arm32_machdep.c revision 1.2
1 /* $NetBSD: arm32_machdep.c,v 1.2 2001/07/28 18:12:43 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 <machine/katelib.h> 64 #include <machine/pte.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 extern void dumpsys __P((void)); 121 122 /* 123 * Debug function just to park the CPU 124 */ 125 126 void 127 halt() 128 { 129 while (1) 130 cpu_sleep(0); 131 } 132 133 134 /* Sync the discs and unmount the filesystems */ 135 136 void 137 bootsync(void) 138 { 139 static int bootsyncdone = 0; 140 141 if (bootsyncdone) return; 142 143 bootsyncdone = 1; 144 145 /* Make sure we can still manage to do things */ 146 if (GetCPSR() & I32_bit) { 147 /* 148 * If we get here then boot has been called without RB_NOSYNC 149 * and interrupts were disabled. This means the boot() call 150 * did not come from a user process e.g. shutdown, but must 151 * have come from somewhere in the kernel. 152 */ 153 IRQenable; 154 printf("Warning IRQ's disabled during boot()\n"); 155 } 156 157 vfs_shutdown(); 158 } 159 160 /* 161 * A few functions that are used to help construct the page tables 162 * during the bootstrap process. 163 */ 164 165 void 166 map_section(pagetable, va, pa, cacheable) 167 vaddr_t pagetable; 168 vaddr_t va; 169 paddr_t pa; 170 int cacheable; 171 { 172 #ifdef DIAGNOSTIC 173 if (((va | pa) & (L1_SEC_SIZE - 1)) != 0) 174 panic("initarm: Cannot allocate 1MB section on non 1MB boundry\n"); 175 #endif /* DIAGNOSTIC */ 176 177 if (cacheable) 178 ((u_int *)pagetable)[(va >> PDSHIFT)] = 179 L1_SEC((pa & PD_MASK), PT_C); 180 else 181 ((u_int *)pagetable)[(va >> PDSHIFT)] = 182 L1_SEC((pa & PD_MASK), 0); 183 } 184 185 186 void 187 map_pagetable(pagetable, va, pa) 188 vaddr_t pagetable; 189 vaddr_t va; 190 paddr_t pa; 191 { 192 #ifdef DIAGNOSTIC 193 if ((pa & 0xc00) != 0) 194 panic("pagetables should be group allocated on pageboundry"); 195 #endif /* DIAGNOSTIC */ 196 197 ((u_int *)pagetable)[(va >> PDSHIFT) + 0] = 198 L1_PTE((pa & PG_FRAME) + 0x000); 199 ((u_int *)pagetable)[(va >> PDSHIFT) + 1] = 200 L1_PTE((pa & PG_FRAME) + 0x400); 201 ((u_int *)pagetable)[(va >> PDSHIFT) + 2] = 202 L1_PTE((pa & PG_FRAME) + 0x800); 203 ((u_int *)pagetable)[(va >> PDSHIFT) + 3] = 204 L1_PTE((pa & PG_FRAME) + 0xc00); 205 } 206 207 vsize_t 208 map_chunk(pd, pt, va, pa, size, acc, flg) 209 vaddr_t pd; 210 vaddr_t pt; 211 vaddr_t va; 212 paddr_t pa; 213 vsize_t size; 214 u_int acc; 215 u_int flg; 216 { 217 pd_entry_t *l1pt = (pd_entry_t *)pd; 218 pt_entry_t *l2pt = (pt_entry_t *)pt; 219 vsize_t remain; 220 u_int loop; 221 222 remain = (size + (NBPG - 1)) & ~(NBPG - 1); 223 #ifdef VERBOSE_INIT_ARM 224 printf("map_chunk: pa=%lx va=%lx sz=%lx rem=%lx acc=%x flg=%x\n", 225 pa, va, size, remain, acc, flg); 226 printf("map_chunk: "); 227 #endif 228 size = remain; 229 230 while (remain > 0) { 231 /* Can we do a section mapping ? */ 232 if (l1pt && !((pa | va) & (L1_SEC_SIZE - 1)) 233 && remain >= L1_SEC_SIZE) { 234 #ifdef VERBOSE_INIT_ARM 235 printf("S"); 236 #endif 237 l1pt[(va >> PDSHIFT)] = L1_SECPTE(pa, acc, flg); 238 va += L1_SEC_SIZE; 239 pa += L1_SEC_SIZE; 240 remain -= L1_SEC_SIZE; 241 } else 242 /* Can we do a large page mapping ? */ 243 if (!