nslu2_machdep.c revision 1.20
1 /* $NetBSD: nslu2_machdep.c,v 1.20 2012/07/29 00:07:09 matt Exp $ */ 2 3 /*- 4 * Copyright (c) 2006 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Steve C. Woodford. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 /* 32 * Copyright (c) 2003 33 * Ichiro FUKUHARA <ichiro (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 * 45 * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR 46 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 47 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 48 * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR 49 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 51 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 53 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 54 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 55 * SUCH DAMAGE. 56 */ 57 /* 58 * Copyright (c) 1997,1998 Mark Brinicombe. 59 * Copyright (c) 1997,1998 Causality Limited. 60 * All rights reserved. 61 * 62 * Redistribution and use in source and binary forms, with or without 63 * modification, are permitted provided that the following conditions 64 * are met: 65 * 1. Redistributions of source code must retain the above copyright 66 * notice, this list of conditions and the following disclaimer. 67 * 2. Redistributions in binary form must reproduce the above copyright 68 * notice, this list of conditions and the following disclaimer in the 69 * documentation and/or other materials provided with the distribution. 70 * 3. All advertising materials mentioning features or use of this software 71 * must display the following acknowledgement: 72 * This product includes software developed by Mark Brinicombe 73 * for the NetBSD Project. 74 * 4. The name of the company nor the name of the author may be used to 75 * endorse or promote products derived from this software without specific 76 * prior written permission. 77 * 78 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 79 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 80 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 81 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 82 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 83 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 84 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 85 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 86 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 87 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 88 * SUCH DAMAGE. 89 */ 90 91 /* 92 * Machine dependent functions for kernel setup for Linksys NSLU2 93 * using RedBoot firmware. 94 */ 95 96 #include <sys/cdefs.h> 97 __KERNEL_RCSID(0, "$NetBSD: nslu2_machdep.c,v 1.20 2012/07/29 00:07:09 matt Exp $"); 98 99 #include "opt_ddb.h" 100 #include "opt_kgdb.h" 101 #include "opt_pmap_debug.h" 102 103 #include <sys/param.h> 104 #include <sys/device.h> 105 #include <sys/systm.h> 106 #include <sys/kernel.h> 107 #include <sys/exec.h> 108 #include <sys/proc.h> 109 #include <sys/msgbuf.h> 110 #include <sys/reboot.h> 111 #include <sys/termios.h> 112 #include <sys/ksyms.h> 113 114 #include <uvm/uvm_extern.h> 115 116 #include <dev/cons.h> 117 118 #include <machine/db_machdep.h> 119 #include <ddb/db_sym.h> 120 #include <ddb/db_extern.h> 121 122 #include <machine/bootconfig.h> 123 #include <sys/bus.h> 124 #include <machine/cpu.h> 125 #include <machine/frame.h> 126 #include <arm/undefined.h> 127 128 #include <arm/arm32/machdep.h> 129 130 #include <arm/xscale/ixp425reg.h> 131 #include <arm/xscale/ixp425var.h> 132 #include <arm/xscale/ixp425_sipvar.h> 133 134 #include <evbarm/nslu2/nslu2reg.h> 135 136 #include "com.h" 137 #if NCOM > 0 138 #include <dev/ic/comreg.h> 139 #include <dev/ic/comvar.h> 140 #endif 141 142 #include "ksyms.h" 143 144 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 145 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 146 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 147 148 /* 149 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 150 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 151 */ 152 #define KERNEL_VM_SIZE 0x0C000000 153 154 155 /* 156 * Address to call from cpu_reset() to reset the machine. 