1 /* $NetBSD: ibm4xx_machdep.c,v 1.35 2021/03/06 08:08:19 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 1.35 2021/03/06 08:08:19 rin Exp $"); 72 73 #include "ksyms.h" 74 75 #ifdef _KERNEL_OPT 76 #include "opt_ddb.h" 77 #include "opt_kgdb.h" 78 #include "opt_modular.h" 79 #endif 80 81 #include <sys/param.h> 82 #include <sys/cpu.h> 83 #include <sys/ksyms.h> 84 #include <sys/msgbuf.h> 85 #include <sys/proc.h> 86 87 #include <uvm/uvm_extern.h> 88 89 #if defined(DDB) 90 #include <machine/db_machdep.h> 91 #include <ddb/db_extern.h> 92 #endif 93 94 #if defined(KGDB) 95 #include <sys/kgdb.h> 96 #endif 97 98 #include <machine/powerpc.h> 99 #include <machine/trap.h> 100 101 #include <powerpc/pcb.h> 102 #include <powerpc/spr.h> 103 104 #include <powerpc/ibm4xx/cpu.h> 105 #include <powerpc/ibm4xx/spr.h> 106 107 /* 108 * Global variables used here and there 109 */ 110 paddr_t msgbuf_paddr; 111 vaddr_t msgbuf_vaddr; 112 char msgbuf[MSGBUFSIZE]; 113 114 #if NKSYMS || defined(DDB) || defined(MODULAR) 115 void *startsym, *endsym; 116 #endif 117 118 #ifdef MODULAR 119 register_t cpu_psluserset = PSL_USERSET; 120 register_t cpu_pslusermod = PSL_USERMOD; 121 register_t cpu_pslusermask = PSL_USERMASK; 122 #endif 123 124 /* 125 * Trap vectors 126 */ 127 extern const uint32_t defaulttrap[], defaultsize; 128 extern const uint32_t sctrap[], scsize; 129 extern const uint32_t accesstrap[], accesssize; 130 extern const uint32_t criticaltrap[], criticalsize; 131 extern const uint32_t tlbimiss4xx[], tlbim4size; 132 extern const uint32_t tlbdmiss4xx[], tlbdm4size; 133 extern const uint32_t pitfitwdog[], pitfitwdogsize; 134 extern const uint32_t errata51handler[], errata51size; 135 #if defined(DDB) 136 extern const uint32_t ddblow[], ddbsize; 137 #endif 138 static const struct exc_info trap_table[] = { 139 { EXC_SC, sctrap, (uintptr_t)&scsize }, 140 { EXC_ALI, accesstrap, (uintptr_t)&accesssize }, 141 { EXC_DSI, accesstrap, (uintptr_t)&accesssize }, 142 { EXC_MCHK, criticaltrap, (uintptr_t)&criticalsize }, 143 { EXC_ITMISS, tlbimiss4xx, (uintptr_t)&tlbim4size }, 144 { EXC_DTMISS, tlbdmiss4xx, (uintptr_t)&tlbdm4size }, 145 { EXC_PIT, pitfitwdog, (uintptr_t)&pitfitwdogsize }, 146 { EXC_DEBUG, criticaltrap, (uintptr_t)&criticalsize }, 147 { (EXC_DTMISS|EXC_ALI), 148 errata51handler, (uintptr_t)&errata51size }, 149 #if defined(DDB) 150 { EXC_PGM, ddblow, (uintptr_t)&ddbsize }, 151 #else 152 { EXC_PGM, accesstrap, (uintptr_t)&accesssize }, 153 #endif 154 }; 155 156 /* 157 * Install a trap vector. We cannot use memcpy because the 158 * destination may be zero. 159 */ 160 static void 161 trap_copy(const uint32_t *src, vaddr_t dest, size_t len) 162 { 163 uint32_t *dest_p = (void *)dest; 164 165 while (len > 0) { 166 *dest_p++ = *src++; 167 len -= sizeof(uint32_t); 168 } 169 } 170 171 /* 172 * ibm4xx_init: 173 */ 174 void 175 ibm4xx_init(vaddr_t startkernel, vaddr_t endkernel, void (*handler)(void)) 176 { 177 /* Initialize cache info for memcpy, etc. */ 178 cpu_probe_cache(); 179 180 /* 181 * Initialize current pcb and pmap pointers. 182 */ 183 KASSERT(curcpu() == &cpu_info[0]); 184 KASSERT(lwp0.l_cpu == curcpu()); 185 KASSERT(curlwp == &lwp0); 186 187 curpcb = lwp_getpcb(curlwp); 188 memset(curpcb, 0, sizeof(struct pcb)); 189 190 curpcb->pcb_pm = pmap_kernel(); 191 192 for (uintptr_t exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) { 193 trap_copy(defaulttrap, exc, (uintptr_t)&defaultsize); 194 } 195 196 for (size_t i = 0; i < __arraycount(trap_table); i++) { 197 KASSERT(trap_table[i].exc_size <= 0x100); 198 trap_copy(trap_table[i].exc_addr, trap_table[i].exc_vector, 199 trap_table[i].exc_size); 200 } 201 202 __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100); 203 204 mtspr(SPR_EVPR, 0); /* Set Exception vector base */ 205 206 /* Handle trap instruction as PGM exception */ 207 mtspr(SPR_DBCR0, mfspr(SPR_DBCR0) & ~DBCR0_TDE); 208 209 /* 210 * external interrupt handler install 211 */ 212 if (handler) 213 ibm4xx_install_extint(handler); 214 215 /* 216 * Now enable translation (and machine checks/recoverable interrupts). 