1 /* $NetBSD: nslu2_machdep.c,v 1.24 2013/08/19 22:26:09 matt 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@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 1.24 2013/08/19 22:26:09 matt 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 #include <sys/bus.h> 114 #include <sys/cpu.h> 115 116 #include <uvm/uvm_extern.h> 117 118 #include <dev/cons.h> 119 120 #include <machine/db_machdep.h> 121 #include <ddb/db_sym.h> 122 #include <ddb/db_extern.h> 123 124 #include <machine/bootconfig.h> 125 #include <arm/locore.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 BootConfig bootconfig; /* Boot config storage */ 155 char *boot_args = NULL; 156 char *boot_file = NULL; 157 158 vm_offset_t physical_start; 159 vm_offset_t physical_freestart; 160 vm_offset_t physical_freeend; 161 vm_offset_t physical_end; 162 u_int free_pages; 163 164 /* Physical and virtual addresses for some global pages */ 165 pv_addr_t minidataclean; 166 167 vm_offset_t msgbufphys; 168 169 extern int end; 170 171 #ifdef PMAP_DEBUG 172 extern int pmap_debug_level; 173 #endif 174 175 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 176 177 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 178 #define KERNEL_PT_KERNEL_NUM 4 179 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 180 /* L2 tables for mapping kernel VM */ 181 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1) 182 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 183 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 184 185 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 186 187 /* Prototypes */ 188 189 void consinit(void); 190 u_int cpu_get_control(void); 191 192 /* 193 * Define the default console speed for the board. This is generally 194 * what the firmware provided with the board defaults to. 195 */ 196 #ifndef CONSPEED 197 #define CONSPEED B115200 198 #endif /* ! CONSPEED */ 199 200 #ifndef CONUNIT 201 #define CONUNIT 0 202 #endif 203 204 #ifndef CONMODE 205 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */ 206 #endif 207 208 int comcnspeed = CONSPEED; 209 int comcnmode = CONMODE; 210 int comcnunit = CONUNIT; 211 212 #if KGDB 213 #ifndef KGDB_DEVNAME 214 #error Must define KGDB_DEVNAME 215 #endif 216 const char kgdb_devname[] = KGDB_DEVNAME; 217 218 #ifndef KGDB_DEVADDR 219 #error Must define KGDB_DEVADDR 220 #endif 221 unsigned long kgdb_devaddr = KGDB_DEVADDR; 222 223 #ifndef KGDB_DEVRATE 224 #define KGDB_DEVRATE CONSPEED 225 #endif 226 int kgdb_devrate = KGDB_DEVRATE; 227 228 #ifndef KGDB_DEVMODE 229 #define KGDB_DEVMODE CONMODE 230 #endif 231 int kgdb_devmode = KGDB_DEVMODE; 232 #endif /* KGDB */ 233 234 /* 235 * void cpu_reboot(int howto, char *bootstr) 236 * 237 * Reboots the system 238 * 239 * Deal with any syncing, unmounting, dumping and shutdown hooks, 240 * then reset the CPU. 241 */ 242 void 243 cpu_reboot(int howto, char *bootstr) 244 { 245 246 #ifdef DIAGNOSTIC 247 /* info */ 248 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 249 #endif 250 251 /* 252 * If we are still cold then hit the air brakes 253 * and crash to earth fast 254 */ 255 if (cold) { 256 doshutdownhooks(); 257 pmf_system_shutdown(boothowto); 258 printf("The operating system has halted.\n"); 259 printf("Please press any key to reboot.\n\n"); 260 cngetc(); 261 goto reset; 262 } 263 264 /* Disable console buffering */ 265 266 /* 267 * If RB_NOSYNC was not specified sync the discs. 268 * Note: Unless cold is set to 1 here, syslogd will die during the 269 * unmount. It looks like syslogd is getting woken up only to find 270 * that it cannot page part of the binary in as the filesystem has 271 * been unmounted. 272 */ 273 if (!(howto & RB_NOSYNC)) 274 bootsync(); 275 276 /* Say NO to interrupts */ 277 splhigh(); 278 279 /* Do a dump if requested. */ 280 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 281 dumpsys(); 282 283 /* Run any shutdown hooks */ 284 doshutdownhooks(); 285 286 pmf_system_shutdown(boothowto); 287 288 /* Make sure IRQ's are disabled */ 289 IRQdisable; 290 291 if ((howto & (RB_HALT | RB_POWERDOWN)) == RB_HALT) { 292 printf("The operating system has halted.