1 /* $NetBSD: iq80321_machdep.c,v 1.6 2002/04/12 20:50:27 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 2001, 2002 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe 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 "opt_ddb.h" 76 #include "opt_pmap_debug.h" 77 78 #include <sys/param.h> 79 #include <sys/device.h> 80 #include <sys/systm.h> 81 #include <sys/kernel.h> 82 #include <sys/exec.h> 83 #include <sys/proc.h> 84 #include <sys/msgbuf.h> 85 #include <sys/reboot.h> 86 #include <sys/termios.h> 87 88 #include <dev/cons.h> 89 90 #include <machine/db_machdep.h> 91 #include <ddb/db_sym.h> 92 #include <ddb/db_extern.h> 93 94 #include <machine/bootconfig.h> 95 #include <machine/bus.h> 96 #include <machine/cpu.h> 97 #include <machine/frame.h> 98 #include <arm/undefined.h> 99 100 #include <arm/arm32/machdep.h> 101 102 #include <arm/xscale/i80321reg.h> 103 #include <arm/xscale/i80321var.h> 104 105 #include <dev/pci/ppbreg.h> 106 107 #include <evbarm/iq80321/iq80321reg.h> 108 #include <evbarm/iq80321/iq80321var.h> 109 #include <evbarm/iq80321/obiovar.h> 110 111 #include "opt_ipkdb.h" 112 113 /* 114 * Address to call from cpu_reset() to reset the machine. 115 * This is machine architecture dependant as it varies depending 116 * on where the ROM appears when you turn the MMU off. 117 * 118 * XXX Not actally used on IQ80321 -- clean up the generic 119 * ARM code. 120 */ 121 122 u_int cpu_reset_address = 0x00000000; 123 124 /* Define various stack sizes in pages */ 125 #define IRQ_STACK_SIZE 1 126 #define ABT_STACK_SIZE 1 127 #ifdef IPKDB 128 #define UND_STACK_SIZE 2 129 #else 130 #define UND_STACK_SIZE 1 131 #endif 132 133 BootConfig bootconfig; /* Boot config storage */ 134 char *boot_args = NULL; 135 char *boot_file = NULL; 136 137 vm_offset_t physical_start; 138 vm_offset_t physical_freestart; 139 vm_offset_t physical_freeend; 140 vm_offset_t physical_end; 141 u_int free_pages; 142 vm_offset_t pagetables_start; 143 int physmem = 0; 144 145 /*int debug_flags;*/ 146 #ifndef PMAP_STATIC_L1S 147 int max_processes = 64; /* Default number */ 148 #endif /* !PMAP_STATIC_L1S */ 149 150 /* Physical and virtual addresses for some global pages */ 151 pv_addr_t systempage; 152 pv_addr_t irqstack; 153 pv_addr_t undstack; 154 pv_addr_t abtstack; 155 pv_addr_t kernelstack; 156 pv_addr_t minidataclean; 157 158 vm_offset_t msgbufphys; 159 160 extern u_int data_abort_handler_address; 161 extern u_int prefetch_abort_handler_address; 162 extern u_int undefined_handler_address; 163 164 #ifdef PMAP_DEBUG 165 extern int pmap_debug_level; 166 #endif 167 168 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 169 170 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 171 #define KERNEL_PT_KERNEL_NUM 2 172 173 /* L2 table for mapping i80321 */ 174 #define KERNEL_PT_IOPXS (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 175 176 /* L2 tables for mapping kernel VM */ 177 #define KERNEL_PT_VMDATA (KERNEL_PT_IOPXS + 1) 178 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 179 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 180 181 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 182 183 struct user *proc0paddr; 184 185 /* Prototypes */ 186 187 void consinit(void); 188 189 #include "com.h" 190 #if NCOM > 0 191 #include <dev/ic/comreg.h> 192 #include <dev/ic/comvar.h> 193 #endif 194 195 /* 196 * Define the default console speed for the board. This is generally 197 * what the firmware provided with the board defaults to. 198 */ 199 #ifndef CONSPEED 200 #define CONSPEED B115200 201 #endif /* ! CONSPEED */ 202 203 #ifndef CONUNIT 204 #define CONUNIT 0 205 #endif 206 207 #ifndef CONMODE 208 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 209 #endif 210 211 int comcnspeed = CONSPEED; 212 int comcnmode = CONMODE; 213 int comcnunit = CONUNIT; 214 215 /* 216 * void cpu_reboot(int howto, char *bootstr) 217 * 218 * Reboots the system 219 * 220 * Deal with any syncing, unmounting, dumping and shutdown hooks, 221 * then reset the CPU. 222 */ 223 void 224 cpu_reboot(int howto, char *bootstr) 225 { 226 #ifdef DIAGNOSTIC 227 /* info */ 228 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 229 #endif 230 231 /* 232 * If we are still cold then hit the air brakes 233 * and crash to earth fast 234 */ 235 if (cold) { 236 doshutdownhooks(); 237 printf("The operating system has halted.\n"); 238 printf("Please press any key to reboot.\n\n"); 239 cngetc(); 240 printf("rebooting...\n"); 241 goto reset; 242 } 243 244 /* Disable console buffering */ 245 246 /* 247 * If RB_NOSYNC was not specified sync the discs. 248 * Note: Unless cold is set to 1 here, syslogd will die during the 249 * unmount. It looks like syslogd is getting woken up only to find 250 * that it cannot page part of the binary in as the filesystem has 251 * been unmounted. 252 */ 253 if (!(howto & RB_NOSYNC)) 254 bootsync(); 255 256 /* Say NO to interrupts */ 257 splhigh(); 258 259 /* Do a dump if requested. */ 260 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 261 dumpsys(); 262 263 /* Run any shutdown hooks */ 264 doshutdownhooks(); 265 266 /* Make sure IRQ's are disabled */ 267 IRQdisable; 268 269 if (howto & RB_HALT) { 270 iq80321_7seg('.', '.'); 271 printf("The operating system has halted.\n"); 272 printf("Please press any key to reboot.\n\n"); 273 cngetc(); 274 } 275 276 printf("rebooting...\n\r"); 277 reset: 278 /* 279 * Make really really sure that all interrupts are disabled, 280 * and poke the Internal Bus and Peripheral Bus reset lines. 281 */ 282 (void) disable_interrupts(I32_bit|F32_bit); 283 *(__volatile uint32_t *)(IQ80321_80321_VBASE + VERDE_ATU_BASE + 284 ATU_PCSR) = PCSR_RIB | PCSR_RPB; 285 286 /* ...and if that didn't work, just croak. */ 287 printf("RESET FAILED!\n"); 288 for (;;); 289 } 290 291 /* 292 * Mapping table for core kernel memory. This memory is mapped at init 293 * time with section mappings. 294 */ 295 struct l1_sec_map { 296 vaddr_t va; 297 vaddr_t pa; 298 vsize_t size; 299 vm_prot_t prot; 300 int cache; 301 } l1_sec_table[] = { 302 /* 303 * Map the on-board devices VA == PA so that we can access them 304 * with the MMU on or off. 305 */ 306 { 307 IQ80321_OBIO_BASE, 308 IQ80321_OBIO_BASE, 309 IQ80321_OBIO_SIZE, 310 VM_PROT_READ|VM_PROT_WRITE, 311 PTE_NOCACHE, 312 }, 313 314 { 315 0, 316 0, 317 0, 318 0, 319 0, 320 } 321 }; 322 323 static void 324 iq80321_hardclock_hook(void) 325 { 326 static int snakefreq; 327 328 if ((snakefreq++ & 15) == 0) 329 iq80321_7seg_snake(); 330 } 331 332 /* 333 * u_int initarm(...) 334 * 335 * Initial entry point on startup. This gets called before main() is 336 * entered. 337 * It should be responsible for setting up everything that must be 338 * in place when main is called. 339 * This includes 340 * Taking a copy of the boot configuration structure. 341 * Initialising the physical console so characters can be printed. 342 * Setting up page tables for the kernel 343 * Relocating the kernel to the bottom of physical memory 344 */ 345 u_int 346 initarm(void *arg) 347 { 348 extern vaddr_t xscale_cache_clean_addr; 349 extern vsize_t xscale_minidata_clean_size; 350 int loop; 351 int loop1; 352 u_int l1pagetable; 353 pv_addr_t kernel_l1pt; 354 pv_addr_t kernel_ptpt; 355 paddr_t memstart; 356 psize_t memsize; 357 358 /* 359 * Clear out the 7-segment display. Whee, the first visual 360 * indication that we're running kernel code. 361 */ 362 iq80321_7seg(' ', ' '); 363 364 /* Calibrate the delay loop. */ 365 i80321_calibrate_delay(); 366 i80321_hardclock_hook = iq80321_hardclock_hook; 367 368 /* 369 * Since we map the on-board devices VA==PA, and the kernel 370 * is running VA==PA, it's possible for us to initialize 371 * the console now. 372 */ 373 consinit(); 374 375 /* Talk to the user */ 376 printf("\nNetBSD/evbarm (IQ80321) booting ...