iq80310_machdep.c revision 1.81
1 /* $NetBSD: iq80310_machdep.c,v 1.81 2012/07/29 00:07:08 matt 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 dependent 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 1.81 2012/07/29 00:07:08 matt 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 <sys/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 dependent 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; 151 152 /*int debug_flags;*/ 153 #ifndef PMAP_STATIC_L1S 154 int max_processes = 64; /* Default number */ 155 #endif /* !PMAP_STATIC_L1S */ 156 157 pv_addr_t minidataclean; 158 159 vm_offset_t msgbufphys; 160 161 #ifdef PMAP_DEBUG 162 extern int pmap_debug_level; 163 #endif 164 165 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 166 167 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 168 #define KERNEL_PT_KERNEL_NUM 4 169 170 /* L2 table for mapping i80312 */ 171 #define KERNEL_PT_IOPXS (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 172 173 /* L2 tables for mapping kernel VM */ 174 #define KERNEL_PT_VMDATA (KERNEL_PT_IOPXS + 1) 175 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 176 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 177 178 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 179 180 /* Prototypes */ 181 182 void consinit(void); 183 184 #include "com.h" 185 #if NCOM > 0 186 #include <dev/ic/comreg.h> 187 #include <dev/ic/comvar.h> 188 #endif 189 190 /* 191 * Define the default console speed for the board. This is generally 192 * what the firmware provided with the board defaults to. 193 */ 194 #ifndef CONSPEED 195 #define CONSPEED B115200 196 #endif /* ! CONSPEED */ 197 198 #ifndef CONUNIT 199 #define CONUNIT 0 200 #endif 201 202 #ifndef CONMODE 203 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 204 #endif 205 206 int comcnspeed = CONSPEED; 207 int comcnmode = CONMODE; 208 int comcnunit = CONUNIT; 209 210 /* 211 * void cpu_reboot(int howto, char *bootstr) 212 * 213 * Reboots the system 214 * 215 * Deal with any syncing, unmounting, dumping and shutdown hooks, 216 * then reset the CPU. 217 */ 218 void 219 cpu_reboot(int howto, char *bootstr) 220 { 221 222 /* 223 * If we are still cold then hit the air brakes 224 * and crash to earth fast 225 */ 226 if (cold) { 227 doshutdownhooks(); 228 pmf_system_shutdown(boothowto); 229 printf("The operating system has halted.\n"); 230 printf("Please press any key to reboot.\n\n"); 231 cngetc(); 232 printf("rebooting...\n"); 233 cpu_reset(); 234 /*NOTREACHED*/ 235 } 236 237 /* Disable console buffering */ 238 239 /* 240 * If RB_NOSYNC was not specified sync the discs. 241 * Note: Unless cold is set to 1 here, syslogd will die during the 242 * unmount. It looks like syslogd is getting woken up only to find 243 * that it cannot page part of the binary in as the filesystem has 244 * been unmounted. 245 */ 246 if (!(howto & RB_NOSYNC)) 247 bootsync(); 248 249 /* Say NO to interrupts */ 250 splhigh(); 251 252 /* Do a dump if requested. */ 253 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 254 dumpsys(); 255 256 /* Run any shutdown hooks */ 257 doshutdownhooks(); 258 259 pmf_system_shutdown(boothowto); 260 261 /* Make sure IRQ's are disabled */ 262 IRQdisable; 263 264 if (howto & RB_HALT) { 265 iq80310_7seg('.', '.'); 266 printf("The operating system has halted.\n"); 267 printf("Please press any key to reboot.\n\n"); 268 cngetc(); 269 } 270 271 printf("rebooting...\n"); 272 cpu_reset(); 273 /*NOTREACHED*/ 274 } 275 276 /* Static device mappings. */ 277 static const struct pmap_devmap iq80310_devmap[] = { 278 /* 279 * Map the on-board devices VA == PA so that we can access them 280 * with the MMU on or off. 281 */ 282 { 283 IQ80310_OBIO_BASE, 284 IQ80310_OBIO_BASE, 285 IQ80310_OBIO_SIZE, 286 VM_PROT_READ|VM_PROT_WRITE, 287 PTE_NOCACHE, 288 }, 289 { 290 IQ80310_PIOW_VBASE, 291 I80312_PCI_XLATE_PIOW_BASE, 292 I80312_PCI_XLATE_IOSIZE, 293 VM_PROT_READ|VM_PROT_WRITE, 294 PTE_NOCACHE, 295 }, 296 { 297 IQ80310_SIOW_VBASE, 298 I80312_PCI_XLATE_SIOW_BASE, 299 I80312_PCI_XLATE_IOSIZE, 300 VM_PROT_READ|VM_PROT_WRITE, 301 PTE_NOCACHE, 302 }, 303 { 304 IQ80310_80312_VBASE, 305 I80312_PMMR_BASE, 306 I80312_PMMR_SIZE, 307 VM_PROT_READ|VM_PROT_WRITE, 308 PTE_NOCACHE, 309 }, 310 311 { 312 0, 313 0, 314 0, 315 0, 316 0, 317 } 318 }; 319 320 /* 321 * u_int initarm(...) 322 * 323 * Initial entry point on startup. This gets called before main() is 324 * entered. 325 * It should be responsible for setting up everything that must be 326 * in place when main is called. 327 * This includes 328 * Taking a copy of the boot configuration structure. 329 * Initialising the physical console so characters can be printed. 