brh_machdep.c revision 1.23.12.1
1 /* $NetBSD: brh_machdep.c,v 1.23.12.1 2006/05/24 15:47:53 tron 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 dependant 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 1.23.12.1 2006/05/24 15:47:53 tron 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 <machine/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 "opt_ipkdb.h" 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 /* 134 * Address to call from cpu_reset() to reset the machine. 135 * This is machine architecture dependant as it varies depending 136 * on where the ROM appears when you turn the MMU off. 137 */ 138 139 u_int cpu_reset_address = 0x00000000; 140 141 /* Define various stack sizes in pages */ 142 #define IRQ_STACK_SIZE 1 143 #define ABT_STACK_SIZE 1 144 #ifdef IPKDB 145 #define UND_STACK_SIZE 2 146 #else 147 #define UND_STACK_SIZE 1 148 #endif 149 150 BootConfig bootconfig; /* Boot config storage */ 151 char *boot_args = NULL; 152 char *boot_file = NULL; 153 154 vm_offset_t physical_start; 155 vm_offset_t physical_freestart; 156 vm_offset_t physical_freeend; 157 vm_offset_t physical_end; 158 u_int free_pages; 159 vm_offset_t pagetables_start; 160 int physmem = 0; 161 162 /*int debug_flags;*/ 163 #ifndef PMAP_STATIC_L1S 164 int max_processes = 64; /* Default number */ 165 #endif /* !PMAP_STATIC_L1S */ 166 167 /* Physical and virtual addresses for some global pages */ 168 pv_addr_t systempage; 169 pv_addr_t irqstack; 170 pv_addr_t undstack; 171 pv_addr_t abtstack; 172 pv_addr_t kernelstack; 173 pv_addr_t minidataclean; 174 175 vm_offset_t msgbufphys; 176 177 extern u_int data_abort_handler_address; 178 extern u_int prefetch_abort_handler_address; 179 extern u_int undefined_handler_address; 180 181 #ifdef PMAP_DEBUG 182 extern int pmap_debug_level; 183 #endif 184 185 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 186 187 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 188 #define KERNEL_PT_KERNEL_NUM 2 189 190 /* L2 tables for mapping kernel VM */ 191 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 192 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 193 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 194 195 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 196 197 struct user *proc0paddr; 198 199 /* Prototypes */ 200 201 void consinit(void); 202 203 #include "com.h" 204 #if NCOM > 0 205 #include <dev/ic/comreg.h> 206 #include <dev/ic/comvar.h> 207 #endif 208 209 /* 210 * Define the default console speed for the board. This is generally 211 * what the firmware provided with the board defaults to. 212 */ 213 #ifndef CONSPEED 214 #define CONSPEED B57600 215 #endif /* ! CONSPEED */ 216 217 #ifndef CONUNIT 218 #define CONUNIT 0 219 #endif 220 221 #ifndef CONMODE 222 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 223 #endif 224 225 int comcnspeed = CONSPEED; 226 int comcnmode = CONMODE; 227 int comcnunit = CONUNIT; 228 229 /* 230 * void cpu_reboot(int howto, char *bootstr) 231 * 232 * Reboots the system 233 * 234 * Deal with any syncing, unmounting, dumping and shutdown hooks, 235 * then reset the CPU. 236 */ 237 void 238 cpu_reboot(int howto, char *bootstr) 239 { 240 241 /* 242 * If we are still cold then hit the air brakes 243 * and crash to earth fast 244 */ 245 if (cold) { 246 doshutdownhooks(); 247 printf("The operating system has halted.\n"); 248 printf("Please press any key to reboot.\n\n"); 249 cngetc(); 250 printf("rebooting...\n"); 251 goto reset; 252 } 253 254 /* Disable console buffering */ 255 256 /* 257 * If RB_NOSYNC was not specified sync the discs. 258 * Note: Unless cold is set to 1 here, syslogd will die during the 259 * unmount. It looks like syslogd is getting woken up only to find 260 * that it cannot page part of the binary in as the filesystem has 261 * been unmounted. 262 */ 263 if (!(howto & RB_NOSYNC)) 264 bootsync(); 265 266 /* Say NO to interrupts */ 267 splhigh(); 268 269 /* Do a dump if requested. */ 270 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 271 dumpsys(); 272 273 /* Run any shutdown hooks */ 274 doshutdownhooks(); 275 276 /* Make sure IRQ's are disabled */ 277 IRQdisable; 278 279 if (howto & RB_HALT) { 280 brh_7seg('8'); 281 printf("The operating system has halted.\n"); 282 printf("Please press any key to reboot.