ixdp425_machdep.c revision 1.7
1 /* $NetBSD: ixdp425_machdep.c,v 1.7 2003/09/25 14:11:18 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 <sys/cdefs.h> 73 __KERNEL_RCSID(0, "$NetBSD: ixdp425_machdep.c,v 1.7 2003/09/25 14:11:18 ichiro 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> 108 109 #include <arm/xscale/ixp425_sipvar.h> 110 #include <arm/xscale/ixp425_comvar.h> 111 112 #include "opt_ipkdb.h" 113 #include "ksyms.h" 114 115 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 116 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 117 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 118 119 /* 120 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 121 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 122 */ 123 #define KERNEL_VM_SIZE 0x0C000000 124 125 126 /* 127 * Address to call from cpu_reset() to reset the machine. 128 * This is machine architecture dependant as it varies depending 129 * on where the ROM appears when you turn the MMU off. 130 */ 131 132 u_int cpu_reset_address = 0x00000000; 133 134 /* Define various stack sizes in pages */ 135 #define IRQ_STACK_SIZE 1 136 #define ABT_STACK_SIZE 1 137 #ifdef IPKDB 138 #define UND_STACK_SIZE 2 139 #else 140 #define UND_STACK_SIZE 1 141 #endif 142 143 BootConfig bootconfig; /* Boot config storage */ 144 char *boot_args = NULL; 145 char *boot_file = NULL; 146 147 vm_offset_t physical_start; 148 vm_offset_t physical_freestart; 149 vm_offset_t physical_freeend; 150 vm_offset_t physical_end; 151 u_int free_pages; 152 vm_offset_t pagetables_start; 153 int physmem = 0; 154 155 /*int debug_flags;*/ 156 #ifndef PMAP_STATIC_L1S 157 int max_processes = 64; /* Default number */ 158 #endif /* !PMAP_STATIC_L1S */ 159 160 /* Physical and virtual addresses for some global pages */ 161 pv_addr_t systempage; 162 pv_addr_t irqstack; 163 pv_addr_t undstack; 164 pv_addr_t abtstack; 165 pv_addr_t kernelstack; 166 pv_addr_t minidataclean; 167 168 vm_offset_t msgbufphys; 169 170 extern u_int data_abort_handler_address; 171 extern u_int prefetch_abort_handler_address; 172 extern u_int undefined_handler_address; 173 extern int end; 174 175 #ifdef PMAP_DEBUG 176 extern int pmap_debug_level; 177 #endif 178 179 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 180 181 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 182 #define KERNEL_PT_KERNEL_NUM 4 183 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 184 /* L2 tables for mapping kernel VM */ 185 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1) 186 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 187 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 188 189 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 190 191 struct user *proc0paddr; 192 193 /* Prototypes */ 194 195 void consinit(void); 196 u_int cpu_get_control __P((void)); 197 198 /* 199 * Define the default console speed for the board. This is generally 200 * what the firmware provided with the board defaults to. 201 */ 202 #ifndef CONSPEED 203 #define CONSPEED B115200 204 #endif /* ! CONSPEED */ 205 206 #ifndef CONUNIT 207 #define CONUNIT 0 208 #endif 209 210 #ifndef CONMODE 211 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */ 212 #endif 213 214 int comcnspeed = CONSPEED; 215 int comcnmode = CONMODE; 216 int comcnunit = CONUNIT; 217 218 #if KGDB 219 #ifndef KGDB_DEVNAME 220 #error Must define KGDB_DEVNAME 221 #endif 222 const char kgdb_devname[] = KGDB_DEVNAME; 223 224 #ifndef KGDB_DEVADDR 225 #error Must define KGDB_DEVADDR 226 #endif 227 unsigned long kgdb_devaddr = KGDB_DEVADDR; 228 229 #ifndef KGDB_DEVRATE 230 #define KGDB_DEVRATE CONSPEED 231 #endif 232 int kgdb_devrate = KGDB_DEVRATE; 233 234 #ifndef KGDB_DEVMODE 235 #define KGDB_DEVMODE CONMODE 236 #endif 237 int kgdb_devmode = KGDB_DEVMODE; 238 #endif /* KGDB */ 239 240 /* 241 * void cpu_reboot(int howto, char *bootstr) 242 * 243 * Reboots the system 244 * 245 * Deal with any syncing, unmounting, dumping and shutdown hooks, 246 * then reset the CPU. 247 */ 248 void 249 cpu_reboot(int howto, char *bootstr) 250 { 251 #ifdef DIAGNOSTIC 252 /* info */ 253 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 254 #endif 255 256 /* 257 * If we are still cold then hit the air brakes 258 * and crash to earth fast 259 */ 260 if (cold) { 261 doshutdownhooks(); 262 printf("The operating system has halted.