brh_machdep.c revision 1.44.16.1
1 /* $NetBSD: brh_machdep.c,v 1.44.16.1 2019/06/10 22:06:03 christos 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 1.44.16.1 2019/06/10 22:06:03 christos Exp $"); 77 78 #include "opt_arm_debug.h" 79 #include "opt_console.h" 80 #include "opt_ddb.h" 81 #include "opt_pmap_debug.h" 82 83 #include <sys/param.h> 84 #include <sys/device.h> 85 #include <sys/systm.h> 86 #include <sys/kernel.h> 87 #include <sys/exec.h> 88 #include <sys/proc.h> 89 #include <sys/msgbuf.h> 90 #include <sys/reboot.h> 91 #include <sys/termios.h> 92 #include <sys/ksyms.h> 93 #include <sys/bus.h> 94 #include <sys/cpu.h> 95 96 #include <uvm/uvm_extern.h> 97 98 #include <dev/cons.h> 99 100 #include <machine/db_machdep.h> 101 #include <ddb/db_sym.h> 102 #include <ddb/db_extern.h> 103 104 #include <machine/bootconfig.h> 105 #include <arm/locore.h> 106 #include <arm/undefined.h> 107 108 #include <arm/arm32/machdep.h> 109 110 #include <arm/xscale/i80200reg.h> 111 #include <arm/xscale/i80200var.h> 112 113 #include <dev/pci/ppbreg.h> 114 115 #include <arm/xscale/beccreg.h> 116 #include <arm/xscale/beccvar.h> 117 118 #include <evbarm/adi_brh/brhreg.h> 119 #include <evbarm/adi_brh/brhvar.h> 120 #include <evbarm/adi_brh/obiovar.h> 121 122 #include "ksyms.h" 123 124 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 125 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 126 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 127 128 /* 129 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 130 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 131 */ 132 #define KERNEL_VM_SIZE 0x0C000000 133 134 BootConfig bootconfig; /* Boot config storage */ 135 char *boot_args = NULL; 136 char *boot_file = NULL; 137 138 vaddr_t physical_start; 139 vaddr_t physical_freestart; 140 vaddr_t physical_freeend; 141 vaddr_t physical_end; 142 u_int free_pages; 143 144 /*int debug_flags;*/ 145 #ifndef PMAP_STATIC_L1S 146 int max_processes = 64; /* Default number */ 147 #endif /* !PMAP_STATIC_L1S */ 148 149 /* Physical and virtual addresses for some global pages */ 150 pv_addr_t minidataclean; 151 152 paddr_t msgbufphys; 153 154 #ifdef PMAP_DEBUG 155 extern int pmap_debug_level; 156 #endif 157 158 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 159 160 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 161 #define KERNEL_PT_KERNEL_NUM 2 162 163 /* L2 tables for mapping kernel VM */ 164 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 165 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 166 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 167 168 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 169 170 /* Prototypes */ 171 172 void consinit(void); 173 174 #include "com.h" 175 #if NCOM > 0 176 #include <dev/ic/comreg.h> 177 #include <dev/ic/comvar.h> 178 #endif 179 180 /* 181 * Define the default console speed for the board. This is generally 182 * what the firmware provided with the board defaults to. 183 */ 184 #ifndef CONSPEED 185 #define CONSPEED B57600 186 #endif /* ! CONSPEED */ 187 188 #ifndef CONUNIT 189 #define CONUNIT 0 190 #endif 191 192 #ifndef CONMODE 193 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 194 #endif 195 196 int comcnspeed = CONSPEED; 197 int comcnmode = CONMODE; 198 int comcnunit = CONUNIT; 199 200 /* 201 * void cpu_reboot(int howto, char *bootstr) 202 * 203 * Reboots the system 204 * 205 * Deal with any syncing, unmounting, dumping and shutdown hooks, 206 * then reset the CPU. 207 */ 208 void 209 cpu_reboot(int howto, char *bootstr) 210 { 211 212 /* 213 * If we are still cold then hit the air brakes 214 * and crash to earth fast 215 */ 216 if (cold) { 217 doshutdownhooks(); 218 pmf_system_shutdown(boothowto); 219 printf("The operating system has halted.\n"); 220 printf("Please press any key to reboot.\n\n"); 221 cngetc(); 222 printf("rebooting...\n"); 223 goto reset; 224 } 225 226 /* Disable console buffering */ 227 228 /* 229 * If RB_NOSYNC was not specified sync the discs. 230 * Note: Unless cold is set to 1 here, syslogd will die during the 231 * unmount. It looks like syslogd is getting woken up only to find 232 * that it cannot page part of the binary in as the filesystem has 233 * been unmounted. 234 */ 235 if (!