arm32_machdep.c revision 1.21
1 /* $NetBSD: arm32_machdep.c,v 1.21 2002/04/02 05:30:39 lukem 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 "opt_md.h" 45 #include "opt_pmap_debug.h" 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/reboot.h> 50 #include <sys/proc.h> 51 #include <sys/user.h> 52 #include <sys/kernel.h> 53 #include <sys/mbuf.h> 54 #include <sys/mount.h> 55 #include <sys/buf.h> 56 #include <sys/msgbuf.h> 57 #include <sys/device.h> 58 #include <uvm/uvm_extern.h> 59 #include <sys/sysctl.h> 60 61 #include <dev/cons.h> 62 63 #include <arm/arm32/katelib.h> 64 #include <arm/arm32/machdep.h> 65 #include <machine/bootconfig.h> 66 67 #include "opt_ipkdb.h" 68 #include "md.h" 69 70 struct vm_map *exec_map = NULL; 71 struct vm_map *mb_map = NULL; 72 struct vm_map *phys_map = NULL; 73 74 extern int physmem; 75 76 #ifndef PMAP_STATIC_L1S 77 extern int max_processes; 78 #endif /* !PMAP_STATIC_L1S */ 79 #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE) 80 extern u_int memory_disc_size; /* Memory disc size */ 81 #endif /* NMD && MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */ 82 83 pv_addr_t systempage; 84 pv_addr_t kernelstack; 85 86 /* the following is used externally (sysctl_hw) */ 87 char machine[] = MACHINE; /* from <machine/param.h> */ 88 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 89 90 /* Our exported CPU info; we can have only one. */ 91 struct cpu_info cpu_info_store; 92 93 caddr_t msgbufaddr; 94 extern paddr_t msgbufphys; 95 96 int kernel_debug = 0; 97 98 struct user *proc0paddr; 99 100 /* exported variable to be filled in by the bootloaders */ 101 char *booted_kernel; 102 103 104 /* Prototypes */ 105 106 u_long strtoul __P((const char *s, char **ptr, int base)); 107 void data_abort_handler __P((trapframe_t *frame)); 108 void prefetch_abort_handler __P((trapframe_t *frame)); 109 void zero_page_readonly __P((void)); 110 void zero_page_readwrite __P((void)); 111 extern void configure __P((void)); 112 113 /* 114 * Debug function just to park the CPU 115 */ 116 117 void 118 halt() 119 { 120 while (1) 121 cpu_sleep(0); 122 } 123 124 125 /* Sync the discs and unmount the filesystems */ 126 127 void 128 bootsync(void) 129 { 130 static int bootsyncdone = 0; 131 132 if (bootsyncdone) return; 133 134 bootsyncdone = 1; 135 136 /* Make sure we can still manage to do things */ 137 if (GetCPSR() & I32_bit) { 138 /* 139 * If we get here then boot has been called without RB_NOSYNC 140 * and interrupts were disabled. This means the boot() call 141 * did not come from a user process e.g. shutdown, but must 142 * have come from somewhere in the kernel. 143 */ 144 IRQenable; 145 printf("Warning IRQ's disabled during boot()\n"); 146 } 147 148 vfs_shutdown(); 149 } 150 151 /* 152 * void cpu_startup(void) 153 * 154 * Machine dependant startup code. 155 * 156 */ 157 158 void 159 cpu_startup() 160 { 161 int loop; 162 paddr_t minaddr; 163 paddr_t maxaddr; 164 caddr_t sysbase; 165 caddr_t size; 166 vsize_t bufsize; 167 int base, residual; 168 char pbuf[9]; 169 170 proc0paddr = (struct user *)kernelstack.pv_va; 171 proc0.p_addr = proc0paddr; 172 173 /* Set the cpu control register */ 174 cpu_setup(boot_args); 175 176 /* All domains MUST be clients, permissions are VERY important */ 177 cpu_domains(DOMAIN_CLIENT); 178 179 /* Lock down zero page */ 180 zero_page_readonly(); 181 182 /* 183 * Give pmap a chance to set up a few more things now the vm 184 * is initialised 185 */ 186 pmap_postinit(); 187 188 /* 189 * Initialize error message buffer (at end of core). 190 */ 191 192 /* msgbufphys was setup during the secondary boot strap */ 193 for (loop = 0; loop < btoc(MSGBUFSIZE); ++loop) 194 pmap_kenter_pa((vaddr_t)msgbufaddr + loop * NBPG, 195 msgbufphys + loop * NBPG, VM_PROT_READ|VM_PROT_WRITE); 196 pmap_update(pmap_kernel()); 197 initmsgbuf(msgbufaddr, round_page(MSGBUFSIZE)); 198 199 /* 200 * Identify ourselves for the msgbuf (everything printed earlier will 201 * not be buffered). 