iq80310_machdep.c revision 1.16
1 /* $NetBSD: iq80310_machdep.c,v 1.16 2002/01/20 03:41:48 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 2001, 2002 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 "opt_ddb.h" 76 #include "opt_pmap_debug.h" 77 78 #include <sys/param.h> 79 #include <sys/device.h> 80 #include <sys/systm.h> 81 #include <sys/kernel.h> 82 #include <sys/exec.h> 83 #include <sys/proc.h> 84 #include <sys/msgbuf.h> 85 #include <sys/reboot.h> 86 #include <sys/termios.h> 87 88 #include <dev/cons.h> 89 90 #include <machine/db_machdep.h> 91 #include <ddb/db_sym.h> 92 #include <ddb/db_extern.h> 93 94 #include <machine/bootconfig.h> 95 #include <machine/bus.h> 96 #include <machine/cpu.h> 97 #include <machine/frame.h> 98 #include <arm/undefined.h> 99 100 #include <arm/arm32/machdep.h> 101 102 #include <arm/xscale/i80312reg.h> 103 #include <arm/xscale/i80312var.h> 104 105 #include <dev/pci/ppbreg.h> 106 107 #include <evbarm/iq80310/iq80310reg.h> 108 #include <evbarm/iq80310/iq80310var.h> 109 #include <evbarm/iq80310/obiovar.h> 110 111 #include "opt_ipkdb.h" 112 113 /* 114 * Address to call from cpu_reset() to reset the machine. 115 * This is machine architecture dependant as it varies depending 116 * on where the ROM appears when you turn the MMU off. 117 */ 118 119 u_int cpu_reset_address = 0; 120 121 /* Define various stack sizes in pages */ 122 #define IRQ_STACK_SIZE 1 123 #define ABT_STACK_SIZE 1 124 #ifdef IPKDB 125 #define UND_STACK_SIZE 2 126 #else 127 #define UND_STACK_SIZE 1 128 #endif 129 130 BootConfig bootconfig; /* Boot config storage */ 131 char *boot_args = NULL; 132 char *boot_file = NULL; 133 134 vm_offset_t physical_start; 135 vm_offset_t physical_freestart; 136 vm_offset_t physical_freeend; 137 vm_offset_t physical_end; 138 u_int free_pages; 139 vm_offset_t pagetables_start; 140 int physmem = 0; 141 142 /*int debug_flags;*/ 143 #ifndef PMAP_STATIC_L1S 144 int max_processes = 64; /* Default number */ 145 #endif /* !PMAP_STATIC_L1S */ 146 147 /* Physical and virtual addresses for some global pages */ 148 pv_addr_t systempage; 149 pv_addr_t irqstack; 150 pv_addr_t undstack; 151 pv_addr_t abtstack; 152 pv_addr_t kernelstack; 153 pv_addr_t minidataclean; 154 155 vm_offset_t msgbufphys; 156 157 extern u_int data_abort_handler_address; 158 extern u_int prefetch_abort_handler_address; 159 extern u_int undefined_handler_address; 160 161 #ifdef PMAP_DEBUG 162 extern int pmap_debug_level; 163 #endif 164 165 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 166 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */ 167 #define KERNEL_PT_IOPXS 2 /* Page table for mapping i80312 */ 168 #define KERNEL_PT_VMDATA 3 /* Page tables for mapping kernel VM */ 169 #define KERNEL_PT_VMDATA_NUM (KERNEL_VM_SIZE >> (PDSHIFT + 2)) 170 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 171 172 pt_entry_t kernel_pt_table[NUM_KERNEL_PTS]; 173 174 struct user *proc0paddr; 175 176 /* Prototypes */ 177 178 void consinit(void); 179 180 #include "com.h" 181 #if NCOM > 0 182 #include <dev/ic/comreg.h> 183 #include <dev/ic/comvar.h> 184 #endif 185 186 #ifndef CONSPEED 187 #define CONSPEED B115200 /* What RedBoot uses */ 188 #endif 189 #ifndef CONMODE 190 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 191 #endif 192 #ifndef CONUNIT 193 #define CONUNIT 0 194 #endif 195 196 int comcnspeed = CONSPEED; 197 int comcnmode = CONMODE; 198 int comcnunit = CONUNIT; 199 200 /* 201 * void cpu_reboot(int howto, char *bootstr) 202 * 203 * Reboots the system 204 * 205 * Deal with any syncing, unmounting, dumping and shutdown hooks, 206 * then reset the CPU. 207 */ 208 void 209 cpu_reboot(int howto, char *bootstr) 210 { 211 #ifdef DIAGNOSTIC 212 /* info */ 213 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 214 #endif 215 216 /* 217 * If we are still cold then hit the air brakes 218 * and crash to earth fast 219 */ 220 if (cold) { 221 doshutdownhooks(); 222 printf("The operating system has halted.