npwr_fc_machdep.c revision 1.22
1 /* $NetBSD: npwr_fc_machdep.c,v 1.22 2018/07/31 06:46:27 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: npwr_fc_machdep.c,v 1.22 2018/07/31 06:46:27 skrll Exp $"); 77 78 #include "opt_arm_debug.h" 79 #include "opt_ddb.h" 80 #include "opt_kgdb.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 94 #include <uvm/uvm_extern.h> 95 96 #include <dev/cons.h> 97 98 #include <machine/db_machdep.h> 99 #include <ddb/db_sym.h> 100 #include <ddb/db_extern.h> 101 102 #include <machine/bootconfig.h> 103 #include <sys/bus.h> 104 #include <machine/cpu.h> 105 #include <machine/frame.h> 106 #include <arm/undefined.h> 107 108 #include <arm/arm32/machdep.h> 109 110 #include <arm/xscale/i80321reg.h> 111 #include <arm/xscale/i80321var.h> 112 113 #include <dev/pci/ppbreg.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 #ifdef PMAP_DEBUG 152 extern int pmap_debug_level; 153 #endif 154 155 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 156 157 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 158 #define KERNEL_PT_KERNEL_NUM 4 159 160 /* L2 table for mapping i80321 */ 161 #define KERNEL_PT_IOPXS (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 162 163 /* L2 tables for mapping kernel VM */ 164 #define KERNEL_PT_VMDATA (KERNEL_PT_IOPXS + 1) 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 B115200 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 #if KGDB 201 #ifndef KGDB_DEVNAME 202 #error Must define KGDB_DEVNAME 203 #endif 204 const char kgdb_devname[] = KGDB_DEVNAME; 205 206 #ifndef KGDB_DEVADDR 207 #error Must define KGDB_DEVADDR 208 #endif 209 unsigned long kgdb_devaddr = KGDB_DEVADDR; 210 211 #ifndef KGDB_DEVRATE 212 #define KGDB_DEVRATE CONSPEED 213 #endif 214 int kgdb_devrate = KGDB_DEVRATE; 215 216 #ifndef KGDB_DEVMODE 217 #define KGDB_DEVMODE CONMODE 218 #endif 219 int kgdb_devmode = KGDB_DEVMODE; 220 #endif /* KGDB */ 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 printf("The operating system has halted.\n"); 277 printf("Please press any key to reboot.\n\n"); 278 cngetc(); 279 } 280 281 printf("rebooting...\n\r"); 282 reset: 283 /* 284 * Make really really sure that all interrupts are disabled, 285 * and poke the Internal Bus and Peripheral Bus reset lines. 286 */ 287 (void) disable_interrupts(I32_bit|F32_bit); 288 *(volatile uint32_t *)(IQ80321_80321_VBASE + VERDE_ATU_BASE + 289 ATU_PCSR) = PCSR_RIB | PCSR_RPB; 290 291 /* ...and if that didn't work, just croak. */ 292 printf("RESET FAILED!\n"); 293 for (;;); 294 } 295 296 /* Static device mappings. */ 297 static const struct pmap_devmap iq80321_devmap[] = { 298 /* 299 * Map the on-board devices VA == PA so that we can access them 300 * with the MMU on or off. 301 */ 302 { 303 IQ80321_OBIO_BASE, 304 IQ80321_OBIO_BASE, 305 IQ80321_OBIO_SIZE, 306 VM_PROT_READ|VM_PROT_WRITE, 307 PTE_NOCACHE, 308 }, 309 310 { 311 IQ80321_IOW_VBASE, 312 VERDE_OUT_XLATE_IO_WIN0_BASE, 313 VERDE_OUT_XLATE_IO_WIN_SIZE, 314 VM_PROT_READ|VM_PROT_WRITE, 315 PTE_NOCACHE, 316 }, 317 318 { 319 IQ80321_80321_VBASE, 320 VERDE_PMMR_BASE, 321 VERDE_PMMR_SIZE, 322 VM_PROT_READ|VM_PROT_WRITE, 323 PTE_NOCACHE, 324 }, 325 326 { 327 0, 328 0, 329 0, 330 0, 331 0, 332 } 333 }; 334 335 /* 336 * u_int initarm(...) 337 * 338 * Initial entry point on startup. This gets called before main() is 339 * entered. 340 * It should be responsible for setting up everything that must be 341 * in place when main is called. 342 * This includes 343 * Taking a copy of the boot configuration structure. 344 * Initialising the physical console so characters can be printed. 345 * Setting up page tables for the kernel 346 * Relocating the kernel to the bottom of physical memory 347 */ 348 u_int 349 initarm(void *arg) 350 { 351 extern vaddr_t xscale_cache_clean_addr; 352 #ifdef DIAGNOSTIC 353 extern vsize_t xscale_minidata_clean_size; 354 #endif 355 int loop; 356 int loop1; 357 u_int l1pagetable; 358 paddr_t memstart; 359 psize_t memsize; 360 361 /* Calibrate the delay loop. */ 362 i80321_calibrate_delay(); 363 i80321_hardclock_hook = NULL; 364 365 /* 366 * Since we map the on-board devices VA==PA, and the kernel 367 * is running VA==PA, it's possible for us to initialize 368 * the console now. 369 */ 370 consinit(); 371 372 #ifdef VERBOSE_INIT_ARM 373 /* Talk to the user */ 374 printf("\nNetBSD/evbarm (NPWR_FC) booting ...