iq80310_machdep.c revision 1.65.10.3
1 /* $NetBSD: iq80310_machdep.c,v 1.65.10.3 2008/01/21 09:36:12 yamt 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 1.65.10.3 2008/01/21 09:36:12 yamt 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 systempage; 161 pv_addr_t irqstack; 162 pv_addr_t undstack; 163 pv_addr_t abtstack; 164 pv_addr_t kernelstack; 165 pv_addr_t minidataclean; 166 167 vm_offset_t msgbufphys; 168 169 extern u_int data_abort_handler_address; 170 extern u_int prefetch_abort_handler_address; 171 extern u_int undefined_handler_address; 172 173 #ifdef PMAP_DEBUG 174 extern int pmap_debug_level; 175 #endif 176 177 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 178 179 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 180 #define KERNEL_PT_KERNEL_NUM 4 181 182 /* L2 table for mapping i80312 */ 183 #define KERNEL_PT_IOPXS (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 184 185 /* L2 tables for mapping kernel VM */ 186 #define KERNEL_PT_VMDATA (KERNEL_PT_IOPXS + 1) 187 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 188 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 189 190 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 191 192 struct user *proc0paddr; 193 194 /* Prototypes */ 195 196 void consinit(void); 197 198 #include "com.h" 199 #if NCOM > 0 200 #include <dev/ic/comreg.h> 201 #include <dev/ic/comvar.h> 202 #endif 203 204 /* 205 * Define the default console speed for the board. This is generally 206 * what the firmware provided with the board defaults to. 207 */ 208 #ifndef CONSPEED 209 #define CONSPEED B115200 210 #endif /* ! CONSPEED */ 211 212 #ifndef CONUNIT 213 #define CONUNIT 0 214 #endif 215 216 #ifndef CONMODE 217 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 218 #endif 219 220 int comcnspeed = CONSPEED; 221 int comcnmode = CONMODE; 222 int comcnunit = CONUNIT; 223 224 /* 225 * void cpu_reboot(int howto, char *bootstr) 226 * 227 * Reboots the system 228 * 229 * Deal with any syncing, unmounting, dumping and shutdown hooks, 230 * then reset the CPU. 231 */ 232 void 233 cpu_reboot(int howto, char *bootstr) 234 { 235 236 /* 237 * If we are still cold then hit the air brakes 238 * and crash to earth fast 239 */ 240 if (cold) { 241 doshutdownhooks(); 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 /* Make sure IRQ's are disabled */ 273 IRQdisable; 274 275 if (howto & RB_HALT) { 276 iq80310_7seg('.', '.'); 277 printf("The operating system has halted.\n"); 278 printf("Please press any key to reboot.\n\n"); 279 cngetc(); 280 } 281 282 printf("rebooting...\n"); 283 cpu_reset(); 284 /*NOTREACHED*/ 285 } 286 287 /* Static device mappings. */ 288 static const struct pmap_devmap iq80310_devmap[] = { 289 /* 290 * Map the on-board devices VA == PA so that we can access them 291 * with the MMU on or off. 292 */ 293 { 294 IQ80310_OBIO_BASE, 295 IQ80310_OBIO_BASE, 296 IQ80310_OBIO_SIZE, 297 VM_PROT_READ|VM_PROT_WRITE, 298 PTE_NOCACHE, 299 }, 300 { 301 IQ80310_PIOW_VBASE, 302 I80312_PCI_XLATE_PIOW_BASE, 303 I80312_PCI_XLATE_IOSIZE, 304 VM_PROT_READ|VM_PROT_WRITE, 305 PTE_NOCACHE, 306 }, 307 { 308 IQ80310_SIOW_VBASE, 309 I80312_PCI_XLATE_SIOW_BASE, 310 I80312_PCI_XLATE_IOSIZE, 311 VM_PROT_READ|VM_PROT_WRITE, 312 PTE_NOCACHE, 313 }, 314 { 315 IQ80310_80312_VBASE, 316 I80312_PMMR_BASE, 317 I80312_PMMR_SIZE, 318 VM_PROT_READ|VM_PROT_WRITE, 319 PTE_NOCACHE, 320 }, 321 322 { 323 0, 324 0, 325 0, 326 0, 327 0, 328 } 329 }; 330 331 /* 332 * u_int initarm(...) 333 * 334 * Initial entry point on startup. This gets called before main() is 335 * entered. 336 * It should be responsible for setting up everything that must be 337 * in place when main is called. 338 * This includes 339 * Taking a copy of the boot configuration structure. 340 * Initialising the physical console so characters can be printed. 341 * Setting up page tables for the kernel 342 * Relocating the kernel to the bottom of physical memory 343 */ 344 u_int 345 initarm(void *arg) 346 { 347 extern vaddr_t xscale_cache_clean_addr; 348 #ifdef DIAGNOSTIC 349 extern vsize_t xscale_minidata_clean_size; 350 #endif 351 int loop; 352 int loop1; 353 u_int l1pagetable; 354 pv_addr_t kernel_l1pt; 355 paddr_t memstart; 356 psize_t memsize; 357 358 /* 359 * Clear out the 7-segment display. Whee, the first visual 360 * indication that we're running kernel code. 361 */ 362 iq80310_7seg(' ', ' '); 363 364 /* 365 * Heads up ... Setup the CPU / MMU / TLB functions 366 */ 367 if (set_cpufuncs()) 368 panic("CPU not recognized!"); 369 370 /* Calibrate the delay loop. */ 371 iq80310_calibrate_delay(); 372 373 /* 374 * Since we map the on-board devices VA==PA, and the kernel 375 * is running VA==PA, it's possible for us to initialize 376 * the console now. 377 */ 378 consinit(); 379 380 #ifdef VERBOSE_INIT_ARM 381 /* Talk to the user */ 382 printf("\nNetBSD/evbarm (IQ80310) booting ...