arm32_machdep.c revision 1.9
1 /* $NetBSD: arm32_machdep.c,v 1.9 2002/01/05 22:41:46 chris 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 char *booted_kernel; 103 104 105 /* Prototypes */ 106 107 void map_section __P((vaddr_t pt, vaddr_t va, paddr_t pa, 108 int cacheable)); 109 void map_pagetable __P((vaddr_t pt, vaddr_t va, paddr_t pa)); 110 void map_entry __P((vaddr_t pt, vaddr_t va, paddr_t pa)); 111 void map_entry_nc __P((vaddr_t pt, vaddr_t va, paddr_t pa)); 112 void map_entry_ro __P((vaddr_t pt, vaddr_t va, paddr_t pa)); 113 114 u_long strtoul __P((const char *s, char **ptr, int base)); 115 void data_abort_handler __P((trapframe_t *frame)); 116 void prefetch_abort_handler __P((trapframe_t *frame)); 117 void zero_page_readonly __P((void)); 118 void zero_page_readwrite __P((void)); 119 extern void configure __P((void)); 120 121 /* 122 * Debug function just to park the CPU 123 */ 124 125 void 126 halt() 127 { 128 while (1) 129 cpu_sleep(0); 130 } 131 132 133 /* Sync the discs and unmount the filesystems */ 134 135 void 136 bootsync(void) 137 { 138 static int bootsyncdone = 0; 139 140 if (bootsyncdone) return; 141 142 bootsyncdone = 1; 143 144 /* Make sure we can still manage to do things */ 145 if (GetCPSR() & I32_bit) { 146 /* 147 * If we get here then boot has been called without RB_NOSYNC 148 * and interrupts were disabled. This means the boot() call 149 * did not come from a user process e.g. shutdown, but must 150 * have come from somewhere in the kernel. 151 */ 152 IRQenable; 153 printf("Warning IRQ's disabled during boot()\n"); 154 } 155 156 vfs_shutdown(); 157 } 158 159 /* 160 * A few functions that are used to help construct the page tables 161 * during the bootstrap process. 162 */ 163 164 void 165 map_section(pagetable, va, pa, cacheable) 166 vaddr_t pagetable; 167 vaddr_t va; 168 paddr_t pa; 169 int cacheable; 170 { 171 #ifdef DIAGNOSTIC 172 if (((va | pa) & (L1_SEC_SIZE - 1)) != 0) 173 panic("initarm: Cannot allocate 1MB section on non 1MB boundry\n"); 174 #endif /* DIAGNOSTIC */ 175 176 if (cacheable) 177 ((u_int *)pagetable)[(va >> PDSHIFT)] = 178 L1_SEC((pa & PD_MASK), pte_cache_mode); 179 else 180 ((u_int *)pagetable)[(va >> PDSHIFT)] = 181 L1_SEC((pa & PD_MASK), 0); 182 } 183 184 185 void 186 map_pagetable(pagetable, va, pa) 187 vaddr_t pagetable; 188 vaddr_t va; 189 paddr_t pa; 190 { 191 #ifdef DIAGNOSTIC 192 if ((pa & 0xc00) != 0) 193 panic("pagetables should be group allocated on pageboundry"); 194 #endif /* DIAGNOSTIC */ 195 196 ((u_int *)pagetable)[(va >> PDSHIFT) + 0] = 197 L1_PTE((pa & PG_FRAME) + 0x000); 198 ((u_int *)pagetable)[(va >> PDSHIFT) + 1] = 199 L1_PTE((pa & PG_FRAME) + 0x400); 200 ((u_int *)pagetable)[(va >> PDSHIFT) + 2] = 201 L1_PTE((pa & PG_FRAME) + 0x800); 202 ((u_int *)pagetable)[(va >> PDSHIFT) + 3] = 203 L1_PTE((pa & PG_FRAME) + 0xc00); 204 } 205 206 vsize_t 207 map_chunk(pd, pt, va, pa, size, acc, flg) 208 vaddr_t pd; 209 vaddr_t pt; 210 vaddr_t va; 211 paddr_t pa; 212 vsize_t size; 213 u_int acc; 214 u_int flg; 215 { 216 pd_entry_t *l1pt = (pd_entry_t *)pd; 217 pt_entry_t *l2pt = (pt_entry_t *)pt; 218 vsize_t remain; 219 u_int loop; 220 221 remain = (size + (NBPG - 1)) & ~(NBPG - 1); 222 #ifdef VERBOSE_INIT_ARM 223 printf("map_chunk: pa=%lx va=%lx sz=%lx rem=%lx acc=%x flg=%x\n", 224 pa, va, size, remain, acc, flg); 225 printf("map_chunk: "); 226 #endif 227 size = remain; 228 229 while (remain > 0) { 230 /* Can we do a section mapping ? */ 231 if (l1pt && !