ixdp425_machdep.c revision 1.8
1 /* $NetBSD: ixdp425_machdep.c,v 1.8 2003/10/08 14:55:04 scw 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 <sys/cdefs.h> 73 __KERNEL_RCSID(0, "$NetBSD: ixdp425_machdep.c,v 1.8 2003/10/08 14:55:04 scw Exp $"); 74 75 #include "opt_ddb.h" 76 #include "opt_kgdb.h" 77 #include "opt_pmap_debug.h" 78 79 #include <sys/param.h> 80 #include <sys/device.h> 81 #include <sys/systm.h> 82 #include <sys/kernel.h> 83 #include <sys/exec.h> 84 #include <sys/proc.h> 85 #include <sys/msgbuf.h> 86 #include <sys/reboot.h> 87 #include <sys/termios.h> 88 #include <sys/ksyms.h> 89 90 #include <uvm/uvm_extern.h> 91 92 #include <dev/cons.h> 93 94 #include <machine/db_machdep.h> 95 #include <ddb/db_sym.h> 96 #include <ddb/db_extern.h> 97 98 #include <machine/bootconfig.h> 99 #include <machine/bus.h> 100 #include <machine/cpu.h> 101 #include <machine/frame.h> 102 #include <arm/undefined.h> 103 104 #include <arm/arm32/machdep.h> 105 106 #include <arm/xscale/ixp425reg.h> 107 #include <arm/xscale/ixp425var.h> 108 #include <arm/xscale/ixp425_sipvar.h> 109 110 #include "com.h" 111 #if NCOM > 0 112 #include <dev/ic/comreg.h> 113 #include <dev/ic/comvar.h> 114 #endif 115 116 #include "opt_ipkdb.h" 117 #include "ksyms.h" 118 119 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 120 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 121 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 122 123 /* 124 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 125 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 126 */ 127 #define KERNEL_VM_SIZE 0x0C000000 128 129 130 /* 131 * Address to call from cpu_reset() to reset the machine. 132 * This is machine architecture dependant as it varies depending 133 * on where the ROM appears when you turn the MMU off. 134 */ 135 136 u_int cpu_reset_address = 0x00000000; 137 138 /* Define various stack sizes in pages */ 139 #define IRQ_STACK_SIZE 1 140 #define ABT_STACK_SIZE 1 141 #ifdef IPKDB 142 #define UND_STACK_SIZE 2 143 #else 144 #define UND_STACK_SIZE 1 145 #endif 146 147 BootConfig bootconfig; /* Boot config storage */ 148 char *boot_args = NULL; 149 char *boot_file = NULL; 150 151 vm_offset_t physical_start; 152 vm_offset_t physical_freestart; 153 vm_offset_t physical_freeend; 154 vm_offset_t physical_end; 155 u_int free_pages; 156 vm_offset_t pagetables_start; 157 int physmem = 0; 158 159 /* Physical and virtual addresses for some global pages */ 160 pv_addr_t systempage; 161 pv_addr_t irqstack; 162 pv_addr_t undstack; 163 pv_addr_t abtstack; 164 pv_addr_t kernelstack; 165 pv_addr_t minidataclean; 166 167 vm_offset_t msgbufphys; 168 169 extern u_int data_abort_handler_address; 170 extern u_int prefetch_abort_handler_address; 171 extern u_int undefined_handler_address; 172 extern int end; 173 174 #ifdef PMAP_DEBUG 175 extern int pmap_debug_level; 176 #endif 177 178 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 179 180 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 181 #define KERNEL_PT_KERNEL_NUM 4 182 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 183 /* L2 tables for mapping kernel VM */ 184 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1) 185 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 186 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 187 188 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 189 190 struct user *proc0paddr; 191 192 /* Prototypes */ 193 194 void consinit(void); 195 u_int cpu_get_control __P((void)); 196 197 /* 198 * Define the default console speed for the board. This is generally 199 * what the firmware provided with the board defaults to. 200 */ 201 #ifndef CONSPEED 202 #define CONSPEED B115200 203 #endif /* ! CONSPEED */ 204 205 #ifndef CONUNIT 206 #define CONUNIT 0 207 #endif 208 209 #ifndef CONMODE 210 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */ 211 #endif 212 213 int comcnspeed = CONSPEED; 214 int comcnmode = CONMODE; 215 int comcnunit = CONUNIT; 216 217 #if KGDB 218 #ifndef KGDB_DEVNAME 219 #error Must define KGDB_DEVNAME 220 #endif 221 const char kgdb_devname[] = KGDB_DEVNAME; 222 223 #ifndef KGDB_DEVADDR 224 #error Must define