\n\n"); 283 cngetc(); 284 } 285 286 printf("rebooting...\n\r"); 287 reset: 288 cpu_reset(); 289 } 290 291 /* Static device mappings. */ 292 static const struct pmap_devmap brh_devmap[] = { 293 { 294 BRH_PCI_CONF_VBASE, 295 BECC_PCI_CONF_BASE, 296 BRH_PCI_CONF_VSIZE, 297 VM_PROT_READ|VM_PROT_WRITE, 298 PTE_NOCACHE, 299 }, 300 { 301 BRH_PCI_MEM1_VBASE, 302 BECC_PCI_MEM1_BASE, 303 BRH_PCI_MEM1_VSIZE, 304 VM_PROT_READ|VM_PROT_WRITE, 305 PTE_NOCACHE, 306 }, 307 { 308 BRH_PCI_MEM2_VBASE, 309 BECC_PCI_MEM2_BASE, 310 BRH_PCI_MEM2_VSIZE, 311 VM_PROT_READ|VM_PROT_WRITE, 312 PTE_NOCACHE, 313 }, 314 { 315 BRH_UART1_VBASE, 316 BRH_UART1_BASE, 317 BRH_UART1_VSIZE, 318 VM_PROT_READ|VM_PROT_WRITE, 319 PTE_NOCACHE, 320 }, 321 { 322 BRH_UART2_VBASE, 323 BRH_UART2_BASE, 324 BRH_UART2_VSIZE, 325 VM_PROT_READ|VM_PROT_WRITE, 326 PTE_NOCACHE, 327 }, 328 { 329 BRH_LED_VBASE, 330 BRH_LED_BASE, 331 BRH_LED_VSIZE, 332 VM_PROT_READ|VM_PROT_WRITE, 333 PTE_NOCACHE, 334 }, 335 { 336 BRH_PCI_IO_VBASE, 337 BECC_PCI_IO_BASE, 338 BRH_PCI_IO_VSIZE, 339 VM_PROT_READ|VM_PROT_WRITE, 340 PTE_NOCACHE, 341 }, 342 { 343 BRH_BECC_VBASE, 344 BECC_REG_BASE, 345 BRH_BECC_VSIZE, 346 VM_PROT_READ|VM_PROT_WRITE, 347 PTE_NOCACHE, 348 }, 349 { 350 0, 351 0, 352 0, 353 0, 354 0, 355 } 356 }; 357 358 static void 359 brh_hardclock_hook(void) 360 { 361 static int snakefreq; 362 363 if ((snakefreq++ & 15) == 0) 364 brh_7seg_snake(); 365 } 366 367 /* 368 * u_int initarm(...) 369 * 370 * Initial entry point on startup. This gets called before main() is 371 * entered. 372 * It should be responsible for setting up everything that must be 373 * in place when main is called. 374 * This includes 375 * Taking a copy of the boot configuration structure. 376 * Initialising the physical console so characters can be printed. 377 * Setting up page tables for the kernel 378 * Relocating the kernel to the bottom of physical memory 379 */ 380 u_int 381 initarm(void *arg) 382 { 383 extern vaddr_t xscale_cache_clean_addr; 384 #ifdef DIAGNOSTIC 385 extern vsize_t xscale_minidata_clean_size; 386 #endif 387 int loop; 388 int loop1; 389 u_int l1pagetable; 390 pv_addr_t kernel_l1pt; 391 paddr_t memstart; 392 psize_t memsize; 393 394 kernel_l1pt.pv_pa = 0; 395 kernel_l1pt.pv_va = 0; 396 397 /* 398 * Clear out the 7-segment display. Whee, the first visual 399 * indication that we're running kernel code. 400 */ 401 brh_7seg(' '); 402 403 /* 404 * Since we have mapped the on-board devices at their permanent 405 * locations already, it is possible for us to initialize 406 * the console now. 407 */ 408 consinit(); 409 410 #ifdef VERBOSE_INIT_ARM 411 /* Talk to the user */ 412 printf("\nNetBSD/evbarm (ADI BRH) booting ...\n"); 413 #endif 414 415 /* Calibrate the delay loop. */ 416 becc_hardclock_hook = brh_hardclock_hook; 417 418 /* 419 * Heads up ... Setup the CPU / MMU / TLB functions 420 */ 421 if (set_cpufuncs()) 422 panic("CPU not recognized!"); 423 424 /* 425 * We are currently running with the MMU enabled and the 426 * entire address space mapped VA==PA. Memory conveniently 427 * starts at 0xc0000000, which is where we want it. Certain 428 * on-board devices have already been mapped where we want 429 * them to be. There is an L1 page table at 0xc0004000. 430 */ 431 432 becc_icu_init(); 433 434 /* 435 * Memory always starts at 0xc0000000 on a BRH, and the 436 * memory size is always 128M. 437 */ 438 memstart = 0xc0000000UL; 439 memsize = (128UL * 1024 * 1024); 440 441 #ifdef VERBOSE_INIT_ARM 442 printf("initarm: Configuring system ...\n"); 443 #endif 444 445 /* Fake bootconfig structure for the benefit of pmap.c */ 446 /* XXX must make the memory description h/w independant */ 447 bootconfig.dramblocks = 1; 448 bootconfig.dram[0].address = memstart; 449 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 450 451 /* 452 * Set up the variables that define the availablilty of 453 * physical memory. For now, we're going to set 454 * physical_freestart to 0xc0200000 (where the kernel 455 * was loaded), and allocate the memory we need downwards. 456 * If we get too close to the L1 table that we set up, we 457 * will panic. We will update physical_freestart and 458 * physical_freeend later to reflect what pmap_bootstrap() 459 * wants to see. 460 * 461 * XXX pmap_bootstrap() needs an enema. 