arm32_machdep.c revision 1.22
1 /* $NetBSD: arm32_machdep.c,v 1.22 2002/04/03 23:33:28 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1994-1998 Mark Brinicombe. 5 * Copyright (c) 1994 Brini. 6 * All rights reserved. 7 * 8 * This code is derived from software written for Brini by Mark Brinicombe 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 by Mark Brinicombe 21 * for the NetBSD Project. 22 * 4. The name of the company nor the name of the author may be used to 23 * endorse or promote products derived from this software without specific 24 * prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 27 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 28 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 29 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 30 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 31 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 32 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * Machine dependant functions for kernel setup 39 * 40 * Created : 17/09/94 41 * Updated : 18/04/01 updated for new wscons 42 */ 43 44 #include "opt_md.h" 45 #include "opt_pmap_debug.h" 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/reboot.h> 50 #include <sys/proc.h> 51 #include <sys/user.h> 52 #include <sys/kernel.h> 53 #include <sys/mbuf.h> 54 #include <sys/mount.h> 55 #include <sys/buf.h> 56 #include <sys/msgbuf.h> 57 #include <sys/device.h> 58 #include <uvm/uvm_extern.h> 59 #include <sys/sysctl.h> 60 61 #include <dev/cons.h> 62 63 #include <arm/arm32/katelib.h> 64 #include <arm/arm32/machdep.h> 65 #include <machine/bootconfig.h> 66 67 #include "opt_ipkdb.h" 68 #include "md.h" 69 70 struct vm_map *exec_map = NULL; 71 struct vm_map *mb_map = NULL; 72 struct vm_map *phys_map = NULL; 73 74 extern int physmem; 75 76 #ifndef PMAP_STATIC_L1S 77 extern int max_processes; 78 #endif /* !PMAP_STATIC_L1S */ 79 #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE) 80 extern u_int memory_disc_size; /* Memory disc size */ 81 #endif /* NMD && MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */ 82 83 pv_addr_t kernelstack; 84 85 /* the following is used externally (sysctl_hw) */ 86 char machine[] = MACHINE; /* from <machine/param.h> */ 87 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 88 89 /* Our exported CPU info; we can have only one. */ 90 struct cpu_info cpu_info_store; 91 92 caddr_t msgbufaddr; 93 extern paddr_t msgbufphys; 94 95 int kernel_debug = 0; 96 97 struct user *proc0paddr; 98 99 /* exported variable to be filled in by the bootloaders */ 100 char *booted_kernel; 101 102 103 /* Prototypes */ 104 105 u_long strtoul __P((const char *s, char **ptr, int base)); 106 void data_abort_handler __P((trapframe_t *frame)); 107 void prefetch_abort_handler __P((trapframe_t *frame)); 108 extern void configure __P((void)); 109 110 /* 111 * arm32_vector_init: 112 * 113 * Initialize the vector page, and select whether or not to 114 * relocate the vectors. 115 * 116 * NOTE: We expect the vector page to be mapped at its expected 117 * destination. 