nslu2_machdep.c revision 1.18
1 /* $NetBSD: nslu2_machdep.c,v 1.18 2011/06/30 20:09:28 wiz 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 dependent 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 1.18 2011/06/30 20:09:28 wiz 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 dependent 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; 177 178 /* Physical and virtual addresses for some global pages */ 179 pv_addr_t irqstack; 180 pv_addr_t undstack; 181 pv_addr_t abtstack; 182 pv_addr_t kernelstack; 183 pv_addr_t minidataclean; 184 185 vm_offset_t msgbufphys; 186 187 extern u_int data_abort_handler_address; 188 extern u_int prefetch_abort_handler_address; 189 extern u_int undefined_handler_address; 190 extern int end; 191 192 #ifdef PMAP_DEBUG 193 extern int pmap_debug_level; 194 #endif 195 196 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 197 198 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 199 #define KERNEL_PT_KERNEL_NUM 4 200 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 201 /* L2 tables for mapping kernel VM */ 202 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1) 203 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 204 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 205 206 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 207 208 /* Prototypes */ 209 210 void consinit(void); 211 u_int cpu_get_control(void); 212 213 /* 214 * Define the default console speed for the board. This is generally 215 * what the firmware provided with the board defaults to. 216 */ 217 #ifndef CONSPEED 218 #define CONSPEED B115200 219 #endif /* ! CONSPEED */ 220 221 #ifndef CONUNIT 222 #define CONUNIT 0 223 #endif 224 225 #ifndef CONMODE 226 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */ 227 #endif 228 229 int comcnspeed = CONSPEED; 230 int comcnmode = CONMODE; 231 int comcnunit = CONUNIT; 232 233 #if KGDB 234 #ifndef KGDB_DEVNAME 235 #error Must define KGDB_DEVNAME 236 #endif 237 const char kgdb_devname[] = KGDB_DEVNAME; 238 239 #ifndef KGDB_DEVADDR 240 #error Must define KGDB_DEVADDR 241 #endif 242 unsigned long kgdb_devaddr = KGDB_DEVADDR; 243 244 #ifndef KGDB_DEVRATE 245 #define KGDB_DEVRATE CONSPEED 246 #endif 247 int kgdb_devrate = KGDB_DEVRATE; 248 249 #ifndef KGDB_DEVMODE 250 #define KGDB_DEVMODE CONMODE 251 #endif 252 int kgdb_devmode = KGDB_DEVMODE; 253 #endif /* KGDB */ 254 255 /* 256 * void cpu_reboot(int howto, char *bootstr) 257 * 258 * Reboots the system 259 * 260 * Deal with any syncing, unmounting, dumping and shutdown hooks, 261 * then reset the CPU. 262 */ 263 void 264 cpu_reboot(int howto, char *bootstr) 265 { 266 267 #ifdef DIAGNOSTIC 268 /* info */ 269 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 270 #endif 271 272 /* 273 * If we are still cold then hit the air brakes 274 * and crash to earth fast 275 */ 276 if (cold) { 277 doshutdownhooks(); 278 pmf_system_shutdown(boothowto); 279 printf("The operating system has halted.\n"); 280 printf("Please press any key to reboot.\n\n"); 281 cngetc(); 282 goto reset; 283 } 284 285 /* Disable console buffering */ 286 287 /* 288 * If RB_NOSYNC was not specified sync the discs. 289 * Note: Unless cold is set to 1 here, syslogd will die during the 290 * unmount. It looks like syslogd is getting woken up only to find 291 * that it cannot page part of the binary in as the filesystem has 292 * been unmounted. 293 */ 294 if (!(howto & RB_NOSYNC)) 295 bootsync(); 296 297 /* Say NO to interrupts */ 298 splhigh(); 299 300 /* Do a dump if requested. */ 301 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 302 dumpsys(); 303 304 /* Run any shutdown hooks */ 305 doshutdownhooks(); 306 307 pmf_system_shutdown(boothowto); 308 309 /* Make sure IRQ's are disabled */ 310 IRQdisable; 311 312 if ((howto & (RB_HALT | RB_POWERDOWN)) == RB_HALT) { 313 printf("The operating system has halted.\n"); 314 printf("Please press any key to reboot.