\n"); 377 378 /* 379 * Heads up ... Setup the CPU / MMU / TLB functions 380 */ 381 if (set_cpufuncs()) 382 panic("cpu not recognized!"); 383 384 /* 385 * We are currently running with the MMU enabled and the 386 * entire address space mapped VA==PA, except for the 387 * first 64M of RAM is also double-mapped at 0xc0000000. 388 * There is an L1 page table at 0xa0004000. 389 */ 390 391 /* 392 * Fetch the SDRAM start/size from the i80321 SDRAM configration 393 * registers. 394 */ 395 i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE, 396 &memstart, &memsize); 397 398 printf("initarm: Configuring system ...\n"); 399 400 /* Fake bootconfig structure for the benefit of pmap.c */ 401 /* XXX must make the memory description h/w independant */ 402 bootconfig.dramblocks = 1; 403 bootconfig.dram[0].address = memstart; 404 bootconfig.dram[0].pages = memsize / NBPG; 405 406 /* 407 * Set up the variables that define the availablilty of 408 * physical memory. For now, we're going to set 409 * physical_freestart to 0xa0200000 (where the kernel 410 * was loaded), and allocate the memory we need downwards. 411 * If we get too close to the L1 table that we set up, we 412 * will panic. We will update physical_freestart and 413 * physical_freeend later to reflect what pmap_bootstrap() 414 * wants to see. 415 * 416 * XXX pmap_bootstrap() needs an enema. 417 */ 418 physical_start = bootconfig.dram[0].address; 419 physical_end = physical_start + (bootconfig.dram[0].pages * NBPG); 420 421 physical_freestart = 0xa0009000UL; 422 physical_freeend = 0xa0200000UL; 423 424 physmem = (physical_end - physical_start) / NBPG; 425 426 /* Tell the user about the memory */ 427 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 428 physical_start, physical_end - 1); 429 430 /* 431 * Okay, the kernel starts 2MB in from the bottom of physical 432 * memory. We are going to allocate our bootstrap pages downwards 433 * from there. 434 * 435 * We need to allocate some fixed page tables to get the kernel 436 * going. We allocate one page directory and a number of page 437 * tables and store the physical addresses in the kernel_pt_table 438 * array. 439 * 440 * The kernel page directory must be on a 16K boundary. The page 441 * tables must be on 4K bounaries. What we do is allocate the 442 * page directory on the first 16K boundary that we encounter, and 443 * the page tables on 4K boundaries otherwise. Since we allocate 444 * at least 3 L2 page tables, we are guaranteed to encounter at 445 * least one 16K aligned region. 446 */ 447 448 #ifdef VERBOSE_INIT_ARM 449 printf("Allocating page tables\n"); 450 #endif 451 452 free_pages = (physical_freeend - physical_freestart) / NBPG; 453 454 #ifdef VERBOSE_INIT_ARM 455 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 456 physical_freestart, free_pages, free_pages); 457 #endif 458 459 /* Define a macro to simplify memory allocation */ 460 #define valloc_pages(var, np) \ 461 alloc_pages((var).pv_pa, (np)); \ 462 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 463 464 #define alloc_pages(var, np) \ 465 physical_freeend -= ((np) * NBPG); \ 466 if (physical_freeend < physical_freestart) \ 467 panic("initarm: out of memory"); \ 468 (var) = physical_freeend; \ 469 free_pages -= (np); \ 470 memset((char *)(var), 0, ((np) * NBPG)); 471 472 loop1 = 0; 473 kernel_l1pt.pv_pa = 0; 474 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 475 /* Are we 16KB aligned