1 /* $NetBSD: iq80321_machdep.c,v 1.48 2009/12/26 16:01:24 uebayasi 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 dependant 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: iq80321_machdep.c,v 1.48 2009/12/26 16:01:24 uebayasi 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 <machine/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 dependant 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 */ 138 139 u_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 1 145 146 BootConfig bootconfig; /* Boot config storage */ 147 char *boot_args = NULL; 148 char *boot_file = NULL; 149 150 vm_offset_t physical_start; 151 vm_offset_t physical_freestart; 152 vm_offset_t physical_freeend; 153 vm_offset_t physical_end; 154 u_int free_pages; 155 156 /*int debug_flags;*/ 157 #ifndef PMAP_STATIC_L1S 158 int max_processes = 64; /* Default number */ 159 #endif /* !PMAP_STATIC_L1S */ 160 161 /* Physical and virtual addresses for some global pages */ 162 pv_addr_t irqstack; 163 pv_addr_t undstack; 164 pv_addr_t abtstack; 165 pv_addr_t kernelstack; 166 pv_addr_t minidataclean; 167 168 vm_offset_t msgbufphys; 169 170 extern u_int data_abort_handler_address; 171 extern u_int prefetch_abort_handler_address; 172 extern u_int undefined_handler_address; 173 174 #ifdef PMAP_DEBUG 175 extern 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) 190 191 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 192 193 /* Prototypes */ 194 195 void 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 218 219 int comcnspeed = CONSPEED; 220 int comcnmode = CONMODE; 221 int comcnunit = CONUNIT; 222 223 #if KGDB 224 #ifndef KGDB_DEVNAME 225 #error Must define KGDB_DEVNAME 226 #endif 227 const char kgdb_devname[] = KGDB_DEVNAME; 228 229 #ifndef KGDB_DEVADDR 230 #error Must define KGDB_DEVADDR 231 #endif 232 unsigned long kgdb_devaddr = KGDB_DEVADDR; 233 234 #ifndef KGDB_DEVRATE 235 #define KGDB_DEVRATE CONSPEED 236 #endif 237 int kgdb_devrate = KGDB_DEVRATE; 238 239 #ifndef KGDB_DEVMODE 240 #define KGDB_DEVMODE CONMODE 241 #endif 242 int kgdb_devmode = KGDB_DEVMODE; 243 #endif /* KGDB */ 244 245 #if defined(I80321_REBOOT) 246 extern void I80321_REBOOT(int); 247 #endif 248 249 /* 250 * void cpu_reboot(int howto, char *bootstr) 251 * 252 * Reboots the system 253 * 254 * Deal with any syncing, unmounting, dumping and shutdown hooks, 255 * then reset the CPU. 256 */ 257 void 258 cpu_reboot(int howto, char *bootstr) 259 { 260 261 /* 262 * If we are still cold then hit the air brakes 263 * and crash to earth fast 264 */ 265 if (cold) { 266 doshutdownhooks(); 267 pmf_system_shutdown(boothowto); 268 printf("The operating system has halted.\n"); 269 printf("Please press any key to reboot.\n\n"); 270 cngetc(); 271 printf("rebooting...\n"); 272 goto reset; 273 } 274 275 /* Disable console buffering */ 276 277 /* 278 * If RB_NOSYNC was not specified sync the discs. 279 * Note: Unless cold is set to 1 here, syslogd will die during the 280 * unmount. It looks like syslogd is getting woken up only to find 281 * that it cannot page part of the binary in as the filesystem has 282 * been unmounted. 283 */ 284 if (!(howto & RB_NOSYNC)) 285 bootsync(); 286 287 /* Say NO to interrupts */ 288 splhigh(); 289 290 /* Do a dump if requested. */ 291 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 292 dumpsys(); 293 294 /* Run any shutdown hooks */ 295 doshutdownhooks(); 296 297 pmf_system_shutdown(boothowto); 298 299 /* Make sure IRQ's are disabled */ 300 IRQdisable; 301 302 if (howto & RB_HALT) { 303 #if defined(I80321_REBOOT) 304 I80321_REBOOT(howto); 305 #endif 306 iq80321_7seg('.', '.'); 307 printf("The operating system has halted.\n"); 308 printf("Please press any key to reboot.\n\n"); 309 cngetc(); 310 } 311 312 printf("rebooting...\n\r"); 313 reset: 314 #if defined(I80321_REBOOT) 315 I80321_REBOOT(howto); 316 #endif 317 318 /* 319 * Make really really sure that all interrupts are disabled, 320 * and poke the Internal Bus and Peripheral Bus reset lines. 