arm32_machdep.c revision 1.6.2.5
1 /* $NetBSD: arm32_machdep.c,v 1.6.2.5 2002/02/28 04:07:20 nathanw 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 "opt_mdsize.h" 69 #include "md.h" 70 71 struct vm_map *exec_map = NULL; 72 struct vm_map *mb_map = NULL; 73 struct vm_map *phys_map = NULL; 74 75 extern int physmem; 76 77 #ifndef PMAP_STATIC_L1S 78 extern int max_processes; 79 #endif /* !PMAP_STATIC_L1S */ 80 #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MINIROOTSIZE) 81 extern u_int memory_disc_size; /* Memory disc size */ 82 #endif /* NMD && MEMORY_DISK_HOOKS && !MINIROOTSIZE */ 83 84 pv_addr_t systempage; 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 94 extern pt_entry_t msgbufpte; 95 caddr_t msgbufaddr; 96 extern paddr_t msgbufphys; 97 98 int kernel_debug = 0; 99 100 struct user *proc0paddr; 101 102 /* exported variable to be filled in by the bootloaders */ 103 char *booted_kernel; 104 105 106 /* Prototypes */ 107 108 u_long strtoul __P((const char *s, char **ptr, int base)); 109 void data_abort_handler __P((trapframe_t *frame)); 110 void prefetch_abort_handler __P((trapframe_t *frame)); 111 void zero_page_readonly __P((void)); 112 void zero_page_readwrite __P((void)); 113 extern void configure __P((void)); 114 115 /* 116 * Debug function just to park the CPU 117 */ 118 119 void 120 halt() 121 { 122 while (1) 123 cpu_sleep(0); 124 } 125 126 127 /* Sync the discs and unmount the filesystems */ 128 129 void 130 bootsync(void) 131 { 132 static int bootsyncdone = 0; 133 134 if (bootsyncdone) return; 135 136 bootsyncdone = 1; 137 138 /* Make sure we can still manage to do things */ 139 if (GetCPSR() & I32_bit) { 140 /* 141 * If we get here then boot has been called without RB_NOSYNC 142 * and interrupts were disabled. This means the boot() call 143 * did not come from a user process e.g. shutdown, but must 144 * have come from somewhere in the kernel. 145 */ 146 IRQenable; 147 printf("Warning IRQ's disabled during boot()\n"); 148 } 149 150 vfs_shutdown(); 151 } 152 153 /* 154 * void cpu_startup(void) 155 * 156 * Machine dependant startup code. 157 * 158 */ 159 160 void 161 cpu_startup() 162 { 163 int loop; 164 paddr_t minaddr; 165 paddr_t maxaddr; 166 caddr_t sysbase; 167 caddr_t size; 168 vsize_t bufsize; 169 int base, residual; 170 char pbuf[9]; 171 172 proc0paddr = (struct user *)kernelstack.pv_va; 173 lwp0.l_addr = proc0paddr; 174 175 /* Set the cpu control register */ 176 cpu_setup(boot_args); 177 178 /* All domains MUST be clients, permissions are VERY important */ 179 cpu_domains(DOMAIN_CLIENT); 180 181 /* Lock down zero page */ 182 zero_page_readonly(); 183 184 /* 185 * Give pmap a chance to set up a few more things now the vm 186 * is initialised 187 */ 188 pmap_postinit(); 189 190 /* 191 * Initialize error message buffer (at end of core). 192 */ 193 194 /* msgbufphys was setup during the secondary boot strap */ 195 for (loop = 0; loop < btoc(MSGBUFSIZE); ++loop) 196 pmap_kenter_pa((vaddr_t)msgbufaddr + loop * NBPG, 197 msgbufphys + loop * NBPG, VM_PROT_READ|VM_PROT_WRITE); 198 pmap_update(pmap_kernel()); 199 initmsgbuf(msgbufaddr, round_page(MSGBUFSIZE)); 200 201 /* 202 * Identify ourselves for the msgbuf (everything printed earlier will 203 * not be buffered). 204 */ 205 printf(version); 206 207 format_bytes(pbuf, sizeof(pbuf), arm_page_to_byte(physmem)); 208 printf("total memory = %s\n", pbuf); 209 210 /* 211 * Find out how much space we need, allocate it, 212 * and then give everything true virtual addresses. 