arm32_machdep.c revision 1.12
1 /* $NetBSD: arm32_machdep.c,v 1.12 2002/02/10 13:20:26 reinoud 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 void 159 map_section(pagetable, va, pa, cacheable) 160 vaddr_t pagetable; 161 vaddr_t va; 162 paddr_t pa; 163 int cacheable; 164 { 165 #ifdef DIAGNOSTIC 166 if (((va | pa) & (L1_SEC_SIZE - 1)) != 0) 167 panic("initarm: Cannot allocate 1MB section on non 1MB boundry\n"); 168 #endif /* DIAGNOSTIC */ 169 170 if (cacheable) 171 ((u_int *)pagetable)[(va >> PDSHIFT)] = 172 L1_SEC((pa & PD_MASK), pte_cache_mode); 173 else 174 ((u_int *)pagetable)[(va >> PDSHIFT)] = 175 L1_SEC((pa & PD_MASK), 0); 176 } 177 178 179 void 180 map_pagetable(pagetable, va, pa) 181 vaddr_t pagetable; 182 vaddr_t va; 183 paddr_t pa; 184 { 185 #ifdef DIAGNOSTIC 186 if ((pa & 0xc00) != 0) 187 panic("pagetables should be group allocated on pageboundry"); 188 #endif /* DIAGNOSTIC */ 189 190 ((u_int *)pagetable)[(va >> PDSHIFT) + 0] = 191 L1_PTE((pa & PG_FRAME) + 0x000); 192 ((u_int *)pagetable)[(va >> PDSHIFT) + 1] = 193 L1_PTE((pa & PG_FRAME) + 0x400); 194 ((u_int *)pagetable)[(va >> PDSHIFT) + 2] = 195 L1_PTE((pa & PG_FRAME) + 0x800); 196 ((u_int *)pagetable)[(va >> PDSHIFT) + 3] = 197 L1_PTE((pa & PG_FRAME) + 0xc00); 198 } 199 200 /* cats kernels have a 2nd l2 pt, so the range is bigger hence the 0x7ff etc */ 201 vsize_t 202 map_chunk(pd, pt, va, pa, size, acc, flg) 203 vaddr_t pd; 204 vaddr_t pt; 205 vaddr_t va; 206 paddr_t pa; 207 vsize_t size; 208 u_int acc; 209 u_int flg; 210 { 211 pd_entry_t *l1pt = (pd_entry_t *)pd; 212 pt_entry_t *l2pt = (pt_entry_t *)pt; 213 vsize_t remain; 214 u_int loop; 215 216 remain = (size + (NBPG - 1)) & ~(NBPG - 1); 217 #ifdef VERBOSE_INIT_ARM 218 printf("map_chunk: pa=%lx va=%lx sz=%lx rem=%lx acc=%x flg=%x\n", 219 pa, va, size, remain, acc, flg); 220 printf("map_chunk: "); 221 #endif 222 size = remain; 223 224 while (remain > 0) { 225 /* Can we do a section mapping ? */ 226 if (l1pt && !((pa | va) & (L1_SEC_SIZE - 1)) 227 && remain >= L1_SEC_SIZE) { 228 #ifdef VERBOSE_INIT_ARM 229 printf("S"); 230 #endif 231 l1pt[(va >> PDSHIFT)] = L1_SECPTE(pa, acc, flg); 232 va += L1_SEC_SIZE; 233 pa += L1_SEC_SIZE; 234 remain -= L1_SEC_SIZE; 235 } else 236 /* Can we do a large page mapping ? */ 237 if (!((pa | va) & (L2_LPAGE_SIZE - 1)) 238 && (remain >= L2_LPAGE_SIZE)) { 239 #ifdef VERBOSE_INIT_ARM 240 printf("L"); 241 #endif 242 for (loop = 0; loop < 16; ++loop) 243 #ifndef cats 244 l2pt[((va >> PGSHIFT) & 0x3f0) + loop] = 245 L2_LPTE(pa, acc, flg); 246 #else 247 l2pt[((va >> PGSHIFT) & 0x7f0) + loop] = 248 L2_LPTE(pa, acc, flg); 249 #endif 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 #ifndef cats 260 l2pt[((va >> PGSHIFT) & 0x3ff)] = L2_SPTE(pa, acc, flg); 261 #else 262 l2pt[((va >> PGSHIFT) & 0x7ff)] = L2_SPTE(pa, acc, flg); 263 #endif 264 va += NBPG; 265 pa += NBPG; 266 remain -= NBPG; 267 } 268 } 269 #ifdef VERBOSE_INIT_ARM 270 printf("\n"); 271 #endif 272 return(size); 273 } 274 275 /* cats versions have larger 2 l2pt's next to each other */ 276 void 277 map_entry(pagetable, va, pa) 278 vaddr_t pagetable; 279 vaddr_t va; 280 paddr_t pa; 281 { 282 #ifndef cats 283 ((pt_entry_t *)pagetable)[((va >> PGSHIFT) & 0x000003ff)] = 284 L2_PTE((pa & PG_FRAME), AP_KRW); 