nslu2_machdep.c revision 1.27.16.3
1 /* $NetBSD: nslu2_machdep.c,v 1.27.16.3 2020/04/21 18:42:07 martin 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 1.27.16.3 2020/04/21 18:42:07 martin Exp $"); 98 99 #include "opt_arm_debug.h" 100 #include "opt_console.h" 101 #include "opt_ddb.h" 102 #include "opt_kgdb.h" 103 104 #include <sys/param.h> 105 #include <sys/device.h> 106 #include <sys/systm.h> 107 #include <sys/kernel.h> 108 #include <sys/exec.h> 109 #include <sys/proc.h> 110 #include <sys/msgbuf.h> 111 #include <sys/reboot.h> 112 #include <sys/termios.h> 113 #include <sys/ksyms.h> 114 #include <sys/bus.h> 115 #include <sys/cpu.h> 116 117 #include <uvm/uvm_extern.h> 118 119 #include <dev/cons.h> 120 121 #include <machine/db_machdep.h> 122 #include <ddb/db_sym.h> 123 #include <ddb/db_extern.h> 124 125 #include <machine/bootconfig.h> 126 #include <arm/locore.h> 127 #include <arm/undefined.h> 128 129 #include <arm/arm32/machdep.h> 130 131 #include <arm/xscale/ixp425reg.h> 132 #include <arm/xscale/ixp425var.h> 133 #include <arm/xscale/ixp425_sipvar.h> 134 135 #include <evbarm/nslu2/nslu2reg.h> 136 137 #include "com.h" 138 #if NCOM > 0 139 #include <dev/ic/comreg.h> 140 #include <dev/ic/comvar.h> 141 #endif 142 143 #include "ksyms.h" 144 145 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 146 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 147 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 148 149 /* 150 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 151 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 152 */ 153 #define KERNEL_VM_SIZE 0x0C000000 154 155 BootConfig bootconfig; /* Boot config storage */ 156 char *boot_args = NULL; 157 char *boot_file = NULL; 158 159 vaddr_t physical_start; 160 vaddr_t physical_freestart; 161 vaddr_t physical_freeend; 162 vaddr_t physical_end; 163 u_int free_pages; 164 165 /* Physical and virtual addresses for some global pages */ 166 pv_addr_t minidataclean; 167 168 paddr_t msgbufphys; 169 170 extern int end; 171 172 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 173 174 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 175 #define KERNEL_PT_KERNEL_NUM 4 176 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 177 /* L2 tables for mapping kernel VM */ 178 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1) 179 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 180 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 181 182 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 183 184 /* Prototypes */ 185 186 void consinit(void); 187 u_int cpu_get_control(void); 188 189 /* 190 * Define the default console speed for the board. This is generally 191 * what the firmware provided with the board defaults to. 192 */ 193 #ifndef CONSPEED 194 #define CONSPEED B115200 195 #endif /* ! CONSPEED */ 196 197 #ifndef CONUNIT 198 #define CONUNIT 0 199 #endif 200 201 #ifndef CONMODE 202 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */ 203 #endif 204 205 int comcnspeed = CONSPEED; 206 int comcnmode = CONMODE; 207 int comcnunit = CONUNIT; 208 209 #if KGDB 210 #ifndef KGDB_DEVNAME 211 #error Must define KGDB_DEVNAME 212 #endif 213 const char kgdb_devname[] = KGDB_DEVNAME; 214 215 #ifndef KGDB_DEVADDR 216 #error Must define KGDB_DEVADDR 217 #endif 218 unsigned long kgdb_devaddr = KGDB_DEVADDR; 219 220 #ifndef KGDB_DEVRATE 221 #define KGDB_DEVRATE CONSPEED 222 #endif 223 int kgdb_devrate = KGDB_DEVRATE; 224 225 #ifndef KGDB_DEVMODE 226 #define KGDB_DEVMODE CONMODE 227 #endif 228 int kgdb_devmode = KGDB_DEVMODE; 229 #endif /* KGDB */ 230 231 /* 232 * void cpu_reboot(int howto, char *bootstr) 233 * 234 * Reboots the system 235 * 236 * Deal with any syncing, unmounting, dumping and shutdown hooks, 237 * then reset the CPU. 238 */ 239 void 240 cpu_reboot(int howto, char *bootstr) 241 { 242 243 #ifdef DIAGNOSTIC 244 /* info */ 245 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 246 #endif 247 248 /* 249 * If we are still cold then hit the air brakes 250 * and crash to earth fast 251 */ 252 if (cold) { 253 doshutdownhooks(); 254 pmf_system_shutdown(boothowto); 255 printf("The operating system has halted.\n"); 256 printf("Please press any key to reboot.