\n"); 293 printf("Please press any key to reboot.\n\n"); 294 cngetc(); 295 } 296 297 reset: 298 /* 299 * Make really really sure that all interrupts are disabled, 300 */ 301 (void) disable_interrupts(I32_bit | F32_bit); 302 303 if (howto & RB_POWERDOWN) { 304 uint32_t reg; 305 306 printf("powering down...\n\r"); 307 /* Delay to allow the UART's Tx FIFO to drain */ 308 delay(50000); 309 310 #define GPRD(r) *((volatile uint32_t *)(IXP425_GPIO_VBASE+(r))) 311 #define GPWR(r,v) *((volatile uint32_t *)(IXP425_GPIO_VBASE+(r))) = (v) 312 313 /* 314 * Power-down pin requires a short pulse 315 */ 316 reg = GPRD(IXP425_GPIO_GPOUTR); 317 reg |= 1u << GPIO_POWER_OFF; 318 GPWR(IXP425_GPIO_GPOUTR, reg); 319 320 delay(1000); 321 322 reg = GPRD(IXP425_GPIO_GPOUTR); 323 reg &= ~(1u << GPIO_POWER_OFF); 324 GPWR(IXP425_GPIO_GPOUTR, reg); 325 326 delay(500000); 327 printf("POWER OFF FAILED! TRYING TO REBOOT INSTEAD\n\r"); 328 } 329 330 printf("rebooting...\n\r"); 331 332 #define WDWR(r,v) *((volatile uint32_t *)(IXP425_OST_WDOG_VBASE+(r))) = (v) 333 /* Force a watchdog reset */ 334 WDWR(IXP425_OST_WDOG_KEY, OST_WDOG_KEY_MAJICK); 335 WDWR(IXP425_OST_WDOG_ENAB, OST_WDOG_ENAB_RST_ENA); 336 WDWR(IXP425_OST_WDOG, 0x1000); 337 WDWR(IXP425_OST_WDOG_ENAB, 338 OST_WDOG_ENAB_RST_ENA | OST_WDOG_ENAB_CNT_ENA); 339 340 delay(500000); 341 342 /* ...and if that didn't work, just croak. */ 343 printf("RESET FAILED!\n"); 344 345 for (;;); 346 } 347 348 /* Static device mappings. */ 349 static const struct pmap_devmap nslu2_devmap[] = { 350 /* Physical/Virtual address for I/O space */ 351 { 352 IXP425_IO_VBASE, 353 IXP425_IO_HWBASE, 354 IXP425_IO_SIZE, 355 VM_PROT_READ|VM_PROT_WRITE, 356 PTE_NOCACHE, 357 }, 358 359 /* Expansion Bus */ 360 { 361 IXP425_EXP_VBASE, 362 IXP425_EXP_HWBASE, 363 IXP425_EXP_SIZE, 364 VM_PROT_READ|VM_PROT_WRITE, 365 PTE_NOCACHE, 366 }, 367 368 /* IXP425 PCI Configuration */ 369 { 370 IXP425_PCI_VBASE, 371 IXP425_PCI_HWBASE, 372 IXP425_PCI_SIZE, 373 VM_PROT_READ|VM_PROT_WRITE, 374 PTE_NOCACHE, 375 }, 376 377 /* SDRAM Controller */ 378 { 379 IXP425_MCU_VBASE, 380 IXP425_MCU_HWBASE, 381 IXP425_MCU_SIZE, 382 VM_PROT_READ|VM_PROT_WRITE, 383 PTE_NOCACHE, 384 }, 385 386 /* PCI Memory Space */ 387 { 388 IXP425_PCI_MEM_VBASE, 389 IXP425_PCI_MEM_HWBASE, 390 IXP425_PCI_MEM_SIZE, 391 VM_PROT_READ|VM_PROT_WRITE, 392 PTE_NOCACHE, 393 }, 394 395 /* Flash memory */ 396 { 397 NSLU2_FLASH_VBASE, 398 NSLU2_FLASH_HWBASE, 399 NSLU2_FLASH_SIZE, 400 VM_PROT_READ|VM_PROT_WRITE, 401 PTE_NOCACHE, 402 }, 403 404 { 405 0, 406 0, 407 0, 408 0, 409 0, 410 } 411 }; 412 413 /* 414 * u_int initarm(...) 415 * 416 * Initial entry point on startup. This gets called before main() is 417 * entered. 418 * It should be responsible for setting up everything that must be 419 * in place when main is called. 420 * This includes 421 * Taking a copy of the boot configuration structure. 422 * Initialising the physical console so characters can be printed. 423 * Setting up page tables for the kernel 424 * Relocating the kernel to the bottom of physical memory 425 */ 426 u_int 427 initarm(void *arg) 428 { 429 extern vaddr_t xscale_cache_clean_addr; 430 #ifdef DIAGNOSTIC 431 extern vsize_t xscale_minidata_clean_size; 432 #endif 433 int loop; 434 int loop1; 435 u_int kerneldatasize; 436 u_int l1pagetable; 437 u_int freemempos; 438 uint32_t reg; 439 440 /* 441 * Make sure the power-down GPIO pin is configured correctly, as 442 * cpu_reboot() may be called early on (e.g. from within ddb(9)). 443 */ 444 /* Pin is active-high, so make sure it's driven low */ 445 reg = GPRD(IXP425_GPIO_GPOUTR); 446 reg &= ~(1u << GPIO_POWER_OFF); 447 GPWR(IXP425_GPIO_GPOUTR, reg); 448 449 /* Set as output */ 450 reg = GPRD(IXP425_GPIO_GPOER); 451 reg &= ~(1u << GPIO_POWER_OFF); 452 GPWR(IXP425_GPIO_GPOER, reg); 453 454 /* 455 * Since we map v0xf0000000 == p0xc8000000, it's possible for 456 * us to initialize the console now. 457 */ 458 consinit(); 459 460 #ifdef VERBOSE_INIT_ARM 461 /* Talk to the user */ 462 printf("\nNetBSD/evbarm (Linksys NSLU2) booting ...