157 * This is machine architecture dependent as it varies depending 158 * on where the ROM appears when you turn the MMU off. 159 */ 160 161 u_int cpu_reset_address = 0x00000000; 162 163 /* Define various stack sizes in pages */ 164 #define IRQ_STACK_SIZE 1 165 #define ABT_STACK_SIZE 1 166 #define UND_STACK_SIZE 1 167 168 BootConfig bootconfig; /* Boot config storage */ 169 char *boot_args = NULL; 170 char *boot_file = NULL; 171 172 vm_offset_t physical_start; 173 vm_offset_t physical_freestart; 174 vm_offset_t physical_freeend; 175 vm_offset_t physical_end; 176 u_int free_pages; 177 178 /* Physical and virtual addresses for some global pages */ 179 pv_addr_t minidataclean; 180 181 vm_offset_t msgbufphys; 182 183 extern int end; 184 185 #ifdef PMAP_DEBUG 186 extern int pmap_debug_level; 187 #endif 188 189 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 190 191 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 192 #define KERNEL_PT_KERNEL_NUM 4 193 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 194 /* L2 tables for mapping kernel VM */ 195 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1) 196 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 197 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 198 199 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 200 201 /* Prototypes */ 202 203 void consinit(void); 204 u_int cpu_get_control(void); 205 206 /* 207 * Define the default console speed for the board. This is generally 208 * what the firmware provided with the board defaults to. 209 */ 210 #ifndef CONSPEED 211 #define CONSPEED B115200 212 #endif /* ! CONSPEED */ 213 214 #ifndef CONUNIT 215 #define CONUNIT 0 216 #endif 217 218 #ifndef CONMODE 219 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */ 220 #endif 221 222 int comcnspeed = CONSPEED; 223 int comcnmode = CONMODE; 224 int comcnunit = CONUNIT; 225 226 #if KGDB 227 #ifndef KGDB_DEVNAME 228 #error Must define KGDB_DEVNAME 229 #endif 230 const char kgdb_devname[] = KGDB_DEVNAME; 231 232 #ifndef KGDB_DEVADDR 233 #error Must define KGDB_DEVADDR 234 #endif 235 unsigned long kgdb_devaddr = KGDB_DEVADDR; 236 237 #ifndef KGDB_DEVRATE 238 #define KGDB_DEVRATE CONSPEED 239 #endif 240 int kgdb_devrate = KGDB_DEVRATE; 241 242 #ifndef KGDB_DEVMODE 243 #define KGDB_DEVMODE CONMODE 244 #endif 245 int kgdb_devmode = KGDB_DEVMODE; 246 #endif /* KGDB */ 247 248 /* 249 * void cpu_reboot(int howto, char *bootstr) 250 * 251 * Reboots the system 252 * 253 * Deal with any syncing, unmounting, dumping and shutdown hooks, 254 * then reset the CPU. 255 */ 256 void 257 cpu_reboot(int howto, char *bootstr) 258 { 259 260 #ifdef DIAGNOSTIC 261 /* info */ 262 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 263 #endif 264 265 /* 266 * If we are still cold then hit the air brakes 267 * and crash to earth fast 268 */ 269 if (cold) { 270 doshutdownhooks(); 271 pmf_system_shutdown(boothowto); 272 printf("The operating system has halted.\n"); 273 printf("Please press any key to reboot.\n\n"); 274 cngetc(); 275 goto reset; 276 } 277 278 /* Disable console buffering */ 279 280 /* 281 * If RB_NOSYNC was not specified sync the discs. 282 * Note: Unless cold is set to 1 here, syslogd will die during the 283 * unmount. It looks like syslogd is getting woken up only to find 284 * that it cannot page part of the binary in as the filesystem has 285 * been unmounted. 286 */ 287 if (!(howto & RB_NOSYNC)) 288 bootsync(); 289 290 /* Say NO to interrupts */ 291 splhigh(); 292 293 /* Do a dump if requested. */ 294 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 295 dumpsys(); 296 297 /* Run any shutdown hooks */ 298 doshutdownhooks(); 299 300 pmf_system_shutdown(boothowto); 301 302 /* Make sure IRQ's are disabled */ 303 IRQdisable; 304 305 if ((howto & (RB_HALT | RB_POWERDOWN)) == RB_HALT) { 306 printf("The operating system has halted.