1 /* $NetBSD: machdep.c,v 1.25 2020/06/11 19:20:43 ad 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 1.25 2020/06/11 19:20:43 ad Exp $"); 38 39 #include "opt_compat_netbsd.h" 40 #include "opt_ddb.h" 41 #include "opt_virtex.h" 42 #include "opt_kgdb.h" 43 44 #include <sys/param.h> 45 #include <sys/boot_flag.h> 46 #include <sys/buf.h> 47 #include <sys/bus.h> 48 #include <sys/device.h> 49 #include <sys/exec.h> 50 #include <sys/malloc.h> 51 #include <sys/mbuf.h> 52 #include <sys/module.h> 53 #include <sys/mount.h> 54 #include <sys/msgbuf.h> 55 #include <sys/kernel.h> 56 #include <sys/ksyms.h> 57 #include <sys/proc.h> 58 #include <sys/reboot.h> 59 #include <sys/syscallargs.h> 60 #include <sys/syslog.h> 61 #include <sys/systm.h> 62 63 #include <uvm/uvm_extern.h> 64 65 #include <dev/cons.h> 66 67 #include <machine/powerpc.h> 68 69 #include <powerpc/trap.h> 70 #include <powerpc/pcb.h> 71 72 #include <powerpc/spr.h> 73 #include <powerpc/ibm4xx/spr.h> 74 75 #include <powerpc/ibm4xx/cpu.h> 76 77 #include <evbppc/virtex/dcr.h> 78 #include <evbppc/virtex/virtex.h> 79 80 #include "ksyms.h" 81 82 #if defined(DDB) 83 #include <powerpc/db_machdep.h> 84 #include <ddb/db_extern.h> 85 #endif 86 87 #if defined(KGDB) 88 #include <sys/kgdb.h> 89 #endif 90 91 /* 92 * Global variables used here and there 93 */ 94 struct vm_map *phys_map = NULL; 95 96 /* 97 * This should probably be in autoconf! XXX 98 */ 99 char machine[] = MACHINE; /* from <machine/param.h> */ 100 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 101 102 char bootpath[256]; 103 vaddr_t msgbuf_vaddr; 104 105 void initppc(vaddr_t, vaddr_t); 106 107 static void dumpsys(void); 108 109 /* BSS segment start & end. */ 110 extern char edata[], end[]; 111 112 /* One region holds all memory, the other is terminator expected by 405 pmap. */ 113 #define MEMREGIONS 2 114 struct mem_region physmemr[MEMREGIONS]; 115 struct mem_region availmemr[MEMREGIONS]; 116 117 /* Maximum TLB page size. */ 118 #define TLB_PG_SIZE (16*1024*1024) 119 120 void 121 initppc(vaddr_t startkernel, vaddr_t endkernel) 122 { 123 paddr_t addr, memsize; 124 125 /* Initialize cache info for memcpy, memset, etc. */ 126 cpu_probe_cache(); 127 128 memset(physmemr, 0, sizeof(physmemr)); /* [1].size = 0 */ 129 memset(availmemr, 0, sizeof(availmemr)); /* [1].size = 0 */ 130 131 memsize = (PHYSMEM * 1024 * 1024) & ~PGOFSET; 132 133 physmemr[0].start = 0; 134 physmemr[0].size = memsize; 135 136 availmemr[0].start = startkernel; 137 availmemr[0].size = memsize - availmemr[0].start; 138 139 /* Map kernel memory linearly. */ 140 for (addr = 0; addr < endkernel; addr += TLB_PG_SIZE) 141 ppc4xx_tlb_reserve(addr, addr, TLB_PG_SIZE, TLB_EX); 142 143 /* Give design-specific code a hint for reserved mappings. */ 144 virtex_machdep_init(roundup(memsize, TLB_PG_SIZE), TLB_PG_SIZE, 145 physmemr, availmemr); 146 147 ibm4xx_init(startkernel, endkernel, pic_ext_intr); 148 149 #ifdef DDB 150 if (boothowto & RB_KDB) 151 Debugger(); 152 #endif 153 154 #ifdef KGDB 155 /* 156 * Now trap to KGDB 157 */ 158 kgdb_connect(1); 159 #endif /* KGDB */ 160 161 /* 162 * Look for the ibm4xx modules in the right place. 