nslu2_machdep.c revision 1.2
1 /* $NetBSD: nslu2_machdep.c,v 1.2 2006/03/11 09:09:41 scw 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 1.2 2006/03/11 09:09:41 scw 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 "opt_ipkdb.h" 156 #include "ksyms.h" 157 158 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 159 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 160 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 161 162 /* 163 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 164 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 165 */ 166 #define KERNEL_VM_SIZE 0x0C000000 167 168 169 /* 170 * Address to call from cpu_reset() to reset the machine. 171 * This is machine architecture dependant as it varies depending 172 * on where the ROM appears when you turn the MMU off. 173 */ 174 175 u_int cpu_reset_address = 0x00000000; 176 177 /* Define various stack sizes in pages */ 178 #define IRQ_STACK_SIZE 1 179 #define ABT_STACK_SIZE 1 180 #ifdef IPKDB 181 #define UND_STACK_SIZE 2 182 #else 183 #define UND_STACK_SIZE 1 184 #endif 185 186 BootConfig bootconfig; /* Boot config storage */ 187 char *boot_args = NULL; 188 char *boot_file = NULL; 189 190 vm_offset_t physical_start; 191 vm_offset_t physical_freestart; 192 vm_offset_t physical_freeend; 193 vm_offset_t physical_end; 194 u_int free_pages; 195 vm_offset_t pagetables_start; 196 int physmem = 0; 197 198 /* Physical and virtual addresses for some global pages */ 199 pv_addr_t systempage; 200 pv_addr_t irqstack; 201 pv_addr_t undstack; 202 pv_addr_t abtstack; 203 pv_addr_t kernelstack; 204 pv_addr_t minidataclean; 205 206 vm_offset_t msgbufphys; 207 208 extern u_int data_abort_handler_address; 209 extern u_int prefetch_abort_handler_address; 210 extern u_int undefined_handler_address; 211 extern int end; 212 213 #ifdef PMAP_DEBUG 214 extern int pmap_debug_level; 215 #endif 216 217 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 218 219 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 220 #define KERNEL_PT_KERNEL_NUM 4 221 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 222 /* L2 tables for mapping kernel VM */ 223 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1) 224 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 225 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 226 227 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 228 229 struct user *proc0paddr; 230 231 /* Prototypes */ 232 233 void consinit(void); 234 u_int cpu_get_control __P((void)); 235 236 /* 237 * Define the default console speed for the board. This is generally 238 * what the firmware provided with the board defaults to. 239 */ 240 #ifndef CONSPEED 241 #define CONSPEED B115200 242 #endif /* ! CONSPEED */ 243 244 #ifndef CONUNIT 245 #define CONUNIT 0 246 #endif 247 248 #ifndef CONMODE 249 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */ 250 #endif 251 252 int comcnspeed = CONSPEED; 253 int comcnmode = CONMODE; 254 int comcnunit = CONUNIT; 255 256 #if KGDB 257 #ifndef KGDB_DEVNAME 258 #error Must define KGDB_DEVNAME 259 #endif 260 const char kgdb_devname[] = KGDB_DEVNAME; 261 262 #ifndef KGDB_DEVADDR 263 #error Must define KGDB_DEVADDR 264 #endif 265 unsigned long kgdb_devaddr = KGDB_DEVADDR; 266 267 #ifndef KGDB_DEVRATE 268 #define KGDB_DEVRATE CONSPEED 269 #endif 270 int kgdb_devrate = KGDB_DEVRATE; 271 272 #ifndef KGDB_DEVMODE 273 #define KGDB_DEVMODE CONMODE 274 #endif 275 int kgdb_devmode = KGDB_DEVMODE; 276 #endif /* KGDB */ 277 278 /* 279 * void cpu_reboot(int howto, char *bootstr) 280 * 281 * Reboots the system 282 * 283 * Deal with any syncing, unmounting, dumping and shutdown hooks, 284 * then reset the CPU. 285 */ 286 void 287 cpu_reboot(int howto, char *bootstr) 288 { 289 290 #ifdef DIAGNOSTIC 291 /* info */ 292 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 293 #endif 294 295 /* 296 * If we are still cold then hit the air brakes 297 * and crash to earth fast 298 */ 299 if (cold) { 300 doshutdownhooks(); 301 printf("The operating system has halted.\n"); 302 printf("Please press any key to reboot.\n\n"); 303 cngetc(); 304 goto reset; 305 } 306 307 /* Disable console buffering */ 308 309 /* 310 * If RB_NOSYNC was not specified sync the discs. 