iq80310_machdep.c revision 1.76
1 /* $NetBSD: iq80310_machdep.c,v 1.76 2009/11/27 03:23:07 rmind 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 1.76 2009/11/27 03:23:07 rmind 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; 152 153 /*int debug_flags;*/ 154 #ifndef PMAP_STATIC_L1S 155 int max_processes = 64; /* Default number */ 156 #endif /* !PMAP_STATIC_L1S */ 157 158 /* Physical and virtual addresses for some global pages */ 159 pv_addr_t irqstack; 160 pv_addr_t undstack; 161 pv_addr_t abtstack; 162 pv_addr_t kernelstack; 163 pv_addr_t minidataclean; 164 165 vm_offset_t msgbufphys; 166 167 extern u_int data_abort_handler_address; 168 extern u_int prefetch_abort_handler_address; 169 extern u_int undefined_handler_address; 170 171 #ifdef PMAP_DEBUG 172 extern int pmap_debug_level; 173 #endif 174 175 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 176 177 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 178 #define KERNEL_PT_KERNEL_NUM 4 179 180 /* L2 table for mapping i80312 */ 181 #define KERNEL_PT_IOPXS (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 182 183 /* L2 tables for mapping kernel VM */ 184 #define KERNEL_PT_VMDATA (KERNEL_PT_IOPXS + 1) 185 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 186 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 187 188 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 189 190 /* Prototypes */ 191 192 void consinit(void); 193 194 #include "com.h" 195 #if NCOM > 0 196 #include <dev/ic/comreg.h> 197 #include <dev/ic/comvar.h> 198 #endif 199 200 /* 201 * Define the default console speed for the board. This is generally 202 * what the firmware provided with the board defaults to. 203 */ 204 #ifndef CONSPEED 205 #define CONSPEED B115200 206 #endif /* ! CONSPEED */ 207 208 #ifndef CONUNIT 209 #define CONUNIT 0 210 #endif 211 212 #ifndef CONMODE 213 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 214 #endif 215 216 int comcnspeed = CONSPEED; 217 int comcnmode = CONMODE; 218 int comcnunit = CONUNIT; 219 220 /* 221 * void cpu_reboot(int howto, char *bootstr) 222 * 223 * Reboots the system 224 * 225 * Deal with any syncing, unmounting, dumping and shutdown hooks, 226 * then reset the CPU. 227 */ 228 void 229 cpu_reboot(int howto, char *bootstr) 230 { 231 232 /* 233 * If we are still cold then hit the air brakes 234 * and crash to earth fast 235 */ 236 if (cold) { 237 doshutdownhooks(); 238 pmf_system_shutdown(boothowto); 239 printf("The operating system has halted.\n"); 240 printf("Please press any key to reboot.\n\n"); 241 cngetc(); 242 printf("rebooting...\n"); 243 cpu_reset(); 244 /*NOTREACHED*/ 245 } 246 247 /* Disable console buffering */ 248 249 /* 250 * If RB_NOSYNC was not specified sync the discs. 251 * Note: Unless cold is set to 1 here, syslogd will die during the 252 * unmount. It looks like syslogd is getting woken up only to find 253 * that it cannot page part of the binary in as the filesystem has 254 * been unmounted. 255 */ 256 if (!(howto & RB_NOSYNC)) 257 bootsync(); 258 259 /* Say NO to interrupts */ 260 splhigh(); 261 262 /* Do a dump if requested. */ 263 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 264 dumpsys(); 265 266 /* Run any shutdown hooks */ 267 doshutdownhooks(); 268 269 pmf_system_shutdown(boothowto); 270 271 /* Make sure IRQ's are disabled */ 272 IRQdisable; 273 274 if (howto & RB_HALT) { 275 iq80310_7seg('.', '.'); 276 printf("The operating system has halted.\n"); 277 printf("Please press any key to reboot.\n\n"); 278 cngetc(); 279 } 280 281 printf("rebooting...