nslu2_machdep.c revision 1.3.6.4
1 /* $NetBSD: nslu2_machdep.c,v 1.3.6.4 2008/01/21 09:36:15 yamt 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 /* 39 * Copyright (c) 2003 40 * Ichiro FUKUHARA <ichiro (at) ichiro.org>. 41 * All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by Ichiro FUKUHARA. 54 * 4. The name of the company nor the name of the author may be used to 55 * endorse or promote products derived from this software without specific 56 * prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR 59 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 60 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 61 * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR 62 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 */ 70 /* 71 * Copyright (c) 1997,1998 Mark Brinicombe. 72 * Copyright (c) 1997,1998 Causality Limited. 73 * All rights reserved. 74 * 75 * Redistribution and use in source and binary forms, with or without 76 * modification, are permitted provided that the following conditions 77 * are met: 78 * 1. Redistributions of source code must retain the above copyright 79 * notice, this list of conditions and the following disclaimer. 80 * 2. Redistributions in binary form must reproduce the above copyright 81 * notice, this list of conditions and the following disclaimer in the 82 * documentation and/or other materials provided with the distribution. 83 * 3. All advertising materials mentioning features or use of this software 84 * must display the following acknowledgement: 85 * This product includes software developed by Mark Brinicombe 86 * for the NetBSD Project. 87 * 4. The name of the company nor the name of the author may be used to 88 * endorse or promote products derived from this software without specific 89 * prior written permission. 90 * 91 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 92 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 93 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 94 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 95 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 96 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 97 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 98 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 99 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 100 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 101 * SUCH DAMAGE. 102 */ 103 104 /* 105 * Machine dependant functions for kernel setup for Linksys NSLU2 106 * using RedBoot firmware. 107 */ 108 109 #include <sys/cdefs.h> 110 __KERNEL_RCSID(0, "$NetBSD: nslu2_machdep.c,v 1.3.6.4 2008/01/21 09:36:15 yamt Exp $"); 111 112 #include "opt_ddb.h" 113 #include "opt_kgdb.h" 114 #include "opt_pmap_debug.h" 115 116 #include <sys/param.h> 117 #include <sys/device.h> 118 #include <sys/systm.h> 119 #include <sys/kernel.h> 120 #include <sys/exec.h> 121 #include <sys/proc.h> 122 #include <sys/msgbuf.h> 123 #include <sys/reboot.h> 124 #include <sys/termios.h> 125 #include <sys/ksyms.h> 126 127 #include <uvm/uvm_extern.h> 128 129 #include <dev/cons.h> 130 131 #include <machine/db_machdep.h> 132 #include <ddb/db_sym.h> 133 #include <ddb/db_extern.h> 134 135 #include <machine/bootconfig.h> 136 #include <machine/bus.h> 137 #include <machine/cpu.h> 138 #include <machine/frame.h> 139 #include <arm/undefined.h> 140 141 #include <arm/arm32/machdep.h> 142 143 #include <arm/xscale/ixp425reg.h> 144 #include <arm/xscale/ixp425var.h> 145 #include <arm/xscale/ixp425_sipvar.h> 146 147 #include <evbarm/nslu2/nslu2reg.h> 148 149 #include "com.h" 150 #if NCOM > 0 151 #include <dev/ic/comreg.h> 152 #include <dev/ic/comvar.h> 153 #endif 154 155 #include "ksyms.h" 156 157 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 158 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 159 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 160 161 /* 162 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 163 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 164 */ 165 #define KERNEL_VM_SIZE 0x0C000000 166 167 168 /* 169 * Address to call from cpu_reset() to reset the machine. 