462 */ 463 physical_start = bootconfig.dram[0].address; 464 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 465 466 physical_freestart = 0xc0009000UL; 467 physical_freeend = 0xc0200000UL; 468 469 #ifdef VERBOSE_INIT_ARM 470 /* Tell the user about the memory */ 471 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 472 physical_start, physical_end - 1); 473 #endif 474 475 /* 476 * Okay, the kernel starts 2MB in from the bottom of physical 477 * memory. We are going to allocate our bootstrap pages downwards 478 * from there. 479 * 480 * We need to allocate some fixed page tables to get the kernel 481 * going. We allocate one page directory and a number of page 482 * tables and store the physical addresses in the kernel_pt_table 483 * array. 484 * 485 * The kernel page directory must be on a 16K boundary. The page 486 * tables must be on 4K boundaries. What we do is allocate the 487 * page directory on the first 16K boundary that we encounter, and 488 * the page tables on 4K boundaries otherwise. Since we allocate 489 * at least 3 L2 page tables, we are guaranteed to encounter at 490 * least one 16K aligned region. 491 */ 492 493 #ifdef VERBOSE_INIT_ARM 494 printf("Allocating page tables\n"); 495 #endif 496 497 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 498 499 #ifdef VERBOSE_INIT_ARM 500 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 501 physical_freestart, free_pages, free_pages); 502 #endif 503 504 /* Define a macro to simplify memory allocation */ 505 #define valloc_pages(var, np) \ 506 alloc_pages((var).pv_pa, (np)); \ 507 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 508 509 #define alloc_pages(var, np) \ 510 physical_freeend -= ((np) * PAGE_SIZE); \ 511 if (physical_freeend < physical_freestart) \ 512 panic("initarm: out of memory"); \ 513 (var) = physical_freeend; \ 514 free_pages -= (np); \ 515 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 516 517 loop1 = 0; 518 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 519 /* Are we 16KB aligned for an L1 ? */ 520 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 521 && kernel_l1pt.pv_pa == 0) { 522 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 523 } else { 524 valloc_pages(kernel_pt_table[loop1], 525 L2_TABLE_SIZE / PAGE_SIZE); 526 ++loop1; 527 } 528 } 529 530 /* This should never be able to happen but better confirm that. */ 531 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 532 panic("initarm: Failed to align the kernel page directory\n"); 533 534 /* 535 * Allocate a page for the system page mapped to V0x00000000 536 * This page will just contain the system vectors and can be 537 * shared by all processes. 538 */ 539 alloc_pages(systempage.pv_pa, 1); 540 541 /* Allocate stacks for all modes */ 542 valloc_pages(irqstack, IRQ_STACK_SIZE); 543 valloc_pages(abtstack, ABT_STACK_SIZE); 544 valloc_pages(undstack, UND_STACK_SIZE); 545 valloc_pages(kernelstack, UPAGES); 546 547 /* Allocate enough pages for cleaning the Mini-Data cache. */ 548 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 549 valloc_pages(minidataclean, 1); 550 551 #ifdef VERBOSE_INIT_ARM 552 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 553 irqstack.pv_va); 554 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 555 abtstack.pv_va); 556 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 557 undstack.pv_va); 558 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 559 kernelstack.pv_va); 560 #endif 561 562 /* 563 * XXX Defer this to later so that we can reclaim the memory 564 * XXX used by the RedBoot page tables. 565 */ 566 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 567 568 /* 569 * Ok we have allocated physical pages for the primary kernel 570 * page tables 571 */ 572 573 #ifdef VERBOSE_INIT_ARM 574 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 575 #endif 576 577 /* 578 * Now we start construction of the L1 page table 579 * We start by mapping the L2 page tables into the L1. 