213 */ 214 size = allocsys(NULL, NULL); 215 sysbase = (caddr_t)uvm_km_zalloc(kernel_map, round_page((vaddr_t)size)); 216 if (sysbase == 0) 217 panic( 218 "cpu_startup: no room for system tables; %d bytes required", 219 (u_int)size); 220 if ((caddr_t)((allocsys(sysbase, NULL) - sysbase)) != size) 221 panic("cpu_startup: system table size inconsistency"); 222 223 /* 224 * Now allocate buffers proper. They are different than the above 225 * in that they usually occupy more virtual memory than physical. 226 */ 227 bufsize = MAXBSIZE * nbuf; 228 if (uvm_map(kernel_map, (vaddr_t *)&buffers, round_page(bufsize), 229 NULL, UVM_UNKNOWN_OFFSET, 0, 230 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 231 UVM_ADV_NORMAL, 0)) != 0) 232 panic("cpu_startup: cannot allocate UVM space for buffers"); 233 minaddr = (vaddr_t)buffers; 234 if ((bufpages / nbuf) >= btoc(MAXBSIZE)) { 235 /* don't want to alloc more physical mem than needed */ 236 bufpages = btoc(MAXBSIZE) * nbuf; 237 } 238 239 base = bufpages / nbuf; 240 residual = bufpages % nbuf; 241 for (loop = 0; loop < nbuf; ++loop) { 242 vsize_t curbufsize; 243 vaddr_t curbuf; 244 struct vm_page *pg; 245 246 /* 247 * Each buffer has MAXBSIZE bytes of VM space allocated. Of 248 * that MAXBSIZE space, we allocate and map (base+1) pages 249 * for the first "residual" buffers, and then we allocate 250 * "base" pages for the rest. 251 */ 252 curbuf = (vaddr_t) buffers + (loop * MAXBSIZE); 253 curbufsize = NBPG * ((loop < residual) ? (base+1) : base); 254 255 while (curbufsize) { 256 pg = uvm_pagealloc(NULL, 0, NULL, 0); 257 if (pg == NULL) 258 panic("cpu_startup: not enough memory for buffer cache"); 259 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 260 VM_PROT_READ|VM_PROT_WRITE); 261 curbuf += PAGE_SIZE; 262 curbufsize -= PAGE_SIZE; 263 } 264 } 265 pmap_update(pmap_kernel()); 266 267 /* 268 * Allocate a submap for exec arguments. This map effectively 269 * limits the number of processes exec'ing at any time. 270 */ 271 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 272 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 273 274 /* 275 * Allocate a submap for physio 276 */ 277 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 278 VM_PHYS_SIZE, 0, FALSE, NULL); 279 280 /* 281 * Finally, allocate mbuf cluster submap. 282 */ 283 mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 284 nmbclusters * mclbytes, VM_MAP_INTRSAFE, 285 FALSE, NULL); 286 287 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 288 printf("avail memory = %s\n", pbuf); 289 format_bytes(pbuf, sizeof(pbuf), bufpages * NBPG); 290 printf("using %d buffers containing %s of memory\n", nbuf, pbuf); 291 292 /* 293 * Set up buffers, so they can be used to read disk labels. 294 */ 295 bufinit(); 296 297 curpcb = &lwp0.l_addr->u_pcb; 298 curpcb->pcb_flags = 0; 299 curpcb->pcb_un.un_32.pcb32_und_sp = (u_int)lwp0.l_addr + 300 USPACE_UNDEF_STACK_TOP; 301 curpcb->pcb_un.un_32.pcb32_sp = (u_int)lwp0.l_addr + 302 USPACE_SVC_STACK_TOP; 303 (void) pmap_extract(pmap_kernel(), (vaddr_t)(pmap_kernel())->pm_pdir, 304 (paddr_t *)&curpcb->pcb_pagedir); 305 306 curpcb->pcb_tf = (struct trapframe *)curpcb->pcb_un.un_32.pcb32_sp - 1; 307 } 308 309 /* 310 * Modify the current mapping for zero page to make it read only 311 * 312 * This routine is only used until things start forking. Then new 313 * system pages are mapped read only in pmap_enter(). 314 */ 315 316 void 317 zero_page_readonly() 318 { 319 WriteWord(PROCESS_PAGE_TBLS_BASE + 0, 320 L2_PTE((systempage.pv_pa & PG_FRAME), AP_KR)); 321 cpu_tlb_flushID_SE(0x00000000); 322 } 323 324 325 /* 326 * Modify the current mapping for zero page to make it read/write 327 * 328 * This routine is only used until things start forking. Then system 329 * pages belonging to user processes are never made writable. 