\n\n"); 315 cngetc(); 316 } 317 318 reset: 319 /* 320 * Make really really sure that all interrupts are disabled, 321 */ 322 (void) disable_interrupts(I32_bit | F32_bit); 323 324 if (howto & RB_POWERDOWN) { 325 uint32_t reg; 326 327 printf("powering down...\n\r"); 328 /* Delay to allow the UART's Tx FIFO to drain */ 329 delay(50000); 330 331 #define GPRD(r) *((volatile uint32_t *)(IXP425_GPIO_VBASE+(r))) 332 #define GPWR(r,v) *((volatile uint32_t *)(IXP425_GPIO_VBASE+(r))) = (v) 333 334 /* 335 * Power-down pin requires a short pulse 336 */ 337 reg = GPRD(IXP425_GPIO_GPOUTR); 338 reg |= 1u << GPIO_POWER_OFF; 339 GPWR(IXP425_GPIO_GPOUTR, reg); 340 341 delay(1000); 342 343 reg = GPRD(IXP425_GPIO_GPOUTR); 344 reg &= ~(1u << GPIO_POWER_OFF); 345 GPWR(IXP425_GPIO_GPOUTR, reg); 346 347 delay(500000); 348 printf("POWER OFF FAILED! TRYING TO REBOOT INSTEAD\n\r"); 349 } 350 351 printf("rebooting...\n\r"); 352 353 #define WDWR(r,v) *((volatile uint32_t *)(IXP425_OST_WDOG_VBASE+(r))) = (v) 354 /* Force a watchdog reset */ 355 WDWR(IXP425_OST_WDOG_KEY, OST_WDOG_KEY_MAJICK); 356 WDWR(IXP425_OST_WDOG_ENAB, OST_WDOG_ENAB_RST_ENA); 357 WDWR(IXP425_OST_WDOG, 0x1000); 358 WDWR(IXP425_OST_WDOG_ENAB, 359 OST_WDOG_ENAB_RST_ENA | OST_WDOG_ENAB_CNT_ENA); 360 361 delay(500000); 362 363 /* ...and if that didn't work, just croak. */ 364 printf("RESET FAILED!\n"); 365 366 for (;;); 367 } 368 369 /* Static device mappings. */ 370 static const struct pmap_devmap nslu2_devmap[] = { 371 /* Physical/Virtual address for I/O space */ 372 { 373 IXP425_IO_VBASE, 374 IXP425_IO_HWBASE, 375 IXP425_IO_SIZE, 376 VM_PROT_READ|VM_PROT_WRITE, 377 PTE_NOCACHE, 378 }, 379 380 /* Expansion Bus */ 381 { 382 IXP425_EXP_VBASE, 383 IXP425_EXP_HWBASE, 384 IXP425_EXP_SIZE, 385 VM_PROT_READ|VM_PROT_WRITE, 386 PTE_NOCACHE, 387 }, 388 389 /* IXP425 PCI Configuration */ 390 { 391 IXP425_PCI_VBASE, 392 IXP425_PCI_HWBASE, 393 IXP425_PCI_SIZE, 394 VM_PROT_READ|VM_PROT_WRITE, 395 PTE_NOCACHE, 396 }, 397 398 /* SDRAM Controller */ 399 { 400 IXP425_MCU_VBASE, 401 IXP425_MCU_HWBASE, 402 IXP425_MCU_SIZE, 403 VM_PROT_READ|VM_PROT_WRITE, 404 PTE_NOCACHE, 405 }, 406 407 /* PCI Memory Space */ 408 { 409 IXP425_PCI_MEM_VBASE, 410 IXP425_PCI_MEM_HWBASE, 411 IXP425_PCI_MEM_SIZE, 412 VM_PROT_READ|VM_PROT_WRITE, 413 PTE_NOCACHE, 414 }, 415 416 /* Flash memory */ 417 { 418 NSLU2_FLASH_VBASE, 419 NSLU2_FLASH_HWBASE, 420 NSLU2_FLASH_SIZE, 421 VM_PROT_READ|VM_PROT_WRITE, 422 PTE_NOCACHE, 423 }, 424 425 { 426 0, 427 0, 428 0, 429 0, 430 0, 431 } 432 }; 433 434 /* 435 * u_int initarm(...) 436 * 437 * Initial entry point on startup. This gets called before main() is 438 * entered. 439 * It should be responsible for setting up everything that must be 440 * in place when main is called. 441 * This includes 442 * Taking a copy of the boot configuration structure. 443 * Initialising the physical console so characters can be printed. 444 * Setting up page tables for the kernel 445 * Relocating the kernel to the bottom of physical memory 446 */ 447 u_int 448 initarm(void *arg) 449 { 450 extern vaddr_t xscale_cache_clean_addr; 451 #ifdef DIAGNOSTIC 452 extern vsize_t xscale_minidata_clean_size; 453 #endif 454 int loop; 455 int loop1; 456 u_int kerneldatasize; 457 u_int l1pagetable; 458 u_int freemempos; 459 uint32_t reg; 460 461 /* 462 * Make sure the power-down GPIO pin is configured correctly, as 463 * cpu_reboot() may be called early on (e.g. from within ddb(9)). 464 */ 465 /* Pin is active-high, so make sure it's driven low */ 466 reg = GPRD(IXP425_GPIO_GPOUTR); 467 reg &= ~(1u << GPIO_POWER_OFF); 468 GPWR(IXP425_GPIO_GPOUTR, reg); 469 470 /* Set as output */ 471 reg = GPRD(IXP425_GPIO_GPOER); 472 reg &= ~(1u << GPIO_POWER_OFF); 473 GPWR(IXP425_GPIO_GPOER, reg); 474 475 /* 476 * Since we map v0xf0000000 == p0xc8000000, it's possible for 477 * us to initialize the console now. 478 */ 479 consinit(); 480 481 #ifdef VERBOSE_INIT_ARM 482 /* Talk to the user */ 483 printf("\nNetBSD/evbarm (Linksys NSLU2) booting ...