1 /* $NetBSD: brh_machdep.c,v 1.38 2011/07/01 20:38:16 dyoung Exp $ */ 2 3 /* 4 * Copyright (c) 2001, 2002, 2003 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 dependent functions for kernel setup for the ADI Engineering 72 * BRH i80200 evaluation platform. 73 */ 74 75 #include <sys/cdefs.h> 76 __KERNEL_RCSID(0, "$NetBSD: brh_machdep.c,v 1.38 2011/07/01 20:38:16 dyoung Exp $"); 77 78 #include "opt_ddb.h" 79 #include "opt_pmap_debug.h" 80 81 #include <sys/param.h> 82 #include <sys/device.h> 83 #include <sys/systm.h> 84 #include <sys/kernel.h> 85 #include <sys/exec.h> 86 #include <sys/proc.h> 87 #include <sys/msgbuf.h> 88 #include <sys/reboot.h> 89 #include <sys/termios.h> 90 #include <sys/ksyms.h> 91 92 #include <uvm/uvm_extern.h> 93 94 #include <dev/cons.h> 95 96 #include <machine/db_machdep.h> 97 #include <ddb/db_sym.h> 98 #include <ddb/db_extern.h> 99 100 #include <machine/bootconfig.h> 101 #include <sys/bus.h> 102 #include <machine/cpu.h> 103 #include <machine/frame.h> 104 #include <arm/undefined.h> 105 106 #include <arm/arm32/machdep.h> 107 108 #include <arm/xscale/i80200reg.h> 109 #include <arm/xscale/i80200var.h> 110 111 #include <dev/pci/ppbreg.h> 112 113 #include <arm/xscale/beccreg.h> 114 #include <arm/xscale/beccvar.h> 115 116 #include <evbarm/adi_brh/brhreg.h> 117 #include <evbarm/adi_brh/brhvar.h> 118 #include <evbarm/adi_brh/obiovar.h> 119 120 #include "ksyms.h" 121 122 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 123 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 124 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 125 126 /* 127 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 128 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 129 */ 130 #define KERNEL_VM_SIZE 0x0C000000 131 132 /* 133 * Address to call from cpu_reset() to reset the machine. 134 * This is machine architecture dependent as it varies depending 135 * on where the ROM appears when you turn the MMU off. 136 */ 137 138 u_int cpu_reset_address = 0x00000000; 139 140 /* Define various stack sizes in pages */ 141 #define IRQ_STACK_SIZE 1 142 #define ABT_STACK_SIZE 1 143 #define UND_STACK_SIZE 1 144 145 BootConfig bootconfig; /* Boot config storage */ 146 char *boot_args = NULL; 147 char *boot_file = NULL; 148 149 vm_offset_t physical_start; 150 vm_offset_t physical_freestart; 151 vm_offset_t physical_freeend; 152 vm_offset_t physical_end; 153 u_int free_pages; 154 155 /*int debug_flags;*/ 156 #ifndef PMAP_STATIC_L1S 157 int max_processes = 64; /* Default number */ 158 #endif /* !PMAP_STATIC_L1S */ 159 160 /* Physical and virtual addresses for some global pages */ 161 pv_addr_t irqstack; 162 pv_addr_t undstack; 163 pv_addr_t abtstack; 164 pv_addr_t kernelstack; 165 pv_addr_t minidataclean; 166 167 vm_offset_t msgbufphys; 168 169 extern u_int data_abort_handler_address; 170 extern u_int prefetch_abort_handler_address; 171 extern u_int undefined_handler_address; 172 173 #ifdef PMAP_DEBUG 174 extern int pmap_debug_level; 175 #endif 176 177 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 178 179 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 180 #define KERNEL_PT_KERNEL_NUM 2 181 182 /* L2 tables for mapping kernel VM */ 183 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 184 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 185 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 186 187 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 188 189 /* Prototypes */ 190 191 void consinit(void); 192 193 #include "com.h" 194 #if NCOM > 0 195 #include <dev/ic/comreg.h> 196 #include <dev/ic/comvar.h> 197 #endif 198 199 /* 200 * Define the default console speed for the board. This is generally 201 * what the firmware provided with the board defaults to. 202 */ 203 #ifndef CONSPEED 204 #define CONSPEED B57600 205 #endif /* ! CONSPEED */ 206 207 #ifndef CONUNIT 208 #define CONUNIT 0 209 #endif 210 211 #ifndef CONMODE 212 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 213 #endif 214 215 int comcnspeed = CONSPEED; 216 int comcnmode = CONMODE; 217 int comcnunit = CONUNIT; 218 219 /* 220 * void cpu_reboot(int howto, char *bootstr) 221 * 222 * Reboots the system 223 * 224 * Deal with any syncing, unmounting, dumping and shutdown hooks, 225 * then reset the CPU. 226 */ 227 void 228 cpu_reboot(int howto, char *bootstr) 229 { 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 pmf_system_shutdown(boothowto); 238 printf("The operating system has halted.