202 */ 203 printf(version); 204 205 format_bytes(pbuf, sizeof(pbuf), arm_ptob(physmem)); 206 printf("total memory = %s\n", pbuf); 207 208 /* 209 * Find out how much space we need, allocate it, 210 * and then give everything true virtual addresses. 211 */ 212 size = allocsys(NULL, NULL); 213 sysbase = (caddr_t)uvm_km_zalloc(kernel_map, round_page((vaddr_t)size)); 214 if (sysbase == 0) 215 panic( 216 "cpu_startup: no room for system tables; %d bytes required", 217 (u_int)size); 218 if ((caddr_t)((allocsys(sysbase, NULL) - sysbase)) != size) 219 panic("cpu_startup: system table size inconsistency"); 220 221 /* 222 * Now allocate buffers proper. They are different than the above 223 * in that they usually occupy more virtual memory than physical. 224 */ 225 bufsize = MAXBSIZE * nbuf; 226 if (uvm_map(kernel_map, (vaddr_t *)&buffers, round_page(bufsize), 227 NULL, UVM_UNKNOWN_OFFSET, 0, 228 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 229 UVM_ADV_NORMAL, 0)) != 0) 230 panic("cpu_startup: cannot allocate UVM space for buffers"); 231 minaddr = (vaddr_t)buffers; 232 if ((bufpages / nbuf) >= btoc(MAXBSIZE)) { 233 /* don't want to alloc more physical mem than needed */ 234 bufpages = btoc(MAXBSIZE) * nbuf; 235 } 236 237 base = bufpages / nbuf; 238 residual = bufpages % nbuf; 239 for (loop = 0; loop < nbuf; ++loop) { 240 vsize_t curbufsize; 241 vaddr_t curbuf; 242 struct vm_page *pg; 243 244 /* 245 * Each buffer has MAXBSIZE bytes of VM space allocated. Of 246 * that MAXBSIZE space, we allocate and map (base+1) pages 247 * for the first "residual" buffers, and then we allocate 248 * "base" pages for the rest. 249 */ 250 curbuf = (vaddr_t) buffers + (loop * MAXBSIZE); 251 curbufsize = NBPG * ((loop < residual) ? (base+1) : base); 252 253 while (curbufsize) { 254 pg = uvm_pagealloc(NULL, 0, NULL, 0); 255 if (pg == NULL) 256 panic("cpu_startup: not enough memory for buffer cache"); 257 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 258 VM_PROT_READ|VM_PROT_WRITE); 259 curbuf += PAGE_SIZE; 260 curbufsize -= PAGE_SIZE; 261 } 262 } 263 pmap_update(pmap_kernel()); 264 265 /* 266 * Allocate a submap for exec arguments. This map effectively 267 * limits the number of processes exec'ing at any time. 268 */ 269 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 270 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 271 272 /* 273 * Allocate a submap for physio 274 */ 275 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 276 VM_PHYS_SIZE, 0, FALSE, NULL); 277 278 /* 279 * Finally, allocate mbuf cluster submap. 280 */ 281 mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 282 nmbclusters * mclbytes, VM_MAP_INTRSAFE, 283 FALSE, NULL); 284 285 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 286 printf("avail memory = %s\n", pbuf); 287 format_bytes(pbuf, sizeof(pbuf), bufpages * NBPG); 288 printf("using %d buffers containing %s of memory\n", nbuf, pbuf); 289 290 /* 291 * Set up buffers, so they can be used to read disk labels. 292 */ 293 bufinit(); 294 295 curpcb = &proc0.p_addr->u_pcb; 296 curpcb->pcb_flags = 0; 297 curpcb->pcb_un.un_32.pcb32_und_sp = (u_int)proc0.p_addr + 298 USPACE_UNDEF_STACK_TOP; 299 curpcb->pcb_un.un_32.pcb32_sp = (u_int)proc0.p_addr + 300 USPACE_SVC_STACK_TOP; 301 (void) pmap_extract(pmap_kernel(), (vaddr_t)(pmap_kernel())->pm_pdir, 302 (paddr_t *)&curpcb->pcb_pagedir); 303 304 curpcb->pcb_tf = (struct trapframe *)curpcb->pcb_un.un_32.pcb32_sp - 1; 305 } 306 307 /* 308 * Modify the current mapping for zero page to make it read only 309 * 310 * This routine is only used until things start forking. Then new 311 * system pages are mapped read only in pmap_enter(). 