1 /* $NetBSD: ixdp425_machdep.c,v 1.47 2023/10/12 11:33:38 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 1.47 2023/10/12 11:33:38 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 74 #include <sys/param.h> 75 #include <sys/device.h> 76 #include <sys/systm.h> 77 #include <sys/kernel.h> 78 #include <sys/exec.h> 79 #include <sys/proc.h> 80 #include <sys/msgbuf.h> 81 #include <sys/reboot.h> 82 #include <sys/termios.h> 83 #include <sys/ksyms.h> 84 #include <sys/bus.h> 85 #include <sys/cpu.h> 86 87 #include <uvm/uvm_extern.h> 88 89 #include <dev/cons.h> 90 91 #include <machine/db_machdep.h> 92 #include <ddb/db_sym.h> 93 #include <ddb/db_extern.h> 94 95 #include <machine/bootconfig.h> 96 #include <arm/locore.h> 97 #include <arm/undefined.h> 98 99 #include <arm/arm32/machdep.h> 100 101 #include <arm/xscale/ixp425reg.h> 102 #include <arm/xscale/ixp425var.h> 103 #include <arm/xscale/ixp425_sipvar.h> 104 105 #include <evbarm/ixdp425/ixdp425reg.h> 106 107 #include "com.h" 108 #if NCOM > 0 109 #include <dev/ic/comreg.h> 110 #include <dev/ic/comvar.h> 111 #endif 112 113 #include "ksyms.h" 114 115 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 116 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 117 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 118 119 /* 120 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 121 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 122 */ 123 #define KERNEL_VM_SIZE 0x0C000000 124 125 BootConfig bootconfig; /* Boot config storage */ 126 char *boot_args = NULL; 127 char *boot_file = NULL; 128 129 vaddr_t physical_start; 130 vaddr_t physical_freestart; 131 vaddr_t physical_freeend; 132 vaddr_t physical_end; 133 u_int free_pages; 134 135 /* Physical and virtual addresses for some global pages */ 136 pv_addr_t minidataclean; 137 138 paddr_t msgbufphys; 139 140 extern int end; 141 142 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 143 144 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 145 #define KERNEL_PT_KERNEL_NUM 4 146 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 147 /* L2 tables for mapping kernel VM */ 148 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1) 149 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 150 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 151 152 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 153 154 /* Prototypes */ 155 156 void consinit(void); 157 u_int cpu_get_control(void); 158 159 /* 160 * Define the default console speed for the board. This is generally 161 * what the firmware provided with the board defaults to. 162 */ 163 #ifndef CONSPEED 164 #define CONSPEED B115200 165 #endif /* ! CONSPEED */ 166 167 #ifndef CONUNIT 168 #define CONUNIT 0 169 #endif 170 171 #ifndef CONMODE 172 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */ 173 #endif 174 175 int comcnspeed = CONSPEED; 176 int comcnmode = CONMODE; 177 int comcnunit = CONUNIT; 178 179 #if KGDB 180 #ifndef KGDB_DEVNAME 181 #error Must define KGDB_DEVNAME 182 #endif 183 const char kgdb_devname[] = KGDB_DEVNAME; 184 185 #ifndef KGDB_DEVADDR 186 #error Must define KGDB_DEVADDR 187 #endif 188 unsigned long kgdb_devaddr = KGDB_DEVADDR; 189 190 #ifndef KGDB_DEVRATE 191 #define KGDB_DEVRATE CONSPEED 192 #endif 193 int kgdb_devrate = KGDB_DEVRATE; 194 195 #ifndef KGDB_DEVMODE 196 #define KGDB_DEVMODE CONMODE 197 #endif 198 int kgdb_devmode = KGDB_DEVMODE; 199 #endif /* KGDB */ 200 201 /* 202 * void cpu_reboot(int howto, char *bootstr) 203 * 204 * Reboots the system 205 * 206 * Deal with any syncing, unmounting, dumping and shutdown hooks, 207 * then reset the CPU. 208 */ 209 void 210 cpu_reboot(int howto, char *bootstr) 211 { 212 uint32_t reg; 213 214 #ifdef DIAGNOSTIC 215 /* info */ 216 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 217 #endif 218 219 /* 220 * If we are still cold then hit the air brakes 221 * and crash to earth fast 222 */ 223 if (cold) { 224 doshutdownhooks(); 225 pmf_system_shutdown(boothowto); 226 printf("The operating system has halted.