arm32_machdep.c revision 1.55.10.1
1 /* $NetBSD: arm32_machdep.c,v 1.55.10.1 2008/05/16 02:21:55 yamt 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 1.55.10.1 2008/05/16 02:21:55 yamt Exp $"); 46 47 #include "opt_md.h" 48 #include "opt_cpuoptions.h" 49 #include "opt_pmap_debug.h" 50 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/reboot.h> 54 #include <sys/proc.h> 55 #include <sys/user.h> 56 #include <sys/kernel.h> 57 #include <sys/mbuf.h> 58 #include <sys/mount.h> 59 #include <sys/buf.h> 60 #include <sys/msgbuf.h> 61 #include <sys/device.h> 62 #include <uvm/uvm_extern.h> 63 #include <sys/sysctl.h> 64 #include <sys/cpu.h> 65 66 #include <dev/cons.h> 67 68 #include <arm/arm32/katelib.h> 69 #include <arm/arm32/machdep.h> 70 #include <machine/bootconfig.h> 71 72 #include "md.h" 73 74 struct vm_map *exec_map = NULL; 75 struct vm_map *mb_map = NULL; 76 struct vm_map *phys_map = NULL; 77 78 extern int physmem; 79 80 #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE) 81 extern size_t md_root_size; /* Memory disc size */ 82 #endif /* NMD && MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */ 83 84 pv_addr_t kernelstack; 85 86 /* the following is used externally (sysctl_hw) */ 87 char machine[] = MACHINE; /* from <machine/param.h> */ 88 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 89 90 /* Our exported CPU info; we can have only one. */ 91 struct cpu_info cpu_info_store = { 92 .ci_cpl = IPL_HIGH, 93 #ifndef PROCESS_ID_IS_CURLWP 94 .ci_curlwp = &lwp0, 95 #endif 96 }; 97 98 void * msgbufaddr; 99 extern paddr_t msgbufphys; 100 101 int kernel_debug = 0; 102 103 struct user *proc0paddr; 104 105 /* exported variable to be filled in by the bootloaders */ 106 char *booted_kernel; 107 108 109 /* Prototypes */ 110 111 void data_abort_handler __P((trapframe_t *frame)); 112 void prefetch_abort_handler __P((trapframe_t *frame)); 113 extern void configure __P((void)); 114 115 /* 116 * arm32_vector_init: 117 * 118 * Initialize the vector page, and select whether or not to 119 * relocate the vectors. 120 * 121 * NOTE: We expect the vector page to be mapped at its expected 122 * destination. 123 */ 124 void 125 arm32_vector_init(vaddr_t va, int which) 126 { 127 extern unsigned int page0[], page0_data[]; 128 unsigned int *vectors = (int *) va; 129 unsigned int *vectors_data = vectors + (page0_data - page0); 130 int vec; 131 132 /* 133 * Loop through the vectors we're taking over, and copy the 134 * vector's insn and data word. 135 */ 136 for (vec = 0; vec < ARM_NVEC; vec++) { 137 if ((which & (1 << vec)) == 0) { 138 /* Don't want to take over this vector. */ 139 continue; 140 } 141 vectors[vec] = page0[vec]; 142 vectors_data[vec] = page0_data[vec]; 143 } 144 145 /* Now sync the vectors. */ 146 cpu_icache_sync_range(va, (ARM_NVEC * 2) * sizeof(u_int)); 147 148 vector_page = va; 149 150 if (va == ARM_VECTORS_HIGH) { 151 /* 152 * Assume the MD caller knows what it's doing here, and 153 * really does want the vector page relocated. 154 * 155 * Note: This has to be done here (and not just in 156 * cpu_setup()) because the vector page needs to be 157 * accessible *before* cpu_startup() is called. 158 * Think ddb(9) ... 