1 /* $NetBSD: brh_machdep.c,v 1.42 2013/08/18 15:58:20 matt 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 1.42 2013/08/18 15:58:20 matt 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 #include <sys/bus.h> 92 #include <sys/cpu.h> 93 94 #include <uvm/uvm_extern.h> 95 96 #include <dev/cons.h> 97 98 #include <machine/db_machdep.h> 99 #include <ddb/db_sym.h> 100 #include <ddb/db_extern.h> 101 102 #include <machine/bootconfig.h> 103 #include <arm/locore.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 BootConfig bootconfig; /* Boot config storage */ 133 char *boot_args = NULL; 134 char *boot_file = NULL; 135 136 vm_offset_t physical_start; 137 vm_offset_t physical_freestart; 138 vm_offset_t physical_freeend; 139 vm_offset_t physical_end; 140 u_int free_pages; 141 142 /*int debug_flags;*/ 143 #ifndef PMAP_STATIC_L1S 144 int max_processes = 64; /* Default number */ 145 #endif /* !PMAP_STATIC_L1S */ 146 147 /* Physical and virtual addresses for some global pages */ 148 pv_addr_t minidataclean; 149 150 vm_offset_t msgbufphys; 151 152 #ifdef PMAP_DEBUG 153 extern int pmap_debug_level; 154 #endif 155 156 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 157 158 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 159 #define KERNEL_PT_KERNEL_NUM 2 160 161 /* L2 tables for mapping kernel VM */ 162 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 163 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 164 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 165 166 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 167 168 /* Prototypes */ 169 170 void consinit(void); 171 172 #include "com.h" 173 #if NCOM > 0 174 #include <dev/ic/comreg.h> 175 #include <dev/ic/comvar.h> 176 #endif 177 178 /* 179 * Define the default console speed for the board. This is generally 180 * what the firmware provided with the board defaults to. 181 */ 182 #ifndef CONSPEED 183 #define CONSPEED B57600 184 #endif /* ! CONSPEED */ 185 186 #ifndef CONUNIT 187 #define CONUNIT 0 188 #endif 189 190 #ifndef CONMODE 191 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 192 #endif 193 194 int comcnspeed = CONSPEED; 195 int comcnmode = CONMODE; 196 int comcnunit = CONUNIT; 197 198 /* 199 * void cpu_reboot(int howto, char *bootstr) 200 * 201 * Reboots the system 202 * 203 * Deal with any syncing, unmounting, dumping and shutdown hooks, 204 * then reset the CPU. 205 */ 206 void 207 cpu_reboot(int howto, char *bootstr) 208 { 209 210 /* 211 * If we are still cold then hit the air brakes 212 * and crash to earth fast 213 */ 214 if (cold) { 215 doshutdownhooks(); 216 pmf_system_shutdown(boothowto); 217 printf("The operating system has halted.\n"); 218 printf("Please press any key to reboot.\n\n"); 219 cngetc(); 220 printf("rebooting...\n"); 221 goto reset; 222 } 223 224 /* Disable console buffering */ 225 226 /* 227 * If RB_NOSYNC was not specified sync the discs. 228 * Note: Unless cold is set to 1 here, syslogd will die during the 229 * unmount. It looks like syslogd is getting woken up only to find 230 * that it cannot page part of the binary in as the filesystem has 231 * been unmounted. 232 */ 233 if (!(howto & RB_NOSYNC)) 234 bootsync(); 235 236 /* Say NO to interrupts */ 237 splhigh(); 238 239 /* Do a dump if requested. */ 240 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 241 dumpsys(); 242 243 /* Run any shutdown hooks */ 244 doshutdownhooks(); 245 246 pmf_system_shutdown(boothowto); 247 248 /* Make sure IRQ's are disabled */ 249 IRQdisable; 250 251 if (howto & RB_HALT) { 252 brh_7seg('8'); 253 printf("The operating system has halted.\n"); 254 printf("Please press any key to reboot.\n\n"); 255 cngetc(); 256 } 257 258 printf("rebooting...