285 #else 286 ((pt_entry_t *)pagetable)[((va >> PGSHIFT) & 0x000007ff)] = 287 L2_PTE((pa & PG_FRAME), AP_KRW); 288 #endif 289 } 290 291 292 void 293 map_entry_nc(pagetable, va, pa) 294 vaddr_t pagetable; 295 vaddr_t va; 296 paddr_t pa; 297 { 298 #ifndef cats 299 ((pt_entry_t *)pagetable)[((va >> PGSHIFT) & 0x000003ff)] = 300 L2_PTE_NC_NB((pa & PG_FRAME), AP_KRW); 301 #else 302 ((pt_entry_t *)pagetable)[((va >> PGSHIFT) & 0x000007ff)] = 303 L2_PTE_NC_NB((pa & PG_FRAME), AP_KRW); 304 #endif 305 } 306 307 308 void 309 map_entry_ro(pagetable, va, pa) 310 vaddr_t pagetable; 311 vaddr_t va; 312 paddr_t pa; 313 { 314 #ifndef cats 315 ((pt_entry_t *)pagetable)[((va >> PGSHIFT) & 0x000003ff)] = 316 L2_PTE((pa & PG_FRAME), AP_KR); 317 #else 318 ((pt_entry_t *)pagetable)[((va >> PGSHIFT) & 0x000007ff)] = 319 L2_PTE((pa & PG_FRAME), AP_KR); 320 #endif 321 } 322 323 324 /* 325 * void cpu_startup(void) 326 * 327 * Machine dependant startup code. 328 * 329 */ 330 331 void 332 cpu_startup() 333 { 334 int loop; 335 paddr_t minaddr; 336 paddr_t maxaddr; 337 caddr_t sysbase; 338 caddr_t size; 339 vsize_t bufsize; 340 int base, residual; 341 char pbuf[9]; 342 343 proc0paddr = (struct user *)kernelstack.pv_va; 344 proc0.p_addr = proc0paddr; 345 346 /* Set the cpu control register */ 347 cpu_setup(boot_args); 348 349 /* All domains MUST be clients, permissions are VERY important */ 350 cpu_domains(DOMAIN_CLIENT); 351 352 /* Lock down zero page */ 353 zero_page_readonly(); 354 355 /* 356 * Give pmap a chance to set up a few more things now the vm 357 * is initialised 358 */ 359 pmap_postinit(); 360 361 /* 362 * Initialize error message buffer (at end of core). 363 */ 364 365 /* msgbufphys was setup during the secondary boot strap */ 366 for (loop = 0; loop < btoc(MSGBUFSIZE); ++loop) 367 pmap_kenter_pa((vaddr_t)msgbufaddr + loop * NBPG, 368 msgbufphys + loop * NBPG, VM_PROT_READ|VM_PROT_WRITE); 369 pmap_update(pmap_kernel()); 370 initmsgbuf(msgbufaddr, round_page(MSGBUFSIZE)); 371 372 /* 373 * Identify ourselves for the msgbuf (everything printed earlier will 374 * not be buffered). 375 */ 376 printf(version); 377 378 format_bytes(pbuf, sizeof(pbuf), arm_page_to_byte(physmem)); 379 printf("total memory = %s\n", pbuf); 380 381 /* 382 * Find out how much space we need, allocate it, 383 * and then give everything true virtual addresses. 384 */ 385 size = allocsys(NULL, NULL); 386 sysbase = (caddr_t)uvm_km_zalloc(kernel_map, round_page((vaddr_t)size)); 387 if (sysbase == 0) 388 panic( 389 "cpu_startup: no room for system tables; %d bytes required", 390 (u_int)size); 391 if ((caddr_t)((allocsys(sysbase, NULL) - sysbase)) != size) 392 panic("cpu_startup: system table size inconsistency"); 393 394 /* 395 * Now allocate buffers proper. They are different than the above 396 * in that they usually occupy more virtual memory than physical. 