580 * This means that we can replace L1 mappings later on if necessary 581 */ 582 l1pagetable = kernel_l1pt.pv_pa; 583 584 /* Map the L2 pages tables in the L1 page table */ 585 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 586 &kernel_pt_table[KERNEL_PT_SYS]); 587 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 588 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 589 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 590 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 591 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 592 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 593 594 /* update the top of the kernel VM */ 595 pmap_curmaxkvaddr = 596 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 597 598 #ifdef VERBOSE_INIT_ARM 599 printf("Mapping kernel\n"); 600 #endif 601 602 /* Now we fill in the L2 pagetable for the kernel static code/data */ 603 { 604 extern char etext[], _end[]; 605 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 606 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 607 u_int logical; 608 609 textsize = (textsize + PGOFSET) & ~PGOFSET; 610 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 611 612 logical = 0x00200000; /* offset of kernel in RAM */ 613 614 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 615 physical_start + logical, textsize, 616 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 617 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 618 physical_start + logical, totalsize - textsize, 619 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 620 } 621 622 #ifdef VERBOSE_INIT_ARM 623 printf("Constructing L2 page tables\n"); 624 #endif 625 626 /* Map the stack pages */ 627 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 628 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 629 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 630 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 631 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 632 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 633 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 634 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 635 636 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 637 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 638 639 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 640 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 641 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 642 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 643 } 644 645 /* Map the Mini-Data cache clean area. */ 646 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 647 minidataclean.pv_pa); 648 649 /* Map the vector page. */ 650 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 651 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 652 653 /* Map the statically mapped devices. */ 654 pmap_devmap_bootstrap(l1pagetable, brh_devmap); 655 656 /* 657 * Give the XScale global cache clean code an appropriately 658 * sized chunk of unmapped VA space starting at 0xff500000 659 * (our device mappings end before this address). 660 */ 661 xscale_cache_clean_addr = 0xff500000U; 662 663 /* 664 * Now we have the real page tables in place so we can switch to them. 665 * Once this is done we will be running with the REAL kernel page 666 * tables. 667 */ 668 669 /* Switch tables */ 670 #ifdef VERBOSE_INIT_ARM 671 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 672 #endif 673 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 674 setttb(kernel_l1pt.pv_pa); 675 cpu_tlb_flushID(); 676 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 677 678 /* 679 * Move from cpu_startup() as data_abort_handler() references 680 * this during uvm init 681 */ 682 proc0paddr = (struct user *)kernelstack.pv_va; 683 lwp0.l_addr = proc0paddr; 684 685 #ifdef VERBOSE_INIT_ARM 686 printf("done!\n"); 687 #endif 688 689 #ifdef VERBOSE_INIT_ARM 690 printf("bootstrap done.\n"); 691 #endif 692 693 /* 694 * Inform the BECC code where the BECC is mapped. 695 */ 696 becc_vaddr = BRH_BECC_VBASE; 697 698 /* 699 * Now that we have becc_vaddr set, calibrate delay. 700 */ 701 becc_calibrate_delay(); 702 703 /* 704 * BECC <= Rev7 can only address 64M through the inbound 705 * PCI windows. Limit memory to 64M on those revs. (This 706 * problem was fixed in Rev8 of the BECC; get an FPGA upgrade.) 