1 /* $NetBSD: iq80321_machdep.c,v 1.66 2023/10/12 11:33:38 skrll Exp $ */ 2 3 /* 4 * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe and Steve C. Woodford 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 Intel IQ80321 evaluation 72 * boards using RedBoot firmware. 73 */ 74 75 #include <sys/cdefs.h> 76 __KERNEL_RCSID(0, "$NetBSD: iq80321_machdep.c,v 1.66 2023/10/12 11:33:38 skrll Exp $"); 77 78 #include "opt_console.h" 79 #include "opt_ddb.h" 80 #include "opt_kgdb.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/cpu.h> 93 #include <sys/bus.h> 94 95 #include <uvm/uvm_extern.h> 96 97 #include <dev/cons.h> 98 99 #include <dev/pci/ppbreg.h> 100 101 #include <machine/db_machdep.h> 102 #include <ddb/db_sym.h> 103 #include <ddb/db_extern.h> 104 105 #include <machine/bootconfig.h> 106 107 #include <arm/locore.h> 108 #include <arm/undefined.h> 109 110 #include <arm/arm32/machdep.h> 111 112 #include <arm/xscale/i80321reg.h> 113 #include <arm/xscale/i80321var.h> 114 115 #include <evbarm/iq80321/iq80321reg.h> 116 #include <evbarm/iq80321/iq80321var.h> 117 #include <evbarm/iq80321/obiovar.h> 118 119 #include "ksyms.h" 120 121 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 122 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 123 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 124 125 /* 126 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 127 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 128 */ 129 #define KERNEL_VM_SIZE 0x0C000000 130 131 BootConfig bootconfig; /* Boot config storage */ 132 char *boot_args = NULL; 133 char *boot_file = NULL; 134 135 vaddr_t physical_start; 136 vaddr_t physical_freestart; 137 vaddr_t physical_freeend; 138 vaddr_t physical_end; 139 u_int free_pages; 140 141 /*int debug_flags;*/ 142 #ifndef PMAP_STATIC_L1S 143 int max_processes = 64; /* Default number */ 144 #endif /* !PMAP_STATIC_L1S */ 145 146 /* Physical and virtual addresses for some global pages */ 147 pv_addr_t minidataclean; 148 149 paddr_t msgbufphys; 150 151 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 152 153 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 154 #define KERNEL_PT_KERNEL_NUM 4 155 156 /* L2 table for mapping i80321 */ 157 #define KERNEL_PT_IOPXS (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 158 159 /* L2 tables for mapping kernel VM */ 160 #define KERNEL_PT_VMDATA (KERNEL_PT_IOPXS + 1) 161 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 162 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 163 164 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 165 166 /* Prototypes */ 167 168 void consinit(void); 169 170 #include "com.h" 171 #if NCOM > 0 172 #include <dev/ic/comreg.h> 173 #include <dev/ic/comvar.h> 174 #endif 175 176 /* 177 * Define the default console speed for the board. This is generally 178 * what the firmware provided with the board defaults to. 179 */ 180 #ifndef CONSPEED 181 #define CONSPEED B115200 182 #endif /* ! CONSPEED */ 183 184 #ifndef CONUNIT 185 #define CONUNIT 0 186 #endif 187 188 #ifndef CONMODE 189 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 190 #endif 191 192 int comcnspeed = CONSPEED; 193 int comcnmode = CONMODE; 194 int comcnunit = CONUNIT; 195 196 #if KGDB 197 #ifndef KGDB_DEVNAME 198 #error Must define KGDB_DEVNAME 199 #endif 200 const char kgdb_devname[] = KGDB_DEVNAME; 201 202 #ifndef KGDB_DEVADDR 203 #error Must define KGDB_DEVADDR 204 #endif 205 unsigned long kgdb_devaddr = KGDB_DEVADDR; 206 207 #ifndef KGDB_DEVRATE 208 #define KGDB_DEVRATE CONSPEED 209 #endif 210 int kgdb_devrate = KGDB_DEVRATE; 211 212 #ifndef KGDB_DEVMODE 213 #define KGDB_DEVMODE CONMODE 214 #endif 215 int kgdb_devmode = KGDB_DEVMODE; 216 #endif /* KGDB */ 217 218 #if defined(I80321_REBOOT) 219 extern void I80321_REBOOT(int); 220 #endif 221 222 /* 223 * void cpu_reboot(int howto, char *bootstr) 224 * 225 * Reboots the system 226 * 227 * Deal with any syncing, unmounting, dumping and shutdown hooks, 228 * then reset the CPU. 229 */ 230 void 231 cpu_reboot(int howto, char *bootstr) 232 { 233 234 /* 235 * If we are still cold then hit the air brakes 236 * and crash to earth fast 237 */ 238 if (cold) { 239 doshutdownhooks(); 240 pmf_system_shutdown(boothowto); 241 printf("The operating system has halted.