arm32_machdep.c revision 1.79
1 /* $NetBSD: arm32_machdep.c,v 1.79 2012/07/29 00:07:10 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 dependent 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 1.79 2012/07/29 00:07:10 matt 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 <sys/sysctl.h> 63 #include <sys/cpu.h> 64 #include <sys/module.h> 65 66 #include <uvm/uvm_extern.h> 67 68 #include <dev/cons.h> 69 #include <dev/mm.h> 70 71 #include <arm/arm32/katelib.h> 72 #include <arm/arm32/machdep.h> 73 #include <machine/bootconfig.h> 74 75 struct vm_map *phys_map = NULL; 76 77 #if defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE) 78 extern size_t md_root_size; /* Memory disc size */ 79 #endif /* MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */ 80 81 pv_addr_t kernelstack; 82 pv_addr_t abtstack; 83 pv_addr_t fiqstack; 84 pv_addr_t irqstack; 85 pv_addr_t undstack; 86 87 void * msgbufaddr; 88 extern paddr_t msgbufphys; 89 90 int kernel_debug = 0; 91 92 /* exported variable to be filled in by the bootloaders */ 93 char *booted_kernel; 94 95 96 /* Prototypes */ 97 98 void data_abort_handler(trapframe_t *frame); 99 void prefetch_abort_handler(trapframe_t *frame); 100 extern void configure(void); 101 102 /* 103 * arm32_vector_init: 104 * 105 * Initialize the vector page, and select whether or not to 106 * relocate the vectors. 107 * 108 * NOTE: We expect the vector page to be mapped at its expected 109 * destination. 110 */ 111 void 112 arm32_vector_init(vaddr_t va, int which) 113 { 114 extern unsigned int page0[], page0_data[]; 115 unsigned int *vectors = (int *) va; 116 unsigned int *vectors_data = vectors + (page0_data - page0); 117 int vec; 118 119 /* 120 * Loop through the vectors we're taking over, and copy the 121 * vector's insn and data word. 122 */ 123 for (vec = 0; vec < ARM_NVEC; vec++) { 124 if ((which & (1 << vec)) == 0) { 125 /* Don't want to take over this vector. */ 126 continue; 127 } 128 vectors[vec] = page0[vec]; 129 vectors_data[vec] = page0_data[vec]; 130 } 131 132 /* Now sync the vectors. */ 133 cpu_icache_sync_range(va, (ARM_NVEC * 2) * sizeof(u_int)); 134 135 vector_page = va; 136 137 if (va == ARM_VECTORS_HIGH) { 138 /* 139 * Assume the MD caller knows what it's doing here, and 140 * really does want the vector page relocated. 141 * 142 * Note: This has to be done here (and not just in 143 * cpu_setup()) because the vector page needs to be 144 * accessible *before* cpu_startup() is called. 145 * Think ddb(9) ... 146 * 147 * NOTE: If the CPU control register is not readable, 148 * this will totally fail! We'll just assume that 149 * any system that has high vector support has a 150 * readable CPU control register, for now. If we 151 * ever encounter one that does not, we'll have to 152 * rethink this. 153 */ 154 cpu_control(CPU_CONTROL_VECRELOC, CPU_CONTROL_VECRELOC); 155 } 156 } 157 158 /* 159 * Debug function just to park the CPU 160 */ 161 162 void 163 halt(void) 164 { 165 while (1) 166 cpu_sleep(0); 167 } 168 169 170 /* Sync the discs and unmount the filesystems */ 171 172 void 173 bootsync(void) 174 { 175 static bool bootsyncdone = false; 176 177 if (bootsyncdone) return; 178 179 bootsyncdone = true; 180 181 /* Make sure we can still manage to do things */ 182 if (GetCPSR() & I32_bit) { 183 /* 184 * If we get here then boot has been called without RB_NOSYNC 185 * and interrupts were disabled. This means the boot() call 186 * did not come from a user process e.g. shutdown, but must 187 * have come from somewhere in the kernel. 