(howto & RB_NOSYNC)) 236 bootsync(); 237 238 /* Say NO to interrupts */ 239 splhigh(); 240 241 /* Do a dump if requested. */ 242 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 243 dumpsys(); 244 245 /* Run any shutdown hooks */ 246 doshutdownhooks(); 247 248 pmf_system_shutdown(boothowto); 249 250 /* Make sure IRQ's are disabled */ 251 IRQdisable; 252 253 if (howto & RB_HALT) { 254 brh_7seg('8'); 255 printf("The operating system has halted.\n"); 256 printf("Please press any key to reboot.\n\n"); 257 cngetc(); 258 } 259 260 printf("rebooting...\n\r"); 261 reset: 262 cpu_reset(); 263 } 264 265 /* Static device mappings. */ 266 static const struct pmap_devmap brh_devmap[] = { 267 { 268 BRH_PCI_CONF_VBASE, 269 BECC_PCI_CONF_BASE, 270 BRH_PCI_CONF_VSIZE, 271 VM_PROT_READ|VM_PROT_WRITE, 272 PTE_NOCACHE, 273 }, 274 { 275 BRH_PCI_MEM1_VBASE, 276 BECC_PCI_MEM1_BASE, 277 BRH_PCI_MEM1_VSIZE, 278 VM_PROT_READ|VM_PROT_WRITE, 279 PTE_NOCACHE, 280 }, 281 { 282 BRH_PCI_MEM2_VBASE, 283 BECC_PCI_MEM2_BASE, 284 BRH_PCI_MEM2_VSIZE, 285 VM_PROT_READ|VM_PROT_WRITE, 286 PTE_NOCACHE, 287 }, 288 { 289 BRH_UART1_VBASE, 290 BRH_UART1_BASE, 291 BRH_UART1_VSIZE, 292 VM_PROT_READ|VM_PROT_WRITE, 293 PTE_NOCACHE, 294 }, 295 { 296 BRH_UART2_VBASE, 297 BRH_UART2_BASE, 298 BRH_UART2_VSIZE, 299 VM_PROT_READ|VM_PROT_WRITE, 300 PTE_NOCACHE, 301 }, 302 { 303 BRH_LED_VBASE, 304 BRH_LED_BASE, 305 BRH_LED_VSIZE, 306 VM_PROT_READ|VM_PROT_WRITE, 307 PTE_NOCACHE, 308 }, 309 { 310 BRH_PCI_IO_VBASE, 311 BECC_PCI_IO_BASE, 312 BRH_PCI_IO_VSIZE, 313 VM_PROT_READ|VM_PROT_WRITE, 314 PTE_NOCACHE, 315 }, 316 { 317 BRH_BECC_VBASE, 318 BECC_REG_BASE, 319 BRH_BECC_VSIZE, 320 VM_PROT_READ|VM_PROT_WRITE, 321 PTE_NOCACHE, 322 }, 323 { 324 0, 325 0, 326 0, 327 0, 328 0, 329 } 330 }; 331 332 static void 333 brh_hardclock_hook(void) 334 { 335 static int snakefreq; 336 337 if ((snakefreq++ & 15) == 0) 338 brh_7seg_snake(); 339 } 340 341 /* 342 * u_int initarm(...) 343 * 344 * Initial entry point on startup. This gets called before main() is 345 * entered. 346 * It should be responsible for setting up everything that must be 347 * in place when main is called. 348 * This includes 349 * Taking a copy of the boot configuration structure. 350 * Initialising the physical console so characters can be printed. 351 * Setting up page tables for the kernel 352 * Relocating the kernel to the bottom of physical memory 353 */ 354 u_int 355 initarm(void *arg) 356 { 357 extern vaddr_t xscale_cache_clean_addr; 358 #ifdef DIAGNOSTIC 359 extern vsize_t xscale_minidata_clean_size; 360 #endif 361 int loop; 362 int loop1; 363 u_int l1pagetable; 364 paddr_t memstart; 365 psize_t memsize; 366 367 /* 368 * Clear out the 7-segment display. Whee, the first visual 369 * indication that we're running kernel code. 370 */ 371 brh_7seg(' '); 372 373 /* 374 * Since we have mapped the on-board devices at their permanent 375 * locations already, it is possible for us to initialize 376 * the console now. 377 */ 378 consinit(); 379 380 #ifdef VERBOSE_INIT_ARM 381 /* Talk to the user */ 382 printf("\nNetBSD/evbarm (ADI BRH) booting ...\n"); 383 #endif 384 385 /* Calibrate the delay loop. */ 386 becc_hardclock_hook = brh_hardclock_hook; 387 388 /* 389 * Heads up ... Setup the CPU / MMU / TLB functions 390 */ 391 if (set_cpufuncs()) 392 panic("CPU not recognized!"); 393 394 /* 395 * We are currently running with the MMU enabled and the 396 * entire address space mapped VA==PA. Memory conveniently 397 * starts at 0xc0000000, which is where we want it. Certain 398 * on-board devices have already been mapped where we want 399 * them to be. There is an L1 page table at 0xc0004000. 400 */ 401 402 becc_icu_init(); 403 404 /* 405 * Memory always starts at 0xc0000000 on a BRH, and the 406 * memory size is always 128M. 407 */ 408 memstart = 0xc0000000UL; 409 memsize = (128UL * 1024 * 1024); 410 411 #ifdef VERBOSE_INIT_ARM 412 printf("initarm: Configuring system ...\n"); 413 #endif 414 415 /* Fake bootconfig structure for the benefit of pmap.c */ 416 /* XXX must make the memory description h/w independent */ 417 bootconfig.dramblocks = 1; 418 bootconfig.dram[0].address = memstart; 419 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 420 421 /* 422 * Set up the variables that define the availablilty of 423 * physical memory. For now, we're going to set 424 * physical_freestart to 0xc0200000 (where the kernel 425 * was loaded), and allocate the memory we need downwards. 