nslu2_machdep.c revision 1.11
1 /* $NetBSD: nslu2_machdep.c,v 1.11 2009/03/14 14:45:59 dsl 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 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by Ichiro FUKUHARA. 47 * 4. The name of the company nor the name of the author may be used to 48 * endorse or promote products derived from this software without specific 49 * prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR 52 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 53 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 54 * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR 55 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 56 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 57 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 58 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 59 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 60 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 61 * SUCH DAMAGE. 62 */ 63 /* 64 * Copyright (c) 1997,1998 Mark Brinicombe. 65 * Copyright (c) 1997,1998 Causality Limited. 66 * All rights reserved. 67 * 68 * Redistribution and use in source and binary forms, with or without 69 * modification, are permitted provided that the following conditions 70 * are met: 71 * 1. Redistributions of source code must retain the above copyright 72 * notice, this list of conditions and the following disclaimer. 73 * 2. Redistributions in binary form must reproduce the above copyright 74 * notice, this list of conditions and the following disclaimer in the 75 * documentation and/or other materials provided with the distribution. 76 * 3. All advertising materials mentioning features or use of this software 77 * must display the following acknowledgement: 78 * This product includes software developed by Mark Brinicombe 79 * for the NetBSD Project. 80 * 4. The name of the company nor the name of the author may be used to 81 * endorse or promote products derived from this software without specific 82 * prior written permission. 83 * 84 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 85 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 86 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 87 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 88 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 89 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 90 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 91 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 92 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 93 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 94 * SUCH DAMAGE. 95 */ 96 97 /* 98 * Machine dependant functions for kernel setup for Linksys NSLU2 99 * using RedBoot firmware. 100 */ 101 102 #include <sys/cdefs.h> 103 __KERNEL_RCSID(0, "$NetBSD: nslu2_machdep.c,v 1.11 2009/03/14 14:45:59 dsl Exp $"); 104 105 #include "opt_ddb.h" 106 #include "opt_kgdb.h" 107 #include "opt_pmap_debug.h" 108 109 #include <sys/param.h> 110 #include <sys/device.h> 111 #include <sys/systm.h> 112 #include <sys/kernel.h> 113 #include <sys/exec.h> 114 #include <sys/proc.h> 115 #include <sys/msgbuf.h> 116 #include <sys/reboot.h> 117 #include <sys/termios.h> 118 #include <sys/ksyms.h> 119 120 #include <uvm/uvm_extern.h> 121 122 #include <dev/cons.h> 123 124 #include <machine/db_machdep.h> 125 #include <ddb/db_sym.h> 126 #include <ddb/db_extern.h> 127 128 #include <machine/bootconfig.h> 129 #include <machine/bus.h> 130 #include <machine/cpu.h> 131 #include <machine/frame.h> 132 #include <arm/undefined.h> 133 134 #include <arm/arm32/machdep.h> 135 136 #include <arm/xscale/ixp425reg.h> 137 #include <arm/xscale/ixp425var.h> 138 #include <arm/xscale/ixp425_sipvar.h> 139 140 #include <evbarm/nslu2/nslu2reg.h> 141 142 #include "com.h" 143 #if NCOM > 0 144 #include <dev/ic/comreg.h> 145 #include <dev/ic/comvar.h> 146 #endif 147 148 #include "ksyms.h" 149 150 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 151 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 152 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 153 154 /* 155 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 156 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 157 */ 158 #define KERNEL_VM_SIZE 0x0C000000 159 160 161 /* 162 * Address to call from cpu_reset() to reset the machine. 