nslu2_machdep.c revision 1.15
1 /* $NetBSD: nslu2_machdep.c,v 1.15 2009/11/27 03:23:07 rmind Exp $ */ 2 3 /*- 4 * Copyright (c) 2006 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Steve C. Woodford. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 /* 32 * Copyright (c) 2003 33 * Ichiro FUKUHARA <ichiro (at) ichiro.org>. 34 * All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 45 * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR 46 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 47 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 48 * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR 49 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 51 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 53 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 54 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 55 * SUCH DAMAGE. 56 */ 57 /* 58 * Copyright (c) 1997,1998 Mark Brinicombe. 59 * Copyright (c) 1997,1998 Causality Limited. 60 * All rights reserved. 61 * 62 * Redistribution and use in source and binary forms, with or without 63 * modification, are permitted provided that the following conditions 64 * are met: 65 * 1. Redistributions of source code must retain the above copyright 66 * notice, this list of conditions and the following disclaimer. 67 * 2. Redistributions in binary form must reproduce the above copyright 68 * notice, this list of conditions and the following disclaimer in the 69 * documentation and/or other materials provided with the distribution. 70 * 3. All advertising materials mentioning features or use of this software 71 * must display the following acknowledgement: 72 * This product includes software developed by Mark Brinicombe 73 * for the NetBSD Project. 74 * 4. The name of the company nor the name of the author may be used to 75 * endorse or promote products derived from this software without specific 76 * prior written permission. 77 * 78 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 79 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 80 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 81 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 82 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 83 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 84 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 85 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 86 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 87 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 88 * SUCH DAMAGE. 89 */ 90 91 /* 92 * Machine dependant functions for kernel setup for Linksys NSLU2 93 * using RedBoot firmware. 94 */ 95 96 #include <sys/cdefs.h> 97 __KERNEL_RCSID(0, "$NetBSD: nslu2_machdep.c,v 1.15 2009/11/27 03:23:07 rmind Exp $"); 98 99 #include "opt_ddb.h" 100 #include "opt_kgdb.h" 101 #include "opt_pmap_debug.h" 102 103 #include <sys/param.h> 104 #include <sys/device.h> 105 #include <sys/systm.h> 106 #include <sys/kernel.h> 107 #include <sys/exec.h> 108 #include <sys/proc.h> 109 #include <sys/msgbuf.h> 110 #include <sys/reboot.h> 111 #include <sys/termios.h> 112 #include <sys/ksyms.h> 113 114 #include <uvm/uvm_extern.h> 115 116 #include <dev/cons.h> 117 118 #include <machine/db_machdep.h> 119 #include <ddb/db_sym.h> 120 #include <ddb/db_extern.h> 121 122 #include <machine/bootconfig.h> 123 #include <machine/bus.h> 124 #include <machine/cpu.h> 125 #include <machine/frame.h> 126 #include <arm/undefined.h> 127 128 #include <arm/arm32/machdep.h> 129 130 #include <arm/xscale/ixp425reg.h> 131 #include <arm/xscale/ixp425var.h> 132 #include <arm/xscale/ixp425_sipvar.h> 133 134 #include <evbarm/nslu2/nslu2reg.h> 135 136 #include "com.h" 137 #if NCOM > 0 138 #include <dev/ic/comreg.h> 139 #include <dev/ic/comvar.h> 140 #endif 141 142 #include "ksyms.h" 143 144 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 145 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 146 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 147 148 /* 149 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 150 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 151 */ 152 #define KERNEL_VM_SIZE 0x0C000000 153 154 155 /* 156 * Address to call from cpu_reset() to reset the machine. 