ixdp425_machdep.c revision 1.5
1 /* $NetBSD: ixdp425_machdep.c,v 1.5 2003/07/02 11:02:29 ichiro Exp $ */ 2 /* 3 * Copyright (c) 2003 4 * Ichiro FUKUHARA <ichiro (at) ichiro.org>. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Ichiro FUKUHARA. 18 * 4. The name of the company nor the name of the author may be used to 19 * endorse or promote products derived from this software without specific 20 * prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR 26 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 /* 35 * Copyright (c) 1997,1998 Mark Brinicombe. 36 * Copyright (c) 1997,1998 Causality Limited. 37 * All rights reserved. 38 * 39 * Redistribution and use in source and binary forms, with or without 40 * modification, are permitted provided that the following conditions 41 * are met: 42 * 1. Redistributions of source code must retain the above copyright 43 * notice, this list of conditions and the following disclaimer. 44 * 2. Redistributions in binary form must reproduce the above copyright 45 * notice, this list of conditions and the following disclaimer in the 46 * documentation and/or other materials provided with the distribution. 47 * 3. All advertising materials mentioning features or use of this software 48 * must display the following acknowledgement: 49 * This product includes software developed by Mark Brinicombe 50 * for the NetBSD Project. 51 * 4. The name of the company nor the name of the author may be used to 52 * endorse or promote products derived from this software without specific 53 * prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 56 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 57 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 58 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 59 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 60 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 61 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 65 * SUCH DAMAGE. 66 */ 67 68 /* Machine dependant functions for kernel setup for Intel IXP425 evaluation 69 * boards using RedBoot firmware. 70 */ 71 72 #include "opt_ddb.h" 73 #include "opt_kgdb.h" 74 #include "opt_pmap_debug.h" 75 76 #include <sys/param.h> 77 #include <sys/device.h> 78 #include <sys/systm.h> 79 #include <sys/kernel.h> 80 #include <sys/exec.h> 81 #include <sys/proc.h> 82 #include <sys/msgbuf.h> 83 #include <sys/reboot.h> 84 #include <sys/termios.h> 85 #include <sys/ksyms.h> 86 87 #include <uvm/uvm_extern.h> 88 89 #include <dev/cons.h> 90 91 #include <machine/db_machdep.h> 92 #include <ddb/db_sym.h> 93 #include <ddb/db_extern.h> 94 95 #include <machine/bootconfig.h> 96 #include <machine/bus.h> 97 #include <machine/cpu.h> 98 #include <machine/frame.h> 99 #include <arm/undefined.h> 100 101 #include <arm/arm32/machdep.h> 102 103 #include <arm/xscale/ixp425reg.h> 104 #include <arm/xscale/ixp425var.h> 105 106 #include <arm/xscale/ixp425_sipvar.h> 107 #include <arm/xscale/ixp425_comvar.h> 108 109 #include "opt_ipkdb.h" 110 #include "ksyms.h" 111 112 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 113 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 114 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 115 116 /* 117 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 118 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 119 */ 120 #define KERNEL_VM_SIZE 0x0C000000 121 122 123 /* 124 * Address to call from cpu_reset() to reset the machine. 125 * This is machine architecture dependant as it varies depending 126 * on where the ROM appears when you turn the MMU off. 127 */ 128 129 u_int cpu_reset_address = 0x00000000; 130 131 /* Define various stack sizes in pages */ 132 #define IRQ_STACK_SIZE 1 133 #define ABT_STACK_SIZE 1 134 #ifdef IPKDB 135 #define UND_STACK_SIZE 2 136 #else 137 #define UND_STACK_SIZE 1 138 #endif 139 140 BootConfig bootconfig; /* Boot config storage */ 141 char *boot_args = NULL; 142 char *boot_file = NULL; 143 144 vm_offset_t physical_start; 145 vm_offset_t physical_freestart; 146 vm_offset_t physical_freeend; 147 vm_offset_t physical_end; 148 u_int free_pages; 149 vm_offset_t pagetables_start; 150 int physmem = 0; 151 152 /*int debug_flags;*/ 153 #ifndef PMAP_STATIC_L1S 154 int max_processes = 64; /* Default number */ 155 #endif /* !PMAP_STATIC_L1S */ 156 157 /* Physical and virtual addresses for some global pages */ 158 pv_addr_t systempage; 159 pv_addr_t irqstack; 160 pv_addr_t undstack; 161 