ixdp425_machdep.c revision 1.13.10.1
1 /* $NetBSD: ixdp425_machdep.c,v 1.13.10.1 2006/06/21 14:50:47 yamt 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 1.13.10.1 2006/06/21 14:50:47 yamt 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 <evbarm/ixdp425/ixdp425reg.h> 111 112 #include "com.h" 113 #if NCOM > 0 114 #include <dev/ic/comreg.h> 115 #include <dev/ic/comvar.h> 116 #endif 117 118 #include "opt_ipkdb.h" 119 #include "ksyms.h" 120 121 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 122 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 123 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 124 125 /* 126 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 127 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 128 */ 129 #define KERNEL_VM_SIZE 0x0C000000 130 131 132 /* 133 * Address to call from cpu_reset() to reset the machine. 134 * This is machine architecture dependant as it varies depending 135 * on where the ROM appears when you turn the MMU off. 136 */ 137 138 u_int cpu_reset_address = 0x00000000; 139 140 /* Define various stack sizes in pages */ 141 #define IRQ_STACK_SIZE 1 142 #define ABT_STACK_SIZE 1 143 #ifdef IPKDB 144 #define UND_STACK_SIZE 2 145 #else 146 #define UND_STACK_SIZE 1 147 #endif 148 149 BootConfig bootconfig; /* Boot config storage */ 150 char *boot_args = NULL; 151 char *boot_file = NULL; 152 153 vm_offset_t physical_start; 154 vm_offset_t physical_freestart; 155 vm_offset_t physical_freeend; 156 vm_offset_t physical_end; 157 u_int free_pages; 158 vm_offset_t pagetables_start; 159 int physmem = 0; 160 161 /* Physical and virtual addresses for some global pages */ 162 pv_addr_t systempage; 163 pv_addr_t irqstack; 164 pv_addr_t undstack; 165 pv_addr_t abtstack; 166 pv_addr_t kernelstack; 167 pv_addr_t minidataclean; 168 169 vm_offset_t msgbufphys; 170 171 extern u_int data_abort_handler_address; 172 extern u_int prefetch_abort_handler_address; 173 extern u_int undefined_handler_address; 174 extern int end; 175 176 #ifdef PMAP_DEBUG 177 extern int pmap_debug_level; 178 #endif 179 180 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 181 182 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 183 #define KERNEL_PT_KERNEL_NUM 4 184 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 185 /* L2 tables for mapping kernel VM */ 186 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1) 187 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 188 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 189 190 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 191 192 struct user *proc0paddr; 193 194 /* Prototypes */ 195 196 void consinit(void); 197 u_int cpu_get_control __P((void)); 198 199 /* 200 * Define the default console speed for the board. This is generally 201 * what the firmware provided with the board defaults to. 202 */ 203 #ifndef CONSPEED 204 #define CONSPEED B115200 205 #endif /* ! CONSPEED */ 206 207 #ifndef CONUNIT 208 #define CONUNIT 0 209 #endif 210 211 #ifndef CONMODE 212 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */ 213 #endif 214 215 int comcnspeed = CONSPEED; 216 int comcnmode = CONMODE; 217 int comcnunit = CONUNIT; 218 219 #if KGDB 220 #ifndef KGDB_DEVNAME 221 #error Must define KGDB_DEVNAME 222 #endif 223 const char kgdb_devname[] = KGDB_DEVNAME; 224 225 #ifndef KGDB_DEVADDR 226 #error Must define KGDB_DEVADDR 227 #endif 228 unsigned long kgdb_devaddr = KGDB_DEVADDR; 229 230 #ifndef KGDB_DEVRATE 231 #define KGDB_DEVRATE CONSPEED 232 #endif 233 int kgdb_devrate = KGDB_DEVRATE; 234 235 #ifndef KGDB_DEVMODE 236 #define KGDB_DEVMODE CONMODE 237 #endif 238 int kgdb_devmode = KGDB_DEVMODE; 239 #endif /* KGDB */ 240 241 /* 242 * void cpu_reboot(int howto, char *bootstr) 243 * 244 * Reboots the system 245 * 246 * Deal with any syncing, unmounting, dumping and shutdown hooks, 247 * then reset the CPU. 248 */ 249 void 250 cpu_reboot(int howto, char *bootstr) 251 { 252 u_int32_t reg; 253 254 #ifdef DIAGNOSTIC 255 /* info */ 256 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 257 #endif 258 259 /* 260 * If we are still cold then hit the air brakes 261 * and crash to earth fast 262 */ 263 if (cold) { 264 doshutdownhooks(); 265 printf("The operating system has halted.