\n"); 307 printf("Please press any key to reboot.\n\n"); 308 cngetc(); 309 } 310 311 reset: 312 /* 313 * Make really really sure that all interrupts are disabled, 314 */ 315 (void) disable_interrupts(I32_bit | F32_bit); 316 317 if (howto & RB_POWERDOWN) { 318 uint32_t reg; 319 320 printf("powering down...\n\r"); 321 /* Delay to allow the UART's Tx FIFO to drain */ 322 delay(50000); 323 324 #define GPRD(r) *((volatile uint32_t *)(IXP425_GPIO_VBASE+(r))) 325 #define GPWR(r,v) *((volatile uint32_t *)(IXP425_GPIO_VBASE+(r))) = (v) 326 327 /* 328 * Power-down pin requires a short pulse 329 */ 330 reg = GPRD(IXP425_GPIO_GPOUTR); 331 reg |= 1u << GPIO_POWER_OFF; 332 GPWR(IXP425_GPIO_GPOUTR, reg); 333 334 delay(1000); 335 336 reg = GPRD(IXP425_GPIO_GPOUTR); 337 reg &= ~(1u << GPIO_POWER_OFF); 338 GPWR(IXP425_GPIO_GPOUTR, reg); 339 340 delay(500000); 341 printf("POWER OFF FAILED! TRYING TO REBOOT INSTEAD\n\r"); 342 } 343 344 printf("rebooting...\n\r"); 345 346 #define WDWR(r,v) *((volatile uint32_t *)(IXP425_OST_WDOG_VBASE+(r))) = (v) 347 /* Force a watchdog reset */ 348 WDWR(IXP425_OST_WDOG_KEY, OST_WDOG_KEY_MAJICK); 349 WDWR(IXP425_OST_WDOG_ENAB, OST_WDOG_ENAB_RST_ENA); 350 WDWR(IXP425_OST_WDOG, 0x1000); 351 WDWR(IXP425_OST_WDOG_ENAB, 352 OST_WDOG_ENAB_RST_ENA | OST_WDOG_ENAB_CNT_ENA); 353 354 delay(500000); 355 356 /* ...and if that didn't work, just croak. */ 357 printf("RESET FAILED!\n"); 358 359 for (;;); 360 } 361 362 /* Static device mappings. */ 363 static const struct pmap_devmap nslu2_devmap[] = { 364 /* Physical/Virtual address for I/O space */ 365 { 366 IXP425_IO_VBASE, 367 IXP425_IO_HWBASE, 368 IXP425_IO_SIZE, 369 VM_PROT_READ|VM_PROT_WRITE, 370 PTE_NOCACHE, 371 }, 372 373 /* Expansion Bus */ 374 { 375 IXP425_EXP_VBASE, 376 IXP425_EXP_HWBASE, 377 IXP425_EXP_SIZE, 378 VM_PROT_READ|VM_PROT_WRITE, 379 PTE_NOCACHE, 380 }, 381 382 /* IXP425 PCI Configuration */ 383 { 384 IXP425_PCI_VBASE, 385 IXP425_PCI_HWBASE, 386 IXP425_PCI_SIZE, 387 VM_PROT_READ|VM_PROT_WRITE, 388 PTE_NOCACHE, 389 }, 390 391 /* SDRAM Controller */ 392 { 393 IXP425_MCU_VBASE, 394 IXP425_MCU_HWBASE, 395 IXP425_MCU_SIZE, 396 VM_PROT_READ|VM_PROT_WRITE, 397 PTE_NOCACHE, 398 }, 399 400 /* PCI Memory Space */ 401 { 402 IXP425_PCI_MEM_VBASE, 403 IXP425_PCI_MEM_HWBASE, 404 IXP425_PCI_MEM_SIZE, 405 VM_PROT_READ|VM_PROT_WRITE, 406 PTE_NOCACHE, 407 }, 408 409 /* Flash memory */ 410 { 411 NSLU2_FLASH_VBASE, 412 NSLU2_FLASH_HWBASE, 413 NSLU2_FLASH_SIZE, 414 VM_PROT_READ|VM_PROT_WRITE, 415 PTE_NOCACHE, 416 }, 417 418 { 419 0, 420 0, 421 0, 422 0, 423 0, 424 } 425 }; 426 427 /* 428 * u_int initarm(...) 429 * 430 * Initial entry point on startup. This gets called before main() is 431 * entered. 432 * It should be responsible for setting up everything that must be 433 * in place when main is called. 434 * This includes 435 * Taking a copy of the boot configuration structure. 436 * Initialising the physical console so characters can be printed. 437 * Setting up page tables for the kernel 438 * Relocating the kernel to the bottom of physical memory 439 */ 440 u_int 441 initarm(void *arg) 442 { 443 extern vaddr_t xscale_cache_clean_addr; 444 #ifdef DIAGNOSTIC 445 extern vsize_t xscale_minidata_clean_size; 446 #endif 447 int loop; 448 int loop1; 449 u_int kerneldatasize; 450 u_int l1pagetable; 451 u_int freemempos; 452 uint32_t reg; 453 454 /* 455 * Make sure the power-down GPIO pin is configured correctly, as 456 * cpu_reboot() may be called early on (e.g. from within ddb(9)). 457 */ 458 /* Pin is active-high, so make sure it's driven low */ 459 reg = GPRD(IXP425_GPIO_GPOUTR); 460 reg &= ~(1u << GPIO_POWER_OFF); 461 GPWR(IXP425_GPIO_GPOUTR, reg); 462 463 /* Set as output */ 464 reg = GPRD(IXP425_GPIO_GPOER); 465 reg &= ~(1u << GPIO_POWER_OFF); 466 GPWR(IXP425_GPIO_GPOER, reg); 467 468 /* 469 * Since we map v0xf0000000 == p0xc8000000, it's possible for 470 * us to initialize the console now. 471 */ 472 consinit(); 473 474 #ifdef VERBOSE_INIT_ARM 475 /* Talk to the user */ 476 printf("\nNetBSD/evbarm (Linksys NSLU2) booting ...