1/* $NetBSD: npwr_fc_machdep.c,v 1.15 2011/06/30 20:09:27 wiz Exp $ */ 2 3/* 4 * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe and Steve C. Woodford for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38/* 39 * Copyright (c) 1997,1998 Mark Brinicombe. 40 * Copyright (c) 1997,1998 Causality Limited. 41 * All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by Mark Brinicombe 54 * for the NetBSD Project. 55 * 4. The name of the company nor the name of the author may be used to 56 * endorse or promote products derived from this software without specific 57 * prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 60 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 61 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 62 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 63 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 64 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 65 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 * 71 * Machine dependent functions for kernel setup for Intel IQ80321 evaluation 72 * boards using RedBoot firmware. 73 */ 74 75#include <sys/cdefs.h> 76__KERNEL_RCSID(0, "$NetBSD: npwr_fc_machdep.c,v 1.15 2011/06/30 20:09:27 wiz Exp $"); 77 78#include "opt_ddb.h" 79#include "opt_kgdb.h" 80#include "opt_pmap_debug.h" 81 82#include <sys/param.h> 83#include <sys/device.h> 84#include <sys/systm.h> 85#include <sys/kernel.h> 86#include <sys/exec.h> 87#include <sys/proc.h> 88#include <sys/msgbuf.h> 89#include <sys/reboot.h> 90#include <sys/termios.h> 91#include <sys/ksyms.h> 92 93#include <uvm/uvm_extern.h> 94 95#include <dev/cons.h> 96 97#include <machine/db_machdep.h> 98#include <ddb/db_sym.h> 99#include <ddb/db_extern.h> 100 101#include <machine/bootconfig.h> 102#include <sys/bus.h> 103#include <machine/cpu.h> 104#include <machine/frame.h> 105#include <arm/undefined.h> 106 107#include <arm/arm32/machdep.h> 108 109#include <arm/xscale/i80321reg.h> 110#include <arm/xscale/i80321var.h> 111 112#include <dev/pci/ppbreg.h> 113 114#include <evbarm/iq80321/iq80321reg.h> 115#include <evbarm/iq80321/iq80321var.h> 116#include <evbarm/iq80321/obiovar.h> 117 118#include "ksyms.h" 119 120/* Kernel text starts 2MB in from the bottom of the kernel address space. */ 121#define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 122#define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 123 124/* 125 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 126 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 127 */ 128#define KERNEL_VM_SIZE 0x0C000000 129 130/* 131 * Address to call from cpu_reset() to reset the machine. 132 * This is machine architecture dependent as it varies depending 133 * on where the ROM appears when you turn the MMU off. 134 * 135 * XXX Not actally used on IQ80321 -- clean up the generic 136 * ARM code. 137 */ 138 139u_int cpu_reset_address = 0x00000000; 140 141/* Define various stack sizes in pages */ 142#define IRQ_STACK_SIZE 1 143#define ABT_STACK_SIZE 1 144#define UND_STACK_SIZE 1 145 146BootConfig bootconfig; /* Boot config storage */ 147char *boot_args = NULL; 148char *boot_file = NULL; 149 150vm_offset_t physical_start; 151vm_offset_t physical_freestart; 152vm_offset_t physical_freeend; 153vm_offset_t physical_end; 154u_int free_pages; 155 156/*int debug_flags;*/ 157#ifndef PMAP_STATIC_L1S 158int max_processes = 64; /* Default number */ 159#endif /* !PMAP_STATIC_L1S */ 160 161/* Physical and virtual addresses for some global pages */ 162pv_addr_t irqstack; 163pv_addr_t undstack; 164pv_addr_t abtstack; 165pv_addr_t kernelstack; 166pv_addr_t minidataclean; 167 168vm_offset_t msgbufphys; 169 170extern u_int data_abort_handler_address; 171extern u_int prefetch_abort_handler_address; 172extern u_int undefined_handler_address; 173 174#ifdef PMAP_DEBUG 175extern int pmap_debug_level; 176#endif 177 178#define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 179 180#define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 181#define KERNEL_PT_KERNEL_NUM 4 182 183 /* L2 table for mapping i80321 */ 184#define KERNEL_PT_IOPXS (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 185 186 /* L2 tables for mapping kernel VM */ 187#define KERNEL_PT_VMDATA (KERNEL_PT_IOPXS + 1) 188#define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 189#define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 190 191pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 192 193/* Prototypes */ 194 195void consinit(void); 