1 /* $NetBSD: ibm4xx_machdep.c,v 1.25 2016/12/26 21:25:08 rin 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 1.25 2016/12/26 21:25:08 rin 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 #include "ksyms.h" /* for NKSYMS */ 79 80 #include <sys/param.h> 81 #include <sys/msgbuf.h> 82 #include <sys/proc.h> 83 #include <sys/cpu.h> 84 #include <sys/ksyms.h> 85 86 #include <uvm/uvm_extern.h> 87 88 #if defined(DDB) 89 #include <machine/db_machdep.h> 90 #include <ddb/db_extern.h> 91 #endif 92 93 #if defined(KGDB) 94 #include <sys/kgdb.h> 95 #endif 96 97 #if defined(IPKDB) 98 #include <ipkdb/ipkdb.h> 99 #endif 100 101 #include <machine/powerpc.h> 102 #include <powerpc/pcb.h> 103 #include <machine/trap.h> 104 105 #include <powerpc/spr.h> 106 #include <powerpc/ibm4xx/spr.h> 107 108 #include <powerpc/ibm4xx/cpu.h> 109 110 /* 111 * Global variables used here and there 112 */ 113 paddr_t msgbuf_paddr; 114 vaddr_t msgbuf_vaddr; 115 char msgbuf[MSGBUFSIZE]; 116 117 #if NKSYMS || defined(DDB) || defined(MODULAR) 118 void *startsym, *endsym; 119 #endif 120 121 /* 122 * Trap vectors 123 */ 124 extern const uint32_t defaulttrap[], defaultsize; 125 extern const uint32_t sctrap[], scsize; 126 extern const uint32_t accesstrap[], accesssize; 127 extern const uint32_t criticaltrap[], criticalsize; 128 extern const uint32_t tlbimiss4xx[], tlbim4size; 129 extern const uint32_t tlbdmiss4xx[], tlbdm4size; 130 extern const uint32_t pitfitwdog[], pitfitwdogsize; 131 extern const uint32_t errata51handler[], errata51size; 132 #if defined(DDB) 133 extern const uint32_t ddblow[], ddbsize; 134 #elif defined(IPKDB) 135 extern const uint32_t ipkdblow[], ipkdbsize; 136 #endif 137 static const struct exc_info trap_table[] = { 138 { EXC_SC, sctrap, (uintptr_t)&scsize }, 139 { EXC_ALI, accesstrap, (uintptr_t)&accesssize }, 140 { EXC_DSI, accesstrap, (uintptr_t)&accesssize }, 141 { EXC_MCHK, criticaltrap, (uintptr_t)&criticalsize }, 142 { EXC_ITMISS, tlbimiss4xx, (uintptr_t)&tlbim4size }, 143 { EXC_DTMISS, tlbdmiss4xx, (uintptr_t)&tlbdm4size }, 144 { EXC_PIT, pitfitwdog, (uintptr_t)&pitfitwdogsize }, 145 { EXC_DEBUG, criticaltrap, (uintptr_t)&criticalsize }, 146 { (EXC_DTMISS|EXC_ALI), 147 errata51handler, (uintptr_t)&errata51size }, 148 #if defined(DDB) 149 { EXC_PGM, ddblow, (uintptr_t)&ddbsize }, 150 #elif defined(IPKDB) 151 { EXC_PGM, ipkdblow, (uintptr_t)&ipkdbsize }, 152 #endif 153 }; 154 155 /* 156 * Install a trap vector. We cannot use memcpy because the 157 * destination may be zero. 158 */ 159 static void 160 trap_copy(const uint32_t *src, vaddr_t dest, size_t len) 161 { 162 uint32_t *dest_p = (void *)dest; 163 164 while (len > 0) { 165 *dest_p++ = *src++; 166 len -= sizeof(uint32_t); 167 } 168 } 169 170 /* 171 * ibm4xx_init: 172 */ 173 void 174 ibm4xx_init(vaddr_t startkernel, vaddr_t endkernel, void (*handler)(void)) 175 { 176 /* Initialize cache info for memcpy, etc. */ 177 cpu_probe_cache(); 178 179 /* 180 * Initialize current pcb and pmap pointers. 181 */ 182 KASSERT(curcpu() == &cpu_info[0]); 183 KASSERT(lwp0.l_cpu == curcpu()); 184 KASSERT(curlwp == &lwp0); 185 186 curpcb = lwp_getpcb(curlwp); 187 memset(curpcb, 0, sizeof(struct pcb)); 188 189 curpcb->pcb_pm = pmap_kernel(); 190 191 for (uintptr_t exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) { 192 trap_copy(defaulttrap, exc, (uintptr_t)&defaultsize); 193 } 194 195 for (size_t i = 0; i < __arraycount(trap_table); i++) { 196 KASSERT(trap_table[i].exc_size <= 0x100); 197 trap_copy(trap_table[i].exc_addr, trap_table[i].exc_vector, 198 trap_table[i].exc_size); 199 } 200 201 __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100); 202 203 mtspr(SPR_EVPR, 0); /* Set Exception vector base */ 204 205 /* Handle trap instruction as PGM exception */ 206 mtspr(SPR_DBCR0, mfspr(SPR_DBCR0) & ~DBCR0_TDE); 207 208 /* 209 * external interrupt handler install 210 */ 211 if (handler) 212 ibm4xx_install_extint(handler); 213 214 /* 215 * Now enable translation (and machine checks/recoverable interrupts). 