330 * Setting up page tables for the kernel 331 * Relocating the kernel to the bottom of physical memory 332 */ 333 u_int 334 initarm(void *arg) 335 { 336 extern vaddr_t xscale_cache_clean_addr; 337 #ifdef DIAGNOSTIC 338 extern vsize_t xscale_minidata_clean_size; 339 #endif 340 int loop; 341 int loop1; 342 u_int l1pagetable; 343 paddr_t memstart; 344 psize_t memsize; 345 346 /* 347 * Clear out the 7-segment display. Whee, the first visual 348 * indication that we're running kernel code. 349 */ 350 iq80310_7seg(' ', ' '); 351 352 /* 353 * Heads up ... Setup the CPU / MMU / TLB functions 354 */ 355 if (set_cpufuncs()) 356 panic("CPU not recognized!"); 357 358 /* Calibrate the delay loop. */ 359 iq80310_calibrate_delay(); 360 361 /* 362 * Since we map the on-board devices VA==PA, and the kernel 363 * is running VA==PA, it's possible for us to initialize 364 * the console now. 365 */ 366 consinit(); 367 368 #ifdef VERBOSE_INIT_ARM 369 /* Talk to the user */ 370 printf("\nNetBSD/evbarm (IQ80310) booting ...\n"); 371 #endif 372 373 /* 374 * Reset the secondary PCI bus. RedBoot doesn't stop devices 375 * on the PCI bus before handing us control, so we have to 376 * do this. 377 * 378 * XXX This is arguably a bug in RedBoot, and doing this reset 379 * XXX could be problematic in the future if we encounter an 380 * XXX application where the PPB in the i80312 is used as a 381 * XXX PPB. 382 */ 383 { 384 uint32_t reg; 385 386 #ifdef VERBOSE_INIT_ARM 387 printf("Resetting secondary PCI bus...\n"); 388 #endif 389 reg = bus_space_read_4(&obio_bs_tag, 390 I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL); 391 bus_space_write_4(&obio_bs_tag, 392 I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL, 393 reg | PPB_BC_SECONDARY_RESET); 394 delay(10 * 1000); /* 10ms enough? */ 395 bus_space_write_4(&obio_bs_tag, 396 I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL, 397 reg); 398 } 399 400 /* 401 * We are currently running with the MMU enabled and the 402 * entire address space mapped VA==PA, except for the 403 * first 64M of RAM is also double-mapped at 0xc0000000. 404 * There is an L1 page table at 0xa0004000. 405 */ 406 407 /* 408 * Fetch the SDRAM start/size from the i80312 SDRAM configuration 409 * registers. 410 */ 411 i80312_sdram_bounds(&obio_bs_tag, I80312_PMMR_BASE + I80312_MEM_BASE, 412 &memstart, &memsize); 413 414 #ifdef VERBOSE_INIT_ARM 415 printf("initarm: Configuring system ...\n"); 416 #endif 417 418 /* Fake bootconfig structure for the benefit of pmap.c */ 419 /* XXX must make the memory description h/w independent */ 420 bootconfig.dramblocks = 1; 421 bootconfig.dram[0].address = memstart; 422 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 423 424 /* 425 * Set up the variables that define the availablilty of 426 * physical memory. For now, we're going to set 427 * physical_freestart to 0xa0200000 (where the kernel 428 * was loaded), and allocate the memory we need downwards. 429 * If we get too close to the L1 table that we set up, we 430 * will panic. We will update physical_freestart and 431 * physical_freeend later to reflect what pmap_bootstrap() 432 * wants to see. 433 * 434 * XXX pmap_bootstrap() needs an enema. 435 */ 436 physical_start = bootconfig.dram[0].address; 437 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 438 439 physical_freestart = 0xa0009000UL; 440 physical_freeend = 0xa0200000UL; 441 442 physmem = (physical_end - physical_start) / PAGE_SIZE; 443 444 #ifdef VERBOSE_INIT_ARM 445 /* Tell the user about the memory */ 446 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 447 physical_start, physical_end - 1); 448 #endif 449 450 /* 451 * Okay, the kernel starts 2MB in from the bottom of physical 452 * memory. We are going to allocate our bootstrap pages downwards 453 * from there. 454 * 455 * We need to allocate some fixed page tables to get the kernel 456 * going. We allocate one page directory and a number of page 457 * tables and store the physical addresses in the kernel_pt_table 458 * array. 459 * 460 * The kernel page directory must be on a 16K boundary. The page 461 * tables must be on 4K boundaries. What we do is allocate the 462 * page directory on the first 16K boundary that we encounter, and 463 * the page tables on 4K boundaries otherwise. Since we allocate 464 * at least 3 L2 page tables, we are guaranteed to encounter at 465 * least one 16K aligned region. 