iq80310_machdep.c revision 1.68.28.1
1 /* $NetBSD: iq80310_machdep.c,v 1.68.28.1 2007/11/09 05:37:58 matt Exp $ */ 2 3 /* 4 * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * Copyright (c) 1997,1998 Mark Brinicombe. 40 * Copyright (c) 1997,1998 Causality Limited. 41 * All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by Mark Brinicombe 54 * for the NetBSD Project. 55 * 4. The name of the company nor the name of the author may be used to 56 * endorse or promote products derived from this software without specific 57 * prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 60 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 61 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 62 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 63 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 64 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 65 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 * 71 * Machine dependant functions for kernel setup for Intel IQ80310 evaluation 72 * boards using RedBoot firmware. 73 */ 74 75 #include <sys/cdefs.h> 76 __KERNEL_RCSID(0, "$NetBSD: iq80310_machdep.c,v 1.68.28.1 2007/11/09 05:37:58 matt Exp $"); 77 78 #include "opt_ddb.h" 79 #include "opt_pmap_debug.h" 80 81 #include <sys/param.h> 82 #include <sys/device.h> 83 #include <sys/systm.h> 84 #include <sys/kernel.h> 85 #include <sys/exec.h> 86 #include <sys/proc.h> 87 #include <sys/msgbuf.h> 88 #include <sys/reboot.h> 89 #include <sys/termios.h> 90 #include <sys/ksyms.h> 91 92 #include <uvm/uvm_extern.h> 93 94 #include <dev/cons.h> 95 96 #include <machine/db_machdep.h> 97 #include <ddb/db_sym.h> 98 #include <ddb/db_extern.h> 99 100 #include <machine/bootconfig.h> 101 #include <machine/bus.h> 102 #include <machine/cpu.h> 103 #include <machine/frame.h> 104 #include <arm/undefined.h> 105 106 #include <arm/arm32/machdep.h> 107 108 #include <arm/xscale/i80312reg.h> 109 #include <arm/xscale/i80312var.h> 110 111 #include <dev/pci/ppbreg.h> 112 113 #include <evbarm/iq80310/iq80310reg.h> 114 #include <evbarm/iq80310/iq80310var.h> 115 #include <evbarm/iq80310/obiovar.h> 116 117 #include "opt_ipkdb.h" 118 #include "ksyms.h" 119 120 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 121 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 122 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 123 124 /* 125 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 126 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 127 */ 128 #define KERNEL_VM_SIZE 0x0C000000 129 130 /* 131 * Address to call from cpu_reset() to reset the machine. 132 * This is machine architecture dependant as it varies depending 133 * on where the ROM appears when you turn the MMU off. 134 */ 135 136 u_int cpu_reset_address = 0; 137 138 /* Define various stack sizes in pages */ 139 #define IRQ_STACK_SIZE 1 140 #define ABT_STACK_SIZE 1 141 #ifdef IPKDB 142 #define UND_STACK_SIZE 2 143 #else 144 #define UND_STACK_SIZE 1 145 #endif 146 147 BootConfig bootconfig; /* Boot config storage */ 148 char *boot_args = NULL; 149 char *boot_file = NULL; 150 151 vm_offset_t physical_start; 152 vm_offset_t physical_freestart; 153 vm_offset_t physical_freeend; 154 vm_offset_t physical_end; 155 u_int free_pages; 156 vm_offset_t pagetables_start; 157 int physmem = 0; 158 159 /*int debug_flags;*/ 160 #ifndef PMAP_STATIC_L1S 161 int max_processes = 64; /* Default number */ 162 #endif /* !PMAP_STATIC_L1S */ 163 164 /* Physical and virtual addresses for some global pages */ 165 pv_addr_t irqstack; 166 pv_addr_t undstack; 167 pv_addr_t abtstack; 168 pv_addr_t kernelstack; 169 pv_addr_t minidataclean; 170 171 vm_offset_t msgbufphys; 172 173 extern u_int data_abort_handler_address; 174 extern u_int prefetch_abort_handler_address; 175 extern u_int undefined_handler_address; 176 177 #ifdef PMAP_DEBUG 178 extern int pmap_debug_level; 179 #endif 180 181 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 182 183 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 184 #define KERNEL_PT_KERNEL_NUM 4 185 186 /* L2 table for mapping i80312 */ 187 #define KERNEL_PT_IOPXS (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 188 189 /* L2 tables for mapping kernel VM */ 190 #define KERNEL_PT_VMDATA (KERNEL_PT_IOPXS + 1) 191 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 192 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 193 194 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 195 196 struct user *proc0paddr; 197 198 /* Prototypes */ 199 200 void consinit(void); 201 202 #include "com.h" 203 #if NCOM > 0 204 #include <dev/ic/comreg.h> 205 #include <dev/ic/comvar.h> 206 #endif 207 208 /* 209 * Define the default console speed for the board. This is generally 210 * what the firmware provided with the board defaults to. 211 */ 212 #ifndef CONSPEED 213 #define CONSPEED B115200 214 #endif /* ! CONSPEED */ 215 216 #ifndef CONUNIT 217 #define CONUNIT 0 218 #endif 219 220 #ifndef CONMODE 221 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 222 #endif 223 224 int comcnspeed = CONSPEED; 225 int comcnmode = CONMODE; 226 int comcnunit = CONUNIT; 227 228 /* 229 * void cpu_reboot(int howto, char *bootstr) 230 * 231 * Reboots the system 232 * 233 * Deal with any syncing, unmounting, dumping and shutdown hooks, 234 * then reset the CPU. 235 */ 236 void 237 cpu_reboot(int howto, char *bootstr) 238 { 239 240 /* 241 * If we are still cold then hit the air brakes 242 * and crash to earth fast 243 */ 244 if (cold) { 245 doshutdownhooks(); 246 printf("The operating system has halted.\n"); 247 printf("Please press any key to reboot.\n\n"); 248 cngetc(); 249 printf("rebooting...\n"); 250 cpu_reset(); 251 /*NOTREACHED*/ 252 } 253 254 /* Disable console buffering */ 255 256 /* 257 * If RB_NOSYNC was not specified sync the discs. 258 * Note: Unless cold is set to 1 here, syslogd will die during the 259 * unmount. It looks like syslogd is getting woken up only to find 260 * that it cannot page part of the binary in as the filesystem has 261 * been unmounted. 262 */ 263 if (!(howto & RB_NOSYNC)) 264 bootsync(); 265 266 /* Say NO to interrupts */ 267 splhigh(); 268 269 /* Do a dump if requested. */ 270 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 271 dumpsys(); 272 273 /* Run any shutdown hooks */ 274 doshutdownhooks(); 275 276 /* Make sure IRQ's are disabled */ 277 IRQdisable; 278 279 if (howto & RB_HALT) { 280 iq80310_7seg('.', '.'); 281 printf("The operating system has halted.\n"); 282 printf("Please press any key to reboot.\n\n"); 283 cngetc(); 284 } 285 286 printf("rebooting...\n"); 287 cpu_reset(); 288 /*NOTREACHED*/ 289 } 290 291 /* Static device mappings. */ 292 static const struct pmap_devmap iq80310_devmap[] = { 293 /* 294 * Map the on-board devices VA == PA so that we can access them 295 * with the MMU on or off. 296 */ 297 { 298 IQ80310_OBIO_BASE, 299 IQ80310_OBIO_BASE, 300 IQ80310_OBIO_SIZE, 301 VM_PROT_READ|VM_PROT_WRITE, 302 PTE_NOCACHE, 303 }, 304 { 305 IQ80310_PIOW_VBASE, 306 I80312_PCI_XLATE_PIOW_BASE, 307 I80312_PCI_XLATE_IOSIZE, 308 VM_PROT_READ|VM_PROT_WRITE, 309 PTE_NOCACHE, 310 }, 311 { 312 IQ80310_SIOW_VBASE, 313 I80312_PCI_XLATE_SIOW_BASE, 314 I80312_PCI_XLATE_IOSIZE, 315 VM_PROT_READ|VM_PROT_WRITE, 316 PTE_NOCACHE, 317 }, 318 { 319 IQ80310_80312_VBASE, 320 I80312_PMMR_BASE, 321 I80312_PMMR_SIZE, 322 VM_PROT_READ|VM_PROT_WRITE, 323 PTE_NOCACHE, 324 }, 325 326 { 327 0, 328 0, 329 0, 330 0, 331 0, 332 } 333 }; 334 335 /* 336 * u_int initarm(...) 337 * 338 * Initial entry point on startup. This gets called before main() is 339 * entered. 340 * It should be responsible for setting up everything that must be 341 * in place when main is called. 342 * This includes 343 * Taking a copy of the boot configuration structure. 344 * Initialising the physical console so characters can be printed. 345 * Setting up page tables for the kernel 346 * Relocating the kernel to the bottom of physical memory 347 */ 348 u_int 349 initarm(void *arg) 350 { 351 extern vaddr_t xscale_cache_clean_addr; 352 #ifdef DIAGNOSTIC 353 extern vsize_t xscale_minidata_clean_size; 354 #endif 355 int loop; 356 int loop1; 357 u_int l1pagetable; 358 paddr_t memstart; 359 psize_t memsize; 360 361 /* 362 * Clear out the 7-segment display. Whee, the first visual 363 * indication that we're running kernel code. 364 */ 365 iq80310_7seg(' ', ' '); 366 367 /* 368 * Heads up ... Setup the CPU / MMU / TLB functions 369 */ 370 if (set_cpufuncs()) 371 panic("CPU not recognized!"); 372 373 /* Calibrate the delay loop. */ 374 iq80310_calibrate_delay(); 375 376 /* 377 * Since we map the on-board devices VA==PA, and the kernel 378 * is running VA==PA, it's possible for us to initialize 379 * the console now. 380 */ 381 consinit(); 382 383 #ifdef VERBOSE_INIT_ARM 384 /* Talk to the user */ 385 printf("\nNetBSD/evbarm (IQ80310) booting ...\n"); 386 #endif 387 388 /* 389 * Reset the secondary PCI bus. RedBoot doesn't stop devices 390 * on the PCI bus before handing us control, so we have to 391 * do this. 392 * 393 * XXX This is arguably a bug in RedBoot, and doing this reset 394 * XXX could be problematic in the future if we encounter an 395 * XXX application where the PPB in the i80312 is used as a 396 * XXX PPB. 397 */ 398 { 399 uint32_t reg; 400 401 #ifdef VERBOSE_INIT_ARM 402 printf("Resetting secondary PCI bus...