311 * Note: Unless cold is set to 1 here, syslogd will die during the 312 * unmount. It looks like syslogd is getting woken up only to find 313 * that it cannot page part of the binary in as the filesystem has 314 * been unmounted. 315 */ 316 if (!(howto & RB_NOSYNC)) 317 bootsync(); 318 319 /* Say NO to interrupts */ 320 splhigh(); 321 322 /* Do a dump if requested. */ 323 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 324 dumpsys(); 325 326 /* Run any shutdown hooks */ 327 doshutdownhooks(); 328 329 /* Make sure IRQ's are disabled */ 330 IRQdisable; 331 332 if ((howto & (RB_HALT | RB_POWERDOWN)) == RB_HALT) { 333 printf("The operating system has halted.\n"); 334 printf("Please press any key to reboot.\n\n"); 335 cngetc(); 336 } 337 338 reset: 339 /* 340 * Make really really sure that all interrupts are disabled, 341 */ 342 (void) disable_interrupts(I32_bit | F32_bit); 343 344 if (howto & RB_POWERDOWN) { 345 uint32_t reg; 346 347 printf("powering down...\n\r"); 348 /* Delay to allow the UART's Tx FIFO to drain */ 349 delay(50000); 350 351 #define GPRD(r) *((volatile uint32_t *)(IXP425_GPIO_VBASE+(r))) 352 #define GPWR(r,v) *((volatile uint32_t *)(IXP425_GPIO_VBASE+(r))) = (v) 353 354 /* 355 * Power-down pin requires a short pulse 356 */ 357 reg = GPRD(IXP425_GPIO_GPOUTR); 358 reg |= 1u << GPIO_POWER_OFF; 359 GPWR(IXP425_GPIO_GPOUTR, reg); 360 361 delay(1000); 362 363 reg = GPRD(IXP425_GPIO_GPOUTR); 364 reg &= ~(1u << GPIO_POWER_OFF); 365 GPWR(IXP425_GPIO_GPOUTR, reg); 366 367 delay(500000); 368 printf("POWER OFF FAILED! TRYING TO REBOOT INSTEAD\n\r"); 369 } 370 371 printf("rebooting...\n\r"); 372 373 #define WDWR(r,v) *((volatile uint32_t *)(IXP425_TIMER_VBASE+(r))) = (v) 374 /* Force a watchdog reset */ 375 WDWR(IXP425_OST_WDOG_KEY, OST_WDOG_KEY_MAJICK); 376 WDWR(IXP425_OST_WDOG_ENAB, OST_WDOG_ENAB_RST_ENA); 377 WDWR(IXP425_OST_WDOG, 0x1000); 378 WDWR(IXP425_OST_WDOG_ENAB, 379 OST_WDOG_ENAB_RST_ENA | OST_WDOG_ENAB_CNT_ENA); 380 381 delay(500000); 382 383 /* ...and if that didn't work, just croak. */ 384 printf("RESET FAILED!\n"); 385 386 for (;;); 387 } 388 389 /* Static device mappings. */ 390 static const struct pmap_devmap nslu2_devmap[] = { 391 /* Physical/Virtual address for I/O space */ 392 { 393 IXP425_IO_VBASE, 394 IXP425_IO_HWBASE, 395 IXP425_IO_SIZE, 396 VM_PROT_READ|VM_PROT_WRITE, 397 PTE_NOCACHE, 398 }, 399 400 /* Expansion Bus */ 401 { 402 IXP425_EXP_VBASE, 403 IXP425_EXP_HWBASE, 404 IXP425_EXP_SIZE, 405 VM_PROT_READ|VM_PROT_WRITE, 406 PTE_NOCACHE, 407 }, 408 409 /* IXP425 PCI Configuration */ 410 { 411 IXP425_PCI_VBASE, 412 IXP425_PCI_HWBASE, 413 IXP425_PCI_SIZE, 414 VM_PROT_READ|VM_PROT_WRITE, 415 PTE_NOCACHE, 416 }, 417 418 /* SDRAM Controller */ 419 { 420 IXP425_MCU_VBASE, 421 IXP425_MCU_HWBASE, 422 IXP425_MCU_SIZE, 423 VM_PROT_READ|VM_PROT_WRITE, 424 PTE_NOCACHE, 425 }, 426 427 /* PCI Memory Space */ 428 { 429 IXP425_PCI_MEM_VBASE, 430 IXP425_PCI_MEM_HWBASE, 431 IXP425_PCI_MEM_SIZE, 432 VM_PROT_READ|VM_PROT_WRITE, 433 PTE_NOCACHE, 434 }, 435 436 /* Flash memory */ 437 { 438 NSLU2_FLASH_VBASE, 439 NSLU2_FLASH_HWBASE, 440 NSLU2_FLASH_SIZE, 441 VM_PROT_READ|VM_PROT_WRITE, 442 PTE_NOCACHE, 443 }, 444 445 { 446 0, 447 0, 448 0, 449 0, 450 0, 451 } 452 }; 453 454 /* 455 * u_int initarm(...) 456 * 457 * Initial entry point on startup. This gets called before main() is 458 * entered. 459 * It should be responsible for setting up everything that must be 460 * in place when main is called. 461 * This includes 462 * Taking a copy of the boot configuration structure. 463 * Initialising the physical console so characters can be printed. 464 * Setting up page tables for the kernel 465 * Relocating the kernel to the bottom of physical memory 466 */ 467 u_int 468 initarm(void *arg) 469 { 470 extern vaddr_t xscale_cache_clean_addr; 471 #ifdef DIAGNOSTIC 472 extern vsize_t xscale_minidata_clean_size; 473 #endif 474 int loop; 475 int loop1; 476 u_int kerneldatasize; 477 u_int l1pagetable; 478 u_int freemempos; 479 pv_addr_t kernel_l1pt; 480 uint32_t reg; 481 482 /* 483 * Make sure the power-down GPIO pin is configured correctly, as 484 * cpu_reboot() may be called early on (e.g. from within ddb(9)). 