arm32_machdep.c revision 1.75
1 /* $NetBSD: arm32_machdep.c,v 1.75 2011/06/12 03:35:39 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 1.75 2011/06/12 03:35:39 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 struct vm_map *phys_map = NULL; 75 76 #if defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE) 77 extern size_t md_root_size; /* Memory disc size */ 78 #endif /* MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */ 79 80 pv_addr_t kernelstack; 81 82 void * msgbufaddr; 83 extern paddr_t msgbufphys; 84 85 int kernel_debug = 0; 86 87 /* exported variable to be filled in by the bootloaders */ 88 char *booted_kernel; 89 90 91 /* Prototypes */ 92 93 void data_abort_handler(trapframe_t *frame); 94 void prefetch_abort_handler(trapframe_t *frame); 95 extern void configure(void); 96 97 /* 98 * arm32_vector_init: 99 * 100 * Initialize the vector page, and select whether or not to 101 * relocate the vectors. 102 * 103 * NOTE: We expect the vector page to be mapped at its expected 104 * destination. 105 */ 106 void 107 arm32_vector_init(vaddr_t va, int which) 108 { 109 extern unsigned int page0[], page0_data[]; 110 unsigned int *vectors = (int *) va; 111 unsigned int *vectors_data = vectors + (page0_data - page0); 112 int vec; 113 114 /* 115 * Loop through the vectors we're taking over, and copy the 116 * vector's insn and data word. 117 */ 118 for (vec = 0; vec < ARM_NVEC; vec++) { 119 if ((which & (1 << vec)) == 0) { 120 /* Don't want to take over this vector. */ 121 continue; 122 } 123 vectors[vec] = page0[vec]; 124 vectors_data[vec] = page0_data[vec]; 125 } 126 127 /* Now sync the vectors. */ 128 cpu_icache_sync_range(va, (ARM_NVEC * 2) * sizeof(u_int)); 129 130 vector_page = va; 131 132 if (va == ARM_VECTORS_HIGH) { 133 /* 134 * Assume the MD caller knows what it's doing here, and 135 * really does want the vector page relocated. 136 * 137 * Note: This has to be done here (and not just in 138 * cpu_setup()) because the vector page needs to be 139 * accessible *before* cpu_startup() is called. 140 * Think ddb(9) ... 141 * 142 * NOTE: If the CPU control register is not readable, 143 * this will totally fail! We'll just assume that 144 * any system that has high vector support has a 145 * readable CPU control register, for now. If we 146 * ever encounter one that does not, we'll have to 147 * rethink this. 148 */ 149 cpu_control(CPU_CONTROL_VECRELOC, CPU_CONTROL_VECRELOC); 150 } 151 } 152 153 /* 154 * Debug function just to park the CPU 155 */ 156 157 void 158 halt(void) 159 { 160 while (1) 161 cpu_sleep(0); 162 } 163 164 165 /* Sync the discs and unmount the filesystems */ 166 167 void 168 bootsync(void) 169 { 170 static bool bootsyncdone = false; 171 172 if (bootsyncdone) return; 173 174 bootsyncdone = true; 175 176 /* Make sure we can still manage to do things */ 177 if (GetCPSR() & I32_bit) { 178 /* 179 * If we get here then boot has been called without RB_NOSYNC 180 * and interrupts were disabled. This means the boot() call 181 * did not come from a user process e.g. shutdown, but must 182 * have come from somewhere in the kernel. 