\n"); 484 #endif 485 486 /* 487 * Heads up ... Setup the CPU / MMU / TLB functions 488 */ 489 if (set_cpufuncs()) 490 panic("cpu not recognized!"); 491 492 /* XXX overwrite bootconfig to hardcoded values */ 493 bootconfig.dramblocks = 1; 494 bootconfig.dram[0].address = 0x10000000; 495 bootconfig.dram[0].pages = ixp425_sdram_size() / PAGE_SIZE; 496 497 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 498 499 #ifdef VERBOSE_INIT_ARM 500 printf("kernsize=0x%x\n", kerneldatasize); 501 #endif 502 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 503 504 /* 505 * Set up the variables that define the availablilty of 506 * physical memory. For now, we're going to set 507 * physical_freestart to 0x10200000 (where the kernel 508 * was loaded), and allocate the memory we need downwards. 509 * If we get too close to the L1 table that we set up, we 510 * will panic. We will update physical_freestart and 511 * physical_freeend later to reflect what pmap_bootstrap() 512 * wants to see. 513 * 514 * XXX pmap_bootstrap() needs an enema. 515 */ 516 physical_start = bootconfig.dram[0].address; 517 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 518 519 physical_freestart = physical_start 520 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 521 physical_freeend = physical_end; 522 523 physmem = (physical_end - physical_start) / PAGE_SIZE; 524 525 /* Tell the user about the memory */ 526 #ifdef VERBOSE_INIT_ARM 527 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 528 physical_start, physical_end - 1); 529 530 printf("Allocating page tables\n"); 531 #endif 532 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 533 534 freemempos = 0x10000000; 535 536 #ifdef VERBOSE_INIT_ARM 537 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 538 physical_start, physical_end); 539 #endif 540 541 /* Define a macro to simplify memory allocation */ 542 #define valloc_pages(var, np) \ 543 alloc_pages((var).pv_pa, (np)); \ 544 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 545 546 #if 0 547 #define alloc_pages(var, np) \ 548 physical_freeend -= ((np) * PAGE_SIZE); \ 549 if (physical_freeend < physical_freestart) \ 550 panic("initarm: out of memory"); \ 551 (var) = physical_freeend; \ 552 free_pages -= (np); \ 553 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 554 #else 555 #define alloc_pages(var, np) \ 556 (var) = freemempos; \ 557 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 558 freemempos += (np) * PAGE_SIZE; 559 #endif 560 561 loop1 = 0; 562 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 563 /* Are we 16KB aligned for an L1 ? */ 564 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 565 && kernel_l1pt.pv_pa == 0) { 566 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 567 } else { 568 valloc_pages(kernel_pt_table[loop1], 569 L2_TABLE_SIZE / PAGE_SIZE); 570 ++loop1; 571 } 572 } 573 574 /* This should never be able to happen but better confirm that. */ 575 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 576 panic("initarm: Failed to align the kernel page directory"); 577 578 /* 579 * Allocate a page for the system page. 580 * This page will just contain the system vectors and can be 581 * shared by all processes. 582 */ 583 alloc_pages(systempage.pv_pa, 1); 584 585 /* Allocate stacks for all modes */ 586 valloc_pages(irqstack, IRQ_STACK_SIZE); 587 valloc_pages(abtstack, ABT_STACK_SIZE); 588 valloc_pages(undstack, UND_STACK_SIZE); 589 valloc_pages(kernelstack, UPAGES); 590 591 /* Allocate enough pages for cleaning the Mini-Data cache. */ 592 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 593 valloc_pages(minidataclean, 1); 594 595 #ifdef VERBOSE_INIT_ARM 596 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 597 irqstack.pv_va); 598 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 599 abtstack.pv_va); 600 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 601 undstack.pv_va); 602 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 603 kernelstack.pv_va); 604 #endif 605 606 /* 607 * XXX Defer this to later so that we can reclaim the memory 608 * XXX used by the RedBoot page tables. 