arm32_machdep.c revision 1.32
1 /* $NetBSD: arm32_machdep.c,v 1.32 2003/04/18 22:30:05 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 "md.h" 69 70 struct vm_map *exec_map = NULL; 71 struct vm_map *mb_map = NULL; 72 struct vm_map *phys_map = NULL; 73 74 extern int physmem; 75 76 #if !defined(PMAP_STATIC_L1S) && !defined(ARM32_PMAP_NEW) 77 extern int max_processes; 78 #endif /* !PMAP_STATIC_L1S */ 79 #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE) 80 extern size_t md_root_size; /* Memory disc size */ 81 #endif /* NMD && MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */ 82 83 pv_addr_t kernelstack; 84 85 /* the following is used externally (sysctl_hw) */ 86 char machine[] = MACHINE; /* from <machine/param.h> */ 87 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 88 89 /* Our exported CPU info; we can have only one. */ 90 struct cpu_info cpu_info_store; 91 92 caddr_t msgbufaddr; 93 extern paddr_t msgbufphys; 94 95 int kernel_debug = 0; 96 97 struct user *proc0paddr; 98 99 /* exported variable to be filled in by the bootloaders */ 100 char *booted_kernel; 101 102 103 /* Prototypes */ 104 105 u_long strtoul __P((const char *s, char **ptr, int base)); 106 void data_abort_handler __P((trapframe_t *frame)); 107 void prefetch_abort_handler __P((trapframe_t *frame)); 108 extern void configure __P((void)); 109 110 /* 111 * arm32_vector_init: 112 * 113 * Initialize the vector page, and select whether or not to 114 * relocate the vectors. 115 * 116 * NOTE: We expect the vector page to be mapped at its expected 117 * destination. 118 */ 119 void 120 arm32_vector_init(vaddr_t va, int which) 121 { 122 extern unsigned int page0[], page0_data[]; 123 unsigned int *vectors = (int *) va; 124 unsigned int *vectors_data = vectors + (page0_data - page0); 125 int vec; 126 127 /* 128 * Loop through the vectors we're taking over, and copy the 129 * vector's insn and data word. 130 */ 131 for (vec = 0; vec < ARM_NVEC; vec++) { 132 if ((which & (1 << vec)) == 0) { 133 /* Don't want to take over this vector. */ 134 continue; 135 } 136 vectors[vec] = page0[vec]; 137 vectors_data[vec] = page0_data[vec]; 138 } 139 140 /* Now sync the vectors. */ 141 cpu_icache_sync_range(va, (ARM_NVEC * 2) * sizeof(u_int)); 142 143 vector_page = va; 144 145 if (va == ARM_VECTORS_HIGH) { 146 /* 147 * Assume the MD caller knows what it's doing here, and 148 * really does want the vector page relocated. 149 * 150 * Note: This has to be done here (and not just in 151 * cpu_setup()) because the vector page needs to be 152 * accessible *before* cpu_startup() is called. 153 * Think ddb(9) ... 154 * 155 * NOTE: If the CPU control register is not readable, 156 * this will totally fail! We'll just assume that 157 * any system that has high vector support has a 158 * readable CPU control register, for now. If we 159 * ever encounter one that does not, we'll have to 160 * rethink this. 161 */ 162 cpu_control(CPU_CONTROL_VECRELOC, CPU_CONTROL_VECRELOC); 163 } 164 } 165 166 /* 167 * Debug function just to park the CPU 168 */ 169 170 void 171 halt() 172 { 173 while (1) 174 cpu_sleep(0); 175 } 176 177 178 /* Sync the