arm32_machdep.c revision 1.18
1 /* $NetBSD: arm32_machdep.c,v 1.18 2002/03/23 02:22:57 thorpej 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_SIZE) 80 extern u_int memory_disc_size; /* Memory disc size */ 81 #endif /* NMD && MEMORY_DISK_HOOKS && !MEMORY_DISK_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 extern pt_entry_t msgbufpte; 94 caddr_t msgbufaddr; 95 extern paddr_t msgbufphys; 96 97 int kernel_debug = 0; 98 99 struct user *proc0paddr; 100 101 /* exported variable to be filled in by the bootloaders */ 102 char *booted_kernel; 103 104 105 /* Prototypes */ 106 107 u_long strtoul __P((const char *s, char **ptr, int base)); 108 void data_abort_handler __P((trapframe_t *frame)); 109 void prefetch_abort_handler __P((trapframe_t *frame)); 110 void zero_page_readonly __P((void)); 111 void zero_page_readwrite __P((void)); 112 extern void configure __P((void)); 113 114 /* 115 * Debug function just to park the CPU 116 */ 117 118 void 119 halt() 120 { 121 while (1) 122 cpu_sleep(0); 123 } 124 125 126 /* Sync the discs and unmount the filesystems */ 127 128 void 129 bootsync(void) 130 { 131 static int bootsyncdone = 0; 132 133 if (bootsyncdone) return; 134 135 bootsyncdone = 1; 136 137 /* Make sure we can still manage to do things */ 138 if (GetCPSR() & I32_bit) { 139 /* 140 * If we get here then boot has been called without RB_NOSYNC 141 * and interrupts were disabled. This means the boot() call 142 * did not come from a user process e.g. shutdown, but must 143 * have come from somewhere in the kernel. 144 */ 145 IRQenable; 146 printf("Warning IRQ's disabled during boot()\n"); 147 } 148 149 vfs_shutdown(); 150 } 151 152 /* 153 * void cpu_startup(void) 154 * 155 * Machine dependant startup code. 156 * 157 */ 158 159 void 160 cpu_startup() 161 { 162 int loop; 163 paddr_t minaddr; 164 paddr_t maxaddr; 165 caddr_t sysbase; 166 caddr_t size; 167 vsize_t bufsize; 168 int base, residual; 169 char pbuf[9]; 170 171 proc0paddr = (struct user *)kernelstack.pv_va; 172 proc0.p_addr = proc0paddr; 173 174 /* Set the cpu control register */ 175 cpu_setup(boot_args); 176 177 /* All domains MUST be clients, permissions are VERY important */ 178 cpu_domains(DOMAIN_CLIENT); 179 180 /* Lock down zero page */ 181 zero_page_readonly(); 182 183 /* 184 * Give pmap a chance to set up a few more things now the vm 185 * is initialised 186 */ 187 pmap_postinit(); 188 189 /* 190 * Initialize error message buffer (at end of core). 191 */ 192 193 /* msgbufphys was setup during the secondary boot strap */ 194 for (loop = 0; loop < btoc(MSGBUFSIZE); ++loop) 195 pmap_kenter_pa((vaddr_t)msgbufaddr + loop * NBPG, 196 msgbufphys + loop * NBPG, VM_PROT_READ|VM_PROT_WRITE); 197 pmap_update(pmap_kernel()); 198 initmsgbuf(msgbufaddr, round_page(MSGBUFSIZE)); 199 200 /* 201 * Identify ourselves for the msgbuf (everything printed earlier will 202 * not be buffered). 203 */ 204 printf(version); 205 206 format_bytes(pbuf, sizeof(pbuf), arm_page_to_byte(physmem)); 207 printf("total memory = %s\n", pbuf); 208 209 /* 210 * Find out how much space we need, allocate it, 211 * and then give everything true virtual addresses. 212 */ 213 size = allocsys(NULL, NULL); 214 sysbase = (caddr_t)uvm_km_zalloc(kernel_map, round_page((vaddr_t)size)); 215 if (sysbase == 0) 216 panic( 217 "cpu_startup: no room for system tables; %d bytes required", 218 (u_int)size); 219 if ((caddr_t)((allocsys(sysbase, NULL) - sysbase)) != size) 220 panic("cpu_startup: system table size inconsistency"); 221 222 /* 223 * Now allocate buffers proper. They are different than the above 224 * in that they usually occupy more virtual memory than physical. 