170 * This is machine architecture dependant as it varies depending 171 * on where the ROM appears when you turn the MMU off. 172 */ 173 174 u_int cpu_reset_address = 0x00000000; 175 176 /* Define various stack sizes in pages */ 177 #define IRQ_STACK_SIZE 1 178 #define ABT_STACK_SIZE 1 179 #define UND_STACK_SIZE 1 180 181 BootConfig bootconfig; /* Boot config storage */ 182 char *boot_args = NULL; 183 char *boot_file = NULL; 184 185 vm_offset_t physical_start; 186 vm_offset_t physical_freestart; 187 vm_offset_t physical_freeend; 188 vm_offset_t physical_end; 189 u_int free_pages; 190 vm_offset_t pagetables_start; 191 int physmem = 0; 192 193 /* Physical and virtual addresses for some global pages */ 194 pv_addr_t systempage; 195 pv_addr_t irqstack; 196 pv_addr_t undstack; 197 pv_addr_t abtstack; 198 pv_addr_t kernelstack; 199 pv_addr_t minidataclean; 200 201 vm_offset_t msgbufphys; 202 203 extern u_int data_abort_handler_address; 204 extern u_int prefetch_abort_handler_address; 205 extern u_int undefined_handler_address; 206 extern int end; 207 208 #ifdef PMAP_DEBUG 209 extern int pmap_debug_level; 210 #endif 211 212 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 213 214 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 215 #define KERNEL_PT_KERNEL_NUM 4 216 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 217 /* L2 tables for mapping kernel VM */ 218 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1) 219 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 220 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 221 222 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 223 224 struct user *proc0paddr; 225 226 /* Prototypes */ 227 228 void consinit(void); 229 u_int cpu_get_control __P((void)); 230 231 /* 232 * Define the default console speed for the board. This is generally 233 * what the firmware provided with the board defaults to. 234 */ 235 #ifndef CONSPEED 236 #define CONSPEED B115200 237 #endif /* ! CONSPEED */ 238 239 #ifndef CONUNIT 240 #define CONUNIT 0 241 #endif 242 243 #ifndef CONMODE 244 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */ 245 #endif 246 247 int comcnspeed = CONSPEED; 248 int comcnmode = CONMODE; 249 int comcnunit = CONUNIT; 250 251 #if KGDB 252 #ifndef KGDB_DEVNAME 253 #error Must define KGDB_DEVNAME 254 #endif 255 const char kgdb_devname[] = KGDB_DEVNAME; 256 257 #ifndef KGDB_DEVADDR 258 #error Must define KGDB_DEVADDR 259 #endif 260 unsigned long kgdb_devaddr = KGDB_DEVADDR; 261 262 #ifndef KGDB_DEVRATE 263 #define KGDB_DEVRATE CONSPEED 264 #endif 265 int kgdb_devrate = KGDB_DEVRATE; 266 267 #ifndef KGDB_DEVMODE 268 #define KGDB_DEVMODE CONMODE 269 #endif 270 int kgdb_devmode = KGDB_DEVMODE; 271 #endif /* KGDB */ 272 273 /* 274 * void cpu_reboot(int howto, char *bootstr) 275 * 276 * Reboots the system 277 * 278 * Deal with any syncing, unmounting, dumping and shutdown hooks, 279 * then reset the CPU. 280 */ 281 void 282 cpu_reboot(int howto, char *bootstr) 283 { 284 285 #ifdef DIAGNOSTIC 286 /* info */ 287 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 288 #endif 289 290 /* 291 * If we are still cold then hit the air brakes 292 * and crash to earth fast 293 */ 294 if (cold) { 295 doshutdownhooks(); 296 printf("The operating system has halted.\n"); 297 printf("Please press any key to reboot.\n\n"); 298 cngetc(); 299 goto reset; 300 } 301 302 /* Disable console buffering */ 303 304 /* 305 * If RB_NOSYNC was not specified sync the discs. 306 * Note: Unless cold is set to 1 here, syslogd will die during the 307 * unmount. It looks like syslogd is getting woken up only to find 308 * that it cannot page part of the binary in as the filesystem has 309 * been unmounted. 310 */ 311 if (!(howto & RB_NOSYNC)) 312 bootsync(); 313 314 /* Say NO to interrupts */ 315 splhigh(); 316 317 /* Do a dump if requested. */ 318 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 319 dumpsys(); 320 321 /* Run any shutdown hooks */ 322 doshutdownhooks(); 323 324 /* Make sure IRQ's are disabled */ 325 IRQdisable; 326 327 if ((howto & (RB_HALT | RB_POWERDOWN)) == RB_HALT) { 328 printf("The operating system has halted.