1 /* $NetBSD: brh_machdep.c,v 1.50 2020/04/18 11:00:38 skrll 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 1.50 2020/04/18 11:00:38 skrll Exp $"); 77 78 #include "opt_arm_debug.h" 79 #include "opt_console.h" 80 #include "opt_ddb.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 #include <sys/bus.h> 93 #include <sys/cpu.h> 94 95 #include <uvm/uvm_extern.h> 96 97 #include <dev/cons.h> 98 99 #include <machine/db_machdep.h> 100 #include <ddb/db_sym.h> 101 #include <ddb/db_extern.h> 102 103 #include <machine/bootconfig.h> 104 #include <arm/locore.h> 105 #include <arm/undefined.h> 106 107 #include <arm/arm32/machdep.h> 108 109 #include <arm/xscale/i80200reg.h> 110 #include <arm/xscale/i80200var.h> 111 112 #include <dev/pci/ppbreg.h> 113 114 #include <arm/xscale/beccreg.h> 115 #include <arm/xscale/beccvar.h> 116 117 #include <evbarm/adi_brh/brhreg.h> 118 #include <evbarm/adi_brh/brhvar.h> 119 #include <evbarm/adi_brh/obiovar.h> 120 121 #include "ksyms.h" 122 123 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 124 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 125 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 126 127 /* 128 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 129 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 130 */ 131 #define KERNEL_VM_SIZE 0x0C000000 132 133 BootConfig bootconfig; /* Boot config storage */ 134 char *boot_args = NULL; 135 char *boot_file = NULL; 136 137 vaddr_t physical_start; 138 vaddr_t physical_freestart; 139 vaddr_t physical_freeend; 140 vaddr_t physical_end; 141 u_int free_pages; 142 143 /*int debug_flags;*/ 144 #ifndef PMAP_STATIC_L1S 145 int max_processes = 64; /* Default number */ 146 #endif /* !PMAP_STATIC_L1S */ 147 148 /* Physical and virtual addresses for some global pages */ 149 pv_addr_t minidataclean; 150 151 paddr_t msgbufphys; 152 153 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 154 155 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 156 #define KERNEL_PT_KERNEL_NUM 2 157 158 /* L2 tables for mapping kernel VM */ 159 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 160 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 161 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 162 163 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 164 165 /* Prototypes */ 166 167 void consinit(void); 168 169 #include "com.h" 170 #if NCOM > 0 171 #include <dev/ic/comreg.h> 172 #include <dev/ic/comvar.h> 173 #endif 174 175 /* 176 * Define the default console speed for the board. This is generally 177 * what the firmware provided with the board defaults to. 178 */ 179 #ifndef CONSPEED 180 #define CONSPEED B57600 181 #endif /* ! CONSPEED */ 182 183 #ifndef CONUNIT 184 #define CONUNIT 0 185 #endif 186 187 #ifndef CONMODE 188 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 189 #endif 190 191 int comcnspeed = CONSPEED; 192 int comcnmode = CONMODE; 193 int comcnunit = CONUNIT; 194 195 /* 196 * void cpu_reboot(int howto, char *bootstr) 197 * 198 * Reboots the system 199 * 200 * Deal with any syncing, unmounting, dumping and shutdown hooks, 201 * then reset the CPU. 202 */ 203 void 204 cpu_reboot(int howto, char *bootstr) 205 { 206 207 /* 208 * If we are still cold then hit the air brakes 209 * and crash to earth fast 210 */ 211 if (cold) { 212 doshutdownhooks(); 213 pmf_system_shutdown(boothowto); 214 printf("The operating system has halted.\n"); 215 printf("Please press any key to reboot.\n\n"); 216 cngetc(); 217 printf("rebooting...\n"); 218 goto reset; 219 } 220 221 /* Disable console buffering */ 222 223 /* 224 * If RB_NOSYNC was not specified sync the discs. 225 * Note: Unless cold is set to 1 here, syslogd will die during the 226 * unmount. It looks like syslogd is getting woken up only to find 227 * that it cannot page part of the binary in as the filesystem has 228 * been unmounted. 229 */ 230 if (!(howto & RB_NOSYNC)) 231 bootsync(); 232 233 /* Say NO to interrupts */ 234 splhigh(); 235 236 /* Do a dump if requested. */ 237 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 238 dumpsys(); 239 240 /* Run any shutdown hooks */ 241 doshutdownhooks(); 242 243 pmf_system_shutdown(boothowto); 244 245 /* Make sure IRQ's are disabled */ 246 IRQdisable; 247 248 if (howto & RB_HALT) { 249 brh_7seg('8'); 250 printf("The operating system has halted.