\n"); 463 #endif 464 465 /* 466 * Heads up ... Setup the CPU / MMU / TLB functions 467 */ 468 if (set_cpufuncs()) 469 panic("cpu not recognized!"); 470 471 /* XXX overwrite bootconfig to hardcoded values */ 472 bootconfig.dramblocks = 1; 473 bootconfig.dram[0].address = 0x10000000; 474 bootconfig.dram[0].pages = ixp425_sdram_size() / PAGE_SIZE; 475 476 kerneldatasize = (uint32_t)&end - (uint32_t)KERNEL_TEXT_BASE; 477 478 #ifdef VERBOSE_INIT_ARM 479 printf("kernsize=0x%x\n", kerneldatasize); 480 #endif 481 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 482 483 /* 484 * Set up the variables that define the availablilty of 485 * physical memory. For now, we're going to set 486 * physical_freestart to 0x10200000 (where the kernel 487 * was loaded), and allocate the memory we need downwards. 488 * If we get too close to the L1 table that we set up, we 489 * will panic. We will update physical_freestart and 490 * physical_freeend later to reflect what pmap_bootstrap() 491 * wants to see. 492 * 493 * XXX pmap_bootstrap() needs an enema. 494 */ 495 physical_start = bootconfig.dram[0].address; 496 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 497 498 physical_freestart = physical_start 499 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 500 physical_freeend = physical_end; 501 502 physmem = (physical_end - physical_start) / PAGE_SIZE; 503 504 /* Tell the user about the memory */ 505 #ifdef VERBOSE_INIT_ARM 506 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 507 physical_start, physical_end - 1); 508 509 printf("Allocating page tables\n"); 510 #endif 511 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 512 513 freemempos = 0x10000000; 514 515 #ifdef VERBOSE_INIT_ARM 516 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 517 physical_start, physical_end); 518 #endif 519 520 /* Define a macro to simplify memory allocation */ 521 #define valloc_pages(var, np) \ 522 alloc_pages((var).pv_pa, (np)); \ 523 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 524 525 #if 0 526 #define alloc_pages(var, np) \ 527 physical_freeend -= ((np) * PAGE_SIZE); \ 528 if (physical_freeend < physical_freestart) \ 529 panic("initarm: out of memory"); \ 530 (var) = physical_freeend; \ 531 free_pages -= (np); \ 532 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 533 #else 534 #define alloc_pages(var, np) \ 535 (var) = freemempos; \ 536 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 537 freemempos += (np) * PAGE_SIZE; 538 #endif 539 540 loop1 = 0; 541 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 542 /* Are we 16KB aligned for an L1 ? */ 543 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 544 && kernel_l1pt.pv_pa == 0) { 545 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 546 } else { 547 valloc_pages(kernel_pt_table[loop1], 548 L2_TABLE_SIZE / PAGE_SIZE); 549 ++loop1; 550 } 551 } 552 553 /* This should never be able to happen but better confirm that. */ 554 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 555 panic("initarm: Failed to align the kernel page directory"); 556 557 /* 558 * Allocate a page for the system page. 559 * This page will just contain the system vectors and can be 560 * shared by all processes. 561 */ 562 alloc_pages(systempage.pv_pa, 1); 563 564 /* Allocate stacks for all modes */ 565 valloc_pages(irqstack, IRQ_STACK_SIZE); 566 valloc_pages(abtstack, ABT_STACK_SIZE); 567 valloc_pages(undstack, UND_STACK_SIZE); 568 valloc_pages(kernelstack, UPAGES); 569 570 /* Allocate enough pages for cleaning the Mini-Data cache. */ 571 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 572 valloc_pages(minidataclean, 1); 573 574 #ifdef VERBOSE_INIT_ARM 575 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 576 irqstack.pv_va); 577 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 578 abtstack.pv_va); 579 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 580 undstack.pv_va); 581 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 582 kernelstack.pv_va); 583 #endif 584 585 /* 586 * XXX Defer this to later so that we can reclaim the memory 587 * XXX used by the RedBoot page tables. 