1 /* $NetBSD: ibm4xx_machdep.c,v 1.39 2024/03/05 14:15:34 thorpej Exp $ */ 2 /* Original: ibm40x_machdep.c,v 1.3 2005/01/17 17:19:36 shige Exp $ */ 3 4 /* 5 * Copyright 2001, 2002 Wasabi Systems, Inc. 6 * All rights reserved. 7 * 8 * Written by Eduardo Horvath and Simon Burge for Wasabi Systems, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed for the NetBSD Project by 21 * Wasabi Systems, Inc. 22 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 23 * or promote products derived from this software without specific prior 24 * written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 41 * Copyright (C) 1995, 1996 TooLs GmbH. 42 * All rights reserved. 43 * 44 * Redistribution and use in source and binary forms, with or without 45 * modification, are permitted provided that the following conditions 46 * are met: 47 * 1. Redistributions of source code must retain the above copyright 48 * notice, this list of conditions and the following disclaimer. 49 * 2. Redistributions in binary form must reproduce the above copyright 50 * notice, this list of conditions and the following disclaimer in the 51 * documentation and/or other materials provided with the distribution. 52 * 3. All advertising materials mentioning features or use of this software 53 * must display the following acknowledgement: 54 * This product includes software developed by TooLs GmbH. 55 * 4. The name of TooLs GmbH may not be used to endorse or promote products 56 * derived from this software without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 59 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 60 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 61 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 62 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 63 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 64 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 65 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 66 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 67 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 68 */ 69 70 #include <sys/cdefs.h> 71 __KERNEL_RCSID(0, "$NetBSD: ibm4xx_machdep.c,v 1.39 2024/03/05 14:15:34 thorpej Exp $"); 72 73 #include "ksyms.h" 74 75 #ifdef _KERNEL_OPT 76 #include "opt_ddb.h" 77 #include "opt_kgdb.h" 78 #include "opt_modular.h" 79 #endif 80 81 #include <sys/param.h> 82 #include <sys/cpu.h> 83 #include <sys/ksyms.h> 84 #include <sys/mount.h> 85 #include <sys/msgbuf.h> 86 #include <sys/pmf.h> 87 #include <sys/proc.h> 88 #include <sys/reboot.h> 89 #include <sys/systm.h> 90 91 #include <dev/cons.h> 92 93 #include <uvm/uvm_extern.h> 94 95 #if defined(DDB) 96 #include <machine/db_machdep.h> 97 #include <ddb/db_extern.h> 98 #endif 99 100 #if defined(KGDB) 101 #include <sys/kgdb.h> 102 #endif 103 104 #include <machine/powerpc.h> 105 #include <machine/trap.h> 106 107 #include <powerpc/pcb.h> 108 #include <powerpc/spr.h> 109 110 #include <powerpc/ibm4xx/cpu.h> 111 #include <powerpc/ibm4xx/spr.h> 112 113 /* 114 * Global variables used here and there 115 */ 116 paddr_t msgbuf_paddr; 117 vaddr_t msgbuf_vaddr; 118 char msgbuf[MSGBUFSIZE]; 119 120 #if NKSYMS || defined(DDB) || defined(MODULAR) 121 void *startsym, *endsym; 122 #endif 123 124 #ifdef MODULAR 125 register_t cpu_psluserset = PSL_USERSET; 126 register_t cpu_pslusermod = PSL_USERMOD; 127 register_t cpu_pslusermask = PSL_USERMASK; 128 #endif 129 130 /* 131 * Trap vectors 132 */ 133 extern const uint32_t defaulttrap[], defaultsize; 134 extern const uint32_t sctrap[], scsize; 135 extern const uint32_t accesstrap[], accesssize; 136 extern const uint32_t