\n\n"); 257 cngetc(); 258 goto reset; 259 } 260 261 /* Disable console buffering */ 262 263 /* 264 * If RB_NOSYNC was not specified sync the discs. 265 * Note: Unless cold is set to 1 here, syslogd will die during the 266 * unmount. It looks like syslogd is getting woken up only to find 267 * that it cannot page part of the binary in as the filesystem has 268 * been unmounted. 269 */ 270 if (!(howto & RB_NOSYNC)) 271 bootsync(); 272 273 /* Say NO to interrupts */ 274 splhigh(); 275 276 /* Do a dump if requested. */ 277 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 278 dumpsys(); 279 280 /* Run any shutdown hooks */ 281 doshutdownhooks(); 282 283 pmf_system_shutdown(boothowto); 284 285 /* Make sure IRQ's are disabled */ 286 IRQdisable; 287 288 if ((howto & (RB_HALT | RB_POWERDOWN)) == RB_HALT) { 289 printf("The operating system has halted.\n"); 290 printf("Please press any key to reboot.\n\n"); 291 cngetc(); 292 } 293 294 reset: 295 /* 296 * Make really really sure that all interrupts are disabled, 297 */ 298 (void) disable_interrupts(I32_bit | F32_bit); 299 300 if (howto & RB_POWERDOWN) { 301 uint32_t reg; 302 303 printf("powering down...\n\r"); 304 /* Delay to allow the UART's Tx FIFO to drain */ 305 delay(50000); 306 307 #define GPRD(r) *((volatile uint32_t *)(IXP425_GPIO_VBASE+(r))) 308 #define GPWR(r,v) *((volatile uint32_t *)(IXP425_GPIO_VBASE+(r))) = (v) 309 310 /* 311 * Power-down pin requires a short pulse 312 */ 313 reg = GPRD(IXP425_GPIO_GPOUTR); 314 reg |= 1u << GPIO_POWER_OFF; 315 GPWR(IXP425_GPIO_GPOUTR, reg); 316 317 delay(1000); 318 319 reg = GPRD(IXP425_GPIO_GPOUTR); 320 reg &= ~(1u << GPIO_POWER_OFF); 321 GPWR(IXP425_GPIO_GPOUTR, reg); 322 323 delay(500000); 324 printf("POWER OFF FAILED! TRYING TO REBOOT INSTEAD\n\r"); 325 } 326 327 printf("rebooting...\n\r"); 328 329 #define WDWR(r,v) *((volatile uint32_t *)(IXP425_OST_WDOG_VBASE+(r))) = (v) 330 /* Force a watchdog reset */ 331 WDWR(IXP425_OST_WDOG_KEY, OST_WDOG_KEY_MAJICK); 332 WDWR(IXP425_OST_WDOG_ENAB, OST_WDOG_ENAB_RST_ENA); 333 WDWR(IXP425_OST_WDOG, 0x1000); 334 WDWR(IXP425_OST_WDOG_ENAB, 335 OST_WDOG_ENAB_RST_ENA | OST_WDOG_ENAB_CNT_ENA); 336 337 delay(500000); 338 339 /* ...and if that didn't work, just croak. */ 340 printf("RESET FAILED!\n"); 341 342 for (;;); 343 } 344 345 /* Static device mappings. */ 346 static const struct pmap_devmap nslu2_devmap[] = { 347 /* Physical/Virtual address for I/O space */ 348 { 349 IXP425_IO_VBASE, 350 IXP425_IO_HWBASE, 351 IXP425_IO_SIZE, 352 VM_PROT_READ|VM_PROT_WRITE, 353 PTE_NOCACHE, 354 }, 355 356 /* Expansion Bus */ 357 { 358 IXP425_EXP_VBASE, 359 IXP425_EXP_HWBASE, 360 IXP425_EXP_SIZE, 361 VM_PROT_READ|VM_PROT_WRITE, 362 PTE_NOCACHE, 363 }, 364 365 /* IXP425 PCI Configuration */ 366 { 367 IXP425_PCI_VBASE, 368 IXP425_PCI_HWBASE, 369 IXP425_PCI_SIZE, 370 VM_PROT_READ|VM_PROT_WRITE, 371 PTE_NOCACHE, 372 }, 373 374 /* SDRAM Controller */ 375 { 376 IXP425_MCU_VBASE, 377 IXP425_MCU_HWBASE, 378 IXP425_MCU_SIZE, 379 VM_PROT_READ|VM_PROT_WRITE, 380 PTE_NOCACHE, 381 }, 382 383 /* PCI Memory Space */ 384 { 385 IXP425_PCI_MEM_VBASE, 386 IXP425_PCI_MEM_HWBASE, 387 IXP425_PCI_MEM_SIZE, 388 VM_PROT_READ|VM_PROT_WRITE, 389 PTE_NOCACHE, 390 }, 391 392 /* Flash memory */ 393 { 394 NSLU2_FLASH_VBASE, 395 NSLU2_FLASH_HWBASE, 396 NSLU2_FLASH_SIZE, 397 VM_PROT_READ|VM_PROT_WRITE, 398 PTE_NOCACHE, 399 }, 400 401 { 402 0, 403 0, 404 0, 405 0, 406 0, 407 } 408 }; 409 410 /* 411 * vaddr_t initarm(...) 412 * 413 * Initial entry point on startup. This gets called before main() is 414 * entered. 415 * It should be responsible for setting up everything that must be 416 * in place when main is called. 417 * This includes 418 * Taking a copy of the boot configuration structure. 419 * Initialising the physical console so characters can be printed. 420 * Setting up page tables for the kernel 421 * Relocating the kernel to the bottom of physical memory 422 */ 423 vaddr_t 424 initarm(void *arg) 425 { 426 extern vaddr_t xscale_cache_clean_addr; 427 #ifdef DIAGNOSTIC 428 extern vsize_t xscale_minidata_clean_size; 429 #endif 430 int loop; 431 int loop1; 432 u_int kerneldatasize; 433 u_int l1pagetable; 434 u_int freemempos; 435 uint32_t reg; 436 437 /* 438 * Make sure the power-down GPIO pin is configured correctly, as 439 * cpu_reboot() may be called early on (e.g. from within ddb(9)). 