1 /* $NetBSD: ibm4xx_machdep.c,v 1.18 2011/12/12 11:38:26 kiyohara 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 1.18 2011/12/12 11:38:26 kiyohara Exp $"); 72 73 #include "opt_compat_netbsd.h" 74 #include "opt_ddb.h" 75 #include "opt_kgdb.h" 76 #include "opt_ipkdb.h" 77 #include "opt_modular.h" 78 79 #include <sys/param.h> 80 #include <sys/msgbuf.h> 81 #include <sys/proc.h> 82 #include <sys/cpu.h> 83 #include <sys/ksyms.h> 84 85 #include <uvm/uvm_extern.h> 86 87 #if defined(DDB) 88 #include <machine/db_machdep.h> 89 #include <ddb/db_extern.h> 90 #endif 91 92 #if defined(KGDB) 93 #include <sys/kgdb.h> 94 #endif 95 96 #if defined(IPKDB) 97 #include <ipkdb/ipkdb.h> 98 #endif 99 100 #include <machine/powerpc.h> 101 #include <powerpc/pcb.h> 102 #include <machine/trap.h> 103 104 #include <powerpc/spr.h> 105 #include <powerpc/ibm4xx/spr.h> 106 107 #include <powerpc/ibm4xx/cpu.h> 108 109 /* 110 * Global variables used here and there 111 */ 112 paddr_t msgbuf_paddr; 113 vaddr_t msgbuf_vaddr; 114 char msgbuf[MSGBUFSIZE]; 115 116 #if NKSYMS || defined(DDB) || defined(MODULAR) 117 void *startsym, *endsym; 118 #endif 119 120 /* 121 * Trap vectors 122 */ 123 extern const uint32_t defaulttrap[], defaultsize; 124 extern const uint32_t sctrap[], scsize; 125 extern const uint32_t alitrap[], alisize; 126 extern const uint32_t dsitrap[], dsisize; 127 extern const uint32_t isitrap[], isisize; 128 extern const uint32_t mchktrap[], mchksize; 129 extern const uint32_t tlbimiss4xx[], tlbim4size; 130 extern const uint32_t tlbdmiss4xx[], tlbdm4size; 131 extern const uint32_t pitfitwdog[], pitfitwdogsize; 132 extern const uint32_t debugtrap[], debugsize; 133 extern const uint32_t errata51handler[], errata51size; 134 #ifdef DDB 135 extern const uint32_t ddblow[], ddbsize; 136 extern const uint32_t ipkdblow[], ipkdbsize; 137 #endif 138 static const struct exc_info trap_table[] = { 139 { EXC_SC, sctrap, (uintptr_t)&scsize }, 140 { EXC_ALI, alitrap, (uintptr_t)&alisize }, 141 { EXC_DSI, dsitrap, (uintptr_t)&dsisize }, 142 { EXC_ISI, isitrap, (uintptr_t)&isisize }, 143 { EXC_MCHK, mchktrap, (uintptr_t)&mchksize }, 144 { EXC_ITMISS, tlbimiss4xx, (uintptr_t)&tlbim4size }, 145 { EXC_DTMISS, tlbdmiss4xx, (uintptr_t)&tlbdm4size }, 146 { EXC_PIT, pitfitwdog, (uintptr_t)&pitfitwdogsize }, 147 { EXC_DEBUG, debugtrap, (uintptr_t)&debugsize }, 148 { (EXC_DTMISS|EXC_ALI), 149 errata51handler, (uintptr_t)&errata51size }, 150 #if defined(DDB) 151 { EXC_PGM, ddblow, (uintptr_t)&ddbsize }, 152 #endif /* DDB */ 153 #if defined(IPKBD) 154 { EXC_PGM, ipkdblow, (uintptr_t)&ipkdbsize }, 155 #endif /* DDB */ 156 }; 157 158 /* 159 * Install a trap vector. We cannot use memcpy because the 160 * destination may be zero. 161 */ 162 static void 163 trap_copy(const uint32_t *src, vaddr_t dest, size_t len) 164 { 165 uint32_t *dest_p = (void *)dest; 166 167 while (len > 0) { 168 *dest_p++ = *src++; 169 len -= sizeof(uint32_t); 170 } 171 } 172 173 /* 174 * ibm4xx_init: 175 */ 176 void 177 ibm4xx_init(vaddr_t startkernel, vaddr_t endkernel, void (*handler)(void)) 178 { 179 /* Initialize cache info for memcpy, etc. */ 180 cpu_probe_cache(); 181 182 /* 183 * Initialize current pcb and pmap pointers. 