\n"); 266 printf("Please press any key to reboot.\n\n"); 267 cngetc(); 268 printf("rebooting...\n"); 269 goto reset; 270 } 271 272 /* Disable console buffering */ 273 274 /* 275 * If RB_NOSYNC was not specified sync the discs. 276 * Note: Unless cold is set to 1 here, syslogd will die during the 277 * unmount. It looks like syslogd is getting woken up only to find 278 * that it cannot page part of the binary in as the filesystem has 279 * been unmounted. 280 */ 281 if (!(howto & RB_NOSYNC)) 282 bootsync(); 283 284 /* Say NO to interrupts */ 285 splhigh(); 286 287 /* Do a dump if requested. */ 288 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 289 dumpsys(); 290 291 /* Run any shutdown hooks */ 292 doshutdownhooks(); 293 294 /* Make sure IRQ's are disabled */ 295 IRQdisable; 296 297 if (howto & RB_HALT) { 298 printf("The operating system has halted.\n"); 299 printf("Please press any key to reboot.\n\n"); 300 cngetc(); 301 } 302 303 printf("rebooting...\n\r"); 304 reset: 305 /* 306 * Make really really sure that all interrupts are disabled, 307 */ 308 (void) disable_interrupts(I32_bit|F32_bit); 309 IXPREG(IXP425_INT_ENABLE) = 0; 310 311 /* 312 * Map the boot Flash device down at physical address 0. 313 * This is safe since NetBSD runs out of an alias of 314 * SDRAM at 0x10000000. 315 */ 316 reg = EXP_CSR_READ_4(ixpsip_softc, EXP_CNFG0_OFFSET); 317 reg |= EXP_CNFG0_MEM_MAP; 318 EXP_CSR_WRITE_4(ixpsip_softc, EXP_CNFG0_OFFSET, reg); 319 320 /* 321 * Jump into the bootcode's reset vector 322 * 323 * XXX: 324 * Redboot doesn't like the state in which we leave the PCI 325 * ethernet card, and so fails to detect it on reboot. This 326 * pretty much necessitates a hard reset/power cycle to be 327 * able to download a new kernel image over ethernet. 328 * 329 * I suspect this is due to a bug in Redboot's i82557 driver. 330 */ 331 cpu_reset(); 332 333 /* ...and if that didn't work, just croak. */ 334 printf("RESET FAILED!\n"); 335 for (;;); 336 } 337 338 /* Static device mappings. */ 339 static const struct pmap_devmap ixp425_devmap[] = { 340 /* Physical/Virtual address for I/O space */ 341 { 342 IXP425_IO_VBASE, 343 IXP425_IO_HWBASE, 344 IXP425_IO_SIZE, 345 VM_PROT_READ|VM_PROT_WRITE, 346 PTE_NOCACHE, 347 }, 348 349 /* Expansion Bus */ 350 { 351 IXP425_EXP_VBASE, 352 IXP425_EXP_HWBASE, 353 IXP425_EXP_SIZE, 354 VM_PROT_READ|VM_PROT_WRITE, 355 PTE_NOCACHE, 356 }, 357 358 /* IXP425 PCI Configuration */ 359 { 360 IXP425_PCI_VBASE, 361 IXP425_PCI_HWBASE, 362 IXP425_PCI_SIZE, 363 VM_PROT_READ|VM_PROT_WRITE, 364 PTE_NOCACHE, 365 }, 366 367 /* SDRAM Controller */ 368 { 369 IXP425_MCU_VBASE, 370 IXP425_MCU_HWBASE, 371 IXP425_MCU_SIZE, 372 VM_PROT_READ|VM_PROT_WRITE, 373 PTE_NOCACHE, 374 }, 375 376 /* PCI Memory Space */ 377 { 378 IXP425_PCI_MEM_VBASE, 379 IXP425_PCI_MEM_HWBASE, 380 IXP425_PCI_MEM_SIZE, 381 VM_PROT_READ|VM_PROT_WRITE, 382 PTE_NOCACHE, 383 }, 384 385 { 386 0, 387 0, 388 0, 389 0, 390 0, 391 } 392 }; 393 394 /* 395 * u_int initarm(...) 396 * 397 * Initial entry point on startup. This gets called before main() is 398 * entered. 399 * It should be responsible for setting up everything that must be 400 * in place when main is called. 401 * This includes 402 * Taking a copy of the boot configuration structure. 403 * Initialising the physical console so characters can be printed. 404 * Setting up page tables for the kernel 405 * Relocating the kernel to the bottom of physical memory 406 */ 407 u_int 408 initarm(void *arg) 409 { 410 extern vaddr_t xscale_cache_clean_addr; 411 #ifdef DIAGNOSTIC 412 extern vsize_t xscale_minidata_clean_size; 413 #endif 414 int loop; 415 int loop1; 416 u_int kerneldatasize; 417 u_int l1pagetable; 418 u_int freemempos; 419 pv_addr_t kernel_l1pt; 420 421 /* 422 * Since we map v0xf0000000 == p0xc8000000, it's possible for 423 * us to initialize the console now. 424 */ 425 consinit(); 426 427 #ifdef VERBOSE_INIT_ARM 428 /* Talk to the user */ 429 printf("\nNetBSD/evbarm (Intel IXDP425) booting ...