KGDB_DEVADDR 225 #endif 226 unsigned long kgdb_devaddr = KGDB_DEVADDR; 227 228 #ifndef KGDB_DEVRATE 229 #define KGDB_DEVRATE CONSPEED 230 #endif 231 int kgdb_devrate = KGDB_DEVRATE; 232 233 #ifndef KGDB_DEVMODE 234 #define KGDB_DEVMODE CONMODE 235 #endif 236 int kgdb_devmode = KGDB_DEVMODE; 237 #endif /* KGDB */ 238 239 /* 240 * void cpu_reboot(int howto, char *bootstr) 241 * 242 * Reboots the system 243 * 244 * Deal with any syncing, unmounting, dumping and shutdown hooks, 245 * then reset the CPU. 246 */ 247 void 248 cpu_reboot(int howto, char *bootstr) 249 { 250 #ifdef DIAGNOSTIC 251 /* info */ 252 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 253 #endif 254 255 /* 256 * If we are still cold then hit the air brakes 257 * and crash to earth fast 258 */ 259 if (cold) { 260 doshutdownhooks(); 261 printf("The operating system has halted.\n"); 262 printf("Please press any key to reboot.\n\n"); 263 cngetc(); 264 printf("rebooting...\n"); 265 goto reset; 266 } 267 268 /* Disable console buffering */ 269 270 /* 271 * If RB_NOSYNC was not specified sync the discs. 272 * Note: Unless cold is set to 1 here, syslogd will die during the 273 * unmount. It looks like syslogd is getting woken up only to find 274 * that it cannot page part of the binary in as the filesystem has 275 * been unmounted. 276 */ 277 if (!(howto & RB_NOSYNC)) 278 bootsync(); 279 280 /* Say NO to interrupts */ 281 splhigh(); 282 283 /* Do a dump if requested. */ 284 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 285 dumpsys(); 286 287 /* Run any shutdown hooks */ 288 doshutdownhooks(); 289 290 /* Make sure IRQ's are disabled */ 291 IRQdisable; 292 293 if (howto & RB_HALT) { 294 printf("The operating system has halted.\n"); 295 printf("Please press any key to reboot.\n\n"); 296 cngetc(); 297 } 298 299 printf("rebooting...\n\r"); 300 reset: 301 /* 302 * Make really really sure that all interrupts are disabled, 303 */ 304 (void) disable_interrupts(I32_bit|F32_bit); 305 /* 306 * XXX system reset routine 307 */ 308 (void) disable_interrupts(I32_bit|F32_bit); 309 /* ...and if that didn't work, just croak. */ 310 printf("RESET FAILED!\n"); 311 for (;;); 312 } 313 314 /* Static device mappings. */ 315 static const struct pmap_devmap ixp425_devmap[] = { 316 /* Physical/Virtual address for I/O space */ 317 { 318 IXP425_IO_VBASE, 319 IXP425_IO_HWBASE, 320 IXP425_IO_SIZE, 321 VM_PROT_READ|VM_PROT_WRITE, 322 PTE_NOCACHE, 323 }, 324 325 /* Expansion Bus */ 326 { 327 IXP425_EXP_VBASE, 328 IXP425_EXP_HWBASE, 329 IXP425_EXP_SIZE, 330 VM_PROT_READ|VM_PROT_WRITE, 331 PTE_NOCACHE, 332 }, 333 334 /* IXP425 PCI Configuration */ 335 { 336 IXP425_PCI_VBASE, 337 IXP425_PCI_HWBASE, 338 IXP425_PCI_SIZE, 339 VM_PROT_READ|VM_PROT_WRITE, 340 PTE_NOCACHE, 341 }, 342 343 /* PCI Memory Space */ 344 { 345 IXP425_PCI_MEM_VBASE, 346 IXP425_PCI_MEM_HWBASE, 347 IXP425_PCI_MEM_SIZE, 348 VM_PROT_READ|VM_PROT_WRITE, 349 PTE_NOCACHE, 350 }, 351 352 { 353 0, 354 0, 355 0, 356 0, 357 0, 358 } 359 }; 360 361 /* 362 * u_int initarm(...) 363 * 364 * Initial entry point on startup. This gets called before main() is 365 * entered. 366 * It should be responsible for setting up everything that must be 367 * in place when main is called. 368 * This includes 369 * Taking a copy of the boot configuration structure. 370 * Initialising the physical console so characters can be printed. 371 * Setting up page tables for the kernel 372 * Relocating the kernel to the bottom of physical memory 373 */ 374 u_int 375 initarm(void *arg) 376 { 377 extern vaddr_t xscale_cache_clean_addr; 378 #ifdef DIAGNOSTIC 379 extern vsize_t xscale_minidata_clean_size; 380 #endif 381 int loop; 382 int loop1; 383 u_int kerneldatasize, symbolsize; 384 u_int l1pagetable; 385 u_int freemempos; 386 pv_addr_t kernel_l1pt; 387 #if 0 388 paddr_t memstart; 389 psize_t memsize; 390 #endif 391 392 /* 393 * Since we map v0xf0000000 == p0xc8000000, it's possible for 394 * us to initialize the console now. 395 */ 396 consinit(); 397 398 #ifdef VERBOSE_INIT_ARM 399 /* Talk to the user */ 400 printf("\nNetBSD/evbarm (Intel IXDP425) booting ...