225 */ 226 bufsize = MAXBSIZE * nbuf; 227 if (uvm_map(kernel_map, (vaddr_t *)&buffers, round_page(bufsize), 228 NULL, UVM_UNKNOWN_OFFSET, 0, 229 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 230 UVM_ADV_NORMAL, 0)) != 0) 231 panic("cpu_startup: cannot allocate UVM space for buffers"); 232 minaddr = (vaddr_t)buffers; 233 if ((bufpages / nbuf) >= btoc(MAXBSIZE)) { 234 /* don't want to alloc more physical mem than needed */ 235 bufpages = btoc(MAXBSIZE) * nbuf; 236 } 237 238 base = bufpages / nbuf; 239 residual = bufpages % nbuf; 240 for (loop = 0; loop < nbuf; ++loop) { 241 vsize_t curbufsize; 242 vaddr_t curbuf; 243 struct vm_page *pg; 244 245 /* 246 * Each buffer has MAXBSIZE bytes of VM space allocated. Of 247 * that MAXBSIZE space, we allocate and map (base+1) pages 248 * for the first "residual" buffers, and then we allocate 249 * "base" pages for the rest. 250 */ 251 curbuf = (vaddr_t) buffers + (loop * MAXBSIZE); 252 curbufsize = NBPG * ((loop < residual) ? (base+1) : base); 253 254 while (curbufsize) { 255 pg = uvm_pagealloc(NULL, 0, NULL, 0); 256 if (pg == NULL) 257 panic("cpu_startup: not enough memory for buffer cache"); 258 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 259 VM_PROT_READ|VM_PROT_WRITE); 260 curbuf += PAGE_SIZE; 261 curbufsize -= PAGE_SIZE; 262 } 263 } 264 pmap_update(pmap_kernel()); 265 266 /* 267 * Allocate a submap for exec arguments. This map effectively 268 * limits the number of processes exec'ing at any time. 269 */ 270 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 271 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 272 273 /* 274 * Allocate a submap for physio 275 */ 276 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 277 VM_PHYS_SIZE, 0, FALSE, NULL); 278 279 /* 280 * Finally, allocate mbuf cluster submap. 281 */ 282 mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 283 nmbclusters * mclbytes, VM_MAP_INTRSAFE, 284 FALSE, NULL); 285 286 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 287 printf("avail memory = %s\n", pbuf); 288 format_bytes(pbuf, sizeof(pbuf), bufpages * NBPG); 289 printf("using %d buffers containing %s of memory\n", nbuf, pbuf); 290 291 /* 292 * Set up buffers, so they can be used to read disk labels. 293 */ 294 bufinit(); 295 296 curpcb = &proc0.p_addr->u_pcb; 297 curpcb->pcb_flags = 0; 298 curpcb->pcb_un.un_32.pcb32_und_sp = (u_int)proc0.p_addr + 299 USPACE_UNDEF_STACK_TOP; 300 curpcb->pcb_un.un_32.pcb32_sp = (u_int)proc0.p_addr + 301 USPACE_SVC_STACK_TOP; 302 (void) pmap_extract(pmap_kernel(), (vaddr_t)(pmap_kernel())->pm_pdir, 303 (paddr_t *)&curpcb->pcb_pagedir); 304 305 curpcb->pcb_tf = (struct trapframe *)curpcb->pcb_un.un_32.pcb32_sp - 1; 306 } 307 308 /* 309 * Modify the current mapping for zero page to make it read only 310 * 311 * This routine is only used until things start forking. Then new 312 * system pages are mapped read only in pmap_enter(). 313 */ 314 315 void 316 zero_page_readonly() 317 { 318 WriteWord(PTE_BASE + 0, L2_PTE((systempage.pv_pa & PG_FRAME), AP_KR)); 319 cpu_tlb_flushID_SE(0x00000000); 320 } 321 322 323 /* 324 * Modify the current mapping for zero page to make it read/write 325 * 326 * This routine is only used until things start forking. Then system 327 * pages belonging to user processes are never made writable. 