arm32_machdep.c revision 1.31
1 /* $NetBSD: arm32_machdep.c,v 1.31 2003/04/18 11:08:24 scw 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 cpu_control(CPU_CONTROL_VECRELOC, CPU_CONTROL_VECRELOC); 156 } 157 } 158 159 /* 160 * Debug function just to park the CPU 161 */ 162 163 void 164 halt() 165 { 166 while (1) 167 cpu_sleep(0); 168 } 169 170 171 /* Sync the discs and unmount the filesystems */ 172 173 void 174 bootsync(void) 175 { 176 static int bootsyncdone = 0; 177 178 if (bootsyncdone) return; 179 180 bootsyncdone = 1; 181 182 /* Make sure we can still manage to do things */ 183 if (GetCPSR() & I32_bit) { 184 /* 185 * If we get here then boot has been called without RB_NOSYNC 186 * and interrupts were disabled. This means the boot() call 187 * did not come from a user process e.g. shutdown, but must 188 * have come from somewhere in the kernel. 189 */ 190 IRQenable; 191 printf("Warning IRQ's disabled during boot()\n"); 192 } 193 194 vfs_shutdown(); 195 } 196 197 /* 198 * void cpu_startup(void) 199 * 200 * Machine dependant startup code. 201 * 202 */ 203 void 204 cpu_startup() 205 { 206 paddr_t minaddr; 207 paddr_t maxaddr; 208 caddr_t sysbase; 209 caddr_t size; 210 vsize_t bufsize; 211 u_int loop, base, residual; 212 char pbuf[9]; 213 214 #ifndef ARM32_PMAP_NEW 215 /* This has moved to initarm() */ 216 proc0paddr = (struct user *)kernelstack.pv_va; 217 lwp0.l_addr = proc0paddr; 218 #endif 219 220 /* Set the cpu control register */ 221 cpu_setup(boot_args); 222 223 #ifndef ARM32_PMAP_NEW 224 /* All domains MUST be clients, permissions are VERY important */ 225 cpu_domains(DOMAIN_CLIENT); 226 #endif 227 228 /* Lock down zero page */ 229 vector_page_setprot(VM_PROT_READ); 230 231 /* 232 * Give pmap a chance to set up a few more things now the vm 233 * is initialised 234 */ 235 pmap_postinit(); 236 237 /* 238 * Initialize error message buffer (at end of core). 239 */ 240 241 /* msgbufphys was setup during the secondary boot strap */ 242 for (loop = 0; loop < btoc(MSGBUFSIZE); ++loop) 243 pmap_kenter_pa((vaddr_t)msgbufaddr + loop * PAGE_SIZE, 244 msgbufphys + loop * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE); 245 pmap_update(pmap_kernel()); 246 initmsgbuf(msgbufaddr, round_page(MSGBUFSIZE)); 247 248 /* 249 * Identify ourselves for the msgbuf (everything printed earlier will 250 * not be buffered). 251 */ 252 printf(version); 253 254 format_bytes(pbuf, sizeof(pbuf), arm_ptob(physmem)); 255 printf("total memory = %s\n", pbuf); 256 257 /* 258 * Find out how much space we need, allocate it, 259 * and then give everything true virtual addresses. 260 */ 261 size = allocsys(NULL, NULL); 262 sysbase = (caddr_t)uvm_km_zalloc(kernel_map, round_page((vaddr_t)size)); 263 if (sysbase == 0) 264 panic( 265 "cpu_startup: no room for system tables; %d bytes required", 266 (u_int)size); 267 if ((caddr_t)((allocsys(sysbase, NULL) - sysbase)) != size) 268 panic("cpu_startup: system table size inconsistency"); 269 270 /* 271 * Now allocate buffers proper. They are different than the above 272 * in that they usually occupy more virtual memory than physical. 