iq80310_machdep.c revision 1.92
1 /* $NetBSD: iq80310_machdep.c,v 1.92 2020/04/18 10:55:44 skrll 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 1.92 2020/04/18 10:55:44 skrll Exp $"); 77 78 #include "opt_arm_debug.h" 79 #include "opt_console.h" 80 #include "opt_ddb.h" 81 #include "opt_pmap_debug.h" 82 83 #include <sys/param.h> 84 #include <sys/device.h> 85 #include <sys/systm.h> 86 #include <sys/kernel.h> 87 #include <sys/exec.h> 88 #include <sys/proc.h> 89 #include <sys/msgbuf.h> 90 #include <sys/reboot.h> 91 #include <sys/termios.h> 92 #include <sys/ksyms.h> 93 #include <sys/bus.h> 94 #include <sys/cpu.h> 95 96 #include <uvm/uvm_extern.h> 97 98 #include <dev/cons.h> 99 100 #include <machine/db_machdep.h> 101 #include <ddb/db_sym.h> 102 #include <ddb/db_extern.h> 103 104 #include <machine/bootconfig.h> 105 #include <arm/locore.h> 106 #include <arm/undefined.h> 107 108 #include <arm/arm32/machdep.h> 109 110 #include <arm/xscale/i80312reg.h> 111 #include <arm/xscale/i80312var.h> 112 113 #include <dev/pci/ppbreg.h> 114 115 #include <evbarm/iq80310/iq80310reg.h> 116 #include <evbarm/iq80310/iq80310var.h> 117 #include <evbarm/iq80310/obiovar.h> 118 119 #include "ksyms.h" 120 121 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 122 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 123 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 124 125 /* 126 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 127 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 128 */ 129 #define KERNEL_VM_SIZE 0x0C000000 130 131 BootConfig bootconfig; /* Boot config storage */ 132 char *boot_args = NULL; 133 char *boot_file = NULL; 134 135 vaddr_t physical_start; 136 vaddr_t physical_freestart; 137 vaddr_t physical_freeend; 138 vaddr_t physical_end; 139 u_int free_pages; 140 141 /*int debug_flags;*/ 142 #ifndef PMAP_STATIC_L1S 143 int max_processes = 64; /* Default number */ 144 #endif /* !PMAP_STATIC_L1S */ 145 146 pv_addr_t minidataclean; 147 148 paddr_t msgbufphys; 149 150 #ifdef PMAP_DEBUG 151 extern int pmap_debug_level; 152 #endif 153 154 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 155 156 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 157 #define KERNEL_PT_KERNEL_NUM 4 158 159 /* L2 table for mapping i80312 */ 160 #define KERNEL_PT_IOPXS (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 161 162 /* L2 tables for mapping kernel VM */ 163 #define KERNEL_PT_VMDATA (KERNEL_PT_IOPXS + 1) 164 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 165 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 166 167 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 168 169 /* Prototypes */ 170 171 void consinit(void); 172 173 #include "com.h" 174 #if NCOM > 0 175 #include <dev/ic/comreg.h> 176 #include <dev/ic/comvar.h> 177 #endif 178 179 /* 180 * Define the default console speed for the board. This is generally 181 * what the firmware provided with the board defaults to. 182 */ 183 #ifndef CONSPEED 184 #define CONSPEED B115200 185 #endif /* ! CONSPEED */ 186 187 #ifndef CONUNIT 188 #define CONUNIT 0 189 #endif 190 191 #ifndef CONMODE 192 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 193 #endif 194 195 int comcnspeed = CONSPEED; 196 int comcnmode = CONMODE; 197 int comcnunit = CONUNIT; 198 199 /* 200 * void cpu_reboot(int howto, char *bootstr) 201 * 202 * Reboots the system 203 * 204 * Deal with any syncing, unmounting, dumping and shutdown hooks, 205 * then reset the CPU. 206 */ 207 void 208 cpu_reboot(int howto, char *bootstr) 209 { 210 211 /* 212 * If we are still cold then hit the air brakes 213 * and crash to earth fast 214 */ 215 if (cold) { 216 doshutdownhooks(); 217 pmf_system_shutdown(boothowto); 218 printf("The operating system has halted.\n"); 219 printf("Please press any key to reboot.\n\n"); 220 cngetc(); 221 printf("rebooting...\n"); 222 cpu_reset(); 223 /*NOTREACHED*/ 224 } 225 226 /* Disable console buffering */ 227 228 /* 229 * If RB_NOSYNC was not specified sync the discs. 