1 /* $NetBSD: arm32_machdep.c,v 1.74 2010/11/28 08:23:22 hannken 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 1.74 2010/11/28 08:23:22 hannken 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/kernel.h> 56 #include <sys/mbuf.h> 57 #include <sys/mount.h> 58 #include <sys/buf.h> 59 #include <sys/msgbuf.h> 60 #include <sys/device.h> 61 #include <uvm/uvm_extern.h> 62 #include <sys/sysctl.h> 63 #include <sys/cpu.h> 64 #include <sys/module.h> 65 66 #include <dev/cons.h> 67 68 #include <arm/arm32/katelib.h> 69 #include <arm/arm32/machdep.h> 70 #include <machine/bootconfig.h> 71 72 struct vm_map *phys_map = NULL; 73 74 #if defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE) 75 extern size_t md_root_size; /* Memory disc size */ 76 #endif /* MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */ 77 78 pv_addr_t kernelstack; 79 80 void * msgbufaddr; 81 extern paddr_t msgbufphys; 82 83 int kernel_debug = 0; 84 85 /* exported variable to be filled in by the bootloaders */ 86 char *booted_kernel; 87 88 89 /* Prototypes */ 90 91 void data_abort_handler(trapframe_t *frame); 92 void prefetch_abort_handler(trapframe_t *frame); 93 extern void configure(void); 94 95 /* 96 * arm32_vector_init: 97 * 98 * Initialize the vector page, and select whether or not to 99 * relocate the vectors. 100 * 101 * NOTE: We expect the vector page to be mapped at its expected 102 * destination. 103 */ 104 void 105 arm32_vector_init(vaddr_t va, int which) 106 { 107 extern unsigned int page0[], page0_data[]; 108 unsigned int *vectors = (int *) va; 109 unsigned int *vectors_data = vectors + (page0_data - page0); 110 int vec; 111 112 /* 113 * Loop through the vectors we're taking over, and copy the 114 * vector's insn and data word. 115 */ 116 for (vec = 0; vec < ARM_NVEC; vec++) { 117 if ((which & (1 << vec)) == 0) { 118 /* Don't want to take over this vector. */ 119 continue; 120 } 121 vectors[vec] = page0[vec]; 122 vectors_data[vec] = page0_data[vec]; 123 } 124 125 /* Now sync the vectors. */ 126 cpu_icache_sync_range(va, (ARM_NVEC * 2) * sizeof(u_int)); 127 128 vector_page = va; 129 130 if (va == ARM_VECTORS_HIGH) { 131 /* 132 * Assume the MD caller knows what it's doing here, and 133 * really does want the vector page relocated. 134 * 135 * Note: This has to be done here (and not just in 136 * cpu_setup()) because the vector page needs to be 137 * accessible *before* cpu_startup() is called. 138 * Think ddb(9) ... 139 * 140 * NOTE: If the CPU control register is not readable, 141 * this will totally fail! We'll just assume that 142 * any system that has high vector support has a 143 * readable CPU control register, for now. If we 144 * ever encounter one that does not, we'll have to 145 * rethink this. 146 */ 147 cpu_control(CPU_CONTROL_VECRELOC, CPU_CONTROL_VECRELOC); 148 } 149 } 150 151 /* 152 * Debug function just to park the CPU 153 */ 154 155 void 156 halt(void) 157 { 158 while (1) 159 cpu_sleep(0); 160 } 161 162 163 /* Sync the discs and unmount the filesystems */ 164 165 void 166 bootsync(void) 167 { 168 static bool bootsyncdone = false; 169 170 if (bootsyncdone) return; 171 172 bootsyncdone = true; 173 174 /* Make sure we can still manage to do things */ 175 if (GetCPSR() & I32_bit) { 176 /* 177 * If we get here then boot has been called without RB_NOSYNC 178 * and interrupts were disabled. This means the boot() call 179 * did not come from a user process e.g. shutdown, but must 180 * have come from somewhere in the kernel. 