\n"); 383 #endif 384 385 /* 386 * Reset the secondary PCI bus. RedBoot doesn't stop devices 387 * on the PCI bus before handing us control, so we have to 388 * do this. 389 * 390 * XXX This is arguably a bug in RedBoot, and doing this reset 391 * XXX could be problematic in the future if we encounter an 392 * XXX application where the PPB in the i80312 is used as a 393 * XXX PPB. 394 */ 395 { 396 uint32_t reg; 397 398 #ifdef VERBOSE_INIT_ARM 399 printf("Resetting secondary PCI bus...\n"); 400 #endif 401 reg = bus_space_read_4(&obio_bs_tag, 402 I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL); 403 bus_space_write_4(&obio_bs_tag, 404 I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL, 405 reg | PPB_BC_SECONDARY_RESET); 406 delay(10 * 1000); /* 10ms enough? */ 407 bus_space_write_4(&obio_bs_tag, 408 I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL, 409 reg); 410 } 411 412 /* 413 * We are currently running with the MMU enabled and the 414 * entire address space mapped VA==PA, except for the 415 * first 64M of RAM is also double-mapped at 0xc0000000. 416 * There is an L1 page table at 0xa0004000. 417 */ 418 419 /* 420 * Fetch the SDRAM start/size from the i80312 SDRAM configuration 421 * registers. 422 */ 423 i80312_sdram_bounds(&obio_bs_tag, I80312_PMMR_BASE + I80312_MEM_BASE, 424 &memstart, &memsize); 425 426 #ifdef VERBOSE_INIT_ARM 427 printf("initarm: Configuring system ...\n"); 428 #endif 429 430 /* Fake bootconfig structure for the benefit of pmap.c */ 431 /* XXX must make the memory description h/w independent */ 432 bootconfig.dramblocks = 1; 433 bootconfig.dram[0].address = memstart; 434 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 435 436 /* 437 * Set up the variables that define the availablilty of 438 * physical memory. For now, we're going to set 439 * physical_freestart to 0xa0200000 (where the kernel 440 * was loaded), and allocate the memory we need downwards. 441 * If we get too close to the L1 table that we set up, we 442 * will panic. We will update physical_freestart and 443 * physical_freeend later to reflect what pmap_bootstrap() 444 * wants to see. 445 * 446 * XXX pmap_bootstrap() needs an enema. 447 */ 448 physical_start = bootconfig.dram[0].address; 449 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 450 451 physical_freestart = 0xa0009000UL; 452 physical_freeend = 0xa0200000UL; 453 454 physmem = (physical_end - physical_start) / PAGE_SIZE; 455 456 #ifdef VERBOSE_INIT_ARM 457 /* Tell the user about the memory */ 458 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 459 physical_start, physical_end - 1); 460 #endif 461 462 /* 463 * Okay, the kernel starts 2MB in from the bottom of physical 464 * memory. We are going to allocate our bootstrap pages downwards 465 * from there. 466 * 467 * We need to allocate some fixed page tables to get the kernel 468 * going. We allocate one page directory and a number of page 469 * tables and store the physical addresses in the kernel_pt_table 470 * array. 471 * 472 * The kernel page directory must be on a 16K boundary. The page 473 * tables must be on 4K boundaries. What we do is allocate the 474 * page directory on the first 16K boundary that we encounter, and 475 * the page tables on 4K boundaries otherwise. Since we allocate 476 * at least 3 L2 page tables, we are guaranteed to encounter at 477 * least one 16K aligned region. 478 */ 479 480 #ifdef VERBOSE_INIT_ARM 481 printf("Allocating page tables\n"); 482 #endif 483 484 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 485 486 #ifdef VERBOSE_INIT_ARM 487 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 488 physical_freestart, free_pages, free_pages); 489 #endif 490 491 /* Define a macro to simplify memory allocation */ 492 #define valloc_pages(var, np) \ 493 alloc_pages((var).pv_pa, (np)); \ 494 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 495 496 #define alloc_pages(var, np) \ 497 physical_freeend -= ((np) * PAGE_SIZE); \ 498 if (physical_freeend < physical_freestart) \ 499 panic("initarm: out of memory"); \ 500 (var) = physical_freeend; \ 501 free_pages -= (np); \ 502 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 503 504 loop1 = 0; 505 kernel_l1pt.pv_pa = 0; 506 kernel_l1pt.pv_va = 0; 507 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 508 /* Are we 16KB aligned for an L1 ? */ 509 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 510 && kernel_l1pt.pv_pa == 0) { 511 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 512 } else { 513 valloc_pages(kernel_pt_table[loop1], 514 L2_TABLE_SIZE / PAGE_SIZE); 515 ++loop1; 516 } 517 } 518 519 /* This should never be able to happen but better confirm that. */ 520 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 521 panic("initarm: Failed to align the kernel page directory"); 522 523 /* 524 * Allocate a page for the system page mapped to V0x00000000 525 * This page will just contain the system vectors and can be 526 * shared by all processes. 