\n"); 251 printf("Please press any key to reboot.\n\n"); 252 cngetc(); 253 } 254 255 printf("rebooting...\n\r"); 256 reset: 257 cpu_reset(); 258 } 259 260 /* Static device mappings. */ 261 static const struct pmap_devmap brh_devmap[] = { 262 { 263 BRH_PCI_CONF_VBASE, 264 BECC_PCI_CONF_BASE, 265 BRH_PCI_CONF_VSIZE, 266 VM_PROT_READ|VM_PROT_WRITE, 267 PTE_NOCACHE, 268 }, 269 { 270 BRH_PCI_MEM1_VBASE, 271 BECC_PCI_MEM1_BASE, 272 BRH_PCI_MEM1_VSIZE, 273 VM_PROT_READ|VM_PROT_WRITE, 274 PTE_NOCACHE, 275 }, 276 { 277 BRH_PCI_MEM2_VBASE, 278 BECC_PCI_MEM2_BASE, 279 BRH_PCI_MEM2_VSIZE, 280 VM_PROT_READ|VM_PROT_WRITE, 281 PTE_NOCACHE, 282 }, 283 { 284 BRH_UART1_VBASE, 285 BRH_UART1_BASE, 286 BRH_UART1_VSIZE, 287 VM_PROT_READ|VM_PROT_WRITE, 288 PTE_NOCACHE, 289 }, 290 { 291 BRH_UART2_VBASE, 292 BRH_UART2_BASE, 293 BRH_UART2_VSIZE, 294 VM_PROT_READ|VM_PROT_WRITE, 295 PTE_NOCACHE, 296 }, 297 { 298 BRH_LED_VBASE, 299 BRH_LED_BASE, 300 BRH_LED_VSIZE, 301 VM_PROT_READ|VM_PROT_WRITE, 302 PTE_NOCACHE, 303 }, 304 { 305 BRH_PCI_IO_VBASE, 306 BECC_PCI_IO_BASE, 307 BRH_PCI_IO_VSIZE, 308 VM_PROT_READ|VM_PROT_WRITE, 309 PTE_NOCACHE, 310 }, 311 { 312 BRH_BECC_VBASE, 313 BECC_REG_BASE, 314 BRH_BECC_VSIZE, 315 VM_PROT_READ|VM_PROT_WRITE, 316 PTE_NOCACHE, 317 }, 318 { 319 0, 320 0, 321 0, 322 0, 323 0, 324 } 325 }; 326 327 static void 328 brh_hardclock_hook(void) 329 { 330 static int snakefreq; 331 332 if ((snakefreq++ & 15) == 0) 333 brh_7seg_snake(); 334 } 335 336 /* 337 * vaddr_t initarm(...) 338 * 339 * Initial entry point on startup. This gets called before main() is 340 * entered. 341 * It should be responsible for setting up everything that must be 342 * in place when main is called. 343 * This includes 344 * Taking a copy of the boot configuration structure. 345 * Initialising the physical console so characters can be printed. 346 * Setting up page tables for the kernel 347 * Relocating the kernel to the bottom of physical memory 348 */ 349 vaddr_t 350 initarm(void *arg) 351 { 352 extern vaddr_t xscale_cache_clean_addr; 353 #ifdef DIAGNOSTIC 354 extern vsize_t xscale_minidata_clean_size; 355 #endif 356 int loop; 357 int loop1; 358 u_int l1pagetable; 359 paddr_t memstart; 360 psize_t memsize; 361 362 /* 363 * Clear out the 7-segment display. Whee, the first visual 364 * indication that we're running kernel code. 365 */ 366 brh_7seg(' '); 367 368 /* 369 * Since we have mapped the on-board devices at their permanent 370 * locations already, it is possible for us to initialize 371 * the console now. 372 */ 373 consinit(); 374 375 #ifdef VERBOSE_INIT_ARM 376 /* Talk to the user */ 377 printf("\nNetBSD/evbarm (ADI BRH) booting ...\n"); 378 #endif 379 380 /* Calibrate the delay loop. */ 381 becc_hardclock_hook = brh_hardclock_hook; 382 383 /* 384 * Heads up ... Setup the CPU / MMU / TLB functions 385 */ 386 if (set_cpufuncs()) 387 panic("CPU not recognized!"); 388 389 /* 390 * We are currently running with the MMU enabled and the 391 * entire address space mapped VA==PA. Memory conveniently 392 * starts at 0xc0000000, which is where we want it. Certain 393 * on-board devices have already been mapped where we want 394 * them to be. There is an L1 page table at 0xc0004000. 395 */ 396 397 becc_icu_init(); 398 399 /* 400 * Memory always starts at 0xc0000000 on a BRH, and the 401 * memory size is always 128M. 402 */ 403 memstart = 0xc0000000UL; 404 memsize = (128UL * 1024 * 1024); 405 406 #ifdef VERBOSE_INIT_ARM 407 printf("initarm: Configuring system ...\n"); 408 #endif 409 410 /* Fake bootconfig structure for the benefit of pmap.c */ 411 /* XXX must make the memory description h/w independent */ 412 bootconfig.dramblocks = 1; 413 bootconfig.dram[0].address = memstart; 414 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 415 416 /* 417 * Set up the variables that define the availablilty of 418 * physical memory. For now, we're going to set 419 * physical_freestart to 0xc0200000 (where the kernel 420 * was loaded), and allocate the memory we need downwards. 