arm32_machdep.c revision 1.58
1 /* $NetBSD: arm32_machdep.c,v 1.58 2008/08/07 04:17:25 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 1.58 2008/08/07 04:17:25 matt 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 *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 .ci_cpl = IPL_HIGH, 92 #ifndef PROCESS_ID_IS_CURLWP 93 .ci_curlwp = &lwp0, 94 #endif 95 }; 96 97 void * msgbufaddr; 98 extern paddr_t msgbufphys; 99 100 int kernel_debug = 0; 101 102 struct user *proc0paddr; 103 104 /* exported variable to be filled in by the bootloaders */ 105 char *booted_kernel; 106 107 108 /* Prototypes */ 109 110 void data_abort_handler __P((trapframe_t *frame)); 111 void prefetch_abort_handler __P((trapframe_t *frame)); 112 extern void configure __P((void)); 113 114 /* 115 * arm32_vector_init: 116 * 117 * Initialize the vector page, and select whether or not to 118 * relocate the vectors. 119 * 120 * NOTE: We expect the vector page to be mapped at its expected 121 * destination. 122 */ 123 void 124 arm32_vector_init(vaddr_t va, int which) 125 { 126 extern unsigned int page0[], page0_data[]; 127 unsigned int *vectors = (int *) va; 128 unsigned int *vectors_data = vectors + (page0_data - page0); 129 int vec; 130 131 /* 132 * Loop through the vectors we're taking over, and copy the 133 * vector's insn and data word. 134 */ 135 for (vec = 0; vec < ARM_NVEC; vec++) { 136 if ((which & (1 << vec)) == 0) { 137 /* Don't want to take over this vector. */ 138 continue; 139 } 140 vectors[vec] = page0[vec]; 141 vectors_data[vec] = page0_data[vec]; 142 } 143 144 /* Now sync the vectors. */ 145 cpu_icache_sync_range(va, (ARM_NVEC * 2) * sizeof(u_int)); 146 147 vector_page = va; 148 149 if (va == ARM_VECTORS_HIGH) { 150 /* 151 * Assume the MD caller knows what it's doing here, and 152 * really does want the vector page relocated. 153 * 154 * Note: This has to be done here (and not just in 155 * cpu_setup()) because the vector page needs to be 156 * accessible *before* cpu_startup() is called. 157 * Think ddb(9) ... 158 * 159 * NOTE: If the CPU control register is not readable, 160 * this will totally fail! We'll just assume that 161 * any system that has high vector support has a 162 * readable CPU control register, for now. If we 163 * ever encounter one that does not, we'll have to 164 * rethink this. 165 */ 166 cpu_control(CPU_CONTROL_VECRELOC, CPU_CONTROL_VECRELOC); 167 } 168 } 169 170 /* 171 * Debug function just to park the CPU 172 */ 173 174 void 175 halt() 176 { 177 while (1) 178 cpu_sleep(0); 179 } 180 181 182 /* Sync the discs and unmount the filesystems */ 183 184 void 185 bootsync(void) 186 { 187 static bool bootsyncdone = false; 188 189 if (bootsyncdone) return; 190 191 bootsyncdone = true; 192 193 /* Make sure we can still manage to do things */ 194 if (GetCPSR() & I32_bit) { 195 /* 196 * If we get here then boot has been called without RB_NOSYNC 197 * and interrupts were disabled. This means the boot() call 198 * did not come from a user process e.g. shutdown, but must 199 * have come from somewhere in the kernel. 