nslu2_machdep.c revision 1.5.6.1
1 /* $NetBSD: nslu2_machdep.c,v 1.5.6.1 2008/06/02 13:22:02 mjf 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 1.5.6.1 2008/06/02 13:22:02 mjf 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 __P((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 printf("The operating system has halted.\n"); 289 printf("Please press any key to reboot.\n\n"); 290 cngetc(); 291 goto reset; 292 } 293 294 /* Disable console buffering */ 295 296 /* 297 * If RB_NOSYNC was not specified sync the discs. 298 * Note: Unless cold is set to 1 here, syslogd will die during the 299 * unmount. It looks like syslogd is getting woken up only to find 300 * that it cannot page part of the binary in as the filesystem has 301 * been unmounted. 302 */ 303 if (!(howto & RB_NOSYNC)) 304 bootsync(); 305 306 /* Say NO to interrupts */ 307 splhigh(); 308 309 /* Do a dump if requested. */ 310 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 311 dumpsys(); 312 313 /* Run any shutdown hooks */ 314 doshutdownhooks(); 315 316 /* Make sure IRQ's are disabled */ 317 IRQdisable; 318 319 if ((howto & (RB_HALT | RB_POWERDOWN)) == RB_HALT) { 320 printf("The operating system has halted.\n"); 321 printf("Please press any key to reboot.\n\n"); 322 cngetc(); 323 } 324 325 reset: 326 /* 327 * Make really really sure that all interrupts are disabled, 328 */ 329 (void) disable_interrupts(I32_bit | F32_bit); 330 331 if (howto & RB_POWERDOWN) { 332 uint32_t reg; 333 334 printf("powering down...\n\r"); 335 /* Delay to allow the UART's Tx FIFO to drain */ 336 delay(50000); 337 338 #define GPRD(r) *((volatile uint32_t *)(IXP425_GPIO_VBASE+(r))) 339 #define GPWR(r,v) *((volatile uint32_t *)(IXP425_GPIO_VBASE+(r))) = (v) 340 341 /* 342 * Power-down pin requires a short pulse 343 */ 344 reg = GPRD(IXP425_GPIO_GPOUTR); 345 reg |= 1u << GPIO_POWER_OFF; 346 GPWR(IXP425_GPIO_GPOUTR, reg); 347 348 delay(1000); 349 350 reg = GPRD(IXP425_GPIO_GPOUTR); 351 reg &= ~(1u << GPIO_POWER_OFF); 352 GPWR(IXP425_GPIO_GPOUTR, reg); 353 354 delay(500000); 355 printf("POWER OFF FAILED! TRYING TO REBOOT INSTEAD\n\r"); 356 } 357 358 printf("rebooting...\n\r"); 359 360 #define WDWR(r,v) *((volatile uint32_t *)(IXP425_OST_WDOG_VBASE+(r))) = (v) 361 /* Force a watchdog reset */ 362 WDWR(IXP425_OST_WDOG_KEY, OST_WDOG_KEY_MAJICK); 363 WDWR(IXP425_OST_WDOG_ENAB, OST_WDOG_ENAB_RST_ENA); 364 WDWR(IXP425_OST_WDOG, 0x1000); 365 WDWR(IXP425_OST_WDOG_ENAB, 366 OST_WDOG_ENAB_RST_ENA | OST_WDOG_ENAB_CNT_ENA); 367 368 delay(500000); 369 370 /* ...and if that didn't work, just croak. */ 371 printf("RESET FAILED!\n"); 372 373 for (;;); 374 } 375 376 /* Static device mappings. */ 377 static const struct pmap_devmap nslu2_devmap[] = { 378 /* Physical/Virtual address for I/O space */ 379 { 380 IXP425_IO_VBASE, 381 IXP425_IO_HWBASE, 382 IXP425_IO_SIZE, 383 VM_PROT_READ|VM_PROT_WRITE, 384 PTE_NOCACHE, 385 }, 386 387 /* Expansion Bus */ 388 { 389 IXP425_EXP_VBASE, 390 IXP425_EXP_HWBASE, 391 IXP425_EXP_SIZE, 392 VM_PROT_READ|VM_PROT_WRITE, 393 PTE_NOCACHE, 394 }, 395 396 /* IXP425 PCI Configuration */ 397 { 398 IXP425_PCI_VBASE, 399 IXP425_PCI_HWBASE, 400 IXP425_PCI_SIZE, 401 VM_PROT_READ|VM_PROT_WRITE, 402 PTE_NOCACHE, 403 }, 404 405 /* SDRAM Controller */ 406 { 407 IXP425_MCU_VBASE, 408 IXP425_MCU_HWBASE, 409 IXP425_MCU_SIZE, 410 VM_PROT_READ|VM_PROT_WRITE, 411 PTE_NOCACHE, 412 }, 413 414 /* PCI Memory Space */ 415 { 416 IXP425_PCI_MEM_VBASE, 417 IXP425_PCI_MEM_HWBASE, 418 IXP425_PCI_MEM_SIZE, 419 VM_PROT_READ|VM_PROT_WRITE, 420 PTE_NOCACHE, 421 }, 422 423 /* Flash memory */ 424 { 425 NSLU2_FLASH_VBASE, 426 NSLU2_FLASH_HWBASE, 427 NSLU2_FLASH_SIZE, 428 VM_PROT_READ|VM_PROT_WRITE, 429 PTE_NOCACHE, 430 }, 431 432 { 433 0, 434 0, 435 0, 436 0, 437 0, 438 } 439 }; 440 441 /* 442 * u_int initarm(...) 443 * 444 * Initial entry point on startup. This gets called before main() is 445 * entered. 446 * It should be responsible for setting up everything that must be 447 * in place when main is called. 448 * This includes 449 * Taking a copy of the boot configuration structure. 450 * Initialising the physical console so characters can be printed. 