pv_addr_t abtstack; 162 pv_addr_t kernelstack; 163 pv_addr_t minidataclean; 164 165 vm_offset_t msgbufphys; 166 167 extern u_int data_abort_handler_address; 168 extern u_int prefetch_abort_handler_address; 169 extern u_int undefined_handler_address; 170 extern int end; 171 172 #ifdef PMAP_DEBUG 173 extern int pmap_debug_level; 174 #endif 175 176 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 177 178 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 179 #define KERNEL_PT_KERNEL_NUM 4 180 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 181 /* L2 tables for mapping kernel VM */ 182 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1) 183 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 184 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 185 186 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 187 188 struct user *proc0paddr; 189 190 /* Prototypes */ 191 192 void consinit(void); 193 u_int cpu_get_control __P((void)); 194 195 /* 196 * Define the default console speed for the board. This is generally 197 * what the firmware provided with the board defaults to. 198 */ 199 #ifndef CONSPEED 200 #define CONSPEED B115200 201 #endif /* ! CONSPEED */ 202 203 #ifndef CONUNIT 204 #define CONUNIT 0 205 #endif 206 207 #ifndef CONMODE 208 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */ 209 #endif 210 211 int comcnspeed = CONSPEED; 212 int comcnmode = CONMODE; 213 int comcnunit = CONUNIT; 214 215 #if KGDB 216 #ifndef KGDB_DEVNAME 217 #error Must define KGDB_DEVNAME 218 #endif 219 const char kgdb_devname[] = KGDB_DEVNAME; 220 221 #ifndef KGDB_DEVADDR 222 #error Must define KGDB_DEVADDR 223 #endif 224 unsigned long kgdb_devaddr = KGDB_DEVADDR; 225 226 #ifndef KGDB_DEVRATE 227 #define KGDB_DEVRATE CONSPEED 228 #endif 229 int kgdb_devrate = KGDB_DEVRATE; 230 231 #ifndef KGDB_DEVMODE 232 #define KGDB_DEVMODE CONMODE 233 #endif 234 int kgdb_devmode = KGDB_DEVMODE; 235 #endif /* KGDB */ 236 237 /* 238 * void cpu_reboot(int howto, char *bootstr) 239 * 240 * Reboots the system 241 * 242 * Deal with any syncing, unmounting, dumping and shutdown hooks, 243 * then reset the CPU. 244 */ 245 void 246 cpu_reboot(int howto, char *bootstr) 247 { 248 #ifdef DIAGNOSTIC 249 /* info */ 250 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 251 #endif 252 253 /* 254 * If we are still cold then hit the air brakes 255 * and crash to earth fast 256 */ 257 if (cold) { 258 doshutdownhooks(); 259 printf("The operating system has halted.\n"); 260 printf("Please press any key to reboot.\n\n"); 261 cngetc(); 262 printf("rebooting...\n"); 263 goto reset; 264 } 265 266 /* Disable console buffering */ 267 268 /* 269 * If RB_NOSYNC was not specified sync the discs. 270 * Note: Unless cold is set to 1 here, syslogd will die during the 271 * unmount. It looks like syslogd is getting woken up only to find 272 * that it cannot page part of the binary in as the filesystem has 273 * been unmounted. 274 */ 275 if (!(howto & RB_NOSYNC)) 276 bootsync(); 277 278 /* Say NO to interrupts */ 279 splhigh(); 280 281 /* Do a dump if requested. */ 282 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 283 dumpsys(); 284 285 /* Run any shutdown hooks */ 286 doshutdownhooks(); 287 288 /* Make sure IRQ's are disabled */ 289 IRQdisable; 290 291 if (howto & RB_HALT) { 292 printf("The operating system has halted.\n"); 293 printf("Please press any key to reboot.\n\n"); 294 cngetc(); 295 } 296 297 printf("rebooting...\n\r"); 298 reset: 299 /* 300 * Make really really sure that all interrupts are disabled, 301 */ 302 (void) disable_interrupts(I32_bit|F32_bit); 303 /* 304 * XXX system reset routine 305 */ 306 (void) disable_interrupts(I32_bit|F32_bit); 307 /* ...and if that didn't work, just croak. */ 308 printf("RESET FAILED!\n"); 309 for (;;); 310 } 311 312 /* Static device mappings. */ 313 static const struct pmap_devmap ixp425_devmap[] = { 314 { 315 IXP425_IO_VBASE, 316 IXP425_IO_HWBASE, 317 IXP425_IO_SIZE, 318 VM_PROT_READ|VM_PROT_WRITE, 319 PTE_NOCACHE, 320 }, 321 322 { 323 IXP425_EXP_VBASE, 324 IXP425_EXP_HWBASE, 325 IXP425_EXP_SIZE, 326 VM_PROT_READ|VM_PROT_WRITE, 327 PTE_NOCACHE, 328 }, 329 330 { 331 IXP425_PCI_VBASE, 332 IXP425_PCI_HWBASE, 333 IXP425_PCI_SIZE, 334 VM_PROT_READ|VM_PROT_WRITE, 335 PTE_NOCACHE, 336 }, 337 338 { 339 0, 340 0, 341 0, 342 0, 343 0, 344 } 345 }; 346 347 /* 348 * u_int initarm(...) 349 * 350 * Initial entry point on startup. This gets called before main() is 351 * entered. 