arm32_machdep.c revision 1.77
1 /* $NetBSD: arm32_machdep.c,v 1.77 2012/07/16 06:26:43 skrll 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 1.77 2012/07/16 06:26:43 skrll 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 83 void * msgbufaddr; 84 extern paddr_t msgbufphys; 85 86 int kernel_debug = 0; 87 88 /* exported variable to be filled in by the bootloaders */ 89 char *booted_kernel; 90 91 92 /* Prototypes */ 93 94 void data_abort_handler(trapframe_t *frame); 95 void prefetch_abort_handler(trapframe_t *frame); 96 extern void configure(void); 97 98 /* 99 * arm32_vector_init: 100 * 101 * Initialize the vector page, and select whether or not to 102 * relocate the vectors. 103 * 104 * NOTE: We expect the vector page to be mapped at its expected 105 * destination. 106 */ 107 void 108 arm32_vector_init(vaddr_t va, int which) 109 { 110 extern unsigned int page0[], page0_data[]; 111 unsigned int *vectors = (int *) va; 112 unsigned int *vectors_data = vectors + (page0_data - page0); 113 int vec; 114 115 /* 116 * Loop through the vectors we're taking over, and copy the 117 * vector's insn and data word. 118 */ 119 for (vec = 0; vec < ARM_NVEC; vec++) { 120 if ((which & (1 << vec)) == 0) { 121 /* Don't want to take over this vector. */ 122 continue; 123 } 124 vectors[vec] = page0[vec]; 125 vectors_data[vec] = page0_data[vec]; 126 } 127 128 /* Now sync the vectors. */ 129 cpu_icache_sync_range(va, (ARM_NVEC * 2) * sizeof(u_int)); 130 131 vector_page = va; 132 133 if (va == ARM_VECTORS_HIGH) { 134 /* 135 * Assume the MD caller knows what it's doing here, and 136 * really does want the vector page relocated. 137 * 138 * Note: This has to be done here (and not just in 139 * cpu_setup()) because the vector page needs to be 140 * accessible *before* cpu_startup() is called. 141 * Think ddb(9) ... 142 * 143 * NOTE: If the CPU control register is not readable, 144 * this will totally fail! We'll just assume that 145 * any system that has high vector support has a 146 * readable CPU control register, for now. If we 147 * ever encounter one that does not, we'll have to 148 * rethink this. 149 */ 150 cpu_control(CPU_CONTROL_VECRELOC, CPU_CONTROL_VECRELOC); 151 } 152 } 153 154 /* 155 * Debug function just to park the CPU 156 */ 157 158 void 159 halt(void) 160 { 161 while (1) 162 cpu_sleep(0); 163 } 164 165 166 /* Sync the discs and unmount the filesystems */ 167 168 void 169 bootsync(void) 170 { 171 static bool bootsyncdone = false; 172 173 if (bootsyncdone) return; 174 175 bootsyncdone = true; 176 177 /* Make sure we can still manage to do things */ 178 if (GetCPSR() & I32_bit) { 179 /* 180 * If we get here then boot has been called without RB_NOSYNC 181 * and interrupts were disabled. This means the boot() call 182 * did not come from a user process e.g. shutdown, but must 183 * have come from somewhere in the kernel. 