230 * Note: Unless cold is set to 1 here, syslogd will die during the 231 * unmount. It looks like syslogd is getting woken up only to find 232 * that it cannot page part of the binary in as the filesystem has 233 * been unmounted. 234 */ 235 if (!(howto & RB_NOSYNC)) 236 bootsync(); 237 238 /* Say NO to interrupts */ 239 splhigh(); 240 241 /* Do a dump if requested. */ 242 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 243 dumpsys(); 244 245 /* Run any shutdown hooks */ 246 doshutdownhooks(); 247 248 pmf_system_shutdown(boothowto); 249 250 /* Make sure IRQ's are disabled */ 251 IRQdisable; 252 253 if (howto & RB_HALT) { 254 iq80310_7seg('.', '.'); 255 printf("The operating system has halted.\n"); 256 printf("Please press any key to reboot.\n\n"); 257 cngetc(); 258 } 259 260 printf("rebooting...\n"); 261 cpu_reset(); 262 /*NOTREACHED*/ 263 } 264 265 /* Static device mappings. */ 266 static const struct pmap_devmap iq80310_devmap[] = { 267 /* 268 * Map the on-board devices VA == PA so that we can access them 269 * with the MMU on or off. 270 */ 271 { 272 IQ80310_OBIO_BASE, 273 IQ80310_OBIO_BASE, 274 IQ80310_OBIO_SIZE, 275 VM_PROT_READ|VM_PROT_WRITE, 276 PTE_NOCACHE, 277 }, 278 { 279 IQ80310_PIOW_VBASE, 280 I80312_PCI_XLATE_PIOW_BASE, 281 I80312_PCI_XLATE_IOSIZE, 282 VM_PROT_READ|VM_PROT_WRITE, 283 PTE_NOCACHE, 284 }, 285 { 286 IQ80310_SIOW_VBASE, 287 I80312_PCI_XLATE_SIOW_BASE, 288 I80312_PCI_XLATE_IOSIZE, 289 VM_PROT_READ|VM_PROT_WRITE, 290 PTE_NOCACHE, 291 }, 292 { 293 IQ80310_80312_VBASE, 294 I80312_PMMR_BASE, 295 I80312_PMMR_SIZE, 296 VM_PROT_READ|VM_PROT_WRITE, 297 PTE_NOCACHE, 298 }, 299 300 { 301 0, 302 0, 303 0, 304 0, 305 0, 306 } 307 }; 308 309 /* 310 * vaddr_t initarm(...) 311 * 312 * Initial entry point on startup. This gets called before main() is 313 * entered. 314 * It should be responsible for setting up everything that must be 315 * in place when main is called. 316 * This includes 317 * Taking a copy of the boot configuration structure. 318 * Initialising the physical console so characters can be printed. 319 * Setting up page tables for the kernel 320 * Relocating the kernel to the bottom of physical memory 321 */ 322 vaddr_t 323 initarm(void *arg) 324 { 325 extern vaddr_t xscale_cache_clean_addr; 326 #ifdef DIAGNOSTIC 327 extern vsize_t xscale_minidata_clean_size; 328 #endif 329 int loop; 330 int loop1; 331 u_int l1pagetable; 332 paddr_t memstart; 333 psize_t memsize; 334 335 /* 336 * Clear out the 7-segment display. Whee, the first visual 337 * indication that we're running kernel code. 338 */ 339 iq80310_7seg(' ', ' '); 340 341 /* 342 * Heads up ... Setup the CPU / MMU / TLB functions 343 */ 344 if (set_cpufuncs()) 345 panic("CPU not recognized!"); 346 347 /* Calibrate the delay loop. */ 348 iq80310_calibrate_delay(); 349 350 /* 351 * Since we map the on-board devices VA==PA, and the kernel 352 * is running VA==PA, it's possible for us to initialize 353 * the console now. 354 */ 355 consinit(); 356 357 #ifdef VERBOSE_INIT_ARM 358 /* Talk to the user */ 359 printf("\nNetBSD/evbarm (IQ80310) booting ...\n"); 360 #endif 361 362 /* 363 * Reset the secondary PCI bus. RedBoot doesn't stop devices 364 * on the PCI bus before handing us control, so we have to 365 * do this. 366 * 367 * XXX This is arguably a bug in RedBoot, and doing this reset 368 * XXX could be problematic in the future if we encounter an 369 * XXX application where the PPB in the i80312 is used as a 370 * XXX PPB. 371 */ 372 { 373 uint32_t reg; 374 375 #ifdef VERBOSE_INIT_ARM 376 printf("Resetting secondary PCI bus...\n"); 377 #endif 378 reg = bus_space_read_4(&obio_bs_tag, 379 I80312_PMMR_BASE + I80312_PPB_BASE, PCI_BRIDGE_CONTROL_REG); 380 bus_space_write_4(&obio_bs_tag, 381 I80312_PMMR_BASE + I80312_PPB_BASE, PCI_BRIDGE_CONTROL_REG, 382 reg | PCI_BRIDGE_CONTROL_SECBR); 383 delay(10 * 1000); /* 10ms enough? */ 384 bus_space_write_4(&obio_bs_tag, 385 I80312_PMMR_BASE + I80312_PPB_BASE, PCI_BRIDGE_CONTROL_REG, 386 reg); 387 } 388 389 /* 390 * We are currently running with the MMU enabled and the 391 * entire address space mapped VA==PA, except for the 392 * first 64M of RAM is also double-mapped at 0xc0000000. 