arm32_machdep.c revision 1.73.2.1
1 /* $NetBSD: arm32_machdep.c,v 1.73.2.1 2010/03/18 04:36:47 rmind 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 1.73.2.1 2010/03/18 04:36:47 rmind Exp $"); 46 47 #include "opt_modular.h" 48 #include "opt_md.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/kauth.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 #include <sys/module.h> 66 67 #include <dev/cons.h> 68 #include <dev/mm.h> 69 70 #include <arm/arm32/katelib.h> 71 #include <arm/arm32/machdep.h> 72 #include <machine/bootconfig.h> 73 74 #include "md.h" 75 76 struct vm_map *phys_map = NULL; 77 78 #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE) 79 extern size_t md_root_size; /* Memory disc size */ 80 #endif /* NMD && MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */ 81 82 pv_addr_t kernelstack; 83 84 void * msgbufaddr; 85 extern paddr_t msgbufphys; 86 87 int kernel_debug = 0; 88 89 /* exported variable to be filled in by the bootloaders */ 90 char *booted_kernel; 91 92 93 /* Prototypes */ 94 95 void data_abort_handler(trapframe_t *frame); 96 void prefetch_abort_handler(trapframe_t *frame); 97 extern void configure(void); 98 99 /* 100 * arm32_vector_init: 101 * 102 * Initialize the vector page, and select whether or not to 103 * relocate the vectors. 104 * 105 * NOTE: We expect the vector page to be mapped at its expected 106 * destination. 107 */ 108 void 109 arm32_vector_init(vaddr_t va, int which) 110 { 111 extern unsigned int page0[], page0_data[]; 112 unsigned int *vectors = (int *) va; 113 unsigned int *vectors_data = vectors + (page0_data - page0); 114 int vec; 115 116 /* 117 * Loop through the vectors we're taking over, and copy the 118 * vector's insn and data word. 119 */ 120 for (vec = 0; vec < ARM_NVEC; vec++) { 121 if ((which & (1 << vec)) == 0) { 122 /* Don't want to take over this vector. */ 123 continue; 124 } 125 vectors[vec] = page0[vec]; 126 vectors_data[vec] = page0_data[vec]; 127 } 128 129 /* Now sync the vectors. */ 130 cpu_icache_sync_range(va, (ARM_NVEC * 2) * sizeof(u_int)); 131 132 vector_page = va; 133 134 if (va == ARM_VECTORS_HIGH) { 135 /* 136 * Assume the MD caller knows what it's doing here, and 137 * really does want the vector page relocated. 138 * 139 * Note: This has to be done here (and not just in 140 * cpu_setup()) because the vector page needs to be 141 * accessible *before* cpu_startup() is called. 142 * Think ddb(9) ... 143 * 144 * NOTE: If the CPU control register is not readable, 145 * this will totally fail! We'll just assume that 146 * any system that has high vector support has a 147 * readable CPU control register, for now. If we 148 * ever encounter one that does not, we'll have to 149 * rethink this. 150 */ 151 cpu_control(CPU_CONTROL_VECRELOC, CPU_CONTROL_VECRELOC); 152 } 153 } 154 155 /* 156 * Debug function just to park the CPU 157 */ 158 159 void 160 halt(void) 161 { 162 while (1) 163 cpu_sleep(0); 164 } 165 166 167 /* Sync the discs and unmount the filesystems */ 168 169 void 170 bootsync(void) 171 { 172 static bool bootsyncdone = false; 173 174 if (bootsyncdone) return; 175 176 bootsyncdone = true; 177 178 /* Make sure we can still manage to do things */ 179 if (GetCPSR() & I32_bit) { 180 /* 181 * If we get here then boot has been called without RB_NOSYNC 182 * and interrupts were disabled. This means the boot() call 183 * did not come from a user process e.g. shutdown, but must 184 * have come from somewhere in the kernel. 