ev64260_locore.S revision 1.20
1 /* $NetBSD: ev64260_locore.S,v 1.20 2018/07/15 05:16:42 maxv 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_modular.h" 38 #include "opt_multiprocessor.h" 39 #include "opt_openpic.h" 40 #include "assym.h" 41 42 #include <sys/syscall.h> 43 44 #include <machine/param.h> 45 #include <machine/psl.h> 46 #include <machine/trap.h> 47 #include <machine/asm.h> 48 49 #include <powerpc/spr.h> 50 #include <powerpc/oea/spr.h> 51 #include <powerpc/oea/bat.h> 52 #include <powerpc/oea/hid.h> 53 54 /* 55 * Some instructions gas doesn't understand (yet?) 56 */ 57 #define bdneq bdnzf 2, 58 59 /* 60 * Globals 61 */ 62 GLOBAL(startsym) 63 .long 0 /* start symbol table */ 64 GLOBAL(endsym) 65 .long 0 /* end symbol table */ 66 GLOBAL(oeacpufeat) 67 .long 0 /* cpu features */ 68 /* 69 * File-scope for locore.S 70 */ 71 #ifdef DINK 72 .data 73 dink_return: 74 .long 0 /* fake uarea during idle after exit */ 75 dink_stack: 76 .long 0 /* fake uarea during idle after exit */ 77 #endif 78 79 80 /* 81 * This symbol is here for the benefit of kvm_mkdb, and is supposed to 82 * mark the start of kernel text. 83 */ 84 .text 85 .globl _C_LABEL(kernel_text) 86 _C_LABEL(kernel_text): 87 88 /* 89 * Startup entry. Note, this must be the first thing in the text 90 * segment! 91 */ 92 .text 93 .globl __start 94 __start: 95 #ifdef DINK 96 mflr 0 97 lis 8, dink_stack@ha 98 stw 1, dink_stack@l(8) 99 lis 8, dink_return@ha 100 stw 0, dink_return@l(8) 101 #endif 102 103 #if 0 104 eieio; sync 105 lis 8, 0xf100f104@ha 106 lwz 7, -3836(8) 107 li 0, 1 108 andc 7,7,0 109 stw 7, -3836(8) 110 eieio; sync 111 #endif 112 113 /* 114 * Make sure that .bss is zeroed. 115 */ 116 li 0,0 117 lis 8,edata@ha 118 addi 8,8,edata@l 119 lis 9,end@ha 120 addi 9,9,end@l 121 5: cmpw 0,8,9 /* edata & end are >= word aligned */ 122 bge 6f 123 stw 0,0(8) 124 addi 8,8,4 125 b 5b 126 6: 127 128 li 0,0 129 mtmsr 0 /* Disable FPU/MMU/exceptions */ 130 sync ; isync 131 132 #if 1 133 mfpvr 0 134 srwi 0,0,16 135 cmplwi 0,MPC7410 136 bne 16f 137 138 #if 0 139 /* flush and disable L2 */ 140 mfspr 8,SPR_L2CR 141 lis 0,(L2CR_L2E|L2CR_L2WT)@h /* disable the L2 mode */ 142 andc 8,8,0 143 ori 8,8,L2CR_L2HWF /* enable hardware flush */ 144 sync 145 mtspr SPR_L2CR,8 /* do it */ 146 sync /* wait for it to finish */ 147 148 /* Disable data lock mode */ 149 mfspr 8,SPR_HID0 150 li 0,HID0_DLOCK 151 andc 8,8,0 152 mtspr SPR_HID0,8 153 sync 154 #endif 155 #if 0 156 /* 157 * Flush the L1 cache 158 */ 159 mfspr 8,SPR_MSSCR0 160 oris 8,8,MSSCR0_DL1HWF@h 161 sync 162 mtspr SPR_MSSCR0,8 163 