330 */ 331 332 void 333 zero_page_readwrite() 334 { 335 WriteWord(PROCESS_PAGE_TBLS_BASE + 0, 336 L2_PTE((systempage.pv_pa & PG_FRAME), AP_KRW)); 337 cpu_tlb_flushID_SE(0x00000000); 338 } 339 340 341 /* 342 * machine dependent system variables. 343 */ 344 345 int 346 cpu_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 347 int *name; 348 u_int namelen; 349 void *oldp; 350 size_t *oldlenp; 351 void *newp; 352 size_t newlen; 353 struct proc *p; 354 { 355 /* all sysctl names at this level are terminal */ 356 if (namelen != 1) 357 return (ENOTDIR); /* overloaded */ 358 359 switch (name[0]) { 360 case CPU_DEBUG: 361 return(sysctl_int(oldp, oldlenp, newp, newlen, &kernel_debug)); 362 363 case CPU_BOOTED_DEVICE: 364 if (booted_device != NULL) 365 return (sysctl_rdstring(oldp, oldlenp, newp, 366 booted_device->dv_xname)); 367 return (EOPNOTSUPP); 368 369 case CPU_CONSDEV: { 370 dev_t consdev; 371 if (cn_tab != NULL) 372 consdev = cn_tab->cn_dev; 373 else 374 consdev = NODEV; 375 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 376 sizeof consdev)); 377 } 378 case CPU_BOOTED_KERNEL: { 379 if (booted_kernel != NULL && booted_kernel[0] != '\0') 380 return sysctl_rdstring(oldp, oldlenp, newp, 381 booted_kernel); 382 return (EOPNOTSUPP); 383 } 384 385 default: 386 return (EOPNOTSUPP); 387 } 388 /* NOTREACHED */ 389 } 390 391 void 392 parse_mi_bootargs(args) 393 char *args; 394 { 395 int integer; 396 397 if (get_bootconf_option(args, "single", BOOTOPT_TYPE_BOOLEAN, &integer) 398 || get_bootconf_option(args, "-s", BOOTOPT_TYPE_BOOLEAN, &integer)) 399 if (integer) 400 boothowto |= RB_SINGLE; 401 if (get_bootconf_option(args, "kdb", BOOTOPT_TYPE_BOOLEAN, &integer) 402 || get_bootconf_option(args, "-k", BOOTOPT_TYPE_BOOLEAN, &integer)) 403 if (integer) 404 boothowto |= RB_KDB; 405 if (get_bootconf_option(args, "ask", BOOTOPT_TYPE_BOOLEAN, &integer) 406 || get_bootconf_option(args, "-a", BOOTOPT_TYPE_BOOLEAN, &integer)) 407 if (integer) 408 boothowto |= RB_ASKNAME; 409 410 #ifdef PMAP_DEBUG 411 if (get_bootconf_option(args, "pmapdebug", BOOTOPT_TYPE_INT, &integer)) { 412 pmap_debug_level = integer; 413 pmap_debug(pmap_debug_level); 414 } 415 #endif /* PMAP_DEBUG */ 416 417 /* if (get_bootconf_option(args, "nbuf", BOOTOPT_TYPE_INT, &integer)) 418 bufpages = integer;*/ 419 420 #ifndef PMAP_STATIC_L1S 421 if (get_bootconf_option(args, "maxproc", BOOTOPT_TYPE_INT, &integer)) { 422 max_processes = integer; 423 if (max_processes < 16) 424 max_processes = 16; 425 /* Limit is PDSIZE * (max_processes + 1) <= 4MB */ 426 if (max_processes > 255) 427 max_processes = 255; 428 } 429 #endif /* !PMAP_STATUC_L1S */ 430 #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MINIROOTSIZE) 431 if (get_bootconf_option(args, "memorydisc", BOOTOPT_TYPE_INT, &integer) 432 || get_bootconf_option(args, "memorydisk", BOOTOPT_TYPE_INT, &integer)) { 433 memory_disc_size = integer; 434 memory_disc_size *= 1024; 435 if (memory_disc_size < 32*1024) 436 memory_disc_size = 32*1024; 437 if (memory_disc_size > 2048*1024) 438 memory_disc_size = 2048*1024; 439 } 440 #endif /* NMD && MEMORY_DISK_HOOKS && !MINIROOTSIZE */ 441 442 if (get_bootconf_option(args, "quiet", BOOTOPT_TYPE_BOOLEAN, &integer) 443 || get_bootconf_option(args, "-q", BOOTOPT_TYPE_BOOLEAN, &integer)) 444 if (integer) 445 boothowto |= AB_QUIET; 446 if (get_bootconf_option(args, "verbose", BOOTOPT_TYPE_BOOLEAN, &integer) 447 || get_bootconf_option(args, "-v", BOOTOPT_TYPE_BOOLEAN, &integer)) 448 if (integer) 449 boothowto |= AB_VERBOSE; 450 } 451 452 /* End of machdep.c */ 453
Indexes created Mon Oct 20 08:09:54 GMT 2025