\n"); 477 #endif 478 479 /* 480 * Heads up ... Setup the CPU / MMU / TLB functions 481 */ 482 if (set_cpufuncs()) 483 panic("cpu not recognized!"); 484 485 /* XXX overwrite bootconfig to hardcoded values */ 486 bootconfig.dramblocks = 1; 487 bootconfig.dram[0].address = 0x10000000; 488 bootconfig.dram[0].pages = ixp425_sdram_size() / PAGE_SIZE; 489 490 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 491 492 #ifdef VERBOSE_INIT_ARM 493 printf("kernsize=0x%x\n", kerneldatasize); 494 #endif 495 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 496 497 /* 498 * Set up the variables that define the availablilty of 499 * physical memory. For now, we're going to set 500 * physical_freestart to 0x10200000 (where the kernel 501 * was loaded), and allocate the memory we need downwards. 502 * If we get too close to the L1 table that we set up, we 503 * will panic. We will update physical_freestart and 504 * physical_freeend later to reflect what pmap_bootstrap() 505 * wants to see. 506 * 507 * XXX pmap_bootstrap() needs an enema. 508 */ 509 physical_start = bootconfig.dram[0].address; 510 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 511 512 physical_freestart = physical_start 513 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 514 physical_freeend = physical_end; 515 516 physmem = (physical_end - physical_start) / PAGE_SIZE; 517 518 /* Tell the user about the memory */ 519 #ifdef VERBOSE_INIT_ARM 520 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 521 physical_start, physical_end - 1); 522 523 printf("Allocating page tables\n"); 524 #endif 525 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 526 527 freemempos = 0x10000000; 528 529 #ifdef VERBOSE_INIT_ARM 530 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 531 physical_start, physical_end); 532 #endif 533 534 /* Define a macro to simplify memory allocation */ 535 #define valloc_pages(var, np) \ 536 alloc_pages((var).pv_pa, (np)); \ 537 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 538 539 #if 0 540 #define alloc_pages(var, np) \ 541 physical_freeend -= ((np) * PAGE_SIZE); \ 542 if (physical_freeend < physical_freestart) \ 543 panic("initarm: out of memory"); \ 544 (var) = physical_freeend; \ 545 free_pages -= (np); \ 546 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 547 #else 548 #define alloc_pages(var, np) \ 549 (var) = freemempos; \ 550 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 551 freemempos += (np) * PAGE_SIZE; 552 #endif 553 554 loop1 = 0; 555 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 556 /* Are we 16KB aligned for an L1 ? */ 557 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 558 && kernel_l1pt.pv_pa == 0) { 559 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 560 } else { 561 valloc_pages(kernel_pt_table[loop1], 562 L2_TABLE_SIZE / PAGE_SIZE); 563 ++loop1; 564 } 565 } 566 567 /* This should never be able to happen but better confirm that. */ 568 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 569 panic("initarm: Failed to align the kernel page directory"); 570 571 /* 572 * Allocate a page for the system page. 573 * This page will just contain the system vectors and can be 574 * shared by all processes. 575 */ 576 alloc_pages(systempage.pv_pa, 1); 577 578 /* Allocate stacks for all modes */ 579 valloc_pages(irqstack, IRQ_STACK_SIZE); 580 valloc_pages(abtstack, ABT_STACK_SIZE); 581 valloc_pages(undstack, UND_STACK_SIZE); 582 valloc_pages(kernelstack, UPAGES); 583 584 /* Allocate enough pages for cleaning the Mini-Data cache. */ 585 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 586 valloc_pages(minidataclean, 1); 587 588 #ifdef VERBOSE_INIT_ARM 589 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 590 irqstack.pv_va); 591 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 592 abtstack.pv_va); 593 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 594 undstack.pv_va); 595 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 596 kernelstack.pv_va); 597 #endif 598 599 /* 600 * XXX Defer this to later so that we can reclaim the memory 601 * XXX used by the RedBoot page tables. 