for an L1 ? */ 476 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 477 && kernel_l1pt.pv_pa == 0) { 478 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / NBPG); 479 } else { 480 alloc_pages(kernel_pt_table[loop1].pv_pa, 481 L2_TABLE_SIZE / NBPG); 482 kernel_pt_table[loop1].pv_va = 483 kernel_pt_table[loop1].pv_pa; 484 ++loop1; 485 } 486 } 487 488 /* This should never be able to happen but better confirm that. */ 489 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 490 panic("initarm: Failed to align the kernel page directory\n"); 491 492 /* 493 * Allocate a page for the system page mapped to V0x00000000 494 * This page will just contain the system vectors and can be 495 * shared by all processes. 496 */ 497 alloc_pages(systempage.pv_pa, 1); 498 499 /* Allocate a page for the page table to map kernel page tables. */ 500 valloc_pages(kernel_ptpt, L2_TABLE_SIZE / NBPG); 501 502 /* Allocate stacks for all modes */ 503 valloc_pages(irqstack, IRQ_STACK_SIZE); 504 valloc_pages(abtstack, ABT_STACK_SIZE); 505 valloc_pages(undstack, UND_STACK_SIZE); 506 valloc_pages(kernelstack, UPAGES); 507 508 /* Allocate enough pages for cleaning the Mini-Data cache. */ 509 KASSERT(xscale_minidata_clean_size <= NBPG); 510 valloc_pages(minidataclean, 1); 511 512 #ifdef VERBOSE_INIT_ARM 513 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 514 irqstack.pv_va); 515 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 516 abtstack.pv_va); 517 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 518 undstack.pv_va); 519 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 520 kernelstack.pv_va); 521 #endif 522 523 /* 524 * XXX Defer this to later so that we can reclaim the memory 525 * XXX used by the RedBoot page tables. 526 */ 527 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / NBPG); 528 529 /* 530 * Ok we have allocated physical pages for the primary kernel 531 * page tables 532 */ 533 534 #ifdef VERBOSE_INIT_ARM 535 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 536 #endif 537 538 /* 539 * Now we start construction of the L1 page table 540 * We start by mapping the L2 page tables into the L1. 541 * This means that we can replace L1 mappings later on if necessary 542 */ 543 l1pagetable = kernel_l1pt.pv_pa; 544 545 /* Map the L2 pages tables in the L1 page table */ 546 pmap_link_l2pt(l1pagetable, 0x00000000, 547 &kernel_pt_table[KERNEL_PT_SYS]); 548 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 549 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 550 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 551 pmap_link_l2pt(l1pagetable, IQ80321_IOPXS_VBASE, 552 &kernel_pt_table[KERNEL_PT_IOPXS]); 553 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 554 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 555 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 556 pmap_link_l2pt(l1pagetable, PTE_BASE, &kernel_ptpt); 557 558 /* update the top of the kernel VM */ 559 pmap_curmaxkvaddr = 560 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 561 562 #ifdef VERBOSE_INIT_ARM 563 printf("Mapping kernel\n"); 564 #endif 565 566 /* Now we fill in the L2 pagetable for the kernel static code/data */ 567 { 568 extern char etext[], _end[]; 569 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 570 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 571 u_int logical; 572 573 textsize = (textsize + PGOFSET) & ~PGOFSET; 574 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 575 576 logical = 0x00200000; /* offset of kernel in RAM */ 577 578 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 579 physical_start + logical, textsize, 580 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 581 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 582 