1 /* $NetBSD: machdep.c,v 1.20 2011/06/20 17:44:33 matt Exp $ */ 2 3 /* 4 * Copyright (c) 2006 Jachym Holecek 5 * All rights reserved. 6 * 7 * Written for DFC Design, s.r.o. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Based on Walnut and Explora. 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.20 2011/06/20 17:44:33 matt Exp $"); 38 39 #include "opt_compat_netbsd.h" 40 #include "opt_ddb.h" 41 #include "opt_ipkdb.h" 42 #include "opt_virtex.h" 43 #include "opt_kgdb.h" 44 45 #include <sys/param.h> 46 #include <sys/boot_flag.h> 47 #include <sys/buf.h> 48 #include <sys/bus.h> 49 #include <sys/device.h> 50 #include <sys/exec.h> 51 #include <sys/malloc.h> 52 #include <sys/mbuf.h> 53 #include <sys/module.h> 54 #include <sys/mount.h> 55 #include <sys/msgbuf.h> 56 #include <sys/kernel.h> 57 #include <sys/ksyms.h> 58 #include <sys/proc.h> 59 #include <sys/reboot.h> 60 #include <sys/syscallargs.h> 61 #include <sys/syslog.h> 62 #include <sys/systm.h> 63 64 #include <uvm/uvm_extern.h> 65 66 #include <dev/cons.h> 67 68 #include <machine/powerpc.h> 69 70 #include <powerpc/trap.h> 71 #include <powerpc/pcb.h> 72 73 #include <powerpc/spr.h> 74 #include <powerpc/ibm4xx/spr.h> 75 76 #include <powerpc/ibm4xx/cpu.h> 77 78 #include <evbppc/virtex/dcr.h> 79 #include <evbppc/virtex/virtex.h> 80 81 #include "ksyms.h" 82 83 #if defined(DDB) 84 #include <powerpc/db_machdep.h> 85 #include <ddb/db_extern.h> 86 #endif 87 88 #if defined(KGDB) 89 #include <sys/kgdb.h> 90 #endif 91 92 /* 93 * Global variables used here and there 94 */ 95 struct vm_map *phys_map = NULL; 96 97 /* 98 * This should probably be in autoconf! XXX 99 */ 100 char cpu_model[80]; 101 char machine[] = MACHINE; /* from <machine/param.h> */ 102 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 103 104 char bootpath[256]; 105 paddr_t msgbuf_paddr; 106 vaddr_t msgbuf_vaddr; 107 108 void initppc(vaddr_t, vaddr_t); 109 110 static void dumpsys(void); 111 112 /* BSS segment start & end. */ 113 extern char edata[], end[]; 114 115 /* One region holds all memory, the other is terminator expected by 405 pmap. */ 116 #define MEMREGIONS 2 117 struct mem_region physmemr[MEMREGIONS]; 118 struct mem_region availmemr[MEMREGIONS]; 119 120 /* Maximum TLB page size. */ 121 #define TLB_PG_SIZE (16*1024*1024) 122 123 void 124 initppc(vaddr_t startkernel, vaddr_t endkernel) 125 { 126 paddr_t addr, memsize; 127 128 /* Initialize cache info for memcpy, memset, etc. */ 129 cpu_probe_cache(); 130 131 memset(physmemr, 0, sizeof(physmemr)); /* [1].size = 0 */ 132 memset(availmemr, 0, sizeof(availmemr)); /* [1].size = 0 */ 133 134 memsize = (PHYSMEM * 1024 * 1024) & ~PGOFSET; 135 136 physmemr[0].start = 0; 137 physmemr[0].size = memsize; 138 139 availmemr[0].start = startkernel; 140 availmemr[0].size = memsize - availmemr[0].start; 141 142 /* Map kernel memory linearly. */ 143 for (addr = 0; addr < endkernel; addr += TLB_PG_SIZE) 144 ppc4xx_tlb_reserve(addr, addr, TLB_PG_SIZE, TLB_EX); 145 146 /* Give design-specific code a hint for reserved mappings. */ 147 virtex_machdep_init(roundup(memsize, TLB_PG_SIZE), TLB_PG_SIZE, 148 physmemr, availmemr); 149 150 ibm4xx_init(startkernel, endkernel, pic_ext_intr); 151 152 #ifdef DDB 153 if (boothowto & RB_KDB) 154 Debugger(); 155 #endif 156 #ifdef IPKDB 157 /* 158 * Now trap to IPKDB 159 */ 160 ipkdb_init(); 161 if (boothowto & RB_KDB) 162 ipkdb_connect(0); 163 #endif 164 #ifdef KGDB 165 /* 166 * Now trap to KGDB 167 */ 168 kgdb_connect(1); 169 #endif /* KGDB */ 170 171 /* 172 * Look for the ibm4xx modules in the right place. 