184 */ 185 IRQenable; 186 printf("Warning IRQ's disabled during boot()\n"); 187 } 188 189 vfs_shutdown(); 190 } 191 192 /* 193 * void cpu_startup(void) 194 * 195 * Machine dependent startup code. 196 * 197 */ 198 void 199 cpu_startup(void) 200 { 201 vaddr_t minaddr; 202 vaddr_t maxaddr; 203 u_int loop; 204 char pbuf[9]; 205 206 /* Set the CPU control register */ 207 cpu_setup(boot_args); 208 209 /* Lock down zero page */ 210 vector_page_setprot(VM_PROT_READ); 211 212 /* 213 * Give pmap a chance to set up a few more things now the vm 214 * is initialised 215 */ 216 pmap_postinit(); 217 218 /* 219 * Initialize error message buffer (at end of core). 220 */ 221 222 /* msgbufphys was setup during the secondary boot strap */ 223 for (loop = 0; loop < btoc(MSGBUFSIZE); ++loop) 224 pmap_kenter_pa((vaddr_t)msgbufaddr + loop * PAGE_SIZE, 225 msgbufphys + loop * PAGE_SIZE, 226 VM_PROT_READ|VM_PROT_WRITE, 0); 227 pmap_update(pmap_kernel()); 228 initmsgbuf(msgbufaddr, round_page(MSGBUFSIZE)); 229 230 /* 231 * Identify ourselves for the msgbuf (everything printed earlier will 232 * not be buffered). 233 */ 234 printf("%s%s", copyright, version); 235 236 format_bytes(pbuf, sizeof(pbuf), arm_ptob(physmem)); 237 printf("total memory = %s\n", pbuf); 238 239 minaddr = 0; 240 241 /* 242 * Allocate a submap for physio 243 */ 244 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 245 VM_PHYS_SIZE, 0, false, NULL); 246 247 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 248 printf("avail memory = %s\n", pbuf); 249 250 curpcb = lwp_getpcb(&lwp0); 251 curpcb->pcb_flags = 0; 252 curpcb->pcb_un.un_32.pcb32_sp = 253 uvm_lwp_getuarea(&lwp0) + USPACE_SVC_STACK_TOP; 254 curpcb->pcb_tf = (struct trapframe *)curpcb->pcb_un.un_32.pcb32_sp - 1; 255 } 256 257 /* 258 * machine dependent system variables. 259 */ 260 static int 261 sysctl_machdep_booted_device(SYSCTLFN_ARGS) 262 { 263 struct sysctlnode node; 264 265 if (booted_device == NULL) 266 return (EOPNOTSUPP); 267 268 node = *rnode; 269 node.sysctl_data = booted_device->dv_xname; 270 node.sysctl_size = strlen(booted_device->dv_xname) + 1; 271 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 272 } 273 274 static int 275 sysctl_machdep_booted_kernel(SYSCTLFN_ARGS) 276 { 277 struct sysctlnode node; 278 279 if (booted_kernel == NULL || booted_kernel[0] == '\0') 280 return (EOPNOTSUPP); 281 282 node = *rnode; 283 node.sysctl_data = booted_kernel; 284 node.sysctl_size = strlen(booted_kernel) + 1; 285 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 286 } 287 288 static int 289 sysctl_machdep_powersave(SYSCTLFN_ARGS) 290 { 291 struct sysctlnode node = *rnode; 292 int error, newval; 293 294 newval = cpu_do_powersave; 295 node.sysctl_data = &newval; 296 if (cpufuncs.cf_sleep == (void *) cpufunc_nullop) 297 node.sysctl_flags &= ~CTLFLAG_READWRITE; 298 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 299 if (error || newp == NULL || newval == cpu_do_powersave) 300 return (error); 301 302 if (newval < 0 || newval > 1) 303 return (EINVAL); 304 cpu_do_powersave = newval; 305 306 return (0); 307 } 308 309 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup") 310 { 311 312 sysctl_createv(clog, 