((pa | va) & (L1_SEC_SIZE - 1)) 232 && remain >= L1_SEC_SIZE) { 233 #ifdef VERBOSE_INIT_ARM 234 printf("S"); 235 #endif 236 l1pt[(va >> PDSHIFT)] = L1_SECPTE(pa, acc, flg); 237 va += L1_SEC_SIZE; 238 pa += L1_SEC_SIZE; 239 remain -= L1_SEC_SIZE; 240 } else 241 /* Can we do a large page mapping ? */ 242 if (!((pa | va) & (L2_LPAGE_SIZE - 1)) 243 && (remain >= L2_LPAGE_SIZE)) { 244 #ifdef VERBOSE_INIT_ARM 245 printf("L"); 246 #endif 247 for (loop = 0; loop < 16; ++loop) 248 l2pt[((va >> PGSHIFT) & 0x3f0) + loop] = 249 L2_LPTE(pa, acc, flg); 250 va += L2_LPAGE_SIZE; 251 pa += L2_LPAGE_SIZE; 252 remain -= L2_LPAGE_SIZE; 253 } else 254 /* All we can do is a small page mapping */ 255 { 256 #ifdef VERBOSE_INIT_ARM 257 printf("P"); 258 #endif 259 l2pt[((va >> PGSHIFT) & 0x3ff)] = L2_SPTE(pa, acc, flg); 260 va += NBPG; 261 pa += NBPG; 262 remain -= NBPG; 263 } 264 } 265 #ifdef VERBOSE_INIT_ARM 266 printf("\n"); 267 #endif 268 return(size); 269 } 270 271 272 void 273 map_entry(pagetable, va, pa) 274 vaddr_t pagetable; 275 vaddr_t va; 276 paddr_t pa; 277 { 278 ((pt_entry_t *)pagetable)[((va >> PGSHIFT) & 0x000003ff)] = 279 L2_PTE((pa & PG_FRAME), AP_KRW); 280 } 281 282 283 void 284 map_entry_nc(pagetable, va, pa) 285 vaddr_t pagetable; 286 vaddr_t va; 287 paddr_t pa; 288 { 289 ((pt_entry_t *)pagetable)[((va >> PGSHIFT) & 0x000003ff)] = 290 L2_PTE_NC_NB((pa & PG_FRAME), AP_KRW); 291 } 292 293 294 void 295 map_entry_ro(pagetable, va, pa) 296 vaddr_t pagetable; 297 vaddr_t va; 298 paddr_t pa; 299 { 300 ((pt_entry_t *)pagetable)[((va >> PGSHIFT) & 0x000003ff)] = 301 L2_PTE((pa & PG_FRAME), AP_KR); 302 } 303 304 305 /* 306 * void cpu_startup(void) 307 * 308 * Machine dependant startup code. 309 * 310 */ 311 312 void 313 cpu_startup() 314 { 315 int loop; 316 paddr_t minaddr; 317 paddr_t maxaddr; 318 caddr_t sysbase; 319 caddr_t size; 320 vsize_t bufsize; 321 int base, residual; 322 char pbuf[9]; 323 324 proc0paddr = (struct user *)kernelstack.pv_va; 325 proc0.p_addr = proc0paddr; 326 327 /* Set the cpu control register */ 328 cpu_setup(boot_args); 329 330 /* All domains MUST be clients, permissions are VERY important */ 331 cpu_domains(DOMAIN_CLIENT); 332 333 /* Lock down zero page */ 334 zero_page_readonly(); 335 336 /* 337 * Give pmap a chance to set up a few more things now the vm 338 * is initialised 339 */ 340 pmap_postinit(); 341 342 /* 343 * Initialize error message buffer (at end of core). 344 */ 345 346 /* msgbufphys was setup during the secondary boot strap */ 347 for (loop = 0; loop < btoc(MSGBUFSIZE); ++loop) 348 pmap_kenter_pa((vaddr_t)msgbufaddr + loop * NBPG, 349 msgbufphys + loop * NBPG, VM_PROT_READ|VM_PROT_WRITE); 350 pmap_update(pmap_kernel()); 351 initmsgbuf(msgbufaddr, round_page(MSGBUFSIZE)); 352 353 /* 354 * Identify ourselves for the msgbuf (everything printed earlier will 355 * not be buffered). 356 */ 357 printf(version); 358 359 format_bytes(pbuf, sizeof(pbuf), arm_page_to_byte(physmem)); 360 printf("total memory = %s\n", pbuf); 361 362 /* 363 * Find out how much space we need, allocate it, 364 * and then give everything true virtual addresses. 365 */ 366 size = allocsys(NULL, NULL); 367 sysbase = (caddr_t)uvm_km_zalloc(kernel_map, round_page((vaddr_t)size)); 368 if (sysbase == 0) 369 panic( 370 "cpu_startup: no room for system tables; %d bytes required", 371 (u_int)size); 372 if ((caddr_t)((allocsys(sysbase, NULL) - sysbase)) != size) 373 panic("cpu_startup: system table size inconsistency"); 374 375 /* 376 * Now allocate buffers proper. They are different than the above 377 * in that they usually occupy more virtual memory than physical. 