397 */ 398 bufsize = MAXBSIZE * nbuf; 399 if (uvm_map(kernel_map, (vaddr_t *)&buffers, round_page(bufsize), 400 NULL, UVM_UNKNOWN_OFFSET, 0, 401 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 402 UVM_ADV_NORMAL, 0)) != 0) 403 panic("cpu_startup: cannot allocate UVM space for buffers"); 404 minaddr = (vaddr_t)buffers; 405 if ((bufpages / nbuf) >= btoc(MAXBSIZE)) { 406 /* don't want to alloc more physical mem than needed */ 407 bufpages = btoc(MAXBSIZE) * nbuf; 408 } 409 410 base = bufpages / nbuf; 411 residual = bufpages % nbuf; 412 for (loop = 0; loop < nbuf; ++loop) { 413 vsize_t curbufsize; 414 vaddr_t curbuf; 415 struct vm_page *pg; 416 417 /* 418 * Each buffer has MAXBSIZE bytes of VM space allocated. Of 419 * that MAXBSIZE space, we allocate and map (base+1) pages 420 * for the first "residual" buffers, and then we allocate 421 * "base" pages for the rest. 422 */ 423 curbuf = (vaddr_t) buffers + (loop * MAXBSIZE); 424 curbufsize = NBPG * ((loop < residual) ? (base+1) : base); 425 426 while (curbufsize) { 427 pg = uvm_pagealloc(NULL, 0, NULL, 0); 428 if (pg == NULL) 429 panic("cpu_startup: not enough memory for buffer cache"); 430 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 431 VM_PROT_READ|VM_PROT_WRITE); 432 curbuf += PAGE_SIZE; 433 curbufsize -= PAGE_SIZE; 434 } 435 } 436 pmap_update(pmap_kernel()); 437 438 /* 439 * Allocate a submap for exec arguments. This map effectively 440 * limits the number of processes exec'ing at any time. 441 */ 442 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 443 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 444 445 /* 446 * Allocate a submap for physio 447 */ 448 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 449 VM_PHYS_SIZE, 0, FALSE, NULL); 450 451 /* 452 * Finally, allocate mbuf cluster submap. 453 */ 454 mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 455 nmbclusters * mclbytes, VM_MAP_INTRSAFE, 456 FALSE, NULL); 457 458 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 459 printf("avail memory = %s\n", pbuf); 460 format_bytes(pbuf, sizeof(pbuf), bufpages * NBPG); 461 printf("using %d buffers containing %s of memory\n", nbuf, pbuf); 462 463 /* 464 * Set up buffers, so they can be used to read disk labels. 465 */ 466 bufinit(); 467 468 curpcb = &proc0.p_addr->u_pcb; 469 curpcb->pcb_flags = 0; 470 curpcb->pcb_un.un_32.pcb32_und_sp = (u_int)proc0.p_addr + 471 USPACE_UNDEF_STACK_TOP; 472 curpcb->pcb_un.un_32.pcb32_sp = (u_int)proc0.p_addr + 473 USPACE_SVC_STACK_TOP; 474 (void) pmap_extract(pmap_kernel(), (vaddr_t)(pmap_kernel())->pm_pdir, 475 (paddr_t *)&curpcb->pcb_pagedir); 476 477 curpcb->pcb_tf = (struct trapframe *)curpcb->pcb_un.un_32.pcb32_sp - 1; 478 } 479 480 /* 481 * Modify the current mapping for zero page to make it read only 482 * 483 * This routine is only used until things start forking. Then new 484 * system pages are mapped read only in pmap_enter(). 485 */ 486 487 void 488 zero_page_readonly() 489 { 490 WriteWord(PROCESS_PAGE_TBLS_BASE + 0, 491 L2_PTE((systempage.pv_pa & PG_FRAME), AP_KR)); 492 cpu_tlb_flushID_SE(0x00000000); 493 } 494 495 496 /* 497 * Modify the current mapping for zero page to make it read/write 498 * 499 * This routine is only used until things start forking. Then system 500 * pages belonging to user processes are never made writable. 501 */ 502 503 void 504 zero_page_readwrite() 505 { 506 WriteWord(PROCESS_PAGE_TBLS_BASE + 0, 507 L2_PTE((systempage.pv_pa & PG_FRAME), AP_KRW)); 508 cpu_tlb_flushID_SE(0x00000000); 509 } 510 511 512 /* 513 * machine dependent system variables. 