\n"); 329 printf("Please press any key to reboot.\n\n"); 330 cngetc(); 331 } 332 333 reset: 334 /* 335 * Make really really sure that all interrupts are disabled, 336 */ 337 (void) disable_interrupts(I32_bit | F32_bit); 338 339 if (howto & RB_POWERDOWN) { 340 uint32_t reg; 341 342 printf("powering down...\n\r"); 343 /* Delay to allow the UART's Tx FIFO to drain */ 344 delay(50000); 345 346 #define GPRD(r) *((volatile uint32_t *)(IXP425_GPIO_VBASE+(r))) 347 #define GPWR(r,v) *((volatile uint32_t *)(IXP425_GPIO_VBASE+(r))) = (v) 348 349 /* 350 * Power-down pin requires a short pulse 351 */ 352 reg = GPRD(IXP425_GPIO_GPOUTR); 353 reg |= 1u << GPIO_POWER_OFF; 354 GPWR(IXP425_GPIO_GPOUTR, reg); 355 356 delay(1000); 357 358 reg = GPRD(IXP425_GPIO_GPOUTR); 359 reg &= ~(1u << GPIO_POWER_OFF); 360 GPWR(IXP425_GPIO_GPOUTR, reg); 361 362 delay(500000); 363 printf("POWER OFF FAILED! TRYING TO REBOOT INSTEAD\n\r"); 364 } 365 366 printf("rebooting...\n\r"); 367 368 #define WDWR(r,v) *((volatile uint32_t *)(IXP425_OST_WDOG_VBASE+(r))) = (v) 369 /* Force a watchdog reset */ 370 WDWR(IXP425_OST_WDOG_KEY, OST_WDOG_KEY_MAJICK); 371 WDWR(IXP425_OST_WDOG_ENAB, OST_WDOG_ENAB_RST_ENA); 372 WDWR(IXP425_OST_WDOG, 0x1000); 373 WDWR(IXP425_OST_WDOG_ENAB, 374 OST_WDOG_ENAB_RST_ENA | OST_WDOG_ENAB_CNT_ENA); 375 376 delay(500000); 377 378 /* ...and if that didn't work, just croak. */ 379 printf("RESET FAILED!\n"); 380 381 for (;;); 382 } 383 384 /* Static device mappings. */ 385 static const struct pmap_devmap nslu2_devmap[] = { 386 /* Physical/Virtual address for I/O space */ 387 { 388 IXP425_IO_VBASE, 389 IXP425_IO_HWBASE, 390 IXP425_IO_SIZE, 391 VM_PROT_READ|VM_PROT_WRITE, 392 PTE_NOCACHE, 393 }, 394 395 /* Expansion Bus */ 396 { 397 IXP425_EXP_VBASE, 398 IXP425_EXP_HWBASE, 399 IXP425_EXP_SIZE, 400 VM_PROT_READ|VM_PROT_WRITE, 401 PTE_NOCACHE, 402 }, 403 404 /* IXP425 PCI Configuration */ 405 { 406 IXP425_PCI_VBASE, 407 IXP425_PCI_HWBASE, 408 IXP425_PCI_SIZE, 409 VM_PROT_READ|VM_PROT_WRITE, 410 PTE_NOCACHE, 411 }, 412 413 /* SDRAM Controller */ 414 { 415 IXP425_MCU_VBASE, 416 IXP425_MCU_HWBASE, 417 IXP425_MCU_SIZE, 418 VM_PROT_READ|VM_PROT_WRITE, 419 PTE_NOCACHE, 420 }, 421 422 /* PCI Memory Space */ 423 { 424 IXP425_PCI_MEM_VBASE, 425 IXP425_PCI_MEM_HWBASE, 426 IXP425_PCI_MEM_SIZE, 427 VM_PROT_READ|VM_PROT_WRITE, 428 PTE_NOCACHE, 429 }, 430 431 /* Flash memory */ 432 { 433 NSLU2_FLASH_VBASE, 434 NSLU2_FLASH_HWBASE, 435 NSLU2_FLASH_SIZE, 436 VM_PROT_READ|VM_PROT_WRITE, 437 PTE_NOCACHE, 438 }, 439 440 { 441 0, 442 0, 443 0, 444 0, 445 0, 446 } 447 }; 448 449 /* 450 * u_int initarm(...) 451 * 452 * Initial entry point on startup. This gets called before main() is 453 * entered. 454 * It should be responsible for setting up everything that must be 455 * in place when main is called. 456 * This includes 457 * Taking a copy of the boot configuration structure. 458 * Initialising the physical console so characters can be printed. 459 * Setting up page tables for the kernel 460 * Relocating the kernel to the bottom of physical memory 461 */ 462 u_int 463 initarm(void *arg) 464 { 465 extern vaddr_t xscale_cache_clean_addr; 466 #ifdef DIAGNOSTIC 467 extern vsize_t xscale_minidata_clean_size; 468 #endif 469 int loop; 470 int loop1; 471 u_int kerneldatasize; 472 u_int l1pagetable; 473 u_int freemempos; 474 pv_addr_t kernel_l1pt; 475 uint32_t reg; 476 477 /* 478 * Make sure the power-down GPIO pin is configured correctly, as 479 * cpu_reboot() may be called early on (e.g. from within ddb(9)). 480 */ 481 /* Pin is active-high, so make sure it's driven low */ 482 reg = GPRD(IXP425_GPIO_GPOUTR); 483 reg &= ~(1u << GPIO_POWER_OFF); 484 GPWR(IXP425_GPIO_GPOUTR, reg); 485 486 /* Set as output */ 487 reg = GPRD(IXP425_GPIO_GPOER); 488 reg &= ~(1u << GPIO_POWER_OFF); 489 GPWR(IXP425_GPIO_GPOER, reg); 490 491 /* 492 * Since we map v0xf0000000 == p0xc8000000, it's possible for 493 * us to initialize the console now. 494 */ 495 consinit(); 496 497 #ifdef VERBOSE_INIT_ARM 498 /* Talk to the user */ 499 printf("\nNetBSD/evbarm (Linksys NSLU2) booting ...