((pa | va) & (L2_LPAGE_SIZE - 1)) 244 && (remain >= L2_LPAGE_SIZE)) { 245 #ifdef VERBOSE_INIT_ARM 246 printf("L"); 247 #endif 248 for (loop = 0; loop < 16; ++loop) 249 l2pt[((va >> PGSHIFT) & 0x3f0) + loop] = 250 L2_LPTE(pa, acc, flg); 251 va += L2_LPAGE_SIZE; 252 pa += L2_LPAGE_SIZE; 253 remain -= L2_LPAGE_SIZE; 254 } else 255 /* All we can do is a small page mapping */ 256 { 257 #ifdef VERBOSE_INIT_ARM 258 printf("P"); 259 #endif 260 l2pt[((va >> PGSHIFT) & 0x3ff)] = L2_SPTE(pa, acc, flg); 261 va += NBPG; 262 pa += NBPG; 263 remain -= NBPG; 264 } 265 } 266 #ifdef VERBOSE_INIT_ARM 267 printf("\n"); 268 #endif 269 return(size); 270 } 271 272 273 void 274 map_entry(pagetable, va, pa) 275 vaddr_t pagetable; 276 vaddr_t va; 277 paddr_t pa; 278 { 279 ((pt_entry_t *)pagetable)[((va >> PGSHIFT) & 0x000003ff)] = 280 L2_PTE((pa & PG_FRAME), AP_KRW); 281 } 282 283 284 void 285 map_entry_nc(pagetable, va, pa) 286 vaddr_t pagetable; 287 vaddr_t va; 288 paddr_t pa; 289 { 290 ((pt_entry_t *)pagetable)[((va >> PGSHIFT) & 0x000003ff)] = 291 L2_PTE_NC_NB((pa & PG_FRAME), AP_KRW); 292 } 293 294 295 void 296 map_entry_ro(pagetable, va, pa) 297 vaddr_t pagetable; 298 vaddr_t va; 299 paddr_t pa; 300 { 301 ((pt_entry_t *)pagetable)[((va >> PGSHIFT) & 0x000003ff)] = 302 L2_PTE((pa & PG_FRAME), AP_KR); 303 } 304 305 306 /* 307 * void cpu_startup(void) 308 * 309 * Machine dependant startup code. 310 * 311 */ 312 313 void 314 cpu_startup() 315 { 316 int loop; 317 paddr_t minaddr; 318 paddr_t maxaddr; 319 caddr_t sysbase; 320 caddr_t size; 321 vsize_t bufsize; 322 int base, residual; 323 char pbuf[9]; 324 325 proc0paddr = (struct user *)kernelstack.pv_va; 326 proc0.p_addr = proc0paddr; 327 328 /* Set the cpu control register */ 329 cpu_setup(boot_args); 330 331 /* All domains MUST be clients, permissions are VERY important */ 332 cpu_domains(DOMAIN_CLIENT); 333 334 /* Lock down zero page */ 335 zero_page_readonly(); 336 337 /* 338 * Give pmap a chance to set up a few more things now the vm 339 * is initialised 340 */ 341 pmap_postinit(); 342 343 /* 344 * Initialize error message buffer (at end of core). 345 */ 346 347 /* msgbufphys was setup during the secondary boot strap */ 348 for (loop = 0; loop < btoc(MSGBUFSIZE); ++loop) 349 pmap_enter(pmap_kernel(), 350 (vaddr_t)msgbufaddr + loop * NBPG, 351 msgbufphys + loop * NBPG, VM_PROT_READ|VM_PROT_WRITE, 352 VM_PROT_READ|VM_PROT_WRITE|PMAP_WIRED); 353 pmap_update(); 354 initmsgbuf(msgbufaddr, round_page(MSGBUFSIZE)); 355 356 /* 357 * Identify ourselves for the msgbuf (everything printed earlier will 358 * not be buffered). 359 */ 360 printf(version); 361 362 format_bytes(pbuf, sizeof(pbuf), arm_page_to_byte(physmem)); 363 printf("total memory = %s\n", pbuf); 364 365 /* 366 * Find out how much space we need, allocate it, 367 * and then give everything true virtual addresses. 368 */ 369 size = allocsys(NULL, NULL); 370 sysbase = (caddr_t)uvm_km_zalloc(kernel_map, round_page((vaddr_t)size)); 371 if (sysbase == 0) 372 panic( 373 "cpu_startup: no room for system tables; %d bytes required", 374 (u_int)size); 375 if ((caddr_t)((allocsys(sysbase, NULL) - sysbase)) != size) 376 panic("cpu_startup: system table size inconsistency"); 377 378 /* 379 * Now allocate buffers proper. They are different than the above 380 * in that they usually occupy more virtual memory than physical. 