arm32_machdep.c revision 1.49.12.3
1 /* $NetBSD: arm32_machdep.c,v 1.49.12.3 2007/11/06 23:14:58 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 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 1.49.12.3 2007/11/06 23:14:58 matt Exp $"); 46 47 #include "opt_md.h" 48 #include "opt_cpuoptions.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/user.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 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 #include "opt_ipkdb.h" 73 #include "md.h" 74 75 struct vm_map *exec_map = NULL; 76 struct vm_map *mb_map = NULL; 77 struct vm_map *phys_map = NULL; 78 79 extern int physmem; 80 81 #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE) 82 extern size_t md_root_size; /* Memory disc size */ 83 #endif /* NMD && MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */ 84 85 pv_addr_t kernelstack; 86 87 /* the following is used externally (sysctl_hw) */ 88 char machine[] = MACHINE; /* from <machine/param.h> */ 89 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 90 91 /* Our exported CPU info; we can have only one. */ 92 struct cpu_info cpu_info_store = { 93 .ci_cpl = IPL_HIGH, 94 #ifndef PROCESS_ID_IS_CURLWP 95 .ci_curlwp = &lwp0, 96 #endif 97 }; 98 99 void * msgbufaddr; 100 extern paddr_t msgbufphys; 101 102 int kernel_debug = 0; 103 104 struct user *proc0paddr; 105 106 /* exported variable to be filled in by the bootloaders */ 107 char *booted_kernel; 108 109 110 /* Prototypes */ 111 112 void data_abort_handler __P((trapframe_t *frame)); 113 void prefetch_abort_handler __P((trapframe_t *frame)); 114 extern void configure __P((void)); 115 116 /* 117 * arm32_vector_init: 118 * 119 * Initialize the vector page, and select whether or not to 120 * relocate the vectors. 121 * 122 * NOTE: We expect the vector page to be mapped at its expected 123 * destination. 124 */ 125 void 126 arm32_vector_init(vaddr_t va, int which) 127 { 128 extern unsigned int page0[], page0_data[]; 129 unsigned int *vectors = (int *) va; 130 unsigned int *vectors_data = vectors + (page0_data - page0); 131 int vec; 132 133 /* 134 * Loop through the vectors we're taking over, and copy the 135 * vector's insn and data word. 136 */ 137 for (vec = 0; vec < ARM_NVEC; vec++) { 138 if ((which & (1 << vec)) == 0) { 139 /* Don't want to take over this vector. */ 140 continue; 141 } 142 vectors[vec] = page0[vec]; 143 vectors_data[vec] = page0_data[vec]; 144 } 145 146 /* Now sync the vectors. */ 147 cpu_icache_sync_range(va, (ARM_NVEC * 2) * sizeof(u_int)); 148 149 vector_page = va; 150 151 if (va == ARM_VECTORS_HIGH) { 152 /* 153 * Assume the MD caller knows what it's doing here, and 154 * really does want the vector page relocated. 155 * 156 * Note: This has to be done here (and not just in 157 * cpu_setup()) because the vector page needs to be 158 * accessible *before* cpu_startup() is called. 159 * Think ddb(9) ... 160 * 161 * NOTE: If the CPU control register is not readable, 162 * this will totally fail! We'll just assume that 163 * any system that has high vector support has a 164 * readable CPU control register, for now. If we 165 * ever encounter one that does not, we'll have to 166 * rethink this. 167 */ 168 cpu_control(CPU_CONTROL_VECRELOC, CPU_CONTROL_VECRELOC); 169 } 170 } 171 172 /* 173 * Debug function just to park the CPU 174 */ 175 176 void 177 halt() 178 { 179 while (1) 180 cpu_sleep(0); 181 } 182 183 184 /* Sync the discs and unmount the filesystems */ 185 186 void 187 bootsync(void) 188 { 189 static int bootsyncdone = 0; 190 191 if (bootsyncdone) return; 192 193 bootsyncdone = 1; 194 195 /* Make sure we can still manage to do things */ 196 if (GetCPSR() & I32_bit) { 197 /* 198 * If we get here then boot has been called without RB_NOSYNC 199 * and interrupts were disabled. This means the boot() call 200 * did not come from a user process e.g. shutdown, but must 201 * have come from somewhere in the kernel. 