\n"); 242 printf("Please press any key to reboot.\n\n"); 243 cngetc(); 244 printf("rebooting...\n"); 245 goto reset; 246 } 247 248 /* Disable console buffering */ 249 250 /* 251 * If RB_NOSYNC was not specified sync the discs. 252 * Note: Unless cold is set to 1 here, syslogd will die during the 253 * unmount. It looks like syslogd is getting woken up only to find 254 * that it cannot page part of the binary in as the filesystem has 255 * been unmounted. 256 */ 257 if (!(howto & RB_NOSYNC)) 258 bootsync(); 259 260 /* Say NO to interrupts */ 261 splhigh(); 262 263 /* Do a dump if requested. */ 264 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 265 dumpsys(); 266 267 /* Run any shutdown hooks */ 268 doshutdownhooks(); 269 270 pmf_system_shutdown(boothowto); 271 272 /* Make sure IRQ's are disabled */ 273 IRQdisable; 274 275 if (howto & RB_HALT) { 276 #if defined(I80321_REBOOT) 277 I80321_REBOOT(howto); 278 #endif 279 iq80321_7seg('.', '.'); 280 printf("The operating system has halted.\n"); 281 printf("Please press any key to reboot.\n\n"); 282 cngetc(); 283 } 284 285 printf("rebooting...\n\r"); 286 reset: 287 #if defined(I80321_REBOOT) 288 I80321_REBOOT(howto); 289 #endif 290 291 /* 292 * Make really really sure that all interrupts are disabled, 293 * and poke the Internal Bus and Peripheral Bus reset lines. 294 */ 295 (void) disable_interrupts(I32_bit|F32_bit); 296 *(volatile uint32_t *)(IQ80321_80321_VBASE + VERDE_ATU_BASE + 297 ATU_PCSR) = PCSR_RIB | PCSR_RPB; 298 299 /* ...and if that didn't work, just croak. */ 300 printf("RESET FAILED!\n"); 301 for (;;); 302 } 303 304 /* Static device mappings. */ 305 static const struct pmap_devmap iq80321_devmap[] = { 306 /* 307 * Map the on-board devices VA == PA so that we can access them 308 * with the MMU on or off. 309 */ 310 DEVMAP_ENTRY( 311 IQ80321_OBIO_BASE, 312 IQ80321_OBIO_BASE, 313 IQ80321_OBIO_SIZE 314 ), 315 316 DEVMAP_ENTRY( 317 IQ80321_IOW_VBASE, 318 VERDE_OUT_XLATE_IO_WIN0_BASE, 319 VERDE_OUT_XLATE_IO_WIN_SIZE 320 ), 321 322 DEVMAP_ENTRY( 323 IQ80321_80321_VBASE, 324 VERDE_PMMR_BASE, 325 VERDE_PMMR_SIZE 326 ), 327 328 DEVMAP_ENTRY_END 329 }; 330 331 static void 332 iq80321_hardclock_hook(void) 333 { 334 static int snakefreq; 335 336 if ((snakefreq++ & 15) == 0) 337 iq80321_7seg_snake(); 338 } 339 340 /* 341 * vaddr_t initarm(...) 342 * 343 * Initial entry point on startup. This gets called before main() is 344 * entered. 345 * It should be responsible for setting up everything that must be 346 * in place when main is called. 347 * This includes 348 * Taking a copy of the boot configuration structure. 349 * Initialising the physical console so characters can be printed. 350 * Setting up page tables for the kernel 351 * Relocating the kernel to the bottom of physical memory 352 */ 353 vaddr_t 354 initarm(void *arg) 355 { 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 iq80321_7seg(' ', ' '); 367 368 /* Calibrate the delay loop. */ 369 i80321_calibrate_delay(); 370 i80321_hardclock_hook = iq80321_hardclock_hook; 371 372 /* 373 * Since we map the on-board devices VA==PA, and the kernel 374 * is running VA==PA, it's possible for us to initialize 375 * the console now. 376 */ 377 consinit(); 378 379 #ifdef VERBOSE_INIT_ARM 380 /* Talk to the user */ 381 printf("\nNetBSD/evbarm (IQ80321) booting ...\n"); 382 #endif 383 384 /* 385 * Heads up ... Setup the CPU / MMU / TLB functions 386 */ 387 if (set_cpufuncs()) 388 panic("CPU not recognized!"); 389 390 /* 391 * We are currently running with the MMU enabled and the 392 * entire address space mapped VA==PA, except for the 393 * first 64M of RAM is also double-mapped at 0xc0000000. 