iq80310_machdep.c revision 1.86.14.1
1 /* $NetBSD: iq80310_machdep.c,v 1.86.14.1 2018/09/06 06:55:31 pgoyette 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 1.86.14.1 2018/09/06 06:55:31 pgoyette Exp $"); 77 78 #include "opt_arm_debug.h" 79 #include "opt_ddb.h" 80 #include "opt_pmap_debug.h" 81 82 #include <sys/param.h> 83 #include <sys/device.h> 84 #include <sys/systm.h> 85 #include <sys/kernel.h> 86 #include <sys/exec.h> 87 #include <sys/proc.h> 88 #include <sys/msgbuf.h> 89 #include <sys/reboot.h> 90 #include <sys/termios.h> 91 #include <sys/ksyms.h> 92 #include <sys/bus.h> 93 #include <sys/cpu.h> 94 95 #include <uvm/uvm_extern.h> 96 97 #include <dev/cons.h> 98 99 #include <machine/db_machdep.h> 100 #include <ddb/db_sym.h> 101 #include <ddb/db_extern.h> 102 103 #include <machine/bootconfig.h> 104 #include <arm/locore.h> 105 #include <arm/undefined.h> 106 107 #include <arm/arm32/machdep.h> 108 109 #include <arm/xscale/i80312reg.h> 110 #include <arm/xscale/i80312var.h> 111 112 #include <dev/pci/ppbreg.h> 113 114 #include <evbarm/iq80310/iq80310reg.h> 115 #include <evbarm/iq80310/iq80310var.h> 116 #include <evbarm/iq80310/obiovar.h> 117 118 #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 BootConfig bootconfig; /* Boot config storage */ 131 char *boot_args = NULL; 132 char *boot_file = NULL; 133 134 vaddr_t physical_start; 135 vaddr_t physical_freestart; 136 vaddr_t physical_freeend; 137 vaddr_t physical_end; 138 u_int free_pages; 139 140 /*int debug_flags;*/ 141 #ifndef PMAP_STATIC_L1S 142 int max_processes = 64; /* Default number */ 143 #endif /* !PMAP_STATIC_L1S */ 144 145 pv_addr_t minidataclean; 146 147 paddr_t msgbufphys; 148 149 #ifdef PMAP_DEBUG 150 extern int pmap_debug_level; 151 #endif 152 153 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 154 155 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 156 #define KERNEL_PT_KERNEL_NUM 4 157 158 /* L2 table for mapping i80312 */ 159 #define KERNEL_PT_IOPXS (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 160 161 /* L2 tables for mapping kernel VM */ 162 #define KERNEL_PT_VMDATA (KERNEL_PT_IOPXS + 1) 163 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 164 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 165 166 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 167 168 /* Prototypes */ 169 170 void consinit(void); 171 172 #include "com.h" 173 #if NCOM > 0 174 #include <dev/ic/comreg.h> 175 #include <dev/ic/comvar.h> 176 #endif 177 178 /* 179 * Define the default console speed for the board. This is generally 180 * what the firmware provided with the board defaults to. 181 */ 182 #ifndef CONSPEED 183 #define CONSPEED B115200 184 #endif /* ! CONSPEED */ 185 186 #ifndef CONUNIT 187 #define CONUNIT 0 188 #endif 189 190 #ifndef CONMODE 191 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 192 #endif 193 194 int comcnspeed = CONSPEED; 195 int comcnmode = CONMODE; 196 int comcnunit = CONUNIT; 197 198 /* 199 * void cpu_reboot(int howto, char *bootstr) 200 * 201 * Reboots the system 202 * 203 * Deal with any syncing, unmounting, dumping and shutdown hooks, 204 * then reset the CPU. 205 */ 206 void 207 cpu_reboot(int howto, char *bootstr) 208 { 209 210 /* 211 * If we are still cold then hit the air brakes 212 * and crash to earth fast 213 */ 214 if (cold) { 215 doshutdownhooks(); 216 pmf_system_shutdown(boothowto); 217 printf("The operating system has halted.\n"); 218 printf("Please press any key to reboot.\n\n"); 219 cngetc(); 220 printf("rebooting...\n"); 221 cpu_reset(); 222 /*NOTREACHED*/ 223 } 224 225 /* Disable console buffering */ 226 227 /* 228 * If RB_NOSYNC was not specified sync the discs. 229 * Note: Unless cold is set to 1 here, syslogd will die during the 230 * unmount. It looks like syslogd is getting woken up only to find 231 * that it cannot page part of the binary in as the filesystem has 232 * been unmounted. 233 */ 234 if (!