arm32_machdep.c revision 1.71
1 /* $NetBSD: arm32_machdep.c,v 1.71 2009/11/29 04:15:42 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 1.71 2009/11/29 04:15:42 rmind Exp $"); 46 47 #include "opt_md.h" 48 #include "opt_pmap_debug.h" 49 50 #include <sys/param.h> 51 #include <sys/systm.h> 52 #include <sys/reboot.h> 53 #include <sys/proc.h> 54 #include <sys/kernel.h> 55 #include <sys/mbuf.h> 56 #include <sys/mount.h> 57 #include <sys/buf.h> 58 #include <sys/msgbuf.h> 59 #include <sys/device.h> 60 #include <uvm/uvm_extern.h> 61 #include <sys/sysctl.h> 62 #include <sys/cpu.h> 63 64 #include <dev/cons.h> 65 66 #include <arm/arm32/katelib.h> 67 #include <arm/arm32/machdep.h> 68 #include <machine/bootconfig.h> 69 70 #include "md.h" 71 72 struct vm_map *mb_map = NULL; 73 struct vm_map *phys_map = NULL; 74 75 #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE) 76 extern size_t md_root_size; /* Memory disc size */ 77 #endif /* NMD && MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */ 78 79 pv_addr_t kernelstack; 80 81 void * msgbufaddr; 82 extern paddr_t msgbufphys; 83 84 int kernel_debug = 0; 85 86 /* exported variable to be filled in by the bootloaders */ 87 char *booted_kernel; 88 89 90 /* Prototypes */ 91 92 void data_abort_handler(trapframe_t *frame); 93 void prefetch_abort_handler(trapframe_t *frame); 94 extern void configure(void); 95 96 /* 97 * arm32_vector_init: 98 * 99 * Initialize the vector page, and select whether or not to 100 * relocate the vectors. 101 * 102 * NOTE: We expect the vector page to be mapped at its expected 103 * destination. 104 */ 105 void 106 arm32_vector_init(vaddr_t va, int which) 107 { 108 extern unsigned int page0[], page0_data[]; 109 unsigned int *vectors = (int *) va; 110 unsigned int *vectors_data = vectors + (page0_data - page0); 111 int vec; 112 113 /* 114 * Loop through the vectors we're taking over, and copy the 115 * vector's insn and data word. 116 */ 117 for (vec = 0; vec < ARM_NVEC; vec++) { 118 if ((which & (1 << vec)) == 0) { 119 /* Don't want to take over this vector. */ 120 continue; 121 } 122 vectors[vec] = page0[vec]; 123 vectors_data[vec] = page0_data[vec]; 124 } 125 126 /* Now sync the vectors. */ 127 cpu_icache_sync_range(va, (ARM_NVEC * 2) * sizeof(u_int)); 128 129 vector_page = va; 130 131 if (va == ARM_VECTORS_HIGH) { 132 /* 133 * Assume the MD caller knows what it's doing here, and 134 * really does want the vector page relocated. 135 * 136 * Note: This has to be done here (and not just in 137 * cpu_setup()) because the vector page needs to be 138 * accessible *before* cpu_startup() is called. 139 * Think ddb(9) ... 140 * 141 * NOTE: If the CPU control register is not readable, 142 * this will totally fail! We'll just assume that 143 * any system that has high vector support has a 144 * readable CPU control register, for now. If we 145 * ever encounter one that does not, we'll have to 146 * rethink this. 147 */ 148 cpu_control(CPU_CONTROL_VECRELOC, CPU_CONTROL_VECRELOC); 149 } 150 } 151 152 /* 153 * Debug function just to park the CPU 154 */ 155 156 void 157 halt(void) 158 { 159 while (1) 160 cpu_sleep(0); 161 } 162 163 164 /* Sync the discs and unmount the