\n"); 375 #endif 376 377 /* 378 * Heads up ... Setup the CPU / MMU / TLB functions 379 */ 380 if (set_cpufuncs()) 381 panic("cpu not recognized!"); 382 383 /* 384 * We are currently running with the MMU enabled and the 385 * entire address space mapped VA==PA, except for the 386 * first 64M of RAM is also double-mapped at 0xc0000000. 387 * There is an L1 page table at 0xa0004000. 388 */ 389 390 /* 391 * Fetch the SDRAM start/size from the i80321 SDRAM configration 392 * registers. 393 */ 394 i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE, 395 &memstart, &memsize); 396 397 #ifdef VERBOSE_INIT_ARM 398 printf("initarm: Configuring system ...\n"); 399 #endif 400 401 /* Fake bootconfig structure for the benefit of pmap.c */ 402 /* XXX must make the memory description h/w independent */ 403 bootconfig.dramblocks = 1; 404 bootconfig.dram[0].address = memstart; 405 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 406 407 /* 408 * Set up the variables that define the availablilty of 409 * physical memory. For now, we're going to set 410 * physical_freestart to 0xa0200000 (where the kernel 411 * was loaded), and allocate the memory we need downwards. 412 * If we get too close to the L1 table that we set up, we 413 * will panic. We will update physical_freestart and 414 * physical_freeend later to reflect what pmap_bootstrap() 415 * wants to see. 416 * 417 * XXX pmap_bootstrap() needs an enema. 418 */ 419 physical_start = bootconfig.dram[0].address; 420 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 421 422 physical_freestart = 0xa0009000UL; 423 physical_freeend = 0xa0200000UL; 424 425 physmem = (physical_end - physical_start) / PAGE_SIZE; 426 427 #ifdef VERBOSE_INIT_ARM 428 /* Tell the user about the memory */ 429 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 430 physical_start, physical_end - 1); 431 #endif 432 433 /* 434 * Okay, the kernel starts 2MB in from the bottom of physical 435 * memory. We are going to allocate our bootstrap pages downwards 436 * from there. 437 * 438 * We need to allocate some fixed page tables to get the kernel 439 * going. We allocate one page directory and a number of page 440 * tables and store the physical addresses in the kernel_pt_table 441 * array. 442 * 443 * The kernel page directory must be on a 16K boundary. The page 444 * tables must be on 4K bounaries. What we do is allocate the 445 * page directory on the first 16K boundary that we encounter, and 446 * the page tables on 4K boundaries otherwise. Since we allocate 447 * at least 3 L2 page tables, we are guaranteed to encounter at 448 * least one 16K aligned region. 449 */ 450 451 #ifdef VERBOSE_INIT_ARM 452 printf("Allocating page tables\n"); 453 #endif 454 455 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 456 457 #ifdef VERBOSE_INIT_ARM 458 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 459 physical_freestart, free_pages, free_pages); 460 #endif 461 462 /* Define a macro to simplify memory allocation */ 463 #define valloc_pages(var, np) \ 464 alloc_pages((var).pv_pa, (np)); \ 465 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 466 467 #define alloc_pages(var, np) \ 468 physical_freeend -= ((np) * PAGE_SIZE); \ 469 if (physical_freeend < physical_freestart) \ 470 panic("initarm: out of memory"); \ 471 (var) = physical_freeend; \ 472 free_pages -= (np); \ 473 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 474 475 loop1 = 0; 476 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 477 /* Are we 16KB aligned for an L1 ? */ 478 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 479 && kernel_l1pt.pv_pa == 0) { 480 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 481 } else { 482 valloc_pages(kernel_pt_table[loop1], 483 L2_TABLE_SIZE / PAGE_SIZE); 484 ++loop1; 485 } 486 } 487 488 /* This should never be able to happen but better confirm that. */ 489 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 490 panic("initarm: Failed to align the kernel page directory"); 491 492 /* 493 * Allocate a page for the system page mapped to V0x00000000 494 * This page will just contain the system vectors and can be 495 * shared by all processes. 