\n"); 239 printf("Please press any key to reboot.\n\n"); 240 cngetc(); 241 printf("rebooting...\n"); 242 goto reset; 243 } 244 245 /* Disable console buffering */ 246 247 /* 248 * If RB_NOSYNC was not specified sync the discs. 249 * Note: Unless cold is set to 1 here, syslogd will die during the 250 * unmount. It looks like syslogd is getting woken up only to find 251 * that it cannot page part of the binary in as the filesystem has 252 * been unmounted. 253 */ 254 if (!(howto & RB_NOSYNC)) 255 bootsync(); 256 257 /* Say NO to interrupts */ 258 splhigh(); 259 260 /* Do a dump if requested. */ 261 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 262 dumpsys(); 263 264 /* Run any shutdown hooks */ 265 doshutdownhooks(); 266 267 pmf_system_shutdown(boothowto); 268 269 /* Make sure IRQ's are disabled */ 270 IRQdisable; 271 272 if (howto & RB_HALT) { 273 brh_7seg('8'); 274 printf("The operating system has halted.\n"); 275 printf("Please press any key to reboot.\n\n"); 276 cngetc(); 277 } 278 279 printf("rebooting...\n\r"); 280 reset: 281 cpu_reset(); 282 } 283 284 /* Static device mappings. */ 285 static const struct pmap_devmap brh_devmap[] = { 286 { 287 BRH_PCI_CONF_VBASE, 288 BECC_PCI_CONF_BASE, 289 BRH_PCI_CONF_VSIZE, 290 VM_PROT_READ|VM_PROT_WRITE, 291 PTE_NOCACHE, 292 }, 293 { 294 BRH_PCI_MEM1_VBASE, 295 BECC_PCI_MEM1_BASE, 296 BRH_PCI_MEM1_VSIZE, 297 VM_PROT_READ|VM_PROT_WRITE, 298 PTE_NOCACHE, 299 }, 300 { 301 BRH_PCI_MEM2_VBASE, 302 BECC_PCI_MEM2_BASE, 303 BRH_PCI_MEM2_VSIZE, 304 VM_PROT_READ|VM_PROT_WRITE, 305 PTE_NOCACHE, 306 }, 307 { 308 BRH_UART1_VBASE, 309 BRH_UART1_BASE, 310 BRH_UART1_VSIZE, 311 VM_PROT_READ|VM_PROT_WRITE, 312 PTE_NOCACHE, 313 }, 314 { 315 BRH_UART2_VBASE, 316 BRH_UART2_BASE, 317 BRH_UART2_VSIZE, 318 VM_PROT_READ|VM_PROT_WRITE, 319 PTE_NOCACHE, 320 }, 321 { 322 BRH_LED_VBASE, 323 BRH_LED_BASE, 324 BRH_LED_VSIZE, 325 VM_PROT_READ|VM_PROT_WRITE, 326 PTE_NOCACHE, 327 }, 328 { 329 BRH_PCI_IO_VBASE, 330 BECC_PCI_IO_BASE, 331 BRH_PCI_IO_VSIZE, 332 VM_PROT_READ|VM_PROT_WRITE, 333 PTE_NOCACHE, 334 }, 335 { 336 BRH_BECC_VBASE, 337 BECC_REG_BASE, 338 BRH_BECC_VSIZE, 339 VM_PROT_READ|VM_PROT_WRITE, 340 PTE_NOCACHE, 341 }, 342 { 343 0, 344 0, 345 0, 346 0, 347 0, 348 } 349 }; 350 351 static void 352 brh_hardclock_hook(void) 353 { 354 static int snakefreq; 355 356 if ((snakefreq++ & 15) == 0) 357 brh_7seg_snake(); 358 } 359 360 /* 361 * u_int initarm(...) 362 * 363 * Initial entry point on startup. This gets called before main() is 364 * entered. 365 * It should be responsible for setting up everything that must be 366 * in place when main is called. 367 * This includes 368 * Taking a copy of the boot configuration structure. 369 * Initialising the physical console so characters can be printed. 370 * Setting up page tables for the kernel 371 * Relocating the kernel to the bottom of physical memory 372 */ 373 u_int 374 initarm(void *arg) 375 { 376 extern vaddr_t xscale_cache_clean_addr; 377 #ifdef DIAGNOSTIC 378 extern vsize_t xscale_minidata_clean_size; 379 #endif 380 int loop; 381 int loop1; 382 u_int l1pagetable; 383 paddr_t memstart; 384 psize_t memsize; 385 386 /* 387 * Clear out the 7-segment display. Whee, the first visual 388 * indication that we're running kernel code. 389 */ 390 brh_7seg(' '); 391 392 /* 393 * Since we have mapped the on-board devices at their permanent 394 * locations already, it is possible for us to initialize 395 * the console now. 396 */ 397 consinit(); 398 399 #ifdef VERBOSE_INIT_ARM 400 /* Talk to the user */ 401 printf("\nNetBSD/evbarm (ADI BRH) booting ...\n"); 402 #endif 403 404 /* Calibrate the delay loop. */ 405 becc_hardclock_hook = brh_hardclock_hook; 406 407 /* 408 * Heads up ... Setup the CPU / MMU / TLB functions 409 */ 410 if (set_cpufuncs()) 411 panic("CPU not recognized!"); 412 413 /* 414 * We are currently running with the MMU enabled and the 415 * entire address space mapped VA==PA. Memory conveniently 416 * starts at 0xc0000000, which is where we want it. Certain 417 * on-board devices have already been mapped where we want 418 * them to be. There is an L1 page table at 0xc0004000. 419 */ 420 421 becc_icu_init(); 422 423 /* 424 * Memory always starts at 0xc0000000 on a BRH, and the 425 * memory size is always 128M. 426 */ 427 memstart = 0xc0000000UL; 428 memsize = (128UL * 1024 * 1024); 429 430 #ifdef VERBOSE_INIT_ARM 431 printf("initarm: Configuring system ...