426 * If we get too close to the L1 table that we set up, we 427 * will panic. We will update physical_freestart and 428 * physical_freeend later to reflect what pmap_bootstrap() 429 * wants to see. 430 * 431 * XXX pmap_bootstrap() needs an enema. 432 */ 433 physical_start = bootconfig.dram[0].address; 434 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 435 436 physical_freestart = 0xc0009000UL; 437 physical_freeend = 0xc0200000UL; 438 439 #ifdef VERBOSE_INIT_ARM 440 /* Tell the user about the memory */ 441 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 442 physical_start, physical_end - 1); 443 #endif 444 445 /* 446 * Okay, the kernel starts 2MB in from the bottom of physical 447 * memory. We are going to allocate our bootstrap pages downwards 448 * from there. 449 * 450 * We need to allocate some fixed page tables to get the kernel 451 * going. We allocate one page directory and a number of page 452 * tables and store the physical addresses in the kernel_pt_table 453 * array. 454 * 455 * The kernel page directory must be on a 16K boundary. The page 456 * tables must be on 4K boundaries. What we do is allocate the 457 * page directory on the first 16K boundary that we encounter, and 458 * the page tables on 4K boundaries otherwise. Since we allocate 459 * at least 3 L2 page tables, we are guaranteed to encounter at 460 * least one 16K aligned region. 461 */ 462 463 #ifdef VERBOSE_INIT_ARM 464 printf("Allocating page tables\n"); 465 #endif 466 467 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 468 469 #ifdef VERBOSE_INIT_ARM 470 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 471 physical_freestart, free_pages, free_pages); 472 #endif 473 474 /* Define a macro to simplify memory allocation */ 475 #define valloc_pages(var, np) \ 476 alloc_pages((var).pv_pa, (np)); \ 477 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 478 479 #define alloc_pages(var, np) \ 480 physical_freeend -= ((np) * PAGE_SIZE); \ 481 if (physical_freeend < physical_freestart) \ 482 panic("initarm: out of memory"); \ 483 (var) = physical_freeend; \ 484 free_pages -= (np); \ 485 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 486 487 loop1 = 0; 488 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 489 /* Are we 16KB aligned for an L1 ? */ 490 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 491 && kernel_l1pt.pv_pa == 0) { 492 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 493 } else { 494 valloc_pages(kernel_pt_table[loop1], 495 L2_TABLE_SIZE / PAGE_SIZE); 496 ++loop1; 497 } 498 } 499 500 /* This should never be able to happen but better confirm that. */ 501 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 502 panic("initarm: Failed to align the kernel page directory\n"); 503 504 /* 505 * Allocate a page for the system page mapped to V0x00000000 506 * This page will just contain the system vectors and can be 507 * shared by all processes. 508 */ 509 alloc_pages(systempage.pv_pa, 1); 510 511 /* Allocate stacks for all modes */ 512 valloc_pages(irqstack, IRQ_STACK_SIZE); 513 valloc_pages(abtstack, ABT_STACK_SIZE); 514 valloc_pages(undstack, UND_STACK_SIZE); 515 valloc_pages(kernelstack, UPAGES); 516 517 /* Allocate enough pages for cleaning the Mini-Data cache. */ 518 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 519 valloc_pages(minidataclean, 1); 520 521 #ifdef VERBOSE_INIT_ARM 522 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 523 irqstack.pv_va); 524 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 525 abtstack.pv_va); 526 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 527 undstack.pv_va); 528 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 529 kernelstack.pv_va); 530 #endif 531 532 /* 533 * XXX Defer this to later so that we can reclaim the memory 534 * XXX used by the RedBoot page tables. 535 */ 536 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 537 538 /* 539 * Ok we have allocated physical pages for the primary kernel 540 * page tables 541 */ 542 543 #ifdef VERBOSE_INIT_ARM 544 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 545 #endif 546 547 /* 548 * Now we start construction of the L1 page table 549 * We start by mapping the L2 page tables into the L1. 