\n"); 227 printf("Please press any key to reboot.\n\n"); 228 cngetc(); 229 printf("rebooting...\n"); 230 goto reset; 231 } 232 233 /* Disable console buffering */ 234 235 /* 236 * If RB_NOSYNC was not specified sync the discs. 237 * Note: Unless cold is set to 1 here, syslogd will die during the 238 * unmount. It looks like syslogd is getting woken up only to find 239 * that it cannot page part of the binary in as the filesystem has 240 * been unmounted. 241 */ 242 if (!(howto & RB_NOSYNC)) 243 bootsync(); 244 245 /* Say NO to interrupts */ 246 splhigh(); 247 248 /* Do a dump if requested. */ 249 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 250 dumpsys(); 251 252 /* Run any shutdown hooks */ 253 doshutdownhooks(); 254 255 pmf_system_shutdown(boothowto); 256 257 /* Make sure IRQ's are disabled */ 258 IRQdisable; 259 260 if (howto & RB_HALT) { 261 printf("The operating system has halted.\n"); 262 printf("Please press any key to reboot.\n\n"); 263 cngetc(); 264 } 265 266 printf("rebooting...\n\r"); 267 reset: 268 /* 269 * Make really really sure that all interrupts are disabled, 270 */ 271 (void) disable_interrupts(I32_bit|F32_bit); 272 IXPREG(IXP425_INT_ENABLE) = 0; 273 274 /* 275 * Map the boot Flash device down at physical address 0. 276 * This is safe since NetBSD runs out of an alias of 277 * SDRAM at 0x10000000. 278 */ 279 reg = EXP_CSR_READ_4(ixpsip_softc, EXP_CNFG0_OFFSET); 280 reg |= EXP_CNFG0_MEM_MAP; 281 EXP_CSR_WRITE_4(ixpsip_softc, EXP_CNFG0_OFFSET, reg); 282 283 /* 284 * Jump into the bootcode's reset vector 285 * 286 * XXX: 287 * Redboot doesn't like the state in which we leave the PCI 288 * ethernet card, and so fails to detect it on reboot. This 289 * pretty much necessitates a hard reset/power cycle to be 290 * able to download a new kernel image over ethernet. 291 * 292 * I suspect this is due to a bug in Redboot's i82557 driver. 293 */ 294 cpu_reset(); 295 296 /* ...and if that didn't work, just croak. */ 297 printf("RESET FAILED!\n"); 298 for (;;); 299 } 300 301 /* Static device mappings. */ 302 static const struct pmap_devmap ixp425_devmap[] = { 303 /* Physical/Virtual address for I/O space */ 304 { 305 IXP425_IO_VBASE, 306 IXP425_IO_HWBASE, 307 IXP425_IO_SIZE, 308 VM_PROT_READ|VM_PROT_WRITE, 309 PTE_NOCACHE, 310 }, 311 312 /* Expansion Bus */ 313 { 314 IXP425_EXP_VBASE, 315 IXP425_EXP_HWBASE, 316 IXP425_EXP_SIZE, 317 VM_PROT_READ|VM_PROT_WRITE, 318 PTE_NOCACHE, 319 }, 320 321 /* IXP425 PCI Configuration */ 322 { 323 IXP425_PCI_VBASE, 324 IXP425_PCI_HWBASE, 325 IXP425_PCI_SIZE, 326 VM_PROT_READ|VM_PROT_WRITE, 327 PTE_NOCACHE, 328 }, 329 330 /* SDRAM Controller */ 331 { 332 IXP425_MCU_VBASE, 333 IXP425_MCU_HWBASE, 334 IXP425_MCU_SIZE, 335 VM_PROT_READ|VM_PROT_WRITE, 336 PTE_NOCACHE, 337 }, 338 339 /* PCI Memory Space */ 340 { 341 IXP425_PCI_MEM_VBASE, 342 IXP425_PCI_MEM_HWBASE, 343 IXP425_PCI_MEM_SIZE, 344 VM_PROT_READ|VM_PROT_WRITE, 345 PTE_NOCACHE, 346 }, 347 348 { 349 0, 350 0, 351 0, 352 0, 353 0, 354 } 355 }; 356 357 /* 358 * vaddr_t initarm(...) 359 * 360 * Initial entry point on startup. This gets called before main() is 361 * entered. 362 * It should be responsible for setting up everything that must be 363 * in place when main is called. 364 * This includes 365 * Taking a copy of the boot configuration structure. 366 * Initialising the physical console so characters can be printed. 367 * Setting up page tables for the kernel 368 * Relocating the kernel to the bottom of physical memory 369 */ 370 vaddr_t 371 initarm(void *arg) 372 { 373 int loop; 374 int loop1; 375 u_int kerneldatasize; 376 u_int l1pagetable; 377 u_int freemempos; 378 379 /* 380 * Since we map v0xf0000000 == p0xc8000000, it's possible for 381 * us to initialize the console now. 382 */ 383 consinit(); 384 385 #ifdef VERBOSE_INIT_ARM 386 /* Talk to the user */ 387 printf("\nNetBSD/evbarm (Intel IXDP425) booting ...