188 */ 189 IRQenable; 190 printf("Warning IRQ's disabled during boot()\n"); 191 } 192 193 vfs_shutdown(); 194 } 195 196 /* 197 * void cpu_startup(void) 198 * 199 * Machine dependent startup code. 200 * 201 */ 202 void 203 cpu_startup(void) 204 { 205 vaddr_t minaddr; 206 vaddr_t maxaddr; 207 u_int loop; 208 char pbuf[9]; 209 210 /* Set the CPU control register */ 211 cpu_setup(boot_args); 212 213 /* Lock down zero page */ 214 vector_page_setprot(VM_PROT_READ); 215 216 /* 217 * Give pmap a chance to set up a few more things now the vm 218 * is initialised 219 */ 220 pmap_postinit(); 221 222 /* 223 * Initialize error message buffer (at end of core). 224 */ 225 226 /* msgbufphys was setup during the secondary boot strap */ 227 for (loop = 0; loop < btoc(MSGBUFSIZE); ++loop) 228 pmap_kenter_pa((vaddr_t)msgbufaddr + loop * PAGE_SIZE, 229 msgbufphys + loop * PAGE_SIZE, 230 VM_PROT_READ|VM_PROT_WRITE, 0); 231 pmap_update(pmap_kernel()); 232 initmsgbuf(msgbufaddr, round_page(MSGBUFSIZE)); 233 234 /* 235 * Identify ourselves for the msgbuf (everything printed earlier will 236 * not be buffered). 237 */ 238 printf("%s%s", copyright, version); 239 240 format_bytes(pbuf, sizeof(pbuf), arm_ptob(physmem)); 241 printf("total memory = %s\n", pbuf); 242 243 minaddr = 0; 244 245 /* 246 * Allocate a submap for physio 247 */ 248 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 249 VM_PHYS_SIZE, 0, false, NULL); 250 251 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 252 printf("avail memory = %s\n", pbuf); 253 254 curpcb = lwp_getpcb(&lwp0); 255 curpcb->pcb_flags = 0; 256 curpcb->pcb_un.un_32.pcb32_sp = 257 uvm_lwp_getuarea(&lwp0) + USPACE_SVC_STACK_TOP; 258 curpcb->pcb_tf = (struct trapframe *)curpcb->pcb_un.un_32.pcb32_sp - 1; 259 } 260 261 /* 262 * machine dependent system variables. 263 */ 264 static int 265 sysctl_machdep_booted_device(SYSCTLFN_ARGS) 266 { 267 struct sysctlnode node; 268 269 if (booted_device == NULL) 270 return (EOPNOTSUPP); 271 272 node = *rnode; 273 node.sysctl_data = booted_device->dv_xname; 274 node.sysctl_size = strlen(booted_device->dv_xname) + 1; 275 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 276 } 277 278 static int 279 sysctl_machdep_booted_kernel(SYSCTLFN_ARGS) 280 { 281 struct sysctlnode node; 282 283 if (booted_kernel == NULL || booted_kernel[0] == '\0') 284 return (EOPNOTSUPP); 285 286 node = *rnode; 287 node.sysctl_data = booted_kernel; 288 node.sysctl_size = strlen(booted_kernel) + 1; 289 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 290 } 291 292 static int 293 sysctl_machdep_powersave(SYSCTLFN_ARGS) 294 { 295 struct sysctlnode node = *rnode; 296 int error, newval; 297 298 newval = cpu_do_powersave; 299 node.sysctl_data = &newval; 300 if (cpufuncs.cf_sleep == (void *) cpufunc_nullop) 301 node.sysctl_flags &= ~CTLFLAG_READWRITE; 302 