arm32_machdep.c revision 1.15
1 /* $NetBSD: arm32_machdep.c,v 1.15 2002/02/20 20:41:15 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 "opt_mdsize.h" 69 #include "md.h" 70 71 struct vm_map *exec_map = NULL; 72 struct vm_map *mb_map = NULL; 73 struct vm_map *phys_map = NULL; 74 75 extern int physmem; 76 77 #ifndef PMAP_STATIC_L1S 78 extern int max_processes; 79 #endif /* !PMAP_STATIC_L1S */ 80 #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MINIROOTSIZE) 81 extern u_int memory_disc_size; /* Memory disc size */ 82 #endif /* NMD && MEMORY_DISK_HOOKS && !MINIROOTSIZE */ 83 84 pv_addr_t systempage; 85 pv_addr_t kernelstack; 86 87 /* the following is used externally (sysctl_hw) */ 88 char machine[] = MACHINE; /* from <machine/param.h> */ 89 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 90 91 /* Our exported CPU info; we can have only one. */ 92 struct cpu_info cpu_info_store; 93 94 extern pt_entry_t msgbufpte; 95 caddr_t msgbufaddr; 96 extern paddr_t msgbufphys; 97 98 int kernel_debug = 0; 99 100 struct user *proc0paddr; 101 102 /* exported variable to be filled in by the bootloaders */ 103 char *booted_kernel; 104 105 106 /* Prototypes */ 107 108 u_long strtoul __P((const char *s, char **ptr, int base)); 109 void data_abort_handler __P((trapframe_t *frame)); 110 void prefetch_abort_handler __P((trapframe_t *frame)); 111 void zero_page_readonly __P((void)); 112 void zero_page_readwrite __P((void)); 113 extern void configure __P((void)); 114 115 /* 116 * Debug function just to park the CPU 117 */ 118 119 void 120 halt() 121 { 122 while (1) 123 cpu_sleep(0); 124 } 125 126 127 /* Sync the discs and unmount the filesystems */ 128 129 void 130 bootsync(void) 131 { 132 static int bootsyncdone = 0; 133 134 if (bootsyncdone) return; 135 136 bootsyncdone = 1; 137 138 /* Make sure we can still manage to do things */ 139 if (GetCPSR() & I32_bit) { 140 /* 141 * If we get here then boot has been called without RB_NOSYNC 142 * and interrupts were disabled. This means the boot() call 143 * did not come from a user process e.g. shutdown, but must 144 * have come from somewhere in the kernel. 145 */ 146 IRQenable; 147 printf("Warning IRQ's disabled during boot()\n"); 148 } 149 150 vfs_shutdown(); 151 } 152 153 /* 154 * A few functions that are used to help construct the page tables 155 * during the bootstrap process. 156 */ 157 158 /* cats kernels have a 2nd l2 pt, so the range is bigger hence the 0x7ff etc */ 159 vsize_t 160 map_chunk(pd, pt, va, pa, size, acc, flg) 161 vaddr_t pd; 162 vaddr_t pt; 163 vaddr_t va; 164 paddr_t pa; 165 vsize_t size; 166 u_int acc; 167 u_int flg; 168 { 169 pd_entry_t *l1pt = (pd_entry_t *)pd; 170 pt_entry_t *l2pt = (pt_entry_t *)pt; 171 vsize_t remain; 172 u_int loop; 173 174 remain = (size + (NBPG - 1)) & ~(NBPG - 1); 175 #ifdef VERBOSE_INIT_ARM 176 printf("map_chunk: pa=%lx va=%lx sz=%lx rem=%lx acc=%x flg=%x\n", 177 pa, va, size, remain, acc, flg); 178 printf("map_chunk: "); 179 #endif 180 size = remain; 181 182 while (remain > 0) { 183 /* Can we do a section mapping ? */ 184 if (l1pt && !((pa | va) & (L1_SEC_SIZE - 1)) 185 && remain >= L1_SEC_SIZE) { 186 #ifdef VERBOSE_INIT_ARM 187 printf("S"); 188 #endif 189 l1pt[(va >> PDSHIFT)] = L1_SECPTE(pa, acc, flg); 190 va += L1_SEC_SIZE; 191 pa += L1_SEC_SIZE; 192 remain -= L1_SEC_SIZE; 193 } else 194 /* Can we do a large page mapping ? */ 195 if (!