arm32_machdep.c revision 1.2.2.3
1 1.2.2.3 thorpej /* $NetBSD: arm32_machdep.c,v 1.2.2.3 2001/08/25 06:15:08 thorpej Exp $ */ 2 1.2.2.2 lukem 3 1.2.2.2 lukem /* 4 1.2.2.2 lukem * Copyright (c) 1994-1998 Mark Brinicombe. 5 1.2.2.2 lukem * Copyright (c) 1994 Brini. 6 1.2.2.2 lukem * All rights reserved. 7 1.2.2.2 lukem * 8 1.2.2.2 lukem * This code is derived from software written for Brini by Mark Brinicombe 9 1.2.2.2 lukem * 10 1.2.2.2 lukem * Redistribution and use in source and binary forms, with or without 11 1.2.2.2 lukem * modification, are permitted provided that the following conditions 12 1.2.2.2 lukem * are met: 13 1.2.2.2 lukem * 1. Redistributions of source code must retain the above copyright 14 1.2.2.2 lukem * notice, this list of conditions and the following disclaimer. 15 1.2.2.2 lukem * 2. Redistributions in binary form must reproduce the above copyright 16 1.2.2.2 lukem * notice, this list of conditions and the following disclaimer in the 17 1.2.2.2 lukem * documentation and/or other materials provided with the distribution. 18 1.2.2.2 lukem * 3. All advertising materials mentioning features or use of this software 19 1.2.2.2 lukem * must display the following acknowledgement: 20 1.2.2.2 lukem * This product includes software developed by Mark Brinicombe 21 1.2.2.2 lukem * for the NetBSD Project. 22 1.2.2.2 lukem * 4. The name of the company nor the name of the author may be used to 23 1.2.2.2 lukem * endorse or promote products derived from this software without specific 24 1.2.2.2 lukem * prior written permission. 25 1.2.2.2 lukem * 26 1.2.2.2 lukem * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 27 1.2.2.2 lukem * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 28 1.2.2.2 lukem * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 29 1.2.2.2 lukem * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 30 1.2.2.2 lukem * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 31 1.2.2.2 lukem * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 32 1.2.2.2 lukem * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 1.2.2.2 lukem * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 1.2.2.2 lukem * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 1.2.2.2 lukem * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 1.2.2.2 lukem * SUCH DAMAGE. 37 1.2.2.2 lukem * 38 1.2.2.2 lukem * Machine dependant functions for kernel setup 39 1.2.2.2 lukem * 40 1.2.2.2 lukem * Created : 17/09/94 41 1.2.2.2 lukem * Updated : 18/04/01 updated for new wscons 42 1.2.2.2 lukem */ 43 1.2.2.2 lukem 44 1.2.2.2 lukem #include "opt_md.h" 45 1.2.2.2 lukem #include "opt_pmap_debug.h" 46 1.2.2.2 lukem 47 1.2.2.2 lukem #include <sys/param.h> 48 1.2.2.2 lukem #include <sys/systm.h> 49 1.2.2.2 lukem #include <sys/reboot.h> 50 1.2.2.2 lukem #include <sys/proc.h> 51 1.2.2.2 lukem #include <sys/user.h> 52 1.2.2.2 lukem #include <sys/kernel.h> 53 1.2.2.2 lukem #include <sys/mbuf.h> 54 1.2.2.2 lukem #include <sys/mount.h> 55 1.2.2.2 lukem #include <sys/buf.h> 56 1.2.2.2 lukem #include <sys/msgbuf.h> 57 1.2.2.2 lukem #include <sys/device.h> 58 1.2.2.2 lukem #include <uvm/uvm_extern.h> 59 1.2.2.2 lukem #include <sys/sysctl.h> 60 1.2.2.2 lukem 61 1.2.2.2 lukem #include <dev/cons.h> 62 1.2.2.2 lukem 63 1.2.2.2 lukem #include <machine/katelib.h> 64 1.2.2.2 lukem #include <machine/pte.h> 65 1.2.2.2 lukem #include <machine/bootconfig.h> 66 1.2.2.2 lukem 67 1.2.2.2 lukem #include "opt_ipkdb.h" 68 1.2.2.2 lukem #include "opt_mdsize.h" 69 1.2.2.2 lukem #include "md.h" 70 1.2.2.2 lukem 71 1.2.2.2 lukem struct vm_map *exec_map = NULL; 72 1.2.2.2 lukem struct vm_map *mb_map = NULL; 73 1.2.2.2 lukem struct vm_map *phys_map = NULL; 74 1.2.2.2 lukem 75 1.2.2.2 lukem extern int physmem; 76 1.2.2.2 lukem 77 1.2.2.2 lukem #ifndef PMAP_STATIC_L1S 78 1.2.2.2 lukem extern int max_processes; 79 1.2.2.2 lukem #endif /* !PMAP_STATIC_L1S */ 80 1.2.2.2 lukem #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MINIROOTSIZE) 81 1.2.2.2 lukem extern u_int memory_disc_size; /* Memory disc size */ 82 1.2.2.2 lukem #endif /* NMD && MEMORY_DISK_HOOKS && !MINIROOTSIZE */ 83 1.2.2.2 lukem 84 1.2.2.2 lukem pv_addr_t systempage; 85 1.2.2.2 lukem pv_addr_t kernelstack; 86 1.2.2.2 lukem 87 1.2.2.2 lukem /* the following is used externally (sysctl_hw) */ 88 1.2.2.2 lukem char machine[] = MACHINE; /* from <machine/param.h> */ 89 1.2.2.2 lukem char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 90 1.2.2.2 lukem 91 1.2.2.2 lukem /* Our exported CPU info; we can have only one. */ 92 1.2.2.2 lukem struct cpu_info cpu_info_store; 93 1.2.2.2 lukem 94 1.2.2.2 lukem extern pt_entry_t msgbufpte; 95 1.2.2.2 lukem caddr_t msgbufaddr; 96 1.2.2.2 lukem extern paddr_t msgbufphys; 97 1.2.2.2 lukem 98 1.2.2.2 lukem int kernel_debug = 0; 99 1.2.2.2 lukem 100 1.2.2.2 lukem struct user *proc0paddr; 101 1.2.2.2 lukem 102 1.2.2.2 lukem char *booted_kernel; 103 1.2.2.2 lukem 104 1.2.2.2 lukem 105 1.2.2.2 lukem /* Prototypes */ 106 1.2.2.2 lukem 107 1.2.2.2 lukem void map_section __P((vaddr_t pt, vaddr_t va, paddr_t pa, 108 1.2.2.2 lukem int cacheable)); 109 1.2.2.2 lukem void map_pagetable __P((vaddr_t pt, vaddr_t va, paddr_t pa)); 110 1.2.2.2 lukem void map_entry __P((vaddr_t pt, vaddr_t va, paddr_t pa)); 111 1.2.2.2 lukem void map_entry_nc __P((vaddr_t pt, vaddr_t va, paddr_t pa)); 112 1.2.2.2 lukem void map_entry_ro __P((vaddr_t pt, vaddr_t va, paddr_t pa)); 113 1.2.2.2 lukem 114 1.2.2.2 lukem u_long strtoul __P((const char *s, char **ptr, int base)); 115 1.2.2.2 lukem void data_abort_handler __P((trapframe_t *frame)); 116 1.2.2.2 lukem void prefetch_abort_handler __P((trapframe_t *frame)); 117 1.2.2.2 lukem void zero_page_readonly __P((void)); 118 1.2.2.2 lukem void zero_page_readwrite __P((void)); 119 1.2.2.2 lukem extern void configure __P((void)); 120 1.2.2.2 lukem extern void dumpsys __P((void)); 121 1.2.2.2 lukem 122 1.2.2.2 lukem /* 123 1.2.2.2 lukem * Debug function just to park the CPU 124 1.2.2.2 lukem */ 125 1.2.2.2 lukem 126 1.2.2.2 lukem void 127 1.2.2.2 lukem halt() 128 1.2.2.2 lukem { 129 1.2.2.2 lukem while (1) 130 1.2.2.2 lukem cpu_sleep(0); 131 1.2.2.2 lukem } 132 1.2.2.2 lukem 133 1.2.2.2 lukem 134 1.2.2.2 lukem /* Sync the discs and unmount the filesystems */ 135 1.2.2.2 lukem 136 1.2.2.2 lukem void 137 1.2.2.2 lukem bootsync(void) 138 1.2.2.2 lukem { 139 1.2.2.2 lukem static int bootsyncdone = 0; 140 1.2.2.2 lukem 141 1.2.2.2 lukem if (bootsyncdone) return; 