1 /* $NetBSD: ibm4xx_machdep.c,v 1.26 2018/07/15 05:16:43 maxv 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 1.26 2018/07/15 05:16:43 maxv Exp $"); 72 73 #include "opt_compat_netbsd.h" 74 #include "opt_ddb.h" 75 #include "opt_kgdb.h" 76 #include "opt_modular.h" 77 #include "ksyms.h" /* for NKSYMS */ 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 #include <machine/powerpc.h> 97 #include <powerpc/pcb.h> 98 #include <machine/trap.h> 99 100 #include <powerpc/spr.h> 101 #include <powerpc/ibm4xx/spr.h> 102 103 #include <powerpc/ibm4xx/cpu.h> 104 105 /* 106 * Global variables used here and there 107 */ 108 paddr_t msgbuf_paddr; 109 vaddr_t msgbuf_vaddr; 110 char msgbuf[MSGBUFSIZE]; 111 112 #if NKSYMS || defined(DDB) || defined(MODULAR) 113 void *startsym, *endsym; 114 #endif 115 116 /* 117 * Trap vectors 118 */ 119 extern const uint32_t defaulttrap[], defaultsize; 120 extern const uint32_t sctrap[], scsize; 121 extern const uint32_t accesstrap[], accesssize; 122 extern const uint32_t criticaltrap[], criticalsize; 123 extern const uint32_t tlbimiss4xx[], tlbim4size; 124 extern const uint32_t tlbdmiss4xx[], tlbdm4size; 125 extern const uint32_t pitfitwdog[], pitfitwdogsize; 126 extern const uint32_t errata51handler[], errata51size; 127 #if defined(DDB) 128 extern const uint32_t ddblow[], ddbsize; 129 #endif 130 static const struct exc_info trap_table[] = { 131 { EXC_SC, sctrap, (uintptr_t)&scsize }, 132 { EXC_ALI, accesstrap, (uintptr_t)&accesssize }, 133 { EXC_DSI, accesstrap, (uintptr_t)&accesssize }, 134 { EXC_MCHK, criticaltrap, (uintptr_t)&criticalsize }, 135 { EXC_ITMISS, tlbimiss4xx, (uintptr_t)&tlbim4size }, 136 { EXC_DTMISS, tlbdmiss4xx, (uintptr_t)&tlbdm4size }, 137 { EXC_PIT, pitfitwdog, (uintptr_t)&pitfitwdogsize }, 138 { EXC_DEBUG, criticaltrap, (uintptr_t)&criticalsize }, 139 { (EXC_DTMISS|EXC_ALI), 140 errata51handler, (uintptr_t)&errata51size }, 141 #if defined(DDB) 142 { EXC_PGM, ddblow, (uintptr_t)&ddbsize }, 143 #endif 144 }; 145 146 /* 147 * Install a trap vector. We cannot use memcpy because the 148 * destination may be zero. 149 */ 150 static void 151 trap_copy(const uint32_t *src, vaddr_t dest, size_t len) 152 { 153 uint32_t *dest_p = (void *)dest; 154 155 while (len > 0) { 156 *dest_p++ = *src++; 157 len -= sizeof(uint32_t); 158 } 159 } 160 161 /* 162 * ibm4xx_init: 163 */ 164 void 165 ibm4xx_init(vaddr_t startkernel, vaddr_t endkernel, void (*handler)(void)) 166 { 167 /* Initialize cache info for memcpy, etc. */ 168 cpu_probe_cache(); 169 170 /* 171 * Initialize current pcb and pmap pointers. 172 */ 173 KASSERT(curcpu() == &cpu_info[0]); 174 KASSERT(lwp0.l_cpu == curcpu()); 175 KASSERT(curlwp == &lwp0); 176 177 curpcb = lwp_getpcb(curlwp); 178 memset(curpcb, 0, sizeof(struct pcb)); 179 180 curpcb->pcb_pm = pmap_kernel(); 181 182 for (uintptr_t exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) { 183 trap_copy(defaulttrap, exc, (uintptr_t)&defaultsize); 184 } 185 186 for (size_t i = 0; i < __arraycount(trap_table); i++) { 187 KASSERT(trap_table[i].exc_size <= 0x100); 188 trap_copy(trap_table[i].exc_addr, trap_table[i].exc_vector, 189 trap_table[i].exc_size); 190 } 191 192 __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100); 193 194 mtspr(SPR_EVPR, 0); /* Set Exception vector base */ 195 196 /* Handle trap instruction as PGM exception */ 197 mtspr(SPR_DBCR0, mfspr(SPR_DBCR0) & ~DBCR0_TDE); 198 199 /* 200 * external interrupt handler install 201 */ 202 if (handler) 203 ibm4xx_install_extint(handler); 204 205 /* 206 * Now enable translation (and machine checks/recoverable interrupts). 