514 */ 515 516 int 517 cpu_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 518 int *name; 519 u_int namelen; 520 void *oldp; 521 size_t *oldlenp; 522 void *newp; 523 size_t newlen; 524 struct proc *p; 525 { 526 /* all sysctl names at this level are terminal */ 527 if (namelen != 1) 528 return (ENOTDIR); /* overloaded */ 529 530 switch (name[0]) { 531 case CPU_DEBUG: 532 return(sysctl_int(oldp, oldlenp, newp, newlen, &kernel_debug)); 533 534 case CPU_BOOTED_DEVICE: 535 if (booted_device != NULL) 536 return (sysctl_rdstring(oldp, oldlenp, newp, 537 booted_device->dv_xname)); 538 return (EOPNOTSUPP); 539 540 case CPU_CONSDEV: { 541 dev_t consdev; 542 if (cn_tab != NULL) 543 consdev = cn_tab->cn_dev; 544 else 545 consdev = NODEV; 546 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 547 sizeof consdev)); 548 } 549 case CPU_BOOTED_KERNEL: { 550 if (booted_kernel != NULL && booted_kernel[0] != '\0') 551 return sysctl_rdstring(oldp, oldlenp, newp, 552 booted_kernel); 553 return (EOPNOTSUPP); 554 } 555 556 default: 557 return (EOPNOTSUPP); 558 } 559 /* NOTREACHED */ 560 } 561 562 void 563 parse_mi_bootargs(args) 564 char *args; 565 { 566 int integer; 567 568 if (get_bootconf_option(args, "single", BOOTOPT_TYPE_BOOLEAN, &integer) 569 || get_bootconf_option(args, "-s", BOOTOPT_TYPE_BOOLEAN, &integer)) 570 if (integer) 571 boothowto |= RB_SINGLE; 572 if (get_bootconf_option(args, "kdb", BOOTOPT_TYPE_BOOLEAN, &integer) 573 || get_bootconf_option(args, "-k", BOOTOPT_TYPE_BOOLEAN, &integer)) 574 if (integer) 575 boothowto |= RB_KDB; 576 if (get_bootconf_option(args, "ask", BOOTOPT_TYPE_BOOLEAN, &integer) 577 || get_bootconf_option(args, "-a", BOOTOPT_TYPE_BOOLEAN, &integer)) 578 if (integer) 579 boothowto |= RB_ASKNAME; 580 581 #ifdef PMAP_DEBUG 582 if (get_bootconf_option(args, "pmapdebug", BOOTOPT_TYPE_INT, &integer)) { 583 pmap_debug_level = integer; 584 pmap_debug(pmap_debug_level); 585 } 586 #endif /* PMAP_DEBUG */ 587 588 /* if (get_bootconf_option(args, "nbuf", BOOTOPT_TYPE_INT, &integer)) 589 bufpages = integer;*/ 590 591 #ifndef PMAP_STATIC_L1S 592 if (get_bootconf_option(args, "maxproc", BOOTOPT_TYPE_INT, &integer)) { 593 max_processes = integer; 594 if (max_processes < 16) 595 max_processes = 16; 596 /* Limit is PDSIZE * (max_processes + 1) <= 4MB */ 597 if (max_processes > 255) 598 max_processes = 255; 599 } 600 #endif /* !PMAP_STATUC_L1S */ 601 #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MINIROOTSIZE) 602 if (get_bootconf_option(args, "memorydisc", BOOTOPT_TYPE_INT, &integer) 603 || get_bootconf_option(args, "memorydisk", BOOTOPT_TYPE_INT, &integer)) { 604 memory_disc_size = integer; 605 memory_disc_size *= 1024; 606 if (memory_disc_size < 32*1024) 607 memory_disc_size = 32*1024; 608 if (memory_disc_size > 2048*1024) 609 memory_disc_size = 2048*1024; 610 } 611 #endif /* NMD && MEMORY_DISK_HOOKS && !MINIROOTSIZE */ 612 613 if (get_bootconf_option(args, "quiet", BOOTOPT_TYPE_BOOLEAN, &integer) 614 || get_bootconf_option(args, "-q", BOOTOPT_TYPE_BOOLEAN, &integer)) 615 if (integer) 616 boothowto |= AB_QUIET; 617 if (get_bootconf_option(args, "verbose", BOOTOPT_TYPE_BOOLEAN, &integer) 618 || get_bootconf_option(args, "-v", BOOTOPT_TYPE_BOOLEAN, &integer)) 619 if (integer) 620 boothowto |= AB_VERBOSE; 621 } 622 623 /* End of machdep.c */ 624
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