157 * This is machine architecture dependant as it varies depending 158 * on where the ROM appears when you turn the MMU off. 159 */ 160 161 u_int cpu_reset_address = 0x00000000; 162 163 /* Define various stack sizes in pages */ 164 #define IRQ_STACK_SIZE 1 165 #define ABT_STACK_SIZE 1 166 #define UND_STACK_SIZE 1 167 168 BootConfig bootconfig; /* Boot config storage */ 169 char *boot_args = NULL; 170 char *boot_file = NULL; 171 172 vm_offset_t physical_start; 173 vm_offset_t physical_freestart; 174 vm_offset_t physical_freeend; 175 vm_offset_t physical_end; 176 u_int free_pages; 177 vm_offset_t pagetables_start; 178 179 /* Physical and virtual addresses for some global pages */ 180 pv_addr_t irqstack; 181 pv_addr_t undstack; 182 pv_addr_t abtstack; 183 pv_addr_t kernelstack; 184 pv_addr_t minidataclean; 185 186 vm_offset_t msgbufphys; 187 188 extern u_int data_abort_handler_address; 189 extern u_int prefetch_abort_handler_address; 190 extern u_int undefined_handler_address; 191 extern int end; 192 193 #ifdef PMAP_DEBUG 194 extern int pmap_debug_level; 195 #endif 196 197 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 198 199 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 200 #define KERNEL_PT_KERNEL_NUM 4 201 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 202 /* L2 tables for mapping kernel VM */ 203 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1) 204 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 205 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 206 207 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 208 209 /* Prototypes */ 210 211 void consinit(void); 212 u_int cpu_get_control(void); 213 214 /* 215 * Define the default console speed for the board. This is generally 216 * what the firmware provided with the board defaults to. 217 */ 218 #ifndef CONSPEED 219 #define CONSPEED B115200 220 #endif /* ! CONSPEED */ 221 222 #ifndef CONUNIT 223 #define CONUNIT 0 224 #endif 225 226 #ifndef CONMODE 227 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */ 228 #endif 229 230 int comcnspeed = CONSPEED; 231 int comcnmode = CONMODE; 232 int comcnunit = CONUNIT; 233 234 #if KGDB 235 #ifndef KGDB_DEVNAME 236 #error Must define KGDB_DEVNAME 237 #endif 238 const char kgdb_devname[] = KGDB_DEVNAME; 239 240 #ifndef KGDB_DEVADDR 241 #error Must define KGDB_DEVADDR 242 #endif 243 unsigned long kgdb_devaddr = KGDB_DEVADDR; 244 245 #ifndef KGDB_DEVRATE 246 #define KGDB_DEVRATE CONSPEED 247 #endif 248 int kgdb_devrate = KGDB_DEVRATE; 249 250 #ifndef KGDB_DEVMODE 251 #define KGDB_DEVMODE CONMODE 252 #endif 253 int kgdb_devmode = KGDB_DEVMODE; 254 #endif /* KGDB */ 255 256 /* 257 * void cpu_reboot(int howto, char *bootstr) 258 * 259 * Reboots the system 260 * 261 * Deal with any syncing, unmounting, dumping and shutdown hooks, 262 * then reset the CPU. 263 */ 264 void 265 cpu_reboot(int howto, char *bootstr) 266 { 267 268 #ifdef DIAGNOSTIC 269 /* info */ 270 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 271 #endif 272 273 /* 274 * If we are still cold then hit the air brakes 275 * and crash to earth fast 276 */ 277 if (cold) { 278 doshutdownhooks(); 279 pmf_system_shutdown(boothowto); 280 printf("The operating system has halted.\n"); 281 printf("Please press any key to reboot.\n\n"); 282 cngetc(); 283 goto reset; 284 } 285 286 /* Disable console buffering */ 287 288 /* 289 * If RB_NOSYNC was not specified sync the discs. 290 * Note: Unless cold is set to 1 here, syslogd will die during the 291 * unmount. It looks like syslogd is getting woken up only to find 292 * that it cannot page part of the binary in as the filesystem has 293 * been unmounted. 294 */ 295 if (!