\n"); 500 #endif 501 502 /* 503 * Heads up ... Setup the CPU / MMU / TLB functions 504 */ 505 if (set_cpufuncs()) 506 panic("cpu not recognized!"); 507 508 /* XXX overwrite bootconfig to hardcoded values */ 509 bootconfig.dramblocks = 1; 510 bootconfig.dram[0].address = 0x10000000; 511 bootconfig.dram[0].pages = ixp425_sdram_size() / PAGE_SIZE; 512 513 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 514 515 #ifdef VERBOSE_INIT_ARM 516 printf("kernsize=0x%x\n", kerneldatasize); 517 #endif 518 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 519 520 /* 521 * Set up the variables that define the availablilty of 522 * physical memory. For now, we're going to set 523 * physical_freestart to 0x10200000 (where the kernel 524 * was loaded), and allocate the memory we need downwards. 525 * If we get too close to the L1 table that we set up, we 526 * will panic. We will update physical_freestart and 527 * physical_freeend later to reflect what pmap_bootstrap() 528 * wants to see. 529 * 530 * XXX pmap_bootstrap() needs an enema. 531 */ 532 physical_start = bootconfig.dram[0].address; 533 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 534 535 physical_freestart = physical_start 536 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 537 physical_freeend = physical_end; 538 539 physmem = (physical_end - physical_start) / PAGE_SIZE; 540 541 /* Tell the user about the memory */ 542 #ifdef VERBOSE_INIT_ARM 543 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 544 physical_start, physical_end - 1); 545 546 printf("Allocating page tables\n"); 547 #endif 548 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 549 550 freemempos = 0x10000000; 551 552 #ifdef VERBOSE_INIT_ARM 553 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 554 physical_start, physical_end); 555 #endif 556 557 /* Define a macro to simplify memory allocation */ 558 #define valloc_pages(var, np) \ 559 alloc_pages((var).pv_pa, (np)); \ 560 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 561 562 #if 0 563 #define alloc_pages(var, np) \ 564 physical_freeend -= ((np) * PAGE_SIZE); \ 565 if (physical_freeend < physical_freestart) \ 566 panic("initarm: out of memory"); \ 567 (var) = physical_freeend; \ 568 free_pages -= (np); \ 569 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 570 #else 571 #define alloc_pages(var, np) \ 572 (var) = freemempos; \ 573 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 574 freemempos += (np) * PAGE_SIZE; 575 #endif 576 577 loop1 = 0; 578 kernel_l1pt.pv_pa = 0; 579 kernel_l1pt.pv_va = 0; 580 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 581 /* Are we 16KB aligned for an L1 ? */ 582 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 583 && kernel_l1pt.pv_pa == 0) { 584 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 585 } else { 586 valloc_pages(kernel_pt_table[loop1], 587 L2_TABLE_SIZE / PAGE_SIZE); 588 ++loop1; 589 } 590 } 591 592 /* This should never be able to happen but better confirm that. */ 593 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 594 panic("initarm: Failed to align the kernel page directory"); 595 596 /* 597 * Allocate a page for the system page. 598 * This page will just contain the system vectors and can be 599 * shared by all processes. 600 */ 601 alloc_pages(systempage.pv_pa, 1); 602 603 /* Allocate stacks for all modes */ 604 valloc_pages(irqstack, IRQ_STACK_SIZE); 605 valloc_pages(abtstack, ABT_STACK_SIZE); 606 valloc_pages(undstack, UND_STACK_SIZE); 607 valloc_pages(kernelstack, UPAGES); 608 609 /* Allocate enough pages for cleaning the Mini-Data cache. */ 610 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 611 valloc_pages(minidataclean, 1); 612 613 #ifdef VERBOSE_INIT_ARM 614 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 615 irqstack.pv_va); 616 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 617 abtstack.pv_va); 618 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 619 undstack.pv_va); 620 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 621 kernelstack.pv_va); 622 #endif 623 624 /* 625 * XXX Defer this to later so that we can reclaim the memory 626 * XXX used by the RedBoot page tables. 