ixdp425_machdep.c revision 1.30
1 /* $NetBSD: ixdp425_machdep.c,v 1.30 2012/07/29 00:07:08 matt 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 * 16 * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR 20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 /* 29 * Copyright (c) 1997,1998 Mark Brinicombe. 30 * Copyright (c) 1997,1998 Causality Limited. 31 * All rights reserved. 32 * 33 * Redistribution and use in source and binary forms, with or without 34 * modification, are permitted provided that the following conditions 35 * are met: 36 * 1. Redistributions of source code must retain the above copyright 37 * notice, this list of conditions and the following disclaimer. 38 * 2. Redistributions in binary form must reproduce the above copyright 39 * notice, this list of conditions and the following disclaimer in the 40 * documentation and/or other materials provided with the distribution. 41 * 3. All advertising materials mentioning features or use of this software 42 * must display the following acknowledgement: 43 * This product includes software developed by Mark Brinicombe 44 * for the NetBSD Project. 45 * 4. The name of the company nor the name of the author may be used to 46 * endorse or promote products derived from this software without specific 47 * prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 50 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 51 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 52 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 53 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 54 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 55 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 */ 61 62 /* Machine dependent functions for kernel setup for Intel IXP425 evaluation 63 * boards using RedBoot firmware. 64 */ 65 66 #include <sys/cdefs.h> 67 __KERNEL_RCSID(0, "$NetBSD: ixdp425_machdep.c,v 1.30 2012/07/29 00:07:08 matt Exp $"); 68 69 #include "opt_ddb.h" 70 #include "opt_kgdb.h" 71 #include "opt_pmap_debug.h" 72 73 #include <sys/param.h> 74 #include <sys/device.h> 75 #include <sys/systm.h> 76 #include <sys/kernel.h> 77 #include <sys/exec.h> 78 #include <sys/proc.h> 79 #include <sys/msgbuf.h> 80 #include <sys/reboot.h> 81 #include <sys/termios.h> 82 #include <sys/ksyms.h> 83 84 #include <uvm/uvm_extern.h> 85 86 #include <dev/cons.h> 87 88 #include <machine/db_machdep.h> 89 #include <ddb/db_sym.h> 90 #include <ddb/db_extern.h> 91 92 #include <machine/bootconfig.h> 93 #include <sys/bus.h> 94 #include <machine/cpu.h> 95 #include <machine/frame.h> 96 #include <arm/undefined.h> 97 98 #include <arm/arm32/machdep.h> 99 100 #include <arm/xscale/ixp425reg.h> 101 #include <arm/xscale/ixp425var.h> 102 #include <arm/xscale/ixp425_sipvar.h> 103 104 #include <evbarm/ixdp425/ixdp425reg.h> 105 106 #include "com.h" 107 #if NCOM > 0 108 #include <dev/ic/comreg.h> 109 #include <dev/ic/comvar.h> 110 #endif 111 112 #include "ksyms.h" 113 114 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 115 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 116 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 117 118 /* 119 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 120 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 121 */ 122 #define KERNEL_VM_SIZE 0x0C000000 123 124 125 /* 126 * Address to call from cpu_reset() to reset the machine. 127 * This is machine architecture dependent as it varies depending 128 * on where the ROM appears when you turn the MMU off. 129 */ 130 131 u_int cpu_reset_address = 0x00000000; 132 133 /* Define various stack sizes in pages */ 134 #define IRQ_STACK_SIZE 1 135 #define ABT_STACK_SIZE 1 136 #define UND_STACK_SIZE 1 137 138 BootConfig bootconfig; /* Boot config storage */ 139 char *boot_args = NULL; 140 char *boot_file = NULL; 141 142 vm_offset_t physical_start; 143 vm_offset_t physical_freestart; 144 vm_offset_t physical_freeend; 145 vm_offset_t physical_end; 146 u_int free_pages; 147 148 /* Physical and virtual addresses for some global pages */ 149 pv_addr_t