\n"); 432 #endif 433 434 /* Fake bootconfig structure for the benefit of pmap.c */ 435 /* XXX must make the memory description h/w independent */ 436 bootconfig.dramblocks = 1; 437 bootconfig.dram[0].address = memstart; 438 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 439 440 /* 441 * Set up the variables that define the availablilty of 442 * physical memory. For now, we're going to set 443 * physical_freestart to 0xc0200000 (where the kernel 444 * was loaded), and allocate the memory we need downwards. 445 * If we get too close to the L1 table that we set up, we 446 * will panic. We will update physical_freestart and 447 * physical_freeend later to reflect what pmap_bootstrap() 448 * wants to see. 449 * 450 * XXX pmap_bootstrap() needs an enema. 451 */ 452 physical_start = bootconfig.dram[0].address; 453 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 454 455 physical_freestart = 0xc0009000UL; 456 physical_freeend = 0xc0200000UL; 457 458 #ifdef VERBOSE_INIT_ARM 459 /* Tell the user about the memory */ 460 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 461 physical_start, physical_end - 1); 462 #endif 463 464 /* 465 * Okay, the kernel starts 2MB in from the bottom of physical 466 * memory. We are going to allocate our bootstrap pages downwards 467 * from there. 468 * 469 * We need to allocate some fixed page tables to get the kernel 470 * going. We allocate one page directory and a number of page 471 * tables and store the physical addresses in the kernel_pt_table 472 * array. 473 * 474 * The kernel page directory must be on a 16K boundary. The page 475 * tables must be on 4K boundaries. What we do is allocate the 476 * page directory on the first 16K boundary that we encounter, and 477 * the page tables on 4K boundaries otherwise. Since we allocate 478 * at least 3 L2 page tables, we are guaranteed to encounter at 479 * least one 16K aligned region. 480 */ 481 482 #ifdef VERBOSE_INIT_ARM 483 printf("Allocating page tables\n"); 484 #endif 485 486 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 487 488 #ifdef VERBOSE_INIT_ARM 489 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 490 physical_freestart, free_pages, free_pages); 491 #endif 492 493 /* Define a macro to simplify memory allocation */ 494 #define valloc_pages(var, np) \ 495 alloc_pages((var).pv_pa, (np)); \ 496 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 497 498 #define alloc_pages(var, np) \ 499 physical_freeend -= ((np) * PAGE_SIZE); \ 500 if (physical_freeend < physical_freestart) \ 501 panic("initarm: out of memory"); \ 502 (var) = physical_freeend; \ 503 free_pages -= (np); \ 504 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 505 506 loop1 = 0; 507 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 508 /* Are we 16KB aligned for an L1 ? */ 509 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 510 && kernel_l1pt.pv_pa == 0) { 511 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 512 } else { 513 valloc_pages(kernel_pt_table[loop1], 514 L2_TABLE_SIZE / PAGE_SIZE); 515 ++loop1; 516 } 517 } 518 519 /* This should never be able to happen but better confirm that. */ 520 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 521 panic("initarm: Failed to align the kernel page directory\n"); 522 523 /* 524 * Allocate a page for the system page mapped to V0x00000000 525 * This page will just contain the system vectors and can be 526 * shared by all processes. 527 */ 528 alloc_pages(systempage.pv_pa, 1); 529 530 /* Allocate stacks for all modes */ 531 valloc_pages(irqstack, IRQ_STACK_SIZE); 532 valloc_pages(abtstack, ABT_STACK_SIZE); 533 valloc_pages(undstack, UND_STACK_SIZE); 534 valloc_pages(kernelstack, UPAGES); 535 536 /* Allocate enough pages for cleaning the Mini-Data cache. */ 537 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 538 valloc_pages(minidataclean, 1); 539 540 #ifdef VERBOSE_INIT_ARM 541 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 542 irqstack.pv_va); 543 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 544 abtstack.pv_va); 545 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 546 undstack.pv_va); 547 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 548 kernelstack.pv_va); 549 #endif 550 551 /* 552 * XXX Defer this to later so that we can reclaim the memory 553 * XXX used by the RedBoot page tables. 