(howto & RB_NOSYNC)) 296 bootsync(); 297 298 /* Say NO to interrupts */ 299 splhigh(); 300 301 /* Do a dump if requested. */ 302 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 303 dumpsys(); 304 305 /* Run any shutdown hooks */ 306 doshutdownhooks(); 307 308 pmf_system_shutdown(boothowto); 309 310 /* Make sure IRQ's are disabled */ 311 IRQdisable; 312 313 if ((howto & (RB_HALT | RB_POWERDOWN)) == RB_HALT) { 314 printf("The operating system has halted.\n"); 315 printf("Please press any key to reboot.\n\n"); 316 cngetc(); 317 } 318 319 reset: 320 /* 321 * Make really really sure that all interrupts are disabled, 322 */ 323 (void) disable_interrupts(I32_bit | F32_bit); 324 325 if (howto & RB_POWERDOWN) { 326 uint32_t reg; 327 328 printf("powering down...\n\r"); 329 /* Delay to allow the UART's Tx FIFO to drain */ 330 delay(50000); 331 332 #define GPRD(r) *((volatile uint32_t *)(IXP425_GPIO_VBASE+(r))) 333 #define GPWR(r,v) *((volatile uint32_t *)(IXP425_GPIO_VBASE+(r))) = (v) 334 335 /* 336 * Power-down pin requires a short pulse 337 */ 338 reg = GPRD(IXP425_GPIO_GPOUTR); 339 reg |= 1u << GPIO_POWER_OFF; 340 GPWR(IXP425_GPIO_GPOUTR, reg); 341 342 delay(1000); 343 344 reg = GPRD(IXP425_GPIO_GPOUTR); 345 reg &= ~(1u << GPIO_POWER_OFF); 346 GPWR(IXP425_GPIO_GPOUTR, reg); 347 348 delay(500000); 349 printf("POWER OFF FAILED! TRYING TO REBOOT INSTEAD\n\r"); 350 } 351 352 printf("rebooting...\n\r"); 353 354 #define WDWR(r,v) *((volatile uint32_t *)(IXP425_OST_WDOG_VBASE+(r))) = (v) 355 /* Force a watchdog reset */ 356 WDWR(IXP425_OST_WDOG_KEY, OST_WDOG_KEY_MAJICK); 357 WDWR(IXP425_OST_WDOG_ENAB, OST_WDOG_ENAB_RST_ENA); 358 WDWR(IXP425_OST_WDOG, 0x1000); 359 WDWR(IXP425_OST_WDOG_ENAB, 360 OST_WDOG_ENAB_RST_ENA | OST_WDOG_ENAB_CNT_ENA); 361 362 delay(500000); 363 364 /* ...and if that didn't work, just croak. */ 365 printf("RESET FAILED!\n"); 366 367 for (;;); 368 } 369 370 /* Static device mappings. */ 371 static const struct pmap_devmap nslu2_devmap[] = { 372 /* Physical/Virtual address for I/O space */ 373 { 374 IXP425_IO_VBASE, 375 IXP425_IO_HWBASE, 376 IXP425_IO_SIZE, 377 VM_PROT_READ|VM_PROT_WRITE, 378 PTE_NOCACHE, 379 }, 380 381 /* Expansion Bus */ 382 { 383 IXP425_EXP_VBASE, 384 IXP425_EXP_HWBASE, 385 IXP425_EXP_SIZE, 386 VM_PROT_READ|VM_PROT_WRITE, 387 PTE_NOCACHE, 388 }, 389 390 /* IXP425 PCI Configuration */ 391 { 392 IXP425_PCI_VBASE, 393 IXP425_PCI_HWBASE, 394 IXP425_PCI_SIZE, 395 VM_PROT_READ|VM_PROT_WRITE, 396 PTE_NOCACHE, 397 }, 398 399 /* SDRAM Controller */ 400 { 401 IXP425_MCU_VBASE, 402 IXP425_MCU_HWBASE, 403 IXP425_MCU_SIZE, 404 VM_PROT_READ|VM_PROT_WRITE, 405 PTE_NOCACHE, 406 }, 407 408 /* PCI Memory Space */ 409 { 410 IXP425_PCI_MEM_VBASE, 411 IXP425_PCI_MEM_HWBASE, 412 IXP425_PCI_MEM_SIZE, 413 VM_PROT_READ|VM_PROT_WRITE, 414 PTE_NOCACHE, 415 }, 416 417 /* Flash memory */ 418 { 419 NSLU2_FLASH_VBASE, 420 NSLU2_FLASH_HWBASE, 421 NSLU2_FLASH_SIZE, 422 VM_PROT_READ|VM_PROT_WRITE, 423 PTE_NOCACHE, 424 }, 425 426 { 427 0, 428 0, 429 0, 430 0, 431 0, 432 } 433 }; 434 435 /* 436 * u_int initarm(...) 437 * 438 * Initial entry point on startup. This gets called before main() is 439 * entered. 440 * It should be responsible for setting up everything that must be 441 * in place when main is called. 442 * This includes 443 * Taking a copy of the boot configuration structure. 444 * Initialising the physical console so characters can be printed. 445 * Setting up page tables for the kernel 446 * Relocating the kernel to the bottom of physical memory 447 */ 448 u_int 449 initarm(void *arg) 450 { 451 extern vaddr_t xscale_cache_clean_addr; 452 #ifdef DIAGNOSTIC 453 extern vsize_t xscale_minidata_clean_size; 454 #endif 455 int loop; 456 int loop1; 457 u_int kerneldatasize; 458 u_int l1pagetable; 459 u_int freemempos; 460 uint32_t reg; 461 462 /* 463 * Make sure the power-down GPIO pin is configured correctly, as 464 * cpu_reboot() may be called early on (e.g. from within ddb(9)). 465 */ 466 /* Pin is active-high, so make sure it's driven low */ 467 reg = GPRD(IXP425_GPIO_GPOUTR); 468 reg &= ~(1u << GPIO_POWER_OFF); 469 GPWR(IXP425_GPIO_GPOUTR, reg); 470 471 /* Set as output */ 472 reg = GPRD(IXP425_GPIO_GPOER); 473 reg &= ~(1u << GPIO_POWER_OFF); 474 GPWR(IXP425_GPIO_GPOER, reg); 475 476 /* 477 * Since we map v0xf0000000 == p0xc8000000, it's possible for 478 * us to initialize the console now. 479 */ 480 consinit(); 481 482 #ifdef VERBOSE_INIT_ARM 483 /* Talk to the user */ 484 printf("\nNetBSD/evbarm (Linksys NSLU2) booting ...