181 */ 182 IRQenable; 183 printf("Warning IRQ's disabled during boot()\n"); 184 } 185 186 vfs_shutdown(); 187 } 188 189 /* 190 * void cpu_startup(void) 191 * 192 * Machine dependant startup code. 193 * 194 */ 195 void 196 cpu_startup(void) 197 { 198 vaddr_t minaddr; 199 vaddr_t maxaddr; 200 u_int loop; 201 char pbuf[9]; 202 203 /* Set the CPU control register */ 204 cpu_setup(boot_args); 205 206 /* Lock down zero page */ 207 vector_page_setprot(VM_PROT_READ); 208 209 /* 210 * Give pmap a chance to set up a few more things now the vm 211 * is initialised 212 */ 213 pmap_postinit(); 214 215 /* 216 * Initialize error message buffer (at end of core). 217 */ 218 219 /* msgbufphys was setup during the secondary boot strap */ 220 for (loop = 0; loop < btoc(MSGBUFSIZE); ++loop) 221 pmap_kenter_pa((vaddr_t)msgbufaddr + loop * PAGE_SIZE, 222 msgbufphys + loop * PAGE_SIZE, 223 VM_PROT_READ|VM_PROT_WRITE, 0); 224 pmap_update(pmap_kernel()); 225 initmsgbuf(msgbufaddr, round_page(MSGBUFSIZE)); 226 227 /* 228 * Identify ourselves for the msgbuf (everything printed earlier will 229 * not be buffered). 230 */ 231 printf("%s%s", copyright, version); 232 233 format_bytes(pbuf, sizeof(pbuf), arm_ptob(physmem)); 234 printf("total memory = %s\n", pbuf); 235 236 minaddr = 0; 237 238 /* 239 * Allocate a submap for physio 240 */ 241 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 242 VM_PHYS_SIZE, 0, false, NULL); 243 244 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 245 printf("avail memory = %s\n", pbuf); 246 247 curpcb = lwp_getpcb(&lwp0); 248 curpcb->pcb_flags = 0; 249 curpcb->pcb_un.un_32.pcb32_sp = 250 uvm_lwp_getuarea(&lwp0) + USPACE_SVC_STACK_TOP; 251 curpcb->pcb_tf = (struct trapframe *)curpcb->pcb_un.un_32.pcb32_sp - 1; 252 } 253 254 /* 255 * machine dependent system variables. 256 */ 257 static int 258 sysctl_machdep_booted_device(SYSCTLFN_ARGS) 259 { 260 struct sysctlnode node; 261 262 if (booted_device == NULL) 263 return (EOPNOTSUPP); 264 265 node = *rnode; 266 node.sysctl_data = booted_device->dv_xname; 267 node.sysctl_size = strlen(booted_device->dv_xname) + 1; 268 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 269 } 270 271 static int 272 sysctl_machdep_booted_kernel(SYSCTLFN_ARGS) 273 { 274 struct sysctlnode node; 275 276 if (booted_kernel == NULL || booted_kernel[0] == '\0') 277 return (EOPNOTSUPP); 278 279 node = *rnode; 280 node.sysctl_data = booted_kernel; 281 node.sysctl_size = strlen(booted_kernel) + 1; 282 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 283 } 284 285 static int 286 sysctl_machdep_powersave(SYSCTLFN_ARGS) 287 { 288 struct sysctlnode node = *rnode; 289 int error, newval; 290 291 newval = cpu_do_powersave; 292 node.sysctl_data = &newval; 293 if (cpufuncs.cf_sleep == (void *) cpufunc_nullop) 294 node.sysctl_flags &= ~CTLFLAG_READWRITE; 295 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 296 if (error || newp == NULL || newval == cpu_do_powersave) 297 return (error); 298 299 if (newval < 0 || newval > 1) 300 return (EINVAL); 301 cpu_do_powersave = newval; 302 303 return (0); 304 } 305 306 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup") 307 { 308 309 sysctl_createv(clog, 0, NULL, NULL, 310 CTLFLAG_PERMANENT, 311 CTLTYPE_NODE, "machdep", NULL, 312 NULL, 0, NULL, 0, 313 CTL_MACHDEP, CTL_EOL); 314 315 sysctl_createv(clog, 0, NULL, NULL, 316 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 317 CTLTYPE_INT, "debug", NULL, 318 NULL, 0, &kernel_debug, 0, 319 CTL_MACHDEP, CPU_DEBUG, CTL_EOL); 320 sysctl_createv(clog, 0, NULL, NULL, 321 CTLFLAG_PERMANENT, 322 CTLTYPE_STRING, "booted_device", NULL, 323 sysctl_machdep_booted_device, 0, NULL, 0, 324 CTL_MACHDEP, CPU_BOOTED_DEVICE, CTL_EOL); 325 sysctl_createv(clog, 0, NULL, NULL, 326 CTLFLAG_PERMANENT, 327 CTLTYPE_STRING, "booted_kernel", NULL, 328 sysctl_machdep_booted_kernel, 0, NULL, 0, 329 CTL_MACHDEP, CPU_BOOTED_KERNEL, CTL_EOL); 330 sysctl_createv(clog, 0, NULL, NULL, 331 CTLFLAG_PERMANENT, 332 CTLTYPE_STRUCT, "console_device", NULL, 333 sysctl_consdev, 0, NULL, sizeof(dev_t), 334 CTL_MACHDEP, CPU_CONSDEV, CTL_EOL); 335 sysctl_createv(clog, 0, NULL, NULL, 336 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 337 CTLTYPE_INT, "powersave", NULL, 338 sysctl_machdep_powersave, 0, &cpu_do_powersave, 0, 339 CTL_MACHDEP, CPU_POWERSAVE, CTL_EOL); 340 } 341 342 void 343 parse_mi_bootargs(char *args) 344 { 345 int integer; 346 347 if (get_bootconf_option(args, "single", BOOTOPT_TYPE_BOOLEAN, &integer) 348 || get_bootconf_option(args, "-s", BOOTOPT_TYPE_BOOLEAN, &integer)) 349 if (integer) 350 boothowto |= RB_SINGLE; 351 if (get_bootconf_option(args, "kdb", BOOTOPT_TYPE_BOOLEAN, &integer) 352 || get_bootconf_option(args, "-k", BOOTOPT_TYPE_BOOLEAN, &integer)) 353 if (integer) 354 boothowto |= RB_KDB; 355 if (get_bootconf_option(args, "ask", BOOTOPT_TYPE_BOOLEAN, &integer) 356 || get_bootconf_option(args, "-a", BOOTOPT_TYPE_BOOLEAN, &integer)) 357 if (integer) 358 boothowto |= RB_ASKNAME; 359 360 #ifdef PMAP_DEBUG 361 if (get_bootconf_option(args, "pmapdebug", BOOTOPT_TYPE_INT, &integer)) { 362 pmap_debug_level = integer; 363 pmap_debug(pmap_debug_level); 364 } 365 #endif /* PMAP_DEBUG */ 366 367 /* if (get_bootconf_option(args, "nbuf", BOOTOPT_TYPE_INT, &integer)) 368 bufpages = integer;*/ 369 370 #if defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE) 371 if (get_bootconf_option(args, "memorydisc", BOOTOPT_TYPE_INT, &integer) 372 || get_bootconf_option(args, "memorydisk", BOOTOPT_TYPE_INT, &integer)) { 373 md_root_size = integer; 374 md_root_size *= 1024; 375 if (md_root_size < 32*1024) 376 md_root_size = 32*1024; 377 if (md_root_size > 2048*1024) 378 md_root_size = 2048*1024; 379 } 380 #endif /* MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */ 381 382 if (get_bootconf_option(args, "quiet", BOOTOPT_TYPE_BOOLEAN, &integer) 383 || get_bootconf_option(args, "-q", BOOTOPT_TYPE_BOOLEAN, &integer)) 384 if (integer) 385 boothowto |= AB_QUIET; 386 if (get_bootconf_option(args, "verbose", BOOTOPT_TYPE_BOOLEAN, &integer) 387 || get_bootconf_option(args, "-v", BOOTOPT_TYPE_BOOLEAN, &integer)) 388 if (integer) 389 boothowto |= AB_VERBOSE; 390 } 391 392 #ifdef __HAVE_FAST_SOFTINTS 393 #if IPL_SOFTSERIAL != IPL_SOFTNET + 1 394 #error IPLs are screwed up 395 #elif IPL_SOFTNET != IPL_SOFTBIO + 1 396 #error IPLs are screwed up 397 #elif IPL_SOFTBIO != IPL_SOFTCLOCK + 1 398 #error IPLs are screwed up 399 #elif !(IPL_SOFTCLOCK > IPL_NONE) 400 #error IPLs are screwed up 401 #elif (IPL_NONE != 0) 402 #error IPLs are screwed up 403 #endif 404 405 #define SOFTINT2IPLMAP \ 406 (((IPL_SOFTSERIAL - IPL_SOFTCLOCK) << (SOFTINT_SERIAL * 4)) | \ 407 ((IPL_SOFTNET - IPL_SOFTCLOCK) << (SOFTINT_NET * 4)) | \ 408 ((IPL_SOFTBIO - IPL_SOFTCLOCK) << (SOFTINT_BIO * 4)) | \ 409 ((IPL_SOFTCLOCK - IPL_SOFTCLOCK) << (SOFTINT_CLOCK * 4))) 410 #define SOFTINT2IPL(l) ((SOFTINT2IPLMAP >> ((l) * 4)) & 0x0f) 411 412 /* 413 * This returns a mask of softint IPLs that be dispatch at <ipl> 414 * SOFTIPLMASK(IPL_NONE) = 0x0000000f 415 * SOFTIPLMASK(IPL_SOFTCLOCK) = 0x0000000e 416 * SOFTIPLMASK(IPL_SOFTBIO) = 0x0000000c 417 * SOFTIPLMASK(IPL_SOFTNET) = 0x00000008 418 * SOFTIPLMASK(IPL_SOFTSERIAL) = 0x00000000 419 */ 420 #define SOFTIPLMASK(ipl) (0x0f << (ipl)) 421 422 void softint_switch(lwp_t *, int); 423 424 void 425 softint_trigger(uintptr_t mask) 426 { 427 curcpu()->ci_softints |= mask; 428 } 429 430 void 431 softint_init_md(lwp_t *l, u_int level, uintptr_t *machdep) 432 { 433 lwp_t ** lp = &curcpu()->ci_softlwps[level]; 434 KASSERT(*lp == NULL || *lp == l); 435 *lp = l; 436 *machdep = 1 << SOFTINT2IPL(level); 437 KASSERT(level != SOFTINT_CLOCK || *machdep == (1 << (IPL_SOFTCLOCK - IPL_SOFTCLOCK))); 438 KASSERT(level != SOFTINT_BIO || *machdep == (1 << (IPL_SOFTBIO - IPL_SOFTCLOCK))); 439 KASSERT(level != SOFTINT_NET || *machdep == (1 << (IPL_SOFTNET - IPL_SOFTCLOCK))); 440 KASSERT(level != SOFTINT_SERIAL || *machdep == (1 << (IPL_SOFTSERIAL - IPL_SOFTCLOCK))); 441 } 442 443 void 444 dosoftints(void) 445 { 446 struct cpu_info * const ci = curcpu(); 447 const int opl = ci->ci_cpl; 448 const uint32_t softiplmask = SOFTIPLMASK(opl); 449 450 for (;;) { 451 u_int softints = ci->ci_softints & softiplmask; 452 KASSERT((softints != 0) == ((ci->ci_softints >> opl) != 0)); 453 if (softints == 0) 454 return; 455 ci->ci_cpl = IPL_HIGH; 456 #define DOSOFTINT(n) \ 457 if (softints & (1 << (IPL_SOFT ## n - IPL_SOFTCLOCK))) { \ 458 ci->ci_softints &= \ 459 ~(1 << (IPL_SOFT ## n - IPL_SOFTCLOCK)); \ 460 softint_switch(ci->ci_softlwps[SOFTINT_ ## n], \ 461 IPL_SOFT ## n); \ 462 ci->ci_cpl = opl; \ 463 continue; \ 464 } 465 DOSOFTINT(SERIAL); 466 DOSOFTINT(NET); 467 DOSOFTINT(BIO); 468 DOSOFTINT(CLOCK); 469 panic("dosoftints wtf (softints=%u?, ipl=%d)", softints, opl); 470 } 471 } 472 #endif /* __HAVE_FAST_SOFTINTS */ 473 474 #ifdef MODULAR 475 /* 476 * Push any modules loaded by the boot loader. 477 */ 478 void 479 module_init_md(void) 480 { 481 } 482 #endif /* MODULAR */ 483