filesystems */ 165 166 void 167 bootsync(void) 168 { 169 static bool bootsyncdone = false; 170 171 if (bootsyncdone) return; 172 173 bootsyncdone = true; 174 175 /* Make sure we can still manage to do things */ 176 if (GetCPSR() & I32_bit) { 177 /* 178 * If we get here then boot has been called without RB_NOSYNC 179 * and interrupts were disabled. This means the boot() call 180 * did not come from a user process e.g. shutdown, but must 181 * have come from somewhere in the kernel. 182 */ 183 IRQenable; 184 printf("Warning IRQ's disabled during boot()\n"); 185 } 186 187 vfs_shutdown(); 188 } 189 190 /* 191 * void cpu_startup(void) 192 * 193 * Machine dependant startup code. 194 * 195 */ 196 void 197 cpu_startup(void) 198 { 199 vaddr_t minaddr; 200 vaddr_t maxaddr; 201 u_int loop; 202 char pbuf[9]; 203 204 /* Set the CPU control register */ 205 cpu_setup(boot_args); 206 207 /* Lock down zero page */ 208 vector_page_setprot(VM_PROT_READ); 209 210 /* 211 * Give pmap a chance to set up a few more things now the vm 212 * is initialised 213 */ 214 pmap_postinit(); 215 216 /* 217 * Initialize error message buffer (at end of core). 218 */ 219 220 /* msgbufphys was setup during the secondary boot strap */ 221 for (loop = 0; loop < btoc(MSGBUFSIZE); ++loop) 222 pmap_kenter_pa((vaddr_t)msgbufaddr + loop * PAGE_SIZE, 223 msgbufphys + loop * PAGE_SIZE, 224 VM_PROT_READ|VM_PROT_WRITE, 0); 225 pmap_update(pmap_kernel()); 226 initmsgbuf(msgbufaddr, round_page(MSGBUFSIZE)); 227 228 /* 229 * Identify ourselves for the msgbuf (everything printed earlier will 230 * not be buffered). 231 */ 232 printf("%s%s", copyright, version); 233 234 format_bytes(pbuf, sizeof(pbuf), arm_ptob(physmem)); 235 printf("total memory = %s\n", pbuf); 236 237 minaddr = 0; 238 239 /* 240 * Allocate a submap for physio 241 */ 242 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 243 VM_PHYS_SIZE, 0, false, NULL); 244 245 /* 246 * Finally, allocate mbuf cluster submap. 247 */ 248 mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 249 nmbclusters * mclbytes, VM_MAP_INTRSAFE, 250 false, NULL); 251 252 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 253 printf("avail memory = %s\n", pbuf); 254 255 curpcb = lwp_getpcb(&lwp0); 256 curpcb->pcb_flags = 0; 257 curpcb->pcb_un.un_32.pcb32_sp = 258 uvm_lwp_getuarea(&lwp0) + USPACE_SVC_STACK_TOP; 259 curpcb->pcb_tf = (struct trapframe *)curpcb->pcb_un.un_32.pcb32_sp - 1; 260 } 261 262 /* 263 * machine dependent system variables. 264 */ 265 static int 266 sysctl_machdep_booted_device(SYSCTLFN_ARGS) 267 { 268 struct sysctlnode node; 269 270 if (booted_device == NULL) 271 return (EOPNOTSUPP); 272 273 node = *rnode; 274 node.sysctl_data = booted_device->dv_xname; 275 node.sysctl_size = strlen(booted_device->dv_xname) + 1; 276 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 277 } 278 279 static int 280 sysctl_machdep_booted_kernel(SYSCTLFN_ARGS) 281 { 282 struct sysctlnode node; 283 284 if (booted_kernel == NULL || booted_kernel[0] == '\0') 285 return (EOPNOTSUPP); 286 287 node = *rnode; 288 node.sysctl_data = booted_kernel; 289 node.sysctl_size = strlen(booted_kernel) + 1; 290 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 