\n"); 485 #endif 486 487 /* 488 * Heads up ... Setup the CPU / MMU / TLB functions 489 */ 490 if (set_cpufuncs()) 491 panic("cpu not recognized!"); 492 493 /* XXX overwrite bootconfig to hardcoded values */ 494 bootconfig.dramblocks = 1; 495 bootconfig.dram[0].address = 0x10000000; 496 bootconfig.dram[0].pages = ixp425_sdram_size() / PAGE_SIZE; 497 498 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 499 500 #ifdef VERBOSE_INIT_ARM 501 printf("kernsize=0x%x\n", kerneldatasize); 502 #endif 503 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 504 505 /* 506 * Set up the variables that define the availablilty of 507 * physical memory. For now, we're going to set 508 * physical_freestart to 0x10200000 (where the kernel 509 * was loaded), and allocate the memory we need downwards. 510 * If we get too close to the L1 table that we set up, we 511 * will panic. We will update physical_freestart and 512 * physical_freeend later to reflect what pmap_bootstrap() 513 * wants to see. 514 * 515 * XXX pmap_bootstrap() needs an enema. 516 */ 517 physical_start = bootconfig.dram[0].address; 518 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 519 520 physical_freestart = physical_start 521 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 522 physical_freeend = physical_end; 523 524 physmem = (physical_end - physical_start) / PAGE_SIZE; 525 526 /* Tell the user about the memory */ 527 #ifdef VERBOSE_INIT_ARM 528 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 529 physical_start, physical_end - 1); 530 531 printf("Allocating page tables\n"); 532 #endif 533 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 534 535 freemempos = 0x10000000; 536 537 #ifdef VERBOSE_INIT_ARM 538 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 539 physical_start, physical_end); 540 #endif 541 542 /* Define a macro to simplify memory allocation */ 543 #define valloc_pages(var, np) \ 544 alloc_pages((var).pv_pa, (np)); \ 545 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 546 547 #if 0 548 #define alloc_pages(var, np) \ 549 physical_freeend -= ((np) * PAGE_SIZE); \ 550 if (physical_freeend < physical_freestart) \ 551 panic("initarm: out of memory"); \ 552 (var) = physical_freeend; \ 553 free_pages -= (np); \ 554 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 555 #else 556 #define alloc_pages(var, np) \ 557 (var) = freemempos; \ 558 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 559 freemempos += (np) * PAGE_SIZE; 560 #endif 561 562 loop1 = 0; 563 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 564 /* Are we 16KB aligned for an L1 ? */ 565 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 566 && kernel_l1pt.pv_pa == 0) { 567 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 568 } else { 569 valloc_pages(kernel_pt_table[loop1], 570 L2_TABLE_SIZE / PAGE_SIZE); 571 ++loop1; 572 } 573 } 574 575 /* This should never be able to happen but better confirm that. */ 576 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 577 panic("initarm: Failed to align the kernel page directory"); 578 579 /* 580 * Allocate a page for the system page. 581 * This page will just contain the system vectors and can be 582 * shared by all processes. 583 */ 584 alloc_pages(systempage.pv_pa, 1); 585 586 /* Allocate stacks for all modes */ 587 valloc_pages(irqstack, IRQ_STACK_SIZE); 588 valloc_pages(abtstack, ABT_STACK_SIZE); 589 valloc_pages(undstack, UND_STACK_SIZE); 590 valloc_pages(kernelstack, UPAGES); 591 592 /* Allocate enough pages for cleaning the Mini-Data cache. */ 593 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 594 valloc_pages(minidataclean, 1); 595 596 #ifdef VERBOSE_INIT_ARM 597 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 598 irqstack.pv_va); 599 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 600 abtstack.pv_va); 601 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 602 undstack.pv_va); 603 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 604 kernelstack.pv_va); 605 #endif 606 607 /* 608 * XXX Defer this to later so that we can reclaim the memory 609 * XXX used by the RedBoot page tables. 