321 */ 322 (void) disable_interrupts(I32_bit|F32_bit); 323 *(volatile uint32_t *)(IQ80321_80321_VBASE + VERDE_ATU_BASE + 324 ATU_PCSR) = PCSR_RIB | PCSR_RPB; 325 326 /* ...and if that didn't work, just croak. */ 327 printf("RESET FAILED!\n"); 328 for (;;); 329 } 330 331 /* Static device mappings. */ 332 static const struct pmap_devmap iq80321_devmap[] = { 333 /* 334 * Map the on-board devices VA == PA so that we can access them 335 * with the MMU on or off. 336 */ 337 { 338 IQ80321_OBIO_BASE, 339 IQ80321_OBIO_BASE, 340 IQ80321_OBIO_SIZE, 341 VM_PROT_READ|VM_PROT_WRITE, 342 PTE_NOCACHE, 343 }, 344 345 { 346 IQ80321_IOW_VBASE, 347 VERDE_OUT_XLATE_IO_WIN0_BASE, 348 VERDE_OUT_XLATE_IO_WIN_SIZE, 349 VM_PROT_READ|VM_PROT_WRITE, 350 PTE_NOCACHE, 351 }, 352 353 { 354 IQ80321_80321_VBASE, 355 VERDE_PMMR_BASE, 356 VERDE_PMMR_SIZE, 357 VM_PROT_READ|VM_PROT_WRITE, 358 PTE_NOCACHE, 359 }, 360 361 { 362 0, 363 0, 364 0, 365 0, 366 0, 367 } 368 }; 369 370 static void 371 iq80321_hardclock_hook(void) 372 { 373 static int snakefreq; 374 375 if ((snakefreq++ & 15) == 0) 376 iq80321_7seg_snake(); 377 } 378 379 /* 380 * u_int initarm(...) 381 * 382 * Initial entry point on startup. This gets called before main() is 383 * entered. 384 * It should be responsible for setting up everything that must be 385 * in place when main is called. 386 * This includes 387 * Taking a copy of the boot configuration structure. 388 * Initialising the physical console so characters can be printed. 389 * Setting up page tables for the kernel 390 * Relocating the kernel to the bottom of physical memory 391 */ 392 u_int 393 initarm(void *arg) 394 { 395 extern vaddr_t xscale_cache_clean_addr; 396 #ifdef DIAGNOSTIC 397 extern vsize_t xscale_minidata_clean_size; 398 #endif 399 int loop; 400 int loop1; 401 u_int l1pagetable; 402 paddr_t memstart; 403 psize_t memsize; 404 405 /* 406 * Clear out the 7-segment display. Whee, the first visual 407 * indication that we're running kernel code. 408 */ 409 iq80321_7seg(' ', ' '); 410 411 /* Calibrate the delay loop. */ 412 i80321_calibrate_delay(); 413 i80321_hardclock_hook = iq80321_hardclock_hook; 414 415 /* 416 * Since we map the on-board devices VA==PA, and the kernel 417 * is running VA==PA, it's possible for us to initialize 418 * the console now. 419 */ 420 consinit(); 421 422 #ifdef VERBOSE_INIT_ARM 423 /* Talk to the user */ 424 printf("\nNetBSD/evbarm (IQ80321) booting ...\n"); 425 #endif 426 427 /* 428 * Heads up ... Setup the CPU / MMU / TLB functions 429 */ 430 if (set_cpufuncs()) 431 panic("CPU not recognized!"); 432 433 /* 434 * We are currently running with the MMU enabled and the 435 * entire address space mapped VA==PA, except for the 436 * first 64M of RAM is also double-mapped at 0xc0000000. 437 * There is an L1 page table at 0xa0004000. 438 */ 439 440 /* 441 * Fetch the SDRAM start/size from the i80321 SDRAM configuration 442 * registers. 443 */ 444 i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE, 445 &memstart, &memsize); 446 447 #ifdef VERBOSE_INIT_ARM 448 printf("initarm: Configuring system ...\n"); 449 #endif 450 451 /* Fake bootconfig structure for the benefit of pmap.c */ 452 /* XXX must make the memory description h/w independent */ 453 bootconfig.dramblocks = 1; 454 bootconfig.dram[0].address = memstart; 455 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 456 457 /* 458 * Set up the variables that define the availablilty of 459 * physical memory. For now, we're going to set 460 * physical_freestart to 0xa0200000 (where the kernel 461 * was loaded), and allocate the memory we need downwards. 462 * If we get too close to the L1 table that we set up, we 463 * will panic. We will update physical_freestart and 464 * physical_freeend later to reflect what pmap_bootstrap() 465 * wants to see. 466 * 467 * XXX pmap_bootstrap() needs an enema. 