\n"); 388 #endif 389 390 /* 391 * Heads up ... Setup the CPU / MMU / TLB functions 392 */ 393 if (set_cpufuncs()) 394 panic("cpu not recognized!"); 395 396 /* XXX overwrite bootconfig to hardcoded values */ 397 bootconfig.dramblocks = 1; 398 bootconfig.dram[0].address = 0x10000000; 399 bootconfig.dram[0].pages = ixp425_sdram_size() / PAGE_SIZE; 400 401 kerneldatasize = (uint32_t)&end - (uint32_t)KERNEL_TEXT_BASE; 402 403 #ifdef VERBOSE_INIT_ARM 404 printf("kernsize=0x%x\n", kerneldatasize); 405 #endif 406 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 407 408 /* 409 * Set up the variables that define the availability of 410 * physical memory. For now, we're going to set 411 * physical_freestart to 0x10200000 (where the kernel 412 * was loaded), and allocate the memory we need downwards. 413 * If we get too close to the L1 table that we set up, we 414 * will panic. We will update physical_freestart and 415 * physical_freeend later to reflect what pmap_bootstrap() 416 * wants to see. 417 * 418 * XXX pmap_bootstrap() needs an enema. 419 */ 420 physical_start = bootconfig.dram[0].address; 421 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 422 423 physical_freestart = physical_start 424 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 425 physical_freeend = physical_end; 426 427 physmem = (physical_end - physical_start) / PAGE_SIZE; 428 429 /* Tell the user about the memory */ 430 #ifdef VERBOSE_INIT_ARM 431 printf("physmemory: %"PRIuPSIZE" pages at 0x%08lx -> 0x%08lx\n", physmem, 432 physical_start, physical_end - 1); 433 434 printf("Allocating page tables\n"); 435 #endif 436 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 437 438 freemempos = 0x10000000; 439 440 #ifdef VERBOSE_INIT_ARM 441 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 442 physical_start, physical_end); 443 #endif 444 445 /* Define a macro to simplify memory allocation */ 446 #define valloc_pages(var, np) \ 447 alloc_pages((var).pv_pa, (np)); \ 448 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 449 450 #if 0 451 #define alloc_pages(var, np) \ 452 physical_freeend -= ((np) * PAGE_SIZE); \ 453 if (physical_freeend < physical_freestart) \ 454 panic("initarm: out of memory"); \ 455 (var) = physical_freeend; \ 456 free_pages -= (np); \ 457 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 458 #else 459 #define alloc_pages(var, np) \ 460 (var) = freemempos; \ 461 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 462 freemempos += (np) * PAGE_SIZE; 463 #endif 464 465 loop1 = 0; 466 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 467 /* Are we 16KB aligned for an L1 ? */ 468 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 469 && kernel_l1pt.pv_pa == 0) { 470 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 471 } else { 472 valloc_pages(kernel_pt_table[loop1], 473 L2_TABLE_SIZE / PAGE_SIZE); 474 ++loop1; 475 } 476 } 477 478 /* This should never be able to happen but better confirm that. */ 479 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 480 panic("initarm: Failed to align the kernel page directory"); 481 482 /* 483 * Allocate a page for the system page. 484 * This page will just contain the system vectors and can be 485 * shared by all processes. 486 */ 487 alloc_pages(systempage.pv_pa, 1); 488 489 /* Allocate stacks for all modes */ 490 valloc_pages(irqstack, IRQ_STACK_SIZE); 491 valloc_pages(abtstack, ABT_STACK_SIZE); 492 valloc_pages(undstack, UND_STACK_SIZE); 493 valloc_pages(kernelstack, UPAGES); 494 495 /* Allocate enough pages for cleaning the Mini-Data cache. */ 496 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 497 valloc_pages(minidataclean, 1); 498 499 #ifdef VERBOSE_INIT_ARM 500 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 501 irqstack.pv_va); 502 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 503 abtstack.pv_va); 504 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 505 undstack.pv_va); 506 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 507 kernelstack.pv_va); 508 #endif 509 510 /* 511 * XXX Defer this to later so that we can reclaim the memory 512 * XXX used by the RedBoot page tables. 