\n"); 430 #endif 431 432 /* 433 * Heads up ... Setup the CPU / MMU / TLB functions 434 */ 435 if (set_cpufuncs()) 436 panic("cpu not recognized!"); 437 438 /* XXX overwrite bootconfig to hardcoded values */ 439 bootconfig.dramblocks = 1; 440 bootconfig.dram[0].address = 0x10000000; 441 bootconfig.dram[0].pages = ixp425_sdram_size() / PAGE_SIZE; 442 443 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 444 445 #ifdef VERBOSE_INIT_ARM 446 printf("kernsize=0x%x\n", kerneldatasize); 447 #endif 448 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 449 450 /* 451 * Set up the variables that define the availablilty of 452 * physical memory. For now, we're going to set 453 * physical_freestart to 0x10200000 (where the kernel 454 * was loaded), and allocate the memory we need downwards. 455 * If we get too close to the L1 table that we set up, we 456 * will panic. We will update physical_freestart and 457 * physical_freeend later to reflect what pmap_bootstrap() 458 * wants to see. 459 * 460 * XXX pmap_bootstrap() needs an enema. 461 */ 462 physical_start = bootconfig.dram[0].address; 463 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 464 465 physical_freestart = physical_start 466 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 467 physical_freeend = physical_end; 468 469 physmem = (physical_end - physical_start) / PAGE_SIZE; 470 471 /* Tell the user about the memory */ 472 #ifdef VERBOSE_INIT_ARM 473 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 474 physical_start, physical_end - 1); 475 476 printf("Allocating page tables\n"); 477 #endif 478 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 479 480 freemempos = 0x10000000; 481 482 #ifdef VERBOSE_INIT_ARM 483 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 484 physical_start, physical_end); 485 #endif 486 487 /* Define a macro to simplify memory allocation */ 488 #define valloc_pages(var, np) \ 489 alloc_pages((var).pv_pa, (np)); \ 490 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 491 492 #if 0 493 #define alloc_pages(var, np) \ 494 physical_freeend -= ((np) * PAGE_SIZE); \ 495 if (physical_freeend < physical_freestart) \ 496 panic("initarm: out of memory"); \ 497 (var) = physical_freeend; \ 498 free_pages -= (np); \ 499 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 500 #else 501 #define alloc_pages(var, np) \ 502 (var) = freemempos; \ 503 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 504 freemempos += (np) * PAGE_SIZE; 505 #endif 506 507 loop1 = 0; 508 kernel_l1pt.pv_pa = 0; 509 kernel_l1pt.pv_va = 0; 510 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 511 /* Are we 16KB aligned for an L1 ? */ 512 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 513 && kernel_l1pt.pv_pa == 0) { 514 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 515 } else { 516 valloc_pages(kernel_pt_table[loop1], 517 L2_TABLE_SIZE / PAGE_SIZE); 518 ++loop1; 519 } 520 } 521 522 /* This should never be able to happen but better confirm that. */ 523 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 524 panic("initarm: Failed to align the kernel page directory"); 525 526 /* 527 * Allocate a page for the system page. 528 * This page will just contain the system vectors and can be 529 * shared by all processes. 530 */ 531 alloc_pages(systempage.pv_pa, 1); 532 533 /* Allocate stacks for all modes */ 534 valloc_pages(irqstack, IRQ_STACK_SIZE); 535 valloc_pages(abtstack, ABT_STACK_SIZE); 536 valloc_pages(undstack, UND_STACK_SIZE); 537 valloc_pages(kernelstack, UPAGES); 538 539 /* Allocate enough pages for cleaning the Mini-Data cache. */ 540 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 541 valloc_pages(minidataclean, 1); 542 543 #ifdef VERBOSE_INIT_ARM 544 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 545 irqstack.pv_va); 546 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 547 abtstack.pv_va); 548 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 549 undstack.pv_va); 550 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 551 kernelstack.pv_va); 552 #endif 553 554 /* 555 * XXX Defer this to later so that we can reclaim the memory 556 * XXX used by the RedBoot page tables. 