minidataclean; 150 151 vm_offset_t msgbufphys; 152 153 extern int end; 154 155 #ifdef PMAP_DEBUG 156 extern int pmap_debug_level; 157 #endif 158 159 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 160 161 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 162 #define KERNEL_PT_KERNEL_NUM 4 163 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 164 /* L2 tables for mapping kernel VM */ 165 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1) 166 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 167 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 168 169 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 170 171 /* Prototypes */ 172 173 void consinit(void); 174 u_int cpu_get_control(void); 175 176 /* 177 * Define the default console speed for the board. This is generally 178 * what the firmware provided with the board defaults to. 179 */ 180 #ifndef CONSPEED 181 #define CONSPEED B115200 182 #endif /* ! CONSPEED */ 183 184 #ifndef CONUNIT 185 #define CONUNIT 0 186 #endif 187 188 #ifndef CONMODE 189 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */ 190 #endif 191 192 int comcnspeed = CONSPEED; 193 int comcnmode = CONMODE; 194 int comcnunit = CONUNIT; 195 196 #if KGDB 197 #ifndef KGDB_DEVNAME 198 #error Must define KGDB_DEVNAME 199 #endif 200 const char kgdb_devname[] = KGDB_DEVNAME; 201 202 #ifndef KGDB_DEVADDR 203 #error Must define KGDB_DEVADDR 204 #endif 205 unsigned long kgdb_devaddr = KGDB_DEVADDR; 206 207 #ifndef KGDB_DEVRATE 208 #define KGDB_DEVRATE CONSPEED 209 #endif 210 int kgdb_devrate = KGDB_DEVRATE; 211 212 #ifndef KGDB_DEVMODE 213 #define KGDB_DEVMODE CONMODE 214 #endif 215 int kgdb_devmode = KGDB_DEVMODE; 216 #endif /* KGDB */ 217 218 /* 219 * void cpu_reboot(int howto, char *bootstr) 220 * 221 * Reboots the system 222 * 223 * Deal with any syncing, unmounting, dumping and shutdown hooks, 224 * then reset the CPU. 225 */ 226 void 227 cpu_reboot(int howto, char *bootstr) 228 { 229 u_int32_t reg; 230 231 #ifdef DIAGNOSTIC 232 /* info */ 233 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 234 #endif 235 236 /* 237 * If we are still cold then hit the air brakes 238 * and crash to earth fast 239 */ 240 if (cold) { 241 doshutdownhooks(); 242 pmf_system_shutdown(boothowto); 243 printf("The operating system has halted.\n"); 244 printf("Please press any key to reboot.\n\n"); 245 cngetc(); 246 printf("rebooting...\n"); 247 goto reset; 248 } 249 250 /* Disable console buffering */ 251 252 /* 253 * If RB_NOSYNC was not specified sync the discs. 254 * Note: Unless cold is set to 1 here, syslogd will die during the 255 * unmount. It looks like syslogd is getting woken up only to find 256 * that it cannot page part of the binary in as the filesystem has 257 * been unmounted. 258 */ 259 if (!(howto & RB_NOSYNC)) 260 bootsync(); 261 262 /* Say NO to interrupts */ 263 splhigh(); 264 265 /* Do a dump if requested. */ 266 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 267 dumpsys(); 268 269 /* Run any shutdown hooks */ 270 doshutdownhooks(); 271 272 pmf_system_shutdown(boothowto); 273 274 /* Make sure IRQ's are disabled */ 275 IRQdisable; 276 277 if (howto & RB_HALT) { 278 printf("The operating system has halted.\n"); 279 printf("Please press any key to reboot.\n\n"); 280 cngetc(); 281 } 282 283 printf("rebooting...\n\r"); 284 reset: 285 /* 286 * Make really really sure that all interrupts are disabled, 287 */ 288 (void) disable_interrupts(I32_bit|F32_bit); 289 IXPREG(IXP425_INT_ENABLE) = 0; 290 291 /* 292 * Map the boot Flash device down at physical address 0. 293 * This is safe since NetBSD runs out of an alias of 294 * SDRAM at 0x10000000. 295 */ 296 reg = EXP_CSR_READ_4(ixpsip_softc, EXP_CNFG0_OFFSET); 297 reg |= EXP_CNFG0_MEM_MAP; 298 EXP_CSR_WRITE_4(ixpsip_softc, EXP_CNFG0_OFFSET, reg); 299 300 /* 301 * Jump into the bootcode's reset vector 302 * 303 * XXX: 304 * Redboot doesn't like the state in which we leave the PCI 305 * ethernet card, and so fails to detect it on reboot. This 306 * pretty much necessitates a hard reset/power cycle to be 307 * able to download a new kernel image over ethernet. 