183 */ 184 IRQenable; 185 printf("Warning IRQ's disabled during boot()\n"); 186 } 187 188 vfs_shutdown(); 189 } 190 191 /* 192 * void cpu_startup(void) 193 * 194 * Machine dependant startup code. 195 * 196 */ 197 void 198 cpu_startup(void) 199 { 200 vaddr_t minaddr; 201 vaddr_t maxaddr; 202 u_int loop; 203 char pbuf[9]; 204 205 /* Set the CPU control register */ 206 cpu_setup(boot_args); 207 208 /* Lock down zero page */ 209 vector_page_setprot(VM_PROT_READ); 210 211 /* 212 * Give pmap a chance to set up a few more things now the vm 213 * is initialised 214 */ 215 pmap_postinit(); 216 217 /* 218 * Initialize error message buffer (at end of core). 219 */ 220 221 /* msgbufphys was setup during the secondary boot strap */ 222 for (loop = 0; loop < btoc(MSGBUFSIZE); ++loop) 223 pmap_kenter_pa((vaddr_t)msgbufaddr + loop * PAGE_SIZE, 224 msgbufphys + loop * PAGE_SIZE, 225 VM_PROT_READ|VM_PROT_WRITE, 0); 226 pmap_update(pmap_kernel()); 227 initmsgbuf(msgbufaddr, round_page(MSGBUFSIZE)); 228 229 /* 230 * Identify ourselves for the msgbuf (everything printed earlier will 231 * not be buffered). 232 */ 233 printf("%s%s", copyright, version); 234 235 format_bytes(pbuf, sizeof(pbuf), arm_ptob(physmem)); 236 printf("total memory = %s\n", pbuf); 237 238 minaddr = 0; 239 240 /* 241 * Allocate a submap for physio 242 */ 243 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 244 VM_PHYS_SIZE, 0, false, NULL); 245 246 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 247 printf("avail memory = %s\n", pbuf); 248 249 curpcb = lwp_getpcb(&lwp0); 250 curpcb->pcb_flags = 0; 251 curpcb->pcb_un.un_32.pcb32_sp = 252 uvm_lwp_getuarea(&lwp0) + USPACE_SVC_STACK_TOP; 253 curpcb->pcb_tf = (struct trapframe *)curpcb->pcb_un.un_32.pcb32_sp - 1; 254 } 255 256 /* 257 * machine dependent system variables. 258 */ 259 static int 260 sysctl_machdep_booted_device(SYSCTLFN_ARGS) 261 { 262 struct sysctlnode node; 263 264 if (booted_device == NULL) 265 return (EOPNOTSUPP); 266 267 node = *rnode; 268 node.sysctl_data = booted_device->dv_xname; 269 node.sysctl_size = strlen(booted_device->dv_xname) + 1; 270 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 271 } 272 273 static int 274 sysctl_machdep_booted_kernel(SYSCTLFN_ARGS) 275 { 276 struct sysctlnode node; 277 278 if (booted_kernel == NULL || booted_kernel[0] == '\0') 279 return (EOPNOTSUPP); 280 281 node = *rnode; 282 node.sysctl_data = booted_kernel; 283 node.sysctl_size = strlen(booted_kernel) + 1; 284 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 285 } 286 287 static int 288 sysctl_machdep_powersave(SYSCTLFN_ARGS) 289 { 290 struct sysctlnode node = *rnode; 291 int error, newval; 292 293 newval = cpu_do_powersave; 294 node.sysctl_data = &newval; 295 if (cpufuncs.cf_sleep == (void *) cpufunc_nullop) 296 node.sysctl_flags &= ~CTLFLAG_READWRITE; 297 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 298 if (error || newp == NULL || newval == cpu_do_powersave) 299 return (error); 300 301 if (newval < 0 || newval > 1) 302 return (EINVAL); 303 