ev64260_locore.S revision 1.17.2.1
1 /* $NetBSD: ev64260_locore.S,v 1.17.2.1 2011/06/23 14:19:08 cherry 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/psl.h> 47 #include <machine/trap.h> 48 #include <machine/asm.h> 49 50 #include <powerpc/spr.h> 51 #include <powerpc/oea/spr.h> 52 #include <powerpc/oea/bat.h> 53 #include <powerpc/oea/hid.h> 54 55 /* 56 * Some instructions gas doesn't understand (yet?) 57 */ 58 #define bdneq bdnzf 2, 59 60 /* 61 * Globals 62 */ 63 GLOBAL(startsym) 64 .long 0 /* start symbol table */ 65 GLOBAL(endsym) 66 .long 0 /* end symbol table */ 67 GLOBAL(oeacpufeat) 68 .long 0 /* cpu features */ 69 /* 70 * File-scope for locore.S 71 */ 72 #ifdef DINK 73 .data 74 dink_return: 75 .long 0 /* fake uarea during idle after exit */ 76 dink_stack: 77 .long 0 /* fake uarea during idle after exit */ 78 #endif 79 80 81 /* 82 * This symbol is here for the benefit of kvm_mkdb, and is supposed to 83 * mark the start of kernel text. 84 */ 85 .text 86 .globl _C_LABEL(kernel_text) 87 _C_LABEL(kernel_text): 88 89 /* 90 * Startup entry. Note, this must be the first thing in the text 91 * segment! 92 */ 93 .text 94 .globl __start 95 __start: 96 #ifdef DINK 97 mflr 0 98 lis 8, dink_stack@ha 99 stw 1, dink_stack@l(8) 100 lis 8, dink_return@ha 101 stw 0, dink_return@l(8) 102 #endif 103 104 #if 0 105 eieio; sync 106 lis 8, 0xf100f104@ha 107 lwz 7, -3836(8) 108 li 0, 1 109 andc 7,7,0 110 stw 7, -3836(8) 111 eieio; sync 112 #endif 113 114 /* 115 * Make sure that .bss is zeroed. 116 */ 117 li 0,0 118 lis 8,edata@ha 119 addi 8,8,edata@l 120 lis 9,end@ha 121 addi 9,9,end@l 122 5: cmpw 0,8,9 /* edata & end are >= word aligned */ 123 bge 6f 124 stw 0,0(8) 125 addi 8,8,4 126 b 5b 127 6: 128 129 li 0,0 130 mtmsr 0 /* Disable FPU/MMU/exceptions */ 131 sync ; isync 132 133 #if 1 134 mfpvr 0 135 srwi 0,0,16 136 cmplwi 0,MPC7410 137 bne 16f 138 139 #if 0 140 /* flush and disable L2 */ 141 mfspr 8,SPR_L2CR 142 lis 0,(L2CR_L2E|L2CR_L2WT)@h /* disable the L2 mode */ 143 andc 8,8,0 144 ori 8,8,L2CR_L2HWF /* enable hardware flush */ 145 sync 146 mtspr SPR_L2CR,8 /* do it */ 147 sync /* wait for it to finish */ 148 149 /* Disable data lock mode */ 150 mfspr 8,SPR_HID0 151 li 0,HID0_DLOCK 152 andc 8,8,0 153 mtspr SPR_HID0,8 154 sync 155 #endif 156 #if 0 157 /* 158 * Flush the L1 cache 159 */ 160 mfspr 8,SPR_MSSCR0 161 oris 8,8,MSSCR0_DL1HWF@h 162 sync 163 mtspr SPR_MSSCR0,8 164 sync 165 #endif 166 #if 1 167 /* disable data and instruction caches */ 168 mfspr 8,SPR_HID0 169 li 0,HID0_DLOCK@l 170 andc 8,8,0 171 sync 172 mtspr SPR_HID0,8 173 sync 174 isync 175 #endif 176 7: 177 #if 0 178 /* disable data and instruction caches */ 179 mfspr 8,SPR_HID0 180 li 0,(HID0_ICE|HID0_DCE)@l 181 andc 8,8,0 182 sync 183 mtspr SPR_HID0,8 184 sync 185 isync 186 #endif 187 7: 188 #if 0 189 /* Enable and flush data and instruction caches */ 190 ori 8,8,(HID0_ICFI|HID0_ICE|HID0_DCFI|HID0_DCE) 191 # ori 8,8,(HID0_ICFI|HID0_ICE) 192 mtspr SPR_HID0,8 193 isync 194 8: sync 195 mfspr 8,SPR_HID0 196 andi. 0,8,(HID0_ICFI|HID0_DCFI) 197 bne 8b 198 #endif 199 200 #if 0 201 mfspr 8,SPR_L2CR 202 oris 8,8,L2CR_L2E@h 203 sync 204 mtspr SPR_L2CR,8 205 sync 206 #endif 207 16: 208 #endif 209 210 /* compute end of kernel memory */ 211 lis 8,_C_LABEL(end)@ha 212 addi 8,8,_C_LABEL(end)@l 213 #if NKSYMS || defined(DDB) || defined(MODULAR) 214 lis 7,_C_LABEL(startsym)@ha 215 addi 7,7,_C_LABEL(startsym)@l 216 stw 3,0(7) 217 lis 7,_C_LABEL(endsym)@ha 218 addi 7,7,_C_LABEL(endsym)@l 219 stw 4,0(7) 220 /* mr 8,4 * end of symbol table */ 221 #endif 222 mr 4,8 /* end of mem reserved for kernel */ 223 INIT_CPUINFO(4,1,9,0) 224 225 lis 3,__start@ha 226 addi 3,3,__start@l 227 li 5,0 228 li 6,0 229 230 bl _C_LABEL(cpu_model_init) 231 bl _C_LABEL(initppc) 232 bl _C_LABEL(main) 233 234 loop: b loop /* XXX not reached */ 235 236 #if 0 237 .globl _C_LABEL(extintr_enable) 238 _C_LABEL(extintr_enable): 239 mfmsr 3 240 ori 3,3,PSL_EE@l 241 sync 242 mtmsr 3 243 blr 244 245 .globl _C_LABEL(extintr_restore) 246 _C_LABEL(extintr_restore): 247 mfmsr 4 248 or 3,4,3 249 sync 250 mtmsr 3 251 blr 252 253 .globl _C_LABEL(extintr_disable) 254 _C_LABEL(extintr_disable): 255 mfmsr 3 256 andi. 4,3,~PSL_EE@l 257 sync 258 mtmsr 4 259 andi. 3,3,PSL_EE@l 260 blr 261 262 .globl _C_LABEL(mvpppc_reboot) 263 _C_LABEL(mvpppc_reboot): 264 mfmsr 3 265 ori 3,3,PSL_IP@l 266 sync 267 mtmsr 3 268 b 0xFFF00100 269 #endif 270 271 #ifdef DINK 272 .globl _C_LABEL(return_to_dink) 273 _C_LABEL(return_to_dink): 274 sync 275 lis 4, dink_stack@ha 276 lwz 1, dink_stack@l(4) 277 lis 4, dink_return@ha 278 lwz 5, dink_return@l(4) 279 mtlr 5 280 blr 281 #endif 282 283 /* 284 * Include common switch / setfault code 285 */ 286 #include <powerpc/powerpc/locore_subr.S> 287 288 /* 289 * Include common trap / exception code 290 */ 291 #include <powerpc/powerpc/trap_subr.S> 292 293 /* 294 * Include PIO routines 295 */ 296 #include <powerpc/powerpc/pio_subr.S> 297
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