ibm4xx_machdep.c revision 1.10
1 /* $NetBSD: ibm4xx_machdep.c,v 1.10 2009/11/21 17:40:28 rmind 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 1.10 2009/11/21 17:40:28 rmind 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 <machine/trap.h> 100 101 /* 102 * Global variables used here and there 103 */ 104 extern struct user *proc0paddr; 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 lwp0.l_addr = proc0paddr; 145 memset(lwp0.l_addr, 0, sizeof *lwp0.l_addr); 146 KASSERT(lwp0.l_cpu != NULL); 147 148 curpcb = lwp_getpcb(&lwp0); 149 memset(curpcb, 0, sizeof(*curpcb)); 150 curpcb->pcb_pm = pmap_kernel(); 151 152 /* 153 * Set up trap vectors 154 */ 155 for (exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) 156 switch (exc) { 157 default: 158 memcpy((void *)exc, &defaulttrap, (size_t)&defaultsize); 159 break; 160 case EXC_EXI: 161 /* 162 * This one is (potentially) installed during autoconf 163 */ 164 break; 165 case EXC_SC: 166 memcpy((void *)EXC_SC, &sctrap, (size_t)&scsize); 167 break; 168 case EXC_ALI: 169 memcpy((void *)EXC_ALI, &alitrap, (size_t)&alisize); 170 break; 171 case EXC_DSI: 172 memcpy((void *)EXC_DSI, &dsitrap, (size_t)&dsisize); 173 break; 174 case EXC_ISI: 175 memcpy((void *)EXC_ISI, &isitrap, (size_t)&isisize); 176 break; 177 case EXC_MCHK: 178 memcpy((void *)EXC_MCHK, &mchktrap, (size_t)&mchksize); 179 break; 180 case EXC_ITMISS: 181 memcpy((void *)EXC_ITMISS, &tlbimiss4xx, 182 (size_t)&tlbim4size); 183 break; 184 case EXC_DTMISS: 185 memcpy((void *)EXC_DTMISS, &tlbdmiss4xx, 186 (size_t)&tlbdm4size); 187 break; 188 /* 189 * EXC_PIT, EXC_FIT, EXC_WDOG handlers 190 * are spaced by 0x10 bytes only.. 191 */ 192 case EXC_PIT: 193 memcpy((void *)EXC_PIT, &pitfitwdog, 194 (size_t)&pitfitwdogsize); 195 break; 196 case EXC_DEBUG: 197 memcpy((void *)EXC_DEBUG, &debugtrap, 198 (size_t)&debugsize); 199 break; 200 case EXC_DTMISS|EXC_ALI: 201 /* PPC405GP Rev D errata item 51 */ 202 memcpy((void *)(EXC_DTMISS|EXC_ALI), &errata51handler, 203 (size_t)&errata51size); 204 break; 205 #if defined(DDB) || defined(IPKDB) 206 case EXC_PGM: 207 #if defined(DDB) 208 memcpy((void *)exc, &ddblow, (size_t)&ddbsize); 209 #elif defined(IPKDB) 210 memcpy((void *)exc, &ipkdblow, (size_t)&ipkdbsize); 211 #endif 212 #endif /* DDB | IPKDB */ 213 break; 214 } 215 216 __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100); 217 mtspr(SPR_EVPR, 0); /* Set Exception vector base */ 218 219 consinit(); 220 221 /* Handle trap instruction as PGM exception */ 222 { 223 int dbcr0; 224 __asm volatile("mfspr %0,%1":"=r"(dbcr0):"K"(SPR_DBCR0)); 225 __asm volatile("mtspr %0,%1"::"K"(SPR_DBCR0),"r"(dbcr0 & ~DBCR0_TDE)); 226 } 227 228 /* 229 * external interrupt handler install 230 */ 231 if (handler) 232 ibm4xx_install_extint(handler); 233 234 /* 235 * Now enable translation (and machine checks/recoverable interrupts). 236 */ 237 __asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 238 : : "r"(0), "K"(PSL_IR|PSL_DR)); 239 /* XXXX PSL_ME - With ME set kernel gets stuck... */ 240 241 KASSERT(curcpu() == ci); 242 } 243 244 void 245 ibm4xx_install_extint(void (*handler)(void)) 246 { 247 extern int extint, extsize; 248 extern u_long extint_call; 249 u_long offset = (u_long)handler - (u_long)&extint_call; 250 int msr; 251 252 #ifdef DIAGNOSTIC 253 if (offset > 0x1ffffff) 254 panic("install_extint: too far away"); 255 #endif 256 __asm volatile ("mfmsr %0; wrteei 0" : "=r"(msr)); 257 extint_call = (extint_call & 0xfc000003) | offset; 258 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize); 259 __syncicache((void *)&extint_call, sizeof extint_call); 260 __syncicache((void *)EXC_EXI, (int)&extsize); 261 __asm volatile ("mtmsr %0" :: "r"(msr)); 262 } 263 264 /* 265 * ibm4xx_cpu_startup: 266 * Machine dependent startup code. 267 */ 268 void 269 ibm4xx_cpu_startup(const char *model) 270 { 271 vaddr_t minaddr, maxaddr; 272 char pbuf[9]; 273 274 KASSERT(curcpu() != NULL); 275 KASSERT(lwp0.l_cpu != NULL); 276 KASSERT(curcpu()->ci_intstk != 0); 277 KASSERT(curcpu()->ci_intrdepth == -1); 278 279 /* 280 * Initialize error message buffer (at end of core). 281 */ 282 #if 0 /* For some reason this fails... --Artem 283 * Besides, do we really have to put it at the end of core? 284 * Let's use static buffer for now 285 */ 286 if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE), 287 0, UVM_KMF_VAONLY))) 288 panic("startup: no room for message buffer"); 289 for (i = 0; i < btoc(MSGBUFSIZE); i++) 290 pmap_kenter_pa(msgbuf_vaddr + i * PAGE_SIZE, 291 msgbuf_paddr + i * PAGE_SIZE, 292 VM_PROT_READ|VM_PROT_WRITE, 0); 293 initmsgbuf((void *)msgbuf_vaddr, round_page(MSGBUFSIZE)); 294 #else 295 initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE)); 296 #endif 297 298 printf("%s%s", copyright, version); 299 if (model != NULL) 300 printf("Model: %s\n", model); 301 302 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 303 printf("total memory = %s\n", pbuf); 304 305 minaddr = 0; 306 /* 307 * Allocate a submap for physio 308 */ 309 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 310 VM_PHYS_SIZE, 0, false, NULL); 311 312 /* 313 * No need to allocate an mbuf cluster submap. Mbuf clusters 314 * are allocated via the pool allocator, and we use direct-mapped 315 * pool pages. 316 */ 317 318 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 319 printf("avail memory = %s\n", pbuf); 320 } 321 322 /* 323 * ibm4xx_dumpsys: 324 * Crash dump handling. 325 */ 326 void 327 ibm4xx_dumpsys(void) 328 { 329 330 printf("dumpsys: TBD\n"); 331 } 332
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