cpu_do_powersave = newval; 304 305 return (0); 306 } 307 308 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup") 309 { 310 311 sysctl_createv(clog, 0, NULL, NULL, 312 CTLFLAG_PERMANENT, 313 CTLTYPE_NODE, "machdep", NULL, 314 NULL, 0, NULL, 0, 315 CTL_MACHDEP, CTL_EOL); 316 317 sysctl_createv(clog, 0, NULL, NULL, 318 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 319 CTLTYPE_INT, "debug", NULL, 320 NULL, 0, &kernel_debug, 0, 321 CTL_MACHDEP, CPU_DEBUG, CTL_EOL); 322 sysctl_createv(clog, 0, NULL, NULL, 323 CTLFLAG_PERMANENT, 324 CTLTYPE_STRING, "booted_device", NULL, 325 sysctl_machdep_booted_device, 0, NULL, 0, 326 CTL_MACHDEP, CPU_BOOTED_DEVICE, CTL_EOL); 327 sysctl_createv(clog, 0, NULL, NULL, 328 CTLFLAG_PERMANENT, 329 CTLTYPE_STRING, "booted_kernel", NULL, 330 sysctl_machdep_booted_kernel, 0, NULL, 0, 331 CTL_MACHDEP, CPU_BOOTED_KERNEL, CTL_EOL); 332 sysctl_createv(clog, 0, NULL, NULL, 333 CTLFLAG_PERMANENT, 334 CTLTYPE_STRUCT, "console_device", NULL, 335 sysctl_consdev, 0, NULL, sizeof(dev_t), 336 CTL_MACHDEP, CPU_CONSDEV, CTL_EOL); 337 sysctl_createv(clog, 0, NULL, NULL, 338 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 339 CTLTYPE_INT, "powersave", NULL, 340 sysctl_machdep_powersave, 0, &cpu_do_powersave, 0, 341 CTL_MACHDEP, CPU_POWERSAVE, CTL_EOL); 342 } 343 344 void 345 parse_mi_bootargs(char *args) 346 { 347 int integer; 348 349 if (get_bootconf_option(args, "single", BOOTOPT_TYPE_BOOLEAN, &integer) 350 || get_bootconf_option(args, "-s", BOOTOPT_TYPE_BOOLEAN, &integer)) 351 if (integer) 352 boothowto |= RB_SINGLE; 353 if (get_bootconf_option(args, "kdb", BOOTOPT_TYPE_BOOLEAN, &integer) 354 || get_bootconf_option(args, "-k", BOOTOPT_TYPE_BOOLEAN, &integer)) 355 if (integer) 356 boothowto |= RB_KDB; 357 if (get_bootconf_option(args, "ask", BOOTOPT_TYPE_BOOLEAN, &integer) 358 || get_bootconf_option(args, "-a", BOOTOPT_TYPE_BOOLEAN, &integer)) 359 if (integer) 360 boothowto |= RB_ASKNAME; 361 362 #ifdef PMAP_DEBUG 363 if (get_bootconf_option(args, "pmapdebug", BOOTOPT_TYPE_INT, &integer)) { 364 pmap_debug_level = integer; 365 pmap_debug(pmap_debug_level); 366 } 367 #endif /* PMAP_DEBUG */ 368 369 /* if (get_bootconf_option(args, "nbuf", BOOTOPT_TYPE_INT, &integer)) 370 bufpages = integer;*/ 371 372 #if defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE) 373 if (get_bootconf_option(args, "memorydisc", BOOTOPT_TYPE_INT, &integer) 374 || get_bootconf_option(args, "memorydisk", BOOTOPT_TYPE_INT, &integer)) { 375 md_root_size = integer; 376 md_root_size *= 1024; 377 if (md_root_size < 32*1024) 378 md_root_size = 32*1024; 379 if (md_root_size > 2048*1024) 380 md_root_size = 2048*1024; 381 } 382 #endif /* MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */ 383 384 if (get_bootconf_option(args, "quiet", BOOTOPT_TYPE_BOOLEAN, &integer) 385 || get_bootconf_option(args, "-q", BOOTOPT_TYPE_BOOLEAN, &integer)) 386 if (integer) 387 boothowto |= AB_QUIET; 388 if (get_bootconf_option(args, "verbose", BOOTOPT_TYPE_BOOLEAN, &integer) 389 || get_bootconf_option(args, "-v", BOOTOPT_TYPE_BOOLEAN, &integer)) 390 if (integer) 391 boothowto |= AB_VERBOSE; 392 } 393 394 #ifdef __HAVE_FAST_SOFTINTS 395 #if IPL_SOFTSERIAL != IPL_SOFTNET + 1 396 #error IPLs are screwed up 397 #elif IPL_SOFTNET != IPL_SOFTBIO + 1 398 #error IPLs are screwed up 399 #elif IPL_SOFTBIO != IPL_SOFTCLOCK + 1 400 #error IPLs are screwed up 401 #elif !