196 197#include "com.h" 198#if NCOM > 0 199#include <dev/ic/comreg.h> 200#include <dev/ic/comvar.h> 201#endif 202 203/* 204 * Define the default console speed for the board. This is generally 205 * what the firmware provided with the board defaults to. 206 */ 207#ifndef CONSPEED 208#define CONSPEED B115200 209#endif /* ! CONSPEED */ 210 211#ifndef CONUNIT 212#define CONUNIT 0 213#endif 214 215#ifndef CONMODE 216#define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 217#endif 218 219int comcnspeed = CONSPEED; 220int comcnmode = CONMODE; 221int comcnunit = CONUNIT; 222 223#if KGDB 224#ifndef KGDB_DEVNAME 225#error Must define KGDB_DEVNAME 226#endif 227const char kgdb_devname[] = KGDB_DEVNAME; 228 229#ifndef KGDB_DEVADDR 230#error Must define KGDB_DEVADDR 231#endif 232unsigned long kgdb_devaddr = KGDB_DEVADDR; 233 234#ifndef KGDB_DEVRATE 235#define KGDB_DEVRATE CONSPEED 236#endif 237int kgdb_devrate = KGDB_DEVRATE; 238 239#ifndef KGDB_DEVMODE 240#define KGDB_DEVMODE CONMODE 241#endif 242int kgdb_devmode = KGDB_DEVMODE; 243#endif /* KGDB */ 244 245/* 246 * void cpu_reboot(int howto, char *bootstr) 247 * 248 * Reboots the system 249 * 250 * Deal with any syncing, unmounting, dumping and shutdown hooks, 251 * then reset the CPU. 252 */ 253void 254cpu_reboot(int howto, char *bootstr) 255{ 256 257 /* 258 * If we are still cold then hit the air brakes 259 * and crash to earth fast 260 */ 261 if (cold) { 262 doshutdownhooks(); 263 pmf_system_shutdown(boothowto); 264 printf("The operating system has halted.\n"); 265 printf("Please press any key to reboot.\n\n"); 266 cngetc(); 267 printf("rebooting...\n"); 268 goto reset; 269 } 270 271 /* Disable console buffering */ 272 273 /* 274 * If RB_NOSYNC was not specified sync the discs. 275 * Note: Unless cold is set to 1 here, syslogd will die during the 276 * unmount. It looks like syslogd is getting woken up only to find 277 * that it cannot page part of the binary in as the filesystem has 278 * been unmounted. 279 */ 280 if (!(howto & RB_NOSYNC)) 281 bootsync(); 282 283 /* Say NO to interrupts */ 284 splhigh(); 285 286 /* Do a dump if requested. */ 287 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 288 dumpsys(); 289 290 /* Run any shutdown hooks */ 291 doshutdownhooks(); 292 293 pmf_system_shutdown(boothowto); 294 295 /* Make sure IRQ's are disabled */ 296 IRQdisable; 297 298 if (howto & RB_HALT) { 299 printf("The operating system has halted.\n"); 300 printf("Please press any key to reboot.\n\n"); 301 cngetc(); 302 } 303 304 printf("rebooting...\n\r"); 305 reset: 306 /* 307 * Make really really sure that all interrupts are disabled, 308 * and poke the Internal Bus and Peripheral Bus reset lines. 309 */ 310 (void) disable_interrupts(I32_bit|F32_bit); 311 *(volatile uint32_t *)(IQ80321_80321_VBASE + VERDE_ATU_BASE + 312 ATU_PCSR) = PCSR_RIB | PCSR_RPB; 313 314 /* ...and if that didn't work, just croak. */ 315 printf("RESET FAILED!\n"); 316 for (;;); 317} 318 319/* Static device mappings. */ 320static const struct pmap_devmap iq80321_devmap[] = { 321 /* 322 * Map the on-board devices VA == PA so that we can access them 323 * with the MMU on or off. 324 */ 325 { 326 IQ80321_OBIO_BASE, 327 IQ80321_OBIO_BASE, 328 IQ80321_OBIO_SIZE, 329 VM_PROT_READ|VM_PROT_WRITE, 330 PTE_NOCACHE, 331 }, 332 333 { 334 IQ80321_IOW_VBASE, 335 VERDE_OUT_XLATE_IO_WIN0_BASE, 336 VERDE_OUT_XLATE_IO_WIN_SIZE, 337 VM_PROT_READ|VM_PROT_WRITE, 338 PTE_NOCACHE, 339 }, 340 341 { 342 IQ80321_80321_VBASE, 343 VERDE_PMMR_BASE, 344 VERDE_PMMR_SIZE, 345 VM_PROT_READ|VM_PROT_WRITE, 346 PTE_NOCACHE, 347 }, 348 349 { 350 0, 351 0, 352 0, 353 0, 354 0, 355 } 356}; 357 358/* 359 * u_int initarm(...) 360 * 361 * Initial entry point on startup. This gets called before main() is 362 * entered. 363 * It should be responsible for setting up everything that must be 364 * in place when main is called. 365 * This includes 366 * Taking a copy of the boot configuration structure. 367 * Initialising the physical console so characters can be printed. 368 * Setting up page tables for the kernel 369 * Relocating the kernel to the bottom of physical memory 370 */ 371u_int 372initarm(void *arg) 373{ 374 extern vaddr_t xscale_cache_clean_addr; 375#ifdef DIAGNOSTIC 376 extern vsize_t xscale_minidata_clean_size; 377#endif 378 int loop; 379 int loop1; 380 u_int l1pagetable; 381 paddr_t memstart; 382 psize_t memsize; 383 384 /* Calibrate the delay loop. */ 385 i80321_calibrate_delay(); 386 i80321_hardclock_hook = NULL; 387 388 /* 389 * Since we map the on-board devices VA==PA, and the kernel 390 * is running VA==PA, it's possible for us to initialize 391 * the console now. 392 */ 393 consinit(); 394 395#ifdef VERBOSE_INIT_ARM 396 /* Talk to the user */ 397 printf("\nNetBSD/evbarm (NPWR_FC) booting ...