468 */ 469 physical_start = bootconfig.dram[0].address; 470 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 471 472 physical_freestart = 0xa0009000UL; 473 physical_freeend = 0xa0200000UL; 474 475 physmem = (physical_end - physical_start) / PAGE_SIZE; 476 477 #ifdef VERBOSE_INIT_ARM 478 /* Tell the user about the memory */ 479 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 480 physical_start, physical_end - 1); 481 #endif 482 483 /* 484 * Okay, the kernel starts 2MB in from the bottom of physical 485 * memory. We are going to allocate our bootstrap pages downwards 486 * from there. 487 * 488 * We need to allocate some fixed page tables to get the kernel 489 * going. We allocate one page directory and a number of page 490 * tables and store the physical addresses in the kernel_pt_table 491 * array. 492 * 493 * The kernel page directory must be on a 16K boundary. The page 494 * tables must be on 4K boundaries. What we do is allocate the 495 * page directory on the first 16K boundary that we encounter, and 496 * the page tables on 4K boundaries otherwise. Since we allocate 497 * at least 3 L2 page tables, we are guaranteed to encounter at 498 * least one 16K aligned region. 499 */ 500 501 #ifdef VERBOSE_INIT_ARM 502 printf("Allocating page tables\n"); 503 #endif 504 505 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 506 507 #ifdef VERBOSE_INIT_ARM 508 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 509 physical_freestart, free_pages, free_pages); 510 #endif 511 512 /* Define a macro to simplify memory allocation */ 513 #define valloc_pages(var, np) \ 514 alloc_pages((var).pv_pa, (np)); \ 515 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 516 517 #define alloc_pages(var, np) \ 518 physical_freeend -= ((np) * PAGE_SIZE); \ 519 if (physical_freeend < physical_freestart) \ 520 panic("initarm: out of memory"); \ 521 (var) = physical_freeend; \ 522 free_pages -= (np); \ 523 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 524 525 loop1 = 0; 526 kernel_l1pt.pv_pa = 0; 527 kernel_l1pt.pv_va = 0; 528 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 529 /* Are we 16KB aligned for an L1 ? */ 530 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 531 && kernel_l1pt.pv_pa == 0) { 532 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 533 } else { 534 valloc_pages(kernel_pt_table[loop1], 535 L2_TABLE_SIZE / PAGE_SIZE); 536 ++loop1; 537 } 538 } 539 540 /* This should never be able to happen but better confirm that. */ 541 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 542 panic("initarm: Failed to align the kernel page directory"); 543 544 /* 545 * Allocate a page for the system page mapped to V0x00000000 546 * This page will just contain the system vectors and can be 547 * shared by all processes. 548 */ 549 alloc_pages(systempage.pv_pa, 1); 550 551 /* Allocate stacks for all modes */ 552 valloc_pages(irqstack, IRQ_STACK_SIZE); 553 valloc_pages(abtstack, ABT_STACK_SIZE); 554 valloc_pages(undstack, UND_STACK_SIZE); 555 valloc_pages(kernelstack, UPAGES); 556 557 /* Allocate enough pages for cleaning the Mini-Data cache. */ 558 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 559 valloc_pages(minidataclean, 1); 560 561 #ifdef VERBOSE_INIT_ARM 562 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 563 irqstack.pv_va); 564 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 565 abtstack.pv_va); 566 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 567 undstack.pv_va); 568 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 569 kernelstack.pv_va); 570 #endif 571 572 /* 573 * XXX Defer this to later so that we can reclaim the memory 574 * XXX used by the RedBoot page tables. 575 */ 576 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 577 578 /* 579 * Ok we have allocated physical pages for the primary kernel 580 * page tables 581 */ 582 583 #ifdef VERBOSE_INIT_ARM 584 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 585 #endif 586 587 /* 588 * Now we start construction of the L1 page table 589 * We start by mapping the L2 page tables into the L1. 