394 * There is an L1 page table at 0xa0004000. 395 */ 396 397 /* 398 * Fetch the SDRAM start/size from the i80321 SDRAM configuration 399 * registers. 400 */ 401 i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE, 402 &memstart, &memsize); 403 404 #ifdef VERBOSE_INIT_ARM 405 printf("initarm: Configuring system ...\n"); 406 #endif 407 408 /* Fake bootconfig structure for the benefit of pmap.c */ 409 /* XXX must make the memory description h/w independent */ 410 bootconfig.dramblocks = 1; 411 bootconfig.dram[0].address = memstart; 412 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 413 414 /* 415 * Set up the variables that define the availability of 416 * physical memory. For now, we're going to set 417 * physical_freestart to 0xa0200000 (where the kernel 418 * was loaded), and allocate the memory we need downwards. 419 * If we get too close to the L1 table that we set up, we 420 * will panic. We will update physical_freestart and 421 * physical_freeend later to reflect what pmap_bootstrap() 422 * wants to see. 423 * 424 * XXX pmap_bootstrap() needs an enema. 425 */ 426 physical_start = bootconfig.dram[0].address; 427 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 428 429 physical_freestart = 0xa0009000UL; 430 physical_freeend = 0xa0200000UL; 431 432 physmem = (physical_end - physical_start) / PAGE_SIZE; 433 434 #ifdef VERBOSE_INIT_ARM 435 /* Tell the user about the memory */ 436 printf("physmemory: %"PRIuPSIZE" pages at 0x%08lx -> 0x%08lx\n", 437 physmem, 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 kernel_l1pt.pv_pa = 0; 484 kernel_l1pt.pv_va = 0; 485 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 486 /* Are we 16KB aligned for an L1 ? */ 487 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 488 && kernel_l1pt.pv_pa == 0) { 489 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 490 } else { 491 valloc_pages(kernel_pt_table[loop1], 492 L2_TABLE_SIZE / PAGE_SIZE); 493 ++loop1; 494 } 495 } 496 497 /* This should never be able to happen but better confirm that. */ 498 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 499 panic("initarm: Failed to align the kernel page directory"); 500 501 /* 502 * Allocate a page for the system page mapped to V0x00000000 503 * This page will just contain the system vectors and can be 504 * shared by all processes. 505 */ 506 alloc_pages(systempage.pv_pa, 1); 507 508 /* Allocate stacks for all modes */ 509 valloc_pages(irqstack, IRQ_STACK_SIZE); 510 valloc_pages(abtstack, ABT_STACK_SIZE); 511 valloc_pages(undstack, UND_STACK_SIZE); 512 valloc_pages(kernelstack, UPAGES); 513 514 /* Allocate enough pages for cleaning the Mini-Data cache. */ 515 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 516 valloc_pages(minidataclean, 1); 517 518 #ifdef VERBOSE_INIT_ARM 519 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 520 irqstack.pv_va); 521 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 522 abtstack.pv_va); 523 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 524 undstack.pv_va); 525 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 526 kernelstack.pv_va); 527 #endif 528 529 /* 530 * XXX Defer this to later so that we can reclaim the memory 531 * XXX used by the RedBoot page tables. 532 */ 533 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 534 535 /* 536 * Ok we have allocated physical pages for the primary kernel 537 * page tables 538 */ 539 540 #ifdef VERBOSE_INIT_ARM 541 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 542 #endif 543 544 /* 545 * Now we start construction of the L1 page table 546 * We start by mapping the L2 page tables into the L1. 