1 /* $NetBSD: iq80321_machdep.c,v 1.34 2005/12/11 12:17:09 christos 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 1.34 2005/12/11 12:17:09 christos 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 "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 * Address to call from cpu_reset() to reset the machine. 133 * This is machine architecture dependant as it varies depending 134 * on where the ROM appears when you turn the MMU off. 135 * 136 * XXX Not actally used on IQ80321 -- clean up the generic 137 * ARM code. 138 */ 139 140 u_int cpu_reset_address = 0x00000000; 141 142 /* Define various stack sizes in pages */ 143 #define IRQ_STACK_SIZE 1 144 #define ABT_STACK_SIZE 1 145 #ifdef IPKDB 146 #define UND_STACK_SIZE 2 147 #else 148 #define UND_STACK_SIZE 1 149 #endif 150 151 BootConfig bootconfig; /* Boot config storage */ 152 char *boot_args = NULL; 153 char *boot_file = NULL; 154 155 vm_offset_t physical_start; 156 vm_offset_t physical_freestart; 157 vm_offset_t physical_freeend; 158 vm_offset_t physical_end; 159 u_int free_pages; 160 vm_offset_t pagetables_start; 161 int physmem = 0; 162 163 /*int debug_flags;*/ 164 #ifndef PMAP_STATIC_L1S 165 int max_processes = 64; /* Default number */ 166 #endif /* !PMAP_STATIC_L1S */ 167 168 /* Physical and virtual addresses for some global pages */ 169 pv_addr_t systempage; 170 pv_addr_t irqstack; 171 pv_addr_t undstack; 172 pv_addr_t abtstack; 173 pv_addr_t kernelstack; 174 pv_addr_t minidataclean; 175 176 vm_offset_t msgbufphys; 177 178 extern u_int data_abort_handler_address; 179 extern u_int prefetch_abort_handler_address; 180 extern u_int undefined_handler_address; 181 182 #ifdef PMAP_DEBUG 183 extern int pmap_debug_level; 184 #endif 185 186 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 187 188 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 189 #define KERNEL_PT_KERNEL_NUM 4 190 191 /* L2 table for mapping i80321 */ 192 #define KERNEL_PT_IOPXS (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 193 194 /* L2 tables for mapping kernel VM */ 195 #define KERNEL_PT_VMDATA (KERNEL_PT_IOPXS + 1) 196 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 197 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 198 199 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 200 201 struct user *proc0paddr; 202 203 /* Prototypes */ 204 205 void consinit(void); 206 207 #include "com.h" 208 #if NCOM > 0 209 #include <dev/ic/comreg.h> 210 #include <dev/ic/comvar.h> 211 #endif 212 213 /* 214 * Define the default console speed for the board. This is generally 215 * what the firmware provided with the board defaults to. 216 */ 217 #ifndef CONSPEED 218 #define CONSPEED B115200 219 #endif /* ! CONSPEED */ 220 221 #ifndef CONUNIT 222 #define CONUNIT 0 223 #endif 224 225 #ifndef CONMODE 226 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 227 #endif 228 229 int comcnspeed = CONSPEED; 230 int comcnmode = CONMODE; 231 int comcnunit = CONUNIT; 232 233 #if KGDB 234 #ifndef KGDB_DEVNAME 235 #error Must define KGDB_DEVNAME 236 #endif 237 const char kgdb_devname[] = KGDB_DEVNAME; 238 239 #ifndef KGDB_DEVADDR 240 #error Must define KGDB_DEVADDR 241 #endif 242 unsigned long kgdb_devaddr = KGDB_DEVADDR; 243 244 #ifndef KGDB_DEVRATE 245 #define KGDB_DEVRATE CONSPEED 246 #endif 247 int kgdb_devrate = KGDB_DEVRATE; 248 249 #ifndef KGDB_DEVMODE 250 #define KGDB_DEVMODE CONMODE 251 #endif 252 int kgdb_devmode = KGDB_DEVMODE; 253 #endif /* KGDB */ 254 255 /* 256 * void cpu_reboot(int howto, char *bootstr) 257 * 258 * Reboots the system 259 * 260 * Deal with any syncing, unmounting, dumping and shutdown hooks, 261 * then reset the CPU. 262 */ 263 void 264 cpu_reboot(int howto, char *bootstr) 265 { 266 267 /* 268 * If we are still cold then hit the air brakes 269 * and crash to earth fast 270 */ 271 if (cold) { 272 doshutdownhooks(); 273 printf("The operating system has halted.\n"); 274 printf("Please press any key to reboot.\n\n"); 275 cngetc(); 276 printf("rebooting...\n"); 277 goto reset; 278 } 279 280 /* Disable console buffering */ 281 282 /* 283 * If RB_NOSYNC was not specified sync the discs. 