352 * It should be responsible for setting up everything that must be 353 * in place when main is called. 354 * This includes 355 * Taking a copy of the boot configuration structure. 356 * Initialising the physical console so characters can be printed. 357 * Setting up page tables for the kernel 358 * Relocating the kernel to the bottom of physical memory 359 */ 360 u_int 361 initarm(void *arg) 362 { 363 extern vaddr_t xscale_cache_clean_addr; 364 #ifdef DIAGNOSTIC 365 extern vsize_t xscale_minidata_clean_size; 366 #endif 367 int loop; 368 int loop1; 369 u_int kerneldatasize, symbolsize; 370 u_int l1pagetable; 371 u_int freemempos; 372 pv_addr_t kernel_l1pt; 373 #if 0 374 paddr_t memstart; 375 psize_t memsize; 376 #endif 377 378 /* 379 * Since we map v0xf0000000 == p0xc8000000, it's possible for 380 * us to initialize the console now. 381 */ 382 consinit(); 383 384 #ifdef VERBOSE_INIT_ARM 385 /* Talk to the user */ 386 printf("\nNetBSD/evbarm (IXP425) booting ...\n"); 387 #endif 388 389 /* 390 * Heads up ... Setup the CPU / MMU / TLB functions 391 */ 392 if (set_cpufuncs()) 393 panic("cpu not recognized!"); 394 395 /* XXX overwrite bootconfig to hardcoded values */ 396 bootconfig.dramblocks = 1; 397 bootconfig.dram[0].address = 0x10000000; 398 bootconfig.dram[0].pages = 0x04000000 / PAGE_SIZE; /* SDRAM 64MB */ 399 400 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 401 402 #ifdef VERBOSE_INIT_ARM 403 printf("kernsize=0x%x\n", kerneldatasize); 404 #endif 405 kerneldatasize += symbolsize; 406 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 407 408 /* 409 * Set up the variables that define the availablilty of 410 * physical memory. For now, we're going to set 411 * physical_freestart to 0x10200000 (where the kernel 412 * was loaded), and allocate the memory we need downwards. 413 * If we get too close to the L1 table that we set up, we 414 * will panic. We will update physical_freestart and 415 * physical_freeend later to reflect what pmap_bootstrap() 416 * wants to see. 417 * 418 * XXX pmap_bootstrap() needs an enema. 419 */ 420 physical_start = bootconfig.dram[0].address; 421 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 422 423 physical_freestart = physical_start 424 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 425 physical_freeend = physical_end; 426 427 physmem = (physical_end - physical_start) / PAGE_SIZE; 428 429 /* Tell the user about the memory */ 430 #ifdef VERBOSE_INIT_ARM 431 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 432 physical_start, physical_end - 1); 433 434 printf("Allocating page tables\n"); 435 #endif 436 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 437 438 freemempos = 0x10000000; 439 440 #ifdef VERBOSE_INIT_ARM 441 printf("CP15 Register1 = 0x%08x\n", cpu_get_control()); 442 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 443 physical_start, physical_end); 444 #endif 445 446 /* Define a macro to simplify memory allocation */ 447 #define valloc_pages(var, np) \ 448 alloc_pages((var).pv_pa, (np)); \ 449 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 450 451 #if 0 452 #define alloc_pages(var, np) \ 453 physical_freeend -= ((np) * PAGE_SIZE); \ 454 if (physical_freeend < physical_freestart) \ 455 panic("initarm: out of memory"); \ 456 (var) = physical_freeend; \ 457 free_pages -= (np); \ 458 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 459 #else 460 #define alloc_pages(var, np) \ 461 (var) = freemempos; \ 462 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 463 freemempos += (np) * PAGE_SIZE; 464 #endif 465 466 loop1 = 0; 467 kernel_l1pt.pv_pa = 0; 468 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 469 /* Are we 16KB aligned for an L1 ? */ 470 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 471 && kernel_l1pt.pv_pa == 0) { 472 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 473 } else { 474 valloc_pages(kernel_pt_table[loop1], 475 L2_TABLE_SIZE / PAGE_SIZE); 476 ++loop1; 477 } 478 } 479 480 /* This should never be able to happen but better confirm that. */ 481 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 482 panic("initarm: Failed to align the kernel page directory"); 483 484 /* 485 * Allocate a page for the system page mapped to V0x00000000 486 * This page will just contain the system vectors and can be 487 * shared by all processes. 