451 * Setting up page tables for the kernel 452 * Relocating the kernel to the bottom of physical memory 453 */ 454 u_int 455 initarm(void *arg) 456 { 457 extern vaddr_t xscale_cache_clean_addr; 458 #ifdef DIAGNOSTIC 459 extern vsize_t xscale_minidata_clean_size; 460 #endif 461 int loop; 462 int loop1; 463 u_int kerneldatasize; 464 u_int l1pagetable; 465 u_int freemempos; 466 uint32_t reg; 467 468 /* 469 * Make sure the power-down GPIO pin is configured correctly, as 470 * cpu_reboot() may be called early on (e.g. from within ddb(9)). 471 */ 472 /* Pin is active-high, so make sure it's driven low */ 473 reg = GPRD(IXP425_GPIO_GPOUTR); 474 reg &= ~(1u << GPIO_POWER_OFF); 475 GPWR(IXP425_GPIO_GPOUTR, reg); 476 477 /* Set as output */ 478 reg = GPRD(IXP425_GPIO_GPOER); 479 reg &= ~(1u << GPIO_POWER_OFF); 480 GPWR(IXP425_GPIO_GPOER, reg); 481 482 /* 483 * Since we map v0xf0000000 == p0xc8000000, it's possible for 484 * us to initialize the console now. 485 */ 486 consinit(); 487 488 #ifdef VERBOSE_INIT_ARM 489 /* Talk to the user */ 490 printf("\nNetBSD/evbarm (Linksys NSLU2) booting ...\n"); 491 #endif 492 493 /* 494 * Heads up ... Setup the CPU / MMU / TLB functions 495 */ 496 if (set_cpufuncs()) 497 panic("cpu not recognized!"); 498 499 /* XXX overwrite bootconfig to hardcoded values */ 500 bootconfig.dramblocks = 1; 501 bootconfig.dram[0].address = 0x10000000; 502 bootconfig.dram[0].pages = ixp425_sdram_size() / PAGE_SIZE; 503 504 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 505 506 #ifdef VERBOSE_INIT_ARM 507 printf("kernsize=0x%x\n", kerneldatasize); 508 #endif 509 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 510 511 /* 512 * Set up the variables that define the availablilty of 513 * physical memory. For now, we're going to set 514 * physical_freestart to 0x10200000 (where the kernel 515 * was loaded), and allocate the memory we need downwards. 516 * If we get too close to the L1 table that we set up, we 517 * will panic. We will update physical_freestart and 518 * physical_freeend later to reflect what pmap_bootstrap() 519 * wants to see. 520 * 521 * XXX pmap_bootstrap() needs an enema. 522 */ 523 physical_start = bootconfig.dram[0].address; 524 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 525 526 physical_freestart = physical_start 527 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 528 physical_freeend = physical_end; 529 530 physmem = (physical_end - physical_start) / PAGE_SIZE; 531 532 /* Tell the user about the memory */ 533 #ifdef VERBOSE_INIT_ARM 534 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 535 physical_start, physical_end - 1); 536 537 printf("Allocating page tables\n"); 538 #endif 539 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 540 541 freemempos = 0x10000000; 542 543 #ifdef VERBOSE_INIT_ARM 544 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 545 physical_start, physical_end); 546 #endif 547 548 /* Define a macro to simplify memory allocation */ 549 #define valloc_pages(var, np) \ 550 alloc_pages((var).pv_pa, (np)); \ 551 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 552 553 #if 0 554 #define alloc_pages(var, np) \ 555 physical_freeend -= ((np) * PAGE_SIZE); \ 556 if (physical_freeend < physical_freestart) \ 557 panic("initarm: out of memory"); \ 558 (var) = physical_freeend; \ 559 free_pages -= (np); \ 560 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 561 #else 562 #define alloc_pages(var, np) \ 563 (var) = freemempos; \ 564 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 565 freemempos += (np) * PAGE_SIZE; 566 #endif 567 568 loop1 = 0; 569 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 570 /* Are we 16KB aligned for an L1 ? */ 571 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 572 && kernel_l1pt.pv_pa == 0) { 573 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 574 } else { 575 valloc_pages(kernel_pt_table[loop1], 576 L2_TABLE_SIZE / PAGE_SIZE); 577 ++loop1; 578 } 579 } 580 581 /* This should never be able to happen but better confirm that. */ 582 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 583 panic("initarm: Failed to align the kernel page directory"); 584 585 /* 586 * Allocate a page for the system page. 587 * This page will just contain the system vectors and can be 588 * shared by all processes. 