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 303 if (error || newp == NULL || newval == cpu_do_powersave) 304 return (error); 305 306 if (newval < 0 || newval > 1) 307 return (EINVAL); 308 cpu_do_powersave = newval; 309 310 return (0); 311 } 312 313 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup") 314 { 315 316 sysctl_createv(clog, 0, NULL, NULL, 317 CTLFLAG_PERMANENT, 318 CTLTYPE_NODE, "machdep", NULL, 319 NULL, 0, NULL, 0, 320 CTL_MACHDEP, CTL_EOL); 321 322 sysctl_createv(clog, 0, NULL, NULL, 323 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 324 CTLTYPE_INT, "debug", NULL, 325 NULL, 0, &kernel_debug, 0, 326 CTL_MACHDEP, CPU_DEBUG, CTL_EOL); 327 sysctl_createv(clog, 0, NULL, NULL, 328 CTLFLAG_PERMANENT, 329 CTLTYPE_STRING, "booted_device", NULL, 330 sysctl_machdep_booted_device, 0, NULL, 0, 331 CTL_MACHDEP, CPU_BOOTED_DEVICE, CTL_EOL); 332 sysctl_createv(clog, 0, NULL, NULL, 333 CTLFLAG_PERMANENT, 334 CTLTYPE_STRING, "booted_kernel", NULL, 335 sysctl_machdep_booted_kernel, 0, NULL, 0, 336 CTL_MACHDEP, CPU_BOOTED_KERNEL, CTL_EOL); 337 sysctl_createv(clog, 0, NULL, NULL, 338 CTLFLAG_PERMANENT, 339 CTLTYPE_STRUCT, "console_device", NULL, 340 sysctl_consdev, 0, NULL, sizeof(dev_t), 341 CTL_MACHDEP, CPU_CONSDEV, CTL_EOL); 342 sysctl_createv(clog, 0, NULL, NULL, 343 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 344 CTLTYPE_INT, "powersave", NULL, 345 sysctl_machdep_powersave, 0, &cpu_do_powersave, 0, 346 CTL_MACHDEP, CPU_POWERSAVE, CTL_EOL); 347 } 348 349 void 350 parse_mi_bootargs(char *args) 351 { 352 int integer; 353 354 if (get_bootconf_option(args, "single", BOOTOPT_TYPE_BOOLEAN, &integer) 355 || get_bootconf_option(args, "-s", BOOTOPT_TYPE_BOOLEAN, &integer)) 356 if (integer) 357 boothowto |= RB_SINGLE; 358 if (get_bootconf_option(args, "kdb", BOOTOPT_TYPE_BOOLEAN, &integer) 359 || get_bootconf_option(args, "-k", BOOTOPT_TYPE_BOOLEAN, &integer)) 360 if (integer) 361 boothowto |= RB_KDB; 362 if (get_bootconf_option(args, "ask", BOOTOPT_TYPE_BOOLEAN, &integer) 363 || get_bootconf_option(args, "-a", BOOTOPT_TYPE_BOOLEAN, &integer)) 364 if (integer) 365 boothowto |= RB_ASKNAME; 366 367 #ifdef PMAP_DEBUG 368 if (get_bootconf_option(args, "pmapdebug", BOOTOPT_TYPE_INT, &integer)) { 369 pmap_debug_level = integer; 370 pmap_debug(pmap_debug_level); 371 } 372 #endif /* PMAP_DEBUG */ 373 374 /* if (get_bootconf_option(args, "nbuf", BOOTOPT_TYPE_INT, &integer)) 375 bufpages = integer;*/ 376 377 #if defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE) 378 if (get_bootconf_option(args, "memorydisc", BOOTOPT_TYPE_INT, &integer) 379 || get_bootconf_option(args, "memorydisk", BOOTOPT_TYPE_INT, &integer)) { 380 md_root_size = integer; 381 md_root_size *= 1024; 382 if (md_root_size < 32*1024) 383 md_root_size = 32*1024; 384 if (md_root_size > 2048*1024) 385 md_root_size = 2048*1024; 386 } 387 #endif /* MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */ 388 389 if (get_bootconf_option(args, "quiet", BOOTOPT_TYPE_BOOLEAN, &integer) 390 || get_bootconf_option(args, "-q", BOOTOPT_TYPE_BOOLEAN, &integer)) 391 if (integer) 392 boothowto |= AB_QUIET; 393 if (get_bootconf_option(args, "verbose", BOOTOPT_TYPE_BOOLEAN, &integer) 394 || get_bootconf_option(args, "-v", BOOTOPT_TYPE_BOOLEAN, &integer)) 395 if (integer) 396 boothowto |= AB_VERBOSE; 397 } 398 399 #ifdef __HAVE_FAST_SOFTINTS 400 #if IPL_SOFTSERIAL != IPL_SOFTNET + 1 401 #error IPLs are screwed up 402 #elif IPL_SOFTNET != IPL_SOFTBIO + 1 403 #error IPLs are screwed up 404 #elif IPL_SOFTBIO != IPL_SOFTCLOCK + 1 405 #error IPLs are screwed up 406 #elif !