iq80310_machdep.c revision 1.61
1 /* $NetBSD: iq80310_machdep.c,v 1.61 2003/07/15 00:25:02 lukem 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 1.61 2003/07/15 00:25:02 lukem 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 systempage; 166 pv_addr_t irqstack; 167 pv_addr_t undstack; 168 pv_addr_t abtstack; 169 pv_addr_t kernelstack; 170 pv_addr_t minidataclean; 171 172 vm_offset_t msgbufphys; 173 174 extern u_int data_abort_handler_address; 175 extern u_int prefetch_abort_handler_address; 176 extern u_int undefined_handler_address; 177 178 #ifdef PMAP_DEBUG 179 extern int pmap_debug_level; 180 #endif 181 182 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 183 184 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 185 #define KERNEL_PT_KERNEL_NUM 2 186 187 /* L2 table for mapping i80312 */ 188 #define KERNEL_PT_IOPXS (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 189 190 /* L2 tables for mapping kernel VM */ 191 #define KERNEL_PT_VMDATA (KERNEL_PT_IOPXS + 1) 192 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 193 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 194 195 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 196 197 struct user *proc0paddr; 198 199 /* Prototypes */ 200 201 void consinit(void); 202 203 #include "com.h" 204 #if NCOM > 0 205 #include <dev/ic/comreg.h> 206 #include <dev/ic/comvar.h> 207 #endif 208 209 /* 210 * Define the default console speed for the board. This is generally 211 * what the firmware provided with the board defaults to. 212 */ 213 #ifndef CONSPEED 214 #define CONSPEED B115200 215 #endif /* ! CONSPEED */ 216 217 #ifndef CONUNIT 218 #define CONUNIT 0 219 #endif 220 221 #ifndef CONMODE 222 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 223 #endif 224 225 int comcnspeed = CONSPEED; 226 int comcnmode = CONMODE; 227 int comcnunit = CONUNIT; 228 229 /* 230 * void cpu_reboot(int howto, char *bootstr) 231 * 232 * Reboots the system 233 * 234 * Deal with any syncing, unmounting, dumping and shutdown hooks, 235 * then reset the CPU. 236 */ 237 void 238 cpu_reboot(int howto, char *bootstr) 239 { 240 241 /* 242 * If we are still cold then hit the air brakes 243 * and crash to earth fast 244 */ 245 if (cold) { 246 doshutdownhooks(); 247 printf("The operating system has halted.\n"); 248 printf("Please press any key to reboot.\n\n"); 249 cngetc(); 250 printf("rebooting...\n"); 251 cpu_reset(); 252 /*NOTREACHED*/ 253 } 254 255 /* Disable console buffering */ 256 257 /* 258 * If RB_NOSYNC was not specified sync the discs. 259 * Note: Unless cold is set to 1 here, syslogd will die during the 260 * unmount. It looks like syslogd is getting woken up only to find 261 * that it cannot page part of the binary in as the filesystem has 262 * been unmounted. 263 */ 264 if (!(howto & RB_NOSYNC)) 265 bootsync(); 266 267 /* Say NO to interrupts */ 268 splhigh(); 269 270 /* Do a dump if requested. */ 271 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 272 dumpsys(); 273 274 /* Run any shutdown hooks */ 275 doshutdownhooks(); 276 277 /* Make sure IRQ's are disabled */ 278 IRQdisable; 279 280 if (howto & RB_HALT) { 281 iq80310_7seg('.', '.'); 282 printf("The operating system has halted.\n"); 283 printf("Please press any key to reboot.\n\n"); 284 cngetc(); 285 } 286 287 printf("rebooting...\n"); 288 cpu_reset(); 289 /*NOTREACHED*/ 290 } 291 292 /* Static device mappings. */ 293 static const struct pmap_devmap iq80310_devmap[] = { 294 /* 295 * Map the on-board devices VA == PA so that we can access them 296 * with the MMU on or off. 297 */ 298 { 299 IQ80310_OBIO_BASE, 300 IQ80310_OBIO_BASE, 301 IQ80310_OBIO_SIZE, 302 VM_PROT_READ|VM_PROT_WRITE, 303 PTE_NOCACHE, 304 }, 305 { 306 IQ80310_PIOW_VBASE, 307 I80312_PCI_XLATE_PIOW_BASE, 308 I80312_PCI_XLATE_IOSIZE, 309 VM_PROT_READ|VM_PROT_WRITE, 310 PTE_NOCACHE, 311 }, 312 { 313 IQ80310_SIOW_VBASE, 314 I80312_PCI_XLATE_SIOW_BASE, 315 I80312_PCI_XLATE_IOSIZE, 316 VM_PROT_READ|VM_PROT_WRITE, 317 PTE_NOCACHE, 318 }, 319 { 320 IQ80310_80312_VBASE, 321 I80312_PMMR_BASE, 322 I80312_PMMR_SIZE, 323 VM_PROT_READ|VM_PROT_WRITE, 324 PTE_NOCACHE, 325 }, 326 327 { 328 0, 329 0, 330 0, 331 0, 332 0, 333 } 334 }; 335 336 /* 337 * u_int initarm(...) 