589 */ 590 alloc_pages(systempage.pv_pa, 1); 591 592 /* Allocate stacks for all modes */ 593 valloc_pages(irqstack, IRQ_STACK_SIZE); 594 valloc_pages(abtstack, ABT_STACK_SIZE); 595 valloc_pages(undstack, UND_STACK_SIZE); 596 valloc_pages(kernelstack, UPAGES); 597 598 /* Allocate enough pages for cleaning the Mini-Data cache. */ 599 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 600 valloc_pages(minidataclean, 1); 601 602 #ifdef VERBOSE_INIT_ARM 603 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 604 irqstack.pv_va); 605 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 606 abtstack.pv_va); 607 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 608 undstack.pv_va); 609 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 610 kernelstack.pv_va); 611 #endif 612 613 /* 614 * XXX Defer this to later so that we can reclaim the memory 615 * XXX used by the RedBoot page tables. 616 */ 617 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 618 619 /* 620 * Ok we have allocated physical pages for the primary kernel 621 * page tables 622 */ 623 624 #ifdef VERBOSE_INIT_ARM 625 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 626 #endif 627 628 /* 629 * Now we start construction of the L1 page table 630 * We start by mapping the L2 page tables into the L1. 631 * This means that we can replace L1 mappings later on if necessary 632 */ 633 l1pagetable = kernel_l1pt.pv_pa; 634 635 /* Map the L2 pages tables in the L1 page table */ 636 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 637 &kernel_pt_table[KERNEL_PT_SYS]); 638 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 639 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 640 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 641 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 642 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 643 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 644 645 /* update the top of the kernel VM */ 646 pmap_curmaxkvaddr = 647 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 648 649 pmap_link_l2pt(l1pagetable, IXP425_IO_VBASE, 650 &kernel_pt_table[KERNEL_PT_IO]); 651 652 #ifdef VERBOSE_INIT_ARM 653 printf("Mapping kernel\n"); 654 #endif 655 656 /* Now we fill in the L2 pagetable for the kernel static code/data */ 657 { 658 extern char etext[], _end[]; 659 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 660 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 661 u_int logical; 662 663 textsize = (textsize + PGOFSET) & ~PGOFSET; 664 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 665 666 logical = 0x00200000; /* offset of kernel in RAM */ 667 668 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 669 physical_start + logical, textsize, 670 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 671 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 672 physical_start + logical, totalsize - textsize, 673 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 674 } 675 676 #ifdef VERBOSE_INIT_ARM 677 printf("Constructing L2 page tables\n"); 678 #endif 679 680 /* Map the stack pages */ 681 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 682 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 683 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 684 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 685 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 686 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 687 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 688 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 689 690 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 691 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 692 693 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 694 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 695 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 696 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 697 } 698 699 /* Map the Mini-Data cache clean area. */ 700 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 701 minidataclean.pv_pa); 702 703 /* Map the vector page. */ 704 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 705 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 706 707 /* 708 * Map the IXP425 registers 709 */ 710 pmap_devmap_bootstrap(l1pagetable, nslu2_devmap); 711 712 /* 713 * Give the XScale global cache clean code an appropriately 714 * sized chunk of unmapped VA space starting at 0xff000000 715 * (our device mappings end before this address). 