440 */ 441 /* Pin is active-high, so make sure it's driven low */ 442 reg = GPRD(IXP425_GPIO_GPOUTR); 443 reg &= ~(1u << GPIO_POWER_OFF); 444 GPWR(IXP425_GPIO_GPOUTR, reg); 445 446 /* Set as output */ 447 reg = GPRD(IXP425_GPIO_GPOER); 448 reg &= ~(1u << GPIO_POWER_OFF); 449 GPWR(IXP425_GPIO_GPOER, reg); 450 451 /* 452 * Since we map v0xf0000000 == p0xc8000000, it's possible for 453 * us to initialize the console now. 454 */ 455 consinit(); 456 457 #ifdef VERBOSE_INIT_ARM 458 /* Talk to the user */ 459 printf("\nNetBSD/evbarm (Linksys NSLU2) booting ...\n"); 460 #endif 461 462 /* 463 * Heads up ... Setup the CPU / MMU / TLB functions 464 */ 465 if (set_cpufuncs()) 466 panic("cpu not recognized!"); 467 468 /* XXX overwrite bootconfig to hardcoded values */ 469 bootconfig.dramblocks = 1; 470 bootconfig.dram[0].address = 0x10000000; 471 bootconfig.dram[0].pages = ixp425_sdram_size() / PAGE_SIZE; 472 473 kerneldatasize = (uint32_t)&end - (uint32_t)KERNEL_TEXT_BASE; 474 475 #ifdef VERBOSE_INIT_ARM 476 printf("kernsize=0x%x\n", kerneldatasize); 477 #endif 478 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 479 480 /* 481 * Set up the variables that define the availablilty of 482 * physical memory. For now, we're going to set 483 * physical_freestart to 0x10200000 (where the kernel 484 * was loaded), and allocate the memory we need downwards. 485 * If we get too close to the L1 table that we set up, we 486 * will panic. We will update physical_freestart and 487 * physical_freeend later to reflect what pmap_bootstrap() 488 * wants to see. 489 * 490 * XXX pmap_bootstrap() needs an enema. 491 */ 492 physical_start = bootconfig.dram[0].address; 493 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 494 495 physical_freestart = physical_start 496 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 497 physical_freeend = physical_end; 498 499 physmem = (physical_end - physical_start) / PAGE_SIZE; 500 501 /* Tell the user about the memory */ 502 #ifdef VERBOSE_INIT_ARM 503 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 504 physical_start, physical_end - 1); 505 506 printf("Allocating page tables\n"); 507 #endif 508 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 509 510 freemempos = 0x10000000; 511 512 #ifdef VERBOSE_INIT_ARM 513 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 514 physical_start, physical_end); 515 #endif 516 517 /* Define a macro to simplify memory allocation */ 518 #define valloc_pages(var, np) \ 519 alloc_pages((var).pv_pa, (np)); \ 520 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 521 522 #if 0 523 #define alloc_pages(var, np) \ 524 physical_freeend -= ((np) * PAGE_SIZE); \ 525 if (physical_freeend < physical_freestart) \ 526 panic("initarm: out of memory"); \ 527 (var) = physical_freeend; \ 528 free_pages -= (np); \ 529 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 530 #else 531 #define alloc_pages(var, np) \ 532 (var) = freemempos; \ 533 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 534 freemempos += (np) * PAGE_SIZE; 535 #endif 536 537 loop1 = 0; 538 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 539 /* Are we 16KB aligned for an L1 ? */ 540 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 541 && kernel_l1pt.pv_pa == 0) { 542 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 543 } else { 544 valloc_pages(kernel_pt_table[loop1], 545 L2_TABLE_SIZE / PAGE_SIZE); 546 ++loop1; 547 } 548 } 549 550 /* This should never be able to happen but better confirm that. */ 551 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 552 panic("initarm: Failed to align the kernel page directory"); 553 554 /* 555 * Allocate a page for the system page. 556 * This page will just contain the system vectors and can be 557 * shared by all processes. 