338 * 339 * Initial entry point on startup. This gets called before main() is 340 * entered. 341 * It should be responsible for setting up everything that must be 342 * in place when main is called. 343 * This includes 344 * Taking a copy of the boot configuration structure. 345 * Initialising the physical console so characters can be printed. 346 * Setting up page tables for the kernel 347 * Relocating the kernel to the bottom of physical memory 348 */ 349 u_int 350 initarm(void *arg) 351 { 352 extern vaddr_t xscale_cache_clean_addr; 353 #ifdef DIAGNOSTIC 354 extern vsize_t xscale_minidata_clean_size; 355 #endif 356 int loop; 357 int loop1; 358 u_int l1pagetable; 359 pv_addr_t kernel_l1pt; 360 paddr_t memstart; 361 psize_t memsize; 362 363 /* 364 * Clear out the 7-segment display. Whee, the first visual 365 * indication that we're running kernel code. 366 */ 367 iq80310_7seg(' ', ' '); 368 369 /* 370 * Heads up ... Setup the CPU / MMU / TLB functions 371 */ 372 if (set_cpufuncs()) 373 panic("cpu not recognized!"); 374 375 /* Calibrate the delay loop. */ 376 iq80310_calibrate_delay(); 377 378 /* 379 * Since we map the on-board devices VA==PA, and the kernel 380 * is running VA==PA, it's possible for us to initialize 381 * the console now. 382 */ 383 consinit(); 384 385 #ifdef VERBOSE_INIT_ARM 386 /* Talk to the user */ 387 printf("\nNetBSD/evbarm (IQ80310) booting ...\n"); 388 #endif 389 390 /* 391 * Reset the secondary PCI bus. RedBoot doesn't stop devices 392 * on the PCI bus before handing us control, so we have to 393 * do this. 394 * 395 * XXX This is arguably a bug in RedBoot, and doing this reset 396 * XXX could be problematic in the future if we encounter an 397 * XXX application where the PPB in the i80312 is used as a 398 * XXX PPB. 399 */ 400 { 401 uint32_t reg; 402 403 #ifdef VERBOSE_INIT_ARM 404 printf("Resetting secondary PCI bus...\n"); 405 #endif 406 reg = bus_space_read_4(&obio_bs_tag, 407 I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL); 408 bus_space_write_4(&obio_bs_tag, 409 I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL, 410 reg | PPB_BC_SECONDARY_RESET); 411 delay(10 * 1000); /* 10ms enough? */ 412 bus_space_write_4(&obio_bs_tag, 413 I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL, 414 reg); 415 } 416 417 /* 418 * We are currently running with the MMU enabled and the 419 * entire address space mapped VA==PA, except for the 420 * first 64M of RAM is also double-mapped at 0xc0000000. 421 * There is an L1 page table at 0xa0004000. 422 */ 423 424 /* 425 * Fetch the SDRAM start/size from the i80312 SDRAM configration 426 * registers. 427 */ 428 i80312_sdram_bounds(&obio_bs_tag, I80312_PMMR_BASE + I80312_MEM_BASE, 429 &memstart, &memsize); 430 431 #ifdef VERBOSE_INIT_ARM 432 printf("initarm: Configuring system ...\n"); 433 #endif 434 435 /* Fake bootconfig structure for the benefit of pmap.c */ 436 /* XXX must make the memory description h/w independant */ 437 bootconfig.dramblocks = 1; 438 bootconfig.dram[0].address = memstart; 439 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 440 441 /* 442 * Set up the variables that define the availablilty of 443 * physical memory. For now, we're going to set 444 * physical_freestart to 0xa0200000 (where the kernel 445 * was loaded), and allocate the memory we need downwards. 446 * If we get too close to the L1 table that we set up, we 447 * will panic. We will update physical_freestart and 448 * physical_freeend later to reflect what pmap_bootstrap() 449 * wants to see. 450 * 451 * XXX pmap_bootstrap() needs an enema. 