1 /* $NetBSD: nslu2_machdep.c,v 1.41 2023/10/12 11:33:38 skrll 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 1.41 2023/10/12 11:33:38 skrll 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 DEVMAP_ENTRY( 349 IXP425_IO_VBASE, 350 IXP425_IO_HWBASE, 351 IXP425_IO_SIZE 352 ), 353 354 /* SDRAM Controller */ 355 DEVMAP_ENTRY( 356 IXP425_MCU_VBASE, 357 IXP425_MCU_HWBASE, 358 IXP425_MCU_SIZE 359 ), 360 361 /* 362 * No need to map the following entries statically. 363 * If you revive these, align VBASE's to L1 section 364 * boundaries (see pmap_devmap.c). 365 */ 366 #if 0 367 /* Expansion Bus */ 368 DEVMAP_ENTRY( 369 IXP425_EXP_VBASE, 370 IXP425_EXP_HWBASE, 371 IXP425_EXP_SIZE 372 ), 373 374 /* IXP425 PCI Configuration */ 375 DEVMAP_ENTRY( 376 IXP425_PCI_VBASE, 377 IXP425_PCI_HWBASE, 378 IXP425_PCI_SIZE 379 ), 380 381 /* PCI Memory Space */ 382 DEVMAP_ENTRY( 383 IXP425_PCI_MEM_VBASE, 384 IXP425_PCI_MEM_HWBASE, 385 IXP425_PCI_MEM_SIZE 386 ), 387 388 /* Flash memory */ 389 DEVMAP_ENTRY( 390 NSLU2_FLASH_VBASE, 391 NSLU2_FLASH_HWBASE, 392 NSLU2_FLASH_SIZE 393 ), 394 #endif 395 396 DEVMAP_ENTRY_END 397 }; 398 399 /* 400 * vaddr_t initarm(...) 401 * 402 * Initial entry point on startup. This gets called before main() is 403 * entered. 404 * It should be responsible for setting up everything that must be 405 * in place when main is called. 406 * This includes 407 * Taking a copy of the boot configuration structure. 408 * Initialising the physical console so characters can be printed. 409 * Setting up page tables for the kernel 410 * Relocating the kernel to the bottom of physical memory 411 */ 412 vaddr_t 413 initarm(void *arg) 414 { 415 int loop; 416 int loop1; 417 u_int kerneldatasize; 418 u_int l1pagetable; 419 u_int freemempos; 420 uint32_t reg; 421 422 /* 423 * Make sure the power-down GPIO pin is configured correctly, as 424 * cpu_reboot() may be called early on (e.g. from within ddb(9)). 425 */ 426 /* Pin is active-high, so make sure it's driven low */ 427 reg = GPRD(IXP425_GPIO_GPOUTR); 428 reg &= ~(1u << GPIO_POWER_OFF); 429 GPWR(IXP425_GPIO_GPOUTR, reg); 430 431 /* Set as output */ 432 reg = GPRD(IXP425_GPIO_GPOER); 433 reg &= ~(1u << GPIO_POWER_OFF); 434 GPWR(IXP425_GPIO_GPOER, reg); 435 436 /* 437 * Since we map v0xf0000000 == p0xc8000000, it's possible for 438 * us to initialize the console now. 439 */ 440 consinit(); 441 442 #ifdef VERBOSE_INIT_ARM 443 /* Talk to the user */ 444 printf("\nNetBSD/evbarm (Linksys NSLU2) booting ...\n"); 445 #endif 446 447 /* 448 * Heads up ... Setup the CPU / MMU / TLB functions 449 */ 450 if (set_cpufuncs()) 451 panic("cpu not recognized!"); 452 453 /* XXX overwrite bootconfig to hardcoded values */ 454 bootconfig.dramblocks = 1; 455 bootconfig.dram[0].address = 0x10000000; 456 bootconfig.dram[0].pages = ixp425_sdram_size() / PAGE_SIZE; 457 458 kerneldatasize = (uint32_t)&end - (uint32_t)KERNEL_TEXT_BASE; 459 460 #ifdef VERBOSE_INIT_ARM 461 printf("kernsize=0x%x\n", kerneldatasize); 462 #endif 463 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 464 465 /* 466 * Set up the variables that define the availability of 467 * physical memory. For now, we're going to set 468 * physical_freestart to 0x10200000 (where the kernel 469 * was loaded), and allocate the memory we need downwards. 470 * If we get too close to the L1 table that we set up, we 471 * will panic. We will update physical_freestart and 472 * physical_freeend later to reflect what pmap_bootstrap() 473 * wants to see. 474 * 475 * XXX pmap_bootstrap() needs an enema. 476 */ 477 physical_start = bootconfig.dram[0].address; 478 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 479 480 physical_freestart = physical_start 481 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 482 physical_freeend = physical_end; 483 484 physmem = (physical_end - physical_start) / PAGE_SIZE; 485 486 /* Tell the user about the memory */ 487 #ifdef VERBOSE_INIT_ARM 488 printf("physmemory: %" PRIuPSIZE " pages at " 489 "0x%08" PRIxPADDR " -> 0x%08" PRIxPADDR "\n", 490 physmem, physical_start, physical_end - 1); 491 492 printf("Allocating page tables\n"); 493 #endif 494 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 495 496 freemempos = 0x10000000; 497 498 #ifdef VERBOSE_INIT_ARM 499 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 500 physical_start, physical_end); 501 #endif 502 503 /* Define a macro to simplify memory allocation */ 504 #define valloc_pages(var, np) \ 505 alloc_pages((var).pv_pa, (np)); \ 506 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 507 508 #if 0 509 #define alloc_pages(var, np) \ 510 physical_freeend -= ((np) * PAGE_SIZE); \ 511 if (physical_freeend < physical_freestart) \ 512 panic("initarm: out of memory"); \ 513 (var) = physical_freeend; \ 514 free_pages -= (np); \ 515 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 516 #else 517 #define alloc_pages(var, np) \ 518 (var) = freemempos; \ 519 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 520 freemempos += (np) * PAGE_SIZE; 521 #endif 522 523 loop1 = 0; 524 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 525 /* Are we 16KB aligned for an L1 ? */ 526 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 527 && kernel_l1pt.pv_pa == 0) { 528 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 529 } else { 530 valloc_pages(kernel_pt_table[loop1], 531 L2_TABLE_SIZE / PAGE_SIZE); 532 ++loop1; 533 } 534 } 535 536 /* This should never be able to happen but better confirm that. */ 537 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 538 panic("initarm: Failed to align the kernel page directory"); 539 540 /* 541 * Allocate a page for the system page. 542 * This page will just contain the system vectors and can be 543 * shared by all processes. 544 */ 545 alloc_pages(systempage.pv_pa, 1); 546 547 /* Allocate stacks for all modes */ 548 valloc_pages(irqstack, IRQ_STACK_SIZE); 549 valloc_pages(abtstack, ABT_STACK_SIZE); 550 valloc_pages(undstack, UND_STACK_SIZE); 551 valloc_pages(kernelstack, UPAGES); 552 553 /* Allocate enough pages for cleaning the Mini-Data cache. */ 554 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 555 valloc_pages(minidataclean, 1); 556 557 #ifdef VERBOSE_INIT_ARM 558 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 559 irqstack.pv_va); 560 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 561 abtstack.pv_va); 562 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 563 undstack.pv_va); 564 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 565 kernelstack.pv_va); 566 #endif 567 568 /* 569 * XXX Defer this to later so that we can reclaim the memory 570 * XXX used by the RedBoot page tables. 571 */ 572 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 573 574 /* 575 * Ok we have allocated physical pages for the primary kernel 576 * page tables 577 */ 578 579 #ifdef VERBOSE_INIT_ARM 580 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 581 #endif 582 583 /* 584 * Now we start construction of the L1 page table 585 * We start by mapping the L2 page tables into the L1. 586 * This means that we can replace L1 mappings later on if necessary 587 */ 588 l1pagetable = kernel_l1pt.pv_pa; 589 590 /* Map the L2 pages tables in the L1 page table */ 591 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 592 &kernel_pt_table[KERNEL_PT_SYS]); 593 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 594 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 595 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 596 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 597 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 598 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 599 600 /* update the top of the kernel VM */ 601 pmap_curmaxkvaddr = 602 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 603 604 pmap_link_l2pt(l1pagetable, IXP425_IO_VBASE, 605 &kernel_pt_table[KERNEL_PT_IO]); 606 607 #ifdef VERBOSE_INIT_ARM 608 printf("Mapping kernel\n"); 609 #endif 610 611 /* Now we fill in the L2 pagetable for the kernel static code/data */ 612 { 613 extern char etext[], _end[]; 614 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 615 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 616 u_int logical; 617 618 textsize = (textsize + PGOFSET) & ~PGOFSET; 619 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 620 621 logical = 0x00200000; /* offset of kernel in RAM */ 622 623 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 624 physical_start + logical, textsize, 625 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 626 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 627 physical_start + logical, totalsize - textsize, 628 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 629 630 if (KERNEL_BASE + logical >= KERNEL_VM_BASE) 631 panic("VA for kernel image exhausted."); 632 } 633 634 #ifdef VERBOSE_INIT_ARM 635 printf("Constructing L2 page tables\n"); 636 #endif 637 638 /* Map the stack pages */ 639 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 640 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 641 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 642 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 643 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 644 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 645 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 646 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 647 648 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 649 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 650 651 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 652 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 653 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 654 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 655 } 656 657 /* Map the Mini-Data cache clean area. */ 658 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 659 minidataclean.pv_pa); 660 661 /* Map the vector page. */ 662 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 663 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 664 665 /* 666 * Map the IXP425 registers 667 */ 668 pmap_devmap_bootstrap(l1pagetable, nslu2_devmap); 669 670 /* 671 * Give the XScale global cache clean code an appropriately 672 * sized chunk of unmapped VA space starting at 0xff000000 673 * (our device mappings end before this address). 