\n"); 223 printf("Please press any key to reboot.\n\n"); 224 cngetc(); 225 printf("rebooting...\n"); 226 cpu_reset(); 227 /*NOTREACHED*/ 228 } 229 230 /* Disable console buffering */ 231 232 /* 233 * If RB_NOSYNC was not specified sync the discs. 234 * Note: Unless cold is set to 1 here, syslogd will die during the 235 * unmount. It looks like syslogd is getting woken up only to find 236 * that it cannot page part of the binary in as the filesystem has 237 * been unmounted. 238 */ 239 if (!(howto & RB_NOSYNC)) 240 bootsync(); 241 242 /* Say NO to interrupts */ 243 splhigh(); 244 245 /* Do a dump if requested. */ 246 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 247 dumpsys(); 248 249 /* Run any shutdown hooks */ 250 doshutdownhooks(); 251 252 /* Make sure IRQ's are disabled */ 253 IRQdisable; 254 255 if (howto & RB_HALT) { 256 printf("The operating system has halted.\n"); 257 printf("Please press any key to reboot.\n\n"); 258 cngetc(); 259 } 260 261 printf("rebooting...\n"); 262 cpu_reset(); 263 /*NOTREACHED*/ 264 } 265 266 /* 267 * Mapping table for core kernel memory. This memory is mapped at init 268 * time with section mappings. 269 */ 270 struct l1_sec_map { 271 vaddr_t va; 272 vaddr_t pa; 273 vsize_t size; 274 int flags; 275 } l1_sec_table[] = { 276 /* 277 * Map the on-board devices VA == PA so that we can access them 278 * with the MMU on or off. 279 */ 280 { 281 IQ80310_OBIO_BASE, 282 IQ80310_OBIO_BASE, 283 IQ80310_OBIO_SIZE, 284 0, 285 }, 286 287 { 288 0, 289 0, 290 0, 291 0, 292 } 293 }; 294 295 /* 296 * u_int initarm(...) 297 * 298 * Initial entry point on startup. This gets called before main() is 299 * entered. 300 * It should be responsible for setting up everything that must be 301 * in place when main is called. 302 * This includes 303 * Taking a copy of the boot configuration structure. 304 * Initialising the physical console so characters can be printed. 305 * Setting up page tables for the kernel 306 * Relocating the kernel to the bottom of physical memory 307 */ 308 u_int 309 initarm(void *arg) 310 { 311 extern vaddr_t xscale_cache_clean_addr, xscale_minidata_clean_addr; 312 extern vsize_t xscale_minidata_clean_size; 313 int loop; 314 int loop1; 315 u_int l1pagetable; 316 u_int l2pagetable; 317 extern char page0[], page0_end[]; 318 pv_addr_t kernel_l1pt; 319 pv_addr_t kernel_ptpt; 320 paddr_t memstart; 321 psize_t memsize; 322 323 /* 324 * Clear out the 7-segment display. Whee, the first visual 325 * indication that we're running kernel code. 326 */ 327 iq80310_7seg(' ', ' '); 328 329 /* 330 * Heads up ... Setup the CPU / MMU / TLB functions 331 */ 332 if (set_cpufuncs()) 333 panic("cpu not recognized!"); 334 335 /* Calibrate the delay loop. */ 336 iq80310_calibrate_delay(); 337 338 /* 339 * Since we map the on-board devices VA==PA, and the kernel 340 * is running VA==PA, it's possible for us to initialize 341 * the console now. 342 */ 343 consinit(); 344 345 /* Talk to the user */ 346 printf("\nNetBSD/evbarm (IQ80310) booting ...