\n"); 401 #endif 402 403 /* 404 * Heads up ... Setup the CPU / MMU / TLB functions 405 */ 406 if (set_cpufuncs()) 407 panic("cpu not recognized!"); 408 409 /* XXX overwrite bootconfig to hardcoded values */ 410 bootconfig.dramblocks = 1; 411 bootconfig.dram[0].address = 0x10000000; 412 /* XXX */ 413 #if BOARDTYPE == zao425 414 bootconfig.dram[0].pages = 0x04000000 / PAGE_SIZE; /* SDRAM 64MB */ 415 #elif BOARDTYPE == ixdp425 416 bootconfig.dram[0].pages = 0x10000000 / PAGE_SIZE; /* SDRAM 256MB */ 417 #endif 418 419 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 420 421 #ifdef VERBOSE_INIT_ARM 422 printf("kernsize=0x%x\n", kerneldatasize); 423 #endif 424 kerneldatasize += symbolsize; 425 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 426 427 /* 428 * Set up the variables that define the availablilty of 429 * physical memory. For now, we're going to set 430 * physical_freestart to 0x10200000 (where the kernel 431 * was loaded), and allocate the memory we need downwards. 432 * If we get too close to the L1 table that we set up, we 433 * will panic. We will update physical_freestart and 434 * physical_freeend later to reflect what pmap_bootstrap() 435 * wants to see. 436 * 437 * XXX pmap_bootstrap() needs an enema. 438 */ 439 physical_start = bootconfig.dram[0].address; 440 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 441 442 physical_freestart = physical_start 443 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 444 physical_freeend = physical_end; 445 446 physmem = (physical_end - physical_start) / PAGE_SIZE; 447 448 /* Tell the user about the memory */ 449 #ifdef VERBOSE_INIT_ARM 450 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 451 physical_start, physical_end - 1); 452 453 printf("Allocating page tables\n"); 454 #endif 455 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 456 457 freemempos = 0x10000000; 458 459 #ifdef VERBOSE_INIT_ARM 460 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 461 physical_start, physical_end); 462 #endif 463 464 /* Define a macro to simplify memory allocation */ 465 #define valloc_pages(var, np) \ 466 alloc_pages((var).pv_pa, (np)); \ 467 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 468 469 #if 0 470 #define alloc_pages(var, np) \ 471 physical_freeend -= ((np) * PAGE_SIZE); \ 472 if (physical_freeend < physical_freestart) \ 473 panic("initarm: out of memory"); \ 474 (var) = physical_freeend; \ 475 free_pages -= (np); \ 476 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 477 #else 478 #define alloc_pages(var, np) \ 479 (var) = freemempos; \ 480 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 481 freemempos += (np) * PAGE_SIZE; 482 #endif 483 484 loop1 = 0; 485 kernel_l1pt.pv_pa = 0; 486 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 487 /* Are we 16KB aligned for an L1 ? */ 488 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 489 && kernel_l1pt.pv_pa == 0) { 490 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 491 } else { 492 valloc_pages(kernel_pt_table[loop1], 493 L2_TABLE_SIZE / PAGE_SIZE); 494 ++loop1; 495 } 496 } 497 498 /* This should never be able to happen but better confirm that. */ 499 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 500 panic("initarm: Failed to align the kernel page directory"); 501 502 /* 503 * Allocate a page for the system page. 504 * This page will just contain the system vectors and can be 505 * shared by all processes. 506 */ 507 alloc_pages(systempage.pv_pa, 1); 508 509 /* Allocate stacks for all modes */ 510 valloc_pages(irqstack, IRQ_STACK_SIZE); 511 valloc_pages(abtstack, ABT_STACK_SIZE); 512 valloc_pages(undstack, UND_STACK_SIZE); 513 valloc_pages(kernelstack, UPAGES); 514 515 /* Allocate enough pages for cleaning the Mini-Data cache. */ 516 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 517 valloc_pages(minidataclean, 1); 518 519 #ifdef VERBOSE_INIT_ARM 520 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 521 irqstack.pv_va); 522 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 523 abtstack.pv_va); 524 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 525 undstack.pv_va); 526 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 527 kernelstack.pv_va); 528 #endif 529 530 /* 531 * XXX Defer this to later so that we can reclaim the memory 532 * XXX used by the RedBoot page tables. 