485 */ 486 /* Pin is active-high, so make sure it's driven low */ 487 reg = GPRD(IXP425_GPIO_GPOUTR); 488 reg &= ~(1u << GPIO_POWER_OFF); 489 GPWR(IXP425_GPIO_GPOUTR, reg); 490 491 /* Set as output */ 492 reg = GPRD(IXP425_GPIO_GPOER); 493 reg &= ~(1u << GPIO_POWER_OFF); 494 GPWR(IXP425_GPIO_GPOER, reg); 495 496 /* 497 * Since we map v0xf0000000 == p0xc8000000, it's possible for 498 * us to initialize the console now. 499 */ 500 consinit(); 501 502 #ifdef VERBOSE_INIT_ARM 503 /* Talk to the user */ 504 printf("\nNetBSD/evbarm (Linksys NSLU2) booting ...\n"); 505 #endif 506 507 /* 508 * Heads up ... Setup the CPU / MMU / TLB functions 509 */ 510 if (set_cpufuncs()) 511 panic("cpu not recognized!"); 512 513 /* XXX overwrite bootconfig to hardcoded values */ 514 bootconfig.dramblocks = 1; 515 bootconfig.dram[0].address = 0x10000000; 516 bootconfig.dram[0].pages = ixp425_sdram_size() / PAGE_SIZE; 517 518 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 519 520 #ifdef VERBOSE_INIT_ARM 521 printf("kernsize=0x%x\n", kerneldatasize); 522 #endif 523 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 524 525 /* 526 * Set up the variables that define the availablilty of 527 * physical memory. For now, we're going to set 528 * physical_freestart to 0x10200000 (where the kernel 529 * was loaded), and allocate the memory we need downwards. 530 * If we get too close to the L1 table that we set up, we 531 * will panic. We will update physical_freestart and 532 * physical_freeend later to reflect what pmap_bootstrap() 533 * wants to see. 534 * 535 * XXX pmap_bootstrap() needs an enema. 536 */ 537 physical_start = bootconfig.dram[0].address; 538 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 539 540 physical_freestart = physical_start 541 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 542 physical_freeend = physical_end; 543 544 physmem = (physical_end - physical_start) / PAGE_SIZE; 545 546 /* Tell the user about the memory */ 547 #ifdef VERBOSE_INIT_ARM 548 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 549 physical_start, physical_end - 1); 550 551 printf("Allocating page tables\n"); 552 #endif 553 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 554 555 freemempos = 0x10000000; 556 557 #ifdef VERBOSE_INIT_ARM 558 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 559 physical_start, physical_end); 560 #endif 561 562 /* Define a macro to simplify memory allocation */ 563 #define valloc_pages(var, np) \ 564 alloc_pages((var).pv_pa, (np)); \ 565 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 566 567 #if 0 568 #define alloc_pages(var, np) \ 569 physical_freeend -= ((np) * PAGE_SIZE); \ 570 if (physical_freeend < physical_freestart) \ 571 panic("initarm: out of memory"); \ 572 (var) = physical_freeend; \ 573 free_pages -= (np); \ 574 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 575 #else 576 #define alloc_pages(var, np) \ 577 (var) = freemempos; \ 578 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 579 freemempos += (np) * PAGE_SIZE; 580 #endif 581 582 loop1 = 0; 583 kernel_l1pt.pv_pa = 0; 584 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 585 /* Are we 16KB aligned for an L1 ? */ 586 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 587 && kernel_l1pt.pv_pa == 0) { 588 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 589 } else { 590 valloc_pages(kernel_pt_table[loop1], 591 L2_TABLE_SIZE / PAGE_SIZE); 592 ++loop1; 593 } 594 } 595 596 /* This should never be able to happen but better confirm that. */ 597 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 598 panic("initarm: Failed to align the kernel page directory"); 599 600 /* 601 * Allocate a page for the system page. 602 * This page will just contain the system vectors and can be 603 * shared by all processes. 604 */ 605 alloc_pages(systempage.pv_pa, 1); 606 607 /* Allocate stacks for all modes */ 608 valloc_pages(irqstack, IRQ_STACK_SIZE); 609 valloc_pages(abtstack, ABT_STACK_SIZE); 610 valloc_pages(undstack, UND_STACK_SIZE); 611 valloc_pages(kernelstack, UPAGES); 612 613 /* Allocate enough pages for cleaning the Mini-Data cache. */ 614 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 615 valloc_pages(minidataclean, 1); 616 617 #ifdef VERBOSE_INIT_ARM 618 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 619 irqstack.pv_va); 620 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 621 abtstack.pv_va); 622 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 623 undstack.pv_va); 624 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 625 kernelstack.pv_va); 626 #endif 627 628 /* 629 * XXX Defer this to later so that we can reclaim the memory 630 * XXX used by the RedBoot page tables. 