\n"); 347 348 /* 349 * Reset the secondary PCI bus. RedBoot doesn't stop devices 350 * on the PCI bus before handing us control, so we have to 351 * do this. 352 * 353 * XXX This is arguably a bug in RedBoot, and doing this reset 354 * XXX could be problematic in the future if we encounter an 355 * XXX application where the PPB in the i80312 is used as a 356 * XXX PPB. 357 */ 358 { 359 uint32_t reg; 360 361 printf("Resetting secondary PCI bus...\n"); 362 reg = bus_space_read_4(&obio_bs_tag, 363 I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL); 364 bus_space_write_4(&obio_bs_tag, 365 I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL, 366 reg | PPB_BC_SECONDARY_RESET); 367 delay(10 * 1000); /* 10ms enough? */ 368 bus_space_write_4(&obio_bs_tag, 369 I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL, 370 reg); 371 } 372 373 /* 374 * Okay, RedBoot has provided us with the following memory map: 375 * 376 * Physical Address Range Description 377 * ----------------------- ---------------------------------- 378 * 0x00000000 - 0x00000fff flash Memory 379 * 0x00001000 - 0x00001fff 80312 Internal Registers 380 * 0x00002000 - 0x007fffff flash Memory 381 * 0x00800000 - 0x7fffffff PCI ATU Outbound Direct Window 382 * 0x80000000 - 0x83ffffff Primary PCI 32-bit Memory 383 * 0x84000000 - 0x87ffffff Primary PCI 64-bit Memory 384 * 0x88000000 - 0x8bffffff Secondary PCI 32-bit Memory 385 * 0x8c000000 - 0x8fffffff Secondary PCI 64-bit Memory 386 * 0x90000000 - 0x9000ffff Primary PCI IO Space 387 * 0x90010000 - 0x9001ffff Secondary PCI IO Space 388 * 0x90020000 - 0x9fffffff Unused 389 * 0xa0000000 - 0xbfffffff SDRAM 390 * 0xc0000000 - 0xefffffff Unused 391 * 0xf0000000 - 0xffffffff 80200 Internal Registers 392 * 393 * 394 * Virtual Address Range C B Description 395 * ----------------------- - - ---------------------------------- 396 * 0x00000000 - 0x00000fff Y Y SDRAM 397 * 0x00001000 - 0x00001fff N N 80312 Internal Registers 398 * 0x00002000 - 0x007fffff Y N flash Memory 399 * 0x00800000 - 0x7fffffff N N PCI ATU Outbound Direct Window 400 * 0x80000000 - 0x83ffffff N N Primary PCI 32-bit Memory 401 * 0x84000000 - 0x87ffffff N N Primary PCI 64-bit Memory 402 * 0x88000000 - 0x8bffffff N N Secondary PCI 32-bit Memory 403 * 0x8c000000 - 0x8fffffff N N Secondary PCI 64-bit Memory 404 * 0x90000000 - 0x9000ffff N N Primary PCI IO Space 405 * 0x90010000 - 0x9001ffff N N Secondary PCI IO Space 406 * 0xa0000000 - 0xa0000fff Y N flash 407 * 0xa0001000 - 0xbfffffff Y Y SDRAM 408 * 0xc0000000 - 0xcfffffff Y Y Cache Flush Region 409 * 0xf0000000 - 0xffffffff N N 80200 Internal Registers 410 * 411 * The first level page table is at 0xa0004000. There are also 412 * 2 second-level tables at 0xa0008000 and 0xa0008400. 413 * 414 * This corresponds roughly to the physical memory map, i.e. 415 * we are quite nearly running VA==PA. 416 */ 417 418 /* 419 * Examine the boot args string for options we need to know about 420 * now. 421 */ 422 #if 0 423 process_kernel_args((char *)nwbootinfo.bt_args); 424 #endif 425 426 /* 427 * Fetch the SDRAM start/size from the i80312 SDRAM configration 428 * registers. 429 */ 430 i80312_sdram_bounds(&obio_bs_tag, I80312_PMMR_BASE + I80312_MEM_BASE, 431 &memstart, &memsize); 432 433 printf("initarm: Configuring system ...