118 */ 119 void 120 arm32_vector_init(vaddr_t va, int which) 121 { 122 extern unsigned int page0[], page0_data[]; 123 unsigned int *vectors = (int *) va; 124 unsigned int *vectors_data = vectors + (page0_data - page0); 125 unsigned int ctrl; 126 int vec; 127 128 /* Make sure we have a legal vector page VA. */ 129 switch (va) { 130 case ARM_VECTORS_LOW: 131 ctrl = 0; 132 break; 133 134 case ARM_VECTORS_HIGH: 135 ctrl = CPU_CONTROL_VECRELOC; 136 break; 137 138 default: 139 panic("arm32_vector_init: invalid vector address: 0x%08lx\n", 140 va); 141 /* NOTREACHED */ 142 } 143 144 /* 145 * Loop through the vectors we're taking over, and copy the 146 * vector's insn and data word. 147 */ 148 for (vec = 0; vec < ARM_NVEC; vec++) { 149 if ((which & (1 << vec)) == 0) { 150 /* Don't want to take over this vector. */ 151 continue; 152 } 153 vectors[vec] = page0[vec]; 154 vectors_data[vec] = page0_data[vec]; 155 } 156 157 /* Now sync the vectors. */ 158 cpu_icache_sync_range(va, (ARM_NVEC * 2) * sizeof(u_int)); 159 160 vector_page = va; 161 cpu_control(CPU_CONTROL_VECRELOC, ctrl); 162 } 163 164 /* 165 * Debug function just to park the CPU 166 */ 167 168 void 169 halt() 170 { 171 while (1) 172 cpu_sleep(0); 173 } 174 175 176 /* Sync the discs and unmount the filesystems */ 177 178 void 179 bootsync(void) 180 { 181 static int bootsyncdone = 0; 182 183 if (bootsyncdone) return; 184 185 bootsyncdone = 1; 186 187 /* Make sure we can still manage to do things */ 188 if (GetCPSR() & I32_bit) { 189 /* 190 * If we get here then boot has been called without RB_NOSYNC 191 * and interrupts were disabled. This means the boot() call 192 * did not come from a user process e.g. shutdown, but must 193 * have come from somewhere in the kernel. 194 */ 195 IRQenable; 196 printf("Warning IRQ's disabled during boot()\n"); 197 } 198 199 vfs_shutdown(); 200 } 201 202 /* 203 * void cpu_startup(void) 204 * 205 * Machine dependant startup code. 206 * 207 */ 208 void 209 cpu_startup() 210 { 211 int loop; 212 paddr_t minaddr; 213 paddr_t maxaddr; 214 caddr_t sysbase; 215 caddr_t size; 216 vsize_t bufsize; 217 int base, residual; 218 char pbuf[9]; 219 220 proc0paddr = (struct user *)kernelstack.pv_va; 221 proc0.p_addr = proc0paddr; 222 223 /* Set the cpu control register */ 224 cpu_setup(boot_args); 225 226 /* All domains MUST be clients, permissions are VERY important */ 227 cpu_domains(DOMAIN_CLIENT); 228 229 /* Lock down zero page */ 230 vector_page_setprot(VM_PROT_READ); 231 232 /* 233 * Give pmap a chance to set up a few more things now the vm 234 * is initialised 235 */ 236 pmap_postinit(); 237 238 /* 239 * Initialize error message buffer (at end of core). 240 */ 241 242 /* msgbufphys was setup during the secondary boot strap */ 243 for (loop = 0; loop < btoc(MSGBUFSIZE); ++loop) 244 pmap_kenter_pa((vaddr_t)msgbufaddr + loop * NBPG, 245 msgbufphys + loop * NBPG, VM_PROT_READ|VM_PROT_WRITE); 246 pmap_update(pmap_kernel()); 247 initmsgbuf(msgbufaddr, round_page(MSGBUFSIZE)); 248 249 /* 250 * Identify ourselves for the msgbuf (everything printed earlier will 251 * not be buffered). 252 */ 253 printf(version); 254 255 format_bytes(pbuf, sizeof(pbuf), arm_ptob(physmem)); 256 printf("total memory = %s\n", pbuf); 257 258 /* 259 * Find out how much space we need, allocate it, 260 * and then give everything true virtual addresses. 