588 */ 589 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 590 591 /* 592 * Ok we have allocated physical pages for the primary kernel 593 * page tables 594 */ 595 596 #ifdef VERBOSE_INIT_ARM 597 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 598 #endif 599 600 /* 601 * Now we start construction of the L1 page table 602 * We start by mapping the L2 page tables into the L1. 603 * This means that we can replace L1 mappings later on if necessary 604 */ 605 l1pagetable = kernel_l1pt.pv_pa; 606 607 /* Map the L2 pages tables in the L1 page table */ 608 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 609 &kernel_pt_table[KERNEL_PT_SYS]); 610 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 611 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 612 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 613 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 614 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 615 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 616 617 /* update the top of the kernel VM */ 618 pmap_curmaxkvaddr = 619 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 620 621 pmap_link_l2pt(l1pagetable, IXP425_IO_VBASE, 622 &kernel_pt_table[KERNEL_PT_IO]); 623 624 #ifdef VERBOSE_INIT_ARM 625 printf("Mapping kernel\n"); 626 #endif 627 628 /* Now we fill in the L2 pagetable for the kernel static code/data */ 629 { 630 extern char etext[], _end[]; 631 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 632 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 633 u_int logical; 634 635 textsize = (textsize + PGOFSET) & ~PGOFSET; 636 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 637 638 logical = 0x00200000; /* offset of kernel in RAM */ 639 640 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 641 physical_start + logical, textsize, 642 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 643 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 644 physical_start + logical, totalsize - textsize, 645 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 646 } 647 648 #ifdef VERBOSE_INIT_ARM 649 printf("Constructing L2 page tables\n"); 650 #endif 651 652 /* Map the stack pages */ 653 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 654 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 655 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 656 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 657 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 658 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 659 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 660 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 661 662 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 663 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 664 665 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 666 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 667 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 668 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 669 } 670 671 /* Map the Mini-Data cache clean area. */ 672 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 673 minidataclean.pv_pa); 674 675 /* Map the vector page. */ 676 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 677 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 678 679 /* 680 * Map the IXP425 registers 681 */ 682 pmap_devmap_bootstrap(l1pagetable, nslu2_devmap); 683 684 /* 685 * Give the XScale global cache clean code an appropriately 686 * sized chunk of unmapped VA space starting at 0xff000000 687 * (our device mappings end before this address). 688 */ 689 xscale_cache_clean_addr = 0xff000000U; 690 691 /* 692 * Now we have the real page tables in place so we can switch to them. 693 * Once this is done we will be running with the REAL kernel page 694 * tables. 