610 */ 611 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 612 613 /* 614 * Ok we have allocated physical pages for the primary kernel 615 * page tables 616 */ 617 618 #ifdef VERBOSE_INIT_ARM 619 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 620 #endif 621 622 /* 623 * Now we start construction of the L1 page table 624 * We start by mapping the L2 page tables into the L1. 625 * This means that we can replace L1 mappings later on if necessary 626 */ 627 l1pagetable = kernel_l1pt.pv_pa; 628 629 /* Map the L2 pages tables in the L1 page table */ 630 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 631 &kernel_pt_table[KERNEL_PT_SYS]); 632 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 633 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 634 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 635 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 636 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 637 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 638 639 /* update the top of the kernel VM */ 640 pmap_curmaxkvaddr = 641 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 642 643 pmap_link_l2pt(l1pagetable, IXP425_IO_VBASE, 644 &kernel_pt_table[KERNEL_PT_IO]); 645 646 #ifdef VERBOSE_INIT_ARM 647 printf("Mapping kernel\n"); 648 #endif 649 650 /* Now we fill in the L2 pagetable for the kernel static code/data */ 651 { 652 extern char etext[], _end[]; 653 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 654 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 655 u_int logical; 656 657 textsize = (textsize + PGOFSET) & ~PGOFSET; 658 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 659 660 logical = 0x00200000; /* offset of kernel in RAM */ 661 662 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 663 physical_start + logical, textsize, 664 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 665 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 666 physical_start + logical, totalsize - textsize, 667 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 668 } 669 670 #ifdef VERBOSE_INIT_ARM 671 printf("Constructing L2 page tables\n"); 672 #endif 673 674 /* Map the stack pages */ 675 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 676 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 677 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 678 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 679 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 680 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 681 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 682 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 683 684 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 685 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 686 687 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 688 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 689 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 690 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 691 } 692 693 /* Map the Mini-Data cache clean area. */ 694 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 695 minidataclean.pv_pa); 696 697 /* Map the vector page. */ 698 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 699 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 700 701 /* 702 * Map the IXP425 registers 703 */ 704 pmap_devmap_bootstrap(l1pagetable, nslu2_devmap); 705 706 /* 707 * Give the XScale global cache clean code an appropriately 708 * sized chunk of unmapped VA space starting at 0xff000000 709 * (our device mappings end before this address). 710 */ 711 xscale_cache_clean_addr = 0xff000000U; 712 713 /* 714 * Now we have the real page tables in place so we can switch to them. 715 * Once this is done we will be running with the REAL kernel page 716 * tables. 