273 */ 274 bufsize = MAXBSIZE * nbuf; 275 if (uvm_map(kernel_map, (vaddr_t *)&buffers, round_page(bufsize), 276 NULL, UVM_UNKNOWN_OFFSET, 0, 277 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 278 UVM_ADV_NORMAL, 0)) != 0) 279 panic("cpu_startup: cannot allocate UVM space for buffers"); 280 minaddr = (vaddr_t)buffers; 281 if ((bufpages / nbuf) >= btoc(MAXBSIZE)) { 282 /* don't want to alloc more physical mem than needed */ 283 bufpages = btoc(MAXBSIZE) * nbuf; 284 } 285 286 base = bufpages / nbuf; 287 residual = bufpages % nbuf; 288 for (loop = 0; loop < nbuf; ++loop) { 289 vsize_t curbufsize; 290 vaddr_t curbuf; 291 struct vm_page *pg; 292 293 /* 294 * Each buffer has MAXBSIZE bytes of VM space allocated. Of 295 * that MAXBSIZE space, we allocate and map (base+1) pages 296 * for the first "residual" buffers, and then we allocate 297 * "base" pages for the rest. 298 */ 299 curbuf = (vaddr_t) buffers + (loop * MAXBSIZE); 300 curbufsize = PAGE_SIZE * ((loop < residual) ? (base+1) : base); 301 302 while (curbufsize) { 303 pg = uvm_pagealloc(NULL, 0, NULL, 0); 304 if (pg == NULL) 305 panic("cpu_startup: not enough memory for buffer cache"); 306 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 307 VM_PROT_READ|VM_PROT_WRITE); 308 curbuf += PAGE_SIZE; 309 curbufsize -= PAGE_SIZE; 310 } 311 } 312 pmap_update(pmap_kernel()); 313 314 /* 315 * Allocate a submap for exec arguments. This map effectively 316 * limits the number of processes exec'ing at any time. 317 */ 318 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 319 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 320 321 /* 322 * Allocate a submap for physio 323 */ 324 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 325 VM_PHYS_SIZE, 0, FALSE, NULL); 326 327 /* 328 * Finally, allocate mbuf cluster submap. 329 */ 330 mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 331 nmbclusters * mclbytes, VM_MAP_INTRSAFE, 332 FALSE, NULL); 333 334 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 335 printf("avail memory = %s\n", pbuf); 336 format_bytes(pbuf, sizeof(pbuf), bufpages * PAGE_SIZE); 337 printf("using %u buffers containing %s of memory\n", nbuf, pbuf); 338 339 /* 340 * Set up buffers, so they can be used to read disk labels. 341 */ 342 bufinit(); 343 344 curpcb = &lwp0.l_addr->u_pcb; 345 curpcb->pcb_flags = 0; 346 curpcb->pcb_un.un_32.pcb32_und_sp = (u_int)lwp0.l_addr + 347 USPACE_UNDEF_STACK_TOP; 348 curpcb->pcb_un.un_32.pcb32_sp = (u_int)lwp0.l_addr + 349 USPACE_SVC_STACK_TOP; 350 #ifndef ARM32_PMAP_NEW 351 (void) pmap_extract(pmap_kernel(), (vaddr_t)(pmap_kernel())->pm_pdir, 352 &curpcb->pcb_pagedir); 353 #else 354 pmap_set_pcb_pagedir(pmap_kernel(), curpcb); 355 #endif 356 357 curpcb->pcb_tf = (struct trapframe *)curpcb->pcb_un.un_32.pcb32_sp - 1; 358 } 359 360 /* 361 * machine dependent system variables. 362 */ 363 364 int 365 cpu_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 366 int *name; 367 u_int namelen; 368 void *oldp; 369 size_t *oldlenp; 370 void *newp; 371 size_t newlen; 372 struct proc *p; 373 { 374 /* all sysctl names at this level are terminal */ 375 if (namelen != 1) 376 return (ENOTDIR); /* overloaded */ 377 378 switch (name[0]) { 379 case CPU_DEBUG: 380 return(sysctl_int(oldp, oldlenp, newp, newlen, &kernel_debug)); 381 382 case CPU_BOOTED_DEVICE: 383 if (booted_device != NULL) 384 return (sysctl_rdstring(oldp, oldlenp, newp, 385 