((pa | va) & (L2_LPAGE_SIZE - 1)) 196 && (remain >= L2_LPAGE_SIZE)) { 197 #ifdef VERBOSE_INIT_ARM 198 printf("L"); 199 #endif 200 for (loop = 0; loop < 16; ++loop) 201 #ifndef cats 202 l2pt[((va >> PGSHIFT) & 0x3f0) + loop] = 203 L2_LPTE(pa, acc, flg); 204 #else 205 l2pt[((va >> PGSHIFT) & 0x7f0) + loop] = 206 L2_LPTE(pa, acc, flg); 207 #endif 208 va += L2_LPAGE_SIZE; 209 pa += L2_LPAGE_SIZE; 210 remain -= L2_LPAGE_SIZE; 211 } else 212 /* All we can do is a small page mapping */ 213 { 214 #ifdef VERBOSE_INIT_ARM 215 printf("P"); 216 #endif 217 #ifndef cats 218 l2pt[((va >> PGSHIFT) & 0x3ff)] = L2_SPTE(pa, acc, flg); 219 #else 220 l2pt[((va >> PGSHIFT) & 0x7ff)] = L2_SPTE(pa, acc, flg); 221 #endif 222 va += NBPG; 223 pa += NBPG; 224 remain -= NBPG; 225 } 226 } 227 #ifdef VERBOSE_INIT_ARM 228 printf("\n"); 229 #endif 230 return(size); 231 } 232 233 /* 234 * void cpu_startup(void) 235 * 236 * Machine dependant startup code. 237 * 238 */ 239 240 void 241 cpu_startup() 242 { 243 int loop; 244 paddr_t minaddr; 245 paddr_t maxaddr; 246 caddr_t sysbase; 247 caddr_t size; 248 vsize_t bufsize; 249 int base, residual; 250 char pbuf[9]; 251 252 proc0paddr = (struct user *)kernelstack.pv_va; 253 proc0.p_addr = proc0paddr; 254 255 /* Set the cpu control register */ 256 cpu_setup(boot_args); 257 258 /* All domains MUST be clients, permissions are VERY important */ 259 cpu_domains(DOMAIN_CLIENT); 260 261 /* Lock down zero page */ 262 zero_page_readonly(); 263 264 /* 265 * Give pmap a chance to set up a few more things now the vm 266 * is initialised 267 */ 268 pmap_postinit(); 269 270 /* 271 * Initialize error message buffer (at end of core). 272 */ 273 274 /* msgbufphys was setup during the secondary boot strap */ 275 for (loop = 0; loop < btoc(MSGBUFSIZE); ++loop) 276 pmap_kenter_pa((vaddr_t)msgbufaddr + loop * NBPG, 277 msgbufphys + loop * NBPG, VM_PROT_READ|VM_PROT_WRITE); 278 pmap_update(pmap_kernel()); 279 initmsgbuf(msgbufaddr, round_page(MSGBUFSIZE)); 280 281 /* 282 * Identify ourselves for the msgbuf (everything printed earlier will 283 * not be buffered). 284 */ 285 printf(version); 286 287 format_bytes(pbuf, sizeof(pbuf), arm_page_to_byte(physmem)); 288 printf("total memory = %s\n", pbuf); 289 290 /* 291 * Find out how much space we need, allocate it, 292 * and then give everything true virtual addresses. 293 */ 294 size = allocsys(NULL, NULL); 295 sysbase = (caddr_t)uvm_km_zalloc(kernel_map, round_page((vaddr_t)size)); 296 if (sysbase == 0) 297 panic( 298 "cpu_startup: no room for system tables; %d bytes required", 299 (u_int)size); 300 if ((caddr_t)((allocsys(sysbase, NULL) - sysbase)) != size) 301 panic("cpu_startup: system table size inconsistency"); 302 303 /* 304 * Now allocate buffers proper. They are different than the above 305 * in that they usually occupy more virtual memory than physical. 