ixdp425_machdep.c revision 1.12
1 /* $NetBSD: ixdp425_machdep.c,v 1.12 2003/12/08 14:44:03 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 1.12 2003/12/08 14:44:03 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 <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 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 510 /* Are we 16KB aligned for an L1 ? */ 511 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 512 && kernel_l1pt.pv_pa == 0) { 513 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 514 } else { 515 valloc_pages(kernel_pt_table[loop1], 516 L2_TABLE_SIZE / PAGE_SIZE); 517 ++loop1; 518 } 519 } 520 521 /* This should never be able to happen but better confirm that. */ 522 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 523 panic("initarm: Failed to align the kernel page directory"); 524 525 /* 526 * Allocate a page for the system page. 527 * This page will just contain the system vectors and can be 528 * shared by all processes. 529 */ 530 alloc_pages(systempage.pv_pa, 1); 531 532 /* Allocate stacks for all modes */ 533 valloc_pages(irqstack, IRQ_STACK_SIZE); 534 valloc_pages(abtstack, ABT_STACK_SIZE); 535 valloc_pages(undstack, UND_STACK_SIZE); 536 valloc_pages(kernelstack, UPAGES); 537 538 /* Allocate enough pages for cleaning the Mini-Data cache. */ 539 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 540 valloc_pages(minidataclean, 1); 541 542 #ifdef VERBOSE_INIT_ARM 543 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 544 irqstack.pv_va); 545 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 546 abtstack.pv_va); 547 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 548 undstack.pv_va); 549 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 550 kernelstack.pv_va); 551 #endif 552 553 /* 554 * XXX Defer this to later so that we can reclaim the memory 555 * XXX used by the RedBoot page tables. 556 */ 557 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 558 559 /* 560 * Ok we have allocated physical pages for the primary kernel 561 * page tables 562 */ 563 564 #ifdef VERBOSE_INIT_ARM 565 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 566 #endif 567 568 /* 569 * Now we start construction of the L1 page table 570 * We start by mapping the L2 page tables into the L1. 571 * This means that we can replace L1 mappings later on if necessary 572 */ 573 l1pagetable = kernel_l1pt.pv_pa; 574 575 /* Map the L2 pages tables in the L1 page table */ 576 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 577 &kernel_pt_table[KERNEL_PT_SYS]); 578 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 579 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 580 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 581 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 582 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 583 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 584 585 /* update the top of the kernel VM */ 586 pmap_curmaxkvaddr = 587 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 588 589 pmap_link_l2pt(l1pagetable, IXP425_IO_VBASE, 590 &kernel_pt_table[KERNEL_PT_IO]); 591 592 #ifdef VERBOSE_INIT_ARM 593 printf("Mapping kernel\n"); 594 #endif 595 596 /* Now we fill in the L2 pagetable for the kernel static code/data */ 597 { 598 extern char etext[], _end[]; 599 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 600 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 601 u_int logical; 602 603 textsize = (textsize + PGOFSET) & ~PGOFSET; 604 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 605 606 logical = 0x00200000; /* offset of kernel in RAM */ 607 608 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 609 physical_start + logical, textsize, 610 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 611 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 612 physical_start + logical, totalsize - textsize, 613 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 614 } 615 616 #ifdef VERBOSE_INIT_ARM 617 printf("Constructing L2 page tables\n"); 618 #endif 619 620 /* Map the stack pages */ 621 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 622 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 623 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 624 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 625 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 626 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 627 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 628 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 629 630 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 631 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 632 633 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 634 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 635 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 636 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 637 } 638 639 /* Map the Mini-Data cache clean area. */ 640 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 641 minidataclean.pv_pa); 642 643 /* Map the vector page. */ 644 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 645 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 646 647 /* 648 * Map the IXP425 registers 649 */ 650 pmap_devmap_bootstrap(l1pagetable, ixp425_devmap); 651 652 /* 653 * Give the XScale global cache clean code an appropriately 654 * sized chunk of unmapped VA space starting at 0xff000000 655 * (our device mappings end before this address). 