590 * This means that we can replace L1 mappings later on if necessary 591 */ 592 l1pagetable = kernel_l1pt.pv_pa; 593 594 /* Map the L2 pages tables in the L1 page table */ 595 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 596 &kernel_pt_table[KERNEL_PT_SYS]); 597 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 598 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 599 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 600 pmap_link_l2pt(l1pagetable, IQ80321_IOPXS_VBASE, 601 &kernel_pt_table[KERNEL_PT_IOPXS]); 602 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 603 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 604 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 605 606 /* update the top of the kernel VM */ 607 pmap_curmaxkvaddr = 608 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 609 610 #ifdef VERBOSE_INIT_ARM 611 printf("Mapping kernel\n"); 612 #endif 613 614 /* Now we fill in the L2 pagetable for the kernel static code/data */ 615 { 616 extern char etext[], _end[]; 617 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 618 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 619 u_int logical; 620 621 textsize = (textsize + PGOFSET) & ~PGOFSET; 622 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 623 624 logical = 0x00200000; /* offset of kernel in RAM */ 625 626 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 627 physical_start + logical, textsize, 628 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 629 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 630 physical_start + logical, totalsize - textsize, 631 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 632 } 633 634 #ifdef VERBOSE_INIT_ARM 635 printf("Constructing L2 page tables\n"); 636 #endif 637 638 /* Map the stack pages */ 639 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 640 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 641 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 642 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 643 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 644 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 645 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 646 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 647 648 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 649 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 650 651 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 652 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 653 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 654 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 655 } 656 657 /* Map the Mini-Data cache clean area. */ 658 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 659 minidataclean.pv_pa); 660 661 /* Map the vector page. */ 662 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 663 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 664 665 /* Map the statically mapped devices. */ 666 pmap_devmap_bootstrap(l1pagetable, iq80321_devmap); 667 668 /* 669 * Give the XScale global cache clean code an appropriately 670 * sized chunk of unmapped VA space starting at 0xff000000 671 * (our device mappings end before this address). 672 */ 673 xscale_cache_clean_addr = 0xff000000U; 674 675 /* 676 * Now we have the real page tables in place so we can switch to them. 677 * Once this is done we will be running with the REAL kernel page 678 * tables. 679 */ 680 681 /* 682 * Update the physical_freestart/physical_freeend/free_pages 683 * variables. 