631 */ 632 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 633 634 /* 635 * Ok we have allocated physical pages for the primary kernel 636 * page tables 637 */ 638 639 #ifdef VERBOSE_INIT_ARM 640 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 641 #endif 642 643 /* 644 * Now we start construction of the L1 page table 645 * We start by mapping the L2 page tables into the L1. 646 * This means that we can replace L1 mappings later on if necessary 647 */ 648 l1pagetable = kernel_l1pt.pv_pa; 649 650 /* Map the L2 pages tables in the L1 page table */ 651 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 652 &kernel_pt_table[KERNEL_PT_SYS]); 653 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 654 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 655 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 656 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 657 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 658 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 659 660 /* update the top of the kernel VM */ 661 pmap_curmaxkvaddr = 662 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 663 664 pmap_link_l2pt(l1pagetable, IXP425_IO_VBASE, 665 &kernel_pt_table[KERNEL_PT_IO]); 666 667 #ifdef VERBOSE_INIT_ARM 668 printf("Mapping kernel\n"); 669 #endif 670 671 /* Now we fill in the L2 pagetable for the kernel static code/data */ 672 { 673 extern char etext[], _end[]; 674 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 675 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 676 u_int logical; 677 678 textsize = (textsize + PGOFSET) & ~PGOFSET; 679 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 680 681 logical = 0x00200000; /* offset of kernel in RAM */ 682 683 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 684 physical_start + logical, textsize, 685 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 686 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 687 physical_start + logical, totalsize - textsize, 688 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 689 } 690 691 #ifdef VERBOSE_INIT_ARM 692 printf("Constructing L2 page tables\n"); 693 #endif 694 695 /* Map the stack pages */ 696 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 697 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 698 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 699 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 700 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 701 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 702 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 703 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 704 705 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 706 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 707 708 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 709 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 710 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 711 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 712 } 713 714 /* Map the Mini-Data cache clean area. */ 715 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 716 minidataclean.pv_pa); 717 718 /* Map the vector page. */ 719 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 720 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 721 722 /* 723 * Map the IXP425 registers 724 */ 725 pmap_devmap_bootstrap(l1pagetable, nslu2_devmap); 726 727 /* 728 * Give the XScale global cache clean code an appropriately 729 * sized chunk of unmapped VA space starting at 0xff000000 730 * (our device mappings end before this address). 731 */ 732 xscale_cache_clean_addr = 0xff000000U; 733 734 /* 735 * Now we have the real page tables in place so we can switch to them. 736 * Once this is done we will be running with the REAL kernel page 737 * tables. 738 */ 739 740 /* 741 * Update the physical_freestart/physical_freeend/free_pages 742 * variables. 