ixdp425_machdep.c revision 1.4
1 /* $NetBSD: ixdp425_machdep.c,v 1.4 2003/06/01 01:49:57 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 /* 313 * Mapping table for core kernel memory. This memory is mapped at init 314 * time with section mappings. 315 */ 316 struct l1_sec_map { 317 vaddr_t va; 318 vaddr_t pa; 319 vsize_t size; 320 vm_prot_t prot; 321 int cache; 322 } l1_sec_table[] = { 323 /* 324 * Map the on-board devices VA == PA so that we can access them 325 * with the MMU on or off. 326 */ 327 { 328 IXP425_UART0_HWBASE, 329 IXP425_UART0_HWBASE, 330 IXP425_REG_SIZE * 2, 331 VM_PROT_READ|VM_PROT_WRITE, 332 PTE_NOCACHE, 333 }, 334 { 335 0, 336 0, 337 0, 338 0, 339 0, 340 } 341 }; 342 343 /* 344 * u_int initarm(...) 345 * 346 * Initial entry point on startup. This gets called before main() is 347 * entered. 348 * It should be responsible for setting up everything that must be 349 * in place when main is called. 350 * This includes 351 * Taking a copy of the boot configuration structure. 352 * Initialising the physical console so characters can be printed. 353 * Setting up page tables for the kernel 354 * Relocating the kernel to the bottom of physical memory 355 */ 356 u_int 357 initarm(void *arg) 358 { 359 extern vaddr_t xscale_cache_clean_addr; 360 #ifdef DIAGNOSTIC 361 extern vsize_t xscale_minidata_clean_size; 362 #endif 363 int loop; 364 int loop1; 365 u_int kerneldatasize, symbolsize; 366 u_int l1pagetable; 367 u_int freemempos; 368 pv_addr_t kernel_l1pt; 369 #if 0 370 paddr_t memstart; 371 psize_t memsize; 372 #endif 373 374 /* 375 * Since we map v0xf0000000 == p0xc8000000, it's possible for 376 * us to initialize the console now. 377 */ 378 consinit(); 379 380 #ifdef VERBOSE_INIT_ARM 381 /* Talk to the user */ 382 printf("\nNetBSD/evbarm (IXP425) booting ...\n"); 383 #endif 384 385 /* 386 * Heads up ... Setup the CPU / MMU / TLB functions 387 */ 388 if (set_cpufuncs()) 389 panic("cpu not recognized!"); 390 391 /* XXX overwrite bootconfig to hardcoded values */ 392 bootconfig.dramblocks = 1; 393 bootconfig.dram[0].address = 0x10000000; 394 bootconfig.dram[0].pages = 0x04000000 / PAGE_SIZE; /* SDRAM 64MB */ 395 396 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 397 398 #ifdef VERBOSE_INIT_ARM 399 printf("kernsize=0x%x\n", kerneldatasize); 400 #endif 401 kerneldatasize += symbolsize; 402 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 403 404 /* 405 * Set up the variables that define the availablilty of 406 * physical memory. For now, we're going to set 407 * physical_freestart to 0x10200000 (where the kernel 408 * was loaded), and allocate the memory we need downwards. 409 * If we get too close to the L1 table that we set up, we 410 * will panic. We will update physical_freestart and 411 * physical_freeend later to reflect what pmap_bootstrap() 412 * wants to see. 413 * 414 * XXX pmap_bootstrap() needs an enema. 415 */ 416 physical_start = bootconfig.dram[0].address; 417 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 418 419 physical_freestart = physical_start 420 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 421 physical_freeend = physical_end; 422 423 physmem = (physical_end - physical_start) / PAGE_SIZE; 424 425 /* Tell the user about the memory */ 426 #ifdef VERBOSE_INIT_ARM 427 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 428 physical_start, physical_end - 1); 429 430 printf("Allocating page tables\n"); 431 #endif 432 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 433 434 freemempos = 0x10000000; 435 436 #ifdef VERBOSE_INIT_ARM 437 printf("CP15 Register1 = 0x%08x\n", cpu_get_control()); 438 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 439 physical_start, physical_end); 440 #endif 441 442 /* Define a macro to simplify memory allocation */ 443 #define valloc_pages(var, np) \ 444 alloc_pages((var).pv_pa, (np)); \ 445 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 446 447 #if 0 448 #define alloc_pages(var, np) \ 449 physical_freeend -= ((np) * PAGE_SIZE); \ 450 if (physical_freeend < physical_freestart) \ 451 panic("initarm: out of memory"); \ 452 (var) = physical_freeend; \ 453 free_pages -= (np); \ 454 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 455 #else 456 #define alloc_pages(var, np) \ 457 (var) = freemempos; \ 458 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 459 freemempos += (np) * PAGE_SIZE; 460 #endif 461 462 loop1 = 0; 463 kernel_l1pt.pv_pa = 0; 464 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 465 /* Are we 16KB aligned for an L1 ? */ 466 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 467 && kernel_l1pt.pv_pa == 0) { 468 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 469 } else { 470 valloc_pages(kernel_pt_table[loop1], 471 L2_TABLE_SIZE / PAGE_SIZE); 472 ++loop1; 473 } 474 } 475 476 /* This should never be able to happen but better confirm that. */ 477 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 478 panic("initarm: Failed to align the kernel page directory"); 479 480 /* 481 * Allocate a page for the system page mapped to V0x00000000 482 * This page will just contain the system vectors and can be 483 * shared by all processes. 