\n"); 403 #endif 404 reg = bus_space_read_4(&obio_bs_tag, 405 I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL); 406 bus_space_write_4(&obio_bs_tag, 407 I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL, 408 reg | PPB_BC_SECONDARY_RESET); 409 delay(10 * 1000); /* 10ms enough? */ 410 bus_space_write_4(&obio_bs_tag, 411 I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL, 412 reg); 413 } 414 415 /* 416 * We are currently running with the MMU enabled and the 417 * entire address space mapped VA==PA, except for the 418 * first 64M of RAM is also double-mapped at 0xc0000000. 419 * There is an L1 page table at 0xa0004000. 420 */ 421 422 /* 423 * Fetch the SDRAM start/size from the i80312 SDRAM configuration 424 * registers. 425 */ 426 i80312_sdram_bounds(&obio_bs_tag, I80312_PMMR_BASE + I80312_MEM_BASE, 427 &memstart, &memsize); 428 429 #ifdef VERBOSE_INIT_ARM 430 printf("initarm: Configuring system ...\n"); 431 #endif 432 433 /* Fake bootconfig structure for the benefit of pmap.c */ 434 /* XXX must make the memory description h/w independent */ 435 bootconfig.dramblocks = 1; 436 bootconfig.dram[0].address = memstart; 437 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 438 439 /* 440 * Set up the variables that define the availablilty of 441 * physical memory. For now, we're going to set 442 * physical_freestart to 0xa0200000 (where the kernel 443 * was loaded), and allocate the memory we need downwards. 444 * If we get too close to the L1 table that we set up, we 445 * will panic. We will update physical_freestart and 446 * physical_freeend later to reflect what pmap_bootstrap() 447 * wants to see. 448 * 449 * XXX pmap_bootstrap() needs an enema. 450 */ 451 physical_start = bootconfig.dram[0].address; 452 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 453 454 physical_freestart = 0xa0009000UL; 455 physical_freeend = 0xa0200000UL; 456 457 physmem = (physical_end - physical_start) / PAGE_SIZE; 458 459 #ifdef VERBOSE_INIT_ARM 460 /* Tell the user about the memory */ 461 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 462 physical_start, physical_end - 1); 463 #endif 464 465 /* 466 * Okay, the kernel starts 2MB in from the bottom of physical 467 * memory. We are going to allocate our bootstrap pages downwards 468 * from there. 469 * 470 * We need to allocate some fixed page tables to get the kernel 471 * going. We allocate one page directory and a number of page 472 * tables and store the physical addresses in the kernel_pt_table 473 * array. 474 * 475 * The kernel page directory must be on a 16K boundary. The page 476 * tables must be on 4K boundaries. What we do is allocate the 477 * page directory on the first 16K boundary that we encounter, and 478 * the page tables on 4K boundaries otherwise. Since we allocate 479 * at least 3 L2 page tables, we are guaranteed to encounter at 480 * least one 16K aligned region. 481 */ 482 483 #ifdef VERBOSE_INIT_ARM 484 printf("Allocating page tables\n"); 485 #endif 486 487 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 488 489 #ifdef VERBOSE_INIT_ARM 490 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 491 physical_freestart, free_pages, free_pages); 492 #endif 493 494 /* Define a macro to simplify memory allocation */ 495 #define valloc_pages(var, np) \ 496 alloc_pages((var).pv_pa, (np)); \ 497 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 498 499 #define alloc_pages(var, np) \ 500 physical_freeend -= ((np) * PAGE_SIZE); \ 501 if (physical_freeend < physical_freestart) \ 502 panic("initarm: out of memory"); \ 503 (var) = physical_freeend; \ 504 free_pages -= (np); \ 505 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 506 507 loop1 = 0; 508 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 509 /* Are we 16KB aligned for an L1 ? */ 510 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 511 && kernel_l1pt.pv_pa == 0) { 512 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 513 } else { 514 valloc_pages(kernel_pt_table[loop1], 515 L2_TABLE_SIZE / PAGE_SIZE); 516 ++loop1; 517 } 518 } 519 520 /* This should never be able to happen but better confirm that. */ 521 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 522 panic("initarm: Failed to align the kernel page directory"); 523 524 /* 525 * Allocate a page for the system page mapped to V0x00000000 526 * This page will just contain the system vectors and can be 527 * shared by all processes. 