200 */ 201 IRQenable; 202 printf("Warning IRQ's disabled during boot()\n"); 203 } 204 205 vfs_shutdown(); 206 } 207 208 /* 209 * void cpu_startup(void) 210 * 211 * Machine dependant startup code. 212 * 213 */ 214 void 215 cpu_startup(void) 216 { 217 vaddr_t minaddr; 218 vaddr_t maxaddr; 219 u_int loop; 220 char pbuf[9]; 221 222 /* Set the CPU control register */ 223 cpu_setup(boot_args); 224 225 /* Lock down zero page */ 226 vector_page_setprot(VM_PROT_READ); 227 228 /* 229 * Give pmap a chance to set up a few more things now the vm 230 * is initialised 231 */ 232 pmap_postinit(); 233 234 /* 235 * Initialize error message buffer (at end of core). 236 */ 237 238 /* msgbufphys was setup during the secondary boot strap */ 239 for (loop = 0; loop < btoc(MSGBUFSIZE); ++loop) 240 pmap_kenter_pa((vaddr_t)msgbufaddr + loop * PAGE_SIZE, 241 msgbufphys + loop * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE); 242 pmap_update(pmap_kernel()); 243 initmsgbuf(msgbufaddr, round_page(MSGBUFSIZE)); 244 245 /* 246 * Identify ourselves for the msgbuf (everything printed earlier will 247 * not be buffered). 248 */ 249 printf("%s%s", copyright, version); 250 251 format_bytes(pbuf, sizeof(pbuf), arm_ptob(physmem)); 252 printf("total memory = %s\n", pbuf); 253 254 minaddr = 0; 255 256 /* 257 * Allocate a submap for physio 258 */ 259 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 260 VM_PHYS_SIZE, 0, false, NULL); 261 262 /* 263 * Finally, allocate mbuf cluster submap. 264 */ 265 mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 266 nmbclusters * mclbytes, VM_MAP_INTRSAFE, 267 false, NULL); 268 269 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 270 printf("avail memory = %s\n", pbuf); 271 272 curpcb = &lwp0.l_addr->u_pcb; 273 curpcb->pcb_flags = 0; 274 curpcb->pcb_un.un_32.pcb32_sp = (u_int)lwp0.l_addr + 275 USPACE_SVC_STACK_TOP; 276 277 curpcb->pcb_tf = (struct trapframe *)curpcb->pcb_un.un_32.pcb32_sp - 1; 278 } 279 280 /* 281 * machine dependent system variables. 282 */ 283 static int 284 sysctl_machdep_booted_device(SYSCTLFN_ARGS) 285 { 286 struct sysctlnode node; 287 288 if (booted_device == NULL) 289 return (EOPNOTSUPP); 290 291 node = *rnode; 292 node.sysctl_data = booted_device->dv_xname; 293 node.sysctl_size = strlen(booted_device->dv_xname) + 1; 294 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 295 } 296 297 static int 298 sysctl_machdep_booted_kernel(SYSCTLFN_ARGS) 299 { 300 struct sysctlnode node; 301 302 if (booted_kernel == NULL || booted_kernel[0] == '\0') 303 return (EOPNOTSUPP); 304 305 node = *rnode; 306 node.sysctl_data = booted_kernel; 307 node.sysctl_size = strlen(booted_kernel) + 1; 308 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 309 } 310 311 static int 312 sysctl_machdep_powersave(SYSCTLFN_ARGS) 313 { 314 struct sysctlnode node = *rnode; 315 int error, newval; 316 317 newval = cpu_do_powersave; 318 node.sysctl_data = &newval; 319 if (cpufuncs.cf_sleep == (void *) cpufunc_nullop) 320 node.sysctl_flags &= ~CTLFLAG_READWRITE; 321 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 322 if (error || newp == NULL || newval == cpu_do_powersave) 323 return (error); 324 325 if (newval < 0 || newval > 1) 326 return (EINVAL); 327 cpu_do_powersave = newval; 328 329 return (0); 330 } 331 332 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup") 333 { 334 335 sysctl_createv(clog, 0, NULL, NULL, 336 CTLFLAG_PERMANENT, 337 CTLTYPE_NODE, "machdep", NULL, 338 NULL, 0, NULL, 0, 339 CTL_MACHDEP, CTL_EOL); 340 341 sysctl_createv(clog, 0, NULL, NULL, 342 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 343 CTLTYPE_INT, "debug", NULL, 344 NULL, 0, &kernel_debug, 0, 345 CTL_MACHDEP, CPU_DEBUG, CTL_EOL); 346 sysctl_createv(clog, 0, NULL, NULL, 347 CTLFLAG_PERMANENT, 348 CTLTYPE_STRING, "booted_device", NULL, 349 sysctl_machdep_booted_device, 0, NULL, 0, 350 CTL_MACHDEP, CPU_BOOTED_DEVICE, CTL_EOL); 351 sysctl_createv(clog, 0, NULL, NULL, 352 CTLFLAG_PERMANENT, 353 CTLTYPE_STRING, "booted_kernel", NULL, 354 sysctl_machdep_booted_kernel, 0, NULL, 0, 355 CTL_MACHDEP, CPU_BOOTED_KERNEL, CTL_EOL); 356 sysctl_createv(clog, 0, NULL, NULL, 357 CTLFLAG_PERMANENT, 358 CTLTYPE_STRUCT, "console_device", NULL, 359 sysctl_consdev, 0, NULL, sizeof(dev_t), 360 CTL_MACHDEP, CPU_CONSDEV, CTL_EOL); 361 sysctl_createv(clog, 0, NULL, NULL, 362 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 363 CTLTYPE_INT, "powersave", NULL, 364 sysctl_machdep_powersave, 0, &cpu_do_powersave, 0, 365 CTL_MACHDEP, CPU_POWERSAVE, CTL_EOL); 366 } 367 368 void 369 parse_mi_bootargs(args) 370 char *args; 371 { 372 int integer; 373 374 if (get_bootconf_option(args, "single", BOOTOPT_TYPE_BOOLEAN, &integer) 375 || get_bootconf_option(args, "-s", BOOTOPT_TYPE_BOOLEAN, &integer)) 376 if (integer) 377 boothowto |= RB_SINGLE; 378 if (get_bootconf_option(args, "kdb", BOOTOPT_TYPE_BOOLEAN, &integer) 379 || get_bootconf_option(args, "-k", BOOTOPT_TYPE_BOOLEAN, &integer)) 380 if (integer) 381 boothowto |= RB_KDB; 382 if (get_bootconf_option(args, "ask", BOOTOPT_TYPE_BOOLEAN, &integer) 383 || get_bootconf_option(args, "-a", BOOTOPT_TYPE_BOOLEAN, &integer)) 384 if (integer) 385 boothowto |= RB_ASKNAME; 386 387 #ifdef PMAP_DEBUG 388 if (get_bootconf_option(args, "pmapdebug", BOOTOPT_TYPE_INT, &integer)) { 389 pmap_debug_level = integer; 390 pmap_debug(pmap_debug_level); 391 } 392 #endif /* PMAP_DEBUG */ 393 394 /* if (get_bootconf_option(args, "nbuf", BOOTOPT_TYPE_INT, &integer)) 395 bufpages = integer;*/ 396 397 #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE) 398 if (get_bootconf_option(args, "memorydisc", BOOTOPT_TYPE_INT, &integer) 399 || get_bootconf_option(args, "memorydisk", BOOTOPT_TYPE_INT, &integer)) { 400 md_root_size = integer; 401 md_root_size *= 1024; 402 if (md_root_size < 32*1024) 403 md_root_size = 32*1024; 404 if (md_root_size > 2048*1024) 405 md_root_size = 2048*1024; 406 } 407 #endif /* NMD && MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */ 408 409 if (get_bootconf_option(args, "quiet", BOOTOPT_TYPE_BOOLEAN, &integer) 410 || get_bootconf_option(args, "-q", BOOTOPT_TYPE_BOOLEAN, &integer)) 411 if (integer) 412 boothowto |= AB_QUIET; 413 if (get_bootconf_option(args, "verbose", BOOTOPT_TYPE_BOOLEAN, &integer) 414 || get_bootconf_option(args, "-v", BOOTOPT_TYPE_BOOLEAN, &integer)) 415 if (integer) 416 boothowto |= AB_VERBOSE; 417 } 418 419 void 420 cpu_need_resched(struct cpu_info *ci, int flags) 421 { 422 bool immed = (flags & RESCHED_IMMED) != 0; 423 424 if (ci->ci_want_resched && !immed) 425 return; 426 427 ci->ci_want_resched = 1; 428 if (curlwp != ci->ci_data.cpu_idlelwp) 429 setsoftast(); 430 } 431 432 bool 433 cpu_intr_p(void) 434 { 435 return curcpu()->ci_intr_depth != 0; 436 } 437 438 #ifdef __HAVE_FAST_SOFTINTS 439 #if IPL_SOFTSERIAL != IPL_SOFTNET + 1 440 #error IPLs are screwed up 441 #elif IPL_SOFTNET != IPL_SOFTBIO + 1 442 #error IPLs are screwed up 443 #elif IPL_SOFTBIO != IPL_SOFTCLOCK + 1 444 #error IPLs are screwed up 445 #elif !(IPL_SOFTCLOCK > IPL_NONE) 446 #error IPLs are screwed up 447 #elif (IPL_NONE != 0) 448 #error IPLs are screwed up 449 #endif 450 451 #define SOFTINT2IPLMAP \ 452 (((IPL_SOFTSERIAL - IPL_SOFTCLOCK) << (SOFTINT_SERIAL * 4)) | \ 453 ((IPL_SOFTNET - IPL_SOFTCLOCK) << (SOFTINT_NET * 4)) | \ 454 ((IPL_SOFTBIO - IPL_SOFTCLOCK) << (SOFTINT_BIO * 4)) | \ 455 ((IPL_SOFTCLOCK - IPL_SOFTCLOCK) << (SOFTINT_CLOCK * 4))) 456 #define SOFTINT2IPL(l) ((SOFTINT2IPLMAP >> ((l) * 4)) & 0x0f) 457 458 /* 459 * This returns a mask of softint IPLs that be dispatch at <ipl> 460 * SOFTIPLMASK(IPL_NONE) = 0xffffffff 461 * SOFTIPLMASK(IPL_SOFTCLOCK) = 0xfffffff0 462 */ 463 #define SOFTIPLMASK(ipl) (~0 << (ipl)) 464 465 void softint_switch(lwp_t *, int); 466 467 void 468 softint_trigger(uintptr_t mask) 469 { 470 curcpu()->ci_softints |= mask; 471 } 472 473 void 474 softint_init_md(lwp_t *l, u_int level, uintptr_t *machdep) 475 { 476 lwp_t ** lp = &curcpu()->ci_softlwps[level]; 477 KASSERT(*lp == NULL || *lp == l); 478 *lp = l; 479 *machdep = 1 << SOFTINT2IPL(level); 480 } 481 482 void 483 dosoftints(void) 484 { 485 struct cpu_info * const ci = curcpu(); 486 const int opl = ci->ci_cpl; 487 const uint32_t softiplmask = SOFTIPLMASK(opl); 488 489 for (;;) { 490 u_int softints = ci->ci_softints & softiplmask; 491 if (softints == 0) 492 return; 493 ci->ci_cpl = IPL_HIGH; 494 #define DOSOFTINT(n) \ 495 if (softints & (1 << (IPL_SOFT ## n - IPL_SOFTCLOCK))) { \ 496 ci->ci_softints &= \ 497 ~(1 << (IPL_SOFT ## n - IPL_SOFTCLOCK)); \ 498 softint_switch(ci->ci_softlwps[SOFTINT_ ## n], \ 499 IPL_SOFT ## n); \ 500 ci->ci_cpl = opl; \ 501 continue; \ 502 } 503 DOSOFTINT(SERIAL); 504 DOSOFTINT(NET); 505 DOSOFTINT(BIO); 506 DOSOFTINT(CLOCK); 507 panic("dosoftints wtf (softints=%u?, ipl=%d)", softints, opl); 508 } 509 } 510 #endif /* __HAVE_FAST_SOFTINTS */ 511
Indexes created Tue Sep 30 20:09:53 GMT 2025