(howto & RB_NOSYNC)) 235 bootsync(); 236 237 /* Say NO to interrupts */ 238 splhigh(); 239 240 /* Do a dump if requested. */ 241 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 242 dumpsys(); 243 244 /* Run any shutdown hooks */ 245 doshutdownhooks(); 246 247 pmf_system_shutdown(boothowto); 248 249 /* Make sure IRQ's are disabled */ 250 IRQdisable; 251 252 if (howto & RB_HALT) { 253 iq80310_7seg('.', '.'); 254 printf("The operating system has halted.\n"); 255 printf("Please press any key to reboot.\n\n"); 256 cngetc(); 257 } 258 259 printf("rebooting...\n"); 260 cpu_reset(); 261 /*NOTREACHED*/ 262 } 263 264 /* Static device mappings. */ 265 static const struct pmap_devmap iq80310_devmap[] = { 266 /* 267 * Map the on-board devices VA == PA so that we can access them 268 * with the MMU on or off. 269 */ 270 { 271 IQ80310_OBIO_BASE, 272 IQ80310_OBIO_BASE, 273 IQ80310_OBIO_SIZE, 274 VM_PROT_READ|VM_PROT_WRITE, 275 PTE_NOCACHE, 276 }, 277 { 278 IQ80310_PIOW_VBASE, 279 I80312_PCI_XLATE_PIOW_BASE, 280 I80312_PCI_XLATE_IOSIZE, 281 VM_PROT_READ|VM_PROT_WRITE, 282 PTE_NOCACHE, 283 }, 284 { 285 IQ80310_SIOW_VBASE, 286 I80312_PCI_XLATE_SIOW_BASE, 287 I80312_PCI_XLATE_IOSIZE, 288 VM_PROT_READ|VM_PROT_WRITE, 289 PTE_NOCACHE, 290 }, 291 { 292 IQ80310_80312_VBASE, 293 I80312_PMMR_BASE, 294 I80312_PMMR_SIZE, 295 VM_PROT_READ|VM_PROT_WRITE, 296 PTE_NOCACHE, 297 }, 298 299 { 300 0, 301 0, 302 0, 303 0, 304 0, 305 } 306 }; 307 308 /* 309 * u_int initarm(...) 310 * 311 * Initial entry point on startup. This gets called before main() is 312 * entered. 313 * It should be responsible for setting up everything that must be 314 * in place when main is called. 315 * This includes 316 * Taking a copy of the boot configuration structure. 317 * Initialising the physical console so characters can be printed. 318 * Setting up page tables for the kernel 319 * Relocating the kernel to the bottom of physical memory 320 */ 321 u_int 322 initarm(void *arg) 323 { 324 extern vaddr_t xscale_cache_clean_addr; 325 #ifdef DIAGNOSTIC 326 extern vsize_t xscale_minidata_clean_size; 327 #endif 328 int loop; 329 int loop1; 330 u_int l1pagetable; 331 paddr_t memstart; 332 psize_t memsize; 333 334 /* 335 * Clear out the 7-segment display. Whee, the first visual 336 * indication that we're running kernel code. 337 */ 338 iq80310_7seg(' ', ' '); 339 340 /* 341 * Heads up ... Setup the CPU / MMU / TLB functions 342 */ 343 if (set_cpufuncs()) 344 panic("CPU not recognized!"); 345 346 /* Calibrate the delay loop. */ 347 iq80310_calibrate_delay(); 348 349 /* 350 * Since we map the on-board devices VA==PA, and the kernel 351 * is running VA==PA, it's possible for us to initialize 352 * the console now. 353 */ 354 consinit(); 355 356 #ifdef VERBOSE_INIT_ARM 357 /* Talk to the user */ 358 printf("\nNetBSD/evbarm (IQ80310) booting ...\n"); 359 #endif 360 361 /* 362 * Reset the secondary PCI bus. RedBoot doesn't stop devices 363 * on the PCI bus before handing us control, so we have to 364 * do this. 365 * 366 * XXX This is arguably a bug in RedBoot, and doing this reset 367 * XXX could be problematic in the future if we encounter an 368 * XXX application where the PPB in the i80312 is used as a 369 * XXX PPB. 370 */ 371 { 372 uint32_t reg; 373 374 #ifdef VERBOSE_INIT_ARM 375 printf("Resetting secondary PCI bus...\n"); 376 #endif 377 reg = bus_space_read_4(&obio_bs_tag, 378 I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL); 379 bus_space_write_4(&obio_bs_tag, 380 I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL, 381 reg | PPB_BC_SECONDARY_RESET); 382 delay(10 * 1000); /* 10ms enough? */ 383 bus_space_write_4(&obio_bs_tag, 384 I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL, 385 reg); 386 } 387 388 /* 389 * We are currently running with the MMU enabled and the 390 * entire address space mapped VA==PA, except for the 391 * first 64M of RAM is also double-mapped at 0xc0000000. 392 * There is an L1 page table at 0xa0004000. 393 */ 394 395 /* 396 * Fetch the SDRAM start/size from the i80312 SDRAM configuration 397 * registers. 398 */ 399 i80312_sdram_bounds(&obio_bs_tag, I80312_PMMR_BASE + I80312_MEM_BASE, 400 &memstart, &memsize); 401 402 #ifdef VERBOSE_INIT_ARM 403 printf("initarm: Configuring system ...