142 1.2.2.2 lukem 143 1.2.2.2 lukem bootsyncdone = 1; 144 1.2.2.2 lukem 145 1.2.2.2 lukem /* Make sure we can still manage to do things */ 146 1.2.2.2 lukem if (GetCPSR() & I32_bit) { 147 1.2.2.2 lukem /* 148 1.2.2.2 lukem * If we get here then boot has been called without RB_NOSYNC 149 1.2.2.2 lukem * and interrupts were disabled. This means the boot() call 150 1.2.2.2 lukem * did not come from a user process e.g. shutdown, but must 151 1.2.2.2 lukem * have come from somewhere in the kernel. 152 1.2.2.2 lukem */ 153 1.2.2.2 lukem IRQenable; 154 1.2.2.2 lukem printf("Warning IRQ's disabled during boot()\n"); 155 1.2.2.2 lukem } 156 1.2.2.2 lukem 157 1.2.2.2 lukem vfs_shutdown(); 158 1.2.2.2 lukem } 159 1.2.2.2 lukem 160 1.2.2.2 lukem /* 161 1.2.2.2 lukem * A few functions that are used to help construct the page tables 162 1.2.2.2 lukem * during the bootstrap process. 163 1.2.2.2 lukem */ 164 1.2.2.2 lukem 165 1.2.2.2 lukem void 166 1.2.2.2 lukem map_section(pagetable, va, pa, cacheable) 167 1.2.2.2 lukem vaddr_t pagetable; 168 1.2.2.2 lukem vaddr_t va; 169 1.2.2.2 lukem paddr_t pa; 170 1.2.2.2 lukem int cacheable; 171 1.2.2.2 lukem { 172 1.2.2.2 lukem #ifdef DIAGNOSTIC 173 1.2.2.2 lukem if (((va | pa) & (L1_SEC_SIZE - 1)) != 0) 174 1.2.2.2 lukem panic("initarm: Cannot allocate 1MB section on non 1MB boundry\n"); 175 1.2.2.2 lukem #endif /* DIAGNOSTIC */ 176 1.2.2.2 lukem 177 1.2.2.2 lukem if (cacheable) 178 1.2.2.2 lukem ((u_int *)pagetable)[(va >> PDSHIFT)] = 179 1.2.2.2 lukem L1_SEC((pa & PD_MASK), PT_C); 180 1.2.2.2 lukem else 181 1.2.2.2 lukem ((u_int *)pagetable)[(va >> PDSHIFT)] = 182 1.2.2.2 lukem L1_SEC((pa & PD_MASK), 0); 183 1.2.2.2 lukem } 184 1.2.2.2 lukem 185 1.2.2.2 lukem 186 1.2.2.2 lukem void 187 1.2.2.2 lukem map_pagetable(pagetable, va, pa) 188 1.2.2.2 lukem vaddr_t pagetable; 189 1.2.2.2 lukem vaddr_t va; 190 1.2.2.2 lukem paddr_t pa; 191 1.2.2.2 lukem { 192 1.2.2.2 lukem #ifdef DIAGNOSTIC 193 1.2.2.2 lukem if ((pa & 0xc00) != 0) 194 1.2.2.2 lukem panic("pagetables should be group allocated on pageboundry"); 195 1.2.2.2 lukem #endif /* DIAGNOSTIC */ 196 1.2.2.2 lukem 197 1.2.2.2 lukem ((u_int *)pagetable)[(va >> PDSHIFT) + 0] = 198 1.2.2.2 lukem L1_PTE((pa & PG_FRAME) + 0x000); 199 1.2.2.2 lukem ((u_int *)pagetable)[(va >> PDSHIFT) + 1] = 200 1.2.2.2 lukem L1_PTE((pa & PG_FRAME) + 0x400); 201 1.2.2.2 lukem ((u_int *)pagetable)[(va >> PDSHIFT) + 2] = 202 1.2.2.2 lukem L1_PTE((pa & PG_FRAME) + 0x800); 203 1.2.2.2 lukem ((u_int *)pagetable)[(va >> PDSHIFT) + 3] = 204 1.2.2.2 lukem L1_PTE((pa & PG_FRAME) + 0xc00); 205 1.2.2.2 lukem } 206 1.2.2.2 lukem 207 1.2.2.2 lukem vsize_t 208 1.2.2.2 lukem map_chunk(pd, pt, va, pa, size, acc, flg) 209 1.2.2.2 lukem vaddr_t pd; 210 1.2.2.2 lukem vaddr_t pt; 211 1.2.2.2 lukem vaddr_t va; 212 1.2.2.2 lukem paddr_t pa; 213 1.2.2.2 lukem vsize_t size; 214 1.2.2.2 lukem u_int acc; 215 1.2.2.2 lukem u_int flg; 216 1.2.2.2 lukem { 217 1.2.2.2 lukem pd_entry_t *l1pt = (pd_entry_t *)pd; 218 1.2.2.2 lukem pt_entry_t *l2pt = (pt_entry_t *)pt; 219 1.2.2.2 lukem vsize_t remain; 220 1.2.2.2 lukem u_int loop; 221 1.2.2.2 lukem 222 1.2.2.2 lukem remain = (size + (NBPG - 1)) & ~(NBPG - 1); 223 1.2.2.2 lukem #ifdef VERBOSE_INIT_ARM 224 1.2.2.2 lukem printf("map_chunk: pa=%lx va=%lx sz=%lx rem=%lx acc=%x flg=%x\n", 225 1.2.2.2 lukem pa, va, size, remain, acc, flg); 226 1.2.2.2 lukem printf("map_chunk: "); 227 1.2.2.2 lukem #endif 228 1.2.2.2 lukem size = remain; 229 1.2.2.2 lukem 230 1.2.2.2 lukem while (remain > 0) { 231 1.2.2.2 lukem /* Can we do a section mapping ? */ 232 1.2.2.2 lukem if (l1pt && !