arm32_machdep.c revision 1.13
1 /* $NetBSD: arm32_machdep.c,v 1.13 2002/02/20 00:10:17 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 void 159 map_pagetable(pagetable, va, pa) 160 vaddr_t pagetable; 161 vaddr_t va; 162 paddr_t pa; 163 { 164 #ifdef DIAGNOSTIC 165 if ((pa & 0xc00) != 0) 166 panic("pagetables should be group allocated on pageboundry"); 167 #endif /* DIAGNOSTIC */ 168 169 ((u_int *)pagetable)[(va >> PDSHIFT) + 0] = 170 L1_PTE((pa & PG_FRAME) + 0x000); 171 ((u_int *)pagetable)[(va >> PDSHIFT) + 1] = 172 L1_PTE((pa & PG_FRAME) + 0x400); 173 ((u_int *)pagetable)[(va >> PDSHIFT) + 2] = 174 L1_PTE((pa & PG_FRAME) + 0x800); 175 ((u_int *)pagetable)[(va >> PDSHIFT) + 3] = 176 L1_PTE((pa & PG_FRAME) + 0xc00); 177 } 178 179 /* cats kernels have a 2nd l2 pt, so the range is bigger hence the 0x7ff etc */ 180 vsize_t 181 map_chunk(pd, pt, va, pa, size, acc, flg) 182 vaddr_t pd; 183 vaddr_t pt; 184 vaddr_t va; 185 paddr_t pa; 186 vsize_t size; 187 u_int acc; 188 u_int flg; 189 { 190 pd_entry_t *l1pt = (pd_entry_t *)pd; 191 pt_entry_t *l2pt = (pt_entry_t *)pt; 192 vsize_t remain; 193 u_int loop; 194 195 remain = (size + (NBPG - 1)) & ~(NBPG - 1); 196 #ifdef VERBOSE_INIT_ARM 197 printf("map_chunk: pa=%lx va=%lx sz=%lx rem=%lx acc=%x flg=%x\n", 198 pa, va, size, remain, acc, flg); 199 printf("map_chunk: "); 200 #endif 201 size = remain; 202 203 while (remain > 0) { 204 /* Can we do a section mapping ? */ 205 if (l1pt && !((pa | va) & (L1_SEC_SIZE - 1)) 206 && remain >= L1_SEC_SIZE) { 207 #ifdef VERBOSE_INIT_ARM 208 printf("S"); 209 #endif 210 l1pt[(va >> PDSHIFT)] = L1_SECPTE(pa, acc, flg); 211 va += L1_SEC_SIZE; 212 pa += L1_SEC_SIZE; 213 remain -= L1_SEC_SIZE; 214 } else 215 /* Can we do a large page mapping ? */ 216 if (!((pa | va) & (L2_LPAGE_SIZE - 1)) 217 && (remain >= L2_LPAGE_SIZE)) { 218 #ifdef VERBOSE_INIT_ARM 219 printf("L"); 220 #endif 221 for (loop = 0; loop < 16; ++loop) 222 #ifndef cats 223 l2pt[((va >> PGSHIFT) & 0x3f0) + loop] = 224 L2_LPTE(pa, acc, flg); 225 #else 226 l2pt[((va >> PGSHIFT) & 0x7f0) + loop] = 227 L2_LPTE(pa, acc, flg); 228 #endif 229 va += L2_LPAGE_SIZE; 230 pa += L2_LPAGE_SIZE; 231 remain -= L2_LPAGE_SIZE; 232 } else 233 /* All we can do is a small page mapping */ 234 { 235 #ifdef VERBOSE_INIT_ARM 236 printf("P"); 237 #endif 238 #ifndef cats 239 l2pt[((va >> PGSHIFT) & 0x3ff)] = L2_SPTE(pa, acc, flg); 240 #else 241 l2pt[((va >> PGSHIFT) & 0x7ff)] = L2_SPTE(pa, acc, flg); 242 #endif 243 va += NBPG; 244 pa += NBPG; 245 remain -= NBPG; 246 } 247 } 248 #ifdef VERBOSE_INIT_ARM 249 printf("\n"); 250 #endif 251 return(size); 252 } 253 254 /* cats versions have larger 2 l2pt's next to each other */ 255 void 256 map_entry(pagetable, va, pa) 257 vaddr_t pagetable; 258 vaddr_t va; 259 paddr_t pa; 260 { 261 #ifndef cats 262 ((pt_entry_t *)pagetable)[((va >> PGSHIFT) & 0x000003ff)] = 263 L2_PTE((pa & PG_FRAME), AP_KRW); 264 #else 265 ((pt_entry_t *)pagetable)[((va >> PGSHIFT) & 0x000007ff)] = 266 L2_PTE((pa & PG_FRAME), AP_KRW); 267 #endif 268 } 269 270 271 void 272 map_entry_nc(pagetable, va, pa) 273 vaddr_t pagetable; 274 vaddr_t va; 275 paddr_t pa; 276 { 277 #ifndef cats 278 ((pt_entry_t *)pagetable)[((va >> PGSHIFT) & 0x000003ff)] = 279 L2_PTE_NC_NB((pa & PG_FRAME), AP_KRW); 280 #else 281 ((pt_entry_t *)pagetable)[((va >> PGSHIFT) & 0x000007ff)] = 282 L2_PTE_NC_NB((pa & PG_FRAME), AP_KRW); 283 #endif 284 } 285 286 287 void 288 map_entry_ro(pagetable, va, pa) 289 vaddr_t pagetable; 290 vaddr_t va; 291 paddr_t pa; 292 { 293 #ifndef cats 294 ((pt_entry_t *)pagetable)[((va >> PGSHIFT) & 0x000003ff)] = 295 L2_PTE((pa & PG_FRAME), AP_KR); 296 #else 297 ((pt_entry_t *)pagetable)[((va >> PGSHIFT) & 0x000007ff)] = 298 L2_PTE((pa & PG_FRAME), AP_KR); 299 #endif 300 } 301 302 303 /* 304 * void cpu_startup(void) 305 * 306 * Machine dependant startup code. 307 * 308 */ 309 310 void 311 cpu_startup() 312 { 313 int loop; 314 paddr_t minaddr; 315 paddr_t maxaddr; 316 caddr_t sysbase; 317 caddr_t size; 318 vsize_t bufsize; 319 int base, residual; 320 char pbuf[9]; 321 322 proc0paddr = (struct user *)kernelstack.pv_va; 323 proc0.p_addr = proc0paddr; 324 325 /* Set the cpu control register */ 326 cpu_setup(boot_args); 327 328 /* All domains MUST be clients, permissions are VERY important */ 329 cpu_domains(DOMAIN_CLIENT); 330 331 /* Lock down zero page */ 332 zero_page_readonly(); 333 334 /* 335 * Give pmap a chance to set up a few more things now the vm 336 * is initialised 337 */ 338 pmap_postinit(); 339 340 /* 341 * Initialize error message buffer (at end of core). 342 */ 343 344 /* msgbufphys was setup during the secondary boot strap */ 345 for (loop = 0; loop < btoc(MSGBUFSIZE); ++loop) 346 pmap_kenter_pa((vaddr_t)msgbufaddr + loop * NBPG, 347 msgbufphys + loop * NBPG, VM_PROT_READ|VM_PROT_WRITE); 348 pmap_update(pmap_kernel()); 349 initmsgbuf(msgbufaddr, round_page(MSGBUFSIZE)); 350 351 /* 352 * Identify ourselves for the msgbuf (everything printed earlier will 353 * not be buffered). 354 */ 355 printf(version); 356 357 format_bytes(pbuf, sizeof(pbuf), arm_page_to_byte(physmem)); 358 printf("total memory = %s\n", pbuf); 359 360 /* 361 * Find out how much space we need, allocate it, 362 * and then give everything true virtual addresses. 363 */ 364 size = allocsys(NULL, NULL); 365 sysbase = (caddr_t)uvm_km_zalloc(kernel_map, round_page((vaddr_t)size)); 366 if (sysbase == 0) 367 panic( 368 "cpu_startup: no room for system tables; %d bytes required", 369 (u_int)size); 370 if ((caddr_t)((allocsys(sysbase, NULL) - sysbase)) != size) 371 panic("cpu_startup: system table size inconsistency"); 372 373 /* 374 * Now allocate buffers proper. They are different than the above 375 * in that they usually occupy more virtual memory than physical. 