261 */ 262 size = allocsys(NULL, NULL); 263 sysbase = (caddr_t)uvm_km_zalloc(kernel_map, round_page((vaddr_t)size)); 264 if (sysbase == 0) 265 panic( 266 "cpu_startup: no room for system tables; %d bytes required", 267 (u_int)size); 268 if ((caddr_t)((allocsys(sysbase, NULL) - sysbase)) != size) 269 panic("cpu_startup: system table size inconsistency"); 270 271 /* 272 * Now allocate buffers proper. They are different than the above 273 * in that they usually occupy more virtual memory than physical. 274 */ 275 bufsize = MAXBSIZE * nbuf; 276 if (uvm_map(kernel_map, (vaddr_t *)&buffers, round_page(bufsize), 277 NULL, UVM_UNKNOWN_OFFSET, 0, 278 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 279 UVM_ADV_NORMAL, 0)) != 0) 280 panic("cpu_startup: cannot allocate UVM space for buffers"); 281 minaddr = (vaddr_t)buffers; 282 if ((bufpages / nbuf) >= btoc(MAXBSIZE)) { 283 /* don't want to alloc more physical mem than needed */ 284 bufpages = btoc(MAXBSIZE) * nbuf; 285 } 286 287 base = bufpages / nbuf; 288 residual = bufpages % nbuf; 289 for (loop = 0; loop < nbuf; ++loop) { 290 vsize_t curbufsize; 291 vaddr_t curbuf; 292 struct vm_page *pg; 293 294 /* 295 * Each buffer has MAXBSIZE bytes of VM space allocated. Of 296 * that MAXBSIZE space, we allocate and map (base+1) pages 297 * for the first "residual" buffers, and then we allocate 298 * "base" pages for the rest. 299 */ 300 curbuf = (vaddr_t) buffers + (loop * MAXBSIZE); 301 curbufsize = NBPG * ((loop < residual) ? (base+1) : base); 302 303 while (curbufsize) { 304 pg = uvm_pagealloc(NULL, 0, NULL, 0); 305 if (pg == NULL) 306 panic("cpu_startup: not enough memory for buffer cache"); 307 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 308 VM_PROT_READ|VM_PROT_WRITE); 309 curbuf += PAGE_SIZE; 310 curbufsize -= PAGE_SIZE; 311 } 312 } 313 pmap_update(pmap_kernel()); 314 315 /* 316 * Allocate a submap for exec arguments. This map effectively 317 * limits the number of processes exec'ing at any time. 318 */ 319 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 320 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 321 322 /* 323 * Allocate a submap for physio 324 */ 325 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 326 VM_PHYS_SIZE, 0, FALSE, NULL); 327 328 /* 329 * Finally, allocate mbuf cluster submap. 330 */ 331 mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 332 nmbclusters * mclbytes, VM_MAP_INTRSAFE, 333 FALSE, NULL); 334 335 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 336 printf("avail memory = %s\n", pbuf); 337 format_bytes(pbuf, sizeof(pbuf), bufpages * NBPG); 338 printf("using %d buffers containing %s of memory\n", nbuf, pbuf); 339 340 /* 341 * Set up buffers, so they can be used to read disk labels. 342 */ 343 bufinit(); 344 345 curpcb = &proc0.p_addr->u_pcb; 346 curpcb->pcb_flags = 0; 347 curpcb->pcb_un.un_32.pcb32_und_sp = (u_int)proc0.p_addr + 348 USPACE_UNDEF_STACK_TOP; 349 curpcb->pcb_un.un_32.pcb32_sp = (u_int)proc0.p_addr + 350 USPACE_SVC_STACK_TOP; 351 (void) pmap_extract(pmap_kernel(), (vaddr_t)(pmap_kernel())->pm_pdir, 352 (paddr_t *)&curpcb->pcb_pagedir); 353 354 curpcb->pcb_tf = (struct trapframe *)curpcb->pcb_un.un_32.pcb32_sp - 1; 355 } 356 357 /* 358 * machine dependent system variables. 