\n\r"); 259 reset: 260 cpu_reset(); 261 } 262 263 /* Static device mappings. */ 264 static const struct pmap_devmap brh_devmap[] = { 265 { 266 BRH_PCI_CONF_VBASE, 267 BECC_PCI_CONF_BASE, 268 BRH_PCI_CONF_VSIZE, 269 VM_PROT_READ|VM_PROT_WRITE, 270 PTE_NOCACHE, 271 }, 272 { 273 BRH_PCI_MEM1_VBASE, 274 BECC_PCI_MEM1_BASE, 275 BRH_PCI_MEM1_VSIZE, 276 VM_PROT_READ|VM_PROT_WRITE, 277 PTE_NOCACHE, 278 }, 279 { 280 BRH_PCI_MEM2_VBASE, 281 BECC_PCI_MEM2_BASE, 282 BRH_PCI_MEM2_VSIZE, 283 VM_PROT_READ|VM_PROT_WRITE, 284 PTE_NOCACHE, 285 }, 286 { 287 BRH_UART1_VBASE, 288 BRH_UART1_BASE, 289 BRH_UART1_VSIZE, 290 VM_PROT_READ|VM_PROT_WRITE, 291 PTE_NOCACHE, 292 }, 293 { 294 BRH_UART2_VBASE, 295 BRH_UART2_BASE, 296 BRH_UART2_VSIZE, 297 VM_PROT_READ|VM_PROT_WRITE, 298 PTE_NOCACHE, 299 }, 300 { 301 BRH_LED_VBASE, 302 BRH_LED_BASE, 303 BRH_LED_VSIZE, 304 VM_PROT_READ|VM_PROT_WRITE, 305 PTE_NOCACHE, 306 }, 307 { 308 BRH_PCI_IO_VBASE, 309 BECC_PCI_IO_BASE, 310 BRH_PCI_IO_VSIZE, 311 VM_PROT_READ|VM_PROT_WRITE, 312 PTE_NOCACHE, 313 }, 314 { 315 BRH_BECC_VBASE, 316 BECC_REG_BASE, 317 BRH_BECC_VSIZE, 318 VM_PROT_READ|VM_PROT_WRITE, 319 PTE_NOCACHE, 320 }, 321 { 322 0, 323 0, 324 0, 325 0, 326 0, 327 } 328 }; 329 330 static void 331 brh_hardclock_hook(void) 332 { 333 static int snakefreq; 334 335 if ((snakefreq++ & 15) == 0) 336 brh_7seg_snake(); 337 } 338 339 /* 340 * u_int initarm(...) 341 * 342 * Initial entry point on startup. This gets called before main() is 343 * entered. 344 * It should be responsible for setting up everything that must be 345 * in place when main is called. 346 * This includes 347 * Taking a copy of the boot configuration structure. 348 * Initialising the physical console so characters can be printed. 349 * Setting up page tables for the kernel 350 * Relocating the kernel to the bottom of physical memory 351 */ 352 u_int 353 initarm(void *arg) 354 { 355 extern vaddr_t xscale_cache_clean_addr; 356 #ifdef DIAGNOSTIC 357 extern vsize_t xscale_minidata_clean_size; 358 #endif 359 int loop; 360 int loop1; 361 u_int l1pagetable; 362 paddr_t memstart; 363 psize_t memsize; 364 365 /* 366 * Clear out the 7-segment display. Whee, the first visual 367 * indication that we're running kernel code. 368 */ 369 brh_7seg(' '); 370 371 /* 372 * Since we have mapped the on-board devices at their permanent 373 * locations already, it is possible for us to initialize 374 * the console now. 375 */ 376 consinit(); 377 378 #ifdef VERBOSE_INIT_ARM 379 /* Talk to the user */ 380 printf("\nNetBSD/evbarm (ADI BRH) booting ...\n"); 381 #endif 382 383 /* Calibrate the delay loop. */ 384 becc_hardclock_hook = brh_hardclock_hook; 385 386 /* 387 * Heads up ... Setup the CPU / MMU / TLB functions 388 */ 389 if (set_cpufuncs()) 390 panic("CPU not recognized!"); 391 392 /* 393 * We are currently running with the MMU enabled and the 394 * entire address space mapped VA==PA. Memory conveniently 395 * starts at 0xc0000000, which is where we want it. Certain 396 * on-board devices have already been mapped where we want 397 * them to be. There is an L1 page table at 0xc0004000. 398 */ 399 400 becc_icu_init(); 401 402 /* 403 * Memory always starts at 0xc0000000 on a BRH, and the 404 * memory size is always 128M. 405 */ 406 memstart = 0xc0000000UL; 407 memsize = (128UL * 1024 * 1024); 408 409 #ifdef VERBOSE_INIT_ARM 410 printf("initarm: Configuring system ...\n"); 411 #endif 412 413 /* Fake bootconfig structure for the benefit of pmap.c */ 414 /* XXX must make the memory description h/w independent */ 415 bootconfig.dramblocks = 1; 416 bootconfig.dram[0].address = memstart; 417 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 418 419 /* 420 * Set up the variables that define the availablilty of 421 * physical memory. For now, we're going to set 422 * physical_freestart to 0xc0200000 (where the kernel 423 * was loaded), and allocate the memory we need downwards. 424 * If we get too close to the L1 table that we set up, we 425 * will panic. We will update physical_freestart and 426 * physical_freeend later to reflect what pmap_bootstrap() 427 * wants to see. 428 * 429 * XXX pmap_bootstrap() needs an enema. 430 */ 431 physical_start = bootconfig.dram[0].address; 432 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 433 434 physical_freestart = 0xc0009000UL; 435 physical_freeend = 0xc0200000UL; 436 437 #ifdef VERBOSE_INIT_ARM 438 /* Tell the user about the memory */ 439 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 440 physical_start, physical_end - 1); 441 #endif 442 443 /* 444 * Okay, the kernel starts 2MB in from the bottom of physical 445 * memory. We are going to allocate our bootstrap pages downwards 446 * from there. 