\n"); 263 printf("Please press any key to reboot.\n\n"); 264 cngetc(); 265 printf("rebooting...\n"); 266 goto reset; 267 } 268 269 /* Disable console buffering */ 270 271 /* 272 * If RB_NOSYNC was not specified sync the discs. 273 * Note: Unless cold is set to 1 here, syslogd will die during the 274 * unmount. It looks like syslogd is getting woken up only to find 275 * that it cannot page part of the binary in as the filesystem has 276 * been unmounted. 277 */ 278 if (!(howto & RB_NOSYNC)) 279 bootsync(); 280 281 /* Say NO to interrupts */ 282 splhigh(); 283 284 /* Do a dump if requested. */ 285 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 286 dumpsys(); 287 288 /* Run any shutdown hooks */ 289 doshutdownhooks(); 290 291 /* Make sure IRQ's are disabled */ 292 IRQdisable; 293 294 if (howto & RB_HALT) { 295 printf("The operating system has halted.\n"); 296 printf("Please press any key to reboot.\n\n"); 297 cngetc(); 298 } 299 300 printf("rebooting...\n\r"); 301 reset: 302 /* 303 * Make really really sure that all interrupts are disabled, 304 */ 305 (void) disable_interrupts(I32_bit|F32_bit); 306 /* 307 * XXX system reset routine 308 */ 309 (void) disable_interrupts(I32_bit|F32_bit); 310 /* ...and if that didn't work, just croak. */ 311 printf("RESET FAILED!\n"); 312 for (;;); 313 } 314 315 /* Static device mappings. */ 316 static const struct pmap_devmap ixp425_devmap[] = { 317 /* Physical/Virtual address for I/O space */ 318 { 319 IXP425_IO_VBASE, 320 IXP425_IO_HWBASE, 321 IXP425_IO_SIZE, 322 VM_PROT_READ|VM_PROT_WRITE, 323 PTE_NOCACHE, 324 }, 325 326 /* Expansion Bus */ 327 { 328 IXP425_EXP_VBASE, 329 IXP425_EXP_HWBASE, 330 IXP425_EXP_SIZE, 331 VM_PROT_READ|VM_PROT_WRITE, 332 PTE_NOCACHE, 333 }, 334 335 /* IXP425 PCI Configuration */ 336 { 337 IXP425_PCI_VBASE, 338 IXP425_PCI_HWBASE, 339 IXP425_PCI_SIZE, 340 VM_PROT_READ|VM_PROT_WRITE, 341 PTE_NOCACHE, 342 }, 343 344 /* PCI Memory Space */ 345 { 346 IXP425_PCI_MEM_VBASE, 347 IXP425_PCI_MEM_HWBASE, 348 IXP425_PCI_MEM_SIZE, 349 VM_PROT_READ|VM_PROT_WRITE, 350 PTE_NOCACHE, 351 }, 352 353 { 354 0, 355 0, 356 0, 357 0, 358 0, 359 } 360 }; 361 362 /* 363 * u_int initarm(...) 364 * 365 * Initial entry point on startup. This gets called before main() is 366 * entered. 367 * It should be responsible for setting up everything that must be 368 * in place when main is called. 369 * This includes 370 * Taking a copy of the boot configuration structure. 371 * Initialising the physical console so characters can be printed. 372 * Setting up page tables for the kernel 373 * Relocating the kernel to the bottom of physical memory 374 */ 375 u_int 376 initarm(void *arg) 377 { 378 extern vaddr_t xscale_cache_clean_addr; 379 #ifdef DIAGNOSTIC 380 extern vsize_t xscale_minidata_clean_size; 381 #endif 382 int loop; 383 int loop1; 384 u_int kerneldatasize, symbolsize; 385 u_int l1pagetable; 386 u_int freemempos; 387 pv_addr_t kernel_l1pt; 388 #if 0 389 paddr_t memstart; 390 psize_t memsize; 391 #endif 392 393 /* 394 * Since we map v0xf0000000 == p0xc8000000, it's possible for 395 * us to initialize the console now. 396 */ 397 consinit(); 398 399 #ifdef VERBOSE_INIT_ARM 400 /* Talk to the user */ 401 printf("\nNetBSD/evbarm (IXP425) booting ...