554 */ 555 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 556 557 /* 558 * Ok we have allocated physical pages for the primary kernel 559 * page tables 560 */ 561 562 #ifdef VERBOSE_INIT_ARM 563 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 564 #endif 565 566 /* 567 * Now we start construction of the L1 page table 568 * We start by mapping the L2 page tables into the L1. 569 * This means that we can replace L1 mappings later on if necessary 570 */ 571 l1pagetable = kernel_l1pt.pv_pa; 572 573 /* Map the L2 pages tables in the L1 page table */ 574 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 575 &kernel_pt_table[KERNEL_PT_SYS]); 576 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 577 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 578 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 579 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 580 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 581 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 582 583 /* update the top of the kernel VM */ 584 pmap_curmaxkvaddr = 585 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 586 587 #ifdef VERBOSE_INIT_ARM 588 printf("Mapping kernel\n"); 589 #endif 590 591 /* Now we fill in the L2 pagetable for the kernel static code/data */ 592 { 593 extern char etext[], _end[]; 594 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 595 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 596 u_int logical; 597 598 textsize = (textsize + PGOFSET) & ~PGOFSET; 599 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 600 601 logical = 0x00200000; /* offset of kernel in RAM */ 602 603 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 604 physical_start + logical, textsize, 605 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 606 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 607 physical_start + logical, totalsize - textsize, 608 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 609 } 610 611 #ifdef VERBOSE_INIT_ARM 612 printf("Constructing L2 page tables\n"); 613 #endif 614 615 /* Map the stack pages */ 616 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 617 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 618 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 619 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 620 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 621 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 622 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 623 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 624 625 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 626 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 627 628 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 629 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 630 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 631 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 632 } 633 634 /* Map the Mini-Data cache clean area. */ 635 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 636 minidataclean.pv_pa); 637 638 /* Map the vector page. */ 639 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 640 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 641 642 /* Map the statically mapped devices. */ 643 pmap_devmap_bootstrap(l1pagetable, brh_devmap); 644 645 /* 646 * Give the XScale global cache clean code an appropriately 647 * sized chunk of unmapped VA space starting at 0xff500000 648 * (our device mappings end before this address). 649 */ 650 xscale_cache_clean_addr = 0xff500000U; 651 652 /* 653 * Now we have the real page tables in place so we can switch to them. 654 * Once this is done we will be running with the REAL kernel page 655 * tables. 656 */ 657 658 /* Switch tables */ 659 #ifdef VERBOSE_INIT_ARM 660 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 661 #endif 662 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 663 cpu_setttb(kernel_l1pt.pv_pa); 664 cpu_tlb_flushID(); 665 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 666 667 /* 668 * Move from cpu_startup() as data_abort_handler() references 669 * this during uvm init 670 */ 671 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 672 673 #ifdef VERBOSE_INIT_ARM 674 printf("done!\n"); 675 #endif 676 677 #ifdef VERBOSE_INIT_ARM 678 printf("bootstrap done.\n"); 679 #endif 680 681 /* 682 * Inform the BECC code where the BECC is mapped. 683 */ 684 becc_vaddr = BRH_BECC_VBASE; 685 686 /* 687 * Now that we have becc_vaddr set, calibrate delay. 