284 * Note: Unless cold is set to 1 here, syslogd will die during the 285 * unmount. It looks like syslogd is getting woken up only to find 286 * that it cannot page part of the binary in as the filesystem has 287 * been unmounted. 288 */ 289 if (!(howto & RB_NOSYNC)) 290 bootsync(); 291 292 /* Say NO to interrupts */ 293 splhigh(); 294 295 /* Do a dump if requested. */ 296 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 297 dumpsys(); 298 299 /* Run any shutdown hooks */ 300 doshutdownhooks(); 301 302 /* Make sure IRQ's are disabled */ 303 IRQdisable; 304 305 if (howto & RB_HALT) { 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 /* 315 * Make really really sure that all interrupts are disabled, 316 * and poke the Internal Bus and Peripheral Bus reset lines. 317 */ 318 (void) disable_interrupts(I32_bit|F32_bit); 319 *(__volatile uint32_t *)(IQ80321_80321_VBASE + VERDE_ATU_BASE + 320 ATU_PCSR) = PCSR_RIB | PCSR_RPB; 321 322 /* ...and if that didn't work, just croak. */ 323 printf("RESET FAILED!\n"); 324 for (;;); 325 } 326 327 /* Static device mappings. */ 328 static const struct pmap_devmap iq80321_devmap[] = { 329 /* 330 * Map the on-board devices VA == PA so that we can access them 331 * with the MMU on or off. 332 */ 333 { 334 IQ80321_OBIO_BASE, 335 IQ80321_OBIO_BASE, 336 IQ80321_OBIO_SIZE, 337 VM_PROT_READ|VM_PROT_WRITE, 338 PTE_NOCACHE, 339 }, 340 341 { 342 IQ80321_IOW_VBASE, 343 VERDE_OUT_XLATE_IO_WIN0_BASE, 344 VERDE_OUT_XLATE_IO_WIN_SIZE, 345 VM_PROT_READ|VM_PROT_WRITE, 346 PTE_NOCACHE, 347 }, 348 349 { 350 IQ80321_80321_VBASE, 351 VERDE_PMMR_BASE, 352 VERDE_PMMR_SIZE, 353 VM_PROT_READ|VM_PROT_WRITE, 354 PTE_NOCACHE, 355 }, 356 357 { 358 0, 359 0, 360 0, 361 0, 362 0, 363 } 364 }; 365 366 static void 367 iq80321_hardclock_hook(void) 368 { 369 static int snakefreq; 370 371 if ((snakefreq++ & 15) == 0) 372 iq80321_7seg_snake(); 373 } 374 375 /* 376 * u_int initarm(...) 377 * 378 * Initial entry point on startup. This gets called before main() is 379 * entered. 380 * It should be responsible for setting up everything that must be 381 * in place when main is called. 382 * This includes 383 * Taking a copy of the boot configuration structure. 384 * Initialising the physical console so characters can be printed. 385 * Setting up page tables for the kernel 386 * Relocating the kernel to the bottom of physical memory 387 */ 388 u_int 389 initarm(void *arg) 390 { 391 extern vaddr_t xscale_cache_clean_addr; 392 #ifdef DIAGNOSTIC 393 extern vsize_t xscale_minidata_clean_size; 394 #endif 395 int loop; 396 int loop1; 397 u_int l1pagetable; 398 pv_addr_t kernel_l1pt; 399 paddr_t memstart; 400 psize_t memsize; 401 402 /* 403 * Clear out the 7-segment display. Whee, the first visual 404 * indication that we're running kernel code. 405 */ 406 iq80321_7seg(' ', ' '); 407 408 /* Calibrate the delay loop. */ 409 i80321_calibrate_delay(); 410 i80321_hardclock_hook = iq80321_hardclock_hook; 411 412 /* 413 * Since we map the on-board devices VA==PA, and the kernel 414 * is running VA==PA, it's possible for us to initialize 415 * the console now. 416 */ 417 consinit(); 418 419 #ifdef VERBOSE_INIT_ARM 420 /* Talk to the user */ 421 printf("\nNetBSD/evbarm (IQ80321) booting ...\n"); 422 #endif 423 424 /* 425 * Heads up ... Setup the CPU / MMU / TLB functions 426 */ 427 if (set_cpufuncs()) 428 panic("CPU not recognized!"); 429 430 /* 431 * We are currently running with the MMU enabled and the 432 * entire address space mapped VA==PA, except for the 433 * first 64M of RAM is also double-mapped at 0xc0000000. 434 * There is an L1 page table at 0xa0004000. 435 */ 436 437 /* 438 * Fetch the SDRAM start/size from the i80321 SDRAM configuration 439 * registers. 440 */ 441 i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE, 442 &memstart, &memsize); 443 444 #ifdef VERBOSE_INIT_ARM 445 printf("initarm: Configuring system ...\n"); 446 #endif 447 448 /* Fake bootconfig structure for the benefit of pmap.c */ 449 /* XXX must make the memory description h/w independant */ 450 bootconfig.dramblocks = 1; 451 bootconfig.dram[0].address = memstart; 452 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 453 454 /* 455 * Set up the variables that define the availablilty of 456 * physical memory. For now, we're going to set 457 * physical_freestart to 0xa0200000 (where the kernel 458 * was loaded), and allocate the memory we need downwards. 