\n"); 282 cpu_reset(); 283 /*NOTREACHED*/ 284 } 285 286 /* Static device mappings. */ 287 static const struct pmap_devmap iq80310_devmap[] = { 288 /* 289 * Map the on-board devices VA == PA so that we can access them 290 * with the MMU on or off. 291 */ 292 { 293 IQ80310_OBIO_BASE, 294 IQ80310_OBIO_BASE, 295 IQ80310_OBIO_SIZE, 296 VM_PROT_READ|VM_PROT_WRITE, 297 PTE_NOCACHE, 298 }, 299 { 300 IQ80310_PIOW_VBASE, 301 I80312_PCI_XLATE_PIOW_BASE, 302 I80312_PCI_XLATE_IOSIZE, 303 VM_PROT_READ|VM_PROT_WRITE, 304 PTE_NOCACHE, 305 }, 306 { 307 IQ80310_SIOW_VBASE, 308 I80312_PCI_XLATE_SIOW_BASE, 309 I80312_PCI_XLATE_IOSIZE, 310 VM_PROT_READ|VM_PROT_WRITE, 311 PTE_NOCACHE, 312 }, 313 { 314 IQ80310_80312_VBASE, 315 I80312_PMMR_BASE, 316 I80312_PMMR_SIZE, 317 VM_PROT_READ|VM_PROT_WRITE, 318 PTE_NOCACHE, 319 }, 320 321 { 322 0, 323 0, 324 0, 325 0, 326 0, 327 } 328 }; 329 330 /* 331 * u_int initarm(...) 332 * 333 * Initial entry point on startup. This gets called before main() is 334 * entered. 335 * It should be responsible for setting up everything that must be 336 * in place when main is called. 337 * This includes 338 * Taking a copy of the boot configuration structure. 339 * Initialising the physical console so characters can be printed. 340 * Setting up page tables for the kernel 341 * Relocating the kernel to the bottom of physical memory 342 */ 343 u_int 344 initarm(void *arg) 345 { 346 extern vaddr_t xscale_cache_clean_addr; 347 #ifdef DIAGNOSTIC 348 extern vsize_t xscale_minidata_clean_size; 349 #endif 350 int loop; 351 int loop1; 352 u_int l1pagetable; 353 paddr_t memstart; 354 psize_t memsize; 355 356 /* 357 * Clear out the 7-segment display. Whee, the first visual 358 * indication that we're running kernel code. 359 */ 360 iq80310_7seg(' ', ' '); 361 362 /* 363 * Heads up ... Setup the CPU / MMU / TLB functions 364 */ 365 if (set_cpufuncs()) 366 panic("CPU not recognized!"); 367 368 /* Calibrate the delay loop. */ 369 iq80310_calibrate_delay(); 370 371 /* 372 * Since we map the on-board devices VA==PA, and the kernel 373 * is running VA==PA, it's possible for us to initialize 374 * the console now. 375 */ 376 consinit(); 377 378 #ifdef VERBOSE_INIT_ARM 379 /* Talk to the user */ 380 printf("\nNetBSD/evbarm (IQ80310) booting ...\n"); 381 #endif 382 383 /* 384 * Reset the secondary PCI bus. RedBoot doesn't stop devices 385 * on the PCI bus before handing us control, so we have to 386 * do this. 387 * 388 * XXX This is arguably a bug in RedBoot, and doing this reset 389 * XXX could be problematic in the future if we encounter an 390 * XXX application where the PPB in the i80312 is used as a 391 * XXX PPB. 392 */ 393 { 394 uint32_t reg; 395 396 #ifdef VERBOSE_INIT_ARM 397 printf("Resetting secondary PCI bus...\n"); 398 #endif 399 reg = bus_space_read_4(&obio_bs_tag, 400 I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL); 401 bus_space_write_4(&obio_bs_tag, 402 I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL, 403 reg | PPB_BC_SECONDARY_RESET); 404 delay(10 * 1000); /* 10ms enough? */ 405 bus_space_write_4(&obio_bs_tag, 406 I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL, 407 reg); 408 } 409 410 /* 411 * We are currently running with the MMU enabled and the 412 * entire address space mapped VA==PA, except for the 413 * first 64M of RAM is also double-mapped at 0xc0000000. 414 * There is an L1 page table at 0xa0004000. 415 */ 416 417 /* 418 * Fetch the SDRAM start/size from the i80312 SDRAM configuration 419 * registers. 420 */ 421 i80312_sdram_bounds(&obio_bs_tag, I80312_PMMR_BASE + I80312_MEM_BASE, 422 &memstart, &memsize); 423 424 #ifdef VERBOSE_INIT_ARM 425 printf("initarm: Configuring system ...\n"); 426 #endif 427 428 /* Fake bootconfig structure for the benefit of pmap.c */ 429 /* XXX must make the memory description h/w independent */ 430 bootconfig.dramblocks = 1; 431 bootconfig.dram[0].address = memstart; 432 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 433 434 /* 435 * Set up the variables that define the availablilty of 436 * physical memory. For now, we're going to set 437 * physical_freestart to 0xa0200000 (where the kernel 438 * was loaded), and allocate the memory we need downwards. 