((pa | va) & (L1_SEC_SIZE - 1)) 233 1.2.2.2 lukem && remain >= L1_SEC_SIZE) { 234 1.2.2.2 lukem #ifdef VERBOSE_INIT_ARM 235 1.2.2.2 lukem printf("S"); 236 1.2.2.2 lukem #endif 237 1.2.2.2 lukem l1pt[(va >> PDSHIFT)] = L1_SECPTE(pa, acc, flg); 238 1.2.2.2 lukem va += L1_SEC_SIZE; 239 1.2.2.2 lukem pa += L1_SEC_SIZE; 240 1.2.2.2 lukem remain -= L1_SEC_SIZE; 241 1.2.2.2 lukem } else 242 1.2.2.2 lukem /* Can we do a large page mapping ? */ 243 1.2.2.2 lukem if (!((pa | va) & (L2_LPAGE_SIZE - 1)) 244 1.2.2.2 lukem && (remain >= L2_LPAGE_SIZE)) { 245 1.2.2.2 lukem #ifdef VERBOSE_INIT_ARM 246 1.2.2.2 lukem printf("L"); 247 1.2.2.2 lukem #endif 248 1.2.2.2 lukem for (loop = 0; loop < 16; ++loop) 249 1.2.2.2 lukem l2pt[((va >> PGSHIFT) & 0x3f0) + loop] = 250 1.2.2.2 lukem L2_LPTE(pa, acc, flg); 251 1.2.2.2 lukem va += L2_LPAGE_SIZE; 252 1.2.2.2 lukem pa += L2_LPAGE_SIZE; 253 1.2.2.2 lukem remain -= L2_LPAGE_SIZE; 254 1.2.2.2 lukem } else 255 1.2.2.2 lukem /* All we can do is a small page mapping */ 256 1.2.2.2 lukem { 257 1.2.2.2 lukem #ifdef VERBOSE_INIT_ARM 258 1.2.2.2 lukem printf("P"); 259 1.2.2.2 lukem #endif 260 1.2.2.2 lukem l2pt[((va >> PGSHIFT) & 0x3ff)] = L2_SPTE(pa, acc, flg); 261 1.2.2.2 lukem va += NBPG; 262 1.2.2.2 lukem pa += NBPG; 263 1.2.2.2 lukem remain -= NBPG; 264 1.2.2.2 lukem } 265 1.2.2.2 lukem } 266 1.2.2.2 lukem #ifdef VERBOSE_INIT_ARM 267 1.2.2.2 lukem printf("\n"); 268 1.2.2.2 lukem #endif 269 1.2.2.2 lukem return(size); 270 1.2.2.2 lukem } 271 1.2.2.2 lukem 272 1.2.2.2 lukem 273 1.2.2.2 lukem void 274 1.2.2.2 lukem map_entry(pagetable, va, pa) 275 1.2.2.2 lukem vaddr_t pagetable; 276 1.2.2.2 lukem vaddr_t va; 277 1.2.2.2 lukem paddr_t pa; 278 1.2.2.2 lukem { 279 1.2.2.2 lukem ((pt_entry_t *)pagetable)[((va >> PGSHIFT) & 0x000003ff)] = 280 1.2.2.2 lukem L2_PTE((pa & PG_FRAME), AP_KRW); 281 1.2.2.2 lukem } 282 1.2.2.2 lukem 283 1.2.2.2 lukem 284 1.2.2.2 lukem void 285 1.2.2.2 lukem map_entry_nc(pagetable, va, pa) 286 1.2.2.2 lukem vaddr_t pagetable; 287 1.2.2.2 lukem vaddr_t va; 288 1.2.2.2 lukem paddr_t pa; 289 1.2.2.2 lukem { 290 1.2.2.2 lukem ((pt_entry_t *)pagetable)[((va >> PGSHIFT) & 0x000003ff)] = 291 1.2.2.2 lukem L2_PTE_NC_NB((pa & PG_FRAME), AP_KRW); 292 1.2.2.2 lukem } 293 1.2.2.2 lukem 294 1.2.2.2 lukem 295 1.2.2.2 lukem void 296 1.2.2.2 lukem map_entry_ro(pagetable, va, pa) 297 1.2.2.2 lukem vaddr_t pagetable; 298 1.2.2.2 lukem vaddr_t va; 299 1.2.2.2 lukem paddr_t pa; 300 1.2.2.2 lukem { 301 1.2.2.2 lukem ((pt_entry_t *)pagetable)[((va >> PGSHIFT) & 0x000003ff)] = 302 1.2.2.2 lukem L2_PTE((pa & PG_FRAME), AP_KR); 303 1.2.2.2 lukem } 304 1.2.2.2 lukem 305 1.2.2.2 lukem 306 1.2.2.2 lukem /* 307 1.2.2.2 lukem * void cpu_startup(void) 308 1.2.2.2 lukem * 309 1.2.2.2 lukem * Machine dependant startup code. 310 1.2.2.2 lukem * 311 1.2.2.2 lukem */ 