717 */ 718 719 /* 720 * Update the physical_freestart/physical_freeend/free_pages 721 * variables. 722 */ 723 { 724 extern char _end[]; 725 726 physical_freestart = physical_start + 727 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 728 KERNEL_BASE); 729 physical_freeend = physical_end; 730 free_pages = 731 (physical_freeend - physical_freestart) / PAGE_SIZE; 732 } 733 734 /* Switch tables */ 735 #ifdef VERBOSE_INIT_ARM 736 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 737 physical_freestart, free_pages, free_pages); 738 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 739 #endif 740 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 741 setttb(kernel_l1pt.pv_pa); 742 cpu_tlb_flushID(); 743 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 744 745 /* 746 * Moved from cpu_startup() as data_abort_handler() references 747 * this during uvm init 748 */ 749 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 750 751 #ifdef VERBOSE_INIT_ARM 752 printf("bootstrap done.\n"); 753 #endif 754 755 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 756 757 /* 758 * Pages were allocated during the secondary bootstrap for the 759 * stacks for different CPU modes. 760 * We must now set the r13 registers in the different CPU modes to 761 * point to these stacks. 762 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 763 * of the stack memory. 764 */ 765 #ifdef VERBOSE_INIT_ARM 766 printf("init subsystems: stacks "); 767 #endif 768 769 set_stackptr(PSR_IRQ32_MODE, 770 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 771 set_stackptr(PSR_ABT32_MODE, 772 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 773 set_stackptr(PSR_UND32_MODE, 774 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 775 776 /* 777 * Well we should set a data abort handler. 778 * Once things get going this will change as we will need a proper 779 * handler. 780 * Until then we will use a handler that just panics but tells us 781 * why. 782 * Initialisation of the vectors will just panic on a data abort. 783 * This just fills in a slightly better one. 784 */ 785 #ifdef VERBOSE_INIT_ARM 786 printf("vectors "); 787 #endif 788 data_abort_handler_address = (u_int)data_abort_handler; 789 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 790 undefined_handler_address = (u_int)undefinedinstruction_bounce; 791 792 /* Initialise the undefined instruction handlers */ 793 #ifdef VERBOSE_INIT_ARM 794 printf("undefined "); 795 #endif 796 undefined_init(); 797 798 /* Load memory into UVM. */ 799 #ifdef VERBOSE_INIT_ARM 800 printf("page "); 801 #endif 802 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 803 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 804 atop(physical_freestart), atop(physical_freeend), 805 VM_FREELIST_DEFAULT); 806 807 /* Boot strap pmap telling it where the kernel page table is */ 808 #ifdef VERBOSE_INIT_ARM 809 printf("pmap "); 810 #endif 811 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 812 813 /* Setup the IRQ system */ 814 #ifdef VERBOSE_INIT_ARM 815 printf("irq "); 816 #endif 817 ixp425_intr_init(); 818 #ifdef VERBOSE_INIT_ARM 819 printf("\nAll initialize done!\nNow Starting NetBSD, Hear we go!\n"); 820 #endif 821 822 #ifdef BOOTHOWTO 823 boothowto = BOOTHOWTO; 824 #endif 825 826 #ifdef DDB 827 db_machine_init(); 828 if (boothowto & RB_KDB) 829 Debugger(); 830 #endif 831 832 /* We return the new stack pointer address */ 833 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 834 } 835 836 /* 837 * consinit 838 */ 839 void 840 consinit(void) 841 { 842 static int consinit_called; 843 static const bus_addr_t addrs[2] = { 844 IXP425_UART0_HWBASE, IXP425_UART1_HWBASE 845 }; 846 847 if (consinit_called != 0) 848 return; 849 850 consinit_called = 1; 851 852 pmap_devmap_register(nslu2_devmap); 853 854 if (comcnattach(&ixp425_a4x_bs_tag, addrs[comcnunit], 855 comcnspeed, IXP425_UART_FREQ, COM_TYPE_PXA2x0, comcnmode)) 856 panic("can't init serial console (UART%d)", comcnunit); 857 } 858
Indexes created Thu Oct 02 10:09:58 GMT 2025