381 */ 382 bufsize = MAXBSIZE * nbuf; 383 if (uvm_map(kernel_map, (vaddr_t *)&buffers, round_page(bufsize), 384 NULL, UVM_UNKNOWN_OFFSET, 0, 385 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 386 UVM_ADV_NORMAL, 0)) != 0) 387 panic("cpu_startup: cannot allocate UVM space for buffers"); 388 minaddr = (vaddr_t)buffers; 389 if ((bufpages / nbuf) >= btoc(MAXBSIZE)) { 390 /* don't want to alloc more physical mem than needed */ 391 bufpages = btoc(MAXBSIZE) * nbuf; 392 } 393 394 base = bufpages / nbuf; 395 residual = bufpages % nbuf; 396 for (loop = 0; loop < nbuf; ++loop) { 397 vsize_t curbufsize; 398 vaddr_t curbuf; 399 struct vm_page *pg; 400 401 curbuf = (vaddr_t) buffers + (loop * MAXBSIZE); 402 curbufsize = NBPG * ((loop < residual) ? (base+1) : base); 403 404 while (curbufsize) { 405 pg = uvm_pagealloc(NULL, 0, NULL, 0); 406 if (pg == NULL) 407 panic("cpu_startup: not enough memory for buffer cache"); 408 pmap_enter(kernel_map->pmap, curbuf, 409 VM_PAGE_TO_PHYS(pg), VM_PROT_READ|VM_PROT_WRITE, 410 VM_PROT_READ|VM_PROT_WRITE|PMAP_WIRED); 411 curbuf += PAGE_SIZE; 412 curbufsize -= PAGE_SIZE; 413 } 414 } 415 pmap_update(); 416 417 /* 418 * Allocate a submap for exec arguments. This map effectively 419 * limits the number of processes exec'ing at any time. 420 */ 421 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 422 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 423 424 /* 425 * Allocate a submap for physio 426 */ 427 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 428 VM_PHYS_SIZE, 0, FALSE, NULL); 429 430 /* 431 * Finally, allocate mbuf cluster submap. 432 */ 433 mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 434 nmbclusters * mclbytes, VM_MAP_INTRSAFE, 435 FALSE, NULL); 436 437 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 438 printf("avail memory = %s\n", pbuf); 439 format_bytes(pbuf, sizeof(pbuf), bufpages * NBPG); 440 printf("using %d buffers containing %s of memory\n", nbuf, pbuf); 441 442 /* 443 * Set up buffers, so they can be used to read disk labels. 444 */ 445 bufinit(); 446 447 curpcb = &proc0.p_addr->u_pcb; 448 curpcb->pcb_flags = 0; 449 curpcb->pcb_und_sp = (u_int)proc0.p_addr + USPACE_UNDEF_STACK_TOP; 450 curpcb->pcb_sp = (u_int)proc0.p_addr + USPACE_SVC_STACK_TOP; 451 (void) pmap_extract(pmap_kernel(), (vaddr_t)(pmap_kernel())->pm_pdir, 452 (paddr_t *)&curpcb->pcb_pagedir); 453 454 curpcb->pcb_tf = (struct trapframe *)curpcb->pcb_sp - 1; 455 } 456 457 /* 458 * Modify the current mapping for zero page to make it read only 459 * 460 * This routine is only used until things start forking. Then new 461 * system pages are mapped read only in pmap_enter(). 462 */ 463 464 void 465 zero_page_readonly() 466 { 467 WriteWord(PROCESS_PAGE_TBLS_BASE + 0, 468 L2_PTE((systempage.pv_pa & PG_FRAME), AP_KR)); 469 cpu_tlb_flushID_SE(0x00000000); 470 } 471 472 473 /* 474 * Modify the current mapping for zero page to make it read/write 475 * 476 * This routine is only used until things start forking. Then system 477 * pages belonging to user processes are never made writable. 478 */ 479 480 void 481 zero_page_readwrite() 482 { 483 WriteWord(PROCESS_PAGE_TBLS_BASE + 0, 484 L2_PTE((systempage.pv_pa & PG_FRAME), AP_KRW)); 485 cpu_tlb_flushID_SE(0x00000000); 486 } 487 488 489 /* 490 * machine dependent system variables. 