173 */ 174 module_machine = module_machine_ibm4xx; 175 } 176 177 /* 178 * Machine dependent startup code. 179 */ 180 181 char msgbuf[MSGBUFSIZE]; 182 183 void 184 cpu_startup(void) 185 { 186 /* For use by propdb. */ 187 static u_int memsize = PHYSMEM * 1024 * 1024; 188 static u_int cpuspeed = CPUFREQ * 1000 * 1000; 189 prop_number_t pn; 190 191 vaddr_t minaddr, maxaddr; 192 char pbuf[9]; 193 194 curcpu()->ci_khz = cpuspeed / 1000; 195 196 /* Initialize error message buffer. */ 197 initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE)); 198 199 printf("%s%s", copyright, version); 200 201 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 202 printf("total memory = %s\n", pbuf); 203 204 minaddr = 0; 205 /* 206 * Allocate a submap for physio 207 */ 208 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 209 VM_PHYS_SIZE, 0, false, NULL); 210 211 /* 212 * No need to allocate an mbuf cluster submap. Mbuf clusters 213 * are allocated via the pool allocator, and we use direct-mapped 214 * pool pages. 215 */ 216 217 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 218 printf("avail memory = %s\n", pbuf); 219 220 /* 221 * Set up the board properties database. 222 */ 223 board_info_init(); 224 225 pn = prop_number_create_integer(memsize); 226 KASSERT(pn != NULL); 227 if (prop_dictionary_set(board_properties, "mem-size", pn) == false) 228 panic("setting mem-size"); 229 prop_object_release(pn); 230 231 pn = prop_number_create_integer(cpuspeed); 232 KASSERT(pn != NULL); 233 if (prop_dictionary_set(board_properties, "processor-frequency", 234 pn) == false) 235 panic("setting processor-frequency"); 236 prop_object_release(pn); 237 238 /* 239 * Now that we have VM, malloc()s are OK in bus_space. 240 */ 241 bus_space_mallocok(); 242 fake_mapiodev = 0; 243 } 244 245 246 static void 247 dumpsys(void) 248 { 249 printf("dumpsys: TBD\n"); 250 } 251 252 /* Hook used by 405 pmap module. */ 253 void 254 mem_regions(struct mem_region **mem, struct mem_region **avail) 255 { 256 *mem = physmemr; 257 *avail = availmemr; 258 } 259 260 /* 261 * Halt or reboot the machine after syncing/dumping according to howto. 262 */ 263 void 264 cpu_reboot(int howto, char *what) 265 { 266 static int syncing; 267 static char str[256]; 268 char *ap = str, *ap1 = ap; 269 270 boothowto = howto; 271 if (!cold && !(howto & RB_NOSYNC) && !syncing) { 272 syncing = 1; 273 vfs_shutdown(); /* sync */ 274 resettodr(); /* set wall clock */ 275 } 276 277 splhigh(); 278 279 if (!cold && (howto & RB_DUMP)) 280 dumpsys(); 281 282 doshutdownhooks(); 283 284 pmf_system_shutdown(boothowto); 285 286 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 287 /* Power off here if we know how...*/ 288 } 289 290 if (howto & RB_HALT) { 291 printf("halted\n\n"); 292 293 goto reboot; /* XXX for now... */ 294 295 #ifdef DDB 296 printf("dropping to debugger\n"); 297 while(1) 298 Debugger(); 299 #endif 300 #ifdef KGDB 301 printf("dropping to kgdb\n"); 302 while(1) 303 kgdb_connect(1); 304 #endif 305 } 306 307 printf("rebooting\n\n"); 308 if (what && *what) { 309 if (strlen(what) > sizeof str - 5) 310 printf("boot string too large, ignored\n"); 311 else { 312 strcpy(str, what); 313 ap1 = ap = str + strlen(str); 314 *ap++ = ' '; 315 } 316 } 317 *ap++ = '-'; 318 if (howto & RB_SINGLE) 319 *ap++ = 's'; 320 if (howto & RB_KDB) 321 *ap++ = 'd'; 322 *ap++ = 0; 323 if (ap[-2] == '-') 324 *ap1 = 0; 325 326 /* flush cache for msgbuf */ 327 __syncicache((void *)msgbuf_paddr, round_page(MSGBUFSIZE)); 328 329 reboot: 330 ppc4xx_reset(); 331 332 printf("ppc4xx_reset() failed!\n"); 333 #ifdef DDB 334 while(1) 335 Debugger(); 336 #endif 337 #ifdef KGDB 338 while(1) 339 kgdb_connect(1); 340 #else 341 while (1) 342 /* nothing */; 343 #endif 344 } 345