496 */ 497 alloc_pages(systempage.pv_pa, 1); 498 499 /* Allocate stacks for all modes */ 500 valloc_pages(irqstack, IRQ_STACK_SIZE); 501 valloc_pages(abtstack, ABT_STACK_SIZE); 502 valloc_pages(undstack, UND_STACK_SIZE); 503 valloc_pages(kernelstack, UPAGES); 504 505 /* Allocate enough pages for cleaning the Mini-Data cache. */ 506 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 507 valloc_pages(minidataclean, 1); 508 509 #ifdef VERBOSE_INIT_ARM 510 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 511 irqstack.pv_va); 512 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 513 abtstack.pv_va); 514 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 515 undstack.pv_va); 516 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 517 kernelstack.pv_va); 518 #endif 519 520 /* 521 * XXX Defer this to later so that we can reclaim the memory 522 * XXX used by the RedBoot page tables. 523 */ 524 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 525 526 /* 527 * Ok we have allocated physical pages for the primary kernel 528 * page tables 529 */ 530 531 #ifdef VERBOSE_INIT_ARM 532 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 533 #endif 534 535 /* 536 * Now we start construction of the L1 page table 537 * We start by mapping the L2 page tables into the L1. 538 * This means that we can replace L1 mappings later on if necessary 539 */ 540 l1pagetable = kernel_l1pt.pv_pa; 541 542 /* Map the L2 pages tables in the L1 page table */ 543 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 544 &kernel_pt_table[KERNEL_PT_SYS]); 545 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 546 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 547 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 548 pmap_link_l2pt(l1pagetable, IQ80321_IOPXS_VBASE, 549 &kernel_pt_table[KERNEL_PT_IOPXS]); 550 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 551 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 552 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 553 554 /* update the top of the kernel VM */ 555 pmap_curmaxkvaddr = 556 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 557 558 #ifdef VERBOSE_INIT_ARM 559 printf("Mapping kernel\n"); 560 #endif 561 562 /* Now we fill in the L2 pagetable for the kernel static code/data */ 563 { 564 extern char etext[], _end[]; 565 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 566 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 567 u_int logical; 568 569 textsize = (textsize + PGOFSET) & ~PGOFSET; 570 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 571 572 logical = 0x00200000; /* offset of kernel in RAM */ 573 574 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 575 physical_start + logical, textsize, 576 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 577 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 578 physical_start + logical, totalsize - textsize, 579 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 580 } 581 582 #ifdef VERBOSE_INIT_ARM 583 printf("Constructing L2 page tables\n"); 584 #endif 585 586 /* Map the stack pages */ 587 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 588 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 589 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 590 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 591 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 592 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 593 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 594 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 595 596 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 597 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 598 599 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 600 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 601 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 602 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 603 } 604 605 /* Map the Mini-Data cache clean area. */ 606 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 607 minidataclean.pv_pa); 608 609 /* Map the vector page. */ 610 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 611 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 612 613 /* Map the statically mapped devices. */ 614 pmap_devmap_bootstrap(l1pagetable, iq80321_devmap); 615 616 /* 617 * Give the XScale global cache clean code an appropriately 618 * sized chunk of unmapped VA space starting at 0xff000000 619 * (our device mappings end before this address). 620 */ 621 xscale_cache_clean_addr = 0xff000000U; 622 623 /* 624 * Now we have the real page tables in place so we can switch to them. 625 * Once this is done we will be running with the REAL kernel page 626 * tables. 