\n"); 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 / NBPG; 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 page tables that RedBoot 447 * set up, we will panic. We will update physical_freestart 448 * and 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 * NBPG); 455 456 physical_freestart = 0xa0009000UL; 457 physical_freeend = 0xa0200000UL; 458 459 physmem = (physical_end - physical_start) / NBPG; 460 461 /* Tell the user about the memory */ 462 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 463 physical_start, physical_end - 1); 464 465 /* 466 * Okay, the kernel starts 2MB in from the bottom of physical 467 * memory. We are going to allocate our bootstrap pages downwards 468 * from there. 469 * 470 * We need to allocate some fixed page tables to get the kernel 471 * going. We allocate one page directory and a number of page 472 * tables and store the physical addresses in the kernel_pt_table 473 * array. 474 * 475 * The kernel page directory must be on a 16K boundary. The page 476 * tables must be on 4K bounaries. What we do is allocate the 477 * page directory on the first 16K boundary that we encounter, and 478 * the page tables on 4K boundaries otherwise. Since we allocate 479 * at least 3 L2 page tables, we are guaranteed to encounter at 480 * least one 16K aligned region. 481 */ 482 483 #ifdef VERBOSE_INIT_ARM 484 printf("Allocating page tables\n"); 485 #endif 486 487 free_pages = (physical_freeend - physical_freestart) / NBPG; 488 489 #ifdef VERBOSE_INIT_ARM 490 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 491 physical_freestart, free_pages, free_pages); 492 #endif 493 494 /* Define a macro to simplify memory allocation */ 495 #define valloc_pages(var, np) \ 496 alloc_pages((var).pv_pa, (np)); \ 497 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 498 499 #define alloc_pages(var, np) \ 500 physical_freeend -= ((np) * NBPG); \ 501 if (physical_freeend < physical_freestart) \ 502 panic("initarm: out of memory"); \ 503 (var) = physical_freeend; \ 504 free_pages -= (np); \ 505 memset((char *)(var), 0, ((np) * NBPG)); 506 507 loop1 = 0; 508 kernel_l1pt.pv_pa = 0; 509 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 510 /* Are we 16KB aligned for an L1 ? */ 511 if (((physical_freeend - PD_SIZE) & (PD_SIZE - 1)) == 0 512 && kernel_l1pt.pv_pa == 0) { 513 valloc_pages(kernel_l1pt, PD_SIZE / NBPG); 514 } else { 515 alloc_pages(kernel_pt_table[loop1], PT_SIZE / NBPG); 516 ++loop1; 517 } 518 } 519 520 /* This should never be able to happen but better confirm that. */ 521 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (PD_SIZE-1)) != 0) 522 panic("initarm: Failed to align the kernel page directory\n"); 523 524 /* 525 * Allocate a page for the system page mapped to V0x00000000 526 * This page will just contain the system vectors and can be 527 * shared by all processes. 528 */ 529 alloc_pages(systempage.pv_pa, 1); 530 531 /* Allocate a page for the page table to map kernel page tables. */ 532 valloc_pages(kernel_ptpt, PT_SIZE / NBPG); 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 <= NBPG); 542 valloc_pages(minidataclean, 1); 543 xscale_minidata_clean_addr = minidataclean.pv_va; 544 545 #ifdef VERBOSE_INIT_ARM 546 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 547 irqstack.pv_va); 548 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 549 abtstack.pv_va); 550 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 551 undstack.pv_va); 552 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 553 kernelstack.pv_va); 554 #endif 555 556 /* 557 * XXX Defer this to later so that we can reclaim the memory 558 * XXX used by the RedBoot page tables. 