447 * 448 * We need to allocate some fixed page tables to get the kernel 449 * going. We allocate one page directory and a number of page 450 * tables and store the physical addresses in the kernel_pt_table 451 * array. 452 * 453 * The kernel page directory must be on a 16K boundary. The page 454 * tables must be on 4K boundaries. What we do is allocate the 455 * page directory on the first 16K boundary that we encounter, and 456 * the page tables on 4K boundaries otherwise. Since we allocate 457 * at least 3 L2 page tables, we are guaranteed to encounter at 458 * least one 16K aligned region. 459 */ 460 461 #ifdef VERBOSE_INIT_ARM 462 printf("Allocating page tables\n"); 463 #endif 464 465 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 466 467 #ifdef VERBOSE_INIT_ARM 468 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 469 physical_freestart, free_pages, free_pages); 470 #endif 471 472 /* Define a macro to simplify memory allocation */ 473 #define valloc_pages(var, np) \ 474 alloc_pages((var).pv_pa, (np)); \ 475 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 476 477 #define alloc_pages(var, np) \ 478 physical_freeend -= ((np) * PAGE_SIZE); \ 479 if (physical_freeend < physical_freestart) \ 480 panic("initarm: out of memory"); \ 481 (var) = physical_freeend; \ 482 free_pages -= (np); \ 483 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 484 485 loop1 = 0; 486 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 487 /* Are we 16KB aligned for an L1 ? */ 488 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 489 && kernel_l1pt.pv_pa == 0) { 490 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 491 } else { 492 valloc_pages(kernel_pt_table[loop1], 493 L2_TABLE_SIZE / PAGE_SIZE); 494 ++loop1; 495 } 496 } 497 498 /* This should never be able to happen but better confirm that. */ 499 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 500 panic("initarm: Failed to align the kernel page directory\n"); 501 502 /* 503 * Allocate a page for the system page mapped to V0x00000000 504 * This page will just contain the system vectors and can be 505 * shared by all processes. 506 */ 507 alloc_pages(systempage.pv_pa, 1); 508 509 /* Allocate stacks for all modes */ 510 valloc_pages(irqstack, IRQ_STACK_SIZE); 511 valloc_pages(abtstack, ABT_STACK_SIZE); 512 valloc_pages(undstack, UND_STACK_SIZE); 513 valloc_pages(kernelstack, UPAGES); 514 515 /* Allocate enough pages for cleaning the Mini-Data cache. */ 516 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 517 valloc_pages(minidataclean, 1); 518 519 #ifdef VERBOSE_INIT_ARM 520 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 521 irqstack.pv_va); 522 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 523 abtstack.pv_va); 524 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 525 undstack.pv_va); 526 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 527 kernelstack.pv_va); 528 #endif 529 530 /* 531 * XXX Defer this to later so that we can reclaim the memory 532 * XXX used by the RedBoot page tables. 533 */ 534 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 535 536 /* 537 * Ok we have allocated physical pages for the primary kernel 538 * page tables 539 */ 540 541 #ifdef VERBOSE_INIT_ARM 542 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 543 #endif 544 545 /* 546 * Now we start construction of the L1 page table 547 * We start by mapping the L2 page tables into the L1. 