arm32_machdep.c revision 1.6
1 /* $NetBSD: arm32_machdep.c,v 1.6 2001/10/27 16:51:44 rearnsha 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), pte_cache_mode); 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_kenter_pa((vaddr_t)msgbufaddr + loop * NBPG, 350 msgbufphys + loop * NBPG, VM_PROT_READ|VM_PROT_WRITE); 351 pmap_update(pmap_kernel()); 352 initmsgbuf(msgbufaddr, round_page(MSGBUFSIZE)); 353 354 /* 355 * Identify ourselves for the msgbuf (everything printed earlier will 356 * not be buffered). 357 */ 358 printf(version); 359 360 format_bytes(pbuf, sizeof(pbuf), arm_page_to_byte(physmem)); 361 printf("total memory = %s\n", pbuf); 362 363 /* 364 * Find out how much space we need, allocate it, 365 * and then give everything true virtual addresses. 366 */ 367 size = allocsys(NULL, NULL); 368 sysbase = (caddr_t)uvm_km_zalloc(kernel_map, round_page((vaddr_t)size)); 369 if (sysbase == 0) 370 panic( 371 "cpu_startup: no room for system tables; %d bytes required", 372 (u_int)size); 373 if ((caddr_t)((allocsys(sysbase, NULL) - sysbase)) != size) 374 panic("cpu_startup: system table size inconsistency"); 375 376 /* 377 * Now allocate buffers proper. They are different than the above 378 * in that they usually occupy more virtual memory than physical. 379 */ 380 bufsize = MAXBSIZE * nbuf; 381 if (uvm_map(kernel_map, (vaddr_t *)&buffers, round_page(bufsize), 382 NULL, UVM_UNKNOWN_OFFSET, 0, 383 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 384 UVM_ADV_NORMAL, 0)) != 0) 385 panic("cpu_startup: cannot allocate UVM space for buffers"); 386 minaddr = (vaddr_t)buffers; 387 if ((bufpages / nbuf) >= btoc(MAXBSIZE)) { 388 /* don't want to alloc more physical mem than needed */ 389 bufpages = btoc(MAXBSIZE) * nbuf; 390 } 391 392 base = bufpages / nbuf; 393 residual = bufpages % nbuf; 394 for (loop = 0; loop < nbuf; ++loop) { 395 vsize_t curbufsize; 396 vaddr_t curbuf; 397 struct vm_page *pg; 398 399 /* 400 * Each buffer has MAXBSIZE bytes of VM space allocated. Of 401 * that MAXBSIZE space, we allocate and map (base+1) pages 402 * for the first "residual" buffers, and then we allocate 403 * "base" pages for the rest. 404 */ 405 curbuf = (vaddr_t) buffers + (loop * MAXBSIZE); 406 curbufsize = NBPG * ((loop < residual) ? (base+1) : base); 407 408 while (curbufsize) { 409 pg = uvm_pagealloc(NULL, 0, NULL, 0); 410 if (pg == NULL) 411 panic("cpu_startup: not enough memory for buffer cache"); 412 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 413 VM_PROT_READ|VM_PROT_WRITE); 414 curbuf += PAGE_SIZE; 415 curbufsize -= PAGE_SIZE; 416 } 417 } 418 pmap_update(pmap_kernel()); 419 420 /* 421 * Allocate a submap for exec arguments. This map effectively 422 * limits the number of processes exec'ing at any time. 423 */ 424 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 425 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 426 427 /* 428 * Allocate a submap for physio 429 */ 430 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 431 VM_PHYS_SIZE, 0, FALSE, NULL); 432 433 /* 434 * Finally, allocate mbuf cluster submap. 435 */ 436 mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 437 nmbclusters * mclbytes, VM_MAP_INTRSAFE, 438 FALSE, NULL); 439 440 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 441 printf("avail memory = %s\n", pbuf); 442 format_bytes(pbuf, sizeof(pbuf), bufpages * NBPG); 443 printf("using %d buffers containing %s of memory\n", nbuf, pbuf); 444 445 /* 446 * Set up buffers, so they can be used to read disk labels. 447 */ 448 bufinit(); 449 450 curpcb = &proc0.p_addr->u_pcb; 451 curpcb->pcb_flags = 0; 452 curpcb->pcb_un.un_32.pcb32_und_sp = (u_int)proc0.p_addr + 453 USPACE_UNDEF_STACK_TOP; 454 curpcb->pcb_un.un_32.pcb32_sp = (u_int)proc0.p_addr + 455 USPACE_SVC_STACK_TOP; 456 (void) pmap_extract(pmap_kernel(), (vaddr_t)(pmap_kernel())->pm_pdir, 457 (paddr_t *)&curpcb->pcb_pagedir); 458 459 curpcb->pcb_tf = (struct trapframe *)curpcb->pcb_un.un_32.pcb32_sp - 1; 460 } 461 462 /* 463 * Modify the current mapping for zero page to make it read only 464 * 465 * This routine is only used until things start forking. Then new 466 * system pages are mapped read only in pmap_enter(). 