ixdp425_machdep.c revision 1.44
1 /* $NetBSD: ixdp425_machdep.c,v 1.44 2020/04/18 10:55:45 skrll Exp $ */ 2 /* 3 * Copyright (c) 2003 4 * Ichiro FUKUHARA <ichiro (at) ichiro.org>. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR 20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 /* 29 * Copyright (c) 1997,1998 Mark Brinicombe. 30 * Copyright (c) 1997,1998 Causality Limited. 31 * All rights reserved. 32 * 33 * Redistribution and use in source and binary forms, with or without 34 * modification, are permitted provided that the following conditions 35 * are met: 36 * 1. Redistributions of source code must retain the above copyright 37 * notice, this list of conditions and the following disclaimer. 38 * 2. Redistributions in binary form must reproduce the above copyright 39 * notice, this list of conditions and the following disclaimer in the 40 * documentation and/or other materials provided with the distribution. 41 * 3. All advertising materials mentioning features or use of this software 42 * must display the following acknowledgement: 43 * This product includes software developed by Mark Brinicombe 44 * for the NetBSD Project. 45 * 4. The name of the company nor the name of the author may be used to 46 * endorse or promote products derived from this software without specific 47 * prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 50 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 51 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 52 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 53 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 54 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 55 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 */ 61 62 /* Machine dependent functions for kernel setup for Intel IXP425 evaluation 63 * boards using RedBoot firmware. 64 */ 65 66 #include <sys/cdefs.h> 67 __KERNEL_RCSID(0, "$NetBSD: ixdp425_machdep.c,v 1.44 2020/04/18 10:55:45 skrll Exp $"); 68 69 #include "opt_arm_debug.h" 70 #include "opt_console.h" 71 #include "opt_ddb.h" 72 #include "opt_kgdb.h" 73 #include "opt_pmap_debug.h" 74 75 #include <sys/param.h> 76 #include <sys/device.h> 77 #include <sys/systm.h> 78 #include <sys/kernel.h> 79 #include <sys/exec.h> 80 #include <sys/proc.h> 81 #include <sys/msgbuf.h> 82 #include <sys/reboot.h> 83 #include <sys/termios.h> 84 #include <sys/ksyms.h> 85 #include <sys/bus.h> 86 #include <sys/cpu.h> 87 88 #include <uvm/uvm_extern.h> 89 90 #include <dev/cons.h> 91 92 #include <machine/db_machdep.h> 93 #include <ddb/db_sym.h> 94 #include <ddb/db_extern.h> 95 96 #include <machine/bootconfig.h> 97 #include <arm/locore.h> 98 #include <arm/undefined.h> 99 100 #include <arm/arm32/machdep.h> 101 102 #include <arm/xscale/ixp425reg.h> 103 #include <arm/xscale/ixp425var.h> 104 #include <arm/xscale/ixp425_sipvar.h> 105 106 #include <evbarm/ixdp425/ixdp425reg.h> 107 108 #include "com.h" 109 #if NCOM > 0 110 #include <dev/ic/comreg.h> 111 #include <dev/ic/comvar.h> 112 #endif 113 114 #include "ksyms.h" 115 116 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 117 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 118 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 119 120 /* 121 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 122 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 123 */ 124 #define KERNEL_VM_SIZE 0x0C000000 125 126 BootConfig bootconfig; /* Boot config storage */ 127 char *boot_args = NULL; 128 char *boot_file = NULL; 129 130 vaddr_t physical_start; 131 vaddr_t physical_freestart; 132 vaddr_t physical_freeend; 133 vaddr_t physical_end; 134 u_int free_pages; 135 136 /* Physical and virtual addresses for some global pages */ 137 pv_addr_t minidataclean; 138 139 paddr_t msgbufphys; 140 141 extern int end; 142 143 #ifdef PMAP_DEBUG 144 extern int pmap_debug_level; 145 #endif 146 147 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 148 149 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 150 #define KERNEL_PT_KERNEL_NUM 