312 1.2.2.2 lukem 313 1.2.2.2 lukem void 314 1.2.2.2 lukem cpu_startup() 315 1.2.2.2 lukem { 316 1.2.2.2 lukem int loop; 317 1.2.2.2 lukem paddr_t minaddr; 318 1.2.2.2 lukem paddr_t maxaddr; 319 1.2.2.2 lukem caddr_t sysbase; 320 1.2.2.2 lukem caddr_t size; 321 1.2.2.2 lukem vsize_t bufsize; 322 1.2.2.2 lukem int base, residual; 323 1.2.2.2 lukem char pbuf[9]; 324 1.2.2.2 lukem 325 1.2.2.2 lukem proc0paddr = (struct user *)kernelstack.pv_va; 326 1.2.2.2 lukem proc0.p_addr = proc0paddr; 327 1.2.2.2 lukem 328 1.2.2.2 lukem /* Set the cpu control register */ 329 1.2.2.2 lukem cpu_setup(boot_args); 330 1.2.2.2 lukem 331 1.2.2.2 lukem /* All domains MUST be clients, permissions are VERY important */ 332 1.2.2.2 lukem cpu_domains(DOMAIN_CLIENT); 333 1.2.2.2 lukem 334 1.2.2.2 lukem /* Lock down zero page */ 335 1.2.2.2 lukem zero_page_readonly(); 336 1.2.2.2 lukem 337 1.2.2.2 lukem /* 338 1.2.2.2 lukem * Give pmap a chance to set up a few more things now the vm 339 1.2.2.2 lukem * is initialised 340 1.2.2.2 lukem */ 341 1.2.2.2 lukem pmap_postinit(); 342 1.2.2.2 lukem 343 1.2.2.2 lukem /* 344 1.2.2.2 lukem * Initialize error message buffer (at end of core). 345 1.2.2.2 lukem */ 346 1.2.2.2 lukem 347 1.2.2.2 lukem /* msgbufphys was setup during the secondary boot strap */ 348 1.2.2.2 lukem for (loop = 0; loop < btoc(MSGBUFSIZE); ++loop) 349 1.2.2.3 thorpej pmap_kenter_pa((vaddr_t)msgbufaddr + loop * NBPG, 350 1.2.2.3 thorpej msgbufphys + loop * NBPG, VM_PROT_READ|VM_PROT_WRITE); 351 1.2.2.2 lukem pmap_update(); 352 1.2.2.2 lukem initmsgbuf(msgbufaddr, round_page(MSGBUFSIZE)); 353 1.2.2.2 lukem 354 1.2.2.2 lukem /* 355 1.2.2.2 lukem * Identify ourselves for the msgbuf (everything printed earlier will 356 1.2.2.2 lukem * not be buffered). 357 1.2.2.2 lukem */ 358 1.2.2.2 lukem printf(version); 359 1.2.2.2 lukem 360 1.2.2.2 lukem format_bytes(pbuf, sizeof(pbuf), arm_page_to_byte(physmem)); 361 1.2.2.2 lukem printf("total memory = %s\n", pbuf); 362 1.2.2.2 lukem 363 1.2.2.2 lukem /* 364 1.2.2.2 lukem * Find out how much space we need, allocate it, 365 1.2.2.2 lukem * and then give everything true virtual addresses. 366 1.2.2.2 lukem */ 367 1.2.2.2 lukem size = allocsys(NULL, NULL); 368 1.2.2.2 lukem sysbase = (caddr_t)uvm_km_zalloc(kernel_map, round_page((vaddr_t)size)); 369 1.2.2.2 lukem if (sysbase == 0) 370 1.2.2.2 lukem panic( 371 1.2.2.2 lukem "cpu_startup: no room for system tables; %d bytes required", 372 1.2.2.2 lukem (u_int)size); 373 1.2.2.2 lukem if ((caddr_t)((allocsys(sysbase, NULL) - sysbase)) != size) 374 1.2.2.2 lukem panic("cpu_startup: system table size inconsistency"); 375 1.2.2.2 lukem 376 1.2.2.2 lukem /* 377 1.2.2.2 lukem * Now allocate buffers proper. They are different than the above 378 1.2.2.2 lukem * in that they usually occupy more virtual memory than physical. 