627 */ 628 629 /* 630 * Update the physical_freestart/physical_freeend/free_pages 631 * variables. 632 */ 633 { 634 extern char _end[]; 635 636 physical_freestart = physical_start + 637 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 638 KERNEL_BASE); 639 physical_freeend = physical_end; 640 free_pages = 641 (physical_freeend - physical_freestart) / PAGE_SIZE; 642 } 643 644 /* Switch tables */ 645 #ifdef VERBOSE_INIT_ARM 646 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 647 physical_freestart, free_pages, free_pages); 648 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 649 #endif 650 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 651 cpu_setttb(kernel_l1pt.pv_pa, true); 652 cpu_tlb_flushID(); 653 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 654 655 /* 656 * Moved from cpu_startup() as data_abort_handler() references 657 * this during uvm init 658 */ 659 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 660 661 #ifdef VERBOSE_INIT_ARM 662 printf("done!\n"); 663 #endif 664 665 #ifdef VERBOSE_INIT_ARM 666 printf("bootstrap done.\n"); 667 #endif 668 669 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 670 671 /* 672 * Pages were allocated during the secondary bootstrap for the 673 * stacks for different CPU modes. 674 * We must now set the r13 registers in the different CPU modes to 675 * point to these stacks. 676 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 677 * of the stack memory. 678 */ 679 #ifdef VERBOSE_INIT_ARM 680 printf("init subsystems: stacks "); 681 #endif 682 683 set_stackptr(PSR_IRQ32_MODE, 684 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 685 set_stackptr(PSR_ABT32_MODE, 686 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 687 set_stackptr(PSR_UND32_MODE, 688 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 689 690 /* 691 * Well we should set a data abort handler. 692 * Once things get going this will change as we will need a proper 693 * handler. 694 * Until then we will use a handler that just panics but tells us 695 * why. 696 * Initialisation of the vectors will just panic on a data abort. 697 * This just fills in a slighly better one. 698 */ 699 #ifdef VERBOSE_INIT_ARM 700 printf("vectors "); 701 #endif 702 data_abort_handler_address = (u_int)data_abort_handler; 703 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 704 undefined_handler_address = (u_int)undefinedinstruction_bounce; 705 706 /* Initialise the undefined instruction handlers */ 707 #ifdef VERBOSE_INIT_ARM 708 printf("undefined "); 709 #endif 710 undefined_init(); 711 712 /* Load memory into UVM. */ 713 #ifdef VERBOSE_INIT_ARM 714 printf("page "); 715 #endif 716 uvm_md_init(); 717 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 718 atop(physical_freestart), atop(physical_freeend), 719 VM_FREELIST_DEFAULT); 720 721 /* Boot strap pmap telling it where the kernel page table is */ 722 #ifdef VERBOSE_INIT_ARM 723 printf("pmap "); 724 #endif 725 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 726 727 /* Setup the IRQ system */ 728 #ifdef VERBOSE_INIT_ARM 729 printf("irq "); 730 #endif 731 i80321_intr_init(); 732 733 #ifdef VERBOSE_INIT_ARM 734 printf("done.\n"); 735 #endif 736 737 #ifdef BOOTHOWTO 738 boothowto = BOOTHOWTO; 739 #endif 740 741 #ifdef DDB 742 db_machine_init(); 743 if (boothowto & RB_KDB) 744 Debugger(); 745 #endif 746 747 /* We return the new stack pointer address */ 748 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 749 } 750 751 void 752 consinit(void) 753 { 754 static const bus_addr_t comcnaddrs[] = { 755 IQ80321_UART1, /* com0 */ 756 }; 757 static int consinit_called; 758 759 if (consinit_called != 0) 760 return; 761 762 consinit_called = 1; 763 764 /* 765 * Console devices are mapped VA==PA. Our devmap reflects 766 * this, so register it now so drivers can map the console 767 * device. 768 */ 769 pmap_devmap_register(iq80321_devmap); 770 771 #if NCOM > 0 772 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 773 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 774 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 775 #else 776 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 777 #endif 778 #if KGDB 779 #if NCOM > 0 780 if (strcmp(kgdb_devname, "com") == 0) { 781 com_kgdb_attach(&obio_bs_tag, kgdb_devaddr, kgdb_devrate, 782 COM_FREQ, COM_TYPE_NORMAL, kgdb_devmode); 783 } 784 #endif /* NCOM > 0 */ 785 #endif /* KGDB */ 786 } 787
Indexes created Wed Oct 22 13:09:56 GMT 2025