528 */ 529 alloc_pages(systempage.pv_pa, 1); 530 531 /* Allocate stacks for all modes */ 532 valloc_pages(irqstack, IRQ_STACK_SIZE); 533 valloc_pages(abtstack, ABT_STACK_SIZE); 534 valloc_pages(undstack, UND_STACK_SIZE); 535 valloc_pages(kernelstack, UPAGES); 536 537 /* Allocate enough pages for cleaning the Mini-Data cache. */ 538 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 539 valloc_pages(minidataclean, 1); 540 541 #ifdef VERBOSE_INIT_ARM 542 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 543 irqstack.pv_va); 544 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 545 abtstack.pv_va); 546 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 547 undstack.pv_va); 548 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 549 kernelstack.pv_va); 550 #endif 551 552 /* 553 * XXX Defer this to later so that we can reclaim the memory 554 * XXX used by the RedBoot page tables. 555 */ 556 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 557 558 /* 559 * Ok we have allocated physical pages for the primary kernel 560 * page tables 561 */ 562 563 #ifdef VERBOSE_INIT_ARM 564 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 565 #endif 566 567 /* 568 * Now we start construction of the L1 page table 569 * We start by mapping the L2 page tables into the L1. 570 * This means that we can replace L1 mappings later on if necessary 571 */ 572 l1pagetable = kernel_l1pt.pv_pa; 573 574 /* Map the L2 pages tables in the L1 page table */ 575 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 576 &kernel_pt_table[KERNEL_PT_SYS]); 577 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 578 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 579 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 580 pmap_link_l2pt(l1pagetable, IQ80310_IOPXS_VBASE, 581 &kernel_pt_table[KERNEL_PT_IOPXS]); 582 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 583 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 584 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 585 586 /* update the top of the kernel VM */ 587 pmap_curmaxkvaddr = 588 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 589 590 #ifdef VERBOSE_INIT_ARM 591 printf("Mapping kernel\n"); 592 #endif 593 594 /* Now we fill in the L2 pagetable for the kernel static code/data */ 595 { 596 extern char etext[], _end[]; 597 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 598 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 599 u_int logical; 600 601 textsize = (textsize + PGOFSET) & ~PGOFSET; 602 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 603 604 logical = 0x00200000; /* offset of kernel in RAM */ 605 606 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 607 physical_start + logical, textsize, 608 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 609 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 610 physical_start + logical, totalsize - textsize, 611 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 612 } 613 614 #ifdef VERBOSE_INIT_ARM 615 printf("Constructing L2 page tables\n"); 616 #endif 617 618 /* Map the stack pages */ 619 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 620 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 621 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 622 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 623 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 624 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 625 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 626 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 627 628 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 629 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 630 631 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 632 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 633 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 634 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 635 } 636 637 /* Map the Mini-Data cache clean area. */ 638 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 639 minidataclean.pv_pa); 640 641 /* Map the vector page. */ 642 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 643 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 644 645 /* Map the statically mapped devices. */ 646 pmap_devmap_bootstrap(l1pagetable, iq80310_devmap); 647 648 /* 649 * Give the XScale global cache clean code an appropriately 650 * sized chunk of unmapped VA space starting at 0xff000000 651 * (our device mappings end before this address). 652 */ 653 xscale_cache_clean_addr = 0xff000000U; 654 655 /* 656 * Now we have the real page tables in place so we can switch to them. 657 * Once this is done we will be running with the REAL kernel page 658 * tables. 