558 */ 559 alloc_pages(systempage.pv_pa, 1); 560 561 /* Allocate stacks for all modes */ 562 valloc_pages(irqstack, IRQ_STACK_SIZE); 563 valloc_pages(abtstack, ABT_STACK_SIZE); 564 valloc_pages(undstack, UND_STACK_SIZE); 565 valloc_pages(kernelstack, UPAGES); 566 567 /* Allocate enough pages for cleaning the Mini-Data cache. */ 568 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 569 valloc_pages(minidataclean, 1); 570 571 #ifdef VERBOSE_INIT_ARM 572 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 573 irqstack.pv_va); 574 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 575 abtstack.pv_va); 576 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 577 undstack.pv_va); 578 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 579 kernelstack.pv_va); 580 #endif 581 582 /* 583 * XXX Defer this to later so that we can reclaim the memory 584 * XXX used by the RedBoot page tables. 585 */ 586 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 587 588 /* 589 * Ok we have allocated physical pages for the primary kernel 590 * page tables 591 */ 592 593 #ifdef VERBOSE_INIT_ARM 594 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 595 #endif 596 597 /* 598 * Now we start construction of the L1 page table 599 * We start by mapping the L2 page tables into the L1. 600 * This means that we can replace L1 mappings later on if necessary 601 */ 602 l1pagetable = kernel_l1pt.pv_pa; 603 604 /* Map the L2 pages tables in the L1 page table */ 605 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 606 &kernel_pt_table[KERNEL_PT_SYS]); 607 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 608 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 609 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 610 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 611 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 612 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 613 614 /* update the top of the kernel VM */ 615 pmap_curmaxkvaddr = 616 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 617 618 pmap_link_l2pt(l1pagetable, IXP425_IO_VBASE, 619 &kernel_pt_table[KERNEL_PT_IO]); 620 621 #ifdef VERBOSE_INIT_ARM 622 printf("Mapping kernel\n"); 623 #endif 624 625 /* Now we fill in the L2 pagetable for the kernel static code/data */ 626 { 627 extern char etext[], _end[]; 628 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 629 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 630 u_int logical; 631 632 textsize = (textsize + PGOFSET) & ~PGOFSET; 633 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 634 635 logical = 0x00200000; /* offset of kernel in RAM */ 636 637 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 638 physical_start + logical, textsize, 639 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 640 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 641 physical_start + logical, totalsize - textsize, 642 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 643 } 644 645 #ifdef VERBOSE_INIT_ARM 646 printf("Constructing L2 page tables\n"); 647 #endif 648 649 /* Map the stack pages */ 650 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 651 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 652 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 653 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 654 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 655 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 656 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 657 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 658 659 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 660 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 661 662 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 663 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 664 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 665 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 666 } 667 668 /* Map the Mini-Data cache clean area. */ 669 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 670 minidataclean.pv_pa); 671 672 /* Map the vector page. */ 673 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 674 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 675 676 /* 677 * Map the IXP425 registers 678 */ 679 pmap_devmap_bootstrap(l1pagetable, nslu2_devmap); 680 681 /* 682 * Give the XScale global cache clean code an appropriately 683 * sized chunk of unmapped VA space starting at 0xff000000 684 * (our device mappings end before this address). 