550 * This means that we can replace L1 mappings later on if necessary 551 */ 552 l1pagetable = kernel_l1pt.pv_pa; 553 554 /* Map the L2 pages tables in the L1 page table */ 555 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 556 &kernel_pt_table[KERNEL_PT_SYS]); 557 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 558 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 559 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 560 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 561 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 562 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 563 564 /* update the top of the kernel VM */ 565 pmap_curmaxkvaddr = 566 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 567 568 #ifdef VERBOSE_INIT_ARM 569 printf("Mapping kernel\n"); 570 #endif 571 572 /* Now we fill in the L2 pagetable for the kernel static code/data */ 573 { 574 extern char etext[], _end[]; 575 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 576 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 577 u_int logical; 578 579 textsize = (textsize + PGOFSET) & ~PGOFSET; 580 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 581 582 logical = 0x00200000; /* offset of kernel in RAM */ 583 584 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 585 physical_start + logical, textsize, 586 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 587 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 588 physical_start + logical, totalsize - textsize, 589 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 590 } 591 592 #ifdef VERBOSE_INIT_ARM 593 printf("Constructing L2 page tables\n"); 594 #endif 595 596 /* Map the stack pages */ 597 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 598 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 599 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 600 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 601 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 602 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 603 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 604 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 605 606 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 607 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 608 609 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 610 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 611 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 612 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 613 } 614 615 /* Map the Mini-Data cache clean area. */ 616 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 617 minidataclean.pv_pa); 618 619 /* Map the vector page. */ 620 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 621 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 622 623 /* Map the statically mapped devices. */ 624 pmap_devmap_bootstrap(l1pagetable, brh_devmap); 625 626 /* 627 * Give the XScale global cache clean code an appropriately 628 * sized chunk of unmapped VA space starting at 0xff500000 629 * (our device mappings end before this address). 630 */ 631 xscale_cache_clean_addr = 0xff500000U; 632 633 /* 634 * Now we have the real page tables in place so we can switch to them. 635 * Once this is done we will be running with the REAL kernel page 636 * tables. 637 */ 638 639 /* Switch tables */ 640 #ifdef VERBOSE_INIT_ARM 641 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 642 #endif 643 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 644 cpu_setttb(kernel_l1pt.pv_pa, true); 645 cpu_tlb_flushID(); 646 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 647 648 /* 649 * Move from cpu_startup() as data_abort_handler() references 650 * this during uvm init 651 */ 652 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 653 654 #ifdef VERBOSE_INIT_ARM 655 printf("done!\n"); 656 #endif 657 658 #ifdef VERBOSE_INIT_ARM 659 printf("bootstrap done.\n"); 660 #endif 661 662 /* 663 * Inform the BECC code where the BECC is mapped. 664 */ 665 becc_vaddr = BRH_BECC_VBASE; 666 667 /* 668 * Now that we have becc_vaddr set, calibrate delay. 669 */ 670 becc_calibrate_delay(); 671 672 /* 673 * BECC <= Rev7 can only address 64M through the inbound 674 * PCI windows. Limit memory to 64M on those revs. (This 675 * problem was fixed in Rev8 of the BECC; get an FPGA upgrade.) 