533 */ 534 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 535 536 /* 537 * Ok we have allocated physical pages for the primary kernel 538 * page tables 539 */ 540 541 #ifdef VERBOSE_INIT_ARM 542 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 543 #endif 544 545 /* 546 * Now we start construction of the L1 page table 547 * We start by mapping the L2 page tables into the L1. 548 * This means that we can replace L1 mappings later on if necessary 549 */ 550 l1pagetable = kernel_l1pt.pv_pa; 551 552 /* Map the L2 pages tables in the L1 page table */ 553 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 554 &kernel_pt_table[KERNEL_PT_SYS]); 555 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 556 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 557 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 558 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 559 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 560 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 561 562 /* update the top of the kernel VM */ 563 pmap_curmaxkvaddr = 564 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 565 566 pmap_link_l2pt(l1pagetable, IXP425_IO_VBASE, 567 &kernel_pt_table[KERNEL_PT_IO]); 568 569 #ifdef VERBOSE_INIT_ARM 570 printf("Mapping kernel\n"); 571 #endif 572 573 /* Now we fill in the L2 pagetable for the kernel static code/data */ 574 { 575 extern char etext[], _end[]; 576 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 577 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 578 u_int logical; 579 580 textsize = (textsize + PGOFSET) & ~PGOFSET; 581 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 582 583 logical = 0x00200000; /* offset of kernel in RAM */ 584 585 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 586 physical_start + logical, textsize, 587 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 588 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 589 physical_start + logical, totalsize - textsize, 590 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 591 } 592 593 #ifdef VERBOSE_INIT_ARM 594 printf("Constructing L2 page tables\n"); 595 #endif 596 597 /* Map the stack pages */ 598 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 599 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 600 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 601 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 602 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 603 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 604 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 605 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 606 607 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 608 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 609 610 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 611 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 612 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 613 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 614 } 615 616 /* Map the Mini-Data cache clean area. */ 617 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 618 minidataclean.pv_pa); 619 620 /* Map the vector page. */ 621 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 622 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 623 624 /* 625 * Map the IXP425 registers 626 */ 627 pmap_devmap_bootstrap(l1pagetable, ixp425_devmap); 628 629 /* 630 * Give the XScale global cache clean code an appropriately 631 * sized chunk of unmapped VA space starting at 0xff000000 632 * (our device mappings end before this address). 633 */ 634 xscale_cache_clean_addr = 0xff000000U; 635 636 /* 637 * Now we have the real page tables in place so we can switch to them. 638 * Once this is done we will be running with the REAL kernel page 639 * tables. 640 */ 641 642 /* 643 * Update the physical_freestart/physical_freeend/free_pages 644 * variables. 