379 1.2.2.2 lukem */ 380 1.2.2.2 lukem bufsize = MAXBSIZE * nbuf; 381 1.2.2.2 lukem if (uvm_map(kernel_map, (vaddr_t *)&buffers, round_page(bufsize), 382 1.2.2.2 lukem NULL, UVM_UNKNOWN_OFFSET, 0, 383 1.2.2.2 lukem UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 384 1.2.2.2 lukem UVM_ADV_NORMAL, 0)) != 0) 385 1.2.2.2 lukem panic("cpu_startup: cannot allocate UVM space for buffers"); 386 1.2.2.2 lukem minaddr = (vaddr_t)buffers; 387 1.2.2.2 lukem if ((bufpages / nbuf) >= btoc(MAXBSIZE)) { 388 1.2.2.2 lukem /* don't want to alloc more physical mem than needed */ 389 1.2.2.2 lukem bufpages = btoc(MAXBSIZE) * nbuf; 390 1.2.2.2 lukem } 391 1.2.2.2 lukem 392 1.2.2.2 lukem base = bufpages / nbuf; 393 1.2.2.2 lukem residual = bufpages % nbuf; 394 1.2.2.2 lukem for (loop = 0; loop < nbuf; ++loop) { 395 1.2.2.2 lukem vsize_t curbufsize; 396 1.2.2.2 lukem vaddr_t curbuf; 397 1.2.2.2 lukem struct vm_page *pg; 398 1.2.2.2 lukem 399 1.2.2.3 thorpej /* 400 1.2.2.3 thorpej * Each buffer has MAXBSIZE bytes of VM space allocated. Of 401 1.2.2.3 thorpej * that MAXBSIZE space, we allocate and map (base+1) pages 402 1.2.2.3 thorpej * for the first "residual" buffers, and then we allocate 403 1.2.2.3 thorpej * "base" pages for the rest. 404 1.2.2.3 thorpej */ 405 1.2.2.2 lukem curbuf = (vaddr_t) buffers + (loop * MAXBSIZE); 406 1.2.2.2 lukem curbufsize = NBPG * ((loop < residual) ? (base+1) : base); 407 1.2.2.2 lukem 408 1.2.2.2 lukem while (curbufsize) { 409 1.2.2.2 lukem pg = uvm_pagealloc(NULL, 0, NULL, 0); 410 1.2.2.2 lukem if (pg == NULL) 411 1.2.2.2 lukem panic("cpu_startup: not enough memory for buffer cache"); 412 1.2.2.3 thorpej pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 413 1.2.2.3 thorpej VM_PROT_READ|VM_PROT_WRITE); 414 1.2.2.2 lukem curbuf += PAGE_SIZE; 415 1.2.2.2 lukem curbufsize -= PAGE_SIZE; 416 1.2.2.2 lukem } 417 1.2.2.2 lukem } 418 1.2.2.2 lukem pmap_update(); 419 1.2.2.2 lukem 420 1.2.2.2 lukem /* 421 1.2.2.2 lukem * Allocate a submap for exec arguments. This map effectively 422 1.2.2.2 lukem * limits the number of processes exec'ing at any time. 423 1.2.2.2 lukem */ 424 1.2.2.2 lukem exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 425 1.2.2.2 lukem 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 426 1.2.2.2 lukem 427 1.2.2.2 lukem /* 428 1.2.2.2 lukem * Allocate a submap for physio 429 1.2.2.2 lukem */ 430 1.2.2.2 lukem phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 431 1.2.2.2 lukem VM_PHYS_SIZE, 0, FALSE, NULL); 432 1.2.2.2 lukem 433 1.2.2.2 lukem /* 434 1.2.2.2 lukem * Finally, allocate mbuf cluster submap. 435 1.2.2.2 lukem */ 436 1.2.2.2 lukem mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 437 1.2.2.2 lukem nmbclusters * mclbytes, VM_MAP_INTRSAFE, 438 1.2.2.2 lukem FALSE, NULL); 439 1.2.2.2 lukem 440 1.2.2.2 lukem format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 441 1.2.2.2 lukem printf("avail memory = %s\n", pbuf); 442 1.2.2.2 lukem format_bytes(pbuf, sizeof(pbuf), bufpages * NBPG); 443 1.2.2.2 lukem printf("using %d buffers containing %s of memory\n", nbuf, pbuf); 444 1.2.2.2 lukem 445 1.2.2.2 lukem /* 446 1.2.2.2 lukem * Set up buffers, so they can be used to read disk labels. 