559 */ 560 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / NBPG); 561 562 /* 563 * Ok we have allocated physical pages for the primary kernel 564 * page tables 565 */ 566 567 #ifdef VERBOSE_INIT_ARM 568 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 569 #endif 570 571 /* 572 * Now we start consturction of the L1 page table 573 * We start by mapping the L2 page tables into the L1. 574 * This means that we can replace L1 mappings later on if necessary 575 */ 576 l1pagetable = kernel_l1pt.pv_pa; 577 578 /* Map the L2 pages tables in the L1 page table */ 579 map_pagetable(l1pagetable, 0x00000000, 580 kernel_pt_table[KERNEL_PT_SYS]); 581 map_pagetable(l1pagetable, KERNEL_BASE, 582 kernel_pt_table[KERNEL_PT_KERNEL]); 583 map_pagetable(l1pagetable, IQ80310_IOPXS_VBASE, 584 kernel_pt_table[KERNEL_PT_IOPXS]); 585 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 586 map_pagetable(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 587 kernel_pt_table[KERNEL_PT_VMDATA + loop]); 588 map_pagetable(l1pagetable, PROCESS_PAGE_TBLS_BASE, 589 kernel_ptpt.pv_pa); 590 591 #ifdef VERBOSE_INIT_ARM 592 printf("Mapping kernel\n"); 593 #endif 594 595 /* Now we fill in the L2 pagetable for the kernel static code/data */ 596 l2pagetable = kernel_pt_table[KERNEL_PT_KERNEL]; 597 598 { 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 /* 610 * This maps the kernel text/data/bss VA==PA. 611 */ 612 logical += map_chunk(l1pagetable, l2pagetable, 613 KERNEL_BASE + logical, 614 physical_start + logical, textsize, 615 AP_KRW, PT_CACHEABLE); 616 logical += map_chunk(l1pagetable, l2pagetable, 617 KERNEL_BASE + logical, 618 physical_start + logical, totalsize - textsize, 619 AP_KRW, PT_CACHEABLE); 620 621 #if 0 /* XXX No symbols yet. */ 622 logical += map_chunk(l1pagetable, l2pagetable, 623 KERNEL_BASE + logical, 624 physical_start + logical, kernexec->a_syms + sizeof(int) 625 + *(u_int *)((int)end + kernexec->a_syms + sizeof(int)), 626 AP_KRW, PT_CACHEABLE); 627 #endif 628 } 629 630 #ifdef VERBOSE_INIT_ARM 631 printf("Constructing L2 page tables\n"); 632 #endif 633 634 /* Map the stack pages */ 635 map_chunk(0, l2pagetable, irqstack.pv_va, irqstack.pv_pa, 636 IRQ_STACK_SIZE * NBPG, AP_KRW, PT_CACHEABLE); 637 map_chunk(0, l2pagetable, abtstack.pv_va, abtstack.pv_pa, 638 ABT_STACK_SIZE * NBPG, AP_KRW, PT_CACHEABLE); 639 map_chunk(0, l2pagetable, undstack.pv_va, undstack.pv_pa, 640 UND_STACK_SIZE * NBPG, AP_KRW, PT_CACHEABLE); 641 map_chunk(0, l2pagetable, kernelstack.pv_va, kernelstack.pv_pa, 642 UPAGES * NBPG, AP_KRW, PT_CACHEABLE); 643 map_chunk(0, l2pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 644 PD_SIZE, AP_KRW, 0); 645 646 /* Map the Mini-Data cache clean area. */ 647 map_chunk(0, l2pagetable, minidataclean.pv_va, minidataclean.pv_pa, 648 NBPG, AP_KRW, PT_CACHEABLE); 649 650 /* Map the page table that maps the kernel pages */ 651 map_entry_nc(l2pagetable, kernel_ptpt.pv_pa, kernel_ptpt.pv_pa); 652 653 /* 654 * Map entries in the page table used to map PTE's 655 * Basically every kernel page table gets mapped here 656 */ 657 /* The -2 is slightly bogus, it should be -log2(sizeof(pt_entry_t)) */ 658 l2pagetable = kernel_ptpt.pv_pa; 659 map_entry_nc(l2pagetable, (KERNEL_BASE >> (PGSHIFT-2)), 660 kernel_pt_table[KERNEL_PT_KERNEL]); 661 map_entry_nc(l2pagetable, (PROCESS_PAGE_TBLS_BASE >> (PGSHIFT-2)), 662 kernel_ptpt.pv_pa); 663 map_entry_nc(l2pagetable, (0x00000000 >> (PGSHIFT-2)), 664 kernel_pt_table[KERNEL_PT_SYS]); 665 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 666 map_entry_nc(l2pagetable, ((KERNEL_VM_BASE + 667 (loop * 0x00400000)) >> (PGSHIFT-2)), 668 kernel_pt_table[KERNEL_PT_VMDATA + loop]); 669 670 /* 671 * Map the system page in the kernel page table for the bottom 1Meg 672 * of the virtual memory map. 673 */ 674 l2pagetable = kernel_pt_table[KERNEL_PT_SYS]; 675 map_entry(l2pagetable, 0x00000000, systempage.pv_pa); 676 677 /* 678 * Map devices we can map w/ section mappings. 679 */ 680 loop = 0; 681 while (l1_sec_table[loop].size) { 682 vm_size_t sz; 683 684 #ifdef VERBOSE_INIT_ARM 685 printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa, 686 l1_sec_table[loop].pa + l1_sec_table[loop].size - 1, 687 l1_sec_table[loop].va); 688 #endif 689 for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_SEC_SIZE) 690 map_section(l1pagetable, l1_sec_table[loop].va + sz, 691 l1_sec_table[loop].pa + sz, 692 l1_sec_table[loop].flags); 693 ++loop; 694 } 695 696 /* 697 * Map the PCI I/O spaces and i80312 registers. These are too 698 * small to be mapped w/ section mappings. 699 */ 700 l2pagetable = kernel_pt_table[KERNEL_PT_IOPXS]; 701 #ifdef VERBOSE_INIT_ARM 702 printf("Mapping PIOW 0x%08lx -> 0x%08lx @ 0x%08lx\n", 703 I80312_PCI_XLATE_PIOW_BASE, 704 I80312_PCI_XLATE_PIOW_BASE + I80312_PCI_XLATE_IOSIZE - 1, 705 IQ80310_PIOW_VBASE); 706 #endif 707 map_chunk(0, l2pagetable, IQ80310_PIOW_VBASE, 708 I80312_PCI_XLATE_PIOW_BASE, I80312_PCI_XLATE_IOSIZE, AP_KRW, 0); 709 710 #ifdef VERBOSE_INIT_ARM 711 printf("Mapping SIOW 0x%08lx -> 0x%08lx @ 0x%08lx\n", 712 I80312_PCI_XLATE_SIOW_BASE, 713 I80312_PCI_XLATE_SIOW_BASE + I80312_PCI_XLATE_IOSIZE - 1, 714 IQ80310_SIOW_VBASE); 715 #endif 716 map_chunk(0, l2pagetable, IQ80310_SIOW_VBASE, 717 I80312_PCI_XLATE_SIOW_BASE, I80312_PCI_XLATE_IOSIZE, AP_KRW, 0); 718 719 #ifdef VERBOSE_INIT_ARM 720 printf("Mapping 80312 0x%08lx -> 0x%08lx @ 0x%08lx\n", 721 I80312_PMMR_BASE, 722 I80312_PMMR_BASE + I80312_PMMR_SIZE - 1, 723 IQ80310_80312_VBASE); 724 #endif 725 map_chunk(0, l2pagetable, IQ80310_80312_VBASE, 726 I80312_PMMR_BASE, I80312_PMMR_SIZE, AP_KRW, 0); 727 728 /* 729 * Give the XScale global cache clean code an appropriately 730 * sized chunk of unmapped VA space starting at 0xff000000 731 * (our device mappings end before this address). 732 */ 733 xscale_cache_clean_addr = 0xff000000U; 734 735 /* 736 * Now we have the real page tables in place so we can switch to them. 737 * Once this is done we will be running with the REAL kernel page 738 * tables. 739 */ 740 741 /* 742 * Update the physical_freestart/physical_freeend/free_pages 743 * variables. 744 */ 745 { 746 extern char _end[]; 747 748 physical_freestart = (((uintptr_t) _end) + PGOFSET) & ~PGOFSET; 749 physical_freeend = physical_end; 750 free_pages = (physical_freeend - physical_freestart) / NBPG; 751 } 752 753 /* Switch tables */ 754 #ifdef VERBOSE_INIT_ARM 755 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 756 physical_freestart, free_pages, free_pages); 757 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 758 #endif 759 setttb(kernel_l1pt.pv_pa); 760 761 #ifdef VERBOSE_INIT_ARM 762 printf("done!\n"); 763 #endif 764 765 #ifdef VERBOSE_INIT_ARM 766 printf("bootstrap done.\n"); 767 #endif 768 769 /* Right, set up the vectors at the bottom of page 0 */ 770 memcpy((char *)0x00000000, page0, page0_end - page0); 771 772 /* We have modified a text page so sync the icache */ 773 cpu_cache_syncI(); 774 775 /* 776 * Pages were allocated during the secondary bootstrap for the 777 * stacks for different CPU modes. 