527 */ 528 alloc_pages(systempage.pv_pa, 1); 529 530 /* Allocate stacks for all modes */ 531 valloc_pages(irqstack, IRQ_STACK_SIZE); 532 valloc_pages(abtstack, ABT_STACK_SIZE); 533 valloc_pages(undstack, UND_STACK_SIZE); 534 valloc_pages(kernelstack, UPAGES); 535 536 /* Allocate enough pages for cleaning the Mini-Data cache. */ 537 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 538 valloc_pages(minidataclean, 1); 539 540 #ifdef VERBOSE_INIT_ARM 541 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 542 irqstack.pv_va); 543 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 544 abtstack.pv_va); 545 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 546 undstack.pv_va); 547 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 548 kernelstack.pv_va); 549 #endif 550 551 /* 552 * XXX Defer this to later so that we can reclaim the memory 553 * XXX used by the RedBoot page tables. 554 */ 555 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 556 557 /* 558 * Ok we have allocated physical pages for the primary kernel 559 * page tables 560 */ 561 562 #ifdef VERBOSE_INIT_ARM 563 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 564 #endif 565 566 /* 567 * Now we start construction of the L1 page table 568 * We start by mapping the L2 page tables into the L1. 569 * This means that we can replace L1 mappings later on if necessary 570 */ 571 l1pagetable = kernel_l1pt.pv_pa; 572 573 /* Map the L2 pages tables in the L1 page table */ 574 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 575 &kernel_pt_table[KERNEL_PT_SYS]); 576 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 577 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 578 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 579 pmap_link_l2pt(l1pagetable, IQ80310_IOPXS_VBASE, 580 &kernel_pt_table[KERNEL_PT_IOPXS]); 581 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 582 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 583 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 584 585 /* update the top of the kernel VM */ 586 pmap_curmaxkvaddr = 587 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 588 589 #ifdef VERBOSE_INIT_ARM 590 printf("Mapping kernel\n"); 591 #endif 592 593 /* Now we fill in the L2 pagetable for the kernel static code/data */ 594 { 595 extern char etext[], _end[]; 596 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 597 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 598 u_int logical; 599 600 textsize = (textsize + PGOFSET) & ~PGOFSET; 601 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 602 603 logical = 0x00200000; /* offset of kernel in RAM */ 604 605 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 606 physical_start + logical, textsize, 607 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 608 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 609 physical_start + logical, totalsize - textsize, 610 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 611 } 612 613 #ifdef VERBOSE_INIT_ARM 614 printf("Constructing L2 page tables\n"); 615 #endif 616 617 /* Map the stack pages */ 618 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 619 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 620 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 621 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 622 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 623 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 624 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 625 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 626 627 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 628 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 629 630 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 631 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 632 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 633 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 634 } 635 636 /* Map the Mini-Data cache clean area. */ 637 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 638 minidataclean.pv_pa); 639 640 /* Map the vector page. */ 641 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 642 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 643 644 /* Map the statically mapped devices. */ 645 pmap_devmap_bootstrap(l1pagetable, iq80310_devmap); 646 647 /* 648 * Give the XScale global cache clean code an appropriately 649 * sized chunk of unmapped VA space starting at 0xff000000 650 * (our device mappings end before this address). 