466 */ 467 468 #ifdef VERBOSE_INIT_ARM 469 printf("Allocating page tables\n"); 470 #endif 471 472 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 473 474 #ifdef VERBOSE_INIT_ARM 475 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 476 physical_freestart, free_pages, free_pages); 477 #endif 478 479 /* Define a macro to simplify memory allocation */ 480 #define valloc_pages(var, np) \ 481 alloc_pages((var).pv_pa, (np)); \ 482 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 483 484 #define alloc_pages(var, np) \ 485 physical_freeend -= ((np) * PAGE_SIZE); \ 486 if (physical_freeend < physical_freestart) \ 487 panic("initarm: out of memory"); \ 488 (var) = physical_freeend; \ 489 free_pages -= (np); \ 490 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 491 492 loop1 = 0; 493 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 494 /* Are we 16KB aligned for an L1 ? */ 495 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 496 && kernel_l1pt.pv_pa == 0) { 497 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 498 } else { 499 valloc_pages(kernel_pt_table[loop1], 500 L2_TABLE_SIZE / PAGE_SIZE); 501 ++loop1; 502 } 503 } 504 505 /* This should never be able to happen but better confirm that. */ 506 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 507 panic("initarm: Failed to align the kernel page directory"); 508 509 /* 510 * Allocate a page for the system page mapped to V0x00000000 511 * This page will just contain the system vectors and can be 512 * shared by all processes. 513 */ 514 alloc_pages(systempage.pv_pa, 1); 515 516 /* Allocate stacks for all modes */ 517 valloc_pages(irqstack, IRQ_STACK_SIZE); 518 valloc_pages(abtstack, ABT_STACK_SIZE); 519 valloc_pages(undstack, UND_STACK_SIZE); 520 valloc_pages(kernelstack, UPAGES); 521 522 /* Allocate enough pages for cleaning the Mini-Data cache. */ 523 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 524 valloc_pages(minidataclean, 1); 525 526 #ifdef VERBOSE_INIT_ARM 527 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 528 irqstack.pv_va); 529 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 530 abtstack.pv_va); 531 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 532 undstack.pv_va); 533 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 534 kernelstack.pv_va); 535 #endif 536 537 /* 538 * XXX Defer this to later so that we can reclaim the memory 539 * XXX used by the RedBoot page tables. 540 */ 541 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 542 543 /* 544 * Ok we have allocated physical pages for the primary kernel 545 * page tables 546 */ 547 548 #ifdef VERBOSE_INIT_ARM 549 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 550 #endif 551 552 /* 553 * Now we start construction of the L1 page table 554 * We start by mapping the L2 page tables into the L1. 555 * This means that we can replace L1 mappings later on if necessary 556 */ 557 l1pagetable = kernel_l1pt.pv_pa; 558 559 /* Map the L2 pages tables in the L1 page table */ 560 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 561 &kernel_pt_table[KERNEL_PT_SYS]); 562 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 563 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 564 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 565 pmap_link_l2pt(l1pagetable, IQ80310_IOPXS_VBASE, 566 &kernel_pt_table[KERNEL_PT_IOPXS]); 567 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 568 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 569 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 570 571 /* update the top of the kernel VM */ 572 pmap_curmaxkvaddr = 573 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 574 575 #ifdef VERBOSE_INIT_ARM 576 printf("Mapping kernel\n"); 577 #endif 578 579 /* Now we fill in the L2 pagetable for the kernel static code/data */ 580 { 581 extern char etext[], _end[]; 582 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 583 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 584 u_int logical; 585 586 textsize = (textsize + PGOFSET) & ~PGOFSET; 587 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 588 589 logical = 0x00200000; /* offset of kernel in RAM */ 590 591 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 592 physical_start + logical, textsize, 593 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 594 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 595 physical_start + logical, totalsize - textsize, 596 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 597 } 598 599 #ifdef VERBOSE_INIT_ARM 600 printf("Constructing L2 page tables\n"); 601 #endif 602 603 /* Map the stack pages */ 604 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 605 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 606 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 607 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 608 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 609 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 610 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 611 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 612 613 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 614 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 615 616 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 617 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 618 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 619 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 620 } 621 622 /* Map the Mini-Data cache clean area. */ 623 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 624 minidataclean.pv_pa); 625 626 /* Map the vector page. */ 627 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 628 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 629 630 /* Map the statically mapped devices. */ 631 pmap_devmap_bootstrap(l1pagetable, iq80310_devmap); 632 633 /* 634 * Give the XScale global cache clean code an appropriately 635 * sized chunk of unmapped VA space starting at 0xff000000 636 * (our device mappings end before this address). 