criticaltrap[], criticalsize; 137 extern const uint32_t tlbimiss4xx[], tlbim4size; 138 extern const uint32_t tlbdmiss4xx[], tlbdm4size; 139 extern const uint32_t pitfitwdog[], pitfitwdogsize; 140 extern const uint32_t errata51handler[], errata51size; 141 #if defined(DDB) 142 extern const uint32_t ddblow[], ddbsize; 143 #endif 144 static const struct exc_info trap_table[] = { 145 { EXC_SC, sctrap, (uintptr_t)&scsize }, 146 { EXC_ALI, accesstrap, (uintptr_t)&accesssize }, 147 { EXC_DSI, accesstrap, (uintptr_t)&accesssize }, 148 { EXC_MCHK, criticaltrap, (uintptr_t)&criticalsize }, 149 { EXC_ITMISS, tlbimiss4xx, (uintptr_t)&tlbim4size }, 150 { EXC_DTMISS, tlbdmiss4xx, (uintptr_t)&tlbdm4size }, 151 { EXC_PIT, pitfitwdog, (uintptr_t)&pitfitwdogsize }, 152 { EXC_DEBUG, criticaltrap, (uintptr_t)&criticalsize }, 153 { (EXC_DTMISS|EXC_ALI), 154 errata51handler, (uintptr_t)&errata51size }, 155 #if defined(DDB) 156 { EXC_PGM, ddblow, (uintptr_t)&ddbsize }, 157 #else 158 { EXC_PGM, accesstrap, (uintptr_t)&accesssize }, 159 #endif 160 }; 161 162 void 163 cpu_reboot(int howto, char *what) 164 { 165 static int syncing; 166 static char str[256]; 167 char *ap = str, *ap1 = ap; 168 169 boothowto = howto; 170 if (!cold && !(howto & RB_NOSYNC) && !syncing) { 171 syncing = 1; 172 vfs_shutdown(); /* sync */ 173 } 174 175 splhigh(); 176 177 if (!cold && (howto & RB_DUMP)) 178 ibm4xx_dumpsys(); 179 180 doshutdownhooks(); 181 182 pmf_system_shutdown(boothowto); 183 184 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 185 /* Power off here if we know how... */ 186 } 187 188 if (howto & RB_HALT) { 189 printf("The operating system has halted.\n" 190 "Press any key to reboot.\n\n"); 191 192 cnpollc(1); 193 cngetc(); 194 cnpollc(0); 195 } 196 197 printf("rebooting...\n\n"); 198 if (what && *what) { 199 if (strlen(what) > sizeof(str) - 5) 200 printf("boot string too large, ignored\n"); 201 else { 202 strcpy(str, what); 203 ap1 = ap = str + strlen(str); 204 *ap++ = ' '; 205 } 206 } 207 *ap++ = '-'; 208 if (howto & RB_SINGLE) 209 *ap++ = 's'; 210 if (howto & RB_KDB) 211 *ap++ = 'd'; 212 *ap++ = '\0'; 213 if (ap[-2] == '-') 214 *ap1 = '\0'; 215 216 /* flush cache for msgbuf */ 217 __syncicache((void *)msgbuf_paddr, round_page(MSGBUFSIZE)); 218 219 ppc4xx_reset(); 220 221 printf("ppc4xx_reset() failed!\n"); 222 223 for (;;) { 224 #if defined(DDB) 225 Debugger(); 226 #elif defined(KGDB) 227 kgdb_connect(1); 228 #else 229 continue; 230 #endif 231 } 232 } 233 234 /* 235 * Install a trap vector. We cannot use memcpy because the 236 * destination may be zero. 237 */ 238 static void 239 trap_copy(const uint32_t *src, vaddr_t dest, size_t len) 240 { 241 uint32_t *dest_p = (void *)dest; 242 243 while (len > 0) { 244 *dest_p++ = *src++; 245 len -= sizeof(uint32_t); 246 } 247 } 248 249 /* 250 * ibm4xx_init: 251 */ 252 void 253 ibm4xx_init(vaddr_t startkernel, vaddr_t endkernel, void (*handler)(void)) 254 { 255 /* Initialize cache info for memcpy, etc. */ 256 cpu_probe_cache(); 257 258 /* 259 * Initialize current pcb and pmap pointers. 260 */ 261 KASSERT(curcpu() == &cpu_info[0]); 262 KASSERT(lwp0.l_cpu == curcpu()); 263 KASSERT(curlwp == &lwp0); 264 265 curpcb = lwp_getpcb(curlwp); 266 memset(curpcb, 0, sizeof(struct pcb)); 267 268 curpcb->pcb_pm = pmap_kernel(); 269 270 for (uintptr_t exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) { 271 trap_copy(defaulttrap, exc, (uintptr_t)&defaultsize); 272 } 273 274 for (size_t i = 0; i < __arraycount(trap_table); i++) { 275 KASSERT(trap_table[i].exc_size <= 0x100); 276 trap_copy(trap_table[i].exc_addr, trap_table[i].exc_vector, 277 trap_table[i].exc_size); 278 } 279 280 __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100); 281 282 mtspr(SPR_EVPR, 0); /* Set Exception vector base */ 283 284 /* Handle trap instruction as PGM exception */ 285 mtspr(SPR_DBCR0, mfspr(SPR_DBCR0) & ~DBCR0_TDE); 286 287 /* 288 * external interrupt handler install 289 */ 290 if (handler) 291 ibm4xx_install_extint(handler); 292 293 /* 294 * Now enable translation (and machine checks/recoverable interrupts). 