488 */ 489 alloc_pages(systempage.pv_pa, 1); 490 491 /* Allocate stacks for all modes */ 492 valloc_pages(irqstack, IRQ_STACK_SIZE); 493 valloc_pages(abtstack, ABT_STACK_SIZE); 494 valloc_pages(undstack, UND_STACK_SIZE); 495 valloc_pages(kernelstack, UPAGES); 496 497 /* Allocate enough pages for cleaning the Mini-Data cache. */ 498 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 499 valloc_pages(minidataclean, 1); 500 501 #ifdef VERBOSE_INIT_ARM 502 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 503 irqstack.pv_va); 504 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 505 abtstack.pv_va); 506 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 507 undstack.pv_va); 508 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 509 kernelstack.pv_va); 510 #endif 511 512 /* 513 * XXX Defer this to later so that we can reclaim the memory 514 * XXX used by the RedBoot page tables. 515 */ 516 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 517 518 /* 519 * Ok we have allocated physical pages for the primary kernel 520 * page tables 521 */ 522 523 #ifdef VERBOSE_INIT_ARM 524 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 525 #endif 526 527 /* 528 * Now we start construction of the L1 page table 529 * We start by mapping the L2 page tables into the L1. 530 * This means that we can replace L1 mappings later on if necessary 531 */ 532 l1pagetable = kernel_l1pt.pv_pa; 533 534 /* Map the L2 pages tables in the L1 page table */ 535 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 536 &kernel_pt_table[KERNEL_PT_SYS]); 537 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 538 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 539 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 540 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 541 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 542 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 543 544 /* update the top of the kernel VM */ 545 pmap_curmaxkvaddr = 546 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 547 548 pmap_link_l2pt(l1pagetable, IXP425_IO_VBASE, 549 &kernel_pt_table[KERNEL_PT_IO]); 550 551 #ifdef VERBOSE_INIT_ARM 552 printf("Mapping kernel\n"); 553 #endif 554 555 /* Now we fill in the L2 pagetable for the kernel static code/data */ 556 { 557 extern char etext[], _end[]; 558 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 559 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 560 u_int logical; 561 562 textsize = (textsize + PGOFSET) & ~PGOFSET; 563 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 564 565 logical = 0x00200000; /* offset of kernel in RAM */ 566 567 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 568 physical_start + logical, textsize, 569 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 570 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 571 physical_start + logical, totalsize - textsize, 572 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 573 } 574 575 #ifdef VERBOSE_INIT_ARM 576 printf("Constructing L2 page tables\n"); 577 #endif 578 579 /* Map the stack pages */ 580 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 581 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 582 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 583 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 584 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 585 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 586 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 587 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 588 589 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 590 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 591 592 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 593 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 594 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 595 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 596 } 597 598 /* Map the Mini-Data cache clean area. */ 599 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 600 minidataclean.pv_pa); 601 602 /* Map the vector page. */ 603 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 604 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 605 606 /* 607 * Map the IXP425 registers 608 */ 609 pmap_devmap_bootstrap(l1pagetable, ixp425_devmap); 610 611 /* 612 * Give the XScale global cache clean code an appropriately 613 * sized chunk of unmapped VA space starting at 0xff000000 614 * (our device mappings end before this address). 