physical_start + logical, totalsize - textsize, 583 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 584 } 585 586 #ifdef VERBOSE_INIT_ARM 587 printf("Constructing L2 page tables\n"); 588 #endif 589 590 /* Map the stack pages */ 591 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 592 IRQ_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 593 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 594 ABT_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 595 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 596 UND_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 597 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 598 UPAGES * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 599 600 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 601 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 602 603 /* Map the Mini-Data cache clean area. */ 604 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 605 minidataclean.pv_pa); 606 607 /* Map the page table that maps the kernel pages */ 608 pmap_map_entry(l1pagetable, kernel_ptpt.pv_va, kernel_ptpt.pv_pa, 609 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 610 611 /* 612 * Map entries in the page table used to map PTE's 613 * Basically every kernel page table gets mapped here 614 */ 615 /* The -2 is slightly bogus, it should be -log2(sizeof(pt_entry_t)) */ 616 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) { 617 pmap_map_entry(l1pagetable, 618 PTE_BASE + ((KERNEL_BASE + 619 (loop * 0x00400000)) >> (PGSHIFT-2)), 620 kernel_pt_table[KERNEL_PT_KERNEL + loop].pv_pa, 621 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 622 } 623 pmap_map_entry(l1pagetable, 624 PTE_BASE + (PTE_BASE >> (PGSHIFT-2)), 625 kernel_ptpt.pv_pa, VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 626 pmap_map_entry(l1pagetable, 627 PTE_BASE + (0x00000000 >> (PGSHIFT-2)), 628 kernel_pt_table[KERNEL_PT_SYS].pv_pa, 629 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 630 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 631 pmap_map_entry(l1pagetable, 632 PTE_BASE + ((KERNEL_VM_BASE + 633 (loop * 0x00400000)) >> (PGSHIFT-2)), 634 kernel_pt_table[KERNEL_PT_VMDATA + loop].pv_pa, 635 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 636 637 /* Map the vector page. */ 638 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 639 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 640 641 /* 642 * Map devices we can map w/ section mappings. 643 */ 644 loop = 0; 645 while (l1_sec_table[loop].size) { 646 vm_size_t sz; 647 648 #ifdef VERBOSE_INIT_ARM 649 printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa, 650 l1_sec_table[loop].pa + l1_sec_table[loop].size - 1, 651 l1_sec_table[loop].va); 652 #endif 653 for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_S_SIZE) 654 pmap_map_section(l1pagetable, 655 l1_sec_table[loop].va + sz, 656 l1_sec_table[loop].pa + sz, 657 l1_sec_table[loop].prot, 658 l1_sec_table[loop].cache); 659 ++loop; 660 } 661 662 /* 663 * Map the PCI I/O spaces and i80321 registers. These are too 664 * small to be mapped w/ section mappings. 665 */ 666 #ifdef VERBOSE_INIT_ARM 667 printf("Mapping IOW 0x%08lx -> 0x%08lx @ 0x%08lx\n", 668 VERDE_OUT_XLATE_IO_WIN0_BASE, 669 VERDE_OUT_XLATE_IO_WIN0_BASE + VERDE_OUT_XLATE_IO_WIN_SIZE - 1, 670 IQ80321_IOW_VBASE); 671 #endif 672 pmap_map_chunk(l1pagetable, IQ80321_IOW_VBASE, 673 VERDE_OUT_XLATE_IO_WIN0_BASE, VERDE_OUT_XLATE_IO_WIN_SIZE, 674 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 675 676 #ifdef VERBOSE_INIT_ARM 677 printf("Mapping 80321 0x%08lx -> 0x%08lx @ 0x%08lx\n", 678 VERDE_PMMR_BASE, 679 VERDE_PMMR_BASE + VERDE_PMMR_SIZE - 1, 680 IQ80321_80321_VBASE); 681 #endif 682 pmap_map_chunk(l1pagetable, IQ80321_80321_VBASE, 683 VERDE_PMMR_BASE, VERDE_PMMR_SIZE, 684 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 685 686 /* 687 * Give the XScale global cache clean code an appropriately 688 * sized chunk of unmapped VA space starting at 0xff000000 689 * (our device mappings end before this address). 