iq80310_machdep.c revision 1.71
1 /* $NetBSD: iq80310_machdep.c,v 1.71 2008/11/11 06:46:41 dyoung 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 1.71 2008/11/11 06:46:41 dyoung 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 "ksyms.h" 118 119 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 120 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 121 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 122 123 /* 124 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 125 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 126 */ 127 #define KERNEL_VM_SIZE 0x0C000000 128 129 /* 130 * Address to call from cpu_reset() to reset the machine. 131 * This is machine architecture dependant as it varies depending 132 * on where the ROM appears when you turn the MMU off. 133 */ 134 135 u_int cpu_reset_address = 0; 136 137 /* Define various stack sizes in pages */ 138 #define IRQ_STACK_SIZE 1 139 #define ABT_STACK_SIZE 1 140 #define UND_STACK_SIZE 1 141 142 BootConfig bootconfig; /* Boot config storage */ 143 char *boot_args = NULL; 144 char *boot_file = NULL; 145 146 vm_offset_t physical_start; 147 vm_offset_t physical_freestart; 148 vm_offset_t physical_freeend; 149 vm_offset_t physical_end; 150 u_int free_pages; 151 vm_offset_t pagetables_start; 152 int physmem = 0; 153 154 /*int debug_flags;*/ 155 #ifndef PMAP_STATIC_L1S 156 int max_processes = 64; /* Default number */ 157 #endif /* !PMAP_STATIC_L1S */ 158 159 /* Physical and virtual addresses for some global pages */ 160 pv_addr_t irqstack; 161 pv_addr_t undstack; 162 pv_addr_t abtstack; 163 pv_addr_t kernelstack; 164 pv_addr_t minidataclean; 165 166 vm_offset_t msgbufphys; 167 168 extern u_int data_abort_handler_address; 169 extern u_int prefetch_abort_handler_address; 170 extern u_int undefined_handler_address; 171 172 #ifdef PMAP_DEBUG 173 extern int pmap_debug_level; 174 #endif 175 176 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 177 178 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 179 #define KERNEL_PT_KERNEL_NUM 4 180 181 /* L2 table for mapping i80312 */ 182 #define KERNEL_PT_IOPXS (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 183 184 /* L2 tables for mapping kernel VM */ 185 #define KERNEL_PT_VMDATA (KERNEL_PT_IOPXS + 1) 186 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 187 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 188 189 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 190 191 struct user *proc0paddr; 192 193 /* Prototypes */ 194 195 void consinit(void); 196 197 #include "com.h" 198 #if NCOM > 0 199 #include <dev/ic/comreg.h> 200 #include <dev/ic/comvar.h> 201 #endif 202 203 /* 204 * Define the default console speed for the board. This is generally 205 * what the firmware provided with the board defaults to. 206 */ 207 #ifndef CONSPEED 208 #define CONSPEED B115200 209 #endif /* ! CONSPEED */ 210 211 #ifndef CONUNIT 212 #define CONUNIT 0 213 #endif 214 215 #ifndef CONMODE 216 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 217 #endif 218 219 int comcnspeed = CONSPEED; 220 int comcnmode = CONMODE; 221 int comcnunit = CONUNIT; 222 223 /* 224 * void cpu_reboot(int howto, char *bootstr) 225 * 226 * Reboots the system 227 * 228 * Deal with any syncing, unmounting, dumping and shutdown hooks, 229 * then reset the CPU. 230 */ 231 void 232 cpu_reboot(int howto, char *bootstr) 233 { 234 235 /* 236 * If we are still cold then hit the air brakes 237 * and crash to earth fast 238 */ 239 if (cold) { 240 doshutdownhooks(); 241 pmf_system_shutdown(boothowto); 242 printf("The operating system has halted.\n"); 243 printf("Please press any key to reboot.\n\n"); 244 cngetc(); 245 printf("rebooting...\n"); 246 cpu_reset(); 247 /*NOTREACHED*/ 248 } 249 250 /* Disable console buffering */ 251 252 /* 253 * If RB_NOSYNC was not specified sync the discs. 254 * Note: Unless cold is set to 1 here, syslogd will die during the 255 * unmount. It looks like syslogd is getting woken up only to find 256 * that it cannot page part of the binary in as the filesystem has 257 * been unmounted. 258 */ 259 if (!