(IPL_SOFTCLOCK > IPL_NONE) 402 #error IPLs are screwed up 403 #elif (IPL_NONE != 0) 404 #error IPLs are screwed up 405 #endif 406 407 #define SOFTINT2IPLMAP \ 408 (((IPL_SOFTSERIAL - IPL_SOFTCLOCK) << (SOFTINT_SERIAL * 4)) | \ 409 ((IPL_SOFTNET - IPL_SOFTCLOCK) << (SOFTINT_NET * 4)) | \ 410 ((IPL_SOFTBIO - IPL_SOFTCLOCK) << (SOFTINT_BIO * 4)) | \ 411 ((IPL_SOFTCLOCK - IPL_SOFTCLOCK) << (SOFTINT_CLOCK * 4))) 412 #define SOFTINT2IPL(l) ((SOFTINT2IPLMAP >> ((l) * 4)) & 0x0f) 413 414 /* 415 * This returns a mask of softint IPLs that be dispatch at <ipl> 416 * SOFTIPLMASK(IPL_NONE) = 0x0000000f 417 * SOFTIPLMASK(IPL_SOFTCLOCK) = 0x0000000e 418 * SOFTIPLMASK(IPL_SOFTBIO) = 0x0000000c 419 * SOFTIPLMASK(IPL_SOFTNET) = 0x00000008 420 * SOFTIPLMASK(IPL_SOFTSERIAL) = 0x00000000 421 */ 422 #define SOFTIPLMASK(ipl) (0x0f << (ipl)) 423 424 void softint_switch(lwp_t *, int); 425 426 void 427 softint_trigger(uintptr_t mask) 428 { 429 curcpu()->ci_softints |= mask; 430 } 431 432 void 433 softint_init_md(lwp_t *l, u_int level, uintptr_t *machdep) 434 { 435 lwp_t ** lp = &curcpu()->ci_softlwps[level]; 436 KASSERT(*lp == NULL || *lp == l); 437 *lp = l; 438 *machdep = 1 << SOFTINT2IPL(level); 439 KASSERT(level != SOFTINT_CLOCK || *machdep == (1 << (IPL_SOFTCLOCK - IPL_SOFTCLOCK))); 440 KASSERT(level != SOFTINT_BIO || *machdep == (1 << (IPL_SOFTBIO - IPL_SOFTCLOCK))); 441 KASSERT(level != SOFTINT_NET || *machdep == (1 << (IPL_SOFTNET - IPL_SOFTCLOCK))); 442 KASSERT(level != SOFTINT_SERIAL || *machdep == (1 << (IPL_SOFTSERIAL - IPL_SOFTCLOCK))); 443 } 444 445 void 446 dosoftints(void) 447 { 448 struct cpu_info * const ci = curcpu(); 449 const int opl = ci->ci_cpl; 450 const uint32_t softiplmask = SOFTIPLMASK(opl); 451 452 for (;;) { 453 u_int softints = ci->ci_softints & softiplmask; 454 KASSERT((softints != 0) == ((ci->ci_softints >> opl) != 0)); 455 if (softints == 0) 456 return; 457 ci->ci_cpl = IPL_HIGH; 458 #define DOSOFTINT(n) \ 459 if (softints & (1 << (IPL_SOFT ## n - IPL_SOFTCLOCK))) { \ 460 ci->ci_softints &= \ 461 ~(1 << (IPL_SOFT ## n - IPL_SOFTCLOCK)); \ 462 softint_switch(ci->ci_softlwps[SOFTINT_ ## n], \ 463 IPL_SOFT ## n); \ 464 ci->ci_cpl = opl; \ 465 continue; \ 466 } 467 DOSOFTINT(SERIAL); 468 DOSOFTINT(NET); 469 DOSOFTINT(BIO); 470 DOSOFTINT(CLOCK); 471 panic("dosoftints wtf (softints=%u?, ipl=%d)", softints, opl); 472 } 473 } 474 #endif /* __HAVE_FAST_SOFTINTS */ 475 476 #ifdef MODULAR 477 /* 478 * Push any modules loaded by the boot loader. 479 */ 480 void 481 module_init_md(void) 482 { 483 } 484 #endif /* MODULAR */ 485 486 int 487 mm_md_physacc(paddr_t pa, vm_prot_t prot) 488 { 489 490 return (pa < ctob(physmem)) ? 0 : EFAULT; 491 } 492
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