676 */ 677 { 678 vaddr_t va = BRH_PCI_CONF_VBASE | (1U << BECC_IDSEL_BIT) | 679 PCI_CLASS_REG; 680 uint32_t reg; 681 682 reg = *(volatile uint32_t *) va; 683 becc_rev = PCI_REVISION(reg); 684 if (becc_rev <= BECC_REV_V7 && 685 memsize > (64UL * 1024 * 1024)) { 686 memsize = (64UL * 1024 * 1024); 687 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 688 physical_end = physical_start + 689 (bootconfig.dram[0].pages * PAGE_SIZE); 690 printf("BECC <= Rev7: memory truncated to 64M\n"); 691 } 692 } 693 694 /* 695 * Update the physical_freestart/physical_freeend/free_pages 696 * variables. 697 */ 698 { 699 extern char _end[]; 700 701 physical_freestart = physical_start + 702 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 703 KERNEL_BASE); 704 physical_freeend = physical_end; 705 free_pages = 706 (physical_freeend - physical_freestart) / PAGE_SIZE; 707 } 708 #ifdef VERBOSE_INIT_ARM 709 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 710 physical_freestart, free_pages, free_pages); 711 #endif 712 713 physmem = (physical_end - physical_start) / PAGE_SIZE; 714 715 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 716 717 /* 718 * Pages were allocated during the secondary bootstrap for the 719 * stacks for different CPU modes. 720 * We must now set the r13 registers in the different CPU modes to 721 * point to these stacks. 722 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 723 * of the stack memory. 724 */ 725 #ifdef VERBOSE_INIT_ARM 726 printf("init subsystems: stacks "); 727 #endif 728 729 set_stackptr(PSR_IRQ32_MODE, 730 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 731 set_stackptr(PSR_ABT32_MODE, 732 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 733 set_stackptr(PSR_UND32_MODE, 734 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 735 736 /* 737 * Well we should set a data abort handler. 738 * Once things get going this will change as we will need a proper 739 * handler. 740 * Until then we will use a handler that just panics but tells us 741 * why. 742 * Initialisation of the vectors will just panic on a data abort. 743 * This just fills in a slightly better one. 744 */ 745 #ifdef VERBOSE_INIT_ARM 746 printf("vectors "); 747 #endif 748 data_abort_handler_address = (u_int)data_abort_handler; 749 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 750 undefined_handler_address = (u_int)undefinedinstruction_bounce; 751 752 /* Initialise the undefined instruction handlers */ 753 #ifdef VERBOSE_INIT_ARM 754 printf("undefined "); 755 #endif 756 undefined_init(); 757 758 /* Load memory into UVM. */ 759 #ifdef VERBOSE_INIT_ARM 760 printf("page "); 761 #endif 762 uvm_md_init(); 763 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 764 atop(physical_freestart), atop(physical_freeend), 765 VM_FREELIST_DEFAULT); 766 767 /* Boot strap pmap telling it where the managed kernel virtual memory is */ 768 #ifdef VERBOSE_INIT_ARM 769 printf("pmap "); 770 #endif 771 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 772 773 /* Setup the IRQ system */ 774 #ifdef VERBOSE_INIT_ARM 775 printf("irq "); 776 #endif 777 becc_intr_init(); 778 #ifdef VERBOSE_INIT_ARM 779 printf("done.\n"); 780 #endif 781 782 #ifdef DDB 783 db_machine_init(); 784 if (boothowto & RB_KDB) 785 Debugger(); 786 #endif 787 788 /* We return the new stack pointer address */ 789 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 790 } 791 792 void 793 consinit(void) 794 { 795 static const bus_addr_t comcnaddrs[] = { 796 BRH_UART1_BASE, /* com0 */ 797 BRH_UART2_BASE, /* com1 */ 798 }; 799 static int consinit_called; 800 801 if (consinit_called != 0) 802 return; 803 804 consinit_called = 1; 805 806 /* 807 * brh_start() has mapped the console devices for us per 808 * the devmap, so register it now so drivers can map the 809 * console device. 810 */ 811 pmap_devmap_register(brh_devmap); 812 813 #if NCOM > 0 814 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 815 BECC_PERIPH_CLOCK, COM_TYPE_NORMAL, comcnmode)) 816 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 817 #else 818 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 819 #endif 820 } 821
Indexes created Tue Oct 14 01:09:49 GMT 2025