(howto & RB_NOSYNC)) 260 bootsync(); 261 262 /* Say NO to interrupts */ 263 splhigh(); 264 265 /* Do a dump if requested. */ 266 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 267 dumpsys(); 268 269 /* Run any shutdown hooks */ 270 doshutdownhooks(); 271 272 pmf_system_shutdown(boothowto); 273 274 /* Make sure IRQ's are disabled */ 275 IRQdisable; 276 277 if (howto & RB_HALT) { 278 iq80310_7seg('.', '.'); 279 printf("The operating system has halted.\n"); 280 printf("Please press any key to reboot.\n\n"); 281 cngetc(); 282 } 283 284 printf("rebooting...\n"); 285 cpu_reset(); 286 /*NOTREACHED*/ 287 } 288 289 /* Static device mappings. */ 290 static const struct pmap_devmap iq80310_devmap[] = { 291 /* 292 * Map the on-board devices VA == PA so that we can access them 293 * with the MMU on or off. 294 */ 295 { 296 IQ80310_OBIO_BASE, 297 IQ80310_OBIO_BASE, 298 IQ80310_OBIO_SIZE, 299 VM_PROT_READ|VM_PROT_WRITE, 300 PTE_NOCACHE, 301 }, 302 { 303 IQ80310_PIOW_VBASE, 304 I80312_PCI_XLATE_PIOW_BASE, 305 I80312_PCI_XLATE_IOSIZE, 306 VM_PROT_READ|VM_PROT_WRITE, 307 PTE_NOCACHE, 308 }, 309 { 310 IQ80310_SIOW_VBASE, 311 I80312_PCI_XLATE_SIOW_BASE, 312 I80312_PCI_XLATE_IOSIZE, 313 VM_PROT_READ|VM_PROT_WRITE, 314 PTE_NOCACHE, 315 }, 316 { 317 IQ80310_80312_VBASE, 318 I80312_PMMR_BASE, 319 I80312_PMMR_SIZE, 320 VM_PROT_READ|VM_PROT_WRITE, 321 PTE_NOCACHE, 322 }, 323 324 { 325 0, 326 0, 327 0, 328 0, 329 0, 330 } 331 }; 332 333 /* 334 * u_int initarm(...) 335 * 336 * Initial entry point on startup. This gets called before main() is 337 * entered. 338 * It should be responsible for setting up everything that must be 339 * in place when main is called. 340 * This includes 341 * Taking a copy of the boot configuration structure. 342 * Initialising the physical console so characters can be printed. 343 * Setting up page tables for the kernel 344 * Relocating the kernel to the bottom of physical memory 345 */ 346 u_int 347 initarm(void *arg) 348 { 349 extern vaddr_t xscale_cache_clean_addr; 350 #ifdef DIAGNOSTIC 351 extern vsize_t xscale_minidata_clean_size; 352 #endif 353 int loop; 354 int loop1; 355 u_int l1pagetable; 356 paddr_t memstart; 357 psize_t memsize; 358 359 /* 360 * Clear out the 7-segment display. Whee, the first visual 361 * indication that we're running kernel code. 362 */ 363 iq80310_7seg(' ', ' '); 364 365 /* 366 * Heads up ... Setup the CPU / MMU / TLB functions 367 */ 368 if (set_cpufuncs()) 369 panic("CPU not recognized!"); 370 371 /* Calibrate the delay loop. */ 372 iq80310_calibrate_delay(); 373 374 /* 375 * Since we map the on-board devices VA==PA, and the kernel 376 * is running VA==PA, it's possible for us to initialize 377 * the console now. 378 */ 379 consinit(); 380 381 #ifdef VERBOSE_INIT_ARM 382 /* Talk to the user */ 383 printf("\nNetBSD/evbarm (IQ80310) booting ...\n"); 384 #endif 385 386 /* 387 * Reset the secondary PCI bus. RedBoot doesn't stop devices 388 * on the PCI bus before handing us control, so we have to 389 * do this. 390 * 391 * XXX This is arguably a bug in RedBoot, and doing this reset 392 * XXX could be problematic in the future if we encounter an 393 * XXX application where the PPB in the i80312 is used as a 394 * XXX PPB. 395 */ 396 { 397 uint32_t reg; 398 399 #ifdef VERBOSE_INIT_ARM 400 printf("Resetting secondary PCI bus...\n"); 401 #endif 402 reg = bus_space_read_4(&obio_bs_tag, 403 I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL); 404 bus_space_write_4(&obio_bs_tag, 405 I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL, 406 reg | PPB_BC_SECONDARY_RESET); 407 delay(10 * 1000); /* 10ms enough? */ 408 bus_space_write_4(&obio_bs_tag, 409 I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL, 410 reg); 411 } 412 413 /* 414 * We are currently running with the MMU enabled and the 415 * entire address space mapped VA==PA, except for the 416 * first 64M of RAM is also double-mapped at 0xc0000000. 417 * There is an L1 page table at 0xa0004000. 418 */ 419 420 /* 421 * Fetch the SDRAM start/size from the i80312 SDRAM configuration 422 * registers. 423 */ 424 i80312_sdram_bounds(&obio_bs_tag, I80312_PMMR_BASE + I80312_MEM_BASE, 425 &memstart, &memsize); 426 427 #ifdef VERBOSE_INIT_ARM 428 printf("initarm: Configuring system ...