637 */ 638 xscale_cache_clean_addr = 0xff000000U; 639 640 /* 641 * Now we have the real page tables in place so we can switch to them. 642 * Once this is done we will be running with the REAL kernel page 643 * tables. 644 */ 645 646 /* 647 * Update the physical_freestart/physical_freeend/free_pages 648 * variables. 649 */ 650 { 651 extern char _end[]; 652 653 physical_freestart = physical_start + 654 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 655 KERNEL_BASE); 656 physical_freeend = physical_end; 657 free_pages = 658 (physical_freeend - physical_freestart) / PAGE_SIZE; 659 } 660 661 /* Switch tables */ 662 #ifdef VERBOSE_INIT_ARM 663 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 664 physical_freestart, free_pages, free_pages); 665 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 666 #endif 667 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 668 cpu_setttb(kernel_l1pt.pv_pa); 669 cpu_tlb_flushID(); 670 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 671 672 /* 673 * Moved from cpu_startup() as data_abort_handler() references 674 * this during uvm init 675 */ 676 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 677 678 #ifdef VERBOSE_INIT_ARM 679 printf("done!\n"); 680 #endif 681 682 #ifdef VERBOSE_INIT_ARM 683 printf("bootstrap done.\n"); 684 #endif 685 686 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 687 688 /* 689 * Pages were allocated during the secondary bootstrap for the 690 * stacks for different CPU modes. 691 * We must now set the r13 registers in the different CPU modes to 692 * point to these stacks. 693 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 694 * of the stack memory. 695 */ 696 #ifdef VERBOSE_INIT_ARM 697 printf("init subsystems: stacks "); 698 #endif 699 700 set_stackptr(PSR_IRQ32_MODE, 701 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 702 set_stackptr(PSR_ABT32_MODE, 703 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 704 set_stackptr(PSR_UND32_MODE, 705 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 706 707 /* 708 * Well we should set a data abort handler. 709 * Once things get going this will change as we will need a proper 710 * handler. 711 * Until then we will use a handler that just panics but tells us 712 * why. 713 * Initialisation of the vectors will just panic on a data abort. 714 * This just fills in a slightly better one. 715 */ 716 #ifdef VERBOSE_INIT_ARM 717 printf("vectors "); 718 #endif 719 data_abort_handler_address = (u_int)data_abort_handler; 720 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 721 undefined_handler_address = (u_int)undefinedinstruction_bounce; 722 723 /* Initialise the undefined instruction handlers */ 724 #ifdef VERBOSE_INIT_ARM 725 printf("undefined "); 726 #endif 727 undefined_init(); 728 729 /* Load memory into UVM. */ 730 #ifdef VERBOSE_INIT_ARM 731 printf("page "); 732 #endif 733 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 734 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 735 atop(physical_freestart), atop(physical_freeend), 736 VM_FREELIST_DEFAULT); 737 738 /* Boot strap pmap telling it where the kernel page table is */ 739 #ifdef VERBOSE_INIT_ARM 740 printf("pmap "); 741 #endif 742 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 743 744 /* Setup the IRQ system */ 745 #ifdef VERBOSE_INIT_ARM 746 printf("irq "); 747 #endif 748 iq80310_intr_init(); 749 750 #ifdef VERBOSE_INIT_ARM 751 printf("done.\n"); 752 #endif 753 754 #ifdef DDB 755 db_machine_init(); 756 if (boothowto & RB_KDB) 757 Debugger(); 758 #endif 759 760 /* We return the new stack pointer address */ 761 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 762 } 763 764 void 765 consinit(void) 766 { 767 static const bus_addr_t comcnaddrs[] = { 768 IQ80310_UART2, /* com0 (J9) */ 769 IQ80310_UART1, /* com1 (J10) */ 770 }; 771 static int consinit_called; 772 773 if (consinit_called != 0) 774 return; 775 776 consinit_called = 1; 777 778 /* 779 * Console devices are mapped VA==PA. Our devmap reflects 780 * this, so register it now so drivers can map the console 781 * device. 782 */ 783 pmap_devmap_register(iq80310_devmap); 784 785 #if NCOM > 0 786 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 787 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 788 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 789 #else 790 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 791 #endif 792 } 793
Indexes created Wed Oct 29 01:09:52 GMT 2025