ev64260_locore.S revision 1.9.28.1
1 /* $NetBSD: ev64260_locore.S,v 1.9.28.1 2011/01/07 01:43:07 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/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(proc0paddr) 71 .long 0 /* proc0 p_addr */ 72 GLOBAL(oeacpufeat) 73 .long 0 /* cpu features */ 74 /* 75 * File-scope for locore.S 76 */ 77 #ifdef DINK 78 .data 79 dink_return: 80 .long 0 /* fake uarea during idle after exit */ 81 dink_stack: 82 .long 0 /* fake uarea during idle after exit */ 83 #endif 84 85 86 /* 87 * This symbol is here for the benefit of kvm_mkdb, and is supposed to 88 * mark the start of kernel text. 89 */ 90 .text 91 .globl _C_LABEL(kernel_text) 92 _C_LABEL(kernel_text): 93 94 /* 95 * Startup entry. Note, this must be the first thing in the text 96 * segment! 97 */ 98 .text 99 .globl __start 100 __start: 101 #ifdef DINK 102 mflr 0 103 lis 8, dink_stack@ha 104 stw 1, dink_stack@l(8) 105 lis 8, dink_return@ha 106 stw 0, dink_return@l(8) 107 #endif 108 109 #if 0 110 eieio; sync 111 lis 8, 0xf100f104@ha 112 lwz 7, -3836(8) 113 li 0, 1 114 andc 7,7,0 115 stw 7, -3836(8) 116 eieio; sync 117 #endif 118 119 /* 120 * Make sure that .bss is zeroed. 121 */ 122 li 0,0 123 lis 8,edata@ha 124 addi 8,8,edata@l 125 lis 9,end@ha 126 addi 9,9,end@l 127 5: cmpw 0,8,9 /* edata & end are >= word aligned */ 128 bge 6f 129 stw 0,0(8) 130 addi 8,8,4 131 b 5b 132 6: 133 134 li 0,0 135 mtmsr 0 /* Disable FPU/MMU/exceptions */ 136 sync ; isync 137 138 #if 1 139 mfpvr 0 140 srwi 0,0,16 141 cmplwi 0,MPC7410 142 bne 16f 143 144 #if 0 145 /* flush and disable L2 */ 146 mfspr 8,SPR_L2CR 147 lis 0,(L2CR_L2E|L2CR_L2WT)@h /* disable the L2 mode */ 148 andc 8,8,0 149 ori 8,8,L2CR_L2HWF /* enable hardware flush */ 150 sync 151 mtspr SPR_L2CR,8 /* do it */ 152 sync /* wait for it to finish */ 153 154 /* Disable data lock mode */ 155 mfspr 8,SPR_HID0 156 li 0,HID0_DLOCK 157 andc 8,8,0 158 mtspr SPR_HID0,8 159 sync 160 #endif 161 #if 0 162 /* 163 * Flush the L1 cache 164 */ 165 mfspr 8,SPR_MSSCR0 166 oris 8,8,MSSCR0_DL1HWF@h 167 sync 168 mtspr SPR_MSSCR0,8 169 sync 170 #endif 171 #if 1 172 /* disable data and instruction caches */ 173 mfspr 8,SPR_HID0 174 li 0,HID0_DLOCK@l 175 andc 8,8,0 176 sync 177 mtspr SPR_HID0,8 178 sync 179 isync 180 #endif 181 7: 182 #if 0 183 /* disable data and instruction caches */ 184 mfspr 8,SPR_HID0 185 li 0,(HID0_ICE|HID0_DCE)@l 186 andc 8,8,0 187 sync 188 mtspr SPR_HID0,8 189 sync 190 isync 191 #endif 192 7: 193 #if 0 194 /* Enable and flush data and instruction caches */ 195 ori 8,8,(HID0_ICFI|HID0_ICE|HID0_DCFI|HID0_DCE) 196 # ori 8,8,(HID0_ICFI|HID0_ICE) 197 mtspr SPR_HID0,8 198 isync 199 8: sync 200 mfspr 8,SPR_HID0 201 andi. 0,8,(HID0_ICFI|HID0_DCFI) 202 bne 8b 203 #endif 204 205 #if 0 206 mfspr 8,SPR_L2CR 207 oris 8,8,L2CR_L2E@h 208 sync 209 mtspr SPR_L2CR,8 210 sync 211 #endif 212 16: 213 #endif 214 215 /* compute end of kernel memory */ 216 lis 8,_C_LABEL(end)@ha 217 addi 8,8,_C_LABEL(end)@l 218 #if NKSYMS || defined(DDB) || defined(LKM) || defined(KERNFS) 219 lis 7,_C_LABEL(startsym)@ha 220 addi 7,7,_C_LABEL(startsym)@l 221 stw 3,0(7) 222 lis 7,_C_LABEL(endsym)@ha 223 addi 7,7,_C_LABEL(endsym)@l 224 stw 4,0(7) 225 /* mr 8,4 * end of symbol table */ 226 #endif 227 mr 4,8 /* end of mem reserved for kernel */ 228 INIT_CPUINFO(4,1,9,0) 229 230 lis 3,__start@ha 231 addi 3,3,__start@l 232 li 5,0 233 li 6,0 234 235 bl _C_LABEL(initppc) 236 bl _C_LABEL(main) 237 238 loop: b loop /* XXX not reached */ 239 240 #if 0 241 .globl _C_LABEL(extintr_enable) 242 _C_LABEL(extintr_enable): 243 mfmsr 3 244 ori 3,3,PSL_EE@l 245 sync 246 mtmsr 3 247 blr 248 249 .globl _C_LABEL(extintr_restore) 250 _C_LABEL(extintr_restore): 251 mfmsr 4 252 or 3,4,3 253 sync 254 mtmsr 3 255 blr 256 257 .globl _C_LABEL(extintr_disable) 258 _C_LABEL(extintr_disable): 259 mfmsr 3 260 andi. 4,3,~PSL_EE@l 261 sync 262 mtmsr 4 263 andi. 3,3,PSL_EE@l 264 blr 265 266 .globl _C_LABEL(mvpppc_reboot) 267 _C_LABEL(mvpppc_reboot): 268 mfmsr 3 269 ori 3,3,PSL_IP@l 270 sync 271 mtmsr 3 272 b 0xFFF00100 273 #endif 274 275 #ifdef DINK 276 .globl _C_LABEL(return_to_dink) 277 _C_LABEL(return_to_dink): 278 sync 279 lis 4, dink_stack@ha 280 lwz 1, dink_stack@l(4) 281 lis 4, dink_return@ha 282 lwz 5, dink_return@l(4) 283 mtlr 5 284 blr 285 #endif 286 287 /* 288 * Include common switch / setfault code 289 */ 290 #include <powerpc/powerpc/locore_subr.S> 291 292 /* 293 * Include common trap / execption code 294 */ 295 #include <powerpc/powerpc/trap_subr.S> 296 297 /* 298 * Include PIO routines 299 */ 300 #include <powerpc/powerpc/pio_subr.S> 301
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