\n"); 398#endif 399 400 /* 401 * Heads up ... Setup the CPU / MMU / TLB functions 402 */ 403 if (set_cpufuncs()) 404 panic("cpu not recognized!"); 405 406 /* 407 * We are currently running with the MMU enabled and the 408 * entire address space mapped VA==PA, except for the 409 * first 64M of RAM is also double-mapped at 0xc0000000. 410 * There is an L1 page table at 0xa0004000. 411 */ 412 413 /* 414 * Fetch the SDRAM start/size from the i80321 SDRAM configration 415 * registers. 416 */ 417 i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE, 418 &memstart, &memsize); 419 420#ifdef VERBOSE_INIT_ARM 421 printf("initarm: Configuring system ...\n"); 422#endif 423 424 /* Fake bootconfig structure for the benefit of pmap.c */ 425 /* XXX must make the memory description h/w independent */ 426 bootconfig.dramblocks = 1; 427 bootconfig.dram[0].address = memstart; 428 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 429 430 /* 431 * Set up the variables that define the availablilty of 432 * physical memory. For now, we're going to set 433 * physical_freestart to 0xa0200000 (where the kernel 434 * was loaded), and allocate the memory we need downwards. 435 * If we get too close to the L1 table that we set up, we 436 * will panic. We will update physical_freestart and 437 * physical_freeend later to reflect what pmap_bootstrap() 438 * wants to see. 439 * 440 * XXX pmap_bootstrap() needs an enema. 441 */ 442 physical_start = bootconfig.dram[0].address; 443 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 444 445 physical_freestart = 0xa0009000UL; 446 physical_freeend = 0xa0200000UL; 447 448 physmem = (physical_end - physical_start) / PAGE_SIZE; 449 450#ifdef VERBOSE_INIT_ARM 451 /* Tell the user about the memory */ 452 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 453 physical_start, physical_end - 1); 454#endif 455 456 /* 457 * Okay, the kernel starts 2MB in from the bottom of physical 458 * memory. We are going to allocate our bootstrap pages downwards 459 * from there. 460 * 461 * We need to allocate some fixed page tables to get the kernel 462 * going. We allocate one page directory and a number of page 463 * tables and store the physical addresses in the kernel_pt_table 464 * array. 465 * 466 * The kernel page directory must be on a 16K boundary. The page 467 * tables must be on 4K bounaries. What we do is allocate the 468 * page directory on the first 16K boundary that we encounter, and 469 * the page tables on 4K boundaries otherwise. Since we allocate 470 * at least 3 L2 page tables, we are guaranteed to encounter at 471 * least one 16K aligned region. 472 */ 473 474#ifdef VERBOSE_INIT_ARM 475 printf("Allocating page tables\n"); 476#endif 477 478 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 479 480#ifdef VERBOSE_INIT_ARM 481 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 482 physical_freestart, free_pages, free_pages); 483#endif 484 485 /* Define a macro to simplify memory allocation */ 486#define valloc_pages(var, np) \ 487 alloc_pages((var).pv_pa, (np)); \ 488 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 489 490#define alloc_pages(var, np) \ 491 physical_freeend -= ((np) * PAGE_SIZE); \ 492 if (physical_freeend < physical_freestart) \ 493 panic("initarm: out of memory"); \ 494 (var) = physical_freeend; \ 495 free_pages -= (np); \ 496 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 497 498 loop1 = 0; 499 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 500 /* Are we 16KB aligned for an L1 ? */ 501 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 502 && kernel_l1pt.pv_pa == 0) { 503 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 504 } else { 505 valloc_pages(kernel_pt_table[loop1], 506 L2_TABLE_SIZE / PAGE_SIZE); 507 ++loop1; 508 } 509 } 510 511 /* This should never be able to happen but better confirm that. */ 512 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 513 panic("initarm: Failed to align the kernel page directory"); 514 515 /* 516 * Allocate a page for the system page mapped to V0x00000000 517 * This page will just contain the system vectors and can be 518 * shared by all processes. 