688 */ 689 becc_calibrate_delay(); 690 691 /* 692 * BECC <= Rev7 can only address 64M through the inbound 693 * PCI windows. Limit memory to 64M on those revs. (This 694 * problem was fixed in Rev8 of the BECC; get an FPGA upgrade.) 695 */ 696 { 697 vaddr_t va = BRH_PCI_CONF_VBASE | (1U << BECC_IDSEL_BIT) | 698 PCI_CLASS_REG; 699 uint32_t reg; 700 701 reg = *(volatile uint32_t *) va; 702 becc_rev = PCI_REVISION(reg); 703 if (becc_rev <= BECC_REV_V7 && 704 memsize > (64UL * 1024 * 1024)) { 705 memsize = (64UL * 1024 * 1024); 706 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 707 physical_end = physical_start + 708 (bootconfig.dram[0].pages * PAGE_SIZE); 709 printf("BECC <= Rev7: memory truncated to 64M\n"); 710 } 711 } 712 713 /* 714 * Update the physical_freestart/physical_freeend/free_pages 715 * variables. 716 */ 717 { 718 extern char _end[]; 719 720 physical_freestart = physical_start + 721 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 722 KERNEL_BASE); 723 physical_freeend = physical_end; 724 free_pages = 725 (physical_freeend - physical_freestart) / PAGE_SIZE; 726 } 727 #ifdef VERBOSE_INIT_ARM 728 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 729 physical_freestart, free_pages, free_pages); 730 #endif 731 732 physmem = (physical_end - physical_start) / PAGE_SIZE; 733 734 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 735 736 /* 737 * Pages were allocated during the secondary bootstrap for the 738 * stacks for different CPU modes. 739 * We must now set the r13 registers in the different CPU modes to 740 * point to these stacks. 741 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 742 * of the stack memory. 743 */ 744 #ifdef VERBOSE_INIT_ARM 745 printf("init subsystems: stacks "); 746 #endif 747 748 set_stackptr(PSR_IRQ32_MODE, 749 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 750 set_stackptr(PSR_ABT32_MODE, 751 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 752 set_stackptr(PSR_UND32_MODE, 753 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 754 755 /* 756 * Well we should set a data abort handler. 757 * Once things get going this will change as we will need a proper 758 * handler. 759 * Until then we will use a handler that just panics but tells us 760 * why. 761 * Initialisation of the vectors will just panic on a data abort. 762 * This just fills in a slightly better one. 763 */ 764 #ifdef VERBOSE_INIT_ARM 765 printf("vectors "); 766 #endif 767 data_abort_handler_address = (u_int)data_abort_handler; 768 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 769 undefined_handler_address = (u_int)undefinedinstruction_bounce; 770 771 /* Initialise the undefined instruction handlers */ 772 #ifdef VERBOSE_INIT_ARM 773 printf("undefined "); 774 #endif 775 undefined_init(); 776 777 /* Load memory into UVM. */ 778 #ifdef VERBOSE_INIT_ARM 779 printf("page "); 780 #endif 781 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 782 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 783 atop(physical_freestart), atop(physical_freeend), 784 VM_FREELIST_DEFAULT); 785 786 /* Boot strap pmap telling it where the kernel page table is */ 787 #ifdef VERBOSE_INIT_ARM 788 printf("pmap "); 789 #endif 790 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 791 792 /* Setup the IRQ system */ 793 #ifdef VERBOSE_INIT_ARM 794 printf("irq "); 795 #endif 796 becc_intr_init(); 797 #ifdef VERBOSE_INIT_ARM 798 printf("done.\n"); 799 #endif 800 801 #ifdef DDB 802 db_machine_init(); 803 if (boothowto & RB_KDB) 804 Debugger(); 805 #endif 806 807 /* We return the new stack pointer address */ 808 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 809 } 810 811 void 812 consinit(void) 813 { 814 static const bus_addr_t comcnaddrs[] = { 815 BRH_UART1_BASE, /* com0 */ 816 BRH_UART2_BASE, /* com1 */ 817 }; 818 static int consinit_called; 819 820 if (consinit_called != 0) 821 return; 822 823 consinit_called = 1; 824 825 /* 826 * brh_start() has mapped the console devices for us per 827 * the devmap, so register it now so drivers can map the 828 * console device. 829 */ 830 pmap_devmap_register(brh_devmap); 831 832 #if NCOM > 0 833 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 834 BECC_PERIPH_CLOCK, COM_TYPE_NORMAL, comcnmode)) 835 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 836 #else 837 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 838 #endif 839 } 840