185 */ 186 IRQenable; 187 printf("Warning IRQ's disabled during boot()\n"); 188 } 189 190 vfs_shutdown(); 191 } 192 193 /* 194 * void cpu_startup(void) 195 * 196 * Machine dependant startup code. 197 * 198 */ 199 void 200 cpu_startup(void) 201 { 202 vaddr_t minaddr; 203 vaddr_t maxaddr; 204 u_int loop; 205 char pbuf[9]; 206 207 /* Set the CPU control register */ 208 cpu_setup(boot_args); 209 210 /* Lock down zero page */ 211 vector_page_setprot(VM_PROT_READ); 212 213 /* 214 * Give pmap a chance to set up a few more things now the vm 215 * is initialised 216 */ 217 pmap_postinit(); 218 219 /* 220 * Initialize error message buffer (at end of core). 221 */ 222 223 /* msgbufphys was setup during the secondary boot strap */ 224 for (loop = 0; loop < btoc(MSGBUFSIZE); ++loop) 225 pmap_kenter_pa((vaddr_t)msgbufaddr + loop * PAGE_SIZE, 226 msgbufphys + loop * PAGE_SIZE, 227 VM_PROT_READ|VM_PROT_WRITE, 0); 228 pmap_update(pmap_kernel()); 229 initmsgbuf(msgbufaddr, round_page(MSGBUFSIZE)); 230 231 /* 232 * Identify ourselves for the msgbuf (everything printed earlier will 233 * not be buffered). 234 */ 235 printf("%s%s", copyright, version); 236 237 format_bytes(pbuf, sizeof(pbuf), arm_ptob(physmem)); 238 printf("total memory = %s\n", pbuf); 239 240 minaddr = 0; 241 242 /* 243 * Allocate a submap for physio 244 */ 245 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 246 VM_PHYS_SIZE, 0, false, NULL); 247 248 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 249 printf("avail memory = %s\n", pbuf); 250 251 curpcb = lwp_getpcb(&lwp0); 252 curpcb->pcb_flags = 0; 253 curpcb->pcb_un.un_32.pcb32_sp = 254 uvm_lwp_getuarea(&lwp0) + USPACE_SVC_STACK_TOP; 255 curpcb->pcb_tf = (struct trapframe *)curpcb->pcb_un.un_32.pcb32_sp - 1; 256 } 257 258 /* 259 * machine dependent system variables. 260 */ 261 static int 262 sysctl_machdep_booted_device(SYSCTLFN_ARGS) 263 { 264 struct sysctlnode node; 265 266 if (booted_device == NULL) 267 return (EOPNOTSUPP); 268 269 node = *rnode; 270 node.sysctl_data = booted_device->dv_xname; 271 node.sysctl_size = strlen(booted_device->dv_xname) + 1; 272 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 273 } 274 275 static int 276 sysctl_machdep_booted_kernel(SYSCTLFN_ARGS) 277 { 278 struct sysctlnode node; 279 280 if (booted_kernel == NULL || booted_kernel[0] == '\0') 281 return (EOPNOTSUPP); 282 283 node = *rnode; 284 node.sysctl_data = booted_kernel; 285 node.sysctl_size = strlen(booted_kernel) + 1; 286 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 287 } 288 289 static int 290 sysctl_machdep_powersave(SYSCTLFN_ARGS) 291 { 292 struct sysctlnode node = *rnode; 293 int error, newval; 294 295 newval = cpu_do_powersave; 296 node.sysctl_data = &newval; 297 if (cpufuncs.cf_sleep == (void *) cpufunc_nullop) 298 node.sysctl_flags &= ~CTLFLAG_READWRITE; 299 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 300 if (error || newp == NULL || newval == cpu_do_powersave) 301 return (error); 302 303 if (newval < 0 || newval > 1) 304 return (EINVAL); 305 cpu_do_powersave = newval; 306 307 return (0); 308 } 309 310 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup") 311 { 312 313 sysctl_createv(clog, 0, NULL, NULL, 314 CTLFLAG_PERMANENT, 315 CTLTYPE_NODE, "machdep", NULL, 316 NULL, 0, NULL, 0, 317 CTL_MACHDEP, CTL_EOL); 318 319 sysctl_createv(clog, 0, NULL, NULL, 320 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 321 CTLTYPE_INT, "debug", NULL, 322 NULL, 0, &kernel_debug, 0, 323 CTL_MACHDEP, CPU_DEBUG, CTL_EOL); 324 sysctl_createv(clog, 0, NULL, NULL, 325 CTLFLAG_PERMANENT, 326 CTLTYPE_STRING, "booted_device", NULL, 327 sysctl_machdep_booted_device, 0, NULL, 0, 328 CTL_MACHDEP, CPU_BOOTED_DEVICE, CTL_EOL); 329 sysctl_createv(clog, 0, NULL, NULL, 330 CTLFLAG_PERMANENT, 331 CTLTYPE_STRING, "booted_kernel", NULL, 332 sysctl_machdep_booted_kernel, 0, NULL, 0, 333 CTL_MACHDEP, CPU_BOOTED_KERNEL, CTL_EOL); 334 sysctl_createv(clog, 0, NULL, NULL, 335 CTLFLAG_PERMANENT, 336 CTLTYPE_STRUCT, "console_device", NULL, 337 sysctl_consdev, 0, NULL, sizeof(dev_t), 338 CTL_MACHDEP, CPU_CONSDEV, CTL_EOL); 339 sysctl_createv(clog, 0, NULL, NULL, 340 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 341 CTLTYPE_INT, "powersave", NULL, 342 sysctl_machdep_powersave, 0, &cpu_do_powersave, 0, 343 CTL_MACHDEP, CPU_POWERSAVE, CTL_EOL); 344 } 345 346 void 347 parse_mi_bootargs(char *args) 348 { 349 int integer; 350 351 if (get_bootconf_option(args, "single", BOOTOPT_TYPE_BOOLEAN, &integer) 352 || get_bootconf_option(args, "-s", BOOTOPT_TYPE_BOOLEAN, &integer)) 353 if (integer) 354 boothowto |= RB_SINGLE; 355 if (get_bootconf_option(args, "kdb", BOOTOPT_TYPE_BOOLEAN, &integer) 356 || get_bootconf_option(args, "-k", BOOTOPT_TYPE_BOOLEAN, &integer)) 357 if (integer) 358 boothowto |= RB_KDB; 359 if (get_bootconf_option(args, "ask", BOOTOPT_TYPE_BOOLEAN, &integer) 360 || get_bootconf_option(args, "-a", BOOTOPT_TYPE_BOOLEAN, &integer)) 361 if (integer) 362 boothowto |= RB_ASKNAME; 363 364 #ifdef PMAP_DEBUG 365 if (get_bootconf_option(args, "pmapdebug", BOOTOPT_TYPE_INT, &integer)) { 366 pmap_debug_level = integer; 367 pmap_debug(pmap_debug_level); 368 } 369 #endif /* PMAP_DEBUG */ 370 371 /* if (get_bootconf_option(args, "nbuf", BOOTOPT_TYPE_INT, &integer)) 372 bufpages = integer;*/ 373 374 #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE) 375 if (get_bootconf_option(args, "memorydisc", BOOTOPT_TYPE_INT, &integer) 376 || get_bootconf_option(args, "memorydisk", BOOTOPT_TYPE_INT, &integer)) { 377 md_root_size = integer; 378 md_root_size *= 1024; 379 if (md_root_size < 32*1024) 380 md_root_size = 32*1024; 381 if (md_root_size > 2048*1024) 382 md_root_size = 2048*1024; 383 } 384 #endif /* NMD && MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */ 385 386 if (get_bootconf_option(args, "quiet", BOOTOPT_TYPE_BOOLEAN, &integer) 387 || get_bootconf_option(args, "-q", BOOTOPT_TYPE_BOOLEAN, &integer)) 388 if (integer) 389 boothowto |= AB_QUIET; 390 if (get_bootconf_option(args, "verbose", BOOTOPT_TYPE_BOOLEAN, &integer) 391 || get_bootconf_option(args, "-v", BOOTOPT_TYPE_BOOLEAN, &integer)) 392 if (integer) 393 boothowto |= AB_VERBOSE; 394 } 395 396 #ifdef __HAVE_FAST_SOFTINTS 397 #if IPL_SOFTSERIAL != IPL_SOFTNET + 1 398 #error IPLs are screwed up 399 #elif IPL_SOFTNET != IPL_SOFTBIO + 1 400 #error IPLs are screwed up 401 #elif IPL_SOFTBIO != IPL_SOFTCLOCK + 1 402 #error IPLs are screwed up 403 #elif !