548 * This means that we can replace L1 mappings later on if necessary 549 */ 550 l1pagetable = kernel_l1pt.pv_pa; 551 552 /* Map the L2 pages tables in the L1 page table */ 553 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 554 &kernel_pt_table[KERNEL_PT_SYS]); 555 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 556 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 557 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 558 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 559 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 560 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 561 562 /* update the top of the kernel VM */ 563 pmap_curmaxkvaddr = 564 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 565 566 #ifdef VERBOSE_INIT_ARM 567 printf("Mapping kernel\n"); 568 #endif 569 570 /* Now we fill in the L2 pagetable for the kernel static code/data */ 571 { 572 extern char etext[], _end[]; 573 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 574 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 575 u_int logical; 576 577 textsize = (textsize + PGOFSET) & ~PGOFSET; 578 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 579 580 logical = 0x00200000; /* offset of kernel in RAM */ 581 582 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 583 physical_start + logical, textsize, 584 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 585 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 586 physical_start + logical, totalsize - textsize, 587 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 588 } 589 590 #ifdef VERBOSE_INIT_ARM 591 printf("Constructing L2 page tables\n"); 592 #endif 593 594 /* Map the stack pages */ 595 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 596 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 597 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 598 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 599 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 600 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 601 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 602 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 603 604 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 605 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 606 607 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 608 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 609 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 610 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 611 } 612 613 /* Map the Mini-Data cache clean area. */ 614 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 615 minidataclean.pv_pa); 616 617 /* Map the vector page. */ 618 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 619 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 620 621 /* Map the statically mapped devices. */ 622 pmap_devmap_bootstrap(l1pagetable, brh_devmap); 623 624 /* 625 * Give the XScale global cache clean code an appropriately 626 * sized chunk of unmapped VA space starting at 0xff500000 627 * (our device mappings end before this address). 628 */ 629 xscale_cache_clean_addr = 0xff500000U; 630 631 /* 632 * Now we have the real page tables in place so we can switch to them. 633 * Once this is done we will be running with the REAL kernel page 634 * tables. 635 */ 636 637 /* Switch tables */ 638 #ifdef VERBOSE_INIT_ARM 639 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 640 #endif 641 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 642 cpu_setttb(kernel_l1pt.pv_pa, true); 643 cpu_tlb_flushID(); 644 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 645 646 /* 647 * Move from cpu_startup() as data_abort_handler() references 648 * this during uvm init 649 */ 650 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 651 652 #ifdef VERBOSE_INIT_ARM 653 printf("done!\n"); 654 #endif 655 656 #ifdef VERBOSE_INIT_ARM 657 printf("bootstrap done.\n"); 658 #endif 659 660 /* 661 * Inform the BECC code where the BECC is mapped. 662 */ 663 becc_vaddr = BRH_BECC_VBASE; 664 665 /* 666 * Now that we have becc_vaddr set, calibrate delay. 667 */ 668 becc_calibrate_delay(); 669 670 /* 671 * BECC <= Rev7 can only address 64M through the inbound 672 * PCI windows. Limit memory to 64M on those revs. (This 673 * problem was fixed in Rev8 of the BECC; get an FPGA upgrade.) 