615 */ 616 xscale_cache_clean_addr = 0xff000000U; 617 618 /* 619 * Now we have the real page tables in place so we can switch to them. 620 * Once this is done we will be running with the REAL kernel page 621 * tables. 622 */ 623 624 /* 625 * Update the physical_freestart/physical_freeend/free_pages 626 * variables. 627 */ 628 { 629 extern char _end[]; 630 631 physical_freestart = physical_start + 632 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 633 KERNEL_BASE); 634 physical_freeend = physical_end; 635 free_pages = 636 (physical_freeend - physical_freestart) / PAGE_SIZE; 637 } 638 639 /* Switch tables */ 640 #ifdef VERBOSE_INIT_ARM 641 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 642 physical_freestart, free_pages, free_pages); 643 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 644 #endif 645 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 646 setttb(kernel_l1pt.pv_pa); 647 cpu_tlb_flushID(); 648 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 649 650 /* 651 * Moved from cpu_startup() as data_abort_handler() references 652 * this during uvm init 653 */ 654 proc0paddr = (struct user *)kernelstack.pv_va; 655 lwp0.l_addr = proc0paddr; 656 657 #ifdef VERBOSE_INIT_ARM 658 printf("bootstrap done.\n"); 659 #endif 660 661 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 662 663 /* 664 * Pages were allocated during the secondary bootstrap for the 665 * stacks for different CPU modes. 666 * We must now set the r13 registers in the different CPU modes to 667 * point to these stacks. 668 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 669 * of the stack memory. 670 */ 671 #ifdef VERBOSE_INIT_ARM 672 printf("init subsystems: stacks "); 673 #endif 674 675 set_stackptr(PSR_IRQ32_MODE, 676 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 677 set_stackptr(PSR_ABT32_MODE, 678 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 679 set_stackptr(PSR_UND32_MODE, 680 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 681 682 /* 683 * Well we should set a data abort handler. 684 * Once things get going this will change as we will need a proper 685 * handler. 686 * Until then we will use a handler that just panics but tells us 687 * why. 688 * Initialisation of the vectors will just panic on a data abort. 689 * This just fills in a slighly better one. 690 */ 691 #ifdef VERBOSE_INIT_ARM 692 printf("vectors "); 693 #endif 694 data_abort_handler_address = (u_int)data_abort_handler; 695 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 696 undefined_handler_address = (u_int)undefinedinstruction_bounce; 697 698 /* Initialise the undefined instruction handlers */ 699 #ifdef VERBOSE_INIT_ARM 700 printf("undefined "); 701 #endif 702 undefined_init(); 703 704 /* Load memory into UVM. */ 705 #ifdef VERBOSE_INIT_ARM 706 printf("page "); 707 #endif 708 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 709 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 710 atop(physical_freestart), atop(physical_freeend), 711 VM_FREELIST_DEFAULT); 712 713 /* Boot strap pmap telling it where the kernel page table is */ 714 #ifdef VERBOSE_INIT_ARM 715 printf("pmap "); 716 #endif 717 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 718 KERNEL_VM_BASE + KERNEL_VM_SIZE); 719 720 /* Setup the IRQ system */ 721 #ifdef VERBOSE_INIT_ARM 722 printf("irq "); 723 #endif 724 ixp425_intr_init(); 725 #ifdef VERBOSE_INIT_ARM 726 printf("\nAll initialize done!\nNow Starting NetBSD, Hear we go!\n"); 727 #endif 728 729 #ifdef BOOTHOWTO 730 boothowto = BOOTHOWTO; 731 #endif 732 733 #ifdef IPKDB 734 /* Initialise ipkdb */ 735 ipkdb_init(); 736 if (boothowto & RB_KDB) 737 ipkdb_connect(0); 738 #endif 739 740 #if NKSYMS || defined(DDB) || defined(LKM) 741 /* Firmware doesn't load symbols. */ 742 ksyms_init(0, NULL, NULL); 743 #endif 744 745 #ifdef DDB 746 db_machine_init(); 747 if (boothowto & RB_KDB) 748 Debugger(); 749 #endif 750 751 /* We return the new stack pointer address */ 752 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 753 } 754 755 /* 756 * consinit 757 */ 758 void 759 consinit(void) 760 { 761 extern struct bus_space ixpsip_bs_tag; 762 static int consinit_called; 763 764 if (consinit_called != 0) 765 return; 766 767 consinit_called = 1; 768 if (ixdp_ixp4xx_comcnattach(&ixpsip_bs_tag, comcnunit, 769 comcnspeed, FREQ, comcnmode)) 770 panic("can't init serial console (UART%d)", comcnunit); 771 } 772
Indexes created Sat Oct 11 19:10:01 GMT 2025