519 */ 520 alloc_pages(systempage.pv_pa, 1); 521 522 /* Allocate stacks for all modes */ 523 valloc_pages(irqstack, IRQ_STACK_SIZE); 524 valloc_pages(abtstack, ABT_STACK_SIZE); 525 valloc_pages(undstack, UND_STACK_SIZE); 526 valloc_pages(kernelstack, UPAGES); 527 528 /* Allocate enough pages for cleaning the Mini-Data cache. */ 529 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 530 valloc_pages(minidataclean, 1); 531 532#ifdef VERBOSE_INIT_ARM 533 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 534 irqstack.pv_va); 535 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 536 abtstack.pv_va); 537 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 538 undstack.pv_va); 539 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 540 kernelstack.pv_va); 541#endif 542 543 /* 544 * XXX Defer this to later so that we can reclaim the memory 545 * XXX used by the RedBoot page tables. 546 */ 547 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 548 549 /* 550 * Ok we have allocated physical pages for the primary kernel 551 * page tables 552 */ 553 554#ifdef VERBOSE_INIT_ARM 555 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 556#endif 557 558 /* 559 * Now we start construction of the L1 page table 560 * We start by mapping the L2 page tables into the L1. 561 * This means that we can replace L1 mappings later on if necessary 562 */ 563 l1pagetable = kernel_l1pt.pv_pa; 564 565 /* Map the L2 pages tables in the L1 page table */ 566 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 567 &kernel_pt_table[KERNEL_PT_SYS]); 568 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 569 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 570 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 571 pmap_link_l2pt(l1pagetable, IQ80321_IOPXS_VBASE, 572 &kernel_pt_table[KERNEL_PT_IOPXS]); 573 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 574 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 575 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 576 577 /* update the top of the kernel VM */ 578 pmap_curmaxkvaddr = 579 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 580 581#ifdef VERBOSE_INIT_ARM 582 printf("Mapping kernel\n"); 583#endif 584 585 /* Now we fill in the L2 pagetable for the kernel static code/data */ 586 { 587 extern char etext[], _end[]; 588 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 589 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 590 u_int logical; 591 592 textsize = (textsize + PGOFSET) & ~PGOFSET; 593 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 594 595 logical = 0x00200000; /* offset of kernel in RAM */ 596 597 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 598 physical_start + logical, textsize, 599 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 600 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 601 physical_start + logical, totalsize - textsize, 602 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 603 } 604 605#ifdef VERBOSE_INIT_ARM 606 printf("Constructing L2 page tables\n"); 607#endif 608 609 /* Map the stack pages */ 610 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 611 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 612 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 613 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 614 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 615 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 616 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 617 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 618 619 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 620 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 621 622 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 623 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 624 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 625 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 626 } 627 628 /* Map the Mini-Data cache clean area. */ 629 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 630 minidataclean.pv_pa); 631 632 /* Map the vector page. */ 633 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 634 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 635 636 /* Map the statically mapped devices. */ 637 pmap_devmap_bootstrap(l1pagetable, iq80321_devmap); 638 639 /* 640 * Give the XScale global cache clean code an appropriately 641 * sized chunk of unmapped VA space starting at 0xff000000 642 * (our device mappings end before this address). 