547 * This means that we can replace L1 mappings later on if necessary 548 */ 549 l1pagetable = kernel_l1pt.pv_pa; 550 551 /* Map the L2 pages tables in the L1 page table */ 552 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 553 &kernel_pt_table[KERNEL_PT_SYS]); 554 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 555 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 556 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 557 pmap_link_l2pt(l1pagetable, IQ80321_IOPXS_VBASE, 558 &kernel_pt_table[KERNEL_PT_IOPXS]); 559 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 560 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 561 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 562 563 /* update the top of the kernel VM */ 564 pmap_curmaxkvaddr = 565 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 566 567 #ifdef VERBOSE_INIT_ARM 568 printf("Mapping kernel\n"); 569 #endif 570 571 /* Now we fill in the L2 pagetable for the kernel static code/data */ 572 { 573 extern char etext[], _end[]; 574 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 575 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 576 u_int logical; 577 578 textsize = (textsize + PGOFSET) & ~PGOFSET; 579 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 580 581 logical = 0x00200000; /* offset of kernel in RAM */ 582 583 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 584 physical_start + logical, textsize, 585 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 586 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 587 physical_start + logical, totalsize - textsize, 588 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 589 } 590 591 #ifdef VERBOSE_INIT_ARM 592 printf("Constructing L2 page tables\n"); 593 #endif 594 595 /* Map the stack pages */ 596 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 597 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 598 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 599 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 600 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 601 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 602 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 603 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 604 605 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 606 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 607 608 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 609 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 610 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 611 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 612 } 613 614 /* Map the Mini-Data cache clean area. */ 615 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 616 minidataclean.pv_pa); 617 618 /* Map the vector page. */ 619 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 620 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 621 622 /* Map the statically mapped devices. */ 623 pmap_devmap_bootstrap(l1pagetable, iq80321_devmap); 624 625 /* 626 * Give the XScale global cache clean code an appropriately 627 * sized chunk of unmapped VA space starting at 0xff000000 628 * (our device mappings end before this address). 629 */ 630 xscale_cache_clean_addr = 0xff000000U; 631 632 /* 633 * Now we have the real page tables in place so we can switch to them. 634 * Once this is done we will be running with the REAL kernel page 635 * tables. 636 */ 637 638 /* 639 * Update the physical_freestart/physical_freeend/free_pages 640 * variables. 641 */ 642 { 643 extern char _end[]; 644 645 physical_freestart = physical_start + 646 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 647 KERNEL_BASE); 648 physical_freeend = physical_end; 649 free_pages = 650 (physical_freeend - physical_freestart) / PAGE_SIZE; 651 } 652 653 /* Switch tables */ 654 #ifdef VERBOSE_INIT_ARM 655 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 656 physical_freestart, free_pages, free_pages); 657 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 658 #endif 659 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 660 cpu_setttb(kernel_l1pt.pv_pa, true); 661 cpu_tlb_flushID(); 662 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 663 664 /* 665 * Moved from cpu_startup() as data_abort_handler() references 666 * this during uvm init 667 */ 668 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 669 670 #ifdef VERBOSE_INIT_ARM 671 printf("done!