163 * This is machine architecture dependant as it varies depending 164 * on where the ROM appears when you turn the MMU off. 165 */ 166 167 u_int cpu_reset_address = 0x00000000; 168 169 /* Define various stack sizes in pages */ 170 #define IRQ_STACK_SIZE 1 171 #define ABT_STACK_SIZE 1 172 #define UND_STACK_SIZE 1 173 174 BootConfig bootconfig; /* Boot config storage */ 175 char *boot_args = NULL; 176 char *boot_file = NULL; 177 178 vm_offset_t physical_start; 179 vm_offset_t physical_freestart; 180 vm_offset_t physical_freeend; 181 vm_offset_t physical_end; 182 u_int free_pages; 183 vm_offset_t pagetables_start; 184 int physmem = 0; 185 186 /* Physical and virtual addresses for some global pages */ 187 pv_addr_t irqstack; 188 pv_addr_t undstack; 189 pv_addr_t abtstack; 190 pv_addr_t kernelstack; 191 pv_addr_t minidataclean; 192 193 vm_offset_t msgbufphys; 194 195 extern u_int data_abort_handler_address; 196 extern u_int prefetch_abort_handler_address; 197 extern u_int undefined_handler_address; 198 extern int end; 199 200 #ifdef PMAP_DEBUG 201 extern int pmap_debug_level; 202 #endif 203 204 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 205 206 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 207 #define KERNEL_PT_KERNEL_NUM 4 208 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 209 /* L2 tables for mapping kernel VM */ 210 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1) 211 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 212 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 213 214 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 215 216 struct user *proc0paddr; 217 218 /* Prototypes */ 219 220 void consinit(void); 221 u_int cpu_get_control(void); 222 223 /* 224 * Define the default console speed for the board. This is generally 225 * what the firmware provided with the board defaults to. 226 */ 227 #ifndef CONSPEED 228 #define CONSPEED B115200 229 #endif /* ! CONSPEED */ 230 231 #ifndef CONUNIT 232 #define CONUNIT 0 233 #endif 234 235 #ifndef CONMODE 236 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */ 237 #endif 238 239 int comcnspeed = CONSPEED; 240 int comcnmode = CONMODE; 241 int comcnunit = CONUNIT; 242 243 #if KGDB 244 #ifndef KGDB_DEVNAME 245 #error Must define KGDB_DEVNAME 246 #endif 247 const char kgdb_devname[] = KGDB_DEVNAME; 248 249 #ifndef KGDB_DEVADDR 250 #error Must define KGDB_DEVADDR 251 #endif 252 unsigned long kgdb_devaddr = KGDB_DEVADDR; 253 254 #ifndef KGDB_DEVRATE 255 #define KGDB_DEVRATE CONSPEED 256 #endif 257 int kgdb_devrate = KGDB_DEVRATE; 258 259 #ifndef KGDB_DEVMODE 260 #define KGDB_DEVMODE CONMODE 261 #endif 262 int kgdb_devmode = KGDB_DEVMODE; 263 #endif /* KGDB */ 264 265 /* 266 * void cpu_reboot(int howto, char *bootstr) 267 * 268 * Reboots the system 269 * 270 * Deal with any syncing, unmounting, dumping and shutdown hooks, 271 * then reset the CPU. 272 */ 273 void 274 cpu_reboot(int howto, char *bootstr) 275 { 276 277 #ifdef DIAGNOSTIC 278 /* info */ 279 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 280 #endif 281 282 /* 283 * If we are still cold then hit the air brakes 284 * and crash to earth fast 285 */ 286 if (cold) { 287 doshutdownhooks(); 288 pmf_system_shutdown(boothowto); 289 printf("The operating system has halted.\n"); 290 printf("Please press any key to reboot.\n\n"); 291 cngetc(); 292 goto reset; 293 } 294 295 /* Disable console buffering */ 296 297 /* 298 * If RB_NOSYNC was not specified sync the discs. 299 * Note: Unless cold is set to 1 here, syslogd will die during the 300 * unmount. It looks like syslogd is getting woken up only to find 301 * that it cannot page part of the binary in as the filesystem has 302 * been unmounted. 303 */ 304 if (!