557 */ 558 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 559 560 /* 561 * Ok we have allocated physical pages for the primary kernel 562 * page tables 563 */ 564 565 #ifdef VERBOSE_INIT_ARM 566 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 567 #endif 568 569 /* 570 * Now we start construction of the L1 page table 571 * We start by mapping the L2 page tables into the L1. 572 * This means that we can replace L1 mappings later on if necessary 573 */ 574 l1pagetable = kernel_l1pt.pv_pa; 575 576 /* Map the L2 pages tables in the L1 page table */ 577 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 578 &kernel_pt_table[KERNEL_PT_SYS]); 579 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 580 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 581 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 582 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 583 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 584 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 585 586 /* update the top of the kernel VM */ 587 pmap_curmaxkvaddr = 588 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 589 590 pmap_link_l2pt(l1pagetable, IXP425_IO_VBASE, 591 &kernel_pt_table[KERNEL_PT_IO]); 592 593 #ifdef VERBOSE_INIT_ARM 594 printf("Mapping kernel\n"); 595 #endif 596 597 /* Now we fill in the L2 pagetable for the kernel static code/data */ 598 { 599 extern char etext[], _end[]; 600 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 601 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 602 u_int logical; 603 604 textsize = (textsize + PGOFSET) & ~PGOFSET; 605 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 606 607 logical = 0x00200000; /* offset of kernel in RAM */ 608 609 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 610 physical_start + logical, textsize, 611 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 612 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 613 physical_start + logical, totalsize - textsize, 614 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 615 } 616 617 #ifdef VERBOSE_INIT_ARM 618 printf("Constructing L2 page tables\n"); 619 #endif 620 621 /* Map the stack pages */ 622 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 623 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 624 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 625 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 626 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 627 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 628 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 629 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 630 631 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 632 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 633 634 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 635 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 636 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 637 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 638 } 639 640 /* Map the Mini-Data cache clean area. */ 641 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 642 minidataclean.pv_pa); 643 644 /* Map the vector page. */ 645 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 646 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 647 648 /* 649 * Map the IXP425 registers 650 */ 651 pmap_devmap_bootstrap(l1pagetable, ixp425_devmap); 652 653 /* 654 * Give the XScale global cache clean code an appropriately 655 * sized chunk of unmapped VA space starting at 0xff000000 656 * (our device mappings end before this address). 657 */ 658 xscale_cache_clean_addr = 0xff000000U; 659 660 /* 661 * Now we have the real page tables in place so we can switch to them. 662 * Once this is done we will be running with the REAL kernel page 663 * tables. 664 */ 665 666 /* 667 * Update the physical_freestart/physical_freeend/free_pages 668 * variables. 