376 */ 377 bufsize = MAXBSIZE * nbuf; 378 if (uvm_map(kernel_map, (vaddr_t *)&buffers, round_page(bufsize), 379 NULL, UVM_UNKNOWN_OFFSET, 0, 380 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 381 UVM_ADV_NORMAL, 0)) != 0) 382 panic("cpu_startup: cannot allocate UVM space for buffers"); 383 minaddr = (vaddr_t)buffers; 384 if ((bufpages / nbuf) >= btoc(MAXBSIZE)) { 385 /* don't want to alloc more physical mem than needed */ 386 bufpages = btoc(MAXBSIZE) * nbuf; 387 } 388 389 base = bufpages / nbuf; 390 residual = bufpages % nbuf; 391 for (loop = 0; loop < nbuf; ++loop) { 392 vsize_t curbufsize; 393 vaddr_t curbuf; 394 struct vm_page *pg; 395 396 /* 397 * Each buffer has MAXBSIZE bytes of VM space allocated. Of 398 * that MAXBSIZE space, we allocate and map (base+1) pages 399 * for the first "residual" buffers, and then we allocate 400 * "base" pages for the rest. 401 */ 402 curbuf = (vaddr_t) buffers + (loop * MAXBSIZE); 403 curbufsize = NBPG * ((loop < residual) ? (base+1) : base); 404 405 while (curbufsize) { 406 pg = uvm_pagealloc(NULL, 0, NULL, 0); 407 if (pg == NULL) 408 panic("cpu_startup: not enough memory for buffer cache"); 409 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 410 VM_PROT_READ|VM_PROT_WRITE); 411 curbuf += PAGE_SIZE; 412 curbufsize -= PAGE_SIZE; 413 } 414 } 415 pmap_update(pmap_kernel()); 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_un.un_32.pcb32_und_sp = (u_int)proc0.p_addr + 450 USPACE_UNDEF_STACK_TOP; 451 curpcb->pcb_un.un_32.pcb32_sp = (u_int)proc0.p_addr + 452 USPACE_SVC_STACK_TOP; 453 (void) pmap_extract(pmap_kernel(), (vaddr_t)(pmap_kernel())->pm_pdir, 454 (paddr_t *)&curpcb->pcb_pagedir); 455 456 curpcb->pcb_tf = (struct trapframe *)curpcb->pcb_un.un_32.pcb32_sp - 1; 457 } 458 459 /* 460 * Modify the current mapping for zero page to make it read only 461 * 462 * This routine is only used until things start forking. Then new 463 * system pages are mapped read only in pmap_enter(). 464 */ 465 466 void 467 zero_page_readonly() 468 { 469 WriteWord(PROCESS_PAGE_TBLS_BASE + 0, 470 L2_PTE((systempage.pv_pa & PG_FRAME), AP_KR)); 471 cpu_tlb_flushID_SE(0x00000000); 472 } 473 474 475 /* 476 * Modify the current mapping for zero page to make it read/write 477 * 478 * This routine is only used until things start forking. Then system 479 * pages belonging to user processes are never made writable. 480 */ 481 482 void 483 zero_page_readwrite() 484 { 485 WriteWord(PROCESS_PAGE_TBLS_BASE + 0, 486 L2_PTE((systempage.pv_pa & PG_FRAME), AP_KRW)); 487 cpu_tlb_flushID_SE(0x00000000); 488 } 489 490 491 /* 492 * machine dependent system variables. 