4 151 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 152 /* L2 tables for mapping kernel VM */ 153 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1) 154 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 155 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 156 157 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 158 159 /* Prototypes */ 160 161 void consinit(void); 162 u_int cpu_get_control(void); 163 164 /* 165 * Define the default console speed for the board. This is generally 166 * what the firmware provided with the board defaults to. 167 */ 168 #ifndef CONSPEED 169 #define CONSPEED B115200 170 #endif /* ! CONSPEED */ 171 172 #ifndef CONUNIT 173 #define CONUNIT 0 174 #endif 175 176 #ifndef CONMODE 177 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */ 178 #endif 179 180 int comcnspeed = CONSPEED; 181 int comcnmode = CONMODE; 182 int comcnunit = CONUNIT; 183 184 #if KGDB 185 #ifndef KGDB_DEVNAME 186 #error Must define KGDB_DEVNAME 187 #endif 188 const char kgdb_devname[] = KGDB_DEVNAME; 189 190 #ifndef KGDB_DEVADDR 191 #error Must define KGDB_DEVADDR 192 #endif 193 unsigned long kgdb_devaddr = KGDB_DEVADDR; 194 195 #ifndef KGDB_DEVRATE 196 #define KGDB_DEVRATE CONSPEED 197 #endif 198 int kgdb_devrate = KGDB_DEVRATE; 199 200 #ifndef KGDB_DEVMODE 201 #define KGDB_DEVMODE CONMODE 202 #endif 203 int kgdb_devmode = KGDB_DEVMODE; 204 #endif /* KGDB */ 205 206 /* 207 * void cpu_reboot(int howto, char *bootstr) 208 * 209 * Reboots the system 210 * 211 * Deal with any syncing, unmounting, dumping and shutdown hooks, 212 * then reset the CPU. 213 */ 214 void 215 cpu_reboot(int howto, char *bootstr) 216 { 217 uint32_t reg; 218 219 #ifdef DIAGNOSTIC 220 /* info */ 221 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 222 #endif 223 224 /* 225 * If we are still cold then hit the air brakes 226 * and crash to earth fast 227 */ 228 if (cold) { 229 doshutdownhooks(); 230 pmf_system_shutdown(boothowto); 231 printf("The operating system has halted.\n"); 232 printf("Please press any key to reboot.\n\n"); 233 cngetc(); 234 printf("rebooting...\n"); 235 goto reset; 236 } 237 238 /* Disable console buffering */ 239 240 /* 241 * If RB_NOSYNC was not specified sync the discs. 242 * Note: Unless cold is set to 1 here, syslogd will die during the 243 * unmount. It looks like syslogd is getting woken up only to find 244 * that it cannot page part of the binary in as the filesystem has 245 * been unmounted. 246 */ 247 if (!(howto & RB_NOSYNC)) 248 bootsync(); 249 250 /* Say NO to interrupts */ 251 splhigh(); 252 253 /* Do a dump if requested. */ 254 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 255 dumpsys(); 256 257 /* Run any shutdown hooks */ 258 doshutdownhooks(); 259 260 pmf_system_shutdown(boothowto); 261 262 /* Make sure IRQ's are disabled */ 263 IRQdisable; 264 265 if (howto & RB_HALT) { 266 printf("The operating system has halted.\n"); 267 printf("Please press any key to reboot.\n\n"); 268 cngetc(); 269 } 270 271 printf("rebooting...\n\r"); 272 reset: 273 /* 274 * Make really really sure that all interrupts are disabled, 275 */ 276 (void) disable_interrupts(I32_bit|F32_bit); 277 IXPREG(IXP425_INT_ENABLE) = 0; 278 279 /* 280 * Map the boot Flash device down at physical address 0. 281 * This is safe since NetBSD runs out of an alias of 282 * SDRAM at 0x10000000. 283 */ 284 reg = EXP_CSR_READ_4(ixpsip_softc, EXP_CNFG0_OFFSET); 285 reg |= EXP_CNFG0_MEM_MAP; 286 EXP_CSR_WRITE_4(ixpsip_softc, EXP_CNFG0_OFFSET, reg); 287 288 /* 289 * Jump into the bootcode's reset vector 290 * 291 * XXX: 292 * Redboot doesn't like the state in which we leave the PCI 293 * ethernet card, and so fails to detect it on reboot. This 294 * pretty much necessitates a hard reset/power cycle to be 295 * able to download a new kernel image over ethernet. 296 * 297 * I suspect this is due to a bug in Redboot's i82557 driver. 298 */ 299 cpu_reset(); 300 301 /* ...and if that didn't work, just croak. */ 302 printf("RESET FAILED!