439 * If we get too close to the L1 table that we set up, we 440 * will panic. We will update physical_freestart and 441 * physical_freeend later to reflect what pmap_bootstrap() 442 * wants to see. 443 * 444 * XXX pmap_bootstrap() needs an enema. 445 */ 446 physical_start = bootconfig.dram[0].address; 447 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 448 449 physical_freestart = 0xa0009000UL; 450 physical_freeend = 0xa0200000UL; 451 452 physmem = (physical_end - physical_start) / PAGE_SIZE; 453 454 #ifdef VERBOSE_INIT_ARM 455 /* Tell the user about the memory */ 456 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 457 physical_start, physical_end - 1); 458 #endif 459 460 /* 461 * Okay, the kernel starts 2MB in from the bottom of physical 462 * memory. We are going to allocate our bootstrap pages downwards 463 * from there. 464 * 465 * We need to allocate some fixed page tables to get the kernel 466 * going. We allocate one page directory and a number of page 467 * tables and store the physical addresses in the kernel_pt_table 468 * array. 469 * 470 * The kernel page directory must be on a 16K boundary. The page 471 * tables must be on 4K boundaries. What we do is allocate the 472 * page directory on the first 16K boundary that we encounter, and 473 * the page tables on 4K boundaries otherwise. Since we allocate 474 * at least 3 L2 page tables, we are guaranteed to encounter at 475 * least one 16K aligned region. 476 */ 477 478 #ifdef VERBOSE_INIT_ARM 479 printf("Allocating page tables\n"); 480 #endif 481 482 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 483 484 #ifdef VERBOSE_INIT_ARM 485 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 486 physical_freestart, free_pages, free_pages); 487 #endif 488 489 /* Define a macro to simplify memory allocation */ 490 #define valloc_pages(var, np) \ 491 alloc_pages((var).pv_pa, (np)); \ 492 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 493 494 #define alloc_pages(var, np) \ 495 physical_freeend -= ((np) * PAGE_SIZE); \ 496 if (physical_freeend < physical_freestart) \ 497 panic("initarm: out of memory"); \ 498 (var) = physical_freeend; \ 499 free_pages -= (np); \ 500 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 501 502 loop1 = 0; 503 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 504 /* Are we 16KB aligned for an L1 ? */ 505 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 506 && kernel_l1pt.pv_pa == 0) { 507 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 508 } else { 509 valloc_pages(kernel_pt_table[loop1], 510 L2_TABLE_SIZE / PAGE_SIZE); 511 ++loop1; 512 } 513 } 514 515 /* This should never be able to happen but better confirm that. */ 516 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 517 panic("initarm: Failed to align the kernel page directory"); 518 519 /* 520 * Allocate a page for the system page mapped to V0x00000000 521 * This page will just contain the system vectors and can be 522 * shared by all processes. 523 */ 524 alloc_pages(systempage.pv_pa, 1); 525 526 /* Allocate stacks for all modes */ 527 valloc_pages(irqstack, IRQ_STACK_SIZE); 528 valloc_pages(abtstack, ABT_STACK_SIZE); 529 valloc_pages(undstack, UND_STACK_SIZE); 530 valloc_pages(kernelstack, UPAGES); 531 532 /* Allocate enough pages for cleaning the Mini-Data cache. */ 533 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 534 valloc_pages(minidataclean, 1); 535 536 #ifdef VERBOSE_INIT_ARM 537 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 538 irqstack.pv_va); 539 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 540 abtstack.pv_va); 541 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 542 undstack.pv_va); 543 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 544 kernelstack.pv_va); 545 #endif 546 547 /* 548 * XXX Defer this to later so that we can reclaim the memory 549 * XXX used by the RedBoot page tables. 