(IPL_SOFTCLOCK > IPL_NONE) 404 #error IPLs are screwed up 405 #elif (IPL_NONE != 0) 406 #error IPLs are screwed up 407 #endif 408 409 #define SOFTINT2IPLMAP \ 410 (((IPL_SOFTSERIAL - IPL_SOFTCLOCK) << (SOFTINT_SERIAL * 4)) | \ 411 ((IPL_SOFTNET - IPL_SOFTCLOCK) << (SOFTINT_NET * 4)) | \ 412 ((IPL_SOFTBIO - IPL_SOFTCLOCK) << (SOFTINT_BIO * 4)) | \ 413 ((IPL_SOFTCLOCK - IPL_SOFTCLOCK) << (SOFTINT_CLOCK * 4))) 414 #define SOFTINT2IPL(l) ((SOFTINT2IPLMAP >> ((l) * 4)) & 0x0f) 415 416 /* 417 * This returns a mask of softint IPLs that be dispatch at <ipl> 418 * SOFTIPLMASK(IPL_NONE) = 0x0000000f 419 * SOFTIPLMASK(IPL_SOFTCLOCK) = 0x0000000e 420 * SOFTIPLMASK(IPL_SOFTBIO) = 0x0000000c 421 * SOFTIPLMASK(IPL_SOFTNET) = 0x00000008 422 * SOFTIPLMASK(IPL_SOFTSERIAL) = 0x00000000 423 */ 424 #define SOFTIPLMASK(ipl) (0x0f << (ipl)) 425 426 void softint_switch(lwp_t *, int); 427 428 void 429 softint_trigger(uintptr_t mask) 430 { 431 curcpu()->ci_softints |= mask; 432 } 433 434 void 435 softint_init_md(lwp_t *l, u_int level, uintptr_t *machdep) 436 { 437 lwp_t ** lp = &curcpu()->ci_softlwps[level]; 438 KASSERT(*lp == NULL || *lp == l); 439 *lp = l; 440 *machdep = 1 << SOFTINT2IPL(level); 441 KASSERT(level != SOFTINT_CLOCK || *machdep == (1 << (IPL_SOFTCLOCK - IPL_SOFTCLOCK))); 442 KASSERT(level != SOFTINT_BIO || *machdep == (1 << (IPL_SOFTBIO - IPL_SOFTCLOCK))); 443 KASSERT(level != SOFTINT_NET || *machdep == (1 << (IPL_SOFTNET - IPL_SOFTCLOCK))); 444 KASSERT(level != SOFTINT_SERIAL || *machdep == (1 << (IPL_SOFTSERIAL - IPL_SOFTCLOCK))); 445 } 446 447 void 448 dosoftints(void) 449 { 450 struct cpu_info * const ci = curcpu(); 451 const int opl = ci->ci_cpl; 452 const uint32_t softiplmask = SOFTIPLMASK(opl); 453 454 for (;;) { 455 u_int softints = ci->ci_softints & softiplmask; 456 KASSERT((softints != 0) == ((ci->ci_softints >> opl) != 0)); 457 if (softints == 0) 458 return; 459 ci->ci_cpl = IPL_HIGH; 460 #define DOSOFTINT(n) \ 461 if (softints & (1 << (IPL_SOFT ## n - IPL_SOFTCLOCK))) { \ 462 ci->ci_softints &= \ 463 ~(1 << (IPL_SOFT ## n - IPL_SOFTCLOCK)); \ 464 softint_switch(ci->ci_softlwps[SOFTINT_ ## n], \ 465 IPL_SOFT ## n); \ 466 ci->ci_cpl = opl; \ 467 continue; \ 468 } 469 DOSOFTINT(SERIAL); 470 DOSOFTINT(NET); 471 DOSOFTINT(BIO); 472 DOSOFTINT(CLOCK); 473 panic("dosoftints wtf (softints=%u?, ipl=%d)", softints, opl); 474 } 475 } 476 #endif /* __HAVE_FAST_SOFTINTS */ 477 478 #ifdef MODULAR 479 /* 480 * Push any modules loaded by the boot loader. 481 */ 482 void 483 module_init_md(void) 484 { 485 } 486 #endif /* MODULAR */ 487 488 int 489 mm_md_physacc(paddr_t pa, vm_prot_t prot) 490 { 491 492 if (pa < ctob(physmem)) 493 return 0; 494 495 return kauth_authorize_machdep(kauth_cred_get(), 496 KAUTH_MACHDEP_UNMANAGEDMEM, NULL, NULL, NULL, NULL); 497 } 498
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