discs and unmount the filesystems */ 179 180 void 181 bootsync(void) 182 { 183 static int bootsyncdone = 0; 184 185 if (bootsyncdone) return; 186 187 bootsyncdone = 1; 188 189 /* Make sure we can still manage to do things */ 190 if (GetCPSR() & I32_bit) { 191 /* 192 * If we get here then boot has been called without RB_NOSYNC 193 * and interrupts were disabled. This means the boot() call 194 * did not come from a user process e.g. shutdown, but must 195 * have come from somewhere in the kernel. 196 */ 197 IRQenable; 198 printf("Warning IRQ's disabled during boot()\n"); 199 } 200 201 vfs_shutdown(); 202 } 203 204 /* 205 * void cpu_startup(void) 206 * 207 * Machine dependant startup code. 208 * 209 */ 210 void 211 cpu_startup() 212 { 213 paddr_t minaddr; 214 paddr_t maxaddr; 215 caddr_t sysbase; 216 caddr_t size; 217 vsize_t bufsize; 218 u_int loop, base, residual; 219 char pbuf[9]; 220 221 #ifndef ARM32_PMAP_NEW 222 /* This has moved to initarm() */ 223 proc0paddr = (struct user *)kernelstack.pv_va; 224 lwp0.l_addr = proc0paddr; 225 #endif 226 227 /* Set the cpu control register */ 228 cpu_setup(boot_args); 229 230 #ifndef ARM32_PMAP_NEW 231 /* All domains MUST be clients, permissions are VERY important */ 232 cpu_domains(DOMAIN_CLIENT); 233 #endif 234 235 /* Lock down zero page */ 236 vector_page_setprot(VM_PROT_READ); 237 238 /* 239 * Give pmap a chance to set up a few more things now the vm 240 * is initialised 241 */ 242 pmap_postinit(); 243 244 /* 245 * Initialize error message buffer (at end of core). 246 */ 247 248 /* msgbufphys was setup during the secondary boot strap */ 249 for (loop = 0; loop < btoc(MSGBUFSIZE); ++loop) 250 pmap_kenter_pa((vaddr_t)msgbufaddr + loop * PAGE_SIZE, 251 msgbufphys + loop * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE); 252 pmap_update(pmap_kernel()); 253 initmsgbuf(msgbufaddr, round_page(MSGBUFSIZE)); 254 255 /* 256 * Identify ourselves for the msgbuf (everything printed earlier will 257 * not be buffered). 258 */ 259 printf(version); 260 261 format_bytes(pbuf, sizeof(pbuf), arm_ptob(physmem)); 262 printf("total memory = %s\n", pbuf); 263 264 /* 265 * Find out how much space we need, allocate it, 266 * and then give everything true virtual addresses. 267 */ 268 size = allocsys(NULL, NULL); 269 sysbase = (caddr_t)uvm_km_zalloc(kernel_map, round_page((vaddr_t)size)); 270 if (sysbase == 0) 271 panic( 272 "cpu_startup: no room for system tables; %d bytes required", 273 (u_int)size); 274 if ((caddr_t)((allocsys(sysbase, NULL) - sysbase)) != size) 275 panic("cpu_startup: system table size inconsistency"); 276 277 /* 278 * Now allocate buffers proper. They are different than the above 279 * in that they usually occupy more virtual memory than physical. 