467 */ 468 469 void 470 zero_page_readonly() 471 { 472 WriteWord(PROCESS_PAGE_TBLS_BASE + 0, 473 L2_PTE((systempage.pv_pa & PG_FRAME), AP_KR)); 474 cpu_tlb_flushID_SE(0x00000000); 475 } 476 477 478 /* 479 * Modify the current mapping for zero page to make it read/write 480 * 481 * This routine is only used until things start forking. Then system 482 * pages belonging to user processes are never made writable. 483 */ 484 485 void 486 zero_page_readwrite() 487 { 488 WriteWord(PROCESS_PAGE_TBLS_BASE + 0, 489 L2_PTE((systempage.pv_pa & PG_FRAME), AP_KRW)); 490 cpu_tlb_flushID_SE(0x00000000); 491 } 492 493 494 /* 495 * machine dependent system variables. 496 */ 497 498 int 499 cpu_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 500 int *name; 501 u_int namelen; 502 void *oldp; 503 size_t *oldlenp; 504 void *newp; 505 size_t newlen; 506 struct proc *p; 507 { 508 /* all sysctl names at this level are terminal */ 509 if (namelen != 1) 510 return (ENOTDIR); /* overloaded */ 511 512 switch (name[0]) { 513 case CPU_DEBUG: 514 return(sysctl_int(oldp, oldlenp, newp, newlen, &kernel_debug)); 515 516 case CPU_BOOTED_DEVICE: 517 if (booted_device != NULL) 518 return (sysctl_rdstring(oldp, oldlenp, newp, 519 booted_device->dv_xname)); 520 return (EOPNOTSUPP); 521 522 case CPU_CONSDEV: { 523 dev_t consdev; 524 if (cn_tab != NULL) 525 consdev = cn_tab->cn_dev; 526 else 527 consdev = NODEV; 528 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 529 sizeof consdev)); 530 } 531 case CPU_BOOTED_KERNEL: { 532 if (booted_kernel != NULL && booted_kernel[0] != '\0') 533 return sysctl_rdstring(oldp, oldlenp, newp, 534 booted_kernel); 535 return (EOPNOTSUPP); 536 } 537 538 default: 539 return (EOPNOTSUPP); 540 } 541 /* NOTREACHED */ 542 } 543 544 void 545 parse_mi_bootargs(args) 546 char *args; 547 { 548 int integer; 549 550 if (get_bootconf_option(args, "single", BOOTOPT_TYPE_BOOLEAN, &integer) 551 || get_bootconf_option(args, "-s", BOOTOPT_TYPE_BOOLEAN, &integer)) 552 if (integer) 553 boothowto |= RB_SINGLE; 554 if (get_bootconf_option(args, "kdb", BOOTOPT_TYPE_BOOLEAN, &integer) 555 || get_bootconf_option(args, "-k", BOOTOPT_TYPE_BOOLEAN, &integer)) 556 if (integer) 557 boothowto |= RB_KDB; 558 if (get_bootconf_option(args, "ask", BOOTOPT_TYPE_BOOLEAN, &integer) 559 || get_bootconf_option(args, "-a", BOOTOPT_TYPE_BOOLEAN, &integer)) 560 if (integer) 561 boothowto |= RB_ASKNAME; 562 563 #ifdef PMAP_DEBUG 564 if (get_bootconf_option(args, "pmapdebug", BOOTOPT_TYPE_INT, &integer)) { 565 pmap_debug_level = integer; 566 pmap_debug(pmap_debug_level); 567 } 568 #endif /* PMAP_DEBUG */ 569 570 /* if (get_bootconf_option(args, "nbuf", BOOTOPT_TYPE_INT, &integer)) 571 bufpages = integer;*/ 572 573 #ifndef PMAP_STATIC_L1S 574 if (get_bootconf_option(args, "maxproc", BOOTOPT_TYPE_INT, &integer)) { 575 max_processes = integer; 576 if (max_processes < 16) 577 max_processes = 16; 578 /* Limit is PDSIZE * (max_processes + 1) <= 4MB */ 579 if (max_processes > 255) 580 max_processes = 255; 581 } 582 #endif /* !PMAP_STATUC_L1S */ 583 #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MINIROOTSIZE) 584 if (get_bootconf_option(args, "memorydisc", BOOTOPT_TYPE_INT, &integer) 585 || get_bootconf_option(args, "memorydisk", BOOTOPT_TYPE_INT, &integer)) { 586 memory_disc_size = integer; 587 memory_disc_size *= 1024; 588 if (memory_disc_size < 32*1024) 589 memory_disc_size = 32*1024; 590 if (memory_disc_size > 2048*1024) 591 memory_disc_size = 2048*1024; 592 } 593 #endif /* NMD && MEMORY_DISK_HOOKS && !MINIROOTSIZE */ 594 595 if (get_bootconf_option(args, "quiet", BOOTOPT_TYPE_BOOLEAN, &integer) 596 || get_bootconf_option(args, "-q", BOOTOPT_TYPE_BOOLEAN, &integer)) 597 if (integer) 598 boothowto |= AB_QUIET; 599 if (get_bootconf_option(args, "verbose", BOOTOPT_TYPE_BOOLEAN, &integer) 600 || get_bootconf_option(args, "-v", BOOTOPT_TYPE_BOOLEAN, &integer)) 601 if (integer) 602 boothowto |= AB_VERBOSE; 603 } 604 605 /* End of machdep.c */ 606
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