602 */ 603 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 604 605 /* 606 * Ok we have allocated physical pages for the primary kernel 607 * page tables 608 */ 609 610 #ifdef VERBOSE_INIT_ARM 611 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 612 #endif 613 614 /* 615 * Now we start construction of the L1 page table 616 * We start by mapping the L2 page tables into the L1. 617 * This means that we can replace L1 mappings later on if necessary 618 */ 619 l1pagetable = kernel_l1pt.pv_pa; 620 621 /* Map the L2 pages tables in the L1 page table */ 622 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 623 &kernel_pt_table[KERNEL_PT_SYS]); 624 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 625 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 626 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 627 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 628 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 629 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 630 631 /* update the top of the kernel VM */ 632 pmap_curmaxkvaddr = 633 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 634 635 pmap_link_l2pt(l1pagetable, IXP425_IO_VBASE, 636 &kernel_pt_table[KERNEL_PT_IO]); 637 638 #ifdef VERBOSE_INIT_ARM 639 printf("Mapping kernel\n"); 640 #endif 641 642 /* Now we fill in the L2 pagetable for the kernel static code/data */ 643 { 644 extern char etext[], _end[]; 645 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 646 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 647 u_int logical; 648 649 textsize = (textsize + PGOFSET) & ~PGOFSET; 650 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 651 652 logical = 0x00200000; /* offset of kernel in RAM */ 653 654 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 655 physical_start + logical, textsize, 656 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 657 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 658 physical_start + logical, totalsize - textsize, 659 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 660 } 661 662 #ifdef VERBOSE_INIT_ARM 663 printf("Constructing L2 page tables\n"); 664 #endif 665 666 /* Map the stack pages */ 667 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 668 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 669 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 670 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 671 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 672 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 673 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 674 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 675 676 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 677 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 678 679 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 680 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 681 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 682 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 683 } 684 685 /* Map the Mini-Data cache clean area. */ 686 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 687 minidataclean.pv_pa); 688 689 /* Map the vector page. */ 690 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 691 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 692 693 /* 694 * Map the IXP425 registers 695 */ 696 pmap_devmap_bootstrap(l1pagetable, nslu2_devmap); 697 698 /* 699 * Give the XScale global cache clean code an appropriately 700 * sized chunk of unmapped VA space starting at 0xff000000 701 * (our device mappings end before this address). 702 */ 703 xscale_cache_clean_addr = 0xff000000U; 704 705 /* 706 * Now we have the real page tables in place so we can switch to them. 707 * Once this is done we will be running with the REAL kernel page 708 * tables. 