716 */ 717 xscale_cache_clean_addr = 0xff000000U; 718 719 /* 720 * Now we have the real page tables in place so we can switch to them. 721 * Once this is done we will be running with the REAL kernel page 722 * tables. 723 */ 724 725 /* 726 * Update the physical_freestart/physical_freeend/free_pages 727 * variables. 728 */ 729 { 730 extern char _end[]; 731 732 physical_freestart = physical_start + 733 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 734 KERNEL_BASE); 735 physical_freeend = physical_end; 736 free_pages = 737 (physical_freeend - physical_freestart) / PAGE_SIZE; 738 } 739 740 /* Switch tables */ 741 #ifdef VERBOSE_INIT_ARM 742 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 743 physical_freestart, free_pages, free_pages); 744 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 745 #endif 746 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 747 setttb(kernel_l1pt.pv_pa); 748 cpu_tlb_flushID(); 749 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 750 751 /* 752 * Moved from cpu_startup() as data_abort_handler() references 753 * this during uvm init 754 */ 755 proc0paddr = (struct user *)kernelstack.pv_va; 756 lwp0.l_addr = proc0paddr; 757 758 #ifdef VERBOSE_INIT_ARM 759 printf("bootstrap done.\n"); 760 #endif 761 762 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 763 764 /* 765 * Pages were allocated during the secondary bootstrap for the 766 * stacks for different CPU modes. 767 * We must now set the r13 registers in the different CPU modes to 768 * point to these stacks. 769 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 770 * of the stack memory. 771 */ 772 #ifdef VERBOSE_INIT_ARM 773 printf("init subsystems: stacks "); 774 #endif 775 776 set_stackptr(PSR_IRQ32_MODE, 777 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 778 set_stackptr(PSR_ABT32_MODE, 779 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 780 set_stackptr(PSR_UND32_MODE, 781 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 782 783 /* 784 * Well we should set a data abort handler. 785 * Once things get going this will change as we will need a proper 786 * handler. 787 * Until then we will use a handler that just panics but tells us 788 * why. 789 * Initialisation of the vectors will just panic on a data abort. 790 * This just fills in a slightly better one. 791 */ 792 #ifdef VERBOSE_INIT_ARM 793 printf("vectors "); 794 #endif 795 data_abort_handler_address = (u_int)data_abort_handler; 796 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 797 undefined_handler_address = (u_int)undefinedinstruction_bounce; 798 799 /* Initialise the undefined instruction handlers */ 800 #ifdef VERBOSE_INIT_ARM 801 printf("undefined "); 802 #endif 803 undefined_init(); 804 805 /* Load memory into UVM. */ 806 #ifdef VERBOSE_INIT_ARM 807 printf("page "); 808 #endif 809 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 810 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 811 atop(physical_freestart), atop(physical_freeend), 812 VM_FREELIST_DEFAULT); 813 814 /* Boot strap pmap telling it where the kernel page table is */ 815 #ifdef VERBOSE_INIT_ARM 816 printf("pmap "); 817 #endif 818 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 819 820 /* Setup the IRQ system */ 821 #ifdef VERBOSE_INIT_ARM 822 printf("irq "); 823 #endif 824 ixp425_intr_init(); 825 #ifdef VERBOSE_INIT_ARM 826 printf("\nAll initialize done!\nNow Starting NetBSD, Hear we go!\n"); 827 #endif 828 829 #ifdef BOOTHOWTO 830 boothowto = BOOTHOWTO; 831 #endif 832 833 #if NKSYMS || defined(DDB) || defined(LKM) 834 /* Firmware doesn't load symbols. */ 835 ksyms_init(0, NULL, NULL); 836 #endif 837 838 #ifdef DDB 839 db_machine_init(); 840 if (boothowto & RB_KDB) 841 Debugger(); 842 #endif 843 844 /* We return the new stack pointer address */ 845 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 846 } 847 848 /* 849 * consinit 850 */ 851 void 852 consinit(void) 853 { 854 static int consinit_called; 855 static const bus_addr_t addrs[2] = { 856 IXP425_UART0_HWBASE, IXP425_UART1_HWBASE 857 }; 858 859 if (consinit_called != 0) 860 return; 861 862 consinit_called = 1; 863 864 pmap_devmap_register(nslu2_devmap); 865 866 if (comcnattach(&ixp425_a4x_bs_tag, addrs[comcnunit], 867 comcnspeed, IXP425_UART_FREQ, COM_TYPE_PXA2x0, comcnmode)) 868 panic("can't init serial console (UART%d)", comcnunit); 869 } 870
Indexes created Sun Oct 19 22:09:57 GMT 2025