627 */ 628 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 629 630 /* 631 * Ok we have allocated physical pages for the primary kernel 632 * page tables 633 */ 634 635 #ifdef VERBOSE_INIT_ARM 636 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 637 #endif 638 639 /* 640 * Now we start construction of the L1 page table 641 * We start by mapping the L2 page tables into the L1. 642 * This means that we can replace L1 mappings later on if necessary 643 */ 644 l1pagetable = kernel_l1pt.pv_pa; 645 646 /* Map the L2 pages tables in the L1 page table */ 647 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 648 &kernel_pt_table[KERNEL_PT_SYS]); 649 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 650 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 651 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 652 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 653 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 654 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 655 656 /* update the top of the kernel VM */ 657 pmap_curmaxkvaddr = 658 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 659 660 pmap_link_l2pt(l1pagetable, IXP425_IO_VBASE, 661 &kernel_pt_table[KERNEL_PT_IO]); 662 663 #ifdef VERBOSE_INIT_ARM 664 printf("Mapping kernel\n"); 665 #endif 666 667 /* Now we fill in the L2 pagetable for the kernel static code/data */ 668 { 669 extern char etext[], _end[]; 670 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 671 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 672 u_int logical; 673 674 textsize = (textsize + PGOFSET) & ~PGOFSET; 675 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 676 677 logical = 0x00200000; /* offset of kernel in RAM */ 678 679 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 680 physical_start + logical, textsize, 681 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 682 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 683 physical_start + logical, totalsize - textsize, 684 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 685 } 686 687 #ifdef VERBOSE_INIT_ARM 688 printf("Constructing L2 page tables\n"); 689 #endif 690 691 /* Map the stack pages */ 692 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 693 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 694 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 695 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 696 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 697 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 698 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 699 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 700 701 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 702 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 703 704 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 705 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 706 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 707 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 708 } 709 710 /* Map the Mini-Data cache clean area. */ 711 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 712 minidataclean.pv_pa); 713 714 /* Map the vector page. */ 715 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 716 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 717 718 /* 719 * Map the IXP425 registers 720 */ 721 pmap_devmap_bootstrap(l1pagetable, nslu2_devmap); 722 723 /* 724 * Give the XScale global cache clean code an appropriately 725 * sized chunk of unmapped VA space starting at 0xff000000 726 * (our device mappings end before this address). 727 */ 728 xscale_cache_clean_addr = 0xff000000U; 729 730 /* 731 * Now we have the real page tables in place so we can switch to them. 732 * Once this is done we will be running with the REAL kernel page 733 * tables. 734 */ 735 736 /* 737 * Update the physical_freestart/physical_freeend/free_pages 738 * variables. 