306 */ 307 bufsize = MAXBSIZE * nbuf; 308 if (uvm_map(kernel_map, (vaddr_t *)&buffers, round_page(bufsize), 309 NULL, UVM_UNKNOWN_OFFSET, 0, 310 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 311 UVM_ADV_NORMAL, 0)) != 0) 312 panic("cpu_startup: cannot allocate UVM space for buffers"); 313 minaddr = (vaddr_t)buffers; 314 if ((bufpages / nbuf) >= btoc(MAXBSIZE)) { 315 /* don't want to alloc more physical mem than needed */ 316 bufpages = btoc(MAXBSIZE) * nbuf; 317 } 318 319 base = bufpages / nbuf; 320 residual = bufpages % nbuf; 321 for (loop = 0; loop < nbuf; ++loop) { 322 vsize_t curbufsize; 323 vaddr_t curbuf; 324 struct vm_page *pg; 325 326 /* 327 * Each buffer has MAXBSIZE bytes of VM space allocated. Of 328 * that MAXBSIZE space, we allocate and map (base+1) pages 329 * for the first "residual" buffers, and then we allocate 330 * "base" pages for the rest. 331 */ 332 curbuf = (vaddr_t) buffers + (loop * MAXBSIZE); 333 curbufsize = NBPG * ((loop < residual) ? (base+1) : base); 334 335 while (curbufsize) { 336 pg = uvm_pagealloc(NULL, 0, NULL, 0); 337 if (pg == NULL) 338 panic("cpu_startup: not enough memory for buffer cache"); 339 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 340 VM_PROT_READ|VM_PROT_WRITE); 341 curbuf += PAGE_SIZE; 342 curbufsize -= PAGE_SIZE; 343 } 344 } 345 pmap_update(pmap_kernel()); 346 347 /* 348 * Allocate a submap for exec arguments. This map effectively 349 * limits the number of processes exec'ing at any time. 350 */ 351 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 352 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 353 354 /* 355 * Allocate a submap for physio 356 */ 357 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 358 VM_PHYS_SIZE, 0, FALSE, NULL); 359 360 /* 361 * Finally, allocate mbuf cluster submap. 362 */ 363 mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 364 nmbclusters * mclbytes, VM_MAP_INTRSAFE, 365 FALSE, NULL); 366 367 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 368 printf("avail memory = %s\n", pbuf); 369 format_bytes(pbuf, sizeof(pbuf), bufpages * NBPG); 370 printf("using %d buffers containing %s of memory\n", nbuf, pbuf); 371 372 /* 373 * Set up buffers, so they can be used to read disk labels. 374 */ 375 bufinit(); 376 377 curpcb = &proc0.p_addr->u_pcb; 378 curpcb->pcb_flags = 0; 379 curpcb->pcb_un.un_32.pcb32_und_sp = (u_int)proc0.p_addr + 380 USPACE_UNDEF_STACK_TOP; 381 curpcb->pcb_un.un_32.pcb32_sp = (u_int)proc0.p_addr + 382 USPACE_SVC_STACK_TOP; 383 (void) pmap_extract(pmap_kernel(), (vaddr_t)(pmap_kernel())->pm_pdir, 384 (paddr_t *)&curpcb->pcb_pagedir); 385 386 curpcb->pcb_tf = (struct trapframe *)curpcb->pcb_un.un_32.pcb32_sp - 1; 387 } 388 389 /* 390 * Modify the current mapping for zero page to make it read only 391 * 392 * This routine is only used until things start forking. Then new 393 * system pages are mapped read only in pmap_enter(). 394 */ 395 396 void 397 zero_page_readonly() 398 { 399 WriteWord(PROCESS_PAGE_TBLS_BASE + 0, 400 L2_PTE((systempage.pv_pa & PG_FRAME), AP_KR)); 401 cpu_tlb_flushID_SE(0x00000000); 402 } 403 404 405 /* 406 * Modify the current mapping for zero page to make it read/write 407 * 408 * This routine is only used until things start forking. Then system 409 * pages belonging to user processes are never made writable. 410 */ 411 412 void 413 zero_page_readwrite() 414 { 415 WriteWord(PROCESS_PAGE_TBLS_BASE + 0, 416 L2_PTE((systempage.pv_pa & PG_FRAME), AP_KRW)); 417 cpu_tlb_flushID_SE(0x00000000); 418 } 419 420 421 /* 422 * machine dependent system variables. 