609 */ 610 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 611 612 /* 613 * Ok we have allocated physical pages for the primary kernel 614 * page tables 615 */ 616 617 #ifdef VERBOSE_INIT_ARM 618 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 619 #endif 620 621 /* 622 * Now we start construction of the L1 page table 623 * We start by mapping the L2 page tables into the L1. 624 * This means that we can replace L1 mappings later on if necessary 625 */ 626 l1pagetable = kernel_l1pt.pv_pa; 627 628 /* Map the L2 pages tables in the L1 page table */ 629 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 630 &kernel_pt_table[KERNEL_PT_SYS]); 631 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 632 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 633 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 634 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 635 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 636 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 637 638 /* update the top of the kernel VM */ 639 pmap_curmaxkvaddr = 640 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 641 642 pmap_link_l2pt(l1pagetable, IXP425_IO_VBASE, 643 &kernel_pt_table[KERNEL_PT_IO]); 644 645 #ifdef VERBOSE_INIT_ARM 646 printf("Mapping kernel\n"); 647 #endif 648 649 /* Now we fill in the L2 pagetable for the kernel static code/data */ 650 { 651 extern char etext[], _end[]; 652 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 653 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 654 u_int logical; 655 656 textsize = (textsize + PGOFSET) & ~PGOFSET; 657 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 658 659 logical = 0x00200000; /* offset of kernel in RAM */ 660 661 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 662 physical_start + logical, textsize, 663 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 664 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 665 physical_start + logical, totalsize - textsize, 666 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 667 } 668 669 #ifdef VERBOSE_INIT_ARM 670 printf("Constructing L2 page tables\n"); 671 #endif 672 673 /* Map the stack pages */ 674 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 675 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 676 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 677 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 678 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 679 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 680 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 681 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 682 683 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 684 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 685 686 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 687 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 688 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 689 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 690 } 691 692 /* Map the Mini-Data cache clean area. */ 693 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 694 minidataclean.pv_pa); 695 696 /* Map the vector page. */ 697 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 698 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 699 700 /* 701 * Map the IXP425 registers 702 */ 703 pmap_devmap_bootstrap(l1pagetable, nslu2_devmap); 704 705 /* 706 * Give the XScale global cache clean code an appropriately 707 * sized chunk of unmapped VA space starting at 0xff000000 708 * (our device mappings end before this address). 709 */ 710 xscale_cache_clean_addr = 0xff000000U; 711 712 /* 713 * Now we have the real page tables in place so we can switch to them. 714 * Once this is done we will be running with the REAL kernel page 715 * tables. 716 */ 717 718 /* 719 * Update the physical_freestart/physical_freeend/free_pages 720 * variables. 