378 */ 379 bufsize = MAXBSIZE * nbuf; 380 if (uvm_map(kernel_map, (vaddr_t *)&buffers, round_page(bufsize), 381 NULL, UVM_UNKNOWN_OFFSET, 0, 382 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 383 UVM_ADV_NORMAL, 0)) != 0) 384 panic("cpu_startup: cannot allocate UVM space for buffers"); 385 minaddr = (vaddr_t)buffers; 386 if ((bufpages / nbuf) >= btoc(MAXBSIZE)) { 387 /* don't want to alloc more physical mem than needed */ 388 bufpages = btoc(MAXBSIZE) * nbuf; 389 } 390 391 base = bufpages / nbuf; 392 residual = bufpages % nbuf; 393 for (loop = 0; loop < nbuf; ++loop) { 394 vsize_t curbufsize; 395 vaddr_t curbuf; 396 struct vm_page *pg; 397 398 /* 399 * Each buffer has MAXBSIZE bytes of VM space allocated. Of 400 * that MAXBSIZE space, we allocate and map (base+1) pages 401 * for the first "residual" buffers, and then we allocate 402 * "base" pages for the rest. 403 */ 404 curbuf = (vaddr_t) buffers + (loop * MAXBSIZE); 405 curbufsize = NBPG * ((loop < residual) ? (base+1) : base); 406 407 while (curbufsize) { 408 pg = uvm_pagealloc(NULL, 0, NULL, 0); 409 if (pg == NULL) 410 panic("cpu_startup: not enough memory for buffer cache"); 411 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 412 VM_PROT_READ|VM_PROT_WRITE); 413 curbuf += PAGE_SIZE; 414 curbufsize -= PAGE_SIZE; 415 } 416 } 417 pmap_update(pmap_kernel()); 418 419 /* 420 * Allocate a submap for exec arguments. This map effectively 421 * limits the number of processes exec'ing at any time. 422 */ 423 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 424 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 425 426 /* 427 * Allocate a submap for physio 428 */ 429 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 430 VM_PHYS_SIZE, 0, FALSE, NULL); 431 432 /* 433 * Finally, allocate mbuf cluster submap. 434 */ 435 mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 436 nmbclusters * mclbytes, VM_MAP_INTRSAFE, 437 FALSE, NULL); 438 439 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 440 printf("avail memory = %s\n", pbuf); 441 format_bytes(pbuf, sizeof(pbuf), bufpages * NBPG); 442 printf("using %d buffers containing %s of memory\n", nbuf, pbuf); 443 444 /* 445 * Set up buffers, so they can be used to read disk labels. 446 */ 447 bufinit(); 448 449 curpcb = &proc0.p_addr->u_pcb; 450 curpcb->pcb_flags = 0; 451 curpcb->pcb_un.un_32.pcb32_und_sp = (u_int)proc0.p_addr + 452 USPACE_UNDEF_STACK_TOP; 453 curpcb->pcb_un.un_32.pcb32_sp = (u_int)proc0.p_addr + 454 USPACE_SVC_STACK_TOP; 455 (void) pmap_extract(pmap_kernel(), (vaddr_t)(pmap_kernel())->pm_pdir, 456 (paddr_t *)&curpcb->pcb_pagedir); 457 458 curpcb->pcb_tf = (struct trapframe *)curpcb->pcb_un.un_32.pcb32_sp - 1; 459 } 460 461 /* 462 * Modify the current mapping for zero page to make it read only 463 * 464 * This routine is only used until things start forking. Then new 465 * system pages are mapped read only in pmap_enter(). 466 */ 467 468 void 469 zero_page_readonly() 470 { 471 WriteWord(PROCESS_PAGE_TBLS_BASE + 0, 472 L2_PTE((systempage.pv_pa & PG_FRAME), AP_KR)); 473 cpu_tlb_flushID_SE(0x00000000); 474 } 475 476 477 /* 478 * Modify the current mapping for zero page to make it read/write 479 * 480 * This routine is only used until things start forking. Then system 481 * pages belonging to user processes are never made writable. 