459 * If we get too close to the L1 table that we set up, we 460 * will panic. We will update physical_freestart and 461 * physical_freeend later to reflect what pmap_bootstrap() 462 * wants to see. 463 * 464 * XXX pmap_bootstrap() needs an enema. 465 */ 466 physical_start = bootconfig.dram[0].address; 467 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 468 469 physical_freestart = 0xa0009000UL; 470 physical_freeend = 0xa0200000UL; 471 472 physmem = (physical_end - physical_start) / PAGE_SIZE; 473 474 #ifdef VERBOSE_INIT_ARM 475 /* Tell the user about the memory */ 476 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 477 physical_start, physical_end - 1); 478 #endif 479 480 /* 481 * Okay, the kernel starts 2MB in from the bottom of physical 482 * memory. We are going to allocate our bootstrap pages downwards 483 * from there. 484 * 485 * We need to allocate some fixed page tables to get the kernel 486 * going. We allocate one page directory and a number of page 487 * tables and store the physical addresses in the kernel_pt_table 488 * array. 489 * 490 * The kernel page directory must be on a 16K boundary. The page 491 * tables must be on 4K boundaries. What we do is allocate the 492 * page directory on the first 16K boundary that we encounter, and 493 * the page tables on 4K boundaries otherwise. Since we allocate 494 * at least 3 L2 page tables, we are guaranteed to encounter at 495 * least one 16K aligned region. 496 */ 497 498 #ifdef VERBOSE_INIT_ARM 499 printf("Allocating page tables\n"); 500 #endif 501 502 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 503 504 #ifdef VERBOSE_INIT_ARM 505 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 506 physical_freestart, free_pages, free_pages); 507 #endif 508 509 /* Define a macro to simplify memory allocation */ 510 #define valloc_pages(var, np) \ 511 alloc_pages((var).pv_pa, (np)); \ 512 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 513 514 #define alloc_pages(var, np) \ 515 physical_freeend -= ((np) * PAGE_SIZE); \ 516 if (physical_freeend < physical_freestart) \ 517 panic("initarm: out of memory"); \ 518 (var) = physical_freeend; \ 519 free_pages -= (np); \ 520 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 521 522 loop1 = 0; 523 kernel_l1pt.pv_pa = 0; 524 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 525 /* Are we 16KB aligned for an L1 ? */ 526 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 527 && kernel_l1pt.pv_pa == 0) { 528 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 529 } else { 530 valloc_pages(kernel_pt_table[loop1], 531 L2_TABLE_SIZE / PAGE_SIZE); 532 ++loop1; 533 } 534 } 535 536 /* This should never be able to happen but better confirm that. */ 537 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 538 panic("initarm: Failed to align the kernel page directory"); 539 540 /* 541 * Allocate a page for the system page mapped to V0x00000000 542 * This page will just contain the system vectors and can be 543 * shared by all processes. 544 */ 545 alloc_pages(systempage.pv_pa, 1); 546 547 /* Allocate stacks for all modes */ 548 valloc_pages(irqstack, IRQ_STACK_SIZE); 549 valloc_pages(abtstack, ABT_STACK_SIZE); 550 valloc_pages(undstack, UND_STACK_SIZE); 551 valloc_pages(kernelstack, UPAGES); 552 553 /* Allocate enough pages for cleaning the Mini-Data cache. */ 554 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 555 valloc_pages(minidataclean, 1); 556 557 #ifdef VERBOSE_INIT_ARM 558 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 559 irqstack.pv_va); 560 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 561 abtstack.pv_va); 562 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 563 undstack.pv_va); 564 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 565 kernelstack.pv_va); 566 #endif 567 568 /* 569 * XXX Defer this to later so that we can reclaim the memory 570 * XXX used by the RedBoot page tables. 