booted_device->dv_xname)); 386 return (EOPNOTSUPP); 387 388 case CPU_CONSDEV: { 389 dev_t consdev; 390 if (cn_tab != NULL) 391 consdev = cn_tab->cn_dev; 392 else 393 consdev = NODEV; 394 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 395 sizeof consdev)); 396 } 397 case CPU_BOOTED_KERNEL: { 398 if (booted_kernel != NULL && booted_kernel[0] != '\0') 399 return sysctl_rdstring(oldp, oldlenp, newp, 400 booted_kernel); 401 return (EOPNOTSUPP); 402 } 403 case CPU_POWERSAVE: { 404 int error, newval; 405 406 newval = cpu_do_powersave; 407 408 if (cpufuncs.cf_sleep == (void *) cpufunc_nullop) 409 error = sysctl_rdint(oldp, oldlenp, newp, newval); 410 else 411 error = sysctl_int(oldp, oldlenp, newp, newlen, 412 &newval); 413 if (error || newval == cpu_do_powersave) 414 return (error); 415 416 if (newval < 0 || newval > 1) 417 return (EINVAL); 418 419 cpu_do_powersave = newval; 420 return (0); 421 } 422 423 default: 424 return (EOPNOTSUPP); 425 } 426 /* NOTREACHED */ 427 } 428 429 void 430 parse_mi_bootargs(args) 431 char *args; 432 { 433 int integer; 434 435 if (get_bootconf_option(args, "single", BOOTOPT_TYPE_BOOLEAN, &integer) 436 || get_bootconf_option(args, "-s", BOOTOPT_TYPE_BOOLEAN, &integer)) 437 if (integer) 438 boothowto |= RB_SINGLE; 439 if (get_bootconf_option(args, "kdb", BOOTOPT_TYPE_BOOLEAN, &integer) 440 || get_bootconf_option(args, "-k", BOOTOPT_TYPE_BOOLEAN, &integer)) 441 if (integer) 442 boothowto |= RB_KDB; 443 if (get_bootconf_option(args, "ask", BOOTOPT_TYPE_BOOLEAN, &integer) 444 || get_bootconf_option(args, "-a", BOOTOPT_TYPE_BOOLEAN, &integer)) 445 if (integer) 446 boothowto |= RB_ASKNAME; 447 448 #ifdef PMAP_DEBUG 449 if (get_bootconf_option(args, "pmapdebug", BOOTOPT_TYPE_INT, &integer)) { 450 pmap_debug_level = integer; 451 pmap_debug(pmap_debug_level); 452 } 453 #endif /* PMAP_DEBUG */ 454 455 /* if (get_bootconf_option(args, "nbuf", BOOTOPT_TYPE_INT, &integer)) 456 bufpages = integer;*/ 457 458 #if !defined(PMAP_STATIC_L1S) && !defined(ARM32_PMAP_NEW) 459 if (get_bootconf_option(args, "maxproc", BOOTOPT_TYPE_INT, &integer)) { 460 max_processes = integer; 461 if (max_processes < 16) 462 max_processes = 16; 463 /* Limit is PDSIZE * (max_processes + 1) <= 4MB */ 464 if (max_processes > 255) 465 max_processes = 255; 466 } 467 #endif /* !PMAP_STATUC_L1S && !ARM32_PMAP_NEW */ 468 #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE) 469 if (get_bootconf_option(args, "memorydisc", BOOTOPT_TYPE_INT, &integer) 470 || get_bootconf_option(args, "memorydisk", BOOTOPT_TYPE_INT, &integer)) { 471 md_root_size = integer; 472 md_root_size *= 1024; 473 if (md_root_size < 32*1024) 474 md_root_size = 32*1024; 475 if (md_root_size > 2048*1024) 476 md_root_size = 2048*1024; 477 } 478 #endif /* NMD && MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */ 479 480 if (get_bootconf_option(args, "quiet", BOOTOPT_TYPE_BOOLEAN, &integer) 481 || get_bootconf_option(args, "-q", BOOTOPT_TYPE_BOOLEAN, &integer)) 482 if (integer) 483 boothowto |= AB_QUIET; 484 if (get_bootconf_option(args, "verbose", BOOTOPT_TYPE_BOOLEAN, &integer) 485 || get_bootconf_option(args, "-v", BOOTOPT_TYPE_BOOLEAN, &integer)) 486 if (integer) 487 boothowto |= AB_VERBOSE; 488 } 489
Indexes created Mon Sep 29 21:09:56 GMT 2025