482 */ 483 484 void 485 zero_page_readwrite() 486 { 487 WriteWord(PROCESS_PAGE_TBLS_BASE + 0, 488 L2_PTE((systempage.pv_pa & PG_FRAME), AP_KRW)); 489 cpu_tlb_flushID_SE(0x00000000); 490 } 491 492 493 /* 494 * machine dependent system variables. 495 */ 496 497 int 498 cpu_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 499 int *name; 500 u_int namelen; 501 void *oldp; 502 size_t *oldlenp; 503 void *newp; 504 size_t newlen; 505 struct proc *p; 506 { 507 /* all sysctl names at this level are terminal */ 508 if (namelen != 1) 509 return (ENOTDIR); /* overloaded */ 510 511 switch (name[0]) { 512 case CPU_DEBUG: 513 return(sysctl_int(oldp, oldlenp, newp, newlen, &kernel_debug)); 514 515 case CPU_BOOTED_DEVICE: 516 if (booted_device != NULL) 517 return (sysctl_rdstring(oldp, oldlenp, newp, 518 booted_device->dv_xname)); 519 return (EOPNOTSUPP); 520 521 case CPU_CONSDEV: { 522 dev_t consdev; 523 if (cn_tab != NULL) 524 consdev = cn_tab->cn_dev; 525 else 526 consdev = NODEV; 527 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 528 sizeof consdev)); 529 } 530 case CPU_BOOTED_KERNEL: { 531 if (booted_kernel != NULL && booted_kernel[0] != '\0') 532 return sysctl_rdstring(oldp, oldlenp, newp, 533 booted_kernel); 534 return (EOPNOTSUPP); 535 } 536 537 default: 538 return (EOPNOTSUPP); 539 } 540 /* NOTREACHED */ 541 } 542 543 void 544 parse_mi_bootargs(args) 545 char *args; 546 { 547 int integer; 548 549 if (get_bootconf_option(args, "single", BOOTOPT_TYPE_BOOLEAN, &integer) 550 || get_bootconf_option(args, "-s", BOOTOPT_TYPE_BOOLEAN, &integer)) 551 if (integer) 552 boothowto |= RB_SINGLE; 553 if (get_bootconf_option(args, "kdb", BOOTOPT_TYPE_BOOLEAN, &integer) 554 || get_bootconf_option(args, "-k", BOOTOPT_TYPE_BOOLEAN, &integer)) 555 if (integer) 556 boothowto |= RB_KDB; 557 if (get_bootconf_option(args, "ask", BOOTOPT_TYPE_BOOLEAN, &integer) 558 || get_bootconf_option(args, "-a", BOOTOPT_TYPE_BOOLEAN, &integer)) 559 if (integer) 560 boothowto |= RB_ASKNAME; 561 562 #ifdef PMAP_DEBUG 563 if (get_bootconf_option(args, "pmapdebug", BOOTOPT_TYPE_INT, &integer)) { 564 pmap_debug_level = integer; 565 pmap_debug(pmap_debug_level); 566 } 567 #endif /* PMAP_DEBUG */ 568 569 /* if (get_bootconf_option(args, "nbuf", BOOTOPT_TYPE_INT, &integer)) 570 bufpages = integer;*/ 571 572 #ifndef PMAP_STATIC_L1S 573 if (get_bootconf_option(args, "maxproc", BOOTOPT_TYPE_INT, &integer)) { 574 max_processes = integer; 575 if (max_processes < 16) 576 max_processes = 16; 577 /* Limit is PDSIZE * (max_processes + 1) <= 4MB */ 578 if (max_processes > 255) 579 max_processes = 255; 580 } 581 #endif /* !PMAP_STATUC_L1S */ 582 #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MINIROOTSIZE) 583 if (get_bootconf_option(args, "memorydisc", BOOTOPT_TYPE_INT, &integer) 584 || get_bootconf_option(args, "memorydisk", BOOTOPT_TYPE_INT, &integer)) { 585 memory_disc_size = integer; 586 memory_disc_size *= 1024; 587 if (memory_disc_size < 32*1024) 588 memory_disc_size = 32*1024; 589 if (memory_disc_size > 2048*1024) 590 memory_disc_size = 2048*1024; 591 } 592 #endif /* NMD && MEMORY_DISK_HOOKS && !MINIROOTSIZE */ 593 594 if (get_bootconf_option(args, "quiet", BOOTOPT_TYPE_BOOLEAN, &integer) 595 || get_bootconf_option(args, "-q", BOOTOPT_TYPE_BOOLEAN, &integer)) 596 if (integer) 597 boothowto |= AB_QUIET; 598 if (get_bootconf_option(args, "verbose", BOOTOPT_TYPE_BOOLEAN, &integer) 599 || get_bootconf_option(args, "-v", BOOTOPT_TYPE_BOOLEAN, &integer)) 600 if (integer) 601 boothowto |= AB_VERBOSE; 602 } 603 604 /* End of machdep.c */ 605
Indexes created Fri Sep 26 20:09:58 GMT 2025