arm32_machdep.c revision 1.38
1 /* $NetBSD: arm32_machdep.c,v 1.38 2003/09/21 00:26:09 matt 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 <sys/cdefs.h> 45 __KERNEL_RCSID(0, "$NetBSD: arm32_machdep.c,v 1.38 2003/09/21 00:26:09 matt Exp $"); 46 47 #include "opt_md.h" 48 #include "opt_pmap_debug.h" 49 50 #include <sys/param.h> 51 #include <sys/systm.h> 52 #include <sys/reboot.h> 53 #include <sys/proc.h> 54 #include <sys/user.h> 55 #include <sys/kernel.h> 56 #include <sys/mbuf.h> 57 #include <sys/mount.h> 58 #include <sys/buf.h> 59 #include <sys/msgbuf.h> 60 #include <sys/device.h> 61 #include <uvm/uvm_extern.h> 62 #include <sys/sysctl.h> 63 64 #include <dev/cons.h> 65 66 #include <arm/arm32/katelib.h> 67 #include <arm/arm32/machdep.h> 68 #include <machine/bootconfig.h> 69 70 #include "opt_ipkdb.h" 71 #include "md.h" 72 73 struct vm_map *exec_map = NULL; 74 struct vm_map *mb_map = NULL; 75 struct vm_map *phys_map = NULL; 76 77 extern int physmem; 78 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 void data_abort_handler __P((trapframe_t *frame)); 106 void prefetch_abort_handler __P((trapframe_t *frame)); 107 extern void configure __P((void)); 108 109 /* 110 * arm32_vector_init: 111 * 112 * Initialize the vector page, and select whether or not to 113 * relocate the vectors. 114 * 115 * NOTE: We expect the vector page to be mapped at its expected 116 * destination. 117 */ 118 void 119 arm32_vector_init(vaddr_t va, int which) 120 { 121 extern unsigned int page0[], page0_data[]; 122 unsigned int *vectors = (int *) va; 123 unsigned int *vectors_data = vectors + (page0_data - page0); 124 int vec; 125 126 /* 127 * Loop through the vectors we're taking over, and copy the 128 * vector's insn and data word. 129 */ 130 for (vec = 0; vec < ARM_NVEC; vec++) { 131 if ((which & (1 << vec)) == 0) { 132 /* Don't want to take over this vector. */ 133 continue; 134 } 135 vectors[vec] = page0[vec]; 136 vectors_data[vec] = page0_data[vec]; 137 } 138 139 /* Now sync the vectors. */ 140 cpu_icache_sync_range(va, (ARM_NVEC * 2) * sizeof(u_int)); 141 142 vector_page = va; 143 144 if (va == ARM_VECTORS_HIGH) { 145 /* 146 * Assume the MD caller knows what it's doing here, and 147 * really does want the vector page relocated. 148 * 149 * Note: This has to be done here (and not just in 150 * cpu_setup()) because the vector page needs to be 151 * accessible *before* cpu_startup() is called. 152 * Think ddb(9) ... 153 * 154 * NOTE: If the CPU control register is not readable, 155 * this will totally fail! We'll just assume that 156 * any system that has high vector support has a 157 * readable CPU control register, for now. If we 158 * ever encounter one that does not, we'll have to 159 * rethink this. 160 */ 161 cpu_control(CPU_CONTROL_VECRELOC, CPU_CONTROL_VECRELOC); 162 } 163 } 164 165 /* 166 * Debug function just to park the CPU 167 */ 168 169 void 170 halt() 171 { 172 while (1) 173 cpu_sleep(0); 174 } 175 176 177 /* Sync the discs and unmount the filesystems */ 178 179 void 180 bootsync(void) 181 { 182 static int bootsyncdone = 0; 183 184 if (bootsyncdone) return; 185 186 bootsyncdone = 1; 187 188 /* Make sure we can still manage to do things */ 189 if (GetCPSR() & I32_bit) { 190 /* 191 * If we get here then boot has been called without RB_NOSYNC 192 * and interrupts were disabled. This means the boot() call 193 * did not come from a user process e.g. shutdown, but must 194 * have come from somewhere in the kernel. 195 */ 196 IRQenable; 197 printf("Warning IRQ's disabled during boot()\n"); 198 } 199 200 vfs_shutdown(); 201 } 202 203 /* 204 * void cpu_startup(void) 205 * 206 * Machine dependant startup code. 207 * 208 */ 209 void 210 cpu_startup() 211 { 212 paddr_t minaddr; 213 paddr_t maxaddr; 214 caddr_t sysbase; 215 caddr_t size; 216 vsize_t bufsize; 217 u_int loop, base, residual; 218 char pbuf[9]; 219 220 /* Set the cpu control register */ 221 cpu_setup(boot_args); 222 223 /* Lock down zero page */ 224 vector_page_setprot(VM_PROT_READ); 225 226 /* 227 * Give pmap a chance to set up a few more things now the vm 228 * is initialised 229 */ 230 pmap_postinit(); 231 232 /* 233 * Initialize error message buffer (at end of core). 