202 */ 203 IRQenable; 204 printf("Warning IRQ's disabled during boot()\n"); 205 } 206 207 vfs_shutdown(); 208 } 209 210 /* 211 * void cpu_startup(void) 212 * 213 * Machine dependant startup code. 214 * 215 */ 216 void 217 cpu_startup() 218 { 219 vaddr_t minaddr; 220 vaddr_t maxaddr; 221 u_int loop; 222 char pbuf[9]; 223 224 /* Set the CPU control register */ 225 cpu_setup(boot_args); 226 227 /* Lock down zero page */ 228 vector_page_setprot(VM_PROT_READ); 229 230 /* 231 * Give pmap a chance to set up a few more things now the vm 232 * is initialised 233 */ 234 pmap_postinit(); 235 236 /* 237 * Initialize error message buffer (at end of core). 238 */ 239 240 /* msgbufphys was setup during the secondary boot strap */ 241 for (loop = 0; loop < btoc(MSGBUFSIZE); ++loop) 242 pmap_kenter_pa((vaddr_t)msgbufaddr + loop * PAGE_SIZE, 243 msgbufphys + loop * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE); 244 pmap_update(pmap_kernel()); 245 initmsgbuf(msgbufaddr, round_page(MSGBUFSIZE)); 246 247 /* 248 * Identify ourselves for the msgbuf (everything printed earlier will 249 * not be buffered). 250 */ 251 printf("%s%s", copyright, version); 252 253 format_bytes(pbuf, sizeof(pbuf), arm_ptob(physmem)); 254 printf("total memory = %s\n", pbuf); 255 256 minaddr = 0; 257 258 /* 259 * Allocate a submap for exec arguments. This map effectively 260 * limits the number of processes exec'ing at any time. 261 */ 262 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 263 16*NCARGS, VM_MAP_PAGEABLE, false, NULL); 264 265 /* 266 * Allocate a submap for physio 267 */ 268 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 269 VM_PHYS_SIZE, 0, false, NULL); 270 271 /* 272 * Finally, allocate mbuf cluster submap. 273 */ 274 mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 275 nmbclusters * mclbytes, VM_MAP_INTRSAFE, 276 false, NULL); 277 278 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 279 printf("avail memory = %s\n", pbuf); 280 281 curpcb = &lwp0.l_addr->u_pcb; 282 curpcb->pcb_flags = 0; 283 curpcb->pcb_un.un_32.pcb32_und_sp = (u_int)lwp0.l_addr + 284 USPACE_UNDEF_STACK_TOP; 285 curpcb->pcb_un.un_32.pcb32_sp = (u_int)lwp0.l_addr + 286 USPACE_SVC_STACK_TOP; 287 288 curpcb->pcb_tf = (struct trapframe *)curpcb->pcb_un.un_32.pcb32_sp - 1; 289 } 290 291 /* 292 * machine dependent system variables. 293 */ 294 static int 295 sysctl_machdep_booted_device(SYSCTLFN_ARGS) 296 { 297 struct sysctlnode node; 298 299 if (booted_device == NULL) 300 return (EOPNOTSUPP); 301 302 node = *rnode; 303 node.sysctl_data = booted_device->dv_xname; 304 node.sysctl_size = strlen(booted_device->dv_xname) + 1; 305 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 306 } 307 308 static int 309 sysctl_machdep_booted_kernel(SYSCTLFN_ARGS) 310 { 311 struct sysctlnode node; 312 313 if (booted_kernel == NULL || booted_kernel[0] == '\0') 314 return (EOPNOTSUPP); 315 316 node = *rnode; 317 node.sysctl_data = booted_kernel; 318 node.sysctl_size = strlen(booted_kernel) + 1; 319 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 320 } 321 322 static int 323 sysctl_machdep_powersave(SYSCTLFN_ARGS) 324 { 325 struct sysctlnode node = *rnode; 326 int error, newval; 327 328 newval = cpu_do_powersave; 329 node.sysctl_data = &newval; 330 if (cpufuncs.cf_sleep == (void *) cpufunc_nullop) 331 node.sysctl_flags &= ~CTLFLAG_READWRITE; 332 