(howto & RB_NOSYNC)) 305 bootsync(); 306 307 /* Say NO to interrupts */ 308 splhigh(); 309 310 /* Do a dump if requested. */ 311 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 312 dumpsys(); 313 314 /* Run any shutdown hooks */ 315 doshutdownhooks(); 316 317 pmf_system_shutdown(boothowto); 318 319 /* Make sure IRQ's are disabled */ 320 IRQdisable; 321 322 if ((howto & (RB_HALT | RB_POWERDOWN)) == RB_HALT) { 323 printf("The operating system has halted.\n"); 324 printf("Please press any key to reboot.\n\n"); 325 cngetc(); 326 } 327 328 reset: 329 /* 330 * Make really really sure that all interrupts are disabled, 331 */ 332 (void) disable_interrupts(I32_bit | F32_bit); 333 334 if (howto & RB_POWERDOWN) { 335 uint32_t reg; 336 337 printf("powering down...\n\r"); 338 /* Delay to allow the UART's Tx FIFO to drain */ 339 delay(50000); 340 341 #define GPRD(r) *((volatile uint32_t *)(IXP425_GPIO_VBASE+(r))) 342 #define GPWR(r,v) *((volatile uint32_t *)(IXP425_GPIO_VBASE+(r))) = (v) 343 344 /* 345 * Power-down pin requires a short pulse 346 */ 347 reg = GPRD(IXP425_GPIO_GPOUTR); 348 reg |= 1u << GPIO_POWER_OFF; 349 GPWR(IXP425_GPIO_GPOUTR, reg); 350 351 delay(1000); 352 353 reg = GPRD(IXP425_GPIO_GPOUTR); 354 reg &= ~(1u << GPIO_POWER_OFF); 355 GPWR(IXP425_GPIO_GPOUTR, reg); 356 357 delay(500000); 358 printf("POWER OFF FAILED! TRYING TO REBOOT INSTEAD\n\r"); 359 } 360 361 printf("rebooting...\n\r"); 362 363 #define WDWR(r,v) *((volatile uint32_t *)(IXP425_OST_WDOG_VBASE+(r))) = (v) 364 /* Force a watchdog reset */ 365 WDWR(IXP425_OST_WDOG_KEY, OST_WDOG_KEY_MAJICK); 366 WDWR(IXP425_OST_WDOG_ENAB, OST_WDOG_ENAB_RST_ENA); 367 WDWR(IXP425_OST_WDOG, 0x1000); 368 WDWR(IXP425_OST_WDOG_ENAB, 369 OST_WDOG_ENAB_RST_ENA | OST_WDOG_ENAB_CNT_ENA); 370 371 delay(500000); 372 373 /* ...and if that didn't work, just croak. */ 374 printf("RESET FAILED!\n"); 375 376 for (;;); 377 } 378 379 /* Static device mappings. */ 380 static const struct pmap_devmap nslu2_devmap[] = { 381 /* Physical/Virtual address for I/O space */ 382 { 383 IXP425_IO_VBASE, 384 IXP425_IO_HWBASE, 385 IXP425_IO_SIZE, 386 VM_PROT_READ|VM_PROT_WRITE, 387 PTE_NOCACHE, 388 }, 389 390 /* Expansion Bus */ 391 { 392 IXP425_EXP_VBASE, 393 IXP425_EXP_HWBASE, 394 IXP425_EXP_SIZE, 395 VM_PROT_READ|VM_PROT_WRITE, 396 PTE_NOCACHE, 397 }, 398 399 /* IXP425 PCI Configuration */ 400 { 401 IXP425_PCI_VBASE, 402 IXP425_PCI_HWBASE, 403 IXP425_PCI_SIZE, 404 VM_PROT_READ|VM_PROT_WRITE, 405 PTE_NOCACHE, 406 }, 407 408 /* SDRAM Controller */ 409 { 410 IXP425_MCU_VBASE, 411 IXP425_MCU_HWBASE, 412 IXP425_MCU_SIZE, 413 VM_PROT_READ|VM_PROT_WRITE, 414 PTE_NOCACHE, 415 }, 416 417 /* PCI Memory Space */ 418 { 419 IXP425_PCI_MEM_VBASE, 420 IXP425_PCI_MEM_HWBASE, 421 IXP425_PCI_MEM_SIZE, 422 VM_PROT_READ|VM_PROT_WRITE, 423 PTE_NOCACHE, 424 }, 425 426 /* Flash memory */ 427 { 428 NSLU2_FLASH_VBASE, 429 NSLU2_FLASH_HWBASE, 430 NSLU2_FLASH_SIZE, 431 VM_PROT_READ|VM_PROT_WRITE, 432 PTE_NOCACHE, 433 }, 434 435 { 436 0, 437 0, 438 0, 439 0, 440 0, 441 } 442 }; 443 444 /* 445 * u_int initarm(...) 446 * 447 * Initial entry point on startup. This gets called before main() is 448 * entered. 449 * It should be responsible for setting up everything that must be 450 * in place when main is called. 451 * This includes 452 * Taking a copy of the boot configuration structure. 453 * Initialising the physical console so characters can be printed. 454 * Setting up page tables for the kernel 455 * Relocating the kernel to the bottom of physical memory 456 */ 457 u_int 458 initarm(void *arg) 459 { 460 extern vaddr_t xscale_cache_clean_addr; 461 #ifdef DIAGNOSTIC 462 extern vsize_t xscale_minidata_clean_size; 463 #endif 464 int loop; 465 int loop1; 466 u_int kerneldatasize; 467 u_int l1pagetable; 468 u_int freemempos; 469 uint32_t reg; 470 471 /* 472 * Make sure the power-down GPIO pin is configured correctly, as 473 * cpu_reboot() may be called early on (e.g. from within ddb(9)). 