721 */ 722 { 723 extern char _end[]; 724 725 physical_freestart = physical_start + 726 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 727 KERNEL_BASE); 728 physical_freeend = physical_end; 729 free_pages = 730 (physical_freeend - physical_freestart) / PAGE_SIZE; 731 } 732 733 /* Switch tables */ 734 #ifdef VERBOSE_INIT_ARM 735 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 736 physical_freestart, free_pages, free_pages); 737 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 738 #endif 739 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 740 cpu_setttb(kernel_l1pt.pv_pa); 741 cpu_tlb_flushID(); 742 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 743 744 /* 745 * Moved from cpu_startup() as data_abort_handler() references 746 * this during uvm init 747 */ 748 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 749 750 #ifdef VERBOSE_INIT_ARM 751 printf("bootstrap done.\n"); 752 #endif 753 754 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 755 756 /* 757 * Pages were allocated during the secondary bootstrap for the 758 * stacks for different CPU modes. 759 * We must now set the r13 registers in the different CPU modes to 760 * point to these stacks. 761 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 762 * of the stack memory. 763 */ 764 #ifdef VERBOSE_INIT_ARM 765 printf("init subsystems: stacks "); 766 #endif 767 768 set_stackptr(PSR_IRQ32_MODE, 769 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 770 set_stackptr(PSR_ABT32_MODE, 771 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 772 set_stackptr(PSR_UND32_MODE, 773 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 774 775 /* 776 * Well we should set a data abort handler. 777 * Once things get going this will change as we will need a proper 778 * handler. 779 * Until then we will use a handler that just panics but tells us 780 * why. 781 * Initialisation of the vectors will just panic on a data abort. 782 * This just fills in a slightly better one. 783 */ 784 #ifdef VERBOSE_INIT_ARM 785 printf("vectors "); 786 #endif 787 data_abort_handler_address = (u_int)data_abort_handler; 788 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 789 undefined_handler_address = (u_int)undefinedinstruction_bounce; 790 791 /* Initialise the undefined instruction handlers */ 792 #ifdef VERBOSE_INIT_ARM 793 printf("undefined "); 794 #endif 795 undefined_init(); 796 797 /* Load memory into UVM. */ 798 #ifdef VERBOSE_INIT_ARM 799 printf("page "); 800 #endif 801 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 802 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 803 atop(physical_freestart), atop(physical_freeend), 804 VM_FREELIST_DEFAULT); 805 806 /* Boot strap pmap telling it where the kernel page table is */ 807 #ifdef VERBOSE_INIT_ARM 808 printf("pmap "); 809 #endif 810 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 811 812 /* Setup the IRQ system */ 813 #ifdef VERBOSE_INIT_ARM 814 printf("irq "); 815 #endif 816 ixp425_intr_init(); 817 #ifdef VERBOSE_INIT_ARM 818 printf("\nAll initialize done!\nNow Starting NetBSD, Hear we go!\n"); 819 #endif 820 821 #ifdef BOOTHOWTO 822 boothowto = BOOTHOWTO; 823 #endif 824 825 #ifdef DDB 826 db_machine_init(); 827 if (boothowto & RB_KDB) 828 Debugger(); 829 #endif 830 831 /* We return the new stack pointer address */ 832 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 833 } 834 835 /* 836 * consinit 837 */ 838 void 839 consinit(void) 840 { 841 static int consinit_called; 842 static const bus_addr_t addrs[2] = { 843 IXP425_UART0_HWBASE, IXP425_UART1_HWBASE 844 }; 845 846 if (consinit_called != 0) 847 return; 848 849 consinit_called = 1; 850 851 pmap_devmap_register(nslu2_devmap); 852 853 if (comcnattach(&ixp425_a4x_bs_tag, addrs[comcnunit], 854 comcnspeed, IXP425_UART_FREQ, COM_TYPE_PXA2x0, comcnmode)) 855 panic("can't init serial console (UART%d)", comcnunit); 856 } 857
Indexes created Thu Oct 02 10:09:58 GMT 2025