280 */ 281 bufsize = MAXBSIZE * nbuf; 282 if (uvm_map(kernel_map, (vaddr_t *)&buffers, round_page(bufsize), 283 NULL, UVM_UNKNOWN_OFFSET, 0, 284 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 285 UVM_ADV_NORMAL, 0)) != 0) 286 panic("cpu_startup: cannot allocate UVM space for buffers"); 287 minaddr = (vaddr_t)buffers; 288 if ((bufpages / nbuf) >= btoc(MAXBSIZE)) { 289 /* don't want to alloc more physical mem than needed */ 290 bufpages = btoc(MAXBSIZE) * nbuf; 291 } 292 293 base = bufpages / nbuf; 294 residual = bufpages % nbuf; 295 for (loop = 0; loop < nbuf; ++loop) { 296 vsize_t curbufsize; 297 vaddr_t curbuf; 298 struct vm_page *pg; 299 300 /* 301 * Each buffer has MAXBSIZE bytes of VM space allocated. Of 302 * that MAXBSIZE space, we allocate and map (base+1) pages 303 * for the first "residual" buffers, and then we allocate 304 * "base" pages for the rest. 305 */ 306 curbuf = (vaddr_t) buffers + (loop * MAXBSIZE); 307 curbufsize = PAGE_SIZE * ((loop < residual) ? (base+1) : base); 308 309 while (curbufsize) { 310 pg = uvm_pagealloc(NULL, 0, NULL, 0); 311 if (pg == NULL) 312 panic("cpu_startup: not enough memory for buffer cache"); 313 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 314 VM_PROT_READ|VM_PROT_WRITE); 315 curbuf += PAGE_SIZE; 316 curbufsize -= PAGE_SIZE; 317 } 318 } 319 pmap_update(pmap_kernel()); 320 321 /* 322 * Allocate a submap for exec arguments. This map effectively 323 * limits the number of processes exec'ing at any time. 324 */ 325 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 326 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 327 328 /* 329 * Allocate a submap for physio 330 */ 331 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 332 VM_PHYS_SIZE, 0, FALSE, NULL); 333 334 /* 335 * Finally, allocate mbuf cluster submap. 336 */ 337 mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 338 nmbclusters * mclbytes, VM_MAP_INTRSAFE, 339 FALSE, NULL); 340 341 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 342 printf("avail memory = %s\n", pbuf); 343 format_bytes(pbuf, sizeof(pbuf), bufpages * PAGE_SIZE); 344 printf("using %u buffers containing %s of memory\n", nbuf, pbuf); 345 346 /* 347 * Set up buffers, so they can be used to read disk labels. 348 */ 349 bufinit(); 350 351 curpcb = &lwp0.l_addr->u_pcb; 352 curpcb->pcb_flags = 0; 353 curpcb->pcb_un.un_32.pcb32_und_sp = (u_int)lwp0.l_addr + 354 USPACE_UNDEF_STACK_TOP; 355 curpcb->pcb_un.un_32.pcb32_sp = (u_int)lwp0.l_addr + 356 USPACE_SVC_STACK_TOP; 357 #ifndef ARM32_PMAP_NEW 358 (void) pmap_extract(pmap_kernel(), (vaddr_t)(pmap_kernel())->pm_pdir, 359 &curpcb->pcb_pagedir); 360 #else 361 pmap_set_pcb_pagedir(pmap_kernel(), curpcb); 362 #endif 363 364 curpcb->pcb_tf = (struct trapframe *)curpcb->pcb_un.un_32.pcb32_sp - 1; 365 } 366 367 /* 368 * machine dependent system variables. 369 */ 370 371 int 372 cpu_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 373 int *name; 374 u_int namelen; 375 void *oldp; 376 size_t *oldlenp; 377 void *newp; 378 size_t newlen; 379 struct proc *p; 380 { 381 /* all sysctl names at this level are terminal */ 382 if (namelen != 1) 383 return (ENOTDIR); /* overloaded */ 384 385 switch (name[0]) { 386 case CPU_DEBUG: 387 return(sysctl_int(oldp, oldlenp, newp, newlen, &kernel_debug)); 388 389 case CPU_BOOTED_DEVICE: 390 if (booted_device != NULL) 391 return (sysctl_rdstring(oldp, oldlenp, newp, 392 booted_device->dv_xname)); 393 return (EOPNOTSUPP); 394 395 case CPU_CONSDEV: { 396 dev_t consdev; 397 if (cn_tab != NULL) 398 