474 */ 475 /* Pin is active-high, so make sure it's driven low */ 476 reg = GPRD(IXP425_GPIO_GPOUTR); 477 reg &= ~(1u << GPIO_POWER_OFF); 478 GPWR(IXP425_GPIO_GPOUTR, reg); 479 480 /* Set as output */ 481 reg = GPRD(IXP425_GPIO_GPOER); 482 reg &= ~(1u << GPIO_POWER_OFF); 483 GPWR(IXP425_GPIO_GPOER, reg); 484 485 /* 486 * Since we map v0xf0000000 == p0xc8000000, it's possible for 487 * us to initialize the console now. 488 */ 489 consinit(); 490 491 #ifdef VERBOSE_INIT_ARM 492 /* Talk to the user */ 493 printf("\nNetBSD/evbarm (Linksys NSLU2) booting ...\n"); 494 #endif 495 496 /* 497 * Heads up ... Setup the CPU / MMU / TLB functions 498 */ 499 if (set_cpufuncs()) 500 panic("cpu not recognized!"); 501 502 /* XXX overwrite bootconfig to hardcoded values */ 503 bootconfig.dramblocks = 1; 504 bootconfig.dram[0].address = 0x10000000; 505 bootconfig.dram[0].pages = ixp425_sdram_size() / PAGE_SIZE; 506 507 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 508 509 #ifdef VERBOSE_INIT_ARM 510 printf("kernsize=0x%x\n", kerneldatasize); 511 #endif 512 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 513 514 /* 515 * Set up the variables that define the availablilty of 516 * physical memory. For now, we're going to set 517 * physical_freestart to 0x10200000 (where the kernel 518 * was loaded), and allocate the memory we need downwards. 519 * If we get too close to the L1 table that we set up, we 520 * will panic. We will update physical_freestart and 521 * physical_freeend later to reflect what pmap_bootstrap() 522 * wants to see. 523 * 524 * XXX pmap_bootstrap() needs an enema. 525 */ 526 physical_start = bootconfig.dram[0].address; 527 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 528 529 physical_freestart = physical_start 530 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 531 physical_freeend = physical_end; 532 533 physmem = (physical_end - physical_start) / PAGE_SIZE; 534 535 /* Tell the user about the memory */ 536 #ifdef VERBOSE_INIT_ARM 537 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 538 physical_start, physical_end - 1); 539 540 printf("Allocating page tables\n"); 541 #endif 542 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 543 544 freemempos = 0x10000000; 545 546 #ifdef VERBOSE_INIT_ARM 547 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 548 physical_start, physical_end); 549 #endif 550 551 /* Define a macro to simplify memory allocation */ 552 #define valloc_pages(var, np) \ 553 alloc_pages((var).pv_pa, (np)); \ 554 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 555 556 #if 0 557 #define alloc_pages(var, np) \ 558 physical_freeend -= ((np) * PAGE_SIZE); \ 559 if (physical_freeend < physical_freestart) \ 560 panic("initarm: out of memory"); \ 561 (var) = physical_freeend; \ 562 free_pages -= (np); \ 563 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 564 #else 565 #define alloc_pages(var, np) \ 566 (var) = freemempos; \ 567 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 568 freemempos += (np) * PAGE_SIZE; 569 #endif 570 571 loop1 = 0; 572 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 573 /* Are we 16KB aligned for an L1 ? */ 574 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 575 && kernel_l1pt.pv_pa == 0) { 576 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 577 } else { 578 valloc_pages(kernel_pt_table[loop1], 579 L2_TABLE_SIZE / PAGE_SIZE); 580 ++loop1; 581 } 582 } 583 584 /* This should never be able to happen but better confirm that. */ 585 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 586 panic("initarm: Failed to align the kernel page directory"); 587 588 /* 589 * Allocate a page for the system page. 590 * This page will just contain the system vectors and can be 591 * shared by all processes. 592 */ 593 alloc_pages(systempage.pv_pa, 1); 594 595 /* Allocate stacks for all modes */ 596 valloc_pages(irqstack, IRQ_STACK_SIZE); 597 valloc_pages(abtstack, ABT_STACK_SIZE); 598 valloc_pages(undstack, UND_STACK_SIZE); 599 valloc_pages(kernelstack, UPAGES); 600 601 /* Allocate enough pages for cleaning the Mini-Data cache. */ 602 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 603 valloc_pages(minidataclean, 1); 604 605 #ifdef VERBOSE_INIT_ARM 606 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 607 irqstack.pv_va); 608 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 609 abtstack.pv_va); 610 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 611 undstack.pv_va); 612 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 613 kernelstack.pv_va); 614 #endif 615 616 /* 617 * XXX Defer this to later so that we can reclaim the memory 618 * XXX used by the RedBoot page tables. 