447 1.2.2.2 lukem */ 448 1.2.2.2 lukem bufinit(); 449 1.2.2.2 lukem 450 1.2.2.2 lukem curpcb = &proc0.p_addr->u_pcb; 451 1.2.2.2 lukem curpcb->pcb_flags = 0; 452 1.2.2.2 lukem curpcb->pcb_und_sp = (u_int)proc0.p_addr + USPACE_UNDEF_STACK_TOP; 453 1.2.2.2 lukem curpcb->pcb_sp = (u_int)proc0.p_addr + USPACE_SVC_STACK_TOP; 454 1.2.2.2 lukem (void) pmap_extract(pmap_kernel(), (vaddr_t)(pmap_kernel())->pm_pdir, 455 1.2.2.2 lukem (paddr_t *)&curpcb->pcb_pagedir); 456 1.2.2.2 lukem 457 1.2.2.2 lukem curpcb->pcb_tf = (struct trapframe *)curpcb->pcb_sp - 1; 458 1.2.2.2 lukem } 459 1.2.2.2 lukem 460 1.2.2.2 lukem /* 461 1.2.2.2 lukem * Modify the current mapping for zero page to make it read only 462 1.2.2.2 lukem * 463 1.2.2.2 lukem * This routine is only used until things start forking. Then new 464 1.2.2.2 lukem * system pages are mapped read only in pmap_enter(). 465 1.2.2.2 lukem */ 466 1.2.2.2 lukem 467 1.2.2.2 lukem void 468 1.2.2.2 lukem zero_page_readonly() 469 1.2.2.2 lukem { 470 1.2.2.2 lukem WriteWord(PROCESS_PAGE_TBLS_BASE + 0, 471 1.2.2.2 lukem L2_PTE((systempage.pv_pa & PG_FRAME), AP_KR)); 472 1.2.2.2 lukem cpu_tlb_flushID_SE(0x00000000); 473 1.2.2.2 lukem } 474 1.2.2.2 lukem 475 1.2.2.2 lukem 476 1.2.2.2 lukem /* 477 1.2.2.2 lukem * Modify the current mapping for zero page to make it read/write 478 1.2.2.2 lukem * 479 1.2.2.2 lukem * This routine is only used until things start forking. Then system 480 1.2.2.2 lukem * pages belonging to user processes are never made writable. 481 1.2.2.2 lukem */ 482 1.2.2.2 lukem 483 1.2.2.2 lukem void 484 1.2.2.2 lukem zero_page_readwrite() 485 1.2.2.2 lukem { 486 1.2.2.2 lukem WriteWord(PROCESS_PAGE_TBLS_BASE + 0, 487 1.2.2.2 lukem L2_PTE((systempage.pv_pa & PG_FRAME), AP_KRW)); 488 1.2.2.2 lukem cpu_tlb_flushID_SE(0x00000000); 489 1.2.2.2 lukem } 490 1.2.2.2 lukem 491 1.2.2.2 lukem 492 1.2.2.2 lukem /* 493 1.2.2.2 lukem * machine dependent system variables. 494 1.2.2.2 lukem */ 495 1.2.2.2 lukem 496 1.2.2.2 lukem int 497 1.2.2.2 lukem cpu_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 498 1.2.2.2 lukem int *name; 499 1.2.2.2 lukem u_int namelen; 500 1.2.2.2 lukem void *oldp; 501 1.2.2.2 lukem size_t *oldlenp; 502 1.2.2.2 lukem void *newp; 503 1.2.2.2 lukem size_t newlen; 504 1.2.2.2 lukem struct proc *p; 505 1.2.2.2 lukem { 506 1.2.2.2 lukem /* all sysctl names at this level are terminal */ 507 1.2.2.2 lukem if (namelen != 1) 508 1.2.2.2 lukem return (ENOTDIR); /* overloaded */ 509 1.2.2.2 lukem 510 1.2.2.2 lukem switch (name[0]) { 511 1.2.2.2 lukem case CPU_DEBUG: 512 1.2.2.2 lukem return(sysctl_int(oldp, oldlenp, newp, newlen, &kernel_debug)); 513 1.2.2.2 lukem 514 1.2.2.2 lukem case CPU_BOOTED_DEVICE: 515 1.2.2.2 lukem if (booted_device != NULL) 516 1.2.2.2 lukem return (sysctl_rdstring(oldp, oldlenp, newp, 517 1.2.2.2 lukem booted_device->dv_xname)); 518 1.2.2.2 lukem return (EOPNOTSUPP); 519 1.2.2.2 lukem 520 1.2.2.2 lukem case CPU_CONSDEV: { 521 1.2.2.2 lukem dev_t consdev; 522 1.2.2.2 lukem if (cn_tab != NULL) 523 1.2.2.2 lukem consdev = cn_tab->cn_dev; 524 1.2.2.2 lukem else 525 1.2.2.2 lukem consdev = NODEV; 526 1.2.2.2 lukem return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 527 1.2.2.2 lukem sizeof consdev)); 528 1.2.2.2 lukem } 529 1.2.2.2 lukem case CPU_BOOTED_KERNEL: { 530 1.2.2.2 lukem if (booted_kernel != NULL && booted_kernel[0] != '\0') 531 1.2.2.2 lukem return sysctl_rdstring(oldp, oldlenp, newp, 532 1.2.2.2 lukem booted_kernel); 533 1.2.2.2 lukem return (EOPNOTSUPP); 534 1.2.2.2 lukem } 535 1.2.2.2 lukem 536 1.2.2.2 lukem default: 537 1.2.2.2 lukem return (EOPNOTSUPP); 538 1.2.2.2 