0, NULL, NULL, 313 CTLFLAG_PERMANENT, 314 CTLTYPE_NODE, "machdep", NULL, 315 NULL, 0, NULL, 0, 316 CTL_MACHDEP, CTL_EOL); 317 318 sysctl_createv(clog, 0, NULL, NULL, 319 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 320 CTLTYPE_INT, "debug", NULL, 321 NULL, 0, &kernel_debug, 0, 322 CTL_MACHDEP, CPU_DEBUG, CTL_EOL); 323 sysctl_createv(clog, 0, NULL, NULL, 324 CTLFLAG_PERMANENT, 325 CTLTYPE_STRING, "booted_device", NULL, 326 sysctl_machdep_booted_device, 0, NULL, 0, 327 CTL_MACHDEP, CPU_BOOTED_DEVICE, CTL_EOL); 328 sysctl_createv(clog, 0, NULL, NULL, 329 CTLFLAG_PERMANENT, 330 CTLTYPE_STRING, "booted_kernel", NULL, 331 sysctl_machdep_booted_kernel, 0, NULL, 0, 332 CTL_MACHDEP, CPU_BOOTED_KERNEL, CTL_EOL); 333 sysctl_createv(clog, 0, NULL, NULL, 334 CTLFLAG_PERMANENT, 335 CTLTYPE_STRUCT, "console_device", NULL, 336 sysctl_consdev, 0, NULL, sizeof(dev_t), 337 CTL_MACHDEP, CPU_CONSDEV, CTL_EOL); 338 sysctl_createv(clog, 0, NULL, NULL, 339 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 340 CTLTYPE_INT, "powersave", NULL, 341 sysctl_machdep_powersave, 0, &cpu_do_powersave, 0, 342 CTL_MACHDEP, CPU_POWERSAVE, CTL_EOL); 343 } 344 345 void 346 parse_mi_bootargs(char *args) 347 { 348 int integer; 349 350 if (get_bootconf_option(args, "single", BOOTOPT_TYPE_BOOLEAN, &integer) 351 || get_bootconf_option(args, "-s", BOOTOPT_TYPE_BOOLEAN, &integer)) 352 if (integer) 353 boothowto |= RB_SINGLE; 354 if (get_bootconf_option(args, "kdb", BOOTOPT_TYPE_BOOLEAN, &integer) 355 || get_bootconf_option(args, "-k", BOOTOPT_TYPE_BOOLEAN, &integer)) 356 if (integer) 357 boothowto |= RB_KDB; 358 if (get_bootconf_option(args, "ask", BOOTOPT_TYPE_BOOLEAN, &integer) 359 || get_bootconf_option(args, "-a", BOOTOPT_TYPE_BOOLEAN, &integer)) 360 if (integer) 361 boothowto |= RB_ASKNAME; 362 363 #ifdef PMAP_DEBUG 364 if (get_bootconf_option(args, "pmapdebug", BOOTOPT_TYPE_INT, &integer)) { 365 pmap_debug_level = integer; 366 pmap_debug(pmap_debug_level); 367 } 368 #endif /* PMAP_DEBUG */ 369 370 /* if (get_bootconf_option(args, "nbuf", BOOTOPT_TYPE_INT, &integer)) 371 bufpages = integer;*/ 372 373 #if defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE) 374 if (get_bootconf_option(args, "memorydisc", BOOTOPT_TYPE_INT, &integer) 375 || get_bootconf_option(args, "memorydisk", BOOTOPT_TYPE_INT, &integer)) { 376 md_root_size = integer; 377 md_root_size *= 1024; 378 if (md_root_size < 32*1024) 379 md_root_size = 32*1024; 380 if (md_root_size > 2048*1024) 381 md_root_size = 2048*1024; 382 } 383 #endif /* MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */ 384 385 if (get_bootconf_option(args, "quiet", BOOTOPT_TYPE_BOOLEAN, &integer) 386 || get_bootconf_option(args, "-q", BOOTOPT_TYPE_BOOLEAN, &integer)) 387 if (integer) 388 boothowto |= AB_QUIET; 389 if (get_bootconf_option(args, "verbose", BOOTOPT_TYPE_BOOLEAN, &integer) 390 || get_bootconf_option(args, "-v", BOOTOPT_TYPE_BOOLEAN, &integer)) 391 if (integer) 392 boothowto |= AB_VERBOSE; 393 } 394 395 #ifdef __HAVE_FAST_SOFTINTS 396 #if IPL_SOFTSERIAL != IPL_SOFTNET + 1 397 #error IPLs are screwed up 398 #elif IPL_SOFTNET != IPL_SOFTBIO + 1 399 #error IPLs are screwed up 400 #elif IPL_SOFTBIO != IPL_SOFTCLOCK + 1 401 #error IPLs are screwed up 402 #elif !