308 * 309 * I suspect this is due to a bug in Redboot's i82557 driver. 310 */ 311 cpu_reset(); 312 313 /* ...and if that didn't work, just croak. */ 314 printf("RESET FAILED!\n"); 315 for (;;); 316 } 317 318 /* Static device mappings. */ 319 static const struct pmap_devmap ixp425_devmap[] = { 320 /* Physical/Virtual address for I/O space */ 321 { 322 IXP425_IO_VBASE, 323 IXP425_IO_HWBASE, 324 IXP425_IO_SIZE, 325 VM_PROT_READ|VM_PROT_WRITE, 326 PTE_NOCACHE, 327 }, 328 329 /* Expansion Bus */ 330 { 331 IXP425_EXP_VBASE, 332 IXP425_EXP_HWBASE, 333 IXP425_EXP_SIZE, 334 VM_PROT_READ|VM_PROT_WRITE, 335 PTE_NOCACHE, 336 }, 337 338 /* IXP425 PCI Configuration */ 339 { 340 IXP425_PCI_VBASE, 341 IXP425_PCI_HWBASE, 342 IXP425_PCI_SIZE, 343 VM_PROT_READ|VM_PROT_WRITE, 344 PTE_NOCACHE, 345 }, 346 347 /* SDRAM Controller */ 348 { 349 IXP425_MCU_VBASE, 350 IXP425_MCU_HWBASE, 351 IXP425_MCU_SIZE, 352 VM_PROT_READ|VM_PROT_WRITE, 353 PTE_NOCACHE, 354 }, 355 356 /* PCI Memory Space */ 357 { 358 IXP425_PCI_MEM_VBASE, 359 IXP425_PCI_MEM_HWBASE, 360 IXP425_PCI_MEM_SIZE, 361 VM_PROT_READ|VM_PROT_WRITE, 362 PTE_NOCACHE, 363 }, 364 365 { 366 0, 367 0, 368 0, 369 0, 370 0, 371 } 372 }; 373 374 /* 375 * u_int initarm(...) 376 * 377 * Initial entry point on startup. This gets called before main() is 378 * entered. 379 * It should be responsible for setting up everything that must be 380 * in place when main is called. 381 * This includes 382 * Taking a copy of the boot configuration structure. 383 * Initialising the physical console so characters can be printed. 384 * Setting up page tables for the kernel 385 * Relocating the kernel to the bottom of physical memory 386 */ 387 u_int 388 initarm(void *arg) 389 { 390 extern vaddr_t xscale_cache_clean_addr; 391 #ifdef DIAGNOSTIC 392 extern vsize_t xscale_minidata_clean_size; 393 #endif 394 int loop; 395 int loop1; 396 u_int kerneldatasize; 397 u_int l1pagetable; 398 u_int freemempos; 399 400 /* 401 * Since we map v0xf0000000 == p0xc8000000, it's possible for 402 * us to initialize the console now. 403 */ 404 consinit(); 405 406 #ifdef VERBOSE_INIT_ARM 407 /* Talk to the user */ 408 printf("\nNetBSD/evbarm (Intel IXDP425) booting ...\n"); 409 #endif 410 411 /* 412 * Heads up ... Setup the CPU / MMU / TLB functions 413 */ 414 if (set_cpufuncs()) 415 panic("cpu not recognized!"); 416 417 /* XXX overwrite bootconfig to hardcoded values */ 418 bootconfig.dramblocks = 1; 419 bootconfig.dram[0].address = 0x10000000; 420 bootconfig.dram[0].pages = ixp425_sdram_size() / PAGE_SIZE; 421 422 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 423 424 #ifdef VERBOSE_INIT_ARM 425 printf("kernsize=0x%x\n", kerneldatasize); 426 #endif 427 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 428 429 /* 430 * Set up the variables that define the availablilty of 431 * physical memory. For now, we're going to set 432 * physical_freestart to 0x10200000 (where the kernel 433 * was loaded), and allocate the memory we need downwards. 434 * If we get too close to the L1 table that we set up, we 435 * will panic. We will update physical_freestart and 436 * physical_freeend later to reflect what pmap_bootstrap() 437 * wants to see. 438 * 439 * XXX pmap_bootstrap() needs an enema. 440 */ 441 physical_start = bootconfig.dram[0].address; 442 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 443 444 physical_freestart = physical_start 445 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 446 physical_freeend = physical_end; 447 448 physmem = (physical_end - physical_start) / PAGE_SIZE; 449 450 /* Tell the user about the memory */ 451 #ifdef VERBOSE_INIT_ARM 452 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 453 physical_start, physical_end - 1); 454 455 printf("Allocating page tables\n"); 456 #endif 457 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 458 459 freemempos = 0x10000000; 460 461 #ifdef VERBOSE_INIT_ARM 462 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 