452 */ 453 physical_start = bootconfig.dram[0].address; 454 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 455 456 physical_freestart = 0xa0009000UL; 457 physical_freeend = 0xa0200000UL; 458 459 physmem = (physical_end - physical_start) / PAGE_SIZE; 460 461 #ifdef VERBOSE_INIT_ARM 462 /* Tell the user about the memory */ 463 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 464 physical_start, physical_end - 1); 465 #endif 466 467 /* 468 * Okay, the kernel starts 2MB in from the bottom of physical 469 * memory. We are going to allocate our bootstrap pages downwards 470 * from there. 471 * 472 * We need to allocate some fixed page tables to get the kernel 473 * going. We allocate one page directory and a number of page 474 * tables and store the physical addresses in the kernel_pt_table 475 * array. 476 * 477 * The kernel page directory must be on a 16K boundary. The page 478 * tables must be on 4K bounaries. What we do is allocate the 479 * page directory on the first 16K boundary that we encounter, and 480 * the page tables on 4K boundaries otherwise. Since we allocate 481 * at least 3 L2 page tables, we are guaranteed to encounter at 482 * least one 16K aligned region. 483 */ 484 485 #ifdef VERBOSE_INIT_ARM 486 printf("Allocating page tables\n"); 487 #endif 488 489 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 490 491 #ifdef VERBOSE_INIT_ARM 492 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 493 physical_freestart, free_pages, free_pages); 494 #endif 495 496 /* Define a macro to simplify memory allocation */ 497 #define valloc_pages(var, np) \ 498 alloc_pages((var).pv_pa, (np)); \ 499 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 500 501 #define alloc_pages(var, np) \ 502 physical_freeend -= ((np) * PAGE_SIZE); \ 503 if (physical_freeend < physical_freestart) \ 504 panic("initarm: out of memory"); \ 505 (var) = physical_freeend; \ 506 free_pages -= (np); \ 507 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 508 509 loop1 = 0; 510 kernel_l1pt.pv_pa = 0; 511 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 512 /* Are we 16KB aligned for an L1 ? */ 513 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 514 && kernel_l1pt.pv_pa == 0) { 515 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 516 } else { 517 valloc_pages(kernel_pt_table[loop1], 518 L2_TABLE_SIZE / PAGE_SIZE); 519 ++loop1; 520 } 521 } 522 523 /* This should never be able to happen but better confirm that. */ 524 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 525 panic("initarm: Failed to align the kernel page directory"); 526 527 /* 528 * Allocate a page for the system page mapped to V0x00000000 529 * This page will just contain the system vectors and can be 530 * shared by all processes. 531 */ 532 alloc_pages(systempage.pv_pa, 1); 533 534 /* Allocate stacks for all modes */ 535 valloc_pages(irqstack, IRQ_STACK_SIZE); 536 valloc_pages(abtstack, ABT_STACK_SIZE); 537 valloc_pages(undstack, UND_STACK_SIZE); 538 valloc_pages(kernelstack, UPAGES); 539 540 /* Allocate enough pages for cleaning the Mini-Data cache. */ 541 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 542 valloc_pages(minidataclean, 1); 543 544 #ifdef VERBOSE_INIT_ARM 545 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 546 irqstack.pv_va); 547 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 548 abtstack.pv_va); 549 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 550 undstack.pv_va); 551 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 552 kernelstack.pv_va); 553 #endif 554 555 /* 556 * XXX Defer this to later so that we can reclaim the memory 557 * XXX used by the RedBoot page tables. 558 */ 559 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 560 561 /* 562 * Ok we have allocated physical pages for the primary kernel 563 * page tables 564 */ 565 566 #ifdef VERBOSE_INIT_ARM 567 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 568 #endif 569 570 /* 571 * Now we start construction of the L1 page table 572 * We start by mapping the L2 page tables into the L1. 