(IPL_SOFTCLOCK > IPL_NONE) 403 #error IPLs are screwed up 404 #elif (IPL_NONE != 0) 405 #error IPLs are screwed up 406 #endif 407 408 #define SOFTINT2IPLMAP \ 409 (((IPL_SOFTSERIAL - IPL_SOFTCLOCK) << (SOFTINT_SERIAL * 4)) | \ 410 ((IPL_SOFTNET - IPL_SOFTCLOCK) << (SOFTINT_NET * 4)) | \ 411 ((IPL_SOFTBIO - IPL_SOFTCLOCK) << (SOFTINT_BIO * 4)) | \ 412 ((IPL_SOFTCLOCK - IPL_SOFTCLOCK) << (SOFTINT_CLOCK * 4))) 413 #define SOFTINT2IPL(l) ((SOFTINT2IPLMAP >> ((l) * 4)) & 0x0f) 414 415 /* 416 * This returns a mask of softint IPLs that be dispatch at <ipl> 417 * SOFTIPLMASK(IPL_NONE) = 0x0000000f 418 * SOFTIPLMASK(IPL_SOFTCLOCK) = 0x0000000e 419 * SOFTIPLMASK(IPL_SOFTBIO) = 0x0000000c 420 * SOFTIPLMASK(IPL_SOFTNET) = 0x00000008 421 * SOFTIPLMASK(IPL_SOFTSERIAL) = 0x00000000 422 */ 423 #define SOFTIPLMASK(ipl) (0x0f << (ipl)) 424 425 void softint_switch(lwp_t *, int); 426 427 void 428 softint_trigger(uintptr_t mask) 429 { 430 curcpu()->ci_softints |= mask; 431 } 432 433 void 434 softint_init_md(lwp_t *l, u_int level, uintptr_t *machdep) 435 { 436 lwp_t ** lp = &curcpu()->ci_softlwps[level]; 437 KASSERT(*lp == NULL || *lp == l); 438 *lp = l; 439 *machdep = 1 << SOFTINT2IPL(level); 440 KASSERT(level != SOFTINT_CLOCK || *machdep == (1 << (IPL_SOFTCLOCK - IPL_SOFTCLOCK))); 441 KASSERT(level != SOFTINT_BIO || *machdep == (1 << (IPL_SOFTBIO - IPL_SOFTCLOCK))); 442 KASSERT(level != SOFTINT_NET || *machdep == (1 << (IPL_SOFTNET - IPL_SOFTCLOCK))); 443 KASSERT(level != SOFTINT_SERIAL || *machdep == (1 << (IPL_SOFTSERIAL - IPL_SOFTCLOCK))); 444 } 445 446 void 447 dosoftints(void) 448 { 449 struct cpu_info * const ci = curcpu(); 450 const int opl = ci->ci_cpl; 451 const uint32_t softiplmask = SOFTIPLMASK(opl); 452 453 splhigh(); 454 for (;;) { 455 u_int softints = ci->ci_softints & softiplmask; 456 KASSERT((softints != 0) == ((ci->ci_softints >> opl) != 0)); 457 KASSERT(opl == IPL_NONE || (softints & (1 << (opl - IPL_SOFTCLOCK))) == 0); 458 if (softints == 0) { 459 splx(opl); 460 return; 461 } 462 #define DOSOFTINT(n) \ 463 if (ci->ci_softints & (1 << (IPL_SOFT ## n - IPL_SOFTCLOCK))) { \ 464 ci->ci_softints &= \ 465 ~(1 << (IPL_SOFT ## n - IPL_SOFTCLOCK)); \ 466 softint_switch(ci->ci_softlwps[SOFTINT_ ## n], \ 467 IPL_SOFT ## n); \ 468 continue; \ 469 } 470 DOSOFTINT(SERIAL); 471 DOSOFTINT(NET); 472 DOSOFTINT(BIO); 473 DOSOFTINT(CLOCK); 474 panic("dosoftints wtf (softints=%u?, ipl=%d)", softints, opl); 475 } 476 } 477 #endif /* __HAVE_FAST_SOFTINTS */ 478 479 #ifdef MODULAR 480 /* 481 * Push any modules loaded by the boot loader. 482 */ 483 void 484 module_init_md(void) 485 { 486 } 487 #endif /* MODULAR */ 488 489 int 490 mm_md_physacc(paddr_t pa, vm_prot_t prot) 491 { 492 493 return (pa < ctob(physmem)) ? 0 : EFAULT; 494 } 495
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