684 */ 685 { 686 extern char _end[]; 687 688 physical_freestart = physical_start + 689 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 690 KERNEL_BASE); 691 physical_freeend = physical_end; 692 free_pages = 693 (physical_freeend - physical_freestart) / PAGE_SIZE; 694 } 695 696 /* Switch tables */ 697 #ifdef VERBOSE_INIT_ARM 698 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 699 physical_freestart, free_pages, free_pages); 700 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 701 #endif 702 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 703 cpu_setttb(kernel_l1pt.pv_pa); 704 cpu_tlb_flushID(); 705 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 706 707 /* 708 * Moved from cpu_startup() as data_abort_handler() references 709 * this during uvm init 710 */ 711 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 712 713 #ifdef VERBOSE_INIT_ARM 714 printf("done!\n"); 715 #endif 716 717 #ifdef VERBOSE_INIT_ARM 718 printf("bootstrap done.\n"); 719 #endif 720 721 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 722 723 /* 724 * Pages were allocated during the secondary bootstrap for the 725 * stacks for different CPU modes. 726 * We must now set the r13 registers in the different CPU modes to 727 * point to these stacks. 728 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 729 * of the stack memory. 730 */ 731 #ifdef VERBOSE_INIT_ARM 732 printf("init subsystems: stacks "); 733 #endif 734 735 set_stackptr(PSR_IRQ32_MODE, 736 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 737 set_stackptr(PSR_ABT32_MODE, 738 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 739 set_stackptr(PSR_UND32_MODE, 740 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 741 742 /* 743 * Well we should set a data abort handler. 744 * Once things get going this will change as we will need a proper 745 * handler. 746 * Until then we will use a handler that just panics but tells us 747 * why. 748 * Initialisation of the vectors will just panic on a data abort. 749 * This just fills in a slightly better one. 750 */ 751 #ifdef VERBOSE_INIT_ARM 752 printf("vectors "); 753 #endif 754 data_abort_handler_address = (u_int)data_abort_handler; 755 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 756 undefined_handler_address = (u_int)undefinedinstruction_bounce; 757 758 /* Initialise the undefined instruction handlers */ 759 #ifdef VERBOSE_INIT_ARM 760 printf("undefined "); 761 #endif 762 undefined_init(); 763 764 /* Load memory into UVM. */ 765 #ifdef VERBOSE_INIT_ARM 766 printf("page "); 767 #endif 768 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 769 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 770 atop(physical_freestart), atop(physical_freeend), 771 VM_FREELIST_DEFAULT); 772 773 /* Boot strap pmap telling it where the kernel page table is */ 774 #ifdef VERBOSE_INIT_ARM 775 printf("pmap "); 776 #endif 777 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 778 779 /* Setup the IRQ system */ 780 #ifdef VERBOSE_INIT_ARM 781 printf("irq "); 782 #endif 783 i80321_intr_init(); 784 785 #ifdef VERBOSE_INIT_ARM 786 printf("done.\n"); 787 #endif 788 789 #ifdef BOOTHOWTO 790 boothowto = BOOTHOWTO; 791 #endif 792 793 #ifdef DDB 794 db_machine_init(); 795 if (boothowto & RB_KDB) 796 Debugger(); 797 #endif 798 799 /* We return the new stack pointer address */ 800 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 801 } 802 803 void 804 consinit(void) 805 { 806 static const bus_addr_t comcnaddrs[] = { 807 IQ80321_UART1, /* com0 */ 808 }; 809 static int consinit_called; 810 811 if (consinit_called != 0) 812 return; 813 814 consinit_called = 1; 815 816 /* 817 * Console devices are mapped VA==PA. Our devmap reflects 818 * this, so register it now so drivers can map the console 819 * device. 820 */ 821 pmap_devmap_register(iq80321_devmap); 822 823 #if NCOM > 0 824 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 825 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 826 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 827 #else 828 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 829 #endif 830 #if KGDB 831 #if NCOM > 0 832 if (strcmp(kgdb_devname, "com") == 0) { 833 com_kgdb_attach(&obio_bs_tag, kgdb_devaddr, kgdb_devrate, 834 COM_FREQ, COM_TYPE_NORMAL, kgdb_devmode); 835 } 836 #endif /* NCOM > 0 */ 837 #endif /* KGDB */ 838 } 839