421 * If we get too close to the L1 table that we set up, we 422 * will panic. We will update physical_freestart and 423 * physical_freeend later to reflect what pmap_bootstrap() 424 * wants to see. 425 * 426 * XXX pmap_bootstrap() needs an enema. 427 */ 428 physical_start = bootconfig.dram[0].address; 429 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 430 431 physical_freestart = 0xc0009000UL; 432 physical_freeend = 0xc0200000UL; 433 434 #ifdef VERBOSE_INIT_ARM 435 /* Tell the user about the memory */ 436 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 437 physical_start, physical_end - 1); 438 #endif 439 440 /* 441 * Okay, the kernel starts 2MB in from the bottom of physical 442 * memory. We are going to allocate our bootstrap pages downwards 443 * from there. 444 * 445 * We need to allocate some fixed page tables to get the kernel 446 * going. We allocate one page directory and a number of page 447 * tables and store the physical addresses in the kernel_pt_table 448 * array. 449 * 450 * The kernel page directory must be on a 16K boundary. The page 451 * tables must be on 4K boundaries. What we do is allocate the 452 * page directory on the first 16K boundary that we encounter, and 453 * the page tables on 4K boundaries otherwise. Since we allocate 454 * at least 3 L2 page tables, we are guaranteed to encounter at 455 * least one 16K aligned region. 456 */ 457 458 #ifdef VERBOSE_INIT_ARM 459 printf("Allocating page tables\n"); 460 #endif 461 462 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 463 464 #ifdef VERBOSE_INIT_ARM 465 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 466 physical_freestart, free_pages, free_pages); 467 #endif 468 469 /* Define a macro to simplify memory allocation */ 470 #define valloc_pages(var, np) \ 471 alloc_pages((var).pv_pa, (np)); \ 472 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 473 474 #define alloc_pages(var, np) \ 475 physical_freeend -= ((np) * PAGE_SIZE); \ 476 if (physical_freeend < physical_freestart) \ 477 panic("initarm: out of memory"); \ 478 (var) = physical_freeend; \ 479 free_pages -= (np); \ 480 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 481 482 loop1 = 0; 483 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 484 /* Are we 16KB aligned for an L1 ? */ 485 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 486 && kernel_l1pt.pv_pa == 0) { 487 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 488 } else { 489 valloc_pages(kernel_pt_table[loop1], 490 L2_TABLE_SIZE / PAGE_SIZE); 491 ++loop1; 492 } 493 } 494 495 /* This should never be able to happen but better confirm that. */ 496 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 497 panic("initarm: Failed to align the kernel page directory\n"); 498 499 /* 500 * Allocate a page for the system page mapped to V0x00000000 501 * This page will just contain the system vectors and can be 502 * shared by all processes. 503 */ 504 alloc_pages(systempage.pv_pa, 1); 505 506 /* Allocate stacks for all modes */ 507 valloc_pages(irqstack, IRQ_STACK_SIZE); 508 valloc_pages(abtstack, ABT_STACK_SIZE); 509 valloc_pages(undstack, UND_STACK_SIZE); 510 valloc_pages(kernelstack, UPAGES); 511 512 /* Allocate enough pages for cleaning the Mini-Data cache. */ 513 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 514 valloc_pages(minidataclean, 1); 515 516 #ifdef VERBOSE_INIT_ARM 517 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 518 irqstack.pv_va); 519 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 520 abtstack.pv_va); 521 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 522 undstack.pv_va); 523 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 524 kernelstack.pv_va); 525 #endif 526 527 /* 528 * XXX Defer this to later so that we can reclaim the memory 529 * XXX used by the RedBoot page tables. 530 */ 531 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 532 533 /* 534 * Ok we have allocated physical pages for the primary kernel 535 * page tables 536 */ 537 538 #ifdef VERBOSE_INIT_ARM 539 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 540 #endif 541 542 /* 543 * Now we start construction of the L1 page table 544 * We start by mapping the L2 page tables into the L1. 