393 * There is an L1 page table at 0xa0004000. 394 */ 395 396 /* 397 * Fetch the SDRAM start/size from the i80312 SDRAM configuration 398 * registers. 399 */ 400 i80312_sdram_bounds(&obio_bs_tag, I80312_PMMR_BASE + I80312_MEM_BASE, 401 &memstart, &memsize); 402 403 #ifdef VERBOSE_INIT_ARM 404 printf("initarm: Configuring system ...\n"); 405 #endif 406 407 /* Fake bootconfig structure for the benefit of pmap.c */ 408 /* XXX must make the memory description h/w independent */ 409 bootconfig.dramblocks = 1; 410 bootconfig.dram[0].address = memstart; 411 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 412 413 /* 414 * Set up the variables that define the availablilty of 415 * physical memory. For now, we're going to set 416 * physical_freestart to 0xa0200000 (where the kernel 417 * was loaded), and allocate the memory we need downwards. 418 * If we get too close to the L1 table that we set up, we 419 * will panic. We will update physical_freestart and 420 * physical_freeend later to reflect what pmap_bootstrap() 421 * wants to see. 422 * 423 * XXX pmap_bootstrap() needs an enema. 424 */ 425 physical_start = bootconfig.dram[0].address; 426 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 427 428 physical_freestart = 0xa0009000UL; 429 physical_freeend = 0xa0200000UL; 430 431 physmem = (physical_end - physical_start) / PAGE_SIZE; 432 433 #ifdef VERBOSE_INIT_ARM 434 /* Tell the user about the memory */ 435 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 436 physical_start, physical_end - 1); 437 #endif 438 439 /* 440 * Okay, the kernel starts 2MB in from the bottom of physical 441 * memory. We are going to allocate our bootstrap pages downwards 442 * from there. 443 * 444 * We need to allocate some fixed page tables to get the kernel 445 * going. We allocate one page directory and a number of page 446 * tables and store the physical addresses in the kernel_pt_table 447 * array. 448 * 449 * The kernel page directory must be on a 16K boundary. The page 450 * tables must be on 4K boundaries. What we do is allocate the 451 * page directory on the first 16K boundary that we encounter, and 452 * the page tables on 4K boundaries otherwise. Since we allocate 453 * at least 3 L2 page tables, we are guaranteed to encounter at 454 * least one 16K aligned region. 455 */ 456 457 #ifdef VERBOSE_INIT_ARM 458 printf("Allocating page tables\n"); 459 #endif 460 461 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 462 463 #ifdef VERBOSE_INIT_ARM 464 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 465 physical_freestart, free_pages, free_pages); 466 #endif 467 468 /* Define a macro to simplify memory allocation */ 469 #define valloc_pages(var, np) \ 470 alloc_pages((var).pv_pa, (np)); \ 471 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 472 473 #define alloc_pages(var, np) \ 474 physical_freeend -= ((np) * PAGE_SIZE); \ 475 if (physical_freeend < physical_freestart) \ 476 panic("initarm: out of memory"); \ 477 (var) = physical_freeend; \ 478 free_pages -= (np); \ 479 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 480 481 loop1 = 0; 482 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 483 /* Are we 16KB aligned for an L1 ? */ 484 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 485 && kernel_l1pt.pv_pa == 0) { 486 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 487 } else { 488 valloc_pages(kernel_pt_table[loop1], 489 L2_TABLE_SIZE / PAGE_SIZE); 490 ++loop1; 491 } 492 } 493 494 /* This should never be able to happen but better confirm that. */ 495 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 496 panic("initarm: Failed to align the kernel page directory"); 497 498 /* 499 * Allocate a page for the system page mapped to V0x00000000 500 * This page will just contain the system vectors and can be 501 * shared by all processes. 