159 * 160 * NOTE: If the CPU control register is not readable, 161 * this will totally fail! We'll just assume that 162 * any system that has high vector support has a 163 * readable CPU control register, for now. If we 164 * ever encounter one that does not, we'll have to 165 * rethink this. 166 */ 167 cpu_control(CPU_CONTROL_VECRELOC, CPU_CONTROL_VECRELOC); 168 } 169 } 170 171 /* 172 * Debug function just to park the CPU 173 */ 174 175 void 176 halt() 177 { 178 while (1) 179 cpu_sleep(0); 180 } 181 182 183 /* Sync the discs and unmount the filesystems */ 184 185 void 186 bootsync(void) 187 { 188 static int bootsyncdone = 0; 189 190 if (bootsyncdone) return; 191 192 bootsyncdone = 1; 193 194 /* Make sure we can still manage to do things */ 195 if (GetCPSR() & I32_bit) { 196 /* 197 * If we get here then boot has been called without RB_NOSYNC 198 * and interrupts were disabled. This means the boot() call 199 * did not come from a user process e.g. shutdown, but must 200 * have come from somewhere in the kernel. 201 */ 202 IRQenable; 203 printf("Warning IRQ's disabled during boot()\n"); 204 } 205 206 vfs_shutdown(); 207 } 208 209 /* 210 * void cpu_startup(void) 211 * 212 * Machine dependant startup code. 213 * 214 */ 215 void 216 cpu_startup() 217 { 218 vaddr_t minaddr; 219 vaddr_t maxaddr; 220 u_int loop; 221 char pbuf[9]; 222 223 /* Set the CPU control register */ 224 cpu_setup(boot_args); 225 226 /* Lock down zero page */ 227 vector_page_setprot(VM_PROT_READ); 228 229 /* 230 * Give pmap a chance to set up a few more things now the vm 231 * is initialised 232 */ 233 pmap_postinit(); 234 235 /* 236 * Initialize error message buffer (at end of core). 237 */ 238 239 /* msgbufphys was setup during the secondary boot strap */ 240 for (loop = 0; loop < btoc(MSGBUFSIZE); ++loop) 241 pmap_kenter_pa((vaddr_t)msgbufaddr + loop * PAGE_SIZE, 242 msgbufphys + loop * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE); 243 pmap_update(pmap_kernel()); 244 initmsgbuf(msgbufaddr, round_page(MSGBUFSIZE)); 245 246 /* 247 * Identify ourselves for the msgbuf (everything printed earlier will 248 * not be buffered). 249 */ 250 printf("%s%s", copyright, version); 251 252 format_bytes(pbuf, sizeof(pbuf), arm_ptob(physmem)); 253 printf("total memory = %s\n", pbuf); 254 255 minaddr = 0; 256 257 /* 258 * Allocate a submap for exec arguments. This map effectively 259 * limits the number of processes exec'ing at any time. 260 */ 261 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 262 16*NCARGS, VM_MAP_PAGEABLE, false, NULL); 263 264 /* 265 * Allocate a submap for physio 266 */ 267 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 268 VM_PHYS_SIZE, 0, false, NULL); 269 270 /* 271 * Finally, allocate mbuf cluster submap. 272 */ 273 mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 274 nmbclusters * mclbytes, VM_MAP_INTRSAFE, 275 false, NULL); 276 277 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 278 printf("avail memory = %s\n", pbuf); 279 280 curpcb = &lwp0.l_addr->u_pcb; 281 curpcb->pcb_flags = 0; 282 curpcb->pcb_un.un_32.pcb32_sp = (u_int)lwp0.l_addr + 283 USPACE_SVC_STACK_TOP; 284 285 curpcb->pcb_tf = (struct trapframe *)curpcb->pcb_un.un_32.pcb32_sp - 1; 286 } 287 288 /* 289 * machine dependent system variables. 