295 */ 296 __asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 297 : : "r" (0), "K" (PSL_IR|PSL_DR)); 298 /* XXXX PSL_ME - With ME set kernel gets stuck... */ 299 300 /* 301 * turn on console after enable translation 302 */ 303 consinit(); 304 305 uvm_md_init(); 306 307 /* 308 * Initialize pmap module. 309 */ 310 pmap_bootstrap(startkernel, endkernel); 311 312 /* 313 * Let's take all the indirect calls via our stubs and patch 314 * them to be direct calls. 315 */ 316 cpu_fixup_stubs(); 317 318 #if NKSYMS || defined(DDB) || defined(MODULAR) 319 ksyms_addsyms_elf((uintptr_t)endsym - (uintptr_t)startsym, 320 startsym, endsym); 321 #endif 322 } 323 324 void 325 ibm4xx_install_extint(void (*handler)(void)) 326 { 327 extern int extint, extsize; 328 extern u_long extint_call; 329 u_long offset = (u_long)handler - (u_long)&extint_call; 330 int msr; 331 332 #ifdef DIAGNOSTIC 333 if (offset > 0x1ffffff) 334 panic("install_extint: too far away"); 335 #endif 336 __asm volatile ("mfmsr %0; wrteei 0" : "=r" (msr)); 337 extint_call = (extint_call & 0xfc000003) | offset; 338 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize); 339 __syncicache((void *)&extint_call, sizeof extint_call); 340 __syncicache((void *)EXC_EXI, (int)&extsize); 341 __asm volatile ("mtmsr %0" :: "r" (msr)); 342 } 343 344 /* 345 * ibm4xx_cpu_startup: 346 * Machine dependent startup code. 347 */ 348 void 349 ibm4xx_cpu_startup(const char *model) 350 { 351 vaddr_t minaddr, maxaddr; 352 char pbuf[9]; 353 354 KASSERT(curcpu() != NULL); 355 KASSERT(lwp0.l_cpu != NULL); 356 KASSERT(curcpu()->ci_intstk != 0); 357 KASSERT(curcpu()->ci_idepth == -1); 358 359 /* 360 * Initialize error message buffer (at end of core). 361 */ 362 #if 0 /* For some reason this fails... --Artem 363 * Besides, do we really have to put it at the end of core? 364 * Let's use static buffer for now 365 */ 366 if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE), 367 0, UVM_KMF_VAONLY))) 368 panic("startup: no room for message buffer"); 369 for (i = 0; i < btoc(MSGBUFSIZE); i++) 370 pmap_kenter_pa(msgbuf_vaddr + i * PAGE_SIZE, 371 msgbuf_paddr + i * PAGE_SIZE, 372 VM_PROT_READ|VM_PROT_WRITE, 0); 373 initmsgbuf((void *)msgbuf_vaddr, round_page(MSGBUFSIZE)); 374 #else 375 initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE)); 376 #endif 377 378 printf("%s%s", copyright, version); 379 if (model != NULL) 380 printf("Model: %s\n", model); 381 382 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 383 printf("total memory = %s\n", pbuf); 384 385 minaddr = 0; 386 /* 387 * Allocate a submap for physio 388 */ 389 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 390 VM_PHYS_SIZE, 0, false, NULL); 391 392 /* 393 * No need to allocate an mbuf cluster submap. Mbuf clusters 394 * are allocated via the pool allocator, and we use direct-mapped 395 * pool pages. 396 */ 397 398 format_bytes(pbuf, sizeof(pbuf), ptoa(uvm_availmem(false))); 399 printf("avail memory = %s\n", pbuf); 400 } 401 402 /* 403 * ibm4xx_dumpsys: 404 * Crash dump handling. 405 */ 406 void 407 ibm4xx_dumpsys(void) 408 { 409 410 printf("dumpsys: TBD\n"); 411 } 412
Indexes created Sun Sep 21 14:09:52 GMT 2025