207 */ 208 __asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 209 : : "r"(0), "K"(PSL_IR|PSL_DR)); 210 /* XXXX PSL_ME - With ME set kernel gets stuck... */ 211 212 /* 213 * turn on console after enable translation 214 */ 215 consinit(); 216 217 uvm_md_init(); 218 219 /* 220 * Initialize pmap module. 221 */ 222 pmap_bootstrap(startkernel, endkernel); 223 224 /* 225 * Let's take all the indirect calls via our stubs and patch 226 * them to be direct calls. 227 */ 228 cpu_fixup_stubs(); 229 230 #if NKSYMS || defined(DDB) || defined(MODULAR) 231 ksyms_addsyms_elf((uintptr_t)endsym - (uintptr_t)startsym, 232 startsym, endsym); 233 #endif 234 } 235 236 void 237 ibm4xx_install_extint(void (*handler)(void)) 238 { 239 extern int extint, extsize; 240 extern u_long extint_call; 241 u_long offset = (u_long)handler - (u_long)&extint_call; 242 int msr; 243 244 #ifdef DIAGNOSTIC 245 if (offset > 0x1ffffff) 246 panic("install_extint: too far away"); 247 #endif 248 __asm volatile ("mfmsr %0; wrteei 0" : "=r"(msr)); 249 extint_call = (extint_call & 0xfc000003) | offset; 250 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize); 251 __syncicache((void *)&extint_call, sizeof extint_call); 252 __syncicache((void *)EXC_EXI, (int)&extsize); 253 __asm volatile ("mtmsr %0" :: "r"(msr)); 254 } 255 256 /* 257 * ibm4xx_cpu_startup: 258 * Machine dependent startup code. 259 */ 260 void 261 ibm4xx_cpu_startup(const char *model) 262 { 263 vaddr_t minaddr, maxaddr; 264 char pbuf[9]; 265 266 KASSERT(curcpu() != NULL); 267 KASSERT(lwp0.l_cpu != NULL); 268 KASSERT(curcpu()->ci_intstk != 0); 269 KASSERT(curcpu()->ci_idepth == -1); 270 271 /* 272 * Initialize error message buffer (at end of core). 273 */ 274 #if 0 /* For some reason this fails... --Artem 275 * Besides, do we really have to put it at the end of core? 276 * Let's use static buffer for now 277 */ 278 if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE), 279 0, UVM_KMF_VAONLY))) 280 panic("startup: no room for message buffer"); 281 for (i = 0; i < btoc(MSGBUFSIZE); i++) 282 pmap_kenter_pa(msgbuf_vaddr + i * PAGE_SIZE, 283 msgbuf_paddr + i * PAGE_SIZE, 284 VM_PROT_READ|VM_PROT_WRITE, 0); 285 initmsgbuf((void *)msgbuf_vaddr, round_page(MSGBUFSIZE)); 286 #else 287 initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE)); 288 #endif 289 290 printf("%s%s", copyright, version); 291 if (model != NULL) 292 printf("Model: %s\n", model); 293 294 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 295 printf("total memory = %s\n", pbuf); 296 297 minaddr = 0; 298 /* 299 * Allocate a submap for physio 300 */ 301 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 302 VM_PHYS_SIZE, 0, false, NULL); 303 304 /* 305 * No need to allocate an mbuf cluster submap. Mbuf clusters 306 * are allocated via the pool allocator, and we use direct-mapped 307 * pool pages. 308 */ 309 310 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 311 printf("avail memory = %s\n", pbuf); 312 } 313 314 /* 315 * ibm4xx_dumpsys: 316 * Crash dump handling. 317 */ 318 void 319 ibm4xx_dumpsys(void) 320 { 321 322 printf("dumpsys: TBD\n"); 323 } 324