739 */ 740 { 741 extern char _end[]; 742 743 physical_freestart = physical_start + 744 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 745 KERNEL_BASE); 746 physical_freeend = physical_end; 747 free_pages = 748 (physical_freeend - physical_freestart) / PAGE_SIZE; 749 } 750 751 /* Switch tables */ 752 #ifdef VERBOSE_INIT_ARM 753 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 754 physical_freestart, free_pages, free_pages); 755 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 756 #endif 757 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 758 setttb(kernel_l1pt.pv_pa); 759 cpu_tlb_flushID(); 760 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 761 762 /* 763 * Moved from cpu_startup() as data_abort_handler() references 764 * this during uvm init 765 */ 766 proc0paddr = (struct user *)kernelstack.pv_va; 767 lwp0.l_addr = proc0paddr; 768 769 #ifdef VERBOSE_INIT_ARM 770 printf("bootstrap done.\n"); 771 #endif 772 773 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 774 775 /* 776 * Pages were allocated during the secondary bootstrap for the 777 * stacks for different CPU modes. 778 * We must now set the r13 registers in the different CPU modes to 779 * point to these stacks. 780 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 781 * of the stack memory. 782 */ 783 #ifdef VERBOSE_INIT_ARM 784 printf("init subsystems: stacks "); 785 #endif 786 787 set_stackptr(PSR_IRQ32_MODE, 788 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 789 set_stackptr(PSR_ABT32_MODE, 790 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 791 set_stackptr(PSR_UND32_MODE, 792 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 793 794 /* 795 * Well we should set a data abort handler. 796 * Once things get going this will change as we will need a proper 797 * handler. 798 * Until then we will use a handler that just panics but tells us 799 * why. 800 * Initialisation of the vectors will just panic on a data abort. 801 * This just fills in a slightly better one. 802 */ 803 #ifdef VERBOSE_INIT_ARM 804 printf("vectors "); 805 #endif 806 data_abort_handler_address = (u_int)data_abort_handler; 807 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 808 undefined_handler_address = (u_int)undefinedinstruction_bounce; 809 810 /* Initialise the undefined instruction handlers */ 811 #ifdef VERBOSE_INIT_ARM 812 printf("undefined "); 813 #endif 814 undefined_init(); 815 816 /* Load memory into UVM. */ 817 #ifdef VERBOSE_INIT_ARM 818 printf("page "); 819 #endif 820 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 821 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 822 atop(physical_freestart), atop(physical_freeend), 823 VM_FREELIST_DEFAULT); 824 825 /* Boot strap pmap telling it where the kernel page table is */ 826 #ifdef VERBOSE_INIT_ARM 827 printf("pmap "); 828 #endif 829 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 830 KERNEL_VM_BASE + KERNEL_VM_SIZE); 831 832 /* Setup the IRQ system */ 833 #ifdef VERBOSE_INIT_ARM 834 printf("irq "); 835 #endif 836 ixp425_intr_init(); 837 #ifdef VERBOSE_INIT_ARM 838 printf("\nAll initialize done!\nNow Starting NetBSD, Hear we go!\n"); 839 #endif 840 841 #ifdef BOOTHOWTO 842 boothowto = BOOTHOWTO; 843 #endif 844 845 #if NKSYMS || defined(DDB) || defined(LKM) 846 /* Firmware doesn't load symbols. */ 847 ksyms_init(0, NULL, NULL); 848 #endif 849 850 #ifdef DDB 851 db_machine_init(); 852 if (boothowto & RB_KDB) 853 Debugger(); 854 #endif 855 856 /* We return the new stack pointer address */ 857 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 858 } 859 860 /* 861 * consinit 862 */ 863 void 864 consinit(void) 865 { 866 static int consinit_called; 867 static const bus_addr_t addrs[2] = { 868 IXP425_UART0_HWBASE, IXP425_UART1_HWBASE 869 }; 870 871 if (consinit_called != 0) 872 return; 873 874 consinit_called = 1; 875 876 pmap_devmap_register(nslu2_devmap); 877 878 if (comcnattach(&ixp425_a4x_bs_tag, addrs[comcnunit], 879 comcnspeed, IXP425_UART_FREQ, COM_TYPE_PXA2x0, comcnmode)) 880 panic("can't init serial console (UART%d)", comcnunit); 881 } 882
Indexes created Mon Oct 20 11:09:49 GMT 2025