690 */ 691 xscale_cache_clean_addr = 0xff000000U; 692 693 /* 694 * Now we have the real page tables in place so we can switch to them. 695 * Once this is done we will be running with the REAL kernel page 696 * tables. 697 */ 698 699 /* 700 * Update the physical_freestart/physical_freeend/free_pages 701 * variables. 702 */ 703 { 704 extern char _end[]; 705 706 physical_freestart = physical_start + 707 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 708 KERNEL_BASE); 709 physical_freeend = physical_end; 710 free_pages = (physical_freeend - physical_freestart) / NBPG; 711 } 712 713 /* Switch tables */ 714 #ifdef VERBOSE_INIT_ARM 715 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 716 physical_freestart, free_pages, free_pages); 717 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 718 #endif 719 setttb(kernel_l1pt.pv_pa); 720 cpu_tlb_flushID(); 721 722 #ifdef VERBOSE_INIT_ARM 723 printf("done!\n"); 724 #endif 725 726 #ifdef VERBOSE_INIT_ARM 727 printf("bootstrap done.\n"); 728 #endif 729 730 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 731 732 /* 733 * Pages were allocated during the secondary bootstrap for the 734 * stacks for different CPU modes. 735 * We must now set the r13 registers in the different CPU modes to 736 * point to these stacks. 737 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 738 * of the stack memory. 739 */ 740 printf("init subsystems: stacks "); 741 742 set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * NBPG); 743 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * NBPG); 744 set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * NBPG); 745 746 /* 747 * Well we should set a data abort handler. 748 * Once things get going this will change as we will need a proper 749 * handler. 750 * Until then we will use a handler that just panics but tells us 751 * why. 752 * Initialisation of the vectors will just panic on a data abort. 753 * This just fills in a slighly better one. 754 */ 755 printf("vectors "); 756 data_abort_handler_address = (u_int)data_abort_handler; 757 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 758 undefined_handler_address = (u_int)undefinedinstruction_bounce; 759 760 /* Initialise the undefined instruction handlers */ 761 printf("undefined "); 762 undefined_init(); 763 764 /* Boot strap pmap telling it where the kernel page table is */ 765 printf("pmap "); 766 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, kernel_ptpt); 767 768 /* Setup the IRQ system */ 769 printf("irq "); 770 i80321_intr_init(); 771 printf("done.\n"); 772 773 #ifdef IPKDB 774 /* Initialise ipkdb */ 775 ipkdb_init(); 776 if (boothowto & RB_KDB) 777 ipkdb_connect(0); 778 #endif 779 780 #ifdef DDB 781 db_machine_init(); 782 783 /* Firmware doesn't load symbols. */ 784 ddb_init(0, NULL, NULL); 785 786 if (boothowto & RB_KDB) 787 Debugger(); 788 #endif 789 790 /* We return the new stack pointer address */ 791 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 792 } 793 794 void 795 consinit(void) 796 { 797 static const bus_addr_t comcnaddrs[] = { 798 IQ80321_UART1, /* com0 */ 799 }; 800 static int consinit_called; 801 802 if (consinit_called != 0) 803 return; 804 805 consinit_called = 1; 806 807 #if NCOM > 0 808 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 809 COM_FREQ, comcnmode)) 810 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 811 #else 812 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 813 #endif 814 } 815