184 */ 185 KASSERT(curcpu() == &cpu_info[0]); 186 KASSERT(lwp0.l_cpu == curcpu()); 187 KASSERT(curlwp == &lwp0); 188 189 curpcb = lwp_getpcb(curlwp); 190 memset(curpcb, 0, sizeof(struct pcb)); 191 192 curpcb->pcb_pm = pmap_kernel(); 193 194 for (uintptr_t exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) { 195 trap_copy(defaulttrap, exc, (uintptr_t)&defaultsize); 196 } 197 198 for (size_t i = 0; i < __arraycount(trap_table); i++) { 199 trap_copy(trap_table[i].exc_addr, trap_table[i].exc_vector, 200 trap_table[i].exc_size); 201 } 202 203 __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100); 204 205 mtspr(SPR_EVPR, 0); /* Set Exception vector base */ 206 207 /* Handle trap instruction as PGM exception */ 208 mtspr(SPR_DBCR0, mfspr(SPR_DBCR0) & ~DBCR0_TDE); 209 210 /* 211 * external interrupt handler install 212 */ 213 if (handler) 214 ibm4xx_install_extint(handler); 215 216 /* 217 * Now enable translation (and machine checks/recoverable interrupts). 218 */ 219 __asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 220 : : "r"(0), "K"(PSL_IR|PSL_DR)); 221 /* XXXX PSL_ME - With ME set kernel gets stuck... */ 222 223 /* 224 * turn on console after enable translation 225 */ 226 consinit(); 227 228 uvm_setpagesize(); 229 230 /* 231 * Initialize pmap module. 232 */ 233 pmap_bootstrap(startkernel, endkernel); 234 235 /* 236 * Let's take all the indirect calls via our stubs and patch 237 * them to be direct calls. 238 */ 239 cpu_fixup_stubs(); 240 241 #if NKSYMS || defined(DDB) || defined(MODULAR) 242 ksyms_addsyms_elf((uintptr_t)endsym - (uintptr_t)startsym, 243 startsym, endsym); 244 #endif 245 } 246 247 void 248 ibm4xx_install_extint(void (*handler)(void)) 249 { 250 extern int extint, extsize; 251 extern u_long extint_call; 252 u_long offset = (u_long)handler - (u_long)&extint_call; 253 int msr; 254 255 #ifdef DIAGNOSTIC 256 if (offset > 0x1ffffff) 257 panic("install_extint: too far away"); 258 #endif 259 __asm volatile ("mfmsr %0; wrteei 0" : "=r"(msr)); 260 extint_call = (extint_call & 0xfc000003) | offset; 261 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize); 262 __syncicache((void *)&extint_call, sizeof extint_call); 263 __syncicache((void *)EXC_EXI, (int)&extsize); 264 __asm volatile ("mtmsr %0" :: "r"(msr)); 265 } 266 267 /* 268 * ibm4xx_cpu_startup: 269 * Machine dependent startup code. 270 */ 271 void 272 ibm4xx_cpu_startup(const char *model) 273 { 274 vaddr_t minaddr, maxaddr; 275 char pbuf[9]; 276 277 KASSERT(curcpu() != NULL); 278 KASSERT(lwp0.l_cpu != NULL); 279 KASSERT(curcpu()->ci_intstk != 0); 280 KASSERT(curcpu()->ci_idepth == -1); 281 282 /* 283 * Initialize error message buffer (at end of core). 284 */ 285 #if 0 /* For some reason this fails... --Artem 286 * Besides, do we really have to put it at the end of core? 287 * Let's use static buffer for now 288 */ 289 if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE), 290 0, UVM_KMF_VAONLY))) 291 panic("startup: no room for message buffer"); 292 for (i = 0; i < btoc(MSGBUFSIZE); i++) 293 pmap_kenter_pa(msgbuf_vaddr + i * PAGE_SIZE, 294 msgbuf_paddr + i * PAGE_SIZE, 295 VM_PROT_READ|VM_PROT_WRITE, 0); 296 initmsgbuf((void *)msgbuf_vaddr, round_page(MSGBUFSIZE)); 297 #else 298 initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE)); 299 #endif 300 301 printf("%s%s", copyright, version); 302 if (model != NULL) 303 printf("Model: %s\n", model); 304 305 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 306 printf("total memory = %s\n", pbuf); 307 308 minaddr = 0; 309 /* 310 * Allocate a submap for physio 311 */ 312 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 313 VM_PHYS_SIZE, 0, false, NULL); 314 315 /* 316 * No need to allocate an mbuf cluster submap. Mbuf clusters 317 * are allocated via the pool allocator, and we use direct-mapped 318 * pool pages. 319 */ 320 321 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 322 printf("avail memory = %s\n", pbuf); 323 } 324 325 /* 326 * ibm4xx_dumpsys: 327 * Crash dump handling. 328 */ 329 void 330 ibm4xx_dumpsys(void) 331 { 332 333 printf("dumpsys: TBD\n"); 334 } 335