1 /* $NetBSD: ev64260_locore.S,v 1.21 2021/02/26 02:18:56 thorpej 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 /* 67 * File-scope for locore.S 68 */ 69 #ifdef DINK 70 .data 71 dink_return: 72 .long 0 /* fake uarea during idle after exit */ 73 dink_stack: 74 .long 0 /* fake uarea during idle after exit */ 75 #endif 76 77 78 /* 79 * This symbol is here for the benefit of kvm_mkdb, and is supposed to 80 * mark the start of kernel text. 81 */ 82 .text 83 .globl _C_LABEL(kernel_text) 84 _C_LABEL(kernel_text): 85 86 /* 87 * Startup entry. Note, this must be the first thing in the text 88 * segment! 89 */ 90 .text 91 .globl __start 92 __start: 93 #ifdef DINK 94 mflr 0 95 lis 8, dink_stack@ha 96 stw 1, dink_stack@l(8) 97 lis 8, dink_return@ha 98 stw 0, dink_return@l(8) 99 #endif 100 101 #if 0 102 eieio; sync 103 lis 8, 0xf100f104@ha 104 lwz 7, -3836(8) 105 li 0, 1 106 andc 7,7,0 107 stw 7, -3836(8) 108 eieio; sync 109 #endif 110 111 /* 112 * Make sure that .bss is zeroed. 113 */ 114 li 0,0 115 lis 8,edata@ha 116 addi 8,8,edata@l 117 lis 9,end@ha 118 addi 9,9,end@l 119 5: cmpw 0,8,9 /* edata & end are >= word aligned */ 120 bge 6f 121 stw 0,0(8) 122 addi 8,8,4 123 b 5b 124 6: 125 126 li 0,0 127 mtmsr 0 /* Disable FPU/MMU/exceptions */ 128 sync ; isync 129 130 #if 1 131 mfpvr 0 132 srwi 0,0,16 133 cmplwi 0,MPC7410 134 bne 16f 135 136 #if 0 137 /* flush and disable L2 */ 138 mfspr 8,SPR_L2CR 139 lis 0,(L2CR_L2E|L2CR_L2WT)@h /* disable the L2 mode */ 140 andc 8,8,0 141 ori 8,8,L2CR_L2HWF /* enable hardware flush */ 142 sync 143 mtspr SPR_L2CR,8 /* do it */ 144 sync /* wait for it to finish */ 145 146 /* Disable data lock mode */ 147 mfspr 8,SPR_HID0 148 li 0,HID0_DLOCK 149 andc 8,8,0 150 mtspr SPR_HID0,8 151 sync 152 #endif 153 #if 0 154 /* 155 * Flush the L1 cache 156 */ 157 mfspr 8,SPR_MSSCR0 158 oris 8,8,MSSCR0_DL1HWF@h 159 sync 160 mtspr SPR_MSSCR0,8 161 sync 162 #endif 163 #if 1 164 /* disable data and instruction caches */ 165 mfspr 8,SPR_HID0 166 li 0,HID0_DLOCK@l 167 andc 8,8,0 168 sync 169 mtspr SPR_HID0,8 170 sync 171 isync 172 #endif 173 7: 174 #if 0 175 /* disable data and instruction caches */ 176 mfspr 8,SPR_HID0 177 li 0,(HID0_ICE|HID0_DCE)@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 /* Enable and flush data and instruction caches */ 187 ori 8,8,(HID0_ICFI|HID0_ICE|HID0_DCFI|HID0_DCE) 188 # ori 8,8,(HID0_ICFI|HID0_ICE) 189 mtspr SPR_HID0,8 190 isync 191 8: sync 192 mfspr 8,SPR_HID0 193 andi. 0,8,(HID0_ICFI|HID0_DCFI) 194 bne 8b 195 #endif 196 197 #if 0 198 mfspr 8,SPR_L2CR 199 oris 8,8,L2CR_L2E@h 200 sync 201 mtspr SPR_L2CR,8 202 sync 203 #endif 204 16: 205 #endif 206 207 /* compute end of kernel memory */ 208 lis 8,_C_LABEL(end)@ha 209 addi 8,8,_C_LABEL(end)@l 210 #if NKSYMS || defined(DDB) || defined(MODULAR) 211 lis 7,_C_LABEL(startsym)@ha 212 addi 7,7,_C_LABEL(startsym)@l 213 stw 3,0(7) 214 lis 7,_C_LABEL(endsym)@ha 215 addi 7,7,_C_LABEL(endsym)@l 216 stw 4,0(7) 217 /* mr 8,4 * end of symbol table */ 218 #endif 219 mr 4,8 /* end of mem reserved for kernel */ 220 INIT_CPUINFO(4,1,9,0) 221 222 lis 3,__start@ha 223 addi 3,3,__start@l 224 li 5,0 225 li 6,0 226 227 bl _C_LABEL(cpu_model_init) 228 bl _C_LABEL(initppc) 229 bl _C_LABEL(main) 230 231 loop: b loop /* XXX not reached */ 232 233 #if 0 234 .globl _C_LABEL(extintr_enable) 235 _C_LABEL(extintr_enable): 236 mfmsr 3 237 ori 3,3,PSL_EE@l 238 sync 239 mtmsr 3 240 blr 241 242 .globl _C_LABEL(extintr_restore) 243 _C_LABEL(extintr_restore): 244 mfmsr 4 245 or 3,4,3 246 sync 247 mtmsr 3 248 blr 249 250 .globl _C_LABEL(extintr_disable) 251 _C_LABEL(extintr_disable): 252 mfmsr 3 253 andi. 4,3,~PSL_EE@l 254 sync 255 mtmsr 4 256 andi. 3,3,PSL_EE@l 257 blr 258 259 .globl _C_LABEL(mvpppc_reboot) 260 _C_LABEL(mvpppc_reboot): 261 mfmsr 3 262 ori 3,3,PSL_IP@l 263 sync 264 mtmsr 3 265 b 0xFFF00100 266 #endif 267 268 #ifdef DINK 269 .globl _C_LABEL(return_to_dink) 270 _C_LABEL(return_to_dink): 271 sync 272 lis 4, dink_stack@ha 273 lwz 1, dink_stack@l(4) 274 lis 4, dink_return@ha 275 lwz 5, dink_return@l(4) 276 mtlr 5 277 blr 278 #endif 279 280 /* 281 * Include common switch / setfault code 282 */ 283 #include <powerpc/powerpc/locore_subr.S> 284 285 /* 286 * Include common trap / exception code 287 */ 288 #include <powerpc/powerpc/trap_subr.S> 289 290 /* 291 * Include PIO routines 292 */ 293 #include <powerpc/powerpc/pio_subr.S> 294
Indexes created Sat Oct 11 16:09:52 GMT 2025