\n"); 303 for (;;); 304 } 305 306 /* Static device mappings. */ 307 static const struct pmap_devmap ixp425_devmap[] = { 308 /* Physical/Virtual address for I/O space */ 309 { 310 IXP425_IO_VBASE, 311 IXP425_IO_HWBASE, 312 IXP425_IO_SIZE, 313 VM_PROT_READ|VM_PROT_WRITE, 314 PTE_NOCACHE, 315 }, 316 317 /* Expansion Bus */ 318 { 319 IXP425_EXP_VBASE, 320 IXP425_EXP_HWBASE, 321 IXP425_EXP_SIZE, 322 VM_PROT_READ|VM_PROT_WRITE, 323 PTE_NOCACHE, 324 }, 325 326 /* IXP425 PCI Configuration */ 327 { 328 IXP425_PCI_VBASE, 329 IXP425_PCI_HWBASE, 330 IXP425_PCI_SIZE, 331 VM_PROT_READ|VM_PROT_WRITE, 332 PTE_NOCACHE, 333 }, 334 335 /* SDRAM Controller */ 336 { 337 IXP425_MCU_VBASE, 338 IXP425_MCU_HWBASE, 339 IXP425_MCU_SIZE, 340 VM_PROT_READ|VM_PROT_WRITE, 341 PTE_NOCACHE, 342 }, 343 344 /* PCI Memory Space */ 345 { 346 IXP425_PCI_MEM_VBASE, 347 IXP425_PCI_MEM_HWBASE, 348 IXP425_PCI_MEM_SIZE, 349 VM_PROT_READ|VM_PROT_WRITE, 350 PTE_NOCACHE, 351 }, 352 353 { 354 0, 355 0, 356 0, 357 0, 358 0, 359 } 360 }; 361 362 /* 363 * vaddr_t initarm(...) 364 * 365 * Initial entry point on startup. This gets called before main() is 366 * entered. 367 * It should be responsible for setting up everything that must be 368 * in place when main is called. 369 * This includes 370 * Taking a copy of the boot configuration structure. 371 * Initialising the physical console so characters can be printed. 372 * Setting up page tables for the kernel 373 * Relocating the kernel to the bottom of physical memory 374 */ 375 vaddr_t 376 initarm(void *arg) 377 { 378 extern vaddr_t xscale_cache_clean_addr; 379 #ifdef DIAGNOSTIC 380 extern vsize_t xscale_minidata_clean_size; 381 #endif 382 int loop; 383 int loop1; 384 u_int kerneldatasize; 385 u_int l1pagetable; 386 u_int freemempos; 387 388 /* 389 * Since we map v0xf0000000 == p0xc8000000, it's possible for 390 * us to initialize the console now. 391 */ 392 consinit(); 393 394 #ifdef VERBOSE_INIT_ARM 395 /* Talk to the user */ 396 printf("\nNetBSD/evbarm (Intel IXDP425) booting ...\n"); 397 #endif 398 399 /* 400 * Heads up ... Setup the CPU / MMU / TLB functions 401 */ 402 if (set_cpufuncs()) 403 panic("cpu not recognized!"); 404 405 /* XXX overwrite bootconfig to hardcoded values */ 406 bootconfig.dramblocks = 1; 407 bootconfig.dram[0].address = 0x10000000; 408 bootconfig.dram[0].pages = ixp425_sdram_size() / PAGE_SIZE; 409 410 kerneldatasize = (uint32_t)&end - (uint32_t)KERNEL_TEXT_BASE; 411 412 #ifdef VERBOSE_INIT_ARM 413 printf("kernsize=0x%x\n", kerneldatasize); 414 #endif 415 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 416 417 /* 418 * Set up the variables that define the availablilty of 419 * physical memory. For now, we're going to set 420 * physical_freestart to 0x10200000 (where the kernel 421 * was loaded), and allocate the memory we need downwards. 422 * If we get too close to the L1 table that we set up, we 423 * will panic. We will update physical_freestart and 424 * physical_freeend later to reflect what pmap_bootstrap() 425 * wants to see. 426 * 427 * XXX pmap_bootstrap() needs an enema. 428 */ 429 physical_start = bootconfig.dram[0].address; 430 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 431 432 physical_freestart = physical_start 433 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 434 physical_freeend = physical_end; 435 436 physmem = (physical_end - physical_start) / PAGE_SIZE; 437 438 /* Tell the user about the memory */ 439 #ifdef VERBOSE_INIT_ARM 440 printf("physmemory: %"PRIuPSIZE" pages at 0x%08lx -> 0x%08lx\n", physmem, 441 physical_start, physical_end - 1); 442 443 printf("Allocating page tables\n"); 444 #endif 445 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 446 447 freemempos = 0x10000000; 448 449 #ifdef VERBOSE_INIT_ARM 450 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 451 physical_start, physical_end); 452 #endif 453 454 /* Define a macro to simplify memory allocation */ 455 #define valloc_pages(var, np) \ 456 