\n"); 672 #endif 673 674 #ifdef VERBOSE_INIT_ARM 675 printf("bootstrap done.\n"); 676 #endif 677 678 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 679 680 /* 681 * Pages were allocated during the secondary bootstrap for the 682 * stacks for different CPU modes. 683 * We must now set the r13 registers in the different CPU modes to 684 * point to these stacks. 685 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 686 * of the stack memory. 687 */ 688 #ifdef VERBOSE_INIT_ARM 689 printf("init subsystems: stacks "); 690 #endif 691 692 set_stackptr(PSR_IRQ32_MODE, 693 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 694 set_stackptr(PSR_ABT32_MODE, 695 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 696 set_stackptr(PSR_UND32_MODE, 697 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 698 699 /* 700 * Well we should set a data abort handler. 701 * Once things get going this will change as we will need a proper 702 * handler. 703 * Until then we will use a handler that just panics but tells us 704 * why. 705 * Initialisation of the vectors will just panic on a data abort. 706 * This just fills in a slightly better one. 707 */ 708 #ifdef VERBOSE_INIT_ARM 709 printf("vectors "); 710 #endif 711 data_abort_handler_address = (u_int)data_abort_handler; 712 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 713 undefined_handler_address = (u_int)undefinedinstruction_bounce; 714 715 /* Initialise the undefined instruction handlers */ 716 #ifdef VERBOSE_INIT_ARM 717 printf("undefined "); 718 #endif 719 undefined_init(); 720 721 /* Load memory into UVM. */ 722 #ifdef VERBOSE_INIT_ARM 723 printf("page "); 724 #endif 725 uvm_md_init(); 726 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 727 atop(physical_freestart), atop(physical_freeend), 728 VM_FREELIST_DEFAULT); 729 730 /* Boot strap pmap telling it where managed kernel virtual memory is */ 731 #ifdef VERBOSE_INIT_ARM 732 printf("pmap "); 733 #endif 734 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 735 736 /* Setup the IRQ system */ 737 #ifdef VERBOSE_INIT_ARM 738 printf("irq "); 739 #endif 740 i80321_intr_init(); 741 742 #ifdef VERBOSE_INIT_ARM 743 printf("done.\n"); 744 #endif 745 746 #ifdef BOOTHOWTO 747 boothowto = BOOTHOWTO; 748 #endif 749 750 #ifdef DDB 751 db_machine_init(); 752 if (boothowto & RB_KDB) 753 Debugger(); 754 #endif 755 756 /* We return the new stack pointer address */ 757 return kernelstack.pv_va + USPACE_SVC_STACK_TOP; 758 } 759 760 void 761 consinit(void) 762 { 763 static const bus_addr_t comcnaddrs[] = { 764 IQ80321_UART1, /* com0 */ 765 }; 766 static int consinit_called; 767 768 if (consinit_called != 0) 769 return; 770 771 consinit_called = 1; 772 773 /* 774 * Console devices are mapped VA==PA. Our devmap reflects 775 * this, so register it now so drivers can map the console 776 * device. 777 */ 778 pmap_devmap_register(iq80321_devmap); 779 780 #if NCOM > 0 781 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 782 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 783 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 784 #else 785 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 786 #endif 787 #if KGDB 788 #if NCOM > 0 789 if (strcmp(kgdb_devname, "com") == 0) { 790 com_kgdb_attach(&obio_bs_tag, kgdb_devaddr, kgdb_devrate, 791 COM_FREQ, COM_TYPE_NORMAL, kgdb_devmode); 792 } 793 #endif /* NCOM > 0 */ 794 #endif /* KGDB */ 795 } 796
Indexes created Sun Oct 25 00:26:45 UTC 2026