\n"); 429 #endif 430 431 /* Fake bootconfig structure for the benefit of pmap.c */ 432 /* XXX must make the memory description h/w independent */ 433 bootconfig.dramblocks = 1; 434 bootconfig.dram[0].address = memstart; 435 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 436 437 /* 438 * Set up the variables that define the availablilty of 439 * physical memory. For now, we're going to set 440 * physical_freestart to 0xa0200000 (where the kernel 441 * was loaded), and allocate the memory we need downwards. 442 * If we get too close to the L1 table that we set up, we 443 * will panic. We will update physical_freestart and 444 * physical_freeend later to reflect what pmap_bootstrap() 445 * wants to see. 446 * 447 * XXX pmap_bootstrap() needs an enema. 448 */ 449 physical_start = bootconfig.dram[0].address; 450 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 451 452 physical_freestart = 0xa0009000UL; 453 physical_freeend = 0xa0200000UL; 454 455 physmem = (physical_end - physical_start) / PAGE_SIZE; 456 457 #ifdef VERBOSE_INIT_ARM 458 /* Tell the user about the memory */ 459 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 460 physical_start, physical_end - 1); 461 #endif 462 463 /* 464 * Okay, the kernel starts 2MB in from the bottom of physical 465 * memory. We are going to allocate our bootstrap pages downwards 466 * from there. 467 * 468 * We need to allocate some fixed page tables to get the kernel 469 * going. We allocate one page directory and a number of page 470 * tables and store the physical addresses in the kernel_pt_table 471 * array. 472 * 473 * The kernel page directory must be on a 16K boundary. The page 474 * tables must be on 4K boundaries. What we do is allocate the 475 * page directory on the first 16K boundary that we encounter, and 476 * the page tables on 4K boundaries otherwise. Since we allocate 477 * at least 3 L2 page tables, we are guaranteed to encounter at 478 * least one 16K aligned region. 479 */ 480 481 #ifdef VERBOSE_INIT_ARM 482 printf("Allocating page tables\n"); 483 #endif 484 485 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 486 487 #ifdef VERBOSE_INIT_ARM 488 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 489 physical_freestart, free_pages, free_pages); 490 #endif 491 492 /* Define a macro to simplify memory allocation */ 493 #define valloc_pages(var, np) \ 494 alloc_pages((var).pv_pa, (np)); \ 495 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 496 497 #define alloc_pages(var, np) \ 498 physical_freeend -= ((np) * PAGE_SIZE); \ 499 if (physical_freeend < physical_freestart) \ 500 panic("initarm: out of memory"); \ 501 (var) = physical_freeend; \ 502 free_pages -= (np); \ 503 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 504 505 loop1 = 0; 506 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 507 /* Are we 16KB aligned for an L1 ? */ 508 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 509 && kernel_l1pt.pv_pa == 0) { 510 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 511 } else { 512 valloc_pages(kernel_pt_table[loop1], 513 L2_TABLE_SIZE / PAGE_SIZE); 514 ++loop1; 515 } 516 } 517 518 /* This should never be able to happen but better confirm that. */ 519 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 520 panic("initarm: Failed to align the kernel page directory"); 521 522 /* 523 * Allocate a page for the system page mapped to V0x00000000 524 * This page will just contain the system vectors and can be 525 * shared by all processes. 526 */ 527 alloc_pages(systempage.pv_pa, 1); 528 529 /* Allocate stacks for all modes */ 530 valloc_pages(irqstack, IRQ_STACK_SIZE); 531 valloc_pages(abtstack, ABT_STACK_SIZE); 532 valloc_pages(undstack, UND_STACK_SIZE); 533 valloc_pages(kernelstack, UPAGES); 534 535 /* Allocate enough pages for cleaning the Mini-Data cache. */ 536 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 537 valloc_pages(minidataclean, 1); 538 539 #ifdef VERBOSE_INIT_ARM 540 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 541 irqstack.pv_va); 542 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 543 abtstack.pv_va); 544 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 545 undstack.pv_va); 546 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 547 kernelstack.pv_va); 548 #endif 549 550 /* 551 * XXX Defer this to later so that we can reclaim the memory 552 * XXX used by the RedBoot page tables. 