502 */ 503 alloc_pages(systempage.pv_pa, 1); 504 505 /* Allocate stacks for all modes */ 506 valloc_pages(irqstack, IRQ_STACK_SIZE); 507 valloc_pages(abtstack, ABT_STACK_SIZE); 508 valloc_pages(undstack, UND_STACK_SIZE); 509 valloc_pages(kernelstack, UPAGES); 510 511 /* Allocate enough pages for cleaning the Mini-Data cache. */ 512 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 513 valloc_pages(minidataclean, 1); 514 515 #ifdef VERBOSE_INIT_ARM 516 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 517 irqstack.pv_va); 518 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 519 abtstack.pv_va); 520 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 521 undstack.pv_va); 522 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 523 kernelstack.pv_va); 524 #endif 525 526 /* 527 * XXX Defer this to later so that we can reclaim the memory 528 * XXX used by the RedBoot page tables. 529 */ 530 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 531 532 /* 533 * Ok we have allocated physical pages for the primary kernel 534 * page tables 535 */ 536 537 #ifdef VERBOSE_INIT_ARM 538 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 539 #endif 540 541 /* 542 * Now we start construction of the L1 page table 543 * We start by mapping the L2 page tables into the L1. 544 * This means that we can replace L1 mappings later on if necessary 545 */ 546 l1pagetable = kernel_l1pt.pv_pa; 547 548 /* Map the L2 pages tables in the L1 page table */ 549 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 550 &kernel_pt_table[KERNEL_PT_SYS]); 551 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 552 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 553 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 554 pmap_link_l2pt(l1pagetable, IQ80310_IOPXS_VBASE, 555 &kernel_pt_table[KERNEL_PT_IOPXS]); 556 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 557 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 558 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 559 560 /* update the top of the kernel VM */ 561 pmap_curmaxkvaddr = 562 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 563 564 #ifdef VERBOSE_INIT_ARM 565 printf("Mapping kernel\n"); 566 #endif 567 568 /* Now we fill in the L2 pagetable for the kernel static code/data */ 569 { 570 extern char etext[], _end[]; 571 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 572 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 573 u_int logical; 574 575 textsize = (textsize + PGOFSET) & ~PGOFSET; 576 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 577 578 logical = 0x00200000; /* offset of kernel in RAM */ 579 580 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 581 physical_start + logical, textsize, 582 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 583 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 584 physical_start + logical, totalsize - textsize, 585 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 586 } 587 588 #ifdef VERBOSE_INIT_ARM 589 printf("Constructing L2 page tables\n"); 590 #endif 591 592 /* Map the stack pages */ 593 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 594 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 595 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 596 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 597 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 598 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 599 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 600 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 601 602 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 603 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 604 605 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 606 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 607 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 608 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 609 } 610 611 /* Map the Mini-Data cache clean area. */ 612 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 613 minidataclean.pv_pa); 614 615 /* Map the vector page. */ 616 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 617 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 618 619 /* Map the statically mapped devices. */ 620 pmap_devmap_bootstrap(l1pagetable, iq80310_devmap); 621 622 /* 623 * Give the XScale global cache clean code an appropriately 624 * sized chunk of unmapped VA space starting at 0xff000000 625 * (our device mappings end before this address). 