lukem } 539 1.2.2.2 lukem /* NOTREACHED */ 540 1.2.2.2 lukem } 541 1.2.2.2 lukem 542 1.2.2.2 lukem void 543 1.2.2.2 lukem parse_mi_bootargs(args) 544 1.2.2.2 lukem char *args; 545 1.2.2.2 lukem { 546 1.2.2.2 lukem int integer; 547 1.2.2.2 lukem 548 1.2.2.2 lukem if (get_bootconf_option(args, "single", BOOTOPT_TYPE_BOOLEAN, &integer) 549 1.2.2.2 lukem || get_bootconf_option(args, "-s", BOOTOPT_TYPE_BOOLEAN, &integer)) 550 1.2.2.2 lukem if (integer) 551 1.2.2.2 lukem boothowto |= RB_SINGLE; 552 1.2.2.2 lukem if (get_bootconf_option(args, "kdb", BOOTOPT_TYPE_BOOLEAN, &integer) 553 1.2.2.2 lukem || get_bootconf_option(args, "-k", BOOTOPT_TYPE_BOOLEAN, &integer)) 554 1.2.2.2 lukem if (integer) 555 1.2.2.2 lukem boothowto |= RB_KDB; 556 1.2.2.2 lukem if (get_bootconf_option(args, "ask", BOOTOPT_TYPE_BOOLEAN, &integer) 557 1.2.2.2 lukem || get_bootconf_option(args, "-a", BOOTOPT_TYPE_BOOLEAN, &integer)) 558 1.2.2.2 lukem if (integer) 559 1.2.2.2 lukem boothowto |= RB_ASKNAME; 560 1.2.2.2 lukem 561 1.2.2.2 lukem #ifdef PMAP_DEBUG 562 1.2.2.2 lukem if (get_bootconf_option(args, "pmapdebug", BOOTOPT_TYPE_INT, &integer)) { 563 1.2.2.2 lukem pmap_debug_level = integer; 564 1.2.2.2 lukem pmap_debug(pmap_debug_level); 565 1.2.2.2 lukem } 566 1.2.2.2 lukem #endif /* PMAP_DEBUG */ 567 1.2.2.2 lukem 568 1.2.2.2 lukem /* if (get_bootconf_option(args, "nbuf", BOOTOPT_TYPE_INT, &integer)) 569 1.2.2.2 lukem bufpages = integer;*/ 570 1.2.2.2 lukem 571 1.2.2.2 lukem #ifndef PMAP_STATIC_L1S 572 1.2.2.2 lukem if (get_bootconf_option(args, "maxproc", BOOTOPT_TYPE_INT, &integer)) { 573 1.2.2.2 lukem max_processes = integer; 574 1.2.2.2 lukem if (max_processes < 16) 575 1.2.2.2 lukem max_processes = 16; 576 1.2.2.2 lukem /* Limit is PDSIZE * (max_processes + 1) <= 4MB */ 577 1.2.2.2 lukem if (max_processes > 255) 578 1.2.2.2 lukem max_processes = 255; 579 1.2.2.2 lukem } 580 1.2.2.2 lukem #endif /* !PMAP_STATUC_L1S */ 581 1.2.2.2 lukem #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MINIROOTSIZE) 582 1.2.2.2 lukem if (get_bootconf_option(args, "memorydisc", BOOTOPT_TYPE_INT, &integer) 583 1.2.2.2 lukem || get_bootconf_option(args, "memorydisk", BOOTOPT_TYPE_INT, &integer)) { 584 1.2.2.2 lukem memory_disc_size = integer; 585 1.2.2.2 lukem memory_disc_size *= 1024; 586 1.2.2.2 lukem if (memory_disc_size < 32*1024) 587 1.2.2.2 lukem memory_disc_size = 32*1024; 588 1.2.2.2 lukem if (memory_disc_size > 2048*1024) 589 1.2.2.2 lukem memory_disc_size = 2048*1024; 590 1.2.2.2 lukem } 591 1.2.2.2 lukem #endif /* NMD && MEMORY_DISK_HOOKS && !MINIROOTSIZE */ 592 1.2.2.2 lukem 593 1.2.2.2 lukem if (get_bootconf_option(args, "quiet", BOOTOPT_TYPE_BOOLEAN, &integer) 594 1.2.2.2 lukem || get_bootconf_option(args, "-q", BOOTOPT_TYPE_BOOLEAN, &integer)) 595 1.2.2.2 lukem if (integer) 596 1.2.2.2 lukem boothowto |= AB_QUIET; 597 1.2.2.2 lukem if (get_bootconf_option(args, "verbose", BOOTOPT_TYPE_BOOLEAN, &integer) 598 1.2.2.2 lukem || get_bootconf_option(args, "-v", BOOTOPT_TYPE_BOOLEAN, &integer)) 599 1.2.2.2 lukem if (integer) 600 1.2.2.2 lukem boothowto |= AB_VERBOSE; 601 1.2.2.2 lukem } 602 1.2.2.2 lukem 603 1.2.2.2 lukem /* End of machdep.c */ 604
Indexes created Mon Oct 20 10:10:01 GMT 2025