216 */ 217 __asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 218 : : "r"(0), "K"(PSL_IR|PSL_DR)); 219 /* XXXX PSL_ME - With ME set kernel gets stuck... */ 220 221 /* 222 * turn on console after enable translation 223 */ 224 consinit(); 225 226 uvm_md_init(); 227 228 /* 229 * Initialize pmap module. 230 */ 231 pmap_bootstrap(startkernel, endkernel); 232 233 /* 234 * Let's take all the indirect calls via our stubs and patch 235 * them to be direct calls. 236 */ 237 cpu_fixup_stubs(); 238 239 #if NKSYMS || defined(DDB) || defined(MODULAR) 240 ksyms_addsyms_elf((uintptr_t)endsym - (uintptr_t)startsym, 241 startsym, endsym); 242 #endif 243 } 244 245 void 246 ibm4xx_install_extint(void (*handler)(void)) 247 { 248 extern int extint, extsize; 249 extern u_long extint_call; 250 u_long offset = (u_long)handler - (u_long)&extint_call; 251 int msr; 252 253 #ifdef DIAGNOSTIC 254 if (offset > 0x1ffffff) 255 panic("install_extint: too far away"); 256 #endif 257 __asm volatile ("mfmsr %0; wrteei 0" : "=r"(msr)); 258 extint_call = (extint_call & 0xfc000003) | offset; 259 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize); 260 __syncicache((void *)&extint_call, sizeof extint_call); 261 __syncicache((void *)EXC_EXI, (int)&extsize); 262 __asm volatile ("mtmsr %0" :: "r"(msr)); 263 } 264 265 /* 266 * ibm4xx_cpu_startup: 267 * Machine dependent startup code. 268 */ 269 void 270 ibm4xx_cpu_startup(const char *model) 271 { 272 vaddr_t minaddr, maxaddr; 273 char pbuf[9]; 274 275 KASSERT(curcpu() != NULL); 276 KASSERT(lwp0.l_cpu != NULL); 277 KASSERT(curcpu()->ci_intstk != 0); 278 KASSERT(curcpu()->ci_idepth == -1); 279 280 /* 281 * Initialize error message buffer (at end of core). 282 */ 283 #if 0 /* For some reason this fails... --Artem 284 * Besides, do we really have to put it at the end of core? 285 * Let's use static buffer for now 286 */ 287 if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE), 288 0, UVM_KMF_VAONLY))) 289 panic("startup: no room for message buffer"); 290 for (i = 0; i < btoc(MSGBUFSIZE); i++) 291 pmap_kenter_pa(msgbuf_vaddr + i * PAGE_SIZE, 292 msgbuf_paddr + i * PAGE_SIZE, 293 VM_PROT_READ|VM_PROT_WRITE, 0); 294 initmsgbuf((void *)msgbuf_vaddr, round_page(MSGBUFSIZE)); 295 #else 296 initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE)); 297 #endif 298 299 printf("%s%s", copyright, version); 300 if (model != NULL) 301 printf("Model: %s\n", model); 302 303 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 304 printf("total memory = %s\n", pbuf); 305 306 minaddr = 0; 307 /* 308 * Allocate a submap for physio 309 */ 310 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 311 VM_PHYS_SIZE, 0, false, NULL); 312 313 /* 314 * No need to allocate an mbuf cluster submap. Mbuf clusters 315 * are allocated via the pool allocator, and we use direct-mapped 316 * pool pages. 317 */ 318 319 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 320 printf("avail memory = %s\n", pbuf); 321 } 322 323 /* 324 * ibm4xx_dumpsys: 325 * Crash dump handling. 326 */ 327 void 328 ibm4xx_dumpsys(void) 329 { 330 331 printf("dumpsys: TBD\n"); 332 } 333