\n"); 404 #endif 405 406 /* Fake bootconfig structure for the benefit of pmap.c */ 407 /* XXX must make the memory description h/w independent */ 408 bootconfig.dramblocks = 1; 409 bootconfig.dram[0].address = memstart; 410 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 411 412 /* 413 * Set up the variables that define the availablilty of 414 * physical memory. For now, we're going to set 415 * physical_freestart to 0xa0200000 (where the kernel 416 * was loaded), and allocate the memory we need downwards. 417 * If we get too close to the L1 table that we set up, we 418 * will panic. We will update physical_freestart and 419 * physical_freeend later to reflect what pmap_bootstrap() 420 * wants to see. 421 * 422 * XXX pmap_bootstrap() needs an enema. 423 */ 424 physical_start = bootconfig.dram[0].address; 425 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 426 427 physical_freestart = 0xa0009000UL; 428 physical_freeend = 0xa0200000UL; 429 430 physmem = (physical_end - physical_start) / PAGE_SIZE; 431 432 #ifdef VERBOSE_INIT_ARM 433 /* Tell the user about the memory */ 434 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 435 physical_start, physical_end - 1); 436 #endif 437 438 /* 439 * Okay, the kernel starts 2MB in from the bottom of physical 440 * memory. We are going to allocate our bootstrap pages downwards 441 * from there. 442 * 443 * We need to allocate some fixed page tables to get the kernel 444 * going. We allocate one page directory and a number of page 445 * tables and store the physical addresses in the kernel_pt_table 446 * array. 447 * 448 * The kernel page directory must be on a 16K boundary. The page 449 * tables must be on 4K boundaries. What we do is allocate the 450 * page directory on the first 16K boundary that we encounter, and 451 * the page tables on 4K boundaries otherwise. Since we allocate 452 * at least 3 L2 page tables, we are guaranteed to encounter at 453 * least one 16K aligned region. 454 */ 455 456 #ifdef VERBOSE_INIT_ARM 457 printf("Allocating page tables\n"); 458 #endif 459 460 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 461 462 #ifdef VERBOSE_INIT_ARM 463 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 464 physical_freestart, free_pages, free_pages); 465 #endif 466 467 /* Define a macro to simplify memory allocation */ 468 #define valloc_pages(var, np) \ 469 alloc_pages((var).pv_pa, (np)); \ 470 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 471 472 #define alloc_pages(var, np) \ 473 physical_freeend -= ((np) * PAGE_SIZE); \ 474 if (physical_freeend < physical_freestart) \ 475 panic("initarm: out of memory"); \ 476 (var) = physical_freeend; \ 477 free_pages -= (np); \ 478 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 479 480 loop1 = 0; 481 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 482 /* Are we 16KB aligned for an L1 ? */ 483 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 484 && kernel_l1pt.pv_pa == 0) { 485 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 486 } else { 487 valloc_pages(kernel_pt_table[loop1], 488 L2_TABLE_SIZE / PAGE_SIZE); 489 ++loop1; 490 } 491 } 492 493 /* This should never be able to happen but better confirm that. */ 494 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 495 panic("initarm: Failed to align the kernel page directory"); 496 497 /* 498 * Allocate a page for the system page mapped to V0x00000000 499 * This page will just contain the system vectors and can be 500 * shared by all processes. 501 */ 502 alloc_pages(systempage.pv_pa, 1); 503 504 /* Allocate stacks for all modes */ 505 valloc_pages(irqstack, IRQ_STACK_SIZE); 506 valloc_pages(abtstack, ABT_STACK_SIZE); 507 valloc_pages(undstack, UND_STACK_SIZE); 508 valloc_pages(kernelstack, UPAGES); 509 510 /* Allocate enough pages for cleaning the Mini-Data cache. */ 511 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 512 valloc_pages(minidataclean, 1); 513 514 #ifdef VERBOSE_INIT_ARM 515 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 516 irqstack.pv_va); 517 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 518 abtstack.pv_va); 519 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 520 undstack.pv_va); 521 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 522 kernelstack.pv_va); 523 #endif 524 525 /* 526 * XXX Defer this to later so that we can reclaim the memory 527 * XXX used by the RedBoot page tables. 