571 */ 572 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 573 574 /* 575 * Ok we have allocated physical pages for the primary kernel 576 * page tables 577 */ 578 579 #ifdef VERBOSE_INIT_ARM 580 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 581 #endif 582 583 /* 584 * Now we start construction of the L1 page table 585 * We start by mapping the L2 page tables into the L1. 586 * This means that we can replace L1 mappings later on if necessary 587 */ 588 l1pagetable = kernel_l1pt.pv_pa; 589 590 /* Map the L2 pages tables in the L1 page table */ 591 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 592 &kernel_pt_table[KERNEL_PT_SYS]); 593 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 594 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 595 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 596 pmap_link_l2pt(l1pagetable, IQ80321_IOPXS_VBASE, 597 &kernel_pt_table[KERNEL_PT_IOPXS]); 598 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 599 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 600 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 601 602 /* update the top of the kernel VM */ 603 pmap_curmaxkvaddr = 604 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 605 606 #ifdef VERBOSE_INIT_ARM 607 printf("Mapping kernel\n"); 608 #endif 609 610 /* Now we fill in the L2 pagetable for the kernel static code/data */ 611 { 612 extern char etext[], _end[]; 613 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 614 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 615 u_int logical; 616 617 textsize = (textsize + PGOFSET) & ~PGOFSET; 618 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 619 620 logical = 0x00200000; /* offset of kernel in RAM */ 621 622 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 623 physical_start + logical, textsize, 624 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 625 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 626 physical_start + logical, totalsize - textsize, 627 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 628 } 629 630 #ifdef VERBOSE_INIT_ARM 631 printf("Constructing L2 page tables\n"); 632 #endif 633 634 /* Map the stack pages */ 635 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 636 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 637 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 638 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 639 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 640 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 641 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 642 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 643 644 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 645 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 646 647 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 648 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 649 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 650 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 651 } 652 653 /* Map the Mini-Data cache clean area. */ 654 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 655 minidataclean.pv_pa); 656 657 /* Map the vector page. */ 658 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 659 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 660 661 /* Map the statically mapped devices. */ 662 pmap_devmap_bootstrap(l1pagetable, iq80321_devmap); 663 664 /* 665 * Give the XScale global cache clean code an appropriately 666 * sized chunk of unmapped VA space starting at 0xff000000 667 * (our device mappings end before this address). 668 */ 669 xscale_cache_clean_addr = 0xff000000U; 670 671 /* 672 * Now we have the real page tables in place so we can switch to them. 673 * Once this is done we will be running with the REAL kernel page 674 * tables. 675 */ 676 677 /* 678 * Update the physical_freestart/physical_freeend/free_pages 679 * variables. 680 */ 681 { 682 extern char _end[]; 683 684 physical_freestart = physical_start + 685 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 686 KERNEL_BASE); 687 physical_freeend = physical_end; 688 free_pages = 689 (physical_freeend - physical_freestart) / PAGE_SIZE; 690 } 691 692 /* Switch tables */ 693 #ifdef VERBOSE_INIT_ARM 694 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 695 physical_freestart, free_pages, free_pages); 696 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 697 #endif 698 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 699 setttb(kernel_l1pt.pv_pa); 700 cpu_tlb_flushID(); 701 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 702 703 /* 704 * Moved from cpu_startup() as data_abort_handler() references 705 * this during uvm init 706 */ 707 proc0paddr = (struct user *)kernelstack.pv_va; 708 lwp0.l_addr = proc0paddr; 709 710 #ifdef VERBOSE_INIT_ARM 711 printf("done!