312 */ 313 314 void 315 zero_page_readonly() 316 { 317 WriteWord(PTE_BASE + 0, L2_PTE((systempage.pv_pa & PG_FRAME), AP_KR)); 318 cpu_tlb_flushID_SE(0x00000000); 319 } 320 321 322 /* 323 * Modify the current mapping for zero page to make it read/write 324 * 325 * This routine is only used until things start forking. Then system 326 * pages belonging to user processes are never made writable. 327 */ 328 329 void 330 zero_page_readwrite() 331 { 332 WriteWord(PTE_BASE + 0, L2_PTE((systempage.pv_pa & PG_FRAME), AP_KRW)); 333 cpu_tlb_flushID_SE(0x00000000); 334 } 335 336 337 /* 338 * machine dependent system variables. 339 */ 340 341 int 342 cpu_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 343 int *name; 344 u_int namelen; 345 void *oldp; 346 size_t *oldlenp; 347 void *newp; 348 size_t newlen; 349 struct proc *p; 350 { 351 /* all sysctl names at this level are terminal */ 352 if (namelen != 1) 353 return (ENOTDIR); /* overloaded */ 354 355 switch (name[0]) { 356 case CPU_DEBUG: 357 return(sysctl_int(oldp, oldlenp, newp, newlen, &kernel_debug)); 358 359 case CPU_BOOTED_DEVICE: 360 if (booted_device != NULL) 361 return (sysctl_rdstring(oldp, oldlenp, newp, 362 booted_device->dv_xname)); 363 return (EOPNOTSUPP); 364 365 case CPU_CONSDEV: { 366 dev_t consdev; 367 if (cn_tab != NULL) 368 consdev = cn_tab->cn_dev; 369 else 370 consdev = NODEV; 371 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 372 sizeof consdev)); 373 } 374 case CPU_BOOTED_KERNEL: { 375 if (booted_kernel != NULL && booted_kernel[0] != '\0') 376 return sysctl_rdstring(oldp, oldlenp, newp, 377 booted_kernel); 378 return (EOPNOTSUPP); 379 } 380 381 default: 382 return (EOPNOTSUPP); 383 } 384 /* NOTREACHED */ 385 } 386 387 void 388 parse_mi_bootargs(args) 389 char *args; 390 { 391 int integer; 392 393 if (get_bootconf_option(args, "single", BOOTOPT_TYPE_BOOLEAN, &integer) 394 || get_bootconf_option(args, "-s", BOOTOPT_TYPE_BOOLEAN, &integer)) 395 if (integer) 396 boothowto |= RB_SINGLE; 397 if (get_bootconf_option(args, "kdb", BOOTOPT_TYPE_BOOLEAN, &integer) 398 || get_bootconf_option(args, "-k", BOOTOPT_TYPE_BOOLEAN, &integer)) 399 if (integer) 400 boothowto |= RB_KDB; 401 if (get_bootconf_option(args, "ask", BOOTOPT_TYPE_BOOLEAN, &integer) 402 || get_bootconf_option(args, "-a", BOOTOPT_TYPE_BOOLEAN, &integer)) 403 if (integer) 404 boothowto |= RB_ASKNAME; 405 406 #ifdef PMAP_DEBUG 407 if (get_bootconf_option(args, "pmapdebug", BOOTOPT_TYPE_INT, &integer)) { 408 pmap_debug_level = integer; 409 pmap_debug(pmap_debug_level); 410 } 411 #endif /* PMAP_DEBUG */ 412 413 /* if (get_bootconf_option(args, "nbuf", BOOTOPT_TYPE_INT, &integer)) 414 bufpages = integer;*/ 415 416 #ifndef PMAP_STATIC_L1S 417 if (get_bootconf_option(args, "maxproc", BOOTOPT_TYPE_INT, &integer)) { 418 max_processes = integer; 419 if (max_processes < 16) 420 max_processes = 16; 421 /* Limit is PDSIZE * (max_processes + 1) <= 4MB */ 422 if (max_processes > 255) 423 max_processes = 255; 424 } 425 #endif /* !PMAP_STATUC_L1S */ 426 #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE) 427 if (get_bootconf_option(args, "memorydisc", BOOTOPT_TYPE_INT, &integer) 428 || get_bootconf_option(args, "memorydisk", BOOTOPT_TYPE_INT, &integer)) { 429 memory_disc_size = integer; 430 memory_disc_size *= 1024; 431 if (memory_disc_size < 32*1024) 432 memory_disc_size = 32*1024; 433 if (memory_disc_size > 2048*1024) 434 memory_disc_size = 2048*1024; 435 } 436 #endif /* NMD && MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */ 437 438 if (get_bootconf_option(args, "quiet", BOOTOPT_TYPE_BOOLEAN, &integer) 439 || get_bootconf_option(args, "-q", BOOTOPT_TYPE_BOOLEAN, &integer)) 440 if (integer) 441 boothowto |= AB_QUIET; 442 if (get_bootconf_option(args, "verbose", BOOTOPT_TYPE_BOOLEAN, &integer) 443 || get_bootconf_option(args, "-v", BOOTOPT_TYPE_BOOLEAN, &integer)) 444 if (integer) 445 boothowto |= AB_VERBOSE; 446 } 447 448 /* End of machdep.c */ 449
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