528 */ 529 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 530 531 /* 532 * Ok we have allocated physical pages for the primary kernel 533 * page tables 534 */ 535 536 #ifdef VERBOSE_INIT_ARM 537 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 538 #endif 539 540 /* 541 * Now we start construction of the L1 page table 542 * We start by mapping the L2 page tables into the L1. 543 * This means that we can replace L1 mappings later on if necessary 544 */ 545 l1pagetable = kernel_l1pt.pv_pa; 546 547 /* Map the L2 pages tables in the L1 page table */ 548 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 549 &kernel_pt_table[KERNEL_PT_SYS]); 550 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 551 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 552 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 553 pmap_link_l2pt(l1pagetable, IQ80310_IOPXS_VBASE, 554 &kernel_pt_table[KERNEL_PT_IOPXS]); 555 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 556 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 557 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 558 559 /* update the top of the kernel VM */ 560 pmap_curmaxkvaddr = 561 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 562 563 #ifdef VERBOSE_INIT_ARM 564 printf("Mapping kernel\n"); 565 #endif 566 567 /* Now we fill in the L2 pagetable for the kernel static code/data */ 568 { 569 extern char etext[], _end[]; 570 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 571 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 572 u_int logical; 573 574 textsize = (textsize + PGOFSET) & ~PGOFSET; 575 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 576 577 logical = 0x00200000; /* offset of kernel in RAM */ 578 579 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 580 physical_start + logical, textsize, 581 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 582 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 583 physical_start + logical, totalsize - textsize, 584 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 585 } 586 587 #ifdef VERBOSE_INIT_ARM 588 printf("Constructing L2 page tables\n"); 589 #endif 590 591 /* Map the stack pages */ 592 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 593 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 594 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 595 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 596 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 597 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 598 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 599 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 600 601 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 602 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 603 604 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 605 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 606 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 607 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 608 } 609 610 /* Map the Mini-Data cache clean area. */ 611 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 612 minidataclean.pv_pa); 613 614 /* Map the vector page. */ 615 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 616 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 617 618 /* Map the statically mapped devices. */ 619 pmap_devmap_bootstrap(l1pagetable, iq80310_devmap); 620 621 /* 622 * Give the XScale global cache clean code an appropriately 623 * sized chunk of unmapped VA space starting at 0xff000000 624 * (our device mappings end before this address). 625 */ 626 xscale_cache_clean_addr = 0xff000000U; 627 628 /* 629 * Now we have the real page tables in place so we can switch to them. 630 * Once this is done we will be running with the REAL kernel page 631 * tables. 632 */ 633 634 /* 635 * Update the physical_freestart/physical_freeend/free_pages 636 * variables. 