\n"); 402 #endif 403 404 /* 405 * Heads up ... Setup the CPU / MMU / TLB functions 406 */ 407 if (set_cpufuncs()) 408 panic("cpu not recognized!"); 409 410 /* XXX overwrite bootconfig to hardcoded values */ 411 bootconfig.dramblocks = 1; 412 bootconfig.dram[0].address = 0x10000000; 413 /* XXX */ 414 #if BOARDTYPE == zao425 415 bootconfig.dram[0].pages = 0x04000000 / PAGE_SIZE; /* SDRAM 64MB */ 416 #elif BOARDTYPE == ixdp425 417 bootconfig.dram[0].pages = 0x10000000 / PAGE_SIZE; /* SDRAM 256MB */ 418 #endif 419 420 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 421 422 #ifdef VERBOSE_INIT_ARM 423 printf("kernsize=0x%x\n", kerneldatasize); 424 #endif 425 kerneldatasize += symbolsize; 426 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 427 428 /* 429 * Set up the variables that define the availablilty of 430 * physical memory. For now, we're going to set 431 * physical_freestart to 0x10200000 (where the kernel 432 * was loaded), and allocate the memory we need downwards. 433 * If we get too close to the L1 table that we set up, we 434 * will panic. We will update physical_freestart and 435 * physical_freeend later to reflect what pmap_bootstrap() 436 * wants to see. 437 * 438 * XXX pmap_bootstrap() needs an enema. 439 */ 440 physical_start = bootconfig.dram[0].address; 441 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 442 443 physical_freestart = physical_start 444 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 445 physical_freeend = physical_end; 446 447 physmem = (physical_end - physical_start) / PAGE_SIZE; 448 449 /* Tell the user about the memory */ 450 #ifdef VERBOSE_INIT_ARM 451 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 452 physical_start, physical_end - 1); 453 454 printf("Allocating page tables\n"); 455 #endif 456 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 457 458 freemempos = 0x10000000; 459 460 #ifdef VERBOSE_INIT_ARM 461 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 462 physical_start, physical_end); 463 #endif 464 465 /* Define a macro to simplify memory allocation */ 466 #define valloc_pages(var, np) \ 467 alloc_pages((var).pv_pa, (np)); \ 468 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 469 470 #if 0 471 #define alloc_pages(var, np) \ 472 physical_freeend -= ((np) * PAGE_SIZE); \ 473 if (physical_freeend < physical_freestart) \ 474 panic("initarm: out of memory"); \ 475 (var) = physical_freeend; \ 476 free_pages -= (np); \ 477 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 478 #else 479 #define alloc_pages(var, np) \ 480 (var) = freemempos; \ 481 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 482 freemempos += (np) * PAGE_SIZE; 483 #endif 484 485 loop1 = 0; 486 kernel_l1pt.pv_pa = 0; 487 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 488 /* Are we 16KB aligned for an L1 ? */ 489 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 490 && kernel_l1pt.pv_pa == 0) { 491 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 492 } else { 493 valloc_pages(kernel_pt_table[loop1], 494 L2_TABLE_SIZE / PAGE_SIZE); 495 ++loop1; 496 } 497 } 498 499 /* This should never be able to happen but better confirm that. */ 500 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 501 panic("initarm: Failed to align the kernel page directory"); 502 503 /* 504 * Allocate a page for the system page mapped to V0x00000000 505 * This page will just contain the system vectors and can be 506 * shared by all processes. 507 */ 508 alloc_pages(systempage.pv_pa, 1); 509 510 /* Allocate stacks for all modes */ 511 valloc_pages(irqstack, IRQ_STACK_SIZE); 512 valloc_pages(abtstack, ABT_STACK_SIZE); 513 valloc_pages(undstack, UND_STACK_SIZE); 514 valloc_pages(kernelstack, UPAGES); 515 516 /* Allocate enough pages for cleaning the Mini-Data cache. */ 517 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 518 valloc_pages(minidataclean, 1); 519 520 #ifdef VERBOSE_INIT_ARM 521 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 522 irqstack.pv_va); 523 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 524 abtstack.pv_va); 525 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 526 undstack.pv_va); 527 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 528 kernelstack.pv_va); 529 #endif 530 531 /* 532 * XXX Defer this to later so that we can reclaim the memory 533 * XXX used by the RedBoot page tables. 