545 * This means that we can replace L1 mappings later on if necessary 546 */ 547 l1pagetable = kernel_l1pt.pv_pa; 548 549 /* Map the L2 pages tables in the L1 page table */ 550 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 551 &kernel_pt_table[KERNEL_PT_SYS]); 552 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 553 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 554 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 555 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 556 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 557 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 558 559 /* update the top of the kernel VM */ 560 pmap_curmaxkvaddr = 561 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 562 563 #ifdef VERBOSE_INIT_ARM 564 printf("Mapping kernel\n"); 565 #endif 566 567 /* Now we fill in the L2 pagetable for the kernel static code/data */ 568 { 569 extern char etext[], _end[]; 570 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 571 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 572 u_int logical; 573 574 textsize = (textsize + PGOFSET) & ~PGOFSET; 575 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 576 577 logical = 0x00200000; /* offset of kernel in RAM */ 578 579 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 580 physical_start + logical, textsize, 581 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 582 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 583 physical_start + logical, totalsize - textsize, 584 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 585 } 586 587 #ifdef VERBOSE_INIT_ARM 588 printf("Constructing L2 page tables\n"); 589 #endif 590 591 /* Map the stack pages */ 592 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 593 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 594 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 595 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 596 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 597 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 598 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 599 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 600 601 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 602 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 603 604 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 605 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 606 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 607 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 608 } 609 610 /* Map the Mini-Data cache clean area. */ 611 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 612 minidataclean.pv_pa); 613 614 /* Map the vector page. */ 615 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 616 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 617 618 /* Map the statically mapped devices. */ 619 pmap_devmap_bootstrap(l1pagetable, brh_devmap); 620 621 /* 622 * Give the XScale global cache clean code an appropriately 623 * sized chunk of unmapped VA space starting at 0xff500000 624 * (our device mappings end before this address). 625 */ 626 xscale_cache_clean_addr = 0xff500000U; 627 628 /* 629 * Now we have the real page tables in place so we can switch to them. 630 * Once this is done we will be running with the REAL kernel page 631 * tables. 632 */ 633 634 /* Switch tables */ 635 #ifdef VERBOSE_INIT_ARM 636 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 637 #endif 638 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 639 cpu_setttb(kernel_l1pt.pv_pa, true); 640 cpu_tlb_flushID(); 641 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 642 643 /* 644 * Move from cpu_startup() as data_abort_handler() references 645 * this during uvm init 646 */ 647 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 648 649 #ifdef VERBOSE_INIT_ARM 650 printf("done!\n"); 651 #endif 652 653 #ifdef VERBOSE_INIT_ARM 654 printf("bootstrap done.\n"); 655 #endif 656 657 /* 658 * Inform the BECC code where the BECC is mapped. 659 */ 660 becc_vaddr = BRH_BECC_VBASE; 661 662 /* 663 * Now that we have becc_vaddr set, calibrate delay. 664 */ 665 becc_calibrate_delay(); 666 667 /* 668 * BECC <= Rev7 can only address 64M through the inbound 669 * PCI windows. Limit memory to 64M on those revs. (This 670 * problem was fixed in Rev8 of the BECC; get an FPGA upgrade.) 