423 */ 424 425 int 426 cpu_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 427 int *name; 428 u_int namelen; 429 void *oldp; 430 size_t *oldlenp; 431 void *newp; 432 size_t newlen; 433 struct proc *p; 434 { 435 /* all sysctl names at this level are terminal */ 436 if (namelen != 1) 437 return (ENOTDIR); /* overloaded */ 438 439 switch (name[0]) { 440 case CPU_DEBUG: 441 return(sysctl_int(oldp, oldlenp, newp, newlen, &kernel_debug)); 442 443 case CPU_BOOTED_DEVICE: 444 if (booted_device != NULL) 445 return (sysctl_rdstring(oldp, oldlenp, newp, 446 booted_device->dv_xname)); 447 return (EOPNOTSUPP); 448 449 case CPU_CONSDEV: { 450 dev_t consdev; 451 if (cn_tab != NULL) 452 consdev = cn_tab->cn_dev; 453 else 454 consdev = NODEV; 455 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 456 sizeof consdev)); 457 } 458 case CPU_BOOTED_KERNEL: { 459 if (booted_kernel != NULL && booted_kernel[0] != '\0') 460 return sysctl_rdstring(oldp, oldlenp, newp, 461 booted_kernel); 462 return (EOPNOTSUPP); 463 } 464 465 default: 466 return (EOPNOTSUPP); 467 } 468 /* NOTREACHED */ 469 } 470 471 void 472 parse_mi_bootargs(args) 473 char *args; 474 { 475 int integer; 476 477 if (get_bootconf_option(args, "single", BOOTOPT_TYPE_BOOLEAN, &integer) 478 || get_bootconf_option(args, "-s", BOOTOPT_TYPE_BOOLEAN, &integer)) 479 if (integer) 480 boothowto |= RB_SINGLE; 481 if (get_bootconf_option(args, "kdb", BOOTOPT_TYPE_BOOLEAN, &integer) 482 || get_bootconf_option(args, "-k", BOOTOPT_TYPE_BOOLEAN, &integer)) 483 if (integer) 484 boothowto |= RB_KDB; 485 if (get_bootconf_option(args, "ask", BOOTOPT_TYPE_BOOLEAN, &integer) 486 || get_bootconf_option(args, "-a", BOOTOPT_TYPE_BOOLEAN, &integer)) 487 if (integer) 488 boothowto |= RB_ASKNAME; 489 490 #ifdef PMAP_DEBUG 491 if (get_bootconf_option(args, "pmapdebug", BOOTOPT_TYPE_INT, &integer)) { 492 pmap_debug_level = integer; 493 pmap_debug(pmap_debug_level); 494 } 495 #endif /* PMAP_DEBUG */ 496 497 /* if (get_bootconf_option(args, "nbuf", BOOTOPT_TYPE_INT, &integer)) 498 bufpages = integer;*/ 499 500 #ifndef PMAP_STATIC_L1S 501 if (get_bootconf_option(args, "maxproc", BOOTOPT_TYPE_INT, &integer)) { 502 max_processes = integer; 503 if (max_processes < 16) 504 max_processes = 16; 505 /* Limit is PDSIZE * (max_processes + 1) <= 4MB */ 506 if (max_processes > 255) 507 max_processes = 255; 508 } 509 #endif /* !PMAP_STATUC_L1S */ 510 #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MINIROOTSIZE) 511 if (get_bootconf_option(args, "memorydisc", BOOTOPT_TYPE_INT, &integer) 512 || get_bootconf_option(args, "memorydisk", BOOTOPT_TYPE_INT, &integer)) { 513 memory_disc_size = integer; 514 memory_disc_size *= 1024; 515 if (memory_disc_size < 32*1024) 516 memory_disc_size = 32*1024; 517 if (memory_disc_size > 2048*1024) 518 memory_disc_size = 2048*1024; 519 } 520 #endif /* NMD && MEMORY_DISK_HOOKS && !MINIROOTSIZE */ 521 522 if (get_bootconf_option(args, "quiet", BOOTOPT_TYPE_BOOLEAN, &integer) 523 || get_bootconf_option(args, "-q", BOOTOPT_TYPE_BOOLEAN, &integer)) 524 if (integer) 525 boothowto |= AB_QUIET; 526 if (get_bootconf_option(args, "verbose", BOOTOPT_TYPE_BOOLEAN, &integer) 527 || get_bootconf_option(args, "-v", BOOTOPT_TYPE_BOOLEAN, &integer)) 528 if (integer) 529 boothowto |= AB_VERBOSE; 530 } 531 532 /* End of machdep.c */ 533
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