ibm4xx_machdep.c revision 1.7.44.2
1 /* $NetBSD: ibm4xx_machdep.c,v 1.7.44.2 2010/03/11 15:02:49 yamt 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 1.7.44.2 2010/03/11 15:02:49 yamt Exp $"); 72 73 #include "opt_compat_netbsd.h" 74 #include "opt_ddb.h" 75 #include "opt_kgdb.h" 76 #include "opt_ipkdb.h" 77 78 #include <sys/param.h> 79 #include <sys/msgbuf.h> 80 #include <sys/proc.h> 81 82 #include <uvm/uvm_extern.h> 83 84 #if defined(DDB) 85 #include <machine/db_machdep.h> 86 #include <ddb/db_extern.h> 87 #endif 88 89 #if defined(KGDB) 90 #include <sys/kgdb.h> 91 #endif 92 93 #if defined(IPKDB) 94 #include <ipkdb/ipkdb.h> 95 #endif 96 97 #include <machine/powerpc.h> 98 #include <powerpc/spr.h> 99 #include <powerpc/ibm4xx/spr.h> 100 #include <machine/trap.h> 101 102 /* 103 * Global variables used here and there 104 */ 105 paddr_t msgbuf_paddr; 106 vaddr_t msgbuf_vaddr; 107 char msgbuf[MSGBUFSIZE]; 108 109 /* 110 * ibm4xx_init: 111 */ 112 void 113 ibm4xx_init(void (*handler)(void)) 114 { 115 extern int defaulttrap, defaultsize; 116 extern int sctrap, scsize; 117 extern int alitrap, alisize; 118 extern int dsitrap, dsisize; 119 extern int isitrap, isisize; 120 extern int mchktrap, mchksize; 121 extern int tlbimiss4xx, tlbim4size; 122 extern int tlbdmiss4xx, tlbdm4size; 123 extern int pitfitwdog, pitfitwdogsize; 124 extern int debugtrap, debugsize; 125 extern int errata51handler, errata51size; 126 #ifdef DDB 127 extern int ddblow, ddbsize; 128 #endif 129 #ifdef IPKDB 130 extern int ipkdblow, ipkdbsize; 131 #endif 132 uintptr_t exc; 133 struct cpu_info * const ci = curcpu(); 134 135 /* Initialize cache info for memcpy, etc. */ 136 cpu_probe_cache(); 137 138 /* 139 * Initialize lwp0 and current pcb and pmap pointers. 140 */ 141 KASSERT(ci != NULL); 142 KASSERT(curcpu() == ci); 143 lwp0.l_cpu = ci; 144 145 curpcb = lwp_getpcb(&lwp0); 146 memset(curpcb, 0, sizeof(struct pcb)); 147 148 curpcb->pcb_pm = pmap_kernel(); 149 150 /* 151 * Set up trap vectors 152 */ 153 for (exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) 154 switch (exc) { 155 default: 156 memcpy((void *)exc, &defaulttrap, (size_t)&defaultsize); 157 break; 158 case EXC_EXI: 159 /* 160 * This one is (potentially) installed during autoconf 161 */ 162 break; 163 case EXC_SC: 164 memcpy((void *)EXC_SC, &sctrap, (size_t)&scsize); 165 break; 166 case EXC_ALI: 167 memcpy((void *)EXC_ALI, &alitrap, (size_t)&alisize); 168 break; 169 case EXC_DSI: 170 memcpy((void *)EXC_DSI, &dsitrap, (size_t)&dsisize); 171 break; 172 case EXC_ISI: 173 memcpy((void *)EXC_ISI, &isitrap, (size_t)&isisize); 174 break; 175 case EXC_MCHK: 176 memcpy((void *)EXC_MCHK, &mchktrap, (size_t)&mchksize); 177 break; 178 case EXC_ITMISS: 179 memcpy((void *)EXC_ITMISS, &tlbimiss4xx, 180 (size_t)&tlbim4size); 181 break; 182 case EXC_DTMISS: 183 memcpy((void *)EXC_DTMISS, &tlbdmiss4xx, 184 (size_t)&tlbdm4size); 185 break; 186 /* 187 * EXC_PIT, EXC_FIT, EXC_WDOG handlers 188 * are spaced by 0x10 bytes only.. 189 */ 190 case EXC_PIT: 191 memcpy((void *)EXC_PIT, &pitfitwdog, 192 (size_t)&pitfitwdogsize); 193 break; 194 case EXC_DEBUG: 195 memcpy((void *)EXC_DEBUG, &debugtrap, 196 (size_t)&debugsize); 197 break; 198 case EXC_DTMISS|EXC_ALI: 199 /* PPC405GP Rev D errata item 51 */ 200 memcpy((void *)(EXC_DTMISS|EXC_ALI), &errata51handler, 201 (size_t)&errata51size); 202 break; 203 #if defined(DDB) || defined(IPKDB) 204 case EXC_PGM: 205 #if defined(DDB) 206 memcpy((void *)exc, &ddblow, (size_t)&ddbsize); 207 #elif defined(IPKDB) 208 memcpy((void *)exc, &ipkdblow, (size_t)&ipkdbsize); 209 #endif 210 #endif /* DDB | IPKDB */ 211 break; 212 } 213 214 __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100); 215 mtspr(SPR_EVPR, 0); /* Set Exception vector base */ 216 217 consinit(); 218 219 /* Handle trap instruction as PGM exception */ 220 { 221 int dbcr0; 222 __asm volatile("mfspr %0,%1":"=r"(dbcr0):"K"(SPR_DBCR0)); 223 __asm volatile("mtspr %0,%1"::"K"(SPR_DBCR0),"r"(dbcr0 & ~DBCR0_TDE)); 224 } 225 226 /* 227 * external interrupt handler install 228 */ 229 if (handler) 230 ibm4xx_install_extint(handler); 231 232 /* 233 * Now enable translation (and machine checks/recoverable interrupts). 234 */ 235 __asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 236 : : "r"(0), "K"(PSL_IR|PSL_DR)); 237 /* XXXX PSL_ME - With ME set kernel gets stuck... */ 238 239 KASSERT(curcpu() == ci); 240 } 241 242 void 243 ibm4xx_install_extint(void (*handler)(void)) 244 { 245 extern int extint, extsize; 246 extern u_long extint_call; 247 u_long offset = (u_long)handler - (u_long)&extint_call; 248 int msr; 249 250 #ifdef DIAGNOSTIC 251 if (offset > 0x1ffffff) 252 panic("install_extint: too far away"); 253 #endif 254 __asm volatile ("mfmsr %0; wrteei 0" : "=r"(msr)); 255 extint_call = (extint_call & 0xfc000003) | offset; 256 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize); 257 __syncicache((void *)&extint_call, sizeof extint_call); 258 __syncicache((void *)EXC_EXI, (int)&extsize); 259 __asm volatile ("mtmsr %0" :: "r"(msr)); 260 } 261 262 /* 263 * ibm4xx_cpu_startup: 264 * Machine dependent startup code. 265 */ 266 void 267 ibm4xx_cpu_startup(const char *model) 268 { 269 vaddr_t minaddr, maxaddr; 270 char pbuf[9]; 271 272 KASSERT(curcpu() != NULL); 273 KASSERT(lwp0.l_cpu != NULL); 274 KASSERT(curcpu()->ci_intstk != 0); 275 KASSERT(curcpu()->ci_intrdepth == -1); 276 277 /* 278 * Initialize error message buffer (at end of core). 279 */ 280 #if 0 /* For some reason this fails... --Artem 281 * Besides, do we really have to put it at the end of core? 282 * Let's use static buffer for now 283 */ 284 if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE), 285 0, UVM_KMF_VAONLY))) 286 panic("startup: no room for message buffer"); 287 for (i = 0; i < btoc(MSGBUFSIZE); i++) 288 pmap_kenter_pa(msgbuf_vaddr + i * PAGE_SIZE, 289 msgbuf_paddr + i * PAGE_SIZE, 290 VM_PROT_READ|VM_PROT_WRITE, 0); 291 initmsgbuf((void *)msgbuf_vaddr, round_page(MSGBUFSIZE)); 292 #else 293 initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE)); 294 #endif 295 296 printf("%s%s", copyright, version); 297 if (model != NULL) 298 printf("Model: %s\n", model); 299 300 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 301 printf("total memory = %s\n", pbuf); 302 303 minaddr = 0; 304 /* 305 * Allocate a submap for physio 306 */ 307 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 308 VM_PHYS_SIZE, 0, false, NULL); 309 310 /* 311 * No need to allocate an mbuf cluster submap. Mbuf clusters 312 * are allocated via the pool allocator, and we use direct-mapped 313 * pool pages. 314 */ 315 316 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 317 printf("avail memory = %s\n", pbuf); 318 } 319 320 /* 321 * ibm4xx_dumpsys: 322 * Crash dump handling. 323 */ 324 void 325 ibm4xx_dumpsys(void) 326 { 327 328 printf("dumpsys: TBD\n"); 329 } 330
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