669 */ 670 { 671 extern char _end[]; 672 673 physical_freestart = physical_start + 674 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 675 KERNEL_BASE); 676 physical_freeend = physical_end; 677 free_pages = 678 (physical_freeend - physical_freestart) / PAGE_SIZE; 679 } 680 681 /* Switch tables */ 682 #ifdef VERBOSE_INIT_ARM 683 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 684 physical_freestart, free_pages, free_pages); 685 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 686 #endif 687 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 688 setttb(kernel_l1pt.pv_pa); 689 cpu_tlb_flushID(); 690 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 691 692 /* 693 * Moved from cpu_startup() as data_abort_handler() references 694 * this during uvm init 695 */ 696 proc0paddr = (struct user *)kernelstack.pv_va; 697 lwp0.l_addr = proc0paddr; 698 699 #ifdef VERBOSE_INIT_ARM 700 printf("bootstrap done.\n"); 701 #endif 702 703 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 704 705 /* 706 * Pages were allocated during the secondary bootstrap for the 707 * stacks for different CPU modes. 708 * We must now set the r13 registers in the different CPU modes to 709 * point to these stacks. 710 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 711 * of the stack memory. 712 */ 713 #ifdef VERBOSE_INIT_ARM 714 printf("init subsystems: stacks "); 715 #endif 716 717 set_stackptr(PSR_IRQ32_MODE, 718 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 719 set_stackptr(PSR_ABT32_MODE, 720 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 721 set_stackptr(PSR_UND32_MODE, 722 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 723 724 /* 725 * Well we should set a data abort handler. 726 * Once things get going this will change as we will need a proper 727 * handler. 728 * Until then we will use a handler that just panics but tells us 729 * why. 730 * Initialisation of the vectors will just panic on a data abort. 731 * This just fills in a slightly better one. 732 */ 733 #ifdef VERBOSE_INIT_ARM 734 printf("vectors "); 735 #endif 736 data_abort_handler_address = (u_int)data_abort_handler; 737 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 738 undefined_handler_address = (u_int)undefinedinstruction_bounce; 739 740 /* Initialise the undefined instruction handlers */ 741 #ifdef VERBOSE_INIT_ARM 742 printf("undefined "); 743 #endif 744 undefined_init(); 745 746 /* Load memory into UVM. */ 747 #ifdef VERBOSE_INIT_ARM 748 printf("page "); 749 #endif 750 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 751 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 752 atop(physical_freestart), atop(physical_freeend), 753 VM_FREELIST_DEFAULT); 754 755 /* Boot strap pmap telling it where the kernel page table is */ 756 #ifdef VERBOSE_INIT_ARM 757 printf("pmap "); 758 #endif 759 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 760 KERNEL_VM_BASE + KERNEL_VM_SIZE); 761 762 /* Setup the IRQ system */ 763 #ifdef VERBOSE_INIT_ARM 764 printf("irq "); 765 #endif 766 ixp425_intr_init(); 767 #ifdef VERBOSE_INIT_ARM 768 printf("\nAll initialize done!\nNow Starting NetBSD, Hear we go!\n"); 769 #endif 770 771 #ifdef BOOTHOWTO 772 boothowto = BOOTHOWTO; 773 #endif 774 775 #ifdef IPKDB 776 /* Initialise ipkdb */ 777 ipkdb_init(); 778 if (boothowto & RB_KDB) 779 ipkdb_connect(0); 780 #endif 781 782 #if NKSYMS || defined(DDB) || defined(LKM) 783 /* Firmware doesn't load symbols. */ 784 ksyms_init(0, NULL, NULL); 785 #endif 786 787 #ifdef DDB 788 db_machine_init(); 789 if (boothowto & RB_KDB) 790 Debugger(); 791 #endif 792 793 /* We return the new stack pointer address */ 794 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 795 } 796 797 /* 798 * consinit 799 */ 800 void 801 consinit(void) 802 { 803 static int consinit_called; 804 static const bus_addr_t addrs[2] = { 805 IXP425_UART0_HWBASE, IXP425_UART1_HWBASE 806 }; 807 808 if (consinit_called != 0) 809 return; 810 811 consinit_called = 1; 812 813 pmap_devmap_register(ixp425_devmap); 814 815 if (comcnattach(&ixp425_a4x_bs_tag, addrs[comcnunit], 816 comcnspeed, IXP425_UART_FREQ, COM_TYPE_PXA2x0, comcnmode)) 817 panic("can't init serial console (UART%d)", comcnunit); 818 } 819
Indexes created Sat Oct 11 19:10:01 GMT 2025