234 */ 235 236 /* msgbufphys was setup during the secondary boot strap */ 237 for (loop = 0; loop < btoc(MSGBUFSIZE); ++loop) 238 pmap_kenter_pa((vaddr_t)msgbufaddr + loop * PAGE_SIZE, 239 msgbufphys + loop * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE); 240 pmap_update(pmap_kernel()); 241 initmsgbuf(msgbufaddr, round_page(MSGBUFSIZE)); 242 243 /* 244 * Identify ourselves for the msgbuf (everything printed earlier will 245 * not be buffered). 246 */ 247 printf(version); 248 249 format_bytes(pbuf, sizeof(pbuf), arm_ptob(physmem)); 250 printf("total memory = %s\n", pbuf); 251 252 /* 253 * Find out how much space we need, allocate it, 254 * and then give everything true virtual addresses. 255 */ 256 size = allocsys(NULL, NULL); 257 sysbase = (caddr_t)uvm_km_zalloc(kernel_map, round_page((vaddr_t)size)); 258 if (sysbase == 0) 259 panic( 260 "cpu_startup: no room for system tables; %d bytes required", 261 (u_int)size); 262 if ((caddr_t)((allocsys(sysbase, NULL) - sysbase)) != size) 263 panic("cpu_startup: system table size inconsistency"); 264 265 /* 266 * Now allocate buffers proper. They are different than the above 267 * in that they usually occupy more virtual memory than physical. 268 */ 269 bufsize = MAXBSIZE * nbuf; 270 if (uvm_map(kernel_map, (void *)&buffers, round_page(bufsize), 271 NULL, UVM_UNKNOWN_OFFSET, 0, 272 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 273 UVM_ADV_NORMAL, 0)) != 0) 274 panic("cpu_startup: cannot allocate UVM space for buffers"); 275 minaddr = (vaddr_t)buffers; 276 if ((bufpages / nbuf) >= btoc(MAXBSIZE)) { 277 /* don't want to alloc more physical mem than needed */ 278 bufpages = btoc(MAXBSIZE) * nbuf; 279 } 280 281 base = bufpages / nbuf; 282 residual = bufpages % nbuf; 283 for (loop = 0; loop < nbuf; ++loop) { 284 vsize_t curbufsize; 285 vaddr_t curbuf; 286 struct vm_page *pg; 287 288 /* 289 * Each buffer has MAXBSIZE bytes of VM space allocated. Of 290 * that MAXBSIZE space, we allocate and map (base+1) pages 291 * for the first "residual" buffers, and then we allocate 292 * "base" pages for the rest. 293 */ 294 curbuf = (vaddr_t) buffers + (loop * MAXBSIZE); 295 curbufsize = PAGE_SIZE * ((loop < residual) ? (base+1) : base); 296 297 while (curbufsize) { 298 pg = uvm_pagealloc(NULL, 0, NULL, 0); 299 if (pg == NULL) 300 panic("cpu_startup: not enough memory for buffer cache"); 301 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 302 VM_PROT_READ|VM_PROT_WRITE); 303 curbuf += PAGE_SIZE; 304 curbufsize -= PAGE_SIZE; 305 } 306 } 307 pmap_update(pmap_kernel()); 308 309 /* 310 * Allocate a submap for exec arguments. This map effectively 311 * limits the number of processes exec'ing at any time. 312 */ 313 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 314 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 315 316 /* 317 * Allocate a submap for physio 318 */ 319 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 320 VM_PHYS_SIZE, 0, FALSE, NULL); 321 322 /* 323 * Finally, allocate mbuf cluster submap. 324 */ 325 mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 326 nmbclusters * mclbytes, VM_MAP_INTRSAFE, 327 FALSE, NULL); 328 329 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 330 printf("avail memory = %s\n", pbuf); 331 format_bytes(pbuf, sizeof(pbuf), bufpages * PAGE_SIZE); 332 printf("using %u buffers containing %s of memory\n", nbuf, pbuf); 333 334 /* 335 * Set up buffers, so they can be used to read disk labels. 