778 * We must now set the r13 registers in the different CPU modes to 779 * point to these stacks. 780 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 781 * of the stack memory. 782 */ 783 printf("init subsystems: stacks "); 784 785 set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * NBPG); 786 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * NBPG); 787 set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * NBPG); 788 789 /* 790 * Well we should set a data abort handler. 791 * Once things get going this will change as we will need a proper 792 * handler. 793 * Until then we will use a handler that just panics but tells us 794 * why. 795 * Initialisation of the vectors will just panic on a data abort. 796 * This just fills in a slighly better one. 797 */ 798 printf("vectors "); 799 data_abort_handler_address = (u_int)data_abort_handler; 800 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 801 undefined_handler_address = (u_int)undefinedinstruction_bounce; 802 803 /* At last ! 804 * We now have the kernel in physical memory from the bottom upwards. 805 * Kernel page tables are physically above this. 806 * The kernel is mapped to KERNEL_TEXT_BASE 807 * The kernel data PTs will handle the mapping of 0xf1000000-0xf3ffffff 808 * The page tables are mapped to 0xefc00000 809 */ 810 811 /* Initialise the undefined instruction handlers */ 812 printf("undefined "); 813 undefined_init(); 814 815 /* Boot strap pmap telling it where the kernel page table is */ 816 printf("pmap "); 817 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, kernel_ptpt); 818 819 /* Setup the IRQ system */ 820 printf("irq "); 821 irq_init(); 822 printf("done.\n"); 823 824 #ifdef IPKDB 825 /* Initialise ipkdb */ 826 ipkdb_init(); 827 if (boothowto & RB_KDB) 828 ipkdb_connect(0); 829 #endif 830 831 #ifdef DDB 832 db_machine_init(); 833 834 /* Firmware doesn't load symbols. */ 835 ddb_init(0, NULL, NULL); 836 837 if (boothowto & RB_KDB) 838 Debugger(); 839 #endif 840 841 /* We return the new stack pointer address */ 842 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 843 } 844 845 #if 0 846 void 847 process_kernel_args(char *args) 848 { 849 static char bootargs[MAX_BOOT_STRING + 1]; 850 851 boothowto = 0; 852 853 /* Make a local copy of the bootargs */ 854 strncpy(bootargs, args, MAX_BOOT_STRING); 855 856 args = bootargs; 857 boot_file = bootargs; 858 859 /* Skip the kernel image filename */ 860 while (*args != ' ' && *args != 0) 861 ++args; 862 863 if (*args != 0) 864 *args++ = 0; 865 866 while (*args == ' ') 867 ++args; 868 869 boot_args = args; 870 871 printf("bootfile: %s\n", boot_file); 872 printf("bootargs: %s\n", boot_args); 873 874 parse_mi_bootargs(boot_args); 875 } 876 #endif 877 878 void 879 consinit(void) 880 { 881 static const bus_addr_t comcnaddrs[] = { 882 IQ80310_UART2, /* com0 (J9) */ 883 IQ80310_UART1, /* com1 (J10) */ 884 }; 885 static int consinit_called; 886 887 if (consinit_called != 0) 888 return; 889 890 consinit_called = 1; 891 892 #if NCOM > 0 893 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 894 COM_FREQ, comcnmode)) 895 panic("can't init serial console @%lx", IQ80310_UART2); 896 #else 897 panic("serial console @%lx not configured", IQ80310_UART2); 898 #endif 899 } 900
Indexes created Wed Oct 22 13:09:56 GMT 2025