\n"); 712 #endif 713 714 #ifdef VERBOSE_INIT_ARM 715 printf("bootstrap done.\n"); 716 #endif 717 718 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 719 720 /* 721 * Pages were allocated during the secondary bootstrap for the 722 * stacks for different CPU modes. 723 * We must now set the r13 registers in the different CPU modes to 724 * point to these stacks. 725 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 726 * of the stack memory. 727 */ 728 #ifdef VERBOSE_INIT_ARM 729 printf("init subsystems: stacks "); 730 #endif 731 732 set_stackptr(PSR_IRQ32_MODE, 733 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 734 set_stackptr(PSR_ABT32_MODE, 735 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 736 set_stackptr(PSR_UND32_MODE, 737 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 738 739 /* 740 * Well we should set a data abort handler. 741 * Once things get going this will change as we will need a proper 742 * handler. 743 * Until then we will use a handler that just panics but tells us 744 * why. 745 * Initialisation of the vectors will just panic on a data abort. 746 * This just fills in a slightly better one. 747 */ 748 #ifdef VERBOSE_INIT_ARM 749 printf("vectors "); 750 #endif 751 data_abort_handler_address = (u_int)data_abort_handler; 752 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 753 undefined_handler_address = (u_int)undefinedinstruction_bounce; 754 755 /* Initialise the undefined instruction handlers */ 756 #ifdef VERBOSE_INIT_ARM 757 printf("undefined "); 758 #endif 759 undefined_init(); 760 761 /* Load memory into UVM. */ 762 #ifdef VERBOSE_INIT_ARM 763 printf("page "); 764 #endif 765 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 766 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 767 atop(physical_freestart), atop(physical_freeend), 768 VM_FREELIST_DEFAULT); 769 770 /* Boot strap pmap telling it where the kernel page table is */ 771 #ifdef VERBOSE_INIT_ARM 772 printf("pmap "); 773 #endif 774 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 775 KERNEL_VM_BASE + KERNEL_VM_SIZE); 776 777 /* Setup the IRQ system */ 778 #ifdef VERBOSE_INIT_ARM 779 printf("irq "); 780 #endif 781 i80321_intr_init(); 782 783 #ifdef VERBOSE_INIT_ARM 784 printf("done.\n"); 785 #endif 786 787 #ifdef BOOTHOWTO 788 boothowto = BOOTHOWTO; 789 #endif 790 791 #ifdef IPKDB 792 /* Initialise ipkdb */ 793 ipkdb_init(); 794 if (boothowto & RB_KDB) 795 ipkdb_connect(0); 796 #endif 797 798 #if NKSYMS || defined(DDB) || defined(LKM) 799 /* Firmware doesn't load symbols. */ 800 ksyms_init(0, NULL, NULL); 801 #endif 802 803 #ifdef DDB 804 db_machine_init(); 805 if (boothowto & RB_KDB) 806 Debugger(); 807 #endif 808 809 /* We return the new stack pointer address */ 810 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 811 } 812 813 void 814 consinit(void) 815 { 816 static const bus_addr_t comcnaddrs[] = { 817 IQ80321_UART1, /* com0 */ 818 }; 819 static int consinit_called; 820 821 if (consinit_called != 0) 822 return; 823 824 consinit_called = 1; 825 826 /* 827 * Console devices are mapped VA==PA. Our devmap reflects 828 * this, so register it now so drivers can map the console 829 * device. 830 */ 831 pmap_devmap_register(iq80321_devmap); 832 833 #if NCOM > 0 834 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 835 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 836 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 837 #else 838 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 839 #endif 840 #if KGDB 841 #if NCOM > 0 842 if (strcmp(kgdb_devname, "com") == 0) { 843 com_kgdb_attach(&obio_bs_tag, kgdb_devaddr, kgdb_devrate, 844 COM_FREQ, COM_TYPE_NORMAL, kgdb_devmode); 845 } 846 #endif /* NCOM > 0 */ 847 #endif /* KGDB */ 848 } 849