290 */ 291 static int 292 sysctl_machdep_booted_device(SYSCTLFN_ARGS) 293 { 294 struct sysctlnode node; 295 296 if (booted_device == NULL) 297 return (EOPNOTSUPP); 298 299 node = *rnode; 300 node.sysctl_data = booted_device->dv_xname; 301 node.sysctl_size = strlen(booted_device->dv_xname) + 1; 302 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 303 } 304 305 static int 306 sysctl_machdep_booted_kernel(SYSCTLFN_ARGS) 307 { 308 struct sysctlnode node; 309 310 if (booted_kernel == NULL || booted_kernel[0] == '\0') 311 return (EOPNOTSUPP); 312 313 node = *rnode; 314 node.sysctl_data = booted_kernel; 315 node.sysctl_size = strlen(booted_kernel) + 1; 316 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 317 } 318 319 static int 320 sysctl_machdep_powersave(SYSCTLFN_ARGS) 321 { 322 struct sysctlnode node = *rnode; 323 int error, newval; 324 325 newval = cpu_do_powersave; 326 node.sysctl_data = &newval; 327 if (cpufuncs.cf_sleep == (void *) cpufunc_nullop) 328 node.sysctl_flags &= ~CTLFLAG_READWRITE; 329 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 330 if (error || newp == NULL || newval == cpu_do_powersave) 331 return (error); 332 333 if (newval < 0 || newval > 1) 334 return (EINVAL); 335 cpu_do_powersave = newval; 336 337 return (0); 338 } 339 340 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup") 341 { 342 343 sysctl_createv(clog, 0, NULL, NULL, 344 CTLFLAG_PERMANENT, 345 CTLTYPE_NODE, "machdep", NULL, 346 NULL, 0, NULL, 0, 347 CTL_MACHDEP, CTL_EOL); 348 349 sysctl_createv(clog, 0, NULL, NULL, 350 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 351 CTLTYPE_INT, "debug", NULL, 352 NULL, 0, &kernel_debug, 0, 353 CTL_MACHDEP, CPU_DEBUG, CTL_EOL); 354 sysctl_createv(clog, 0, NULL, NULL, 355 CTLFLAG_PERMANENT, 356 CTLTYPE_STRING, "booted_device", NULL, 357 sysctl_machdep_booted_device, 0, NULL, 0, 358 CTL_MACHDEP, CPU_BOOTED_DEVICE, CTL_EOL); 359 sysctl_createv(clog, 0, NULL, NULL, 360 CTLFLAG_PERMANENT, 361 CTLTYPE_STRING, "booted_kernel", NULL, 362 sysctl_machdep_booted_kernel, 0, NULL, 0, 363 CTL_MACHDEP, CPU_BOOTED_KERNEL, CTL_EOL); 364 sysctl_createv(clog, 0, NULL, NULL, 365 CTLFLAG_PERMANENT, 366 CTLTYPE_STRUCT, "console_device", NULL, 367 sysctl_consdev, 0, NULL, sizeof(dev_t), 368 CTL_MACHDEP, CPU_CONSDEV, CTL_EOL); 369 sysctl_createv(clog, 0, NULL, NULL, 370 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 371 CTLTYPE_INT, "powersave", NULL, 372 sysctl_machdep_powersave, 0, &cpu_do_powersave, 0, 373 CTL_MACHDEP, CPU_POWERSAVE, CTL_EOL); 374 } 375 376 void 377 parse_mi_bootargs(args) 378 char *args; 379 { 380 int integer; 381 382 if (get_bootconf_option(args, "single", BOOTOPT_TYPE_BOOLEAN, &integer) 383 || get_bootconf_option(args, "-s", BOOTOPT_TYPE_BOOLEAN, &integer)) 384 if (integer) 385 boothowto |= RB_SINGLE; 386 if (get_bootconf_option(args, "kdb", BOOTOPT_TYPE_BOOLEAN, &integer) 387 || get_bootconf_option(args, "-k", BOOTOPT_TYPE_BOOLEAN, &integer)) 388 if (integer) 389 boothowto |= RB_KDB; 390 if (get_bootconf_option(args, "ask", BOOTOPT_TYPE_BOOLEAN, &integer) 391 || get_bootconf_option(args, "-a", BOOTOPT_TYPE_BOOLEAN, &integer)) 392 if (integer) 393 boothowto |= RB_ASKNAME; 394 395 #ifdef PMAP_DEBUG 396 if (get_bootconf_option(args, "pmapdebug", BOOTOPT_TYPE_INT, &integer)) { 397 pmap_debug_level = integer; 398 pmap_debug(pmap_debug_level); 399 } 400 #endif /* PMAP_DEBUG */ 401 402 /* if (get_bootconf_option(args, "nbuf", BOOTOPT_TYPE_INT, &integer)) 403 bufpages = integer;*/ 404 405 #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE) 406 if (get_bootconf_option(args, "memorydisc", BOOTOPT_TYPE_INT, &integer) 407 || get_bootconf_option(args, "memorydisk", BOOTOPT_TYPE_INT, &integer)) { 408 md_root_size = integer; 409 md_root_size *= 1024; 410 if (md_root_size < 32*1024) 411 md_root_size = 32*1024; 412 if (md_root_size > 2048*1024) 413 md_root_size = 2048*1024; 414 } 415 #endif /* NMD && MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */ 416 417 if (get_bootconf_option(args, "quiet", BOOTOPT_TYPE_BOOLEAN, &integer) 418 || get_bootconf_option(args, "-q", BOOTOPT_TYPE_BOOLEAN, &integer)) 419 if (integer) 420 boothowto |= AB_QUIET; 421 if (get_bootconf_option(args, "verbose", BOOTOPT_TYPE_BOOLEAN, &integer) 422 || get_bootconf_option(args, "-v", BOOTOPT_TYPE_BOOLEAN, &integer)) 423 if (integer) 424 boothowto |= AB_VERBOSE; 425 } 426 427 void 428 cpu_need_resched(struct cpu_info *ci, int flags) 429 { 430 bool immed = (flags & RESCHED_IMMED) != 0; 431 432 if (ci->ci_want_resched && !immed) 433 return; 434 435 ci->ci_want_resched = 1; 436 if (curlwp != ci->ci_data.cpu_idlelwp) 437 setsoftast(); 438 } 439 440 bool 441 cpu_intr_p(void) 442 { 443 return curcpu()->ci_intr_depth != 0; 444 } 445 446 #ifdef __HAVE_FAST_SOFTINTS 447 #if IPL_SOFTSERIAL != IPL_SOFTNET + 1 448 #error IPLs are screwed up 449 #endif 450 #if IPL_SOFTNET != IPL_SOFTBIO + 1 451 #error IPLs are screwed up 452 #endif 453 #if IPL_SOFTBIO != IPL_SOFTCLOCK + 1 454 #error IPLs are screwed up 455 #endif 456 #if !(IPL_SOFTCLOCK > IPL_NONE) 457 #error IPLs are screwed up 458 #endif 459 #define SOFTINT2IPLMAP \ 460 ((IPL_SOFTSERIAL << (SOFTINT_SERIAL * 4)) | \ 461 (IPL_SOFTNET << (SOFTINT_NET * 4)) | \ 462 (IPL_SOFTBIO << (SOFTINT_BIO * 4)) | \ 463 (IPL_SOFTCLOCK << (SOFTINT_CLOCK * 4))) 464 #define SOFTINT2IPL(l) ((SOFTINT2IPLMAP >> ((l) * 4)) & 0x0f) 465 466 /* 467 * This returns a mask of softint IPLs that be dispatch at <ipl> 468 * We want to shift 2 since we want a mask of <ipl> + 1. 469 * SOFTIPLMASK(IPL_NONE) = 0xfffffffe 470 * SOFTIPLMASK(IPL_SOFTCLOCK) = 0xffffffe0 471 */ 472 #define SOFTIPLMASK(ipl) ((~((2 << (ipl)) - 1)) & (15 << IPL_SOFTCLOCK)) 473 474 void softint_switch(lwp_t *, int); 475 476 void 477 softint_trigger(uintptr_t mask) 478 { 479 curcpu()->ci_softints |= mask; 480 } 481 482 void 483 softint_init_md(lwp_t *l, u_int level, uintptr_t *machdep) 484 { 485 lwp_t ** lp = &curcpu()->ci_softlwps[level]; 486 KASSERT(*lp == NULL || *lp == l); 487 *lp = l; 488 *machdep = 1 << SOFTINT2IPL(level); 489 } 490 491 void 492 dosoftints(void) 493 { 494 struct cpu_info * const ci = curcpu(); 495 const int opl = ci->ci_cpl; 496 const uint32_t softiplmask = SOFTIPLMASK(opl); 497 498 for (;;) { 499 u_int softints = ci->ci_softints & softiplmask; 500 if (softints == 0) 501 return; 502 ci->ci_cpl = IPL_HIGH; 503 #define DOSOFTINT(n) \ 504 if (softints & (1 << IPL_SOFT ## n)) { \ 505 ci->ci_softints &= ~(1 << IPL_SOFT ## n); \ 506 softint_switch(ci->ci_softlwps[SOFTINT_ ## n], \ 507 IPL_SOFT ## n); \ 508 ci->ci_cpl = opl; \ 509 continue; \ 510 } 511 DOSOFTINT(SERIAL); 512 DOSOFTINT(NET); 513 DOSOFTINT(BIO); 514 DOSOFTINT(CLOCK); 515 panic("dosoftints wtf (softints=%u?, ipl=%d)", softints, opl); 516 } 517 } 518 #endif /* __HAVE_FAST_SOFTINTS */ 519
Indexes created Wed Oct 22 13:09:56 GMT 2025