645 */ 646 { 647 extern char _end[]; 648 649 physical_freestart = physical_start + 650 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 651 KERNEL_BASE); 652 physical_freeend = physical_end; 653 free_pages = 654 (physical_freeend - physical_freestart) / PAGE_SIZE; 655 } 656 657 /* Switch tables */ 658 #ifdef VERBOSE_INIT_ARM 659 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 660 physical_freestart, free_pages, free_pages); 661 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 662 #endif 663 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 664 setttb(kernel_l1pt.pv_pa); 665 cpu_tlb_flushID(); 666 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 667 668 /* 669 * Moved from cpu_startup() as data_abort_handler() references 670 * this during uvm init 671 */ 672 proc0paddr = (struct user *)kernelstack.pv_va; 673 lwp0.l_addr = proc0paddr; 674 675 #ifdef VERBOSE_INIT_ARM 676 printf("bootstrap done.\n"); 677 #endif 678 679 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 680 681 /* 682 * Pages were allocated during the secondary bootstrap for the 683 * stacks for different CPU modes. 684 * We must now set the r13 registers in the different CPU modes to 685 * point to these stacks. 686 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 687 * of the stack memory. 688 */ 689 #ifdef VERBOSE_INIT_ARM 690 printf("init subsystems: stacks "); 691 #endif 692 693 set_stackptr(PSR_IRQ32_MODE, 694 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 695 set_stackptr(PSR_ABT32_MODE, 696 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 697 set_stackptr(PSR_UND32_MODE, 698 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 699 700 /* 701 * Well we should set a data abort handler. 702 * Once things get going this will change as we will need a proper 703 * handler. 704 * Until then we will use a handler that just panics but tells us 705 * why. 706 * Initialisation of the vectors will just panic on a data abort. 707 * This just fills in a slighly better one. 708 */ 709 #ifdef VERBOSE_INIT_ARM 710 printf("vectors "); 711 #endif 712 data_abort_handler_address = (u_int)data_abort_handler; 713 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 714 undefined_handler_address = (u_int)undefinedinstruction_bounce; 715 716 /* Initialise the undefined instruction handlers */ 717 #ifdef VERBOSE_INIT_ARM 718 printf("undefined "); 719 #endif 720 undefined_init(); 721 722 /* Load memory into UVM. */ 723 #ifdef VERBOSE_INIT_ARM 724 printf("page "); 725 #endif 726 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 727 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 728 atop(physical_freestart), atop(physical_freeend), 729 VM_FREELIST_DEFAULT); 730 731 /* Boot strap pmap telling it where the kernel page table is */ 732 #ifdef VERBOSE_INIT_ARM 733 printf("pmap "); 734 #endif 735 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 736 KERNEL_VM_BASE + KERNEL_VM_SIZE); 737 738 /* Setup the IRQ system */ 739 #ifdef VERBOSE_INIT_ARM 740 printf("irq "); 741 #endif 742 ixp425_intr_init(); 743 #ifdef VERBOSE_INIT_ARM 744 printf("\nAll initialize done!\nNow Starting NetBSD, Hear we go!\n"); 745 #endif 746 747 #ifdef BOOTHOWTO 748 boothowto = BOOTHOWTO; 749 #endif 750 751 #ifdef IPKDB 752 /* Initialise ipkdb */ 753 ipkdb_init(); 754 if (boothowto & RB_KDB) 755 ipkdb_connect(0); 756 #endif 757 758 #if NKSYMS || defined(DDB) || defined(LKM) 759 /* Firmware doesn't load symbols. */ 760 ksyms_init(0, NULL, NULL); 761 #endif 762 763 #ifdef DDB 764 db_machine_init(); 765 if (boothowto & RB_KDB) 766 Debugger(); 767 #endif 768 769 /* We return the new stack pointer address */ 770 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 771 } 772 773 /* 774 * consinit 775 */ 776 void 777 consinit(void) 778 { 779 static int consinit_called; 780 static const bus_addr_t addrs[2] = { 781 IXP425_UART0_HWBASE, IXP425_UART1_HWBASE 782 }; 783 784 if (consinit_called != 0) 785 return; 786 787 consinit_called = 1; 788 789 pmap_devmap_register(ixp425_devmap); 790 791 if (comcnattach(&ixp425_a4x_bs_tag, addrs[comcnunit], 792 comcnspeed, IXP425_UART_FREQ, COM_TYPE_PXA2x0, comcnmode)) 793 panic("can't init serial console (UART%d)", comcnunit); 794 } 795
Indexes created Sun Oct 12 05:10:08 GMT 2025