consdev = cn_tab->cn_dev; 399 else 400 consdev = NODEV; 401 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 402 sizeof consdev)); 403 } 404 case CPU_BOOTED_KERNEL: { 405 if (booted_kernel != NULL && booted_kernel[0] != '\0') 406 return sysctl_rdstring(oldp, oldlenp, newp, 407 booted_kernel); 408 return (EOPNOTSUPP); 409 } 410 case CPU_POWERSAVE: { 411 int error, newval; 412 413 newval = cpu_do_powersave; 414 415 if (cpufuncs.cf_sleep == (void *) cpufunc_nullop) 416 error = sysctl_rdint(oldp, oldlenp, newp, newval); 417 else 418 error = sysctl_int(oldp, oldlenp, newp, newlen, 419 &newval); 420 if (error || newval == cpu_do_powersave) 421 return (error); 422 423 if (newval < 0 || newval > 1) 424 return (EINVAL); 425 426 cpu_do_powersave = newval; 427 return (0); 428 } 429 430 default: 431 return (EOPNOTSUPP); 432 } 433 /* NOTREACHED */ 434 } 435 436 void 437 parse_mi_bootargs(args) 438 char *args; 439 { 440 int integer; 441 442 if (get_bootconf_option(args, "single", BOOTOPT_TYPE_BOOLEAN, &integer) 443 || get_bootconf_option(args, "-s", BOOTOPT_TYPE_BOOLEAN, &integer)) 444 if (integer) 445 boothowto |= RB_SINGLE; 446 if (get_bootconf_option(args, "kdb", BOOTOPT_TYPE_BOOLEAN, &integer) 447 || get_bootconf_option(args, "-k", BOOTOPT_TYPE_BOOLEAN, &integer)) 448 if (integer) 449 boothowto |= RB_KDB; 450 if (get_bootconf_option(args, "ask", BOOTOPT_TYPE_BOOLEAN, &integer) 451 || get_bootconf_option(args, "-a", BOOTOPT_TYPE_BOOLEAN, &integer)) 452 if (integer) 453 boothowto |= RB_ASKNAME; 454 455 #ifdef PMAP_DEBUG 456 if (get_bootconf_option(args, "pmapdebug", BOOTOPT_TYPE_INT, &integer)) { 457 pmap_debug_level = integer; 458 pmap_debug(pmap_debug_level); 459 } 460 #endif /* PMAP_DEBUG */ 461 462 /* if (get_bootconf_option(args, "nbuf", BOOTOPT_TYPE_INT, &integer)) 463 bufpages = integer;*/ 464 465 #if !defined(PMAP_STATIC_L1S) && !defined(ARM32_PMAP_NEW) 466 if (get_bootconf_option(args, "maxproc", BOOTOPT_TYPE_INT, &integer)) { 467 max_processes = integer; 468 if (max_processes < 16) 469 max_processes = 16; 470 /* Limit is PDSIZE * (max_processes + 1) <= 4MB */ 471 if (max_processes > 255) 472 max_processes = 255; 473 } 474 #endif /* !PMAP_STATUC_L1S && !ARM32_PMAP_NEW */ 475 #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE) 476 if (get_bootconf_option(args, "memorydisc", BOOTOPT_TYPE_INT, &integer) 477 || get_bootconf_option(args, "memorydisk", BOOTOPT_TYPE_INT, &integer)) { 478 md_root_size = integer; 479 md_root_size *= 1024; 480 if (md_root_size < 32*1024) 481 md_root_size = 32*1024; 482 if (md_root_size > 2048*1024) 483 md_root_size = 2048*1024; 484 } 485 #endif /* NMD && MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */ 486 487 if (get_bootconf_option(args, "quiet", BOOTOPT_TYPE_BOOLEAN, &integer) 488 || get_bootconf_option(args, "-q", BOOTOPT_TYPE_BOOLEAN, &integer)) 489 if (integer) 490 boothowto |= AB_QUIET; 491 if (get_bootconf_option(args, "verbose", BOOTOPT_TYPE_BOOLEAN, &integer) 492 || get_bootconf_option(args, "-v", BOOTOPT_TYPE_BOOLEAN, &integer)) 493 if (integer) 494 boothowto |= AB_VERBOSE; 495 } 496
Indexes created Mon Sep 29 21:09:56 GMT 2025