573 * This means that we can replace L1 mappings later on if necessary 574 */ 575 l1pagetable = kernel_l1pt.pv_pa; 576 577 /* Map the L2 pages tables in the L1 page table */ 578 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 579 &kernel_pt_table[KERNEL_PT_SYS]); 580 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 581 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 582 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 583 pmap_link_l2pt(l1pagetable, IQ80310_IOPXS_VBASE, 584 &kernel_pt_table[KERNEL_PT_IOPXS]); 585 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 586 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 587 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 588 589 /* update the top of the kernel VM */ 590 pmap_curmaxkvaddr = 591 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 592 593 #ifdef VERBOSE_INIT_ARM 594 printf("Mapping kernel\n"); 595 #endif 596 597 /* Now we fill in the L2 pagetable for the kernel static code/data */ 598 { 599 extern char etext[], _end[]; 600 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 601 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 602 u_int logical; 603 604 textsize = (textsize + PGOFSET) & ~PGOFSET; 605 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 606 607 logical = 0x00200000; /* offset of kernel in RAM */ 608 609 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 610 physical_start + logical, textsize, 611 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 612 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 613 physical_start + logical, totalsize - textsize, 614 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 615 } 616 617 #ifdef VERBOSE_INIT_ARM 618 printf("Constructing L2 page tables\n"); 619 #endif 620 621 /* Map the stack pages */ 622 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 623 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 624 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 625 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 626 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 627 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 628 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 629 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 630 631 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 632 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 633 634 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 635 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 636 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 637 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 638 } 639 640 /* Map the Mini-Data cache clean area. */ 641 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 642 minidataclean.pv_pa); 643 644 /* Map the vector page. */ 645 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 646 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 647 648 /* Map the statically mapped devices. */ 649 pmap_devmap_bootstrap(l1pagetable, iq80310_devmap); 650 651 /* 652 * Give the XScale global cache clean code an appropriately 653 * sized chunk of unmapped VA space starting at 0xff000000 654 * (our device mappings end before this address). 655 */ 656 xscale_cache_clean_addr = 0xff000000U; 657 658 /* 659 * Now we have the real page tables in place so we can switch to them. 660 * Once this is done we will be running with the REAL kernel page 661 * tables. 662 */ 663 664 /* 665 * Update the physical_freestart/physical_freeend/free_pages 666 * variables. 667 */ 668 { 669 extern char _end[]; 670 671 physical_freestart = physical_start + 672 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 673 KERNEL_BASE); 674 physical_freeend = physical_end; 675 free_pages = 676 (physical_freeend - physical_freestart) / PAGE_SIZE; 677 } 678 679 /* Switch tables */ 680 #ifdef VERBOSE_INIT_ARM 681 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 682 physical_freestart, free_pages, free_pages); 683 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 684 #endif 685 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 686 setttb(kernel_l1pt.pv_pa); 687 cpu_tlb_flushID(); 688 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 689 690 /* 691 * Moved from cpu_startup() as data_abort_handler() references 692 * this during uvm init 693 */ 694 proc0paddr = (struct user *)kernelstack.pv_va; 695 lwp0.l_addr = proc0paddr; 696 697 #ifdef VERBOSE_INIT_ARM 698 printf("done!