674 */ 675 { 676 vaddr_t va = BRH_PCI_CONF_VBASE | (1U << BECC_IDSEL_BIT) | 677 PCI_CLASS_REG; 678 uint32_t reg; 679 680 reg = *(volatile uint32_t *) va; 681 becc_rev = PCI_REVISION(reg); 682 if (becc_rev <= BECC_REV_V7 && 683 memsize > (64UL * 1024 * 1024)) { 684 memsize = (64UL * 1024 * 1024); 685 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 686 physical_end = physical_start + 687 (bootconfig.dram[0].pages * PAGE_SIZE); 688 printf("BECC <= Rev7: memory truncated to 64M\n"); 689 } 690 } 691 692 /* 693 * Update the physical_freestart/physical_freeend/free_pages 694 * variables. 695 */ 696 { 697 extern char _end[]; 698 699 physical_freestart = physical_start + 700 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 701 KERNEL_BASE); 702 physical_freeend = physical_end; 703 free_pages = 704 (physical_freeend - physical_freestart) / PAGE_SIZE; 705 } 706 #ifdef VERBOSE_INIT_ARM 707 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 708 physical_freestart, free_pages, free_pages); 709 #endif 710 711 physmem = (physical_end - physical_start) / PAGE_SIZE; 712 713 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 714 715 /* 716 * Pages were allocated during the secondary bootstrap for the 717 * stacks for different CPU modes. 718 * We must now set the r13 registers in the different CPU modes to 719 * point to these stacks. 720 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 721 * of the stack memory. 722 */ 723 #ifdef VERBOSE_INIT_ARM 724 printf("init subsystems: stacks "); 725 #endif 726 727 set_stackptr(PSR_IRQ32_MODE, 728 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 729 set_stackptr(PSR_ABT32_MODE, 730 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 731 set_stackptr(PSR_UND32_MODE, 732 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 733 734 /* 735 * Well we should set a data abort handler. 736 * Once things get going this will change as we will need a proper 737 * handler. 738 * Until then we will use a handler that just panics but tells us 739 * why. 740 * Initialisation of the vectors will just panic on a data abort. 741 * This just fills in a slightly better one. 742 */ 743 #ifdef VERBOSE_INIT_ARM 744 printf("vectors "); 745 #endif 746 data_abort_handler_address = (u_int)data_abort_handler; 747 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 748 undefined_handler_address = (u_int)undefinedinstruction_bounce; 749 750 /* Initialise the undefined instruction handlers */ 751 #ifdef VERBOSE_INIT_ARM 752 printf("undefined "); 753 #endif 754 undefined_init(); 755 756 /* Load memory into UVM. */ 757 #ifdef VERBOSE_INIT_ARM 758 printf("page "); 759 #endif 760 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 761 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 762 atop(physical_freestart), atop(physical_freeend), 763 VM_FREELIST_DEFAULT); 764 765 /* Boot strap pmap telling it where the kernel page table is */ 766 #ifdef VERBOSE_INIT_ARM 767 printf("pmap "); 768 #endif 769 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 770 771 /* Setup the IRQ system */ 772 #ifdef VERBOSE_INIT_ARM 773 printf("irq "); 774 #endif 775 becc_intr_init(); 776 #ifdef VERBOSE_INIT_ARM 777 printf("done.\n"); 778 #endif 779 780 #ifdef DDB 781 db_machine_init(); 782 if (boothowto & RB_KDB) 783 Debugger(); 784 #endif 785 786 /* We return the new stack pointer address */ 787 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 788 } 789 790 void 791 consinit(void) 792 { 793 static const bus_addr_t comcnaddrs[] = { 794 BRH_UART1_BASE, /* com0 */ 795 BRH_UART2_BASE, /* com1 */ 796 }; 797 static int consinit_called; 798 799 if (consinit_called != 0) 800 return; 801 802 consinit_called = 1; 803 804 /* 805 * brh_start() has mapped the console devices for us per 806 * the devmap, so register it now so drivers can map the 807 * console device. 808 */ 809 pmap_devmap_register(brh_devmap); 810 811 #if NCOM > 0 812 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 813 BECC_PERIPH_CLOCK, COM_TYPE_NORMAL, comcnmode)) 814 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 815 #else 816 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 817 #endif 818 } 819