463 physical_start, physical_end); 464 #endif 465 466 /* Define a macro to simplify memory allocation */ 467 #define valloc_pages(var, np) \ 468 alloc_pages((var).pv_pa, (np)); \ 469 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 470 471 #if 0 472 #define alloc_pages(var, np) \ 473 physical_freeend -= ((np) * PAGE_SIZE); \ 474 if (physical_freeend < physical_freestart) \ 475 panic("initarm: out of memory"); \ 476 (var) = physical_freeend; \ 477 free_pages -= (np); \ 478 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 479 #else 480 #define alloc_pages(var, np) \ 481 (var) = freemempos; \ 482 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 483 freemempos += (np) * PAGE_SIZE; 484 #endif 485 486 loop1 = 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. 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 cpu_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 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 674 675 #ifdef VERBOSE_INIT_ARM 676 printf("bootstrap done.\n"); 677 #endif 678 679 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 680 681 /* 682 * Pages were allocated during the secondary bootstrap for the 683 * stacks for different CPU modes. 684 * We must now set the r13 registers in the different CPU modes to 685 * point to these stacks. 686 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 687 * of the stack memory. 688 */ 689 #ifdef VERBOSE_INIT_ARM 690 printf("init subsystems: stacks "); 691 #endif 692 693 set_stackptr(PSR_IRQ32_MODE, 694 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 695 set_stackptr(PSR_ABT32_MODE, 696 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 697 set_stackptr(PSR_UND32_MODE, 698 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 699 700 /* 701 * Well we should set a data abort handler. 702 * Once things get going this will change as we will need a proper 703 * handler. 704 * Until then we will use a handler that just panics but tells us 705 * why. 706 * Initialisation of the vectors will just panic on a data abort. 707 * This just fills in a slightly better one. 708 */ 709 #ifdef VERBOSE_INIT_ARM 710 printf("vectors "); 711 #endif 712 data_abort_handler_address = (u_int)data_abort_handler; 713 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 714 undefined_handler_address = (u_int)undefinedinstruction_bounce; 715 716 /* Initialise the undefined instruction handlers */ 717 #ifdef VERBOSE_INIT_ARM 718 printf("undefined "); 719 #endif 720 undefined_init(); 721 722 /* Load memory into UVM. */ 723 #ifdef VERBOSE_INIT_ARM 724 printf("page "); 725 #endif 726 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 727 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 728 atop(physical_freestart), atop(physical_freeend), 729 VM_FREELIST_DEFAULT); 730 731 /* Boot strap pmap telling it where the kernel page table is */ 732 #ifdef VERBOSE_INIT_ARM 733 printf("pmap "); 734 #endif 735 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 736 737 /* Setup the IRQ system */ 738 #ifdef VERBOSE_INIT_ARM 739 printf("irq "); 740 #endif 741 ixp425_intr_init(); 742 #ifdef VERBOSE_INIT_ARM 743 printf("\nAll initialize done!\nNow Starting NetBSD, Hear we go!\n"); 744 #endif 745 746 #ifdef BOOTHOWTO 747 boothowto = BOOTHOWTO; 748 #endif 749 750 #ifdef DDB 751 db_machine_init(); 752 if (boothowto & RB_KDB) 753 Debugger(); 754 #endif 755 756 /* We return the new stack pointer address */ 757 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 758 } 759 760 /* 761 * consinit 762 */ 763 void 764 consinit(void) 765 { 766 static int consinit_called; 767 static const bus_addr_t addrs[2] = { 768 IXP425_UART0_HWBASE, IXP425_UART1_HWBASE 769 }; 770 771 if (consinit_called != 0) 772 return; 773 774 consinit_called = 1; 775 776 pmap_devmap_register(ixp425_devmap); 777 778 if (comcnattach(&ixp425_a4x_bs_tag, addrs[comcnunit], 779 comcnspeed, IXP425_UART_FREQ, COM_TYPE_PXA2x0, comcnmode)) 780 panic("can't init serial console (UART%d)", comcnunit); 781 } 782
Indexes created Tue Oct 14 06:10:07 GMT 2025