sync 164 #endif 165 #if 1 166 /* disable data and instruction caches */ 167 mfspr 8,SPR_HID0 168 li 0,HID0_DLOCK@l 169 andc 8,8,0 170 sync 171 mtspr SPR_HID0,8 172 sync 173 isync 174 #endif 175 7: 176 #if 0 177 /* disable data and instruction caches */ 178 mfspr 8,SPR_HID0 179 li 0,(HID0_ICE|HID0_DCE)@l 180 andc 8,8,0 181 sync 182 mtspr SPR_HID0,8 183 sync 184 isync 185 #endif 186 7: 187 #if 0 188 /* Enable and flush data and instruction caches */ 189 ori 8,8,(HID0_ICFI|HID0_ICE|HID0_DCFI|HID0_DCE) 190 # ori 8,8,(HID0_ICFI|HID0_ICE) 191 mtspr SPR_HID0,8 192 isync 193 8: sync 194 mfspr 8,SPR_HID0 195 andi. 0,8,(HID0_ICFI|HID0_DCFI) 196 bne 8b 197 #endif 198 199 #if 0 200 mfspr 8,SPR_L2CR 201 oris 8,8,L2CR_L2E@h 202 sync 203 mtspr SPR_L2CR,8 204 sync 205 #endif 206 16: 207 #endif 208 209 /* compute end of kernel memory */ 210 lis 8,_C_LABEL(end)@ha 211 addi 8,8,_C_LABEL(end)@l 212 #if NKSYMS || defined(DDB) || defined(MODULAR) 213 lis 7,_C_LABEL(startsym)@ha 214 addi 7,7,_C_LABEL(startsym)@l 215 stw 3,0(7) 216 lis 7,_C_LABEL(endsym)@ha 217 addi 7,7,_C_LABEL(endsym)@l 218 stw 4,0(7) 219 /* mr 8,4 * end of symbol table */ 220 #endif 221 mr 4,8 /* end of mem reserved for kernel */ 222 INIT_CPUINFO(4,1,9,0) 223 224 lis 3,__start@ha 225 addi 3,3,__start@l 226 li 5,0 227 li 6,0 228 229 bl _C_LABEL(cpu_model_init) 230 bl _C_LABEL(initppc) 231 bl _C_LABEL(main) 232 233 loop: b loop /* XXX not reached */ 234 235 #if 0 236 .globl _C_LABEL(extintr_enable) 237 _C_LABEL(extintr_enable): 238 mfmsr 3 239 ori 3,3,PSL_EE@l 240 sync 241 mtmsr 3 242 blr 243 244 .globl _C_LABEL(extintr_restore) 245 _C_LABEL(extintr_restore): 246 mfmsr 4 247 or 3,4,3 248 sync 249 mtmsr 3 250 blr 251 252 .globl _C_LABEL(extintr_disable) 253 _C_LABEL(extintr_disable): 254 mfmsr 3 255 andi. 4,3,~PSL_EE@l 256 sync 257 mtmsr 4 258 andi. 3,3,PSL_EE@l 259 blr 260 261 .globl _C_LABEL(mvpppc_reboot) 262 _C_LABEL(mvpppc_reboot): 263 mfmsr 3 264 ori 3,3,PSL_IP@l 265 sync 266 mtmsr 3 267 b 0xFFF00100 268 #endif 269 270 #ifdef DINK 271 .globl _C_LABEL(return_to_dink) 272 _C_LABEL(return_to_dink): 273 sync 274 lis 4, dink_stack@ha 275 lwz 1, dink_stack@l(4) 276 lis 4, dink_return@ha 277 lwz 5, dink_return@l(4) 278 mtlr 5 279 blr 280 #endif 281 282 /* 283 * Include common switch / setfault code 284 */ 285 #include <powerpc/powerpc/locore_subr.S> 286 287 /* 288 * Include common trap / exception code 289 */ 290 #include <powerpc/powerpc/trap_subr.S> 291 292 /* 293 * Include PIO routines 294 */ 295 #include <powerpc/powerpc/pio_subr.S> 296
Indexes created Sun Oct 12 05:10:08 GMT 2025