659 */ 660 661 /* 662 * Update the physical_freestart/physical_freeend/free_pages 663 * variables. 664 */ 665 { 666 extern char _end[]; 667 668 physical_freestart = physical_start + 669 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 670 KERNEL_BASE); 671 physical_freeend = physical_end; 672 free_pages = 673 (physical_freeend - physical_freestart) / PAGE_SIZE; 674 } 675 676 /* Switch tables */ 677 #ifdef VERBOSE_INIT_ARM 678 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 679 physical_freestart, free_pages, free_pages); 680 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 681 #endif 682 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 683 setttb(kernel_l1pt.pv_pa); 684 cpu_tlb_flushID(); 685 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 686 687 /* 688 * Moved from cpu_startup() as data_abort_handler() references 689 * this during uvm init 690 */ 691 proc0paddr = (struct user *)kernelstack.pv_va; 692 lwp0.l_addr = proc0paddr; 693 694 #ifdef VERBOSE_INIT_ARM 695 printf("done!\n"); 696 #endif 697 698 #ifdef VERBOSE_INIT_ARM 699 printf("bootstrap done.\n"); 700 #endif 701 702 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 703 704 /* 705 * Pages were allocated during the secondary bootstrap for the 706 * stacks for different CPU modes. 707 * We must now set the r13 registers in the different CPU modes to 708 * point to these stacks. 709 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 710 * of the stack memory. 711 */ 712 #ifdef VERBOSE_INIT_ARM 713 printf("init subsystems: stacks "); 714 #endif 715 716 set_stackptr(PSR_IRQ32_MODE, 717 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 718 set_stackptr(PSR_ABT32_MODE, 719 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 720 set_stackptr(PSR_UND32_MODE, 721 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 722 723 /* 724 * Well we should set a data abort handler. 725 * Once things get going this will change as we will need a proper 726 * handler. 727 * Until then we will use a handler that just panics but tells us 728 * why. 729 * Initialisation of the vectors will just panic on a data abort. 730 * This just fills in a slightly better one. 731 */ 732 #ifdef VERBOSE_INIT_ARM 733 printf("vectors "); 734 #endif 735 data_abort_handler_address = (u_int)data_abort_handler; 736 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 737 undefined_handler_address = (u_int)undefinedinstruction_bounce; 738 739 /* Initialise the undefined instruction handlers */ 740 #ifdef VERBOSE_INIT_ARM 741 printf("undefined "); 742 #endif 743 undefined_init(); 744 745 /* Load memory into UVM. */ 746 #ifdef VERBOSE_INIT_ARM 747 printf("page "); 748 #endif 749 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 750 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 751 atop(physical_freestart), atop(physical_freeend), 752 VM_FREELIST_DEFAULT); 753 754 /* Boot strap pmap telling it where the kernel page table is */ 755 #ifdef VERBOSE_INIT_ARM 756 printf("pmap "); 757 #endif 758 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 759 760 /* Setup the IRQ system */ 761 #ifdef VERBOSE_INIT_ARM 762 printf("irq "); 763 #endif 764 iq80310_intr_init(); 765 766 #ifdef VERBOSE_INIT_ARM 767 printf("done.\n"); 768 #endif 769 770 #ifdef IPKDB 771 /* Initialise ipkdb */ 772 ipkdb_init(); 773 if (boothowto & RB_KDB) 774 ipkdb_connect(0); 775 #endif 776 777 #if NKSYMS || defined(DDB) || defined(LKM) 778 /* Firmware doesn't load symbols. */ 779 ksyms_init(0, NULL, NULL); 780 #endif 781 782 #ifdef DDB 783 db_machine_init(); 784 if (boothowto & RB_KDB) 785 Debugger(); 786 #endif 787 788 /* We return the new stack pointer address */ 789 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 790 } 791 792 void 793 consinit(void) 794 { 795 static const bus_addr_t comcnaddrs[] = { 796 IQ80310_UART2, /* com0 (J9) */ 797 IQ80310_UART1, /* com1 (J10) */ 798 }; 799 static int consinit_called; 800 801 if (consinit_called != 0) 802 return; 803 804 consinit_called = 1; 805 806 /* 807 * Console devices are mapped VA==PA. Our devmap reflects 808 * this, so register it now so drivers can map the console 809 * device. 810 */ 811 pmap_devmap_register(iq80310_devmap); 812 813 #if NCOM > 0 814 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 815 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 816 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 817 #else 818 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 819 #endif 820 } 821
Indexes created Wed Oct 29 12:09:47 GMT 2025