491 */ 492 493 int 494 cpu_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 495 int *name; 496 u_int namelen; 497 void *oldp; 498 size_t *oldlenp; 499 void *newp; 500 size_t newlen; 501 struct proc *p; 502 { 503 /* all sysctl names at this level are terminal */ 504 if (namelen != 1) 505 return (ENOTDIR); /* overloaded */ 506 507 switch (name[0]) { 508 case CPU_DEBUG: 509 return(sysctl_int(oldp, oldlenp, newp, newlen, &kernel_debug)); 510 511 case CPU_BOOTED_DEVICE: 512 if (booted_device != NULL) 513 return (sysctl_rdstring(oldp, oldlenp, newp, 514 booted_device->dv_xname)); 515 return (EOPNOTSUPP); 516 517 case CPU_CONSDEV: { 518 dev_t consdev; 519 if (cn_tab != NULL) 520 consdev = cn_tab->cn_dev; 521 else 522 consdev = NODEV; 523 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 524 sizeof consdev)); 525 } 526 case CPU_BOOTED_KERNEL: { 527 if (booted_kernel != NULL && booted_kernel[0] != '\0') 528 return sysctl_rdstring(oldp, oldlenp, newp, 529 booted_kernel); 530 return (EOPNOTSUPP); 531 } 532 533 default: 534 return (EOPNOTSUPP); 535 } 536 /* NOTREACHED */ 537 } 538 539 void 540 parse_mi_bootargs(args) 541 char *args; 542 { 543 int integer; 544 545 if (get_bootconf_option(args, "single", BOOTOPT_TYPE_BOOLEAN, &integer) 546 || get_bootconf_option(args, "-s", BOOTOPT_TYPE_BOOLEAN, &integer)) 547 if (integer) 548 boothowto |= RB_SINGLE; 549 if (get_bootconf_option(args, "kdb", BOOTOPT_TYPE_BOOLEAN, &integer) 550 || get_bootconf_option(args, "-k", BOOTOPT_TYPE_BOOLEAN, &integer)) 551 if (integer) 552 boothowto |= RB_KDB; 553 if (get_bootconf_option(args, "ask", BOOTOPT_TYPE_BOOLEAN, &integer) 554 || get_bootconf_option(args, "-a", BOOTOPT_TYPE_BOOLEAN, &integer)) 555 if (integer) 556 boothowto |= RB_ASKNAME; 557 558 #ifdef PMAP_DEBUG 559 if (get_bootconf_option(args, "pmapdebug", BOOTOPT_TYPE_INT, &integer)) { 560 pmap_debug_level = integer; 561 pmap_debug(pmap_debug_level); 562 } 563 #endif /* PMAP_DEBUG */ 564 565 /* if (get_bootconf_option(args, "nbuf", BOOTOPT_TYPE_INT, &integer)) 566 bufpages = integer;*/ 567 568 #ifndef PMAP_STATIC_L1S 569 if (get_bootconf_option(args, "maxproc", BOOTOPT_TYPE_INT, &integer)) { 570 max_processes = integer; 571 if (max_processes < 16) 572 max_processes = 16; 573 /* Limit is PDSIZE * (max_processes + 1) <= 4MB */ 574 if (max_processes > 255) 575 max_processes = 255; 576 } 577 #endif /* !PMAP_STATUC_L1S */ 578 #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MINIROOTSIZE) 579 if (get_bootconf_option(args, "memorydisc", BOOTOPT_TYPE_INT, &integer) 580 || get_bootconf_option(args, "memorydisk", BOOTOPT_TYPE_INT, &integer)) { 581 memory_disc_size = integer; 582 memory_disc_size *= 1024; 583 if (memory_disc_size < 32*1024) 584 memory_disc_size = 32*1024; 585 if (memory_disc_size > 2048*1024) 586 memory_disc_size = 2048*1024; 587 } 588 #endif /* NMD && MEMORY_DISK_HOOKS && !MINIROOTSIZE */ 589 590 if (get_bootconf_option(args, "quiet", BOOTOPT_TYPE_BOOLEAN, &integer) 591 || get_bootconf_option(args, "-q", BOOTOPT_TYPE_BOOLEAN, &integer)) 592 if (integer) 593 boothowto |= AB_QUIET; 594 if (get_bootconf_option(args, "verbose", BOOTOPT_TYPE_BOOLEAN, &integer) 595 || get_bootconf_option(args, "-v", BOOTOPT_TYPE_BOOLEAN, &integer)) 596 if (integer) 597 boothowto |= AB_VERBOSE; 598 } 599 600 /* End of machdep.c */ 601
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