217 */ 218 __asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 219 : : "r"(0), "K"(PSL_IR|PSL_DR)); 220 /* XXXX PSL_ME - With ME set kernel gets stuck... */ 221 222 /* 223 * turn on console after enable translation 224 */ 225 consinit(); 226 227 uvm_md_init(); 228 229 /* 230 * Initialize pmap module. 231 */ 232 pmap_bootstrap(startkernel, endkernel); 233 234 /* 235 * Let's take all the indirect calls via our stubs and patch 236 * them to be direct calls. 237 */ 238 cpu_fixup_stubs(); 239 240 #if NKSYMS || defined(DDB) || defined(MODULAR) 241 ksyms_addsyms_elf((uintptr_t)endsym - (uintptr_t)startsym, 242 startsym, endsym); 243 #endif 244 } 245 246 void 247 ibm4xx_install_extint(void (*handler)(void)) 248 { 249 extern int extint, extsize; 250 extern u_long extint_call; 251 u_long offset = (u_long)handler - (u_long)&extint_call; 252 int msr; 253 254 #ifdef DIAGNOSTIC 255 if (offset > 0x1ffffff) 256 panic("install_extint: too far away"); 257 #endif 258 __asm volatile ("mfmsr %0; wrteei 0" : "=r"(msr)); 259 extint_call = (extint_call & 0xfc000003) | offset; 260 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize); 261 __syncicache((void *)&extint_call, sizeof extint_call); 262 __syncicache((void *)EXC_EXI, (int)&extsize); 263 __asm volatile ("mtmsr %0" :: "r"(msr)); 264 } 265 266 /* 267 * ibm4xx_cpu_startup: 268 * Machine dependent startup code. 269 */ 270 void 271 ibm4xx_cpu_startup(const char *model) 272 { 273 vaddr_t minaddr, maxaddr; 274 char pbuf[9]; 275 276 KASSERT(curcpu() != NULL); 277 KASSERT(lwp0.l_cpu != NULL); 278 KASSERT(curcpu()->ci_intstk != 0); 279 KASSERT(curcpu()->ci_idepth == -1); 280 281 /* 282 * Initialize error message buffer (at end of core). 283 */ 284 #if 0 /* For some reason this fails... --Artem 285 * Besides, do we really have to put it at the end of core? 286 * Let's use static buffer for now 287 */ 288 if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE), 289 0, UVM_KMF_VAONLY))) 290 panic("startup: no room for message buffer"); 291 for (i = 0; i < btoc(MSGBUFSIZE); i++) 292 pmap_kenter_pa(msgbuf_vaddr + i * PAGE_SIZE, 293 msgbuf_paddr + i * PAGE_SIZE, 294 VM_PROT_READ|VM_PROT_WRITE, 0); 295 initmsgbuf((void *)msgbuf_vaddr, round_page(MSGBUFSIZE)); 296 #else 297 initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE)); 298 #endif 299 300 printf("%s%s", copyright, version); 301 if (model != NULL) 302 printf("Model: %s\n", model); 303 304 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 305 printf("total memory = %s\n", pbuf); 306 307 minaddr = 0; 308 /* 309 * Allocate a submap for physio 310 */ 311 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 312 VM_PHYS_SIZE, 0, false, NULL); 313 314 /* 315 * No need to allocate an mbuf cluster submap. Mbuf clusters 316 * are allocated via the pool allocator, and we use direct-mapped 317 * pool pages. 318 */ 319 320 format_bytes(pbuf, sizeof(pbuf), ptoa(uvm_availmem(false))); 321 printf("avail memory = %s\n", pbuf); 322 } 323 324 /* 325 * ibm4xx_dumpsys: 326 * Crash dump handling. 327 */ 328 void 329 ibm4xx_dumpsys(void) 330 { 331 332 printf("dumpsys: TBD\n"); 333 } 334