291 } 292 293 static int 294 sysctl_machdep_powersave(SYSCTLFN_ARGS) 295 { 296 struct sysctlnode node = *rnode; 297 int error, newval; 298 299 newval = cpu_do_powersave; 300 node.sysctl_data = &newval; 301 if (cpufuncs.cf_sleep == (void *) cpufunc_nullop) 302 node.sysctl_flags &= ~CTLFLAG_READWRITE; 303 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 304 if (error || newp == NULL || newval == cpu_do_powersave) 305 return (error); 306 307 if (newval < 0 || newval > 1) 308 return (EINVAL); 309 cpu_do_powersave = newval; 310 311 return (0); 312 } 313 314 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup") 315 { 316 317 sysctl_createv(clog, 0, NULL, NULL, 318 CTLFLAG_PERMANENT, 319 CTLTYPE_NODE, "machdep", NULL, 320 NULL, 0, NULL, 0, 321 CTL_MACHDEP, CTL_EOL); 322 323 sysctl_createv(clog, 0, NULL, NULL, 324 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 325 CTLTYPE_INT, "debug", NULL, 326 NULL, 0, &kernel_debug, 0, 327 CTL_MACHDEP, CPU_DEBUG, CTL_EOL); 328 sysctl_createv(clog, 0, NULL, NULL, 329 CTLFLAG_PERMANENT, 330 CTLTYPE_STRING, "booted_device", NULL, 331 sysctl_machdep_booted_device, 0, NULL, 0, 332 CTL_MACHDEP, CPU_BOOTED_DEVICE, CTL_EOL); 333 sysctl_createv(clog, 0, NULL, NULL, 334 CTLFLAG_PERMANENT, 335 CTLTYPE_STRING, "booted_kernel", NULL, 336 sysctl_machdep_booted_kernel, 0, NULL, 0, 337 CTL_MACHDEP, CPU_BOOTED_KERNEL, CTL_EOL); 338 sysctl_createv(clog, 0, NULL, NULL, 339 CTLFLAG_PERMANENT, 340 CTLTYPE_STRUCT, "console_device", NULL, 341 sysctl_consdev, 0, NULL, sizeof(dev_t), 342 CTL_MACHDEP, CPU_CONSDEV, CTL_EOL); 343 sysctl_createv(clog, 0, NULL, NULL, 344 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 345 CTLTYPE_INT, "powersave", NULL, 346 sysctl_machdep_powersave, 0, &cpu_do_powersave, 0, 347 CTL_MACHDEP, CPU_POWERSAVE, CTL_EOL); 348 } 349 350 void 351 parse_mi_bootargs(char *args) 352 { 353 int integer; 354 355 if (get_bootconf_option(args, "single", BOOTOPT_TYPE_BOOLEAN, &integer) 356 || get_bootconf_option(args, "-s", BOOTOPT_TYPE_BOOLEAN, &integer)) 357 if (integer) 358 boothowto |= RB_SINGLE; 359 if (get_bootconf_option(args, "kdb", BOOTOPT_TYPE_BOOLEAN, &integer) 360 || get_bootconf_option(args, "-k", BOOTOPT_TYPE_BOOLEAN, &integer)) 361 if (integer) 362 boothowto |= RB_KDB; 363 if (get_bootconf_option(args, "ask", BOOTOPT_TYPE_BOOLEAN, &integer) 364 || get_bootconf_option(args, "-a", BOOTOPT_TYPE_BOOLEAN, &integer)) 365 if (integer) 366 boothowto |= RB_ASKNAME; 367 368 #ifdef PMAP_DEBUG 369 if (get_bootconf_option(args, "pmapdebug", BOOTOPT_TYPE_INT, &integer)) { 370 pmap_debug_level = integer; 371 pmap_debug(pmap_debug_level); 372 } 373 #endif /* PMAP_DEBUG */ 374 375 /* if (get_bootconf_option(args, "nbuf", BOOTOPT_TYPE_INT, &integer)) 376 bufpages = integer;*/ 377 378 #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE) 379 if (get_bootconf_option(args, "memorydisc", BOOTOPT_TYPE_INT, &integer) 380 || get_bootconf_option(args, "memorydisk", BOOTOPT_TYPE_INT, &integer)) { 381 md_root_size = integer; 382 md_root_size *= 1024; 383 if (md_root_size < 32*1024) 384 md_root_size = 32*1024; 385 if (md_root_size > 2048*1024) 386 md_root_size = 2048*1024; 387 } 388 #endif /* NMD && MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */ 389 390 if (get_bootconf_option(args, "quiet", BOOTOPT_TYPE_BOOLEAN, &integer) 391 || get_bootconf_option(args, "-q", BOOTOPT_TYPE_BOOLEAN, &integer)) 392 if (integer) 393 boothowto |= AB_QUIET; 394 if (get_bootconf_option(args, "verbose", BOOTOPT_TYPE_BOOLEAN, &integer) 395 || get_bootconf_option(args, "-v", BOOTOPT_TYPE_BOOLEAN, &integer)) 396 if (integer) 397 boothowto |= AB_VERBOSE; 398 } 399 400 #ifdef __HAVE_FAST_SOFTINTS 401 #if IPL_SOFTSERIAL != IPL_SOFTNET + 1 402 #error IPLs are screwed up 403 #elif IPL_SOFTNET != IPL_SOFTBIO + 1 404 #error IPLs are screwed up 405 #elif IPL_SOFTBIO != IPL_SOFTCLOCK + 1 406 #error IPLs are screwed up 407 #elif !(IPL_SOFTCLOCK > IPL_NONE) 408 #error IPLs are screwed up 409 #elif (IPL_NONE != 0) 410 #error IPLs are screwed up 411 #endif 412 413 #define SOFTINT2IPLMAP \ 414 (((IPL_SOFTSERIAL - IPL_SOFTCLOCK) << (SOFTINT_SERIAL * 4)) | \ 415 ((IPL_SOFTNET - IPL_SOFTCLOCK) << (SOFTINT_NET * 4)) | \ 416 ((IPL_SOFTBIO - IPL_SOFTCLOCK) << (SOFTINT_BIO * 4)) | \ 417 ((IPL_SOFTCLOCK - IPL_SOFTCLOCK) << (SOFTINT_CLOCK * 4))) 418 #define SOFTINT2IPL(l) ((SOFTINT2IPLMAP >> ((l) * 4)) & 0x0f) 419 420 /* 421 * This returns a mask of softint IPLs that be dispatch at <ipl> 422 * SOFTIPLMASK(IPL_NONE) = 0x0000000f 423 * SOFTIPLMASK(IPL_SOFTCLOCK) = 0x0000000e 424 * SOFTIPLMASK(IPL_SOFTBIO) = 0x0000000c 425 * SOFTIPLMASK(IPL_SOFTNET) = 0x00000008 426 * SOFTIPLMASK(IPL_SOFTSERIAL) = 0x00000000 427 */ 428 #define SOFTIPLMASK(ipl) (0x0f << (ipl)) 429 430 void softint_switch(lwp_t *, int); 431 432 void 433 softint_trigger(uintptr_t mask) 434 { 435 curcpu()->ci_softints |= mask; 436 } 437 438 void 439 softint_init_md(lwp_t *l, u_int level, uintptr_t *machdep) 440 { 441 lwp_t ** lp = &curcpu()->ci_softlwps[level]; 442 KASSERT(*lp == NULL || *lp == l); 443 *lp = l; 444 *machdep = 1 << SOFTINT2IPL(level); 445 KASSERT(level != SOFTINT_CLOCK || *machdep == (1 << (IPL_SOFTCLOCK - IPL_SOFTCLOCK))); 446 KASSERT(level != SOFTINT_BIO || *machdep == (1 << (IPL_SOFTBIO - IPL_SOFTCLOCK))); 447 KASSERT(level != SOFTINT_NET || *machdep == (1 << (IPL_SOFTNET - IPL_SOFTCLOCK))); 448 KASSERT(level != SOFTINT_SERIAL || *machdep == (1 << (IPL_SOFTSERIAL - IPL_SOFTCLOCK))); 449 } 450 451 void 452 dosoftints(void) 453 { 454 struct cpu_info * const ci = curcpu(); 455 const int opl = ci->ci_cpl; 456 const uint32_t softiplmask = SOFTIPLMASK(opl); 457 458 for (;;) { 459 u_int softints = ci->ci_softints & softiplmask; 460 KASSERT((softints != 0) == ((ci->ci_softints >> opl) != 0)); 461 if (softints == 0) 462 return; 463 ci->ci_cpl = IPL_HIGH; 464 #define DOSOFTINT(n) \ 465 if (softints & (1 << (IPL_SOFT ## n - IPL_SOFTCLOCK))) { \ 466 ci->ci_softints &= \ 467 ~(1 << (IPL_SOFT ## n - IPL_SOFTCLOCK)); \ 468 softint_switch(ci->ci_softlwps[SOFTINT_ ## n], \ 469 IPL_SOFT ## n); \ 470 ci->ci_cpl = opl; \ 471 continue; \ 472 } 473 DOSOFTINT(SERIAL); 474 DOSOFTINT(NET); 475 DOSOFTINT(BIO); 476 DOSOFTINT(CLOCK); 477 panic("dosoftints wtf (softints=%u?, ipl=%d)", softints, opl); 478 } 479 } 480 #endif /* __HAVE_FAST_SOFTINTS */ 481
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