553 */ 554 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 555 556 /* 557 * Ok we have allocated physical pages for the primary kernel 558 * page tables 559 */ 560 561 #ifdef VERBOSE_INIT_ARM 562 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 563 #endif 564 565 /* 566 * Now we start construction of the L1 page table 567 * We start by mapping the L2 page tables into the L1. 568 * This means that we can replace L1 mappings later on if necessary 569 */ 570 l1pagetable = kernel_l1pt.pv_pa; 571 572 /* Map the L2 pages tables in the L1 page table */ 573 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 574 &kernel_pt_table[KERNEL_PT_SYS]); 575 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 576 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 577 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 578 pmap_link_l2pt(l1pagetable, IQ80310_IOPXS_VBASE, 579 &kernel_pt_table[KERNEL_PT_IOPXS]); 580 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 581 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 582 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 583 584 /* update the top of the kernel VM */ 585 pmap_curmaxkvaddr = 586 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 587 588 #ifdef VERBOSE_INIT_ARM 589 printf("Mapping kernel\n"); 590 #endif 591 592 /* Now we fill in the L2 pagetable for the kernel static code/data */ 593 { 594 extern char etext[], _end[]; 595 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 596 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 597 u_int logical; 598 599 textsize = (textsize + PGOFSET) & ~PGOFSET; 600 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 601 602 logical = 0x00200000; /* offset of kernel in RAM */ 603 604 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 605 physical_start + logical, textsize, 606 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 607 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 608 physical_start + logical, totalsize - textsize, 609 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 610 } 611 612 #ifdef VERBOSE_INIT_ARM 613 printf("Constructing L2 page tables\n"); 614 #endif 615 616 /* Map the stack pages */ 617 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 618 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 619 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 620 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 621 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 622 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 623 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 624 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 625 626 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 627 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 628 629 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 630 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 631 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 632 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 633 } 634 635 /* Map the Mini-Data cache clean area. */ 636 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 637 minidataclean.pv_pa); 638 639 /* Map the vector page. */ 640 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 641 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 642 643 /* Map the statically mapped devices. */ 644 pmap_devmap_bootstrap(l1pagetable, iq80310_devmap); 645 646 /* 647 * Give the XScale global cache clean code an appropriately 648 * sized chunk of unmapped VA space starting at 0xff000000 649 * (our device mappings end before this address). 650 */ 651 xscale_cache_clean_addr = 0xff000000U; 652 653 /* 654 * Now we have the real page tables in place so we can switch to them. 655 * Once this is done we will be running with the REAL kernel page 656 * tables. 657 */ 658 659 /* 660 * Update the physical_freestart/physical_freeend/free_pages 661 * variables. 