619 */ 620 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 621 622 /* 623 * Ok we have allocated physical pages for the primary kernel 624 * page tables 625 */ 626 627 #ifdef VERBOSE_INIT_ARM 628 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 629 #endif 630 631 /* 632 * Now we start construction of the L1 page table 633 * We start by mapping the L2 page tables into the L1. 634 * This means that we can replace L1 mappings later on if necessary 635 */ 636 l1pagetable = kernel_l1pt.pv_pa; 637 638 /* Map the L2 pages tables in the L1 page table */ 639 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 640 &kernel_pt_table[KERNEL_PT_SYS]); 641 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 642 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 643 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 644 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 645 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 646 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 647 648 /* update the top of the kernel VM */ 649 pmap_curmaxkvaddr = 650 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 651 652 pmap_link_l2pt(l1pagetable, IXP425_IO_VBASE, 653 &kernel_pt_table[KERNEL_PT_IO]); 654 655 #ifdef VERBOSE_INIT_ARM 656 printf("Mapping kernel\n"); 657 #endif 658 659 /* Now we fill in the L2 pagetable for the kernel static code/data */ 660 { 661 extern char etext[], _end[]; 662 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 663 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 664 u_int logical; 665 666 textsize = (textsize + PGOFSET) & ~PGOFSET; 667 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 668 669 logical = 0x00200000; /* offset of kernel in RAM */ 670 671 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 672 physical_start + logical, textsize, 673 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 674 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 675 physical_start + logical, totalsize - textsize, 676 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 677 } 678 679 #ifdef VERBOSE_INIT_ARM 680 printf("Constructing L2 page tables\n"); 681 #endif 682 683 /* Map the stack pages */ 684 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 685 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 686 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 687 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 688 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 689 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 690 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 691 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 692 693 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 694 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 695 696 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 697 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 698 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 699 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 700 } 701 702 /* Map the Mini-Data cache clean area. */ 703 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 704 minidataclean.pv_pa); 705 706 /* Map the vector page. */ 707 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 708 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 709 710 /* 711 * Map the IXP425 registers 712 */ 713 pmap_devmap_bootstrap(l1pagetable, nslu2_devmap); 714 715 /* 716 * Give the XScale global cache clean code an appropriately 717 * sized chunk of unmapped VA space starting at 0xff000000 718 * (our device mappings end before this address). 719 */ 720 xscale_cache_clean_addr = 0xff000000U; 721 722 /* 723 * Now we have the real page tables in place so we can switch to them. 724 * Once this is done we will be running with the REAL kernel page 725 * tables. 