ev64260_locore.S revision 1.5
1 /* $NetBSD: ev64260_locore.S,v 1.5 2003/04/27 10:42:50 ragge 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 GLOBAL(intrnames) 72 GLOBAL(eintrnames) 73 GLOBAL(intrcnt) 74 GLOBAL(eintrcnt) 75 .long 0 /* vmstat needs these. XXX */ 76 77 /* 78 * File-scope for locore.S 79 */ 80 #ifdef DINK 81 .data 82 dink_return: 83 .long 0 /* fake uarea during idle after exit */ 84 dink_stack: 85 .long 0 /* fake uarea during idle after exit */ 86 #endif 87 88 89 /* 90 * This symbol is here for the benefit of kvm_mkdb, and is supposed to 91 * mark the start of kernel text. 92 */ 93 .text 94 .globl _C_LABEL(kernel_text) 95 _C_LABEL(kernel_text): 96 97 /* 98 * Startup entry. Note, this must be the first thing in the text 99 * segment! 100 */ 101 .text 102 .globl __start 103 __start: 104 #ifdef DINK 105 mflr 0 106 lis 8, dink_stack@ha 107 stw 1, dink_stack@l(8) 108 lis 8, dink_return@ha 109 stw 0, dink_return@l(8) 110 #endif 111 112 #if 0 113 eieio; sync 114 lis 8, 0xf100f104@ha 115 lwz 7, -3836(8) 116 li 0, 1 117 andc 7,7,0 118 stw 7, -3836(8) 119 eieio; sync 120 #endif 121 122 /* 123 * Make sure that .bss is zeroed. 124 */ 125 li 0,0 126 lis 8,edata@ha 127 addi 8,8,edata@l 128 lis 9,end@ha 129 addi 9,9,end@l 130 5: cmpw 0,8,9 /* edata & end are >= word aligned */ 131 bge 6f 132 stw 0,0(8) 133 addi 8,8,4 134 b 5b 135 6: 136 137 li 0,0 138 mtmsr 0 /* Disable FPU/MMU/exceptions */ 139 sync ; isync 140 141 #if 1 142 mfpvr 0 143 srwi 0,0,16 144 cmplwi 0,MPC7410 145 bne 16f 146 147 #if 0 148 /* flush and disable L2 */ 149 mfspr 8,SPR_L2CR 150 lis 0,(L2CR_L2E|L2CR_L2WT)@h /* disable the L2 mode */ 151 andc 8,8,0 152 ori 8,8,L2CR_L2HWF /* enable hardware flush */ 153 sync 154 mtspr SPR_L2CR,8 /* do it */ 155 sync /* wait for it to finish */ 156 157 /* Disable data lock mode */ 158 mfspr 8,SPR_HID0 159 li 0,HID0_DLOCK 160 andc 8,8,0 161 mtspr SPR_HID0,8 162 sync 163 #endif 164 #if 0 165 /* 166 * Flush the L1 cache 167 */ 168 mfspr 8,SPR_MSSCR0 169 oris 8,8,MSSCR0_DL1HWF@h 170 sync 171 mtspr SPR_MSSCR0,8 172 sync 173 #endif 174 #if 1 175 /* disable data and instruction caches */ 176 mfspr 8,SPR_HID0 177 li 0,HID0_DLOCK@l 178 andc 8,8,0 179 sync 180 mtspr SPR_HID0,8 181 sync 182 isync 183 #endif 184 7: 185 #if 0 186 /* disable data and instruction caches */ 187 mfspr 8,SPR_HID0 188 li 0,(HID0_ICE|HID0_DCE)@l 189 andc 8,8,0 190 sync 191 mtspr SPR_HID0,8 192 sync 193 isync 194 #endif 195 7: 196 #if 0 197 /* Enable and flush data and instruction caches */ 198 ori 8,8,(HID0_ICFI|HID0_ICE|HID0_DCFI|HID0_DCE) 199 # ori 8,8,(HID0_ICFI|HID0_ICE) 200 mtspr SPR_HID0,8 201 isync 202 8: sync 203 mfspr 8,SPR_HID0 204 andi. 0,8,(HID0_ICFI|HID0_DCFI) 205 bne 8b 206 #endif 207 208 #if 0 209 mfspr 8,SPR_L2CR 210 oris 8,8,L2CR_L2E@h 211 sync 212 mtspr SPR_L2CR,8 213 sync 214 #endif 215 16: 216 #endif 217 218 /* compute end of kernel memory */ 219 lis 8,_C_LABEL(end)@ha 220 addi 8,8,_C_LABEL(end)@l 221 #if NKSYMS || defined(DDB) || defined(LKM) || defined(KERNFS) 222 lis 7,_C_LABEL(startsym)@ha 223 addi 7,7,_C_LABEL(startsym)@l 224 stw 3,0(7) 225 lis 7,_C_LABEL(endsym)@ha 226 addi 7,7,_C_LABEL(endsym)@l 227 stw 4,0(7) 228 /* mr 8,4 * end of symbol table */ 229 #endif 230 mr 4,8 /* end of mem reserved for kernel */ 231 INIT_CPUINFO(4,1,9,0) 232 233 lis 3,__start@ha 234 addi 3,3,__start@l 235 li 5,0 236 li 6,0 237 238 bl _C_LABEL(initppc) 239 bl _C_LABEL(main) 240 241 loop: b loop /* XXX not reached */ 242 243 #if 0 244 .globl _C_LABEL(extintr_enable) 245 _C_LABEL(extintr_enable): 246 mfmsr 3 247 ori 3,3,PSL_EE@l 248 sync 249 mtmsr 3 250 blr 251 252 .globl _C_LABEL(extintr_restore) 253 _C_LABEL(extintr_restore): 254 mfmsr 4 255 or 3,4,3 256 sync 257 mtmsr 3 258 blr 259 260 .globl _C_LABEL(extintr_disable) 261 _C_LABEL(extintr_disable): 262 mfmsr 3 263 andi. 4,3,~PSL_EE@l 264 sync 265 mtmsr 4 266 andi. 3,3,PSL_EE@l 267 blr 268 269 .globl _C_LABEL(mvpppc_reboot) 270 _C_LABEL(mvpppc_reboot): 271 mfmsr 3 272 ori 3,3,PSL_IP@l 273 sync 274 mtmsr 3 275 b 0xFFF00100 276 #endif 277 278 #ifdef DINK 279 .globl _C_LABEL(return_to_dink) 280 _C_LABEL(return_to_dink): 281 sync 282 lis 4, dink_stack@ha 283 lwz 1, dink_stack@l(4) 284 lis 4, dink_return@ha 285 lwz 5, dink_return@l(4) 286 mtlr 5 287 blr 288 #endif 289 290 /* 291 * Include common switch / setfault code 292 */ 293 #include <powerpc/powerpc/locore_subr.S> 294 295 /* 296 * Include common trap / execption code 297 */ 298 #include <powerpc/powerpc/trap_subr.S> 299 300 /* 301 * Include PIO routines 302 */ 303 #include <powerpc/powerpc/pio_subr.S> 304
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