513 */ 514 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 515 516 /* 517 * Ok we have allocated physical pages for the primary kernel 518 * page tables 519 */ 520 521 #ifdef VERBOSE_INIT_ARM 522 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 523 #endif 524 525 /* 526 * Now we start construction of the L1 page table 527 * We start by mapping the L2 page tables into the L1. 528 * This means that we can replace L1 mappings later on if necessary 529 */ 530 l1pagetable = kernel_l1pt.pv_pa; 531 532 /* Map the L2 pages tables in the L1 page table */ 533 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 534 &kernel_pt_table[KERNEL_PT_SYS]); 535 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 536 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 537 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 538 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 539 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 540 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 541 542 /* update the top of the kernel VM */ 543 pmap_curmaxkvaddr = 544 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 545 546 pmap_link_l2pt(l1pagetable, IXP425_IO_VBASE, 547 &kernel_pt_table[KERNEL_PT_IO]); 548 549 #ifdef VERBOSE_INIT_ARM 550 printf("Mapping kernel\n"); 551 #endif 552 553 /* Now we fill in the L2 pagetable for the kernel static code/data */ 554 { 555 extern char etext[], _end[]; 556 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 557 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 558 u_int logical; 559 560 textsize = (textsize + PGOFSET) & ~PGOFSET; 561 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 562 563 logical = 0x00200000; /* offset of kernel in RAM */ 564 565 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 566 physical_start + logical, textsize, 567 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 568 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 569 physical_start + logical, totalsize - textsize, 570 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 571 } 572 573 #ifdef VERBOSE_INIT_ARM 574 printf("Constructing L2 page tables\n"); 575 #endif 576 577 /* Map the stack pages */ 578 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 579 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 580 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 581 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 582 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 583 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 584 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 585 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 586 587 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 588 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 589 590 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 591 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 592 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 593 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 594 } 595 596 /* Map the Mini-Data cache clean area. */ 597 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 598 minidataclean.pv_pa); 599 600 /* Map the vector page. */ 601 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 602 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 603 604 /* 605 * Map the IXP425 registers 606 */ 607 pmap_devmap_bootstrap(l1pagetable, ixp425_devmap); 608 609 /* 610 * Give the XScale global cache clean code an appropriately 611 * sized chunk of unmapped VA space starting at 0xff000000 612 * (our device mappings end before this address). 