328 */ 329 330 void 331 zero_page_readwrite() 332 { 333 WriteWord(PTE_BASE + 0, L2_PTE((systempage.pv_pa & PG_FRAME), AP_KRW)); 334 cpu_tlb_flushID_SE(0x00000000); 335 } 336 337 338 /* 339 * machine dependent system variables. 340 */ 341 342 int 343 cpu_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 344 int *name; 345 u_int namelen; 346 void *oldp; 347 size_t *oldlenp; 348 void *newp; 349 size_t newlen; 350 struct proc *p; 351 { 352 /* all sysctl names at this level are terminal */ 353 if (namelen != 1) 354 return (ENOTDIR); /* overloaded */ 355 356 switch (name[0]) { 357 case CPU_DEBUG: 358 return(sysctl_int(oldp, oldlenp, newp, newlen, &kernel_debug)); 359 360 case CPU_BOOTED_DEVICE: 361 if (booted_device != NULL) 362 return (sysctl_rdstring(oldp, oldlenp, newp, 363 booted_device->dv_xname)); 364 return (EOPNOTSUPP); 365 366 case CPU_CONSDEV: { 367 dev_t consdev; 368 if (cn_tab != NULL) 369 consdev = cn_tab->cn_dev; 370 else 371 consdev = NODEV; 372 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 373 sizeof consdev)); 374 } 375 case CPU_BOOTED_KERNEL: { 376 if (booted_kernel != NULL && booted_kernel[0] != '\0') 377 return sysctl_rdstring(oldp, oldlenp, newp, 378 booted_kernel); 379 return (EOPNOTSUPP); 380 } 381 382 default: 383 return (EOPNOTSUPP); 384 } 385 /* NOTREACHED */ 386 } 387 388 void 389 parse_mi_bootargs(args) 390 char *args; 391 { 392 int integer; 393 394 if (get_bootconf_option(args, "single", BOOTOPT_TYPE_BOOLEAN, &integer) 395 || get_bootconf_option(args, "-s", BOOTOPT_TYPE_BOOLEAN, &integer)) 396 if (integer) 397 boothowto |= RB_SINGLE; 398 if (get_bootconf_option(args, "kdb", BOOTOPT_TYPE_BOOLEAN, &integer) 399 || get_bootconf_option(args, "-k", BOOTOPT_TYPE_BOOLEAN, &integer)) 400 if (integer) 401 boothowto |= RB_KDB; 402 if (get_bootconf_option(args, "ask", BOOTOPT_TYPE_BOOLEAN, &integer) 403 || get_bootconf_option(args, "-a", BOOTOPT_TYPE_BOOLEAN, &integer)) 404 if (integer) 405 boothowto |= RB_ASKNAME; 406 407 #ifdef PMAP_DEBUG 408 if (get_bootconf_option(args, "pmapdebug", BOOTOPT_TYPE_INT, &integer)) { 409 pmap_debug_level = integer; 410 pmap_debug(pmap_debug_level); 411 } 412 #endif /* PMAP_DEBUG */ 413 414 /* if (get_bootconf_option(args, "nbuf", BOOTOPT_TYPE_INT, &integer)) 415 bufpages = integer;*/ 416 417 #ifndef PMAP_STATIC_L1S 418 if (get_bootconf_option(args, "maxproc", BOOTOPT_TYPE_INT, &integer)) { 419 max_processes = integer; 420 if (max_processes < 16) 421 max_processes = 16; 422 /* Limit is PDSIZE * (max_processes + 1) <= 4MB */ 423 if (max_processes > 255) 424 max_processes = 255; 425 } 426 #endif /* !PMAP_STATUC_L1S */ 427 #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_SIZE) 428 if (get_bootconf_option(args, "memorydisc", BOOTOPT_TYPE_INT, &integer) 429 || get_bootconf_option(args, "memorydisk", BOOTOPT_TYPE_INT, &integer)) { 430 memory_disc_size = integer; 431 memory_disc_size *= 1024; 432 if (memory_disc_size < 32*1024) 433 memory_disc_size = 32*1024; 434 if (memory_disc_size > 2048*1024) 435 memory_disc_size = 2048*1024; 436 } 437 #endif /* NMD && MEMORY_DISK_HOOKS && !MEMORY_DISK_SIZE */ 438 439 if (get_bootconf_option(args, "quiet", BOOTOPT_TYPE_BOOLEAN, &integer) 440 || get_bootconf_option(args, "-q", BOOTOPT_TYPE_BOOLEAN, &integer)) 441 if (integer) 442 boothowto |= AB_QUIET; 443 if (get_bootconf_option(args, "verbose", BOOTOPT_TYPE_BOOLEAN, &integer) 444 || get_bootconf_option(args, "-v", BOOTOPT_TYPE_BOOLEAN, &integer)) 445 if (integer) 446 boothowto |= AB_VERBOSE; 447 } 448 449 /* End of machdep.c */ 450
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