484 */ 485 alloc_pages(systempage.pv_pa, 1); 486 487 /* Allocate stacks for all modes */ 488 valloc_pages(irqstack, IRQ_STACK_SIZE); 489 valloc_pages(abtstack, ABT_STACK_SIZE); 490 valloc_pages(undstack, UND_STACK_SIZE); 491 valloc_pages(kernelstack, UPAGES); 492 493 /* Allocate enough pages for cleaning the Mini-Data cache. */ 494 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 495 valloc_pages(minidataclean, 1); 496 497 #ifdef VERBOSE_INIT_ARM 498 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 499 irqstack.pv_va); 500 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 501 abtstack.pv_va); 502 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 503 undstack.pv_va); 504 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 505 kernelstack.pv_va); 506 #endif 507 508 /* 509 * XXX Defer this to later so that we can reclaim the memory 510 * XXX used by the RedBoot page tables. 511 */ 512 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 513 514 /* 515 * Ok we have allocated physical pages for the primary kernel 516 * page tables 517 */ 518 519 #ifdef VERBOSE_INIT_ARM 520 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 521 #endif 522 523 /* 524 * Now we start construction of the L1 page table 525 * We start by mapping the L2 page tables into the L1. 526 * This means that we can replace L1 mappings later on if necessary 527 */ 528 l1pagetable = kernel_l1pt.pv_pa; 529 530 /* Map the L2 pages tables in the L1 page table */ 531 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 532 &kernel_pt_table[KERNEL_PT_SYS]); 533 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 534 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 535 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 536 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 537 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 538 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 539 540 /* update the top of the kernel VM */ 541 pmap_curmaxkvaddr = 542 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 543 544 pmap_link_l2pt(l1pagetable, IXP425_IO_VBASE, 545 &kernel_pt_table[KERNEL_PT_IO]); 546 547 #ifdef VERBOSE_INIT_ARM 548 printf("Mapping kernel\n"); 549 #endif 550 551 /* Now we fill in the L2 pagetable for the kernel static code/data */ 552 { 553 extern char etext[], _end[]; 554 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 555 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 556 u_int logical; 557 558 textsize = (textsize + PGOFSET) & ~PGOFSET; 559 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 560 561 logical = 0x00200000; /* offset of kernel in RAM */ 562 563 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 564 physical_start + logical, textsize, 565 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 566 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 567 physical_start + logical, totalsize - textsize, 568 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 569 } 570 571 #ifdef VERBOSE_INIT_ARM 572 printf("Constructing L2 page tables\n"); 573 #endif 574 575 /* Map the stack pages */ 576 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 577 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 578 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 579 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 580 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 581 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 582 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 583 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 584 585 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 586 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 587 588 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 589 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 590 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 591 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 592 } 593 594 /* Map the Mini-Data cache clean area. */ 595 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 596 minidataclean.pv_pa); 597 598 /* Map the vector page. */ 599 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 600 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 601 602 /* 603 * Map the IXP425 registers 604 */ 605 606 ixp425_pmap_io_reg(l1pagetable); 607 608 /* 609 * Map devices we can map w/ section mappings. 610 */ 611 loop = 0; 612 while (l1_sec_table[loop].size) { 613 vm_size_t sz; 614 615 #ifdef VERBOSE_INIT_ARM 616 printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa, 617 l1_sec_table[loop].pa + l1_sec_table[loop].size - 1, 618 l1_sec_table[loop].va); 619 #endif 620 for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_S_SIZE) 621 pmap_map_section(l1pagetable, 622 l1_sec_table[loop].va + sz, 623 l1_sec_table[loop].pa + sz, 624 l1_sec_table[loop].prot, 625 l1_sec_table[loop].cache); 626 ++loop; 627 } 628 629 630 /* 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 extern struct bus_space ixpsip_bs_tag; 781 static int consinit_called; 782 783 if (consinit_called != 0) 784 return; 785 786 consinit_called = 1; 787 if (ixdp_ixp4xx_comcnattach(&ixpsip_bs_tag, comcnunit, 788 comcnspeed, FREQ, comcnmode)) 789 panic("can't init serial console (UART%d)", comcnunit); 790 } 791
Indexes created Sun Oct 12 05:10:08 GMT 2025