726 */ 727 728 /* 729 * Update the physical_freestart/physical_freeend/free_pages 730 * variables. 731 */ 732 { 733 extern char _end[]; 734 735 physical_freestart = physical_start + 736 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 737 KERNEL_BASE); 738 physical_freeend = physical_end; 739 free_pages = 740 (physical_freeend - physical_freestart) / PAGE_SIZE; 741 } 742 743 /* Switch tables */ 744 #ifdef VERBOSE_INIT_ARM 745 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 746 physical_freestart, free_pages, free_pages); 747 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 748 #endif 749 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 750 setttb(kernel_l1pt.pv_pa); 751 cpu_tlb_flushID(); 752 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 753 754 /* 755 * Moved from cpu_startup() as data_abort_handler() references 756 * this during uvm init 757 */ 758 proc0paddr = (struct user *)kernelstack.pv_va; 759 lwp0.l_addr = proc0paddr; 760 761 #ifdef VERBOSE_INIT_ARM 762 printf("bootstrap done.\n"); 763 #endif 764 765 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 766 767 /* 768 * Pages were allocated during the secondary bootstrap for the 769 * stacks for different CPU modes. 770 * We must now set the r13 registers in the different CPU modes to 771 * point to these stacks. 772 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 773 * of the stack memory. 774 */ 775 #ifdef VERBOSE_INIT_ARM 776 printf("init subsystems: stacks "); 777 #endif 778 779 set_stackptr(PSR_IRQ32_MODE, 780 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 781 set_stackptr(PSR_ABT32_MODE, 782 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 783 set_stackptr(PSR_UND32_MODE, 784 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 785 786 /* 787 * Well we should set a data abort handler. 788 * Once things get going this will change as we will need a proper 789 * handler. 790 * Until then we will use a handler that just panics but tells us 791 * why. 792 * Initialisation of the vectors will just panic on a data abort. 793 * This just fills in a slightly better one. 794 */ 795 #ifdef VERBOSE_INIT_ARM 796 printf("vectors "); 797 #endif 798 data_abort_handler_address = (u_int)data_abort_handler; 799 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 800 undefined_handler_address = (u_int)undefinedinstruction_bounce; 801 802 /* Initialise the undefined instruction handlers */ 803 #ifdef VERBOSE_INIT_ARM 804 printf("undefined "); 805 #endif 806 undefined_init(); 807 808 /* Load memory into UVM. */ 809 #ifdef VERBOSE_INIT_ARM 810 printf("page "); 811 #endif 812 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 813 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 814 atop(physical_freestart), atop(physical_freeend), 815 VM_FREELIST_DEFAULT); 816 817 /* Boot strap pmap telling it where the kernel page table is */ 818 #ifdef VERBOSE_INIT_ARM 819 printf("pmap "); 820 #endif 821 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 822 823 /* Setup the IRQ system */ 824 #ifdef VERBOSE_INIT_ARM 825 printf("irq "); 826 #endif 827 ixp425_intr_init(); 828 #ifdef VERBOSE_INIT_ARM 829 printf("\nAll initialize done!\nNow Starting NetBSD, Hear we go!\n"); 830 #endif 831 832 #ifdef BOOTHOWTO 833 boothowto = BOOTHOWTO; 834 #endif 835 836 #ifdef DDB 837 db_machine_init(); 838 if (boothowto & RB_KDB) 839 Debugger(); 840 #endif 841 842 /* We return the new stack pointer address */ 843 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 844 } 845 846 /* 847 * consinit 848 */ 849 void 850 consinit(void) 851 { 852 static int consinit_called; 853 static const bus_addr_t addrs[2] = { 854 IXP425_UART0_HWBASE, IXP425_UART1_HWBASE 855 }; 856 857 if (consinit_called != 0) 858 return; 859 860 consinit_called = 1; 861 862 pmap_devmap_register(nslu2_devmap); 863 864 if (comcnattach(&ixp425_a4x_bs_tag, addrs[comcnunit], 865 comcnspeed, IXP425_UART_FREQ, COM_TYPE_PXA2x0, comcnmode)) 866 panic("can't init serial console (UART%d)", comcnunit); 867 } 868
Indexes created Thu Oct 02 10:09:58 GMT 2025