643 */ 644 xscale_cache_clean_addr = 0xff000000U; 645 646 /* 647 * Now we have the real page tables in place so we can switch to them. 648 * Once this is done we will be running with the REAL kernel page 649 * tables. 650 */ 651 652 /* 653 * Update the physical_freestart/physical_freeend/free_pages 654 * variables. 655 */ 656 { 657 extern char _end[]; 658 659 physical_freestart = physical_start + 660 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 661 KERNEL_BASE); 662 physical_freeend = physical_end; 663 free_pages = 664 (physical_freeend - physical_freestart) / PAGE_SIZE; 665 } 666 667 /* Switch tables */ 668#ifdef VERBOSE_INIT_ARM 669 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 670 physical_freestart, free_pages, free_pages); 671 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 672#endif 673 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 674 cpu_setttb(kernel_l1pt.pv_pa); 675 cpu_tlb_flushID(); 676 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 677 678 /* 679 * Moved from cpu_startup() as data_abort_handler() references 680 * this during uvm init 681 */ 682 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 683 684#ifdef VERBOSE_INIT_ARM 685 printf("done!\n"); 686#endif 687 688#ifdef VERBOSE_INIT_ARM 689 printf("bootstrap done.\n"); 690#endif 691 692 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 693 694 /* 695 * Pages were allocated during the secondary bootstrap for the 696 * stacks for different CPU modes. 697 * We must now set the r13 registers in the different CPU modes to 698 * point to these stacks. 699 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 700 * of the stack memory. 701 */ 702#ifdef VERBOSE_INIT_ARM 703 printf("init subsystems: stacks "); 704#endif 705 706 set_stackptr(PSR_IRQ32_MODE, 707 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 708 set_stackptr(PSR_ABT32_MODE, 709 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 710 set_stackptr(PSR_UND32_MODE, 711 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 712 713 /* 714 * Well we should set a data abort handler. 715 * Once things get going this will change as we will need a proper 716 * handler. 717 * Until then we will use a handler that just panics but tells us 718 * why. 719 * Initialisation of the vectors will just panic on a data abort. 720 * This just fills in a slighly better one. 721 */ 722#ifdef VERBOSE_INIT_ARM 723 printf("vectors "); 724#endif 725 data_abort_handler_address = (u_int)data_abort_handler; 726 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 727 undefined_handler_address = (u_int)undefinedinstruction_bounce; 728 729 /* Initialise the undefined instruction handlers */ 730#ifdef VERBOSE_INIT_ARM 731 printf("undefined "); 732#endif 733 undefined_init(); 734 735 /* Load memory into UVM. */ 736#ifdef VERBOSE_INIT_ARM 737 printf("page "); 738#endif 739 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 740 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 741 atop(physical_freestart), atop(physical_freeend), 742 VM_FREELIST_DEFAULT); 743 744 /* Boot strap pmap telling it where the kernel page table is */ 745#ifdef VERBOSE_INIT_ARM 746 printf("pmap "); 747#endif 748 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 749 750 /* Setup the IRQ system */ 751#ifdef VERBOSE_INIT_ARM 752 printf("irq "); 753#endif 754 i80321_intr_init(); 755 756#ifdef VERBOSE_INIT_ARM 757 printf("done.\n"); 758#endif 759 760#ifdef BOOTHOWTO 761 boothowto = BOOTHOWTO; 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 774void 775consinit(void) 776{ 777 static const bus_addr_t comcnaddrs[] = { 778 IQ80321_UART1, /* com0 */ 779 }; 780 static int consinit_called; 781 782 if (consinit_called != 0) 783 return; 784 785 consinit_called = 1; 786 787 /* 788 * Console devices are mapped VA==PA. Our devmap reflects 789 * this, so register it now so drivers can map the console 790 * device. 791 */ 792 pmap_devmap_register(iq80321_devmap); 793 794#if NCOM > 0 795 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 796 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 797 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 798#else 799 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 800#endif 801#if KGDB 802#if NCOM > 0 803 if (strcmp(kgdb_devname, "com") == 0) { 804 com_kgdb_attach(&obio_bs_tag, kgdb_devaddr, kgdb_devrate, 805 COM_FREQ, COM_TYPE_NORMAL, kgdb_devmode); 806 } 807#endif /* NCOM > 0 */ 808#endif /* KGDB */ 809} 810