743 */ 744 { 745 extern char _end[]; 746 747 physical_freestart = physical_start + 748 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 749 KERNEL_BASE); 750 physical_freeend = physical_end; 751 free_pages = 752 (physical_freeend - physical_freestart) / PAGE_SIZE; 753 } 754 755 /* Switch tables */ 756 #ifdef VERBOSE_INIT_ARM 757 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 758 physical_freestart, free_pages, free_pages); 759 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 760 #endif 761 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 762 setttb(kernel_l1pt.pv_pa); 763 cpu_tlb_flushID(); 764 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 765 766 /* 767 * Moved from cpu_startup() as data_abort_handler() references 768 * this during uvm init 769 */ 770 proc0paddr = (struct user *)kernelstack.pv_va; 771 lwp0.l_addr = proc0paddr; 772 773 #ifdef VERBOSE_INIT_ARM 774 printf("bootstrap done.\n"); 775 #endif 776 777 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 778 779 /* 780 * Pages were allocated during the secondary bootstrap for the 781 * stacks for different CPU modes. 782 * We must now set the r13 registers in the different CPU modes to 783 * point to these stacks. 784 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 785 * of the stack memory. 786 */ 787 #ifdef VERBOSE_INIT_ARM 788 printf("init subsystems: stacks "); 789 #endif 790 791 set_stackptr(PSR_IRQ32_MODE, 792 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 793 set_stackptr(PSR_ABT32_MODE, 794 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 795 set_stackptr(PSR_UND32_MODE, 796 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 797 798 /* 799 * Well we should set a data abort handler. 800 * Once things get going this will change as we will need a proper 801 * handler. 802 * Until then we will use a handler that just panics but tells us 803 * why. 804 * Initialisation of the vectors will just panic on a data abort. 805 * This just fills in a slightly better one. 806 */ 807 #ifdef VERBOSE_INIT_ARM 808 printf("vectors "); 809 #endif 810 data_abort_handler_address = (u_int)data_abort_handler; 811 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 812 undefined_handler_address = (u_int)undefinedinstruction_bounce; 813 814 /* Initialise the undefined instruction handlers */ 815 #ifdef VERBOSE_INIT_ARM 816 printf("undefined "); 817 #endif 818 undefined_init(); 819 820 /* Load memory into UVM. */ 821 #ifdef VERBOSE_INIT_ARM 822 printf("page "); 823 #endif 824 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 825 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 826 atop(physical_freestart), atop(physical_freeend), 827 VM_FREELIST_DEFAULT); 828 829 /* Boot strap pmap telling it where the kernel page table is */ 830 #ifdef VERBOSE_INIT_ARM 831 printf("pmap "); 832 #endif 833 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 834 KERNEL_VM_BASE + KERNEL_VM_SIZE); 835 836 /* Setup the IRQ system */ 837 #ifdef VERBOSE_INIT_ARM 838 printf("irq "); 839 #endif 840 ixp425_intr_init(); 841 #ifdef VERBOSE_INIT_ARM 842 printf("\nAll initialize done!\nNow Starting NetBSD, Hear we go!\n"); 843 #endif 844 845 #ifdef BOOTHOWTO 846 boothowto = BOOTHOWTO; 847 #endif 848 849 #ifdef IPKDB 850 /* Initialise ipkdb */ 851 ipkdb_init(); 852 if (boothowto & RB_KDB) 853 ipkdb_connect(0); 854 #endif 855 856 #if NKSYMS || defined(DDB) || defined(LKM) 857 /* Firmware doesn't load symbols. */ 858 ksyms_init(0, NULL, NULL); 859 #endif 860 861 #ifdef DDB 862 db_machine_init(); 863 if (boothowto & RB_KDB) 864 Debugger(); 865 #endif 866 867 /* We return the new stack pointer address */ 868 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 869 } 870 871 /* 872 * consinit 873 */ 874 void 875 consinit(void) 876 { 877 static int consinit_called; 878 static const bus_addr_t addrs[2] = { 879 IXP425_UART0_HWBASE, IXP425_UART1_HWBASE 880 }; 881 882 if (consinit_called != 0) 883 return; 884 885 consinit_called = 1; 886 887 pmap_devmap_register(nslu2_devmap); 888 889 if (comcnattach(&ixp425_a4x_bs_tag, addrs[comcnunit], 890 comcnspeed, IXP425_UART_FREQ, COM_TYPE_PXA2x0, comcnmode)) 891 panic("can't init serial console (UART%d)", comcnunit); 892 } 893
Indexes created Thu Oct 02 14:10:14 GMT 2025