alloc_pages((var).pv_pa, (np)); \ 457 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 458 459 #if 0 460 #define alloc_pages(var, np) \ 461 physical_freeend -= ((np) * PAGE_SIZE); \ 462 if (physical_freeend < physical_freestart) \ 463 panic("initarm: out of memory"); \ 464 (var) = physical_freeend; \ 465 free_pages -= (np); \ 466 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 467 #else 468 #define alloc_pages(var, np) \ 469 (var) = freemempos; \ 470 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 471 freemempos += (np) * PAGE_SIZE; 472 #endif 473 474 loop1 = 0; 475 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 476 /* Are we 16KB aligned for an L1 ? */ 477 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 478 && kernel_l1pt.pv_pa == 0) { 479 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 480 } else { 481 valloc_pages(kernel_pt_table[loop1], 482 L2_TABLE_SIZE / PAGE_SIZE); 483 ++loop1; 484 } 485 } 486 487 /* This should never be able to happen but better confirm that. */ 488 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 489 panic("initarm: Failed to align the kernel page directory"); 490 491 /* 492 * Allocate a page for the system page. 493 * This page will just contain the system vectors and can be 494 * shared by all processes. 495 */ 496 alloc_pages(systempage.pv_pa, 1); 497 498 /* Allocate stacks for all modes */ 499 valloc_pages(irqstack, IRQ_STACK_SIZE); 500 valloc_pages(abtstack, ABT_STACK_SIZE); 501 valloc_pages(undstack, UND_STACK_SIZE); 502 valloc_pages(kernelstack, UPAGES); 503 504 /* Allocate enough pages for cleaning the Mini-Data cache. */ 505 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 506 valloc_pages(minidataclean, 1); 507 508 #ifdef VERBOSE_INIT_ARM 509 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 510 irqstack.pv_va); 511 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 512 abtstack.pv_va); 513 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 514 undstack.pv_va); 515 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 516 kernelstack.pv_va); 517 #endif 518 519 /* 520 * XXX Defer this to later so that we can reclaim the memory 521 * XXX used by the RedBoot page tables. 522 */ 523 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 524 525 /* 526 * Ok we have allocated physical pages for the primary kernel 527 * page tables 528 */ 529 530 #ifdef VERBOSE_INIT_ARM 531 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 532 #endif 533 534 /* 535 * Now we start construction of the L1 page table 536 * We start by mapping the L2 page tables into the L1. 537 * This means that we can replace L1 mappings later on if necessary 538 */ 539 l1pagetable = kernel_l1pt.pv_pa; 540 541 /* Map the L2 pages tables in the L1 page table */ 542 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 543 &kernel_pt_table[KERNEL_PT_SYS]); 544 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 545 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 546 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 547 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 548 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 549 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 550 551 /* update the top of the kernel VM */ 552 pmap_curmaxkvaddr = 553 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 554 555 pmap_link_l2pt(l1pagetable, IXP425_IO_VBASE, 556 &kernel_pt_table[KERNEL_PT_IO]); 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 /* 614 * Map the IXP425 registers 615 */ 616 pmap_devmap_bootstrap(l1pagetable, ixp425_devmap); 617 618 /* 619 * Give the XScale global cache clean code an appropriately 620 * sized chunk of unmapped VA space starting at 0xff000000 621 * (our device mappings end before this address). 622 */ 623 xscale_cache_clean_addr = 0xff000000U; 624 625 /* 626 * Now we have the real page tables in place so we can switch to them. 627 * Once this is done we will be running with the REAL kernel page 628 * tables. 