493 */ 494 495 int 496 cpu_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 497 int *name; 498 u_int namelen; 499 void *oldp; 500 size_t *oldlenp; 501 void *newp; 502 size_t newlen; 503 struct proc *p; 504 { 505 /* all sysctl names at this level are terminal */ 506 if (namelen != 1) 507 return (ENOTDIR); /* overloaded */ 508 509 switch (name[0]) { 510 case CPU_DEBUG: 511 return(sysctl_int(oldp, oldlenp, newp, newlen, &kernel_debug)); 512 513 case CPU_BOOTED_DEVICE: 514 if (booted_device != NULL) 515 return (sysctl_rdstring(oldp, oldlenp, newp, 516 booted_device->dv_xname)); 517 return (EOPNOTSUPP); 518 519 case CPU_CONSDEV: { 520 dev_t consdev; 521 if (cn_tab != NULL) 522 consdev = cn_tab->cn_dev; 523 else 524 consdev = NODEV; 525 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 526 sizeof consdev)); 527 } 528 case CPU_BOOTED_KERNEL: { 529 if (booted_kernel != NULL && booted_kernel[0] != '\0') 530 return sysctl_rdstring(oldp, oldlenp, newp, 531 booted_kernel); 532 return (EOPNOTSUPP); 533 } 534 535 default: 536 return (EOPNOTSUPP); 537 } 538 /* NOTREACHED */ 539 } 540 541 void 542 parse_mi_bootargs(args) 543 char *args; 544 { 545 int integer; 546 547 if (get_bootconf_option(args, "single", BOOTOPT_TYPE_BOOLEAN, &integer) 548 || get_bootconf_option(args, "-s", BOOTOPT_TYPE_BOOLEAN, &integer)) 549 if (integer) 550 boothowto |= RB_SINGLE; 551 if (get_bootconf_option(args, "kdb", BOOTOPT_TYPE_BOOLEAN, &integer) 552 || get_bootconf_option(args, "-k", BOOTOPT_TYPE_BOOLEAN, &integer)) 553 if (integer) 554 boothowto |= RB_KDB; 555 if (get_bootconf_option(args, "ask", BOOTOPT_TYPE_BOOLEAN, &integer) 556 || get_bootconf_option(args, "-a", BOOTOPT_TYPE_BOOLEAN, &integer)) 557 if (integer) 558 boothowto |= RB_ASKNAME; 559 560 #ifdef PMAP_DEBUG 561 if (get_bootconf_option(args, "pmapdebug", BOOTOPT_TYPE_INT, &integer)) { 562 pmap_debug_level = integer; 563 pmap_debug(pmap_debug_level); 564 } 565 #endif /* PMAP_DEBUG */ 566 567 /* if (get_bootconf_option(args, "nbuf", BOOTOPT_TYPE_INT, &integer)) 568 bufpages = integer;*/ 569 570 #ifndef PMAP_STATIC_L1S 571 if (get_bootconf_option(args, "maxproc", BOOTOPT_TYPE_INT, &integer)) { 572 max_processes = integer; 573 if (max_processes < 16) 574 max_processes = 16; 575 /* Limit is PDSIZE * (max_processes + 1) <= 4MB */ 576 if (max_processes > 255) 577 max_processes = 255; 578 } 579 #endif /* !PMAP_STATUC_L1S */ 580 #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MINIROOTSIZE) 581 if (get_bootconf_option(args, "memorydisc", BOOTOPT_TYPE_INT, &integer) 582 || get_bootconf_option(args, "memorydisk", BOOTOPT_TYPE_INT, &integer)) { 583 memory_disc_size = integer; 584 memory_disc_size *= 1024; 585 if (memory_disc_size < 32*1024) 586 memory_disc_size = 32*1024; 587 if (memory_disc_size > 2048*1024) 588 memory_disc_size = 2048*1024; 589 } 590 #endif /* NMD && MEMORY_DISK_HOOKS && !MINIROOTSIZE */ 591 592 if (get_bootconf_option(args, "quiet", BOOTOPT_TYPE_BOOLEAN, &integer) 593 || get_bootconf_option(args, "-q", BOOTOPT_TYPE_BOOLEAN, &integer)) 594 if (integer) 595 boothowto |= AB_QUIET; 596 if (get_bootconf_option(args, "verbose", BOOTOPT_TYPE_BOOLEAN, &integer) 597 || get_bootconf_option(args, "-v", BOOTOPT_TYPE_BOOLEAN, &integer)) 598 if (integer) 599 boothowto |= AB_VERBOSE; 600 } 601 602 /* End of machdep.c */ 603
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