(IPL_SOFTCLOCK > IPL_NONE) 407 #error IPLs are screwed up 408 #elif (IPL_NONE != 0) 409 #error IPLs are screwed up 410 #endif 411 412 #define SOFTINT2IPLMAP \ 413 (((IPL_SOFTSERIAL - IPL_SOFTCLOCK) << (SOFTINT_SERIAL * 4)) | \ 414 ((IPL_SOFTNET - IPL_SOFTCLOCK) << (SOFTINT_NET * 4)) | \ 415 ((IPL_SOFTBIO - IPL_SOFTCLOCK) << (SOFTINT_BIO * 4)) | \ 416 ((IPL_SOFTCLOCK - IPL_SOFTCLOCK) << (SOFTINT_CLOCK * 4))) 417 #define SOFTINT2IPL(l) ((SOFTINT2IPLMAP >> ((l) * 4)) & 0x0f) 418 419 /* 420 * This returns a mask of softint IPLs that be dispatch at <ipl> 421 * SOFTIPLMASK(IPL_NONE) = 0x0000000f 422 * SOFTIPLMASK(IPL_SOFTCLOCK) = 0x0000000e 423 * SOFTIPLMASK(IPL_SOFTBIO) = 0x0000000c 424 * SOFTIPLMASK(IPL_SOFTNET) = 0x00000008 425 * SOFTIPLMASK(IPL_SOFTSERIAL) = 0x00000000 426 */ 427 #define SOFTIPLMASK(ipl) ((0x0f << (ipl)) & 0x0f) 428 429 void softint_switch(lwp_t *, int); 430 431 void 432 softint_trigger(uintptr_t mask) 433 { 434 curcpu()->ci_softints |= mask; 435 } 436 437 void 438 softint_init_md(lwp_t *l, u_int level, uintptr_t *machdep) 439 { 440 lwp_t ** lp = &curcpu()->ci_softlwps[level]; 441 KASSERT(*lp == NULL || *lp == l); 442 *lp = l; 443 *machdep = 1 << SOFTINT2IPL(level); 444 KASSERT(level != SOFTINT_CLOCK || *machdep == (1 << (IPL_SOFTCLOCK - IPL_SOFTCLOCK))); 445 KASSERT(level != SOFTINT_BIO || *machdep == (1 << (IPL_SOFTBIO - IPL_SOFTCLOCK))); 446 KASSERT(level != SOFTINT_NET || *machdep == (1 << (IPL_SOFTNET - IPL_SOFTCLOCK))); 447 KASSERT(level != SOFTINT_SERIAL || *machdep == (1 << (IPL_SOFTSERIAL - IPL_SOFTCLOCK))); 448 } 449 450 void 451 dosoftints(void) 452 { 453 struct cpu_info * const ci = curcpu(); 454 const int opl = ci->ci_cpl; 455 const uint32_t softiplmask = SOFTIPLMASK(opl); 456 457 splhigh(); 458 for (;;) { 459 u_int softints = ci->ci_softints & softiplmask; 460 KASSERT((softints != 0) == ((ci->ci_softints >> opl) != 0)); 461 KASSERT(opl == IPL_NONE || (softints & (1 << (opl - IPL_SOFTCLOCK))) == 0); 462 if (softints == 0) { 463 splx(opl); 464 return; 465 } 466 #define DOSOFTINT(n) \ 467 if (ci->ci_softints & (1 << (IPL_SOFT ## n - IPL_SOFTCLOCK))) { \ 468 ci->ci_softints &= \ 469 ~(1 << (IPL_SOFT ## n - IPL_SOFTCLOCK)); \ 470 softint_switch(ci->ci_softlwps[SOFTINT_ ## n], \ 471 IPL_SOFT ## n); \ 472 continue; \ 473 } 474 DOSOFTINT(SERIAL); 475 DOSOFTINT(NET); 476 DOSOFTINT(BIO); 477 DOSOFTINT(CLOCK); 478 panic("dosoftints wtf (softints=%u?, ipl=%d)", softints, opl); 479 } 480 } 481 #endif /* __HAVE_FAST_SOFTINTS */ 482 483 #ifdef MODULAR 484 /* 485 * Push any modules loaded by the boot loader. 486 */ 487 void 488 module_init_md(void) 489 { 490 } 491 #endif /* MODULAR */ 492 493 int 494 mm_md_physacc(paddr_t pa, vm_prot_t prot) 495 { 496 497 return (pa < ctob(physmem)) ? 0 : EFAULT; 498 } 499
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