671 */ 672 { 673 vaddr_t va = BRH_PCI_CONF_VBASE | (1U << BECC_IDSEL_BIT) | 674 PCI_CLASS_REG; 675 uint32_t reg; 676 677 reg = *(volatile uint32_t *) va; 678 becc_rev = PCI_REVISION(reg); 679 if (becc_rev <= BECC_REV_V7 && 680 memsize > (64UL * 1024 * 1024)) { 681 memsize = (64UL * 1024 * 1024); 682 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 683 physical_end = physical_start + 684 (bootconfig.dram[0].pages * PAGE_SIZE); 685 printf("BECC <= Rev7: memory truncated to 64M\n"); 686 } 687 } 688 689 /* 690 * Update the physical_freestart/physical_freeend/free_pages 691 * variables. 692 */ 693 { 694 extern char _end[]; 695 696 physical_freestart = physical_start + 697 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 698 KERNEL_BASE); 699 physical_freeend = physical_end; 700 free_pages = 701 (physical_freeend - physical_freestart) / PAGE_SIZE; 702 } 703 #ifdef VERBOSE_INIT_ARM 704 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 705 physical_freestart, free_pages, free_pages); 706 #endif 707 708 physmem = (physical_end - physical_start) / PAGE_SIZE; 709 710 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 711 712 /* 713 * Pages were allocated during the secondary bootstrap for the 714 * stacks for different CPU modes. 715 * We must now set the r13 registers in the different CPU modes to 716 * point to these stacks. 717 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 718 * of the stack memory. 719 */ 720 #ifdef VERBOSE_INIT_ARM 721 printf("init subsystems: stacks "); 722 #endif 723 724 set_stackptr(PSR_IRQ32_MODE, 725 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 726 set_stackptr(PSR_ABT32_MODE, 727 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 728 set_stackptr(PSR_UND32_MODE, 729 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 730 731 /* 732 * Well we should set a data abort handler. 733 * Once things get going this will change as we will need a proper 734 * handler. 735 * Until then we will use a handler that just panics but tells us 736 * why. 737 * Initialisation of the vectors will just panic on a data abort. 738 * This just fills in a slightly better one. 739 */ 740 #ifdef VERBOSE_INIT_ARM 741 printf("vectors "); 742 #endif 743 data_abort_handler_address = (u_int)data_abort_handler; 744 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 745 undefined_handler_address = (u_int)undefinedinstruction_bounce; 746 747 /* Initialise the undefined instruction handlers */ 748 #ifdef VERBOSE_INIT_ARM 749 printf("undefined "); 750 #endif 751 undefined_init(); 752 753 /* Load memory into UVM. */ 754 #ifdef VERBOSE_INIT_ARM 755 printf("page "); 756 #endif 757 uvm_md_init(); 758 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 759 atop(physical_freestart), atop(physical_freeend), 760 VM_FREELIST_DEFAULT); 761 762 /* Boot strap pmap telling it where the managed kernel virtual memory is */ 763 #ifdef VERBOSE_INIT_ARM 764 printf("pmap "); 765 #endif 766 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 767 768 /* Setup the IRQ system */ 769 #ifdef VERBOSE_INIT_ARM 770 printf("irq "); 771 #endif 772 becc_intr_init(); 773 #ifdef VERBOSE_INIT_ARM 774 printf("done.\n"); 775 #endif 776 777 #ifdef DDB 778 db_machine_init(); 779 if (boothowto & RB_KDB) 780 Debugger(); 781 #endif 782 783 /* We return the new stack pointer address */ 784 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 785 } 786 787 void 788 consinit(void) 789 { 790 static const bus_addr_t comcnaddrs[] = { 791 BRH_UART1_BASE, /* com0 */ 792 BRH_UART2_BASE, /* com1 */ 793 }; 794 static int consinit_called; 795 796 if (consinit_called != 0) 797 return; 798 799 consinit_called = 1; 800 801 /* 802 * brh_start() has mapped the console devices for us per 803 * the devmap, so register it now so drivers can map the 804 * console device. 805 */ 806 pmap_devmap_register(brh_devmap); 807 808 #if NCOM > 0 809 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 810 BECC_PERIPH_CLOCK, COM_TYPE_NORMAL, comcnmode)) 811 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 812 #else 813 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 814 #endif 815 } 816