613 */ 614 xscale_cache_clean_addr = 0xff000000U; 615 616 /* 617 * Now we have the real page tables in place so we can switch to them. 618 * Once this is done we will be running with the REAL kernel page 619 * tables. 620 */ 621 622 /* 623 * Update the physical_freestart/physical_freeend/free_pages 624 * variables. 625 */ 626 { 627 extern char _end[]; 628 629 physical_freestart = physical_start + 630 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 631 KERNEL_BASE); 632 physical_freeend = physical_end; 633 free_pages = 634 (physical_freeend - physical_freestart) / PAGE_SIZE; 635 } 636 637 /* Switch tables */ 638 #ifdef VERBOSE_INIT_ARM 639 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 640 physical_freestart, free_pages, free_pages); 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 * Moved 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("bootstrap done.\n"); 656 #endif 657 658 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 659 660 /* 661 * Pages were allocated during the secondary bootstrap for the 662 * stacks for different CPU modes. 663 * We must now set the r13 registers in the different CPU modes to 664 * point to these stacks. 665 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 666 * of the stack memory. 667 */ 668 #ifdef VERBOSE_INIT_ARM 669 printf("init subsystems: stacks "); 670 #endif 671 672 set_stackptr(PSR_IRQ32_MODE, 673 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 674 set_stackptr(PSR_ABT32_MODE, 675 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 676 set_stackptr(PSR_UND32_MODE, 677 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 678 679 /* 680 * Well we should set a data abort handler. 681 * Once things get going this will change as we will need a proper 682 * handler. 683 * Until then we will use a handler that just panics but tells us 684 * why. 685 * Initialisation of the vectors will just panic on a data abort. 686 * This just fills in a slightly better one. 687 */ 688 #ifdef VERBOSE_INIT_ARM 689 printf("vectors "); 690 #endif 691 data_abort_handler_address = (u_int)data_abort_handler; 692 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 693 undefined_handler_address = (u_int)undefinedinstruction_bounce; 694 695 /* Initialise the undefined instruction handlers */ 696 #ifdef VERBOSE_INIT_ARM 697 printf("undefined "); 698 #endif 699 undefined_init(); 700 701 /* Load memory into UVM. */ 702 #ifdef VERBOSE_INIT_ARM 703 printf("page "); 704 #endif 705 uvm_md_init(); 706 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 707 atop(physical_freestart), atop(physical_freeend), 708 VM_FREELIST_DEFAULT); 709 710 /* Boot strap pmap telling it where managed kernel virtual memory is */ 711 #ifdef VERBOSE_INIT_ARM 712 printf("pmap "); 713 #endif 714 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 715 716 /* Setup the IRQ system */ 717 #ifdef VERBOSE_INIT_ARM 718 printf("irq "); 719 #endif 720 ixp425_intr_init(); 721 #ifdef VERBOSE_INIT_ARM 722 printf("\nAll initialization done!\nNow Starting NetBSD, Here we go!\n"); 723 #endif 724 725 #ifdef BOOTHOWTO 726 boothowto = BOOTHOWTO; 727 #endif 728 729 #ifdef DDB 730 db_machine_init(); 731 if (boothowto & RB_KDB) 732 Debugger(); 733 #endif 734 735 /* We return the new stack pointer address */ 736 return kernelstack.pv_va + USPACE_SVC_STACK_TOP; 737 } 738 739 /* 740 * consinit 741 */ 742 void 743 consinit(void) 744 { 745 static int consinit_called; 746 static const bus_addr_t addrs[2] = { 747 IXP425_UART0_HWBASE, IXP425_UART1_HWBASE 748 }; 749 750 if (consinit_called != 0) 751 return; 752 753 consinit_called = 1; 754 755 pmap_devmap_register(ixp425_devmap); 756 757 if (comcnattach(&ixp425_a4x_bs_tag, addrs[comcnunit], 758 comcnspeed, IXP425_UART_FREQ, COM_TYPE_PXA2x0, comcnmode)) 759 panic("can't init serial console (UART%d)", comcnunit); 760 } 761
Indexes created Sun Oct 12 02:09:55 GMT 2025