534 */ 535 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 536 537 /* 538 * Ok we have allocated physical pages for the primary kernel 539 * page tables 540 */ 541 542 #ifdef VERBOSE_INIT_ARM 543 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 544 #endif 545 546 /* 547 * Now we start construction of the L1 page table 548 * We start by mapping the L2 page tables into the L1. 549 * This means that we can replace L1 mappings later on if necessary 550 */ 551 l1pagetable = kernel_l1pt.pv_pa; 552 553 /* Map the L2 pages tables in the L1 page table */ 554 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 555 &kernel_pt_table[KERNEL_PT_SYS]); 556 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 557 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 558 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 559 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 560 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 561 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 562 563 /* update the top of the kernel VM */ 564 pmap_curmaxkvaddr = 565 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 566 567 pmap_link_l2pt(l1pagetable, IXP425_IO_VBASE, 568 &kernel_pt_table[KERNEL_PT_IO]); 569 570 #ifdef VERBOSE_INIT_ARM 571 printf("Mapping kernel\n"); 572 #endif 573 574 /* Now we fill in the L2 pagetable for the kernel static code/data */ 575 { 576 extern char etext[], _end[]; 577 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 578 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 579 u_int logical; 580 581 textsize = (textsize + PGOFSET) & ~PGOFSET; 582 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 583 584 logical = 0x00200000; /* offset of kernel in RAM */ 585 586 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 587 physical_start + logical, textsize, 588 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 589 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 590 physical_start + logical, totalsize - textsize, 591 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 592 } 593 594 #ifdef VERBOSE_INIT_ARM 595 printf("Constructing L2 page tables\n"); 596 #endif 597 598 /* Map the stack pages */ 599 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 600 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 601 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 602 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 603 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 604 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 605 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 606 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 607 608 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 609 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 610 611 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 612 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 613 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 614 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 615 } 616 617 /* Map the Mini-Data cache clean area. */ 618 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 619 minidataclean.pv_pa); 620 621 /* Map the vector page. */ 622 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 623 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 624 625 /* 626 * Map the IXP425 registers 627 */ 628 pmap_devmap_bootstrap(l1pagetable, ixp425_devmap); 629 630 /* 631 * Give the XScale global cache clean code an appropriately 632 * sized chunk of unmapped VA space starting at 0xff000000 633 * (our device mappings end before this address). 634 */ 635 xscale_cache_clean_addr = 0xff000000U; 636 637 /* 638 * Now we have the real page tables in place so we can switch to them. 639 * Once this is done we will be running with the REAL kernel page 640 * tables. 641 */ 642 643 /* 644 * Update the physical_freestart/physical_freeend/free_pages 645 * variables. 