550 */ 551 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 552 553 /* 554 * Ok we have allocated physical pages for the primary kernel 555 * page tables 556 */ 557 558 #ifdef VERBOSE_INIT_ARM 559 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 560 #endif 561 562 /* 563 * Now we start construction of the L1 page table 564 * We start by mapping the L2 page tables into the L1. 565 * This means that we can replace L1 mappings later on if necessary 566 */ 567 l1pagetable = kernel_l1pt.pv_pa; 568 569 /* Map the L2 pages tables in the L1 page table */ 570 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 571 &kernel_pt_table[KERNEL_PT_SYS]); 572 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 573 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 574 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 575 pmap_link_l2pt(l1pagetable, IQ80310_IOPXS_VBASE, 576 &kernel_pt_table[KERNEL_PT_IOPXS]); 577 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 578 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 579 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 580 581 /* update the top of the kernel VM */ 582 pmap_curmaxkvaddr = 583 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 584 585 #ifdef VERBOSE_INIT_ARM 586 printf("Mapping kernel\n"); 587 #endif 588 589 /* Now we fill in the L2 pagetable for the kernel static code/data */ 590 { 591 extern char etext[], _end[]; 592 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 593 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 594 u_int logical; 595 596 textsize = (textsize + PGOFSET) & ~PGOFSET; 597 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 598 599 logical = 0x00200000; /* offset of kernel in RAM */ 600 601 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 602 physical_start + logical, textsize, 603 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 604 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 605 physical_start + logical, totalsize - textsize, 606 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 607 } 608 609 #ifdef VERBOSE_INIT_ARM 610 printf("Constructing L2 page tables\n"); 611 #endif 612 613 /* Map the stack pages */ 614 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 615 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 616 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 617 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 618 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 619 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 620 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 621 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 622 623 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 624 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 625 626 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 627 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 628 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 629 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 630 } 631 632 /* Map the Mini-Data cache clean area. */ 633 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 634 minidataclean.pv_pa); 635 636 /* Map the vector page. */ 637 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 638 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 639 640 /* Map the statically mapped devices. */ 641 pmap_devmap_bootstrap(l1pagetable, iq80310_devmap); 642 643 /* 644 * Give the XScale global cache clean code an appropriately 645 * sized chunk of unmapped VA space starting at 0xff000000 646 * (our device mappings end before this address). 647 */ 648 xscale_cache_clean_addr = 0xff000000U; 649 650 /* 651 * Now we have the real page tables in place so we can switch to them. 652 * Once this is done we will be running with the REAL kernel page 653 * tables. 654 */ 655 656 /* 657 * Update the physical_freestart/physical_freeend/free_pages 658 * variables. 