685 */ 686 xscale_cache_clean_addr = 0xff000000U; 687 688 /* 689 * Now we have the real page tables in place so we can switch to them. 690 * Once this is done we will be running with the REAL kernel page 691 * tables. 692 */ 693 694 /* 695 * Update the physical_freestart/physical_freeend/free_pages 696 * variables. 697 */ 698 { 699 extern char _end[]; 700 701 physical_freestart = physical_start + 702 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 703 KERNEL_BASE); 704 physical_freeend = physical_end; 705 free_pages = 706 (physical_freeend - physical_freestart) / PAGE_SIZE; 707 } 708 709 /* Switch tables */ 710 #ifdef VERBOSE_INIT_ARM 711 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 712 physical_freestart, free_pages, free_pages); 713 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 714 #endif 715 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 716 cpu_setttb(kernel_l1pt.pv_pa, true); 717 cpu_tlb_flushID(); 718 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 719 720 /* 721 * Moved from cpu_startup() as data_abort_handler() references 722 * this during uvm init 723 */ 724 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 725 726 #ifdef VERBOSE_INIT_ARM 727 printf("bootstrap done.\n"); 728 #endif 729 730 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 731 732 /* 733 * Pages were allocated during the secondary bootstrap for the 734 * stacks for different CPU modes. 735 * We must now set the r13 registers in the different CPU modes to 736 * point to these stacks. 737 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 738 * of the stack memory. 739 */ 740 #ifdef VERBOSE_INIT_ARM 741 printf("init subsystems: stacks "); 742 #endif 743 744 set_stackptr(PSR_IRQ32_MODE, 745 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 746 set_stackptr(PSR_ABT32_MODE, 747 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 748 set_stackptr(PSR_UND32_MODE, 749 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 750 751 /* 752 * Well we should set a data abort handler. 753 * Once things get going this will change as we will need a proper 754 * handler. 755 * Until then we will use a handler that just panics but tells us 756 * why. 757 * Initialisation of the vectors will just panic on a data abort. 758 * This just fills in a slightly better one. 759 */ 760 #ifdef VERBOSE_INIT_ARM 761 printf("vectors "); 762 #endif 763 data_abort_handler_address = (u_int)data_abort_handler; 764 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 765 undefined_handler_address = (u_int)undefinedinstruction_bounce; 766 767 /* Initialise the undefined instruction handlers */ 768 #ifdef VERBOSE_INIT_ARM 769 printf("undefined "); 770 #endif 771 undefined_init(); 772 773 /* Load memory into UVM. */ 774 #ifdef VERBOSE_INIT_ARM 775 printf("page "); 776 #endif 777 uvm_md_init(); 778 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 779 atop(physical_freestart), atop(physical_freeend), 780 VM_FREELIST_DEFAULT); 781 782 /* Boot strap pmap telling it where managed kernel virtual memory is */ 783 #ifdef VERBOSE_INIT_ARM 784 printf("pmap "); 785 #endif 786 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 787 788 /* Setup the IRQ system */ 789 #ifdef VERBOSE_INIT_ARM 790 printf("irq "); 791 #endif 792 ixp425_intr_init(); 793 #ifdef VERBOSE_INIT_ARM 794 printf("\nAll initialization done!\nNow Starting NetBSD, Here we go!\n"); 795 #endif 796 797 #ifdef BOOTHOWTO 798 boothowto = BOOTHOWTO; 799 #endif 800 801 #ifdef DDB 802 db_machine_init(); 803 if (boothowto & RB_KDB) 804 Debugger(); 805 #endif 806 807 /* We return the new stack pointer address */ 808 return kernelstack.pv_va + USPACE_SVC_STACK_TOP; 809 } 810 811 /* 812 * consinit 813 */ 814 void 815 consinit(void) 816 { 817 static int consinit_called; 818 static const bus_addr_t addrs[2] = { 819 IXP425_UART0_HWBASE, IXP425_UART1_HWBASE 820 }; 821 822 if (consinit_called != 0) 823 return; 824 825 consinit_called = 1; 826 827 pmap_devmap_register(nslu2_devmap); 828 829 if (comcnattach(&ixp425_a4x_bs_tag, addrs[comcnunit], 830 comcnspeed, IXP425_UART_FREQ, COM_TYPE_PXA2x0, comcnmode)) 831 panic("can't init serial console (UART%d)", comcnunit); 832 } 833
Indexes created Mon Oct 20 20:10:13 GMT 2025