695 */ 696 697 /* 698 * Update the physical_freestart/physical_freeend/free_pages 699 * variables. 700 */ 701 { 702 extern char _end[]; 703 704 physical_freestart = physical_start + 705 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 706 KERNEL_BASE); 707 physical_freeend = physical_end; 708 free_pages = 709 (physical_freeend - physical_freestart) / PAGE_SIZE; 710 } 711 712 /* Switch tables */ 713 #ifdef VERBOSE_INIT_ARM 714 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 715 physical_freestart, free_pages, free_pages); 716 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 717 #endif 718 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 719 cpu_setttb(kernel_l1pt.pv_pa, true); 720 cpu_tlb_flushID(); 721 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 722 723 /* 724 * Moved from cpu_startup() as data_abort_handler() references 725 * this during uvm init 726 */ 727 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 728 729 #ifdef VERBOSE_INIT_ARM 730 printf("bootstrap done.\n"); 731 #endif 732 733 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 734 735 /* 736 * Pages were allocated during the secondary bootstrap for the 737 * stacks for different CPU modes. 738 * We must now set the r13 registers in the different CPU modes to 739 * point to these stacks. 740 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 741 * of the stack memory. 742 */ 743 #ifdef VERBOSE_INIT_ARM 744 printf("init subsystems: stacks "); 745 #endif 746 747 set_stackptr(PSR_IRQ32_MODE, 748 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 749 set_stackptr(PSR_ABT32_MODE, 750 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 751 set_stackptr(PSR_UND32_MODE, 752 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 753 754 /* 755 * Well we should set a data abort handler. 756 * Once things get going this will change as we will need a proper 757 * handler. 758 * Until then we will use a handler that just panics but tells us 759 * why. 760 * Initialisation of the vectors will just panic on a data abort. 761 * This just fills in a slightly better one. 762 */ 763 #ifdef VERBOSE_INIT_ARM 764 printf("vectors "); 765 #endif 766 data_abort_handler_address = (u_int)data_abort_handler; 767 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 768 undefined_handler_address = (u_int)undefinedinstruction_bounce; 769 770 /* Initialise the undefined instruction handlers */ 771 #ifdef VERBOSE_INIT_ARM 772 printf("undefined "); 773 #endif 774 undefined_init(); 775 776 /* Load memory into UVM. */ 777 #ifdef VERBOSE_INIT_ARM 778 printf("page "); 779 #endif 780 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 781 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 782 atop(physical_freestart), atop(physical_freeend), 783 VM_FREELIST_DEFAULT); 784 785 /* Boot strap pmap telling it where the kernel page table is */ 786 #ifdef VERBOSE_INIT_ARM 787 printf("pmap "); 788 #endif 789 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 790 791 /* Setup the IRQ system */ 792 #ifdef VERBOSE_INIT_ARM 793 printf("irq "); 794 #endif 795 ixp425_intr_init(); 796 #ifdef VERBOSE_INIT_ARM 797 printf("\nAll initialize done!\nNow Starting NetBSD, Hear we go!\n"); 798 #endif 799 800 #ifdef BOOTHOWTO 801 boothowto = BOOTHOWTO; 802 #endif 803 804 #ifdef DDB 805 db_machine_init(); 806 if (boothowto & RB_KDB) 807 Debugger(); 808 #endif 809 810 /* We return the new stack pointer address */ 811 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 812 } 813 814 /* 815 * consinit 816 */ 817 void 818 consinit(void) 819 { 820 static int consinit_called; 821 static const bus_addr_t addrs[2] = { 822 IXP425_UART0_HWBASE, IXP425_UART1_HWBASE 823 }; 824 825 if (consinit_called != 0) 826 return; 827 828 consinit_called = 1; 829 830 pmap_devmap_register(nslu2_devmap); 831 832 if (comcnattach(&ixp425_a4x_bs_tag, addrs[comcnunit], 833 comcnspeed, IXP425_UART_FREQ, COM_TYPE_PXA2x0, comcnmode)) 834 panic("can't init serial console (UART%d)", comcnunit); 835 } 836