659 */ 660 { 661 extern char _end[]; 662 663 physical_freestart = physical_start + 664 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 665 KERNEL_BASE); 666 physical_freeend = physical_end; 667 free_pages = 668 (physical_freeend - physical_freestart) / PAGE_SIZE; 669 } 670 671 /* Switch tables */ 672 #ifdef VERBOSE_INIT_ARM 673 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 674 physical_freestart, free_pages, free_pages); 675 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 676 #endif 677 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 678 setttb(kernel_l1pt.pv_pa); 679 cpu_tlb_flushID(); 680 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 681 682 /* 683 * Moved from cpu_startup() as data_abort_handler() references 684 * this during uvm init 685 */ 686 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 687 688 #ifdef VERBOSE_INIT_ARM 689 printf("done!\n"); 690 #endif 691 692 #ifdef VERBOSE_INIT_ARM 693 printf("bootstrap done.\n"); 694 #endif 695 696 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 697 698 /* 699 * Pages were allocated during the secondary bootstrap for the 700 * stacks for different CPU modes. 701 * We must now set the r13 registers in the different CPU modes to 702 * point to these stacks. 703 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 704 * of the stack memory. 705 */ 706 #ifdef VERBOSE_INIT_ARM 707 printf("init subsystems: stacks "); 708 #endif 709 710 set_stackptr(PSR_IRQ32_MODE, 711 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 712 set_stackptr(PSR_ABT32_MODE, 713 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 714 set_stackptr(PSR_UND32_MODE, 715 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 716 717 /* 718 * Well we should set a data abort handler. 719 * Once things get going this will change as we will need a proper 720 * handler. 721 * Until then we will use a handler that just panics but tells us 722 * why. 723 * Initialisation of the vectors will just panic on a data abort. 724 * This just fills in a slightly better one. 725 */ 726 #ifdef VERBOSE_INIT_ARM 727 printf("vectors "); 728 #endif 729 data_abort_handler_address = (u_int)data_abort_handler; 730 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 731 undefined_handler_address = (u_int)undefinedinstruction_bounce; 732 733 /* Initialise the undefined instruction handlers */ 734 #ifdef VERBOSE_INIT_ARM 735 printf("undefined "); 736 #endif 737 undefined_init(); 738 739 /* Load memory into UVM. */ 740 #ifdef VERBOSE_INIT_ARM 741 printf("page "); 742 #endif 743 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 744 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 745 atop(physical_freestart), atop(physical_freeend), 746 VM_FREELIST_DEFAULT); 747 748 /* Boot strap pmap telling it where the kernel page table is */ 749 #ifdef VERBOSE_INIT_ARM 750 printf("pmap "); 751 #endif 752 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 753 754 /* Setup the IRQ system */ 755 #ifdef VERBOSE_INIT_ARM 756 printf("irq "); 757 #endif 758 iq80310_intr_init(); 759 760 #ifdef VERBOSE_INIT_ARM 761 printf("done.\n"); 762 #endif 763 764 #ifdef DDB 765 db_machine_init(); 766 if (boothowto & RB_KDB) 767 Debugger(); 768 #endif 769 770 /* We return the new stack pointer address */ 771 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 772 } 773 774 void 775 consinit(void) 776 { 777 static const bus_addr_t comcnaddrs[] = { 778 IQ80310_UART2, /* com0 (J9) */ 779 IQ80310_UART1, /* com1 (J10) */ 780 }; 781 static int consinit_called; 782 783 if (consinit_called != 0) 784 return; 785 786 consinit_called = 1; 787 788 /* 789 * Console devices are mapped VA==PA. Our devmap reflects 790 * this, so register it now so drivers can map the console 791 * device. 792 */ 793 pmap_devmap_register(iq80310_devmap); 794 795 #if NCOM > 0 796 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 797 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 798 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 799 #else 800 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 801 #endif 802 } 803
Indexes created Wed Oct 22 13:09:56 GMT 2025