336 */ 337 bufinit(); 338 339 curpcb = &lwp0.l_addr->u_pcb; 340 curpcb->pcb_flags = 0; 341 curpcb->pcb_un.un_32.pcb32_und_sp = (u_int)lwp0.l_addr + 342 USPACE_UNDEF_STACK_TOP; 343 curpcb->pcb_un.un_32.pcb32_sp = (u_int)lwp0.l_addr + 344 USPACE_SVC_STACK_TOP; 345 pmap_set_pcb_pagedir(pmap_kernel(), curpcb); 346 347 curpcb->pcb_tf = (struct trapframe *)curpcb->pcb_un.un_32.pcb32_sp - 1; 348 } 349 350 /* 351 * machine dependent system variables. 352 */ 353 354 int 355 cpu_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 356 int *name; 357 u_int namelen; 358 void *oldp; 359 size_t *oldlenp; 360 void *newp; 361 size_t newlen; 362 struct proc *p; 363 { 364 /* all sysctl names at this level are terminal */ 365 if (namelen != 1) 366 return (ENOTDIR); /* overloaded */ 367 368 switch (name[0]) { 369 case CPU_DEBUG: 370 return(sysctl_int(oldp, oldlenp, newp, newlen, &kernel_debug)); 371 372 case CPU_BOOTED_DEVICE: 373 if (booted_device != NULL) 374 return (sysctl_rdstring(oldp, oldlenp, newp, 375 booted_device->dv_xname)); 376 return (EOPNOTSUPP); 377 378 case CPU_CONSDEV: { 379 dev_t consdev; 380 if (cn_tab != NULL) 381 consdev = cn_tab->cn_dev; 382 else 383 consdev = NODEV; 384 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 385 sizeof consdev)); 386 } 387 case CPU_BOOTED_KERNEL: { 388 if (booted_kernel != NULL && booted_kernel[0] != '\0') 389 return sysctl_rdstring(oldp, oldlenp, newp, 390 booted_kernel); 391 return (EOPNOTSUPP); 392 } 393 case CPU_POWERSAVE: { 394 int error, newval; 395 396 newval = cpu_do_powersave; 397 398 if (cpufuncs.cf_sleep == (void *) cpufunc_nullop) 399 error = sysctl_rdint(oldp, oldlenp, newp, newval); 400 else 401 error = sysctl_int(oldp, oldlenp, newp, newlen, 402 &newval); 403 if (error || newval == cpu_do_powersave) 404 return (error); 405 406 if (newval < 0 || newval > 1) 407 return (EINVAL); 408 409 cpu_do_powersave = newval; 410 return (0); 411 } 412 413 default: 414 return (EOPNOTSUPP); 415 } 416 /* NOTREACHED */ 417 } 418 419 void 420 parse_mi_bootargs(args) 421 char *args; 422 { 423 int integer; 424 425 if (get_bootconf_option(args, "single", BOOTOPT_TYPE_BOOLEAN, &integer) 426 || get_bootconf_option(args, "-s", BOOTOPT_TYPE_BOOLEAN, &integer)) 427 if (integer) 428 boothowto |= RB_SINGLE; 429 if (get_bootconf_option(args, "kdb", BOOTOPT_TYPE_BOOLEAN, &integer) 430 || get_bootconf_option(args, "-k", BOOTOPT_TYPE_BOOLEAN, &integer)) 431 if (integer) 432 boothowto |= RB_KDB; 433 if (get_bootconf_option(args, "ask", BOOTOPT_TYPE_BOOLEAN, &integer) 434 || get_bootconf_option(args, "-a", BOOTOPT_TYPE_BOOLEAN, &integer)) 435 if (integer) 436 boothowto |= RB_ASKNAME; 437 438 #ifdef PMAP_DEBUG 439 if (get_bootconf_option(args, "pmapdebug", BOOTOPT_TYPE_INT, &integer)) { 440 pmap_debug_level = integer; 441 pmap_debug(pmap_debug_level); 442 } 443 #endif /* PMAP_DEBUG */ 444 445 /* if (get_bootconf_option(args, "nbuf", BOOTOPT_TYPE_INT, &integer)) 446 bufpages = integer;*/ 447 448 #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE) 449 if (get_bootconf_option(args, "memorydisc", BOOTOPT_TYPE_INT, &integer) 450 || get_bootconf_option(args, "memorydisk", BOOTOPT_TYPE_INT, &integer)) { 451 md_root_size = integer; 452 md_root_size *= 1024; 453 if (md_root_size < 32*1024) 454 md_root_size = 32*1024; 455 if (md_root_size > 2048*1024) 456 md_root_size = 2048*1024; 457 } 458 #endif /* NMD && MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */ 459 460 if (get_bootconf_option(args, "quiet", BOOTOPT_TYPE_BOOLEAN, &integer) 461 || get_bootconf_option(args, "-q", BOOTOPT_TYPE_BOOLEAN, &integer)) 462 if (integer) 463 boothowto |= AB_QUIET; 464 if (get_bootconf_option(args, "verbose", BOOTOPT_TYPE_BOOLEAN, &integer) 465 || get_bootconf_option(args, "-v", BOOTOPT_TYPE_BOOLEAN, &integer)) 466 if (integer) 467 boothowto |= AB_VERBOSE; 468 } 469
Indexes created Mon Sep 29 21:09:56 GMT 2025