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 333 if (error || newp == NULL || newval == cpu_do_powersave) 334 return (error); 335 336 if (newval < 0 || newval > 1) 337 return (EINVAL); 338 cpu_do_powersave = newval; 339 340 return (0); 341 } 342 343 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup") 344 { 345 346 sysctl_createv(clog, 0, NULL, NULL, 347 CTLFLAG_PERMANENT, 348 CTLTYPE_NODE, "machdep", NULL, 349 NULL, 0, NULL, 0, 350 CTL_MACHDEP, CTL_EOL); 351 352 sysctl_createv(clog, 0, NULL, NULL, 353 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 354 CTLTYPE_INT, "debug", NULL, 355 NULL, 0, &kernel_debug, 0, 356 CTL_MACHDEP, CPU_DEBUG, CTL_EOL); 357 sysctl_createv(clog, 0, NULL, NULL, 358 CTLFLAG_PERMANENT, 359 CTLTYPE_STRING, "booted_device", NULL, 360 sysctl_machdep_booted_device, 0, NULL, 0, 361 CTL_MACHDEP, CPU_BOOTED_DEVICE, CTL_EOL); 362 sysctl_createv(clog, 0, NULL, NULL, 363 CTLFLAG_PERMANENT, 364 CTLTYPE_STRING, "booted_kernel", NULL, 365 sysctl_machdep_booted_kernel, 0, NULL, 0, 366 CTL_MACHDEP, CPU_BOOTED_KERNEL, CTL_EOL); 367 sysctl_createv(clog, 0, NULL, NULL, 368 CTLFLAG_PERMANENT, 369 CTLTYPE_STRUCT, "console_device", NULL, 370 sysctl_consdev, 0, NULL, sizeof(dev_t), 371 CTL_MACHDEP, CPU_CONSDEV, CTL_EOL); 372 sysctl_createv(clog, 0, NULL, NULL, 373 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 374 CTLTYPE_INT, "powersave", NULL, 375 sysctl_machdep_powersave, 0, &cpu_do_powersave, 0, 376 CTL_MACHDEP, CPU_POWERSAVE, CTL_EOL); 377 } 378 379 void 380 parse_mi_bootargs(args) 381 char *args; 382 { 383 int integer; 384 385 if (get_bootconf_option(args, "single", BOOTOPT_TYPE_BOOLEAN, &integer) 386 || get_bootconf_option(args, "-s", BOOTOPT_TYPE_BOOLEAN, &integer)) 387 if (integer) 388 boothowto |= RB_SINGLE; 389 if (get_bootconf_option(args, "kdb", BOOTOPT_TYPE_BOOLEAN, &integer) 390 || get_bootconf_option(args, "-k", BOOTOPT_TYPE_BOOLEAN, &integer)) 391 if (integer) 392 boothowto |= RB_KDB; 393 if (get_bootconf_option(args, "ask", BOOTOPT_TYPE_BOOLEAN, &integer) 394 || get_bootconf_option(args, "-a", BOOTOPT_TYPE_BOOLEAN, &integer)) 395 if (integer) 396 boothowto |= RB_ASKNAME; 397 398 #ifdef PMAP_DEBUG 399 if (get_bootconf_option(args, "pmapdebug", BOOTOPT_TYPE_INT, &integer)) { 400 pmap_debug_level = integer; 401 pmap_debug(pmap_debug_level); 402 } 403 #endif /* PMAP_DEBUG */ 404 405 /* if (get_bootconf_option(args, "nbuf", BOOTOPT_TYPE_INT, &integer)) 406 bufpages = integer;*/ 407 408 #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE) 409 if (get_bootconf_option(args, "memorydisc", BOOTOPT_TYPE_INT, &integer) 410 || get_bootconf_option(args, "memorydisk", BOOTOPT_TYPE_INT, &integer)) { 411 md_root_size = integer; 412 md_root_size *= 1024; 413 if (md_root_size < 32*1024) 414 md_root_size = 32*1024; 415 if (md_root_size > 2048*1024) 416 md_root_size = 2048*1024; 417 } 418 #endif /* NMD && MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */ 419 420 if (get_bootconf_option(args, "quiet", BOOTOPT_TYPE_BOOLEAN, &integer) 421 || get_bootconf_option(args, "-q", BOOTOPT_TYPE_BOOLEAN, &integer)) 422 if (integer) 423 boothowto |= AB_QUIET; 424 if (get_bootconf_option(args, "verbose", BOOTOPT_TYPE_BOOLEAN, &integer) 425 || get_bootconf_option(args, "-v", BOOTOPT_TYPE_BOOLEAN, &integer)) 426 if (integer) 427 boothowto |= AB_VERBOSE; 428 } 429 430 void 431 cpu_need_resched(struct cpu_info *ci, int flags) 432 { 433 bool immed = (flags & RESCHED_IMMED) != 0; 434 435 if (ci->ci_want_resched && !immed) 436 return; 437 438 ci->ci_want_resched = 1; 439 if (curlwp != ci->ci_data.cpu_idlelwp) 440 setsoftast(); 441 } 442
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