709 */ 710 711 /* 712 * Update the physical_freestart/physical_freeend/free_pages 713 * variables. 714 */ 715 { 716 extern char _end[]; 717 718 physical_freestart = physical_start + 719 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 720 KERNEL_BASE); 721 physical_freeend = physical_end; 722 free_pages = 723 (physical_freeend - physical_freestart) / PAGE_SIZE; 724 } 725 726 /* Switch tables */ 727 #ifdef VERBOSE_INIT_ARM 728 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 729 physical_freestart, free_pages, free_pages); 730 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 731 #endif 732 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 733 cpu_setttb(kernel_l1pt.pv_pa); 734 cpu_tlb_flushID(); 735 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 736 737 /* 738 * Moved from cpu_startup() as data_abort_handler() references 739 * this during uvm init 740 */ 741 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 742 743 #ifdef VERBOSE_INIT_ARM 744 printf("bootstrap done.\n"); 745 #endif 746 747 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 748 749 /* 750 * Pages were allocated during the secondary bootstrap for the 751 * stacks for different CPU modes. 752 * We must now set the r13 registers in the different CPU modes to 753 * point to these stacks. 754 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 755 * of the stack memory. 756 */ 757 #ifdef VERBOSE_INIT_ARM 758 printf("init subsystems: stacks "); 759 #endif 760 761 set_stackptr(PSR_IRQ32_MODE, 762 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 763 set_stackptr(PSR_ABT32_MODE, 764 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 765 set_stackptr(PSR_UND32_MODE, 766 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 767 768 /* 769 * Well we should set a data abort handler. 770 * Once things get going this will change as we will need a proper 771 * handler. 772 * Until then we will use a handler that just panics but tells us 773 * why. 774 * Initialisation of the vectors will just panic on a data abort. 775 * This just fills in a slightly better one. 776 */ 777 #ifdef VERBOSE_INIT_ARM 778 printf("vectors "); 779 #endif 780 data_abort_handler_address = (u_int)data_abort_handler; 781 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 782 undefined_handler_address = (u_int)undefinedinstruction_bounce; 783 784 /* Initialise the undefined instruction handlers */ 785 #ifdef VERBOSE_INIT_ARM 786 printf("undefined "); 787 #endif 788 undefined_init(); 789 790 /* Load memory into UVM. */ 791 #ifdef VERBOSE_INIT_ARM 792 printf("page "); 793 #endif 794 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 795 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 796 atop(physical_freestart), atop(physical_freeend), 797 VM_FREELIST_DEFAULT); 798 799 /* Boot strap pmap telling it where the kernel page table is */ 800 #ifdef VERBOSE_INIT_ARM 801 printf("pmap "); 802 #endif 803 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 804 805 /* Setup the IRQ system */ 806 #ifdef VERBOSE_INIT_ARM 807 printf("irq "); 808 #endif 809 ixp425_intr_init(); 810 #ifdef VERBOSE_INIT_ARM 811 printf("\nAll initialize done!\nNow Starting NetBSD, Hear we go!\n"); 812 #endif 813 814 #ifdef BOOTHOWTO 815 boothowto = BOOTHOWTO; 816 #endif 817 818 #ifdef DDB 819 db_machine_init(); 820 if (boothowto & RB_KDB) 821 Debugger(); 822 #endif 823 824 /* We return the new stack pointer address */ 825 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 826 } 827 828 /* 829 * consinit 830 */ 831 void 832 consinit(void) 833 { 834 static int consinit_called; 835 static const bus_addr_t addrs[2] = { 836 IXP425_UART0_HWBASE, IXP425_UART1_HWBASE 837 }; 838 839 if (consinit_called != 0) 840 return; 841 842 consinit_called = 1; 843 844 pmap_devmap_register(nslu2_devmap); 845 846 if (comcnattach(&ixp425_a4x_bs_tag, addrs[comcnunit], 847 comcnspeed, IXP425_UART_FREQ, COM_TYPE_PXA2x0, comcnmode)) 848 panic("can't init serial console (UART%d)", comcnunit); 849 } 850
Indexes created Mon Oct 20 20:10:13 GMT 2025