\n"); 699 #endif 700 701 #ifdef VERBOSE_INIT_ARM 702 printf("bootstrap done.\n"); 703 #endif 704 705 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 706 707 /* 708 * Pages were allocated during the secondary bootstrap for the 709 * stacks for different CPU modes. 710 * We must now set the r13 registers in the different CPU modes to 711 * point to these stacks. 712 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 713 * of the stack memory. 714 */ 715 #ifdef VERBOSE_INIT_ARM 716 printf("init subsystems: stacks "); 717 #endif 718 719 set_stackptr(PSR_IRQ32_MODE, 720 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 721 set_stackptr(PSR_ABT32_MODE, 722 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 723 set_stackptr(PSR_UND32_MODE, 724 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 725 726 /* 727 * Well we should set a data abort handler. 728 * Once things get going this will change as we will need a proper 729 * handler. 730 * Until then we will use a handler that just panics but tells us 731 * why. 732 * Initialisation of the vectors will just panic on a data abort. 733 * This just fills in a slighly better one. 734 */ 735 #ifdef VERBOSE_INIT_ARM 736 printf("vectors "); 737 #endif 738 data_abort_handler_address = (u_int)data_abort_handler; 739 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 740 undefined_handler_address = (u_int)undefinedinstruction_bounce; 741 742 /* Initialise the undefined instruction handlers */ 743 #ifdef VERBOSE_INIT_ARM 744 printf("undefined "); 745 #endif 746 undefined_init(); 747 748 /* Load memory into UVM. */ 749 #ifdef VERBOSE_INIT_ARM 750 printf("page "); 751 #endif 752 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 753 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 754 atop(physical_freestart), atop(physical_freeend), 755 VM_FREELIST_DEFAULT); 756 757 /* Boot strap pmap telling it where the kernel page table is */ 758 #ifdef VERBOSE_INIT_ARM 759 printf("pmap "); 760 #endif 761 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 762 KERNEL_VM_BASE + KERNEL_VM_SIZE); 763 764 /* Setup the IRQ system */ 765 #ifdef VERBOSE_INIT_ARM 766 printf("irq "); 767 #endif 768 iq80310_intr_init(); 769 770 #ifdef VERBOSE_INIT_ARM 771 printf("done.\n"); 772 #endif 773 774 #ifdef IPKDB 775 /* Initialise ipkdb */ 776 ipkdb_init(); 777 if (boothowto & RB_KDB) 778 ipkdb_connect(0); 779 #endif 780 781 #if NKSYMS || defined(DDB) || defined(LKM) 782 /* Firmware doesn't load symbols. */ 783 ksyms_init(0, NULL, NULL); 784 #endif 785 786 #ifdef DDB 787 db_machine_init(); 788 if (boothowto & RB_KDB) 789 Debugger(); 790 #endif 791 792 /* We return the new stack pointer address */ 793 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 794 } 795 796 void 797 consinit(void) 798 { 799 static const bus_addr_t comcnaddrs[] = { 800 IQ80310_UART2, /* com0 (J9) */ 801 IQ80310_UART1, /* com1 (J10) */ 802 }; 803 static int consinit_called; 804 805 if (consinit_called != 0) 806 return; 807 808 consinit_called = 1; 809 810 /* 811 * Console devices are mapped VA==PA. Our devmap reflects 812 * this, so register it now so drivers can map the console 813 * device. 814 */ 815 pmap_devmap_register(iq80310_devmap); 816 817 #if NCOM > 0 818 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 819 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 820 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 821 #else 822 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 823 #endif 824 } 825
Indexes created Mon Oct 20 05:10:11 GMT 2025