359 */ 360 361 int 362 cpu_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 363 int *name; 364 u_int namelen; 365 void *oldp; 366 size_t *oldlenp; 367 void *newp; 368 size_t newlen; 369 struct proc *p; 370 { 371 /* all sysctl names at this level are terminal */ 372 if (namelen != 1) 373 return (ENOTDIR); /* overloaded */ 374 375 switch (name[0]) { 376 case CPU_DEBUG: 377 return(sysctl_int(oldp, oldlenp, newp, newlen, &kernel_debug)); 378 379 case CPU_BOOTED_DEVICE: 380 if (booted_device != NULL) 381 return (sysctl_rdstring(oldp, oldlenp, newp, 382 booted_device->dv_xname)); 383 return (EOPNOTSUPP); 384 385 case CPU_CONSDEV: { 386 dev_t consdev; 387 if (cn_tab != NULL) 388 consdev = cn_tab->cn_dev; 389 else 390 consdev = NODEV; 391 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 392 sizeof consdev)); 393 } 394 case CPU_BOOTED_KERNEL: { 395 if (booted_kernel != NULL && booted_kernel[0] != '\0') 396 return sysctl_rdstring(oldp, oldlenp, newp, 397 booted_kernel); 398 return (EOPNOTSUPP); 399 } 400 401 default: 402 return (EOPNOTSUPP); 403 } 404 /* NOTREACHED */ 405 } 406 407 void 408 parse_mi_bootargs(args) 409 char *args; 410 { 411 int integer; 412 413 if (get_bootconf_option(args, "single", BOOTOPT_TYPE_BOOLEAN, &integer) 414 || get_bootconf_option(args, "-s", BOOTOPT_TYPE_BOOLEAN, &integer)) 415 if (integer) 416 boothowto |= RB_SINGLE; 417 if (get_bootconf_option(args, "kdb", BOOTOPT_TYPE_BOOLEAN, &integer) 418 || get_bootconf_option(args, "-k", BOOTOPT_TYPE_BOOLEAN, &integer)) 419 if (integer) 420 boothowto |= RB_KDB; 421 if (get_bootconf_option(args, "ask", BOOTOPT_TYPE_BOOLEAN, &integer) 422 || get_bootconf_option(args, "-a", BOOTOPT_TYPE_BOOLEAN, &integer)) 423 if (integer) 424 boothowto |= RB_ASKNAME; 425 426 #ifdef PMAP_DEBUG 427 if (get_bootconf_option(args, "pmapdebug", BOOTOPT_TYPE_INT, &integer)) { 428 pmap_debug_level = integer; 429 pmap_debug(pmap_debug_level); 430 } 431 #endif /* PMAP_DEBUG */ 432 433 /* if (get_bootconf_option(args, "nbuf", BOOTOPT_TYPE_INT, &integer)) 434 bufpages = integer;*/ 435 436 #ifndef PMAP_STATIC_L1S 437 if (get_bootconf_option(args, "maxproc", BOOTOPT_TYPE_INT, &integer)) { 438 max_processes = integer; 439 if (max_processes < 16) 440 max_processes = 16; 441 /* Limit is PDSIZE * (max_processes + 1) <= 4MB */ 442 if (max_processes > 255) 443 max_processes = 255; 444 } 445 #endif /* !PMAP_STATUC_L1S */ 446 #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE) 447 if (get_bootconf_option(args, "memorydisc", BOOTOPT_TYPE_INT, &integer) 448 || get_bootconf_option(args, "memorydisk", BOOTOPT_TYPE_INT, &integer)) { 449 memory_disc_size = integer; 450 memory_disc_size *= 1024; 451 if (memory_disc_size < 32*1024) 452 memory_disc_size = 32*1024; 453 if (memory_disc_size > 2048*1024) 454 memory_disc_size = 2048*1024; 455 } 456 #endif /* NMD && MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */ 457 458 if (get_bootconf_option(args, "quiet", BOOTOPT_TYPE_BOOLEAN, &integer) 459 || get_bootconf_option(args, "-q", BOOTOPT_TYPE_BOOLEAN, &integer)) 460 if (integer) 461 boothowto |= AB_QUIET; 462 if (get_bootconf_option(args, "verbose", BOOTOPT_TYPE_BOOLEAN, &integer) 463 || get_bootconf_option(args, "-v", BOOTOPT_TYPE_BOOLEAN, &integer)) 464 if (integer) 465 boothowto |= AB_VERBOSE; 466 } 467
Indexes created Mon Sep 29 15:09:53 GMT 2025