629 */ 630 631 /* 632 * Update the physical_freestart/physical_freeend/free_pages 633 * variables. 634 */ 635 { 636 extern char _end[]; 637 638 physical_freestart = physical_start + 639 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 640 KERNEL_BASE); 641 physical_freeend = physical_end; 642 free_pages = 643 (physical_freeend - physical_freestart) / PAGE_SIZE; 644 } 645 646 /* Switch tables */ 647 #ifdef VERBOSE_INIT_ARM 648 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 649 physical_freestart, free_pages, free_pages); 650 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 651 #endif 652 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 653 cpu_setttb(kernel_l1pt.pv_pa, true); 654 cpu_tlb_flushID(); 655 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 656 657 /* 658 * Moved from cpu_startup() as data_abort_handler() references 659 * this during uvm init 660 */ 661 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 662 663 #ifdef VERBOSE_INIT_ARM 664 printf("bootstrap done.\n"); 665 #endif 666 667 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 668 669 /* 670 * Pages were allocated during the secondary bootstrap for the 671 * stacks for different CPU modes. 672 * We must now set the r13 registers in the different CPU modes to 673 * point to these stacks. 674 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 675 * of the stack memory. 676 */ 677 #ifdef VERBOSE_INIT_ARM 678 printf("init subsystems: stacks "); 679 #endif 680 681 set_stackptr(PSR_IRQ32_MODE, 682 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 683 set_stackptr(PSR_ABT32_MODE, 684 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 685 set_stackptr(PSR_UND32_MODE, 686 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 687 688 /* 689 * Well we should set a data abort handler. 690 * Once things get going this will change as we will need a proper 691 * handler. 692 * Until then we will use a handler that just panics but tells us 693 * why. 694 * Initialisation of the vectors will just panic on a data abort. 695 * This just fills in a slightly better one. 696 */ 697 #ifdef VERBOSE_INIT_ARM 698 printf("vectors "); 699 #endif 700 data_abort_handler_address = (u_int)data_abort_handler; 701 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 702 undefined_handler_address = (u_int)undefinedinstruction_bounce; 703 704 /* Initialise the undefined instruction handlers */ 705 #ifdef VERBOSE_INIT_ARM 706 printf("undefined "); 707 #endif 708 undefined_init(); 709 710 /* Load memory into UVM. */ 711 #ifdef VERBOSE_INIT_ARM 712 printf("page "); 713 #endif 714 uvm_md_init(); 715 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 716 atop(physical_freestart), atop(physical_freeend), 717 VM_FREELIST_DEFAULT); 718 719 /* Boot strap pmap telling it where managed kernel virtual memory is */ 720 #ifdef VERBOSE_INIT_ARM 721 printf("pmap "); 722 #endif 723 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 724 725 /* Setup the IRQ system */ 726 #ifdef VERBOSE_INIT_ARM 727 printf("irq "); 728 #endif 729 ixp425_intr_init(); 730 #ifdef VERBOSE_INIT_ARM 731 printf("\nAll initialization done!\nNow Starting NetBSD, Here we go!\n"); 732 #endif 733 734 #ifdef BOOTHOWTO 735 boothowto = BOOTHOWTO; 736 #endif 737 738 #ifdef DDB 739 db_machine_init(); 740 if (boothowto & RB_KDB) 741 Debugger(); 742 #endif 743 744 /* We return the new stack pointer address */ 745 return kernelstack.pv_va + USPACE_SVC_STACK_TOP; 746 } 747 748 /* 749 * consinit 750 */ 751 void 752 consinit(void) 753 { 754 static int consinit_called; 755 static const bus_addr_t addrs[2] = { 756 IXP425_UART0_HWBASE, IXP425_UART1_HWBASE 757 }; 758 759 if (consinit_called != 0) 760 return; 761 762 consinit_called = 1; 763 764 pmap_devmap_register(ixp425_devmap); 765 766 if (comcnattach(&ixp425_a4x_bs_tag, addrs[comcnunit], 767 comcnspeed, IXP425_UART_FREQ, COM_TYPE_PXA2x0, comcnmode)) 768 panic("can't init serial console (UART%d)", comcnunit); 769 } 770
Indexes created Sat Oct 11 19:10:01 GMT 2025