656 */ 657 xscale_cache_clean_addr = 0xff000000U; 658 659 /* 660 * Now we have the real page tables in place so we can switch to them. 661 * Once this is done we will be running with the REAL kernel page 662 * tables. 663 */ 664 665 /* 666 * Update the physical_freestart/physical_freeend/free_pages 667 * variables. 668 */ 669 { 670 extern char _end[]; 671 672 physical_freestart = physical_start + 673 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 674 KERNEL_BASE); 675 physical_freeend = physical_end; 676 free_pages = 677 (physical_freeend - physical_freestart) / PAGE_SIZE; 678 } 679 680 /* Switch tables */ 681 #ifdef VERBOSE_INIT_ARM 682 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 683 physical_freestart, free_pages, free_pages); 684 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 685 #endif 686 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 687 setttb(kernel_l1pt.pv_pa); 688 cpu_tlb_flushID(); 689 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 690 691 /* 692 * Moved from cpu_startup() as data_abort_handler() references 693 * this during uvm init 694 */ 695 proc0paddr = (struct user *)kernelstack.pv_va; 696 lwp0.l_addr = proc0paddr; 697 698 #ifdef VERBOSE_INIT_ARM 699 printf("bootstrap done.\n"); 700 #endif 701 702 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 703 704 /* 705 * Pages were allocated during the secondary bootstrap for the 706 * stacks for different CPU modes. 707 * We must now set the r13 registers in the different CPU modes to 708 * point to these stacks. 709 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 710 * of the stack memory. 711 */ 712 #ifdef VERBOSE_INIT_ARM 713 printf("init subsystems: stacks "); 714 #endif 715 716 set_stackptr(PSR_IRQ32_MODE, 717 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 718 set_stackptr(PSR_ABT32_MODE, 719 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 720 set_stackptr(PSR_UND32_MODE, 721 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 722 723 /* 724 * Well we should set a data abort handler. 725 * Once things get going this will change as we will need a proper 726 * handler. 727 * Until then we will use a handler that just panics but tells us 728 * why. 729 * Initialisation of the vectors will just panic on a data abort. 730 * This just fills in a slighly better one. 731 */ 732 #ifdef VERBOSE_INIT_ARM 733 printf("vectors "); 734 #endif 735 data_abort_handler_address = (u_int)data_abort_handler; 736 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 737 undefined_handler_address = (u_int)undefinedinstruction_bounce; 738 739 /* Initialise the undefined instruction handlers */ 740 #ifdef VERBOSE_INIT_ARM 741 printf("undefined "); 742 #endif 743 undefined_init(); 744 745 /* Load memory into UVM. */ 746 #ifdef VERBOSE_INIT_ARM 747 printf("page "); 748 #endif 749 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 750 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 751 atop(physical_freestart), atop(physical_freeend), 752 VM_FREELIST_DEFAULT); 753 754 /* Boot strap pmap telling it where the kernel page table is */ 755 #ifdef VERBOSE_INIT_ARM 756 printf("pmap "); 757 #endif 758 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 759 KERNEL_VM_BASE + KERNEL_VM_SIZE); 760 761 /* Setup the IRQ system */ 762 #ifdef VERBOSE_INIT_ARM 763 printf("irq "); 764 #endif 765 ixp425_intr_init(); 766 #ifdef VERBOSE_INIT_ARM 767 printf("\nAll initialize done!\nNow Starting NetBSD, Hear we go!\n"); 768 #endif 769 770 #ifdef BOOTHOWTO 771 boothowto = BOOTHOWTO; 772 #endif 773 774 #ifdef IPKDB 775 /* Initialise ipkdb */ 776 ipkdb_init(); 777 if (boothowto & RB_KDB) 778 ipkdb_connect(0); 779 #endif 780 781 #if NKSYMS || defined(DDB) || defined(LKM) 782 /* Firmware doesn't load symbols. */ 783 ksyms_init(0, NULL, NULL); 784 #endif 785 786 #ifdef DDB 787 db_machine_init(); 788 if (boothowto & RB_KDB) 789 Debugger(); 790 #endif 791 792 /* We return the new stack pointer address */ 793 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 794 } 795 796 /* 797 * consinit 798 */ 799 void 800 consinit(void) 801 { 802 static int consinit_called; 803 static const bus_addr_t addrs[2] = { 804 IXP425_UART0_HWBASE, IXP425_UART1_HWBASE 805 }; 806 807 if (consinit_called != 0) 808 return; 809 810 consinit_called = 1; 811 812 pmap_devmap_register(ixp425_devmap); 813 814 if (comcnattach(&ixp425_a4x_bs_tag, addrs[comcnunit], 815 comcnspeed, IXP425_UART_FREQ, COM_TYPE_PXA2x0, comcnmode)) 816 panic("can't init serial console (UART%d)", comcnunit); 817 } 818
Indexes created Sat Oct 11 19:10:01 GMT 2025