651 */ 652 xscale_cache_clean_addr = 0xff000000U; 653 654 /* 655 * Now we have the real page tables in place so we can switch to them. 656 * Once this is done we will be running with the REAL kernel page 657 * tables. 658 */ 659 660 /* 661 * Update the physical_freestart/physical_freeend/free_pages 662 * variables. 663 */ 664 { 665 extern char _end[]; 666 667 physical_freestart = physical_start + 668 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 669 KERNEL_BASE); 670 physical_freeend = physical_end; 671 free_pages = 672 (physical_freeend - physical_freestart) / PAGE_SIZE; 673 } 674 675 /* Switch tables */ 676 #ifdef VERBOSE_INIT_ARM 677 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 678 physical_freestart, free_pages, free_pages); 679 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 680 #endif 681 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 682 setttb(kernel_l1pt.pv_pa); 683 cpu_tlb_flushID(); 684 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 685 686 /* 687 * Moved from cpu_startup() as data_abort_handler() references 688 * this during uvm init 689 */ 690 proc0paddr = (struct user *)kernelstack.pv_va; 691 lwp0.l_addr = proc0paddr; 692 693 #ifdef VERBOSE_INIT_ARM 694 printf("done!\n"); 695 #endif 696 697 #ifdef VERBOSE_INIT_ARM 698 printf("bootstrap done.\n"); 699 #endif 700 701 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 702 703 /* 704 * Pages were allocated during the secondary bootstrap for the 705 * stacks for different CPU modes. 706 * We must now set the r13 registers in the different CPU modes to 707 * point to these stacks. 708 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 709 * of the stack memory. 710 */ 711 #ifdef VERBOSE_INIT_ARM 712 printf("init subsystems: stacks "); 713 #endif 714 715 set_stackptr(PSR_IRQ32_MODE, 716 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 717 set_stackptr(PSR_ABT32_MODE, 718 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 719 set_stackptr(PSR_UND32_MODE, 720 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 721 722 /* 723 * Well we should set a data abort handler. 724 * Once things get going this will change as we will need a proper 725 * handler. 726 * Until then we will use a handler that just panics but tells us 727 * why. 728 * Initialisation of the vectors will just panic on a data abort. 729 * This just fills in a slightly better one. 730 */ 731 #ifdef VERBOSE_INIT_ARM 732 printf("vectors "); 733 #endif 734 data_abort_handler_address = (u_int)data_abort_handler; 735 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 736 undefined_handler_address = (u_int)undefinedinstruction_bounce; 737 738 /* Initialise the undefined instruction handlers */ 739 #ifdef VERBOSE_INIT_ARM 740 printf("undefined "); 741 #endif 742 undefined_init(); 743 744 /* Load memory into UVM. */ 745 #ifdef VERBOSE_INIT_ARM 746 printf("page "); 747 #endif 748 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 749 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 750 atop(physical_freestart), atop(physical_freeend), 751 VM_FREELIST_DEFAULT); 752 753 /* Boot strap pmap telling it where the kernel page table is */ 754 #ifdef VERBOSE_INIT_ARM 755 printf("pmap "); 756 #endif 757 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 758 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 #if NKSYMS || defined(DDB) || defined(LKM) 771 /* Firmware doesn't load symbols. */ 772 ksyms_init(0, NULL, NULL); 773 #endif 774 775 #ifdef DDB 776 db_machine_init(); 777 if (boothowto & RB_KDB) 778 Debugger(); 779 #endif 780 781 /* We return the new stack pointer address */ 782 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 783 } 784 785 void 786 consinit(void) 787 { 788 static const bus_addr_t comcnaddrs[] = { 789 IQ80310_UART2, /* com0 (J9) */ 790 IQ80310_UART1, /* com1 (J10) */ 791 }; 792 static int consinit_called; 793 794 if (consinit_called != 0) 795 return; 796 797 consinit_called = 1; 798 799 /* 800 * Console devices are mapped VA==PA. Our devmap reflects 801 * this, so register it now so drivers can map the console 802 * device. 803 */ 804 pmap_devmap_register(iq80310_devmap); 805 806 #if NCOM > 0 807 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 808 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 809 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 810 #else 811 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 812 #endif 813 } 814
Indexes created Mon Oct 27 08:10:08 GMT 2025