HID0_ICFI|HID0_ICE) 195 mtspr SPR_HID0,8 196 isync 197 8: sync 198 mfspr 8,SPR_HID0 199 andi. 0,8,(HID0_ICFI|HID0_DCFI) 200 bne 8b 201 #endif 202 203 #if 0 204 mfspr 8,SPR_L2CR 205 oris 8,8,L2CR_L2E@h 206 sync 207 mtspr SPR_L2CR,8 208 sync 209 #endif 210 16: 211 #endif 212 213 /* compute end of kernel memory */ 214 lis 8,_C_LABEL(end)@ha 215 addi 8,8,_C_LABEL(end)@l 216 #if NKSYMS || defined(DDB) || defined(MODULAR) 217 lis 7,_C_LABEL(startsym)@ha 218 addi 7,7,_C_LABEL(startsym)@l 219 stw 3,0(7) 220 lis 7,_C_LABEL(endsym)@ha 221 addi 7,7,_C_LABEL(endsym)@l 222 stw 4,0(7) 223 /* mr 8,4 * end of symbol table */ 224 #endif 225 mr 4,8 /* end of mem reserved for kernel */ 226 INIT_CPUINFO(4,1,9,0) 227 228 lis 3,__start@ha 229 addi 3,3,__start@l 230 li 5,0 231 li 6,0 232 233 bl _C_LABEL(initppc) 234 bl _C_LABEL(main) 235 236 loop: b loop /* XXX not reached */ 237 238 #if 0 239 .globl _C_LABEL(extintr_enable) 240 _C_LABEL(extintr_enable): 241 mfmsr 3 242 ori 3,3,PSL_EE@l 243 sync 244 mtmsr 3 245 blr 246 247 .globl _C_LABEL(extintr_restore) 248 _C_LABEL(extintr_restore): 249 mfmsr 4 250 or 3,4,3 251 sync 252 mtmsr 3 253 blr 254 255 .globl _C_LABEL(extintr_disable) 256 _C_LABEL(extintr_disable): 257 mfmsr 3 258 andi. 4,3,~PSL_EE@l 259 sync 260 mtmsr 4 261 andi. 3,3,PSL_EE@l 262 blr 263 264 .globl _C_LABEL(mvpppc_reboot) 265 _C_LABEL(mvpppc_reboot): 266 mfmsr 3 267 ori 3,3,PSL_IP@l 268 sync 269 mtmsr 3 270 b 0xFFF00100 271 #endif 272 273 #ifdef DINK 274 .globl _C_LABEL(return_to_dink) 275 _C_LABEL(return_to_dink): 276 sync 277 lis 4, dink_stack@ha 278 lwz 1, dink_stack@l(4) 279 lis 4, dink_return@ha 280 lwz 5, dink_return@l(4) 281 mtlr 5 282 blr 283 #endif 284 285 /* 286 * Include common switch / setfault code 287 */ 288 #include <powerpc/powerpc/locore_subr.S> 289 290 /* 291 * Include common trap / exception code 292 */ 293 #include <powerpc/powerpc/trap_subr.S> 294 295 /* 296 * Include PIO routines 297 */ 298 #include <powerpc/powerpc/pio_subr.S> 299
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