707 */ 708 { 709 vaddr_t va = BRH_PCI_CONF_VBASE | (1U << BECC_IDSEL_BIT) | 710 PCI_CLASS_REG; 711 uint32_t reg; 712 713 reg = *(volatile uint32_t *) va; 714 becc_rev = PCI_REVISION(reg); 715 if (becc_rev <= BECC_REV_V7 && 716 memsize > (64UL * 1024 * 1024)) { 717 memsize = (64UL * 1024 * 1024); 718 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 719 physical_end = physical_start + 720 (bootconfig.dram[0].pages * PAGE_SIZE); 721 printf("BECC <= Rev7: memory truncated to 64M\n"); 722 } 723 } 724 725 /* 726 * Update the physical_freestart/physical_freeend/free_pages 727 * variables. 728 */ 729 { 730 extern char _end[]; 731 732 physical_freestart = physical_start + 733 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 734 KERNEL_BASE); 735 physical_freeend = physical_end; 736 free_pages = 737 (physical_freeend - physical_freestart) / PAGE_SIZE; 738 } 739 #ifdef VERBOSE_INIT_ARM 740 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 741 physical_freestart, free_pages, free_pages); 742 #endif 743 744 physmem = (physical_end - physical_start) / PAGE_SIZE; 745 746 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 747 748 /* 749 * Pages were allocated during the secondary bootstrap for the 750 * stacks for different CPU modes. 751 * We must now set the r13 registers in the different CPU modes to 752 * point to these stacks. 753 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 754 * of the stack memory. 755 */ 756 #ifdef VERBOSE_INIT_ARM 757 printf("init subsystems: stacks "); 758 #endif 759 760 set_stackptr(PSR_IRQ32_MODE, 761 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 762 set_stackptr(PSR_ABT32_MODE, 763 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 764 set_stackptr(PSR_UND32_MODE, 765 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 766 767 /* 768 * Well we should set a data abort handler. 769 * Once things get going this will change as we will need a proper 770 * handler. 771 * Until then we will use a handler that just panics but tells us 772 * why. 773 * Initialisation of the vectors will just panic on a data abort. 774 * This just fills in a slightly better one. 775 */ 776 #ifdef VERBOSE_INIT_ARM 777 printf("vectors "); 778 #endif 779 data_abort_handler_address = (u_int)data_abort_handler; 780 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 781 undefined_handler_address = (u_int)undefinedinstruction_bounce; 782 783 /* Initialise the undefined instruction handlers */ 784 #ifdef VERBOSE_INIT_ARM 785 printf("undefined "); 786 #endif 787 undefined_init(); 788 789 /* Load memory into UVM. */ 790 #ifdef VERBOSE_INIT_ARM 791 printf("page "); 792 #endif 793 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 794 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 795 atop(physical_freestart), atop(physical_freeend), 796 VM_FREELIST_DEFAULT); 797 798 /* Boot strap pmap telling it where the kernel page table is */ 799 #ifdef VERBOSE_INIT_ARM 800 printf("pmap "); 801 #endif 802 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 803 KERNEL_VM_BASE + KERNEL_VM_SIZE); 804 805 /* Setup the IRQ system */ 806 #ifdef VERBOSE_INIT_ARM 807 printf("irq "); 808 #endif 809 becc_intr_init(); 810 #ifdef VERBOSE_INIT_ARM 811 printf("done.\n"); 812 #endif 813 814 #ifdef IPKDB 815 /* Initialise ipkdb */ 816 ipkdb_init(); 817 if (boothowto & RB_KDB) 818 ipkdb_connect(0); 819 #endif 820 821 822 #if NKSYMS || defined(DDB) || defined(LKM) 823 /* Firmware doesn't load symbols. */ 824 ksyms_init(0, NULL, NULL); 825 #endif 826 827 #ifdef DDB 828 db_machine_init(); 829 if (boothowto & RB_KDB) 830 Debugger(); 831 #endif 832 833 /* We return the new stack pointer address */ 834 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 835 } 836 837 void 838 consinit(void) 839 { 840 static const bus_addr_t comcnaddrs[] = { 841 BRH_UART1_BASE, /* com0 */ 842 BRH_UART2_BASE, /* com1 */ 843 }; 844 static int consinit_called; 845 846 if (consinit_called != 0) 847 return; 848 849 consinit_called = 1; 850 851 /* 852 * brh_start() has mapped the console devices for us per 853 * the devmap, so register it now so drivers can map the 854 * console device. 855 */ 856 pmap_devmap_register(brh_devmap); 857 858 #if NCOM > 0 859 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 860 BECC_PERIPH_CLOCK, COM_TYPE_NORMAL, comcnmode)) 861 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 862 #else 863 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 864 #endif 865 } 866
Indexes created Tue Oct 14 01:09:49 GMT 2025