637 */ 638 { 639 extern char _end[]; 640 641 physical_freestart = physical_start + 642 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 643 KERNEL_BASE); 644 physical_freeend = physical_end; 645 free_pages = 646 (physical_freeend - physical_freestart) / PAGE_SIZE; 647 } 648 649 /* Switch tables */ 650 #ifdef VERBOSE_INIT_ARM 651 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 652 physical_freestart, free_pages, free_pages); 653 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 654 #endif 655 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 656 cpu_setttb(kernel_l1pt.pv_pa, true); 657 cpu_tlb_flushID(); 658 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 659 660 /* 661 * Moved from cpu_startup() as data_abort_handler() references 662 * this during uvm init 663 */ 664 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 665 666 #ifdef VERBOSE_INIT_ARM 667 printf("done!\n"); 668 #endif 669 670 #ifdef VERBOSE_INIT_ARM 671 printf("bootstrap done.\n"); 672 #endif 673 674 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 675 676 /* 677 * Pages were allocated during the secondary bootstrap for the 678 * stacks for different CPU modes. 679 * We must now set the r13 registers in the different CPU modes to 680 * point to these stacks. 681 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 682 * of the stack memory. 683 */ 684 #ifdef VERBOSE_INIT_ARM 685 printf("init subsystems: stacks "); 686 #endif 687 688 set_stackptr(PSR_IRQ32_MODE, 689 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 690 set_stackptr(PSR_ABT32_MODE, 691 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 692 set_stackptr(PSR_UND32_MODE, 693 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 694 695 /* 696 * Well we should set a data abort handler. 697 * Once things get going this will change as we will need a proper 698 * handler. 699 * Until then we will use a handler that just panics but tells us 700 * why. 701 * Initialisation of the vectors will just panic on a data abort. 702 * This just fills in a slightly better one. 703 */ 704 #ifdef VERBOSE_INIT_ARM 705 printf("vectors "); 706 #endif 707 data_abort_handler_address = (u_int)data_abort_handler; 708 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 709 undefined_handler_address = (u_int)undefinedinstruction_bounce; 710 711 /* Initialise the undefined instruction handlers */ 712 #ifdef VERBOSE_INIT_ARM 713 printf("undefined "); 714 #endif 715 undefined_init(); 716 717 /* Load memory into UVM. */ 718 #ifdef VERBOSE_INIT_ARM 719 printf("page "); 720 #endif 721 uvm_md_init(); 722 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 723 atop(physical_freestart), atop(physical_freeend), 724 VM_FREELIST_DEFAULT); 725 726 /* Boot strap pmap telling it where the kernel page table is */ 727 #ifdef VERBOSE_INIT_ARM 728 printf("pmap "); 729 #endif 730 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 731 732 /* Setup the IRQ system */ 733 #ifdef VERBOSE_INIT_ARM 734 printf("irq "); 735 #endif 736 iq80310_intr_init(); 737 738 #ifdef VERBOSE_INIT_ARM 739 printf("done.\n"); 740 #endif 741 742 #ifdef DDB 743 db_machine_init(); 744 if (boothowto & RB_KDB) 745 Debugger(); 746 #endif 747 748 /* We return the new stack pointer address */ 749 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 750 } 751 752 void 753 consinit(void) 754 { 755 static const bus_addr_t comcnaddrs[] = { 756 IQ80310_UART2, /* com0 (J9) */ 757 IQ80310_UART1, /* com1 (J10) */ 758 }; 759 static int consinit_called; 760 761 if (consinit_called != 0) 762 return; 763 764 consinit_called = 1; 765 766 /* 767 * Console devices are mapped VA==PA. Our devmap reflects 768 * this, so register it now so drivers can map the console 769 * device. 770 */ 771 pmap_devmap_register(iq80310_devmap); 772 773 #if NCOM > 0 774 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 775 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 776 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 777 #else 778 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 779 #endif 780 } 781
Indexes created Tue Oct 28 12:10:06 GMT 2025