662 */ 663 { 664 extern char _end[]; 665 666 physical_freestart = physical_start + 667 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 668 KERNEL_BASE); 669 physical_freeend = physical_end; 670 free_pages = 671 (physical_freeend - physical_freestart) / PAGE_SIZE; 672 } 673 674 /* Switch tables */ 675 #ifdef VERBOSE_INIT_ARM 676 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 677 physical_freestart, free_pages, free_pages); 678 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 679 #endif 680 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 681 setttb(kernel_l1pt.pv_pa); 682 cpu_tlb_flushID(); 683 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 684 685 /* 686 * Moved from cpu_startup() as data_abort_handler() references 687 * this during uvm init 688 */ 689 proc0paddr = (struct user *)kernelstack.pv_va; 690 lwp0.l_addr = proc0paddr; 691 692 #ifdef VERBOSE_INIT_ARM 693 printf("done!\n"); 694 #endif 695 696 #ifdef VERBOSE_INIT_ARM 697 printf("bootstrap done.\n"); 698 #endif 699 700 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 701 702 /* 703 * Pages were allocated during the secondary bootstrap for the 704 * stacks for different CPU modes. 705 * We must now set the r13 registers in the different CPU modes to 706 * point to these stacks. 707 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 708 * of the stack memory. 709 */ 710 #ifdef VERBOSE_INIT_ARM 711 printf("init subsystems: stacks "); 712 #endif 713 714 set_stackptr(PSR_IRQ32_MODE, 715 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 716 set_stackptr(PSR_ABT32_MODE, 717 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 718 set_stackptr(PSR_UND32_MODE, 719 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 720 721 /* 722 * Well we should set a data abort handler. 723 * Once things get going this will change as we will need a proper 724 * handler. 725 * Until then we will use a handler that just panics but tells us 726 * why. 727 * Initialisation of the vectors will just panic on a data abort. 728 * This just fills in a slightly better one. 729 */ 730 #ifdef VERBOSE_INIT_ARM 731 printf("vectors "); 732 #endif 733 data_abort_handler_address = (u_int)data_abort_handler; 734 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 735 undefined_handler_address = (u_int)undefinedinstruction_bounce; 736 737 /* Initialise the undefined instruction handlers */ 738 #ifdef VERBOSE_INIT_ARM 739 printf("undefined "); 740 #endif 741 undefined_init(); 742 743 /* Load memory into UVM. */ 744 #ifdef VERBOSE_INIT_ARM 745 printf("page "); 746 #endif 747 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 748 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 749 atop(physical_freestart), atop(physical_freeend), 750 VM_FREELIST_DEFAULT); 751 752 /* Boot strap pmap telling it where the kernel page table is */ 753 #ifdef VERBOSE_INIT_ARM 754 printf("pmap "); 755 #endif 756 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 757 758 /* Setup the IRQ system */ 759 #ifdef VERBOSE_INIT_ARM 760 printf("irq "); 761 #endif 762 iq80310_intr_init(); 763 764 #ifdef VERBOSE_INIT_ARM 765 printf("done.\n"); 766 #endif 767 768 #if NKSYMS || defined(DDB) || defined(LKM) 769 /* Firmware doesn't load symbols. */ 770 ksyms_init(0, NULL, NULL); 771 #endif 772 773 #ifdef DDB 774 db_machine_init(); 775 if (boothowto & RB_KDB) 776 Debugger(); 777 #endif 778 779 /* We return the new stack pointer address */ 780 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 781 } 782 783 void 784 consinit(void) 785 { 786 static const bus_addr_t comcnaddrs[] = { 787 IQ80310_UART2, /* com0 (J9) */ 788 IQ80310_UART1, /* com1 (J10) */ 789 }; 790 static int consinit_called; 791 792 if (consinit_called != 0) 793 return; 794 795 consinit_called = 1; 796 797 /* 798 * Console devices are mapped VA==PA. Our devmap reflects 799 * this, so register it now so drivers can map the console 800 * device. 801 */ 802 pmap_devmap_register(iq80310_devmap); 803 804 #if NCOM > 0 805 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 806 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 807 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 808 #else 809 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 810 #endif 811 } 812
Indexes created Wed Oct 22 06:10:02 GMT 2025