646 */ 647 { 648 extern char _end[]; 649 650 physical_freestart = physical_start + 651 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 652 KERNEL_BASE); 653 physical_freeend = physical_end; 654 free_pages = 655 (physical_freeend - physical_freestart) / PAGE_SIZE; 656 } 657 658 /* Switch tables */ 659 #ifdef VERBOSE_INIT_ARM 660 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 661 physical_freestart, free_pages, free_pages); 662 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 663 #endif 664 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 665 setttb(kernel_l1pt.pv_pa); 666 cpu_tlb_flushID(); 667 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 668 669 /* 670 * Moved from cpu_startup() as data_abort_handler() references 671 * this during uvm init 672 */ 673 proc0paddr = (struct user *)kernelstack.pv_va; 674 lwp0.l_addr = proc0paddr; 675 676 #ifdef VERBOSE_INIT_ARM 677 printf("bootstrap done.\n"); 678 #endif 679 680 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 681 682 /* 683 * Pages were allocated during the secondary bootstrap for the 684 * stacks for different CPU modes. 685 * We must now set the r13 registers in the different CPU modes to 686 * point to these stacks. 687 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 688 * of the stack memory. 689 */ 690 #ifdef VERBOSE_INIT_ARM 691 printf("init subsystems: stacks "); 692 #endif 693 694 set_stackptr(PSR_IRQ32_MODE, 695 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 696 set_stackptr(PSR_ABT32_MODE, 697 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 698 set_stackptr(PSR_UND32_MODE, 699 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 700 701 /* 702 * Well we should set a data abort handler. 703 * Once things get going this will change as we will need a proper 704 * handler. 705 * Until then we will use a handler that just panics but tells us 706 * why. 707 * Initialisation of the vectors will just panic on a data abort. 708 * This just fills in a slighly better one. 709 */ 710 #ifdef VERBOSE_INIT_ARM 711 printf("vectors "); 712 #endif 713 data_abort_handler_address = (u_int)data_abort_handler; 714 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 715 undefined_handler_address = (u_int)undefinedinstruction_bounce; 716 717 /* Initialise the undefined instruction handlers */ 718 #ifdef VERBOSE_INIT_ARM 719 printf("undefined "); 720 #endif 721 undefined_init(); 722 723 /* Load memory into UVM. */ 724 #ifdef VERBOSE_INIT_ARM 725 printf("page "); 726 #endif 727 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 728 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 729 atop(physical_freestart), atop(physical_freeend), 730 VM_FREELIST_DEFAULT); 731 732 /* Boot strap pmap telling it where the kernel page table is */ 733 #ifdef VERBOSE_INIT_ARM 734 printf("pmap "); 735 #endif 736 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 737 KERNEL_VM_BASE + KERNEL_VM_SIZE); 738 739 /* Setup the IRQ system */ 740 #ifdef VERBOSE_INIT_ARM 741 printf("irq "); 742 #endif 743 ixp425_intr_init(); 744 #ifdef VERBOSE_INIT_ARM 745 printf("\nAll initialize done!\nNow Starting NetBSD, Hear we go!\n"); 746 #endif 747 748 #ifdef BOOTHOWTO 749 boothowto = BOOTHOWTO; 750 #endif 751 752 #ifdef IPKDB 753 /* Initialise ipkdb */ 754 ipkdb_init(); 755 if (boothowto & RB_KDB) 756 ipkdb_connect(0); 757 #endif 758 759 #if NKSYMS || defined(DDB) || defined(LKM) 760 /* Firmware doesn't load symbols. */ 761 ksyms_init(0, NULL, NULL); 762 #endif 763 764 #ifdef DDB 765 db_machine_init(); 766 if (boothowto & RB_KDB) 767 Debugger(); 768 #endif 769 770 /* We return the new stack pointer address */ 771 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 772 } 773 774 /* 775 * consinit 776 */ 777 void 778 consinit(void) 779 { 780 static int consinit_called; 781 782 if (consinit_called != 0) 783 return; 784 785 consinit_called = 1; 786 787 pmap_devmap_register(ixp425_devmap); 788 789 if (ixdp_ixp4xx_comcnattach(&ixpsip_bs_tag, comcnunit, 790 comcnspeed, FREQ, comcnmode)) 791 panic("can't init serial console (UART%d)", comcnunit); 792 } 793
Indexes created Sat Oct 11 19:10:01 GMT 2025