674 */ 675 xscale_cache_clean_addr = 0xff000000U; 676 677 /* 678 * Now we have the real page tables in place so we can switch to them. 679 * Once this is done we will be running with the REAL kernel page 680 * tables. 681 */ 682 683 /* 684 * Update the physical_freestart/physical_freeend/free_pages 685 * variables. 686 */ 687 { 688 extern char _end[]; 689 690 physical_freestart = physical_start + 691 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 692 KERNEL_BASE); 693 physical_freeend = physical_end; 694 free_pages = 695 (physical_freeend - physical_freestart) / PAGE_SIZE; 696 } 697 698 /* Switch tables */ 699 #ifdef VERBOSE_INIT_ARM 700 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 701 physical_freestart, free_pages, free_pages); 702 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 703 #endif 704 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 705 cpu_setttb(kernel_l1pt.pv_pa, true); 706 cpu_tlb_flushID(); 707 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 708 709 /* 710 * Moved from cpu_startup() as data_abort_handler() references 711 * this during uvm init 712 */ 713 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 714 715 #ifdef VERBOSE_INIT_ARM 716 printf("bootstrap done.\n"); 717 #endif 718 719 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 720 721 /* 722 * Pages were allocated during the secondary bootstrap for the 723 * stacks for different CPU modes. 724 * We must now set the r13 registers in the different CPU modes to 725 * point to these stacks. 726 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 727 * of the stack memory. 728 */ 729 #ifdef VERBOSE_INIT_ARM 730 printf("init subsystems: stacks "); 731 #endif 732 733 set_stackptr(PSR_IRQ32_MODE, 734 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 735 set_stackptr(PSR_ABT32_MODE, 736 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 737 set_stackptr(PSR_UND32_MODE, 738 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 739 740 /* 741 * Well we should set a data abort handler. 742 * Once things get going this will change as we will need a proper 743 * handler. 744 * Until then we will use a handler that just panics but tells us 745 * why. 746 * Initialisation of the vectors will just panic on a data abort. 747 * This just fills in a slightly better one. 748 */ 749 #ifdef VERBOSE_INIT_ARM 750 printf("vectors "); 751 #endif 752 data_abort_handler_address = (u_int)data_abort_handler; 753 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 754 undefined_handler_address = (u_int)undefinedinstruction_bounce; 755 756 /* Initialise the undefined instruction handlers */ 757 #ifdef VERBOSE_INIT_ARM 758 printf("undefined "); 759 #endif 760 undefined_init(); 761 762 /* Load memory into UVM. */ 763 #ifdef VERBOSE_INIT_ARM 764 printf("page "); 765 #endif 766 uvm_md_init(); 767 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 768 atop(physical_freestart), atop(physical_freeend), 769 VM_FREELIST_DEFAULT); 770 771 /* Boot strap pmap telling it where managed kernel virtual memory is */ 772 #ifdef VERBOSE_INIT_ARM 773 printf("pmap "); 774 #endif 775 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 776 777 /* Setup the IRQ system */ 778 #ifdef VERBOSE_INIT_ARM 779 printf("irq "); 780 #endif 781 ixp425_intr_init(); 782 #ifdef VERBOSE_INIT_ARM 783 printf("\nAll initialization done!\nNow Starting NetBSD, Here we go!\n"); 784 #endif 785 786 #ifdef BOOTHOWTO 787 boothowto = BOOTHOWTO; 788 #endif 789 790 #ifdef DDB 791 db_machine_init(); 792 if (boothowto & RB_KDB) 793 Debugger(); 794 #endif 795 796 /* We return the new stack pointer address */ 797 return kernelstack.pv_va + USPACE_SVC_STACK_TOP; 798 } 799 800 /* 801 * consinit 802 */ 803 void 804 consinit(void) 805 { 806 static int consinit_called; 807 static const bus_addr_t addrs[2] = { 808 IXP425_UART0_HWBASE, IXP425_UART1_HWBASE 809 }; 810 811 if (consinit_called != 0) 812 return; 813 814 consinit_called = 1; 815 816 pmap_devmap_register(nslu2_devmap); 817 818 if (comcnattach(&ixp425_a4x_bs_tag, addrs[comcnunit], 819 comcnspeed, IXP425_UART_FREQ, COM_TYPE_PXA2x0, comcnmode)) 820 panic("can't init serial console (UART%d)", comcnunit); 821 } 822
Indexes created Thu Oct 02 07:10:07 GMT 2025