163 */ 164 module_machine = module_machine_ibm4xx; 165 } 166 167 /* 168 * Machine dependent startup code. 169 */ 170 171 void 172 cpu_startup(void) 173 { 174 /* For use by propdb. */ 175 static u_int memsize = PHYSMEM * 1024 * 1024; 176 static u_int cpuspeed = CPUFREQ * 1000 * 1000; 177 prop_number_t pn; 178 179 vaddr_t minaddr, maxaddr; 180 char pbuf[9]; 181 182 curcpu()->ci_khz = cpuspeed / 1000; 183 184 /* Initialize error message buffer. */ 185 initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE)); 186 187 printf("%s%s", copyright, version); 188 189 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 190 printf("total memory = %s\n", pbuf); 191 192 minaddr = 0; 193 /* 194 * Allocate a submap for physio 195 */ 196 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 197 VM_PHYS_SIZE, 0, false, NULL); 198 199 /* 200 * No need to allocate an mbuf cluster submap. Mbuf clusters 201 * are allocated via the pool allocator, and we use direct-mapped 202 * pool pages. 203 */ 204 205 format_bytes(pbuf, sizeof(pbuf), ptoa(uvm_availmem(false))); 206 printf("avail memory = %s\n", pbuf); 207 208 /* 209 * Set up the board properties database. 210 */ 211 board_info_init(); 212 213 pn = prop_number_create_integer(memsize); 214 KASSERT(pn != NULL); 215 if (prop_dictionary_set(board_properties, "mem-size", pn) == false) 216 panic("setting mem-size"); 217 prop_object_release(pn); 218 219 pn = prop_number_create_integer(cpuspeed); 220 KASSERT(pn != NULL); 221 if (prop_dictionary_set(board_properties, "processor-frequency", 222 pn) == false) 223 panic("setting processor-frequency"); 224 prop_object_release(pn); 225 226 /* 227 * Now that we have VM, malloc()s are OK in bus_space. 228 */ 229 bus_space_mallocok(); 230 fake_mapiodev = 0; 231 } 232 233 234 static void 235 dumpsys(void) 236 { 237 printf("dumpsys: TBD\n"); 238 } 239 240 /* Hook used by 405 pmap module. */ 241 void 242 mem_regions(struct mem_region **mem, struct mem_region **avail) 243 { 244 *mem = physmemr; 245 *avail = availmemr; 246 } 247 248 /* 249 * Halt or reboot the machine after syncing/dumping according to howto. 250 */ 251 void 252 cpu_reboot(int howto, char *what) 253 { 254 static int syncing; 255 static char str[256]; 256 char *ap = str, *ap1 = ap; 257 258 boothowto = howto; 259 if (!cold && !(howto & RB_NOSYNC) && !syncing) { 260 syncing = 1; 261 vfs_shutdown(); /* sync */ 262 resettodr(); /* set wall clock */ 263 } 264 265 splhigh(); 266 267 if (!cold && (howto & RB_DUMP)) 268 dumpsys(); 269 270 doshutdownhooks(); 271 272 pmf_system_shutdown(boothowto); 273 274 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 275 /* Power off here if we know how...*/ 276 } 277 278 if (howto & RB_HALT) { 279 printf("halted\n\n"); 280 281 goto reboot; /* XXX for now... */ 282 283 #ifdef DDB 284 printf("dropping to debugger\n"); 285 while(1) 286 Debugger(); 287 #endif 288 #ifdef KGDB 289 printf("dropping to kgdb\n"); 290 while(1) 291 kgdb_connect(1); 292 #endif 293 } 294 295 printf("rebooting\n\n"); 296 if (what && *what) { 297 if (strlen(what) > sizeof str - 5) 298 printf("boot string too large, ignored\n"); 299 else { 300 strcpy(str, what); 301 ap1 = ap = str + strlen(str); 302 *ap++ = ' '; 303 } 304 } 305 *ap++ = '-'; 306 if (howto & RB_SINGLE) 307 *ap++ = 's'; 308 if (howto & RB_KDB) 309 *ap++ = 'd'; 310 *ap++ = 0; 311 if (ap[-2] == '-') 312 *ap1 = 0; 313 314 /* flush cache for msgbuf */ 315 __syncicache((void *)msgbuf_paddr, round_page(MSGBUFSIZE)); 316 317 reboot: 318 ppc4xx_reset(); 319 320 printf("ppc4xx_reset() failed!\n"); 321 #ifdef DDB 322 while(1) 323 Debugger(); 324 #endif 325 #ifdef KGDB 326 while(1) 327 kgdb_connect(1); 328 #else 329 while (1) 330 /* nothing */; 331 #endif 332 } 333