626 */ 627 xscale_cache_clean_addr = 0xff000000U; 628 629 /* 630 * Now we have the real page tables in place so we can switch to them. 631 * Once this is done we will be running with the REAL kernel page 632 * tables. 633 */ 634 635 /* 636 * Update the physical_freestart/physical_freeend/free_pages 637 * variables. 638 */ 639 { 640 extern char _end[]; 641 642 physical_freestart = physical_start + 643 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 644 KERNEL_BASE); 645 physical_freeend = physical_end; 646 free_pages = 647 (physical_freeend - physical_freestart) / PAGE_SIZE; 648 } 649 650 /* Switch tables */ 651 #ifdef VERBOSE_INIT_ARM 652 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 653 physical_freestart, free_pages, free_pages); 654 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 655 #endif 656 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 657 cpu_setttb(kernel_l1pt.pv_pa, true); 658 cpu_tlb_flushID(); 659 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 660 661 /* 662 * Moved from cpu_startup() as data_abort_handler() references 663 * this during uvm init 664 */ 665 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 666 667 #ifdef VERBOSE_INIT_ARM 668 printf("done!\n"); 669 #endif 670 671 #ifdef VERBOSE_INIT_ARM 672 printf("bootstrap done.\n"); 673 #endif 674 675 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 676 677 /* 678 * Pages were allocated during the secondary bootstrap for the 679 * stacks for different CPU modes. 680 * We must now set the r13 registers in the different CPU modes to 681 * point to these stacks. 682 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 683 * of the stack memory. 684 */ 685 #ifdef VERBOSE_INIT_ARM 686 printf("init subsystems: stacks "); 687 #endif 688 689 set_stackptr(PSR_IRQ32_MODE, 690 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 691 set_stackptr(PSR_ABT32_MODE, 692 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 693 set_stackptr(PSR_UND32_MODE, 694 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 695 696 /* 697 * Well we should set a data abort handler. 698 * Once things get going this will change as we will need a proper 699 * handler. 700 * Until then we will use a handler that just panics but tells us 701 * why. 702 * Initialisation of the vectors will just panic on a data abort. 703 * This just fills in a slightly better one. 704 */ 705 #ifdef VERBOSE_INIT_ARM 706 printf("vectors "); 707 #endif 708 data_abort_handler_address = (u_int)data_abort_handler; 709 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 710 undefined_handler_address = (u_int)undefinedinstruction_bounce; 711 712 /* Initialise the undefined instruction handlers */ 713 #ifdef VERBOSE_INIT_ARM 714 printf("undefined "); 715 #endif 716 undefined_init(); 717 718 /* Load memory into UVM. */ 719 #ifdef VERBOSE_INIT_ARM 720 printf("page "); 721 #endif 722 uvm_md_init(); 723 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 724 atop(physical_freestart), atop(physical_freeend), 725 VM_FREELIST_DEFAULT); 726 727 /* Boot strap pmap telling it where managed kernel virtual memory is */ 728 #ifdef VERBOSE_INIT_ARM 729 printf("pmap "); 730 #endif 731 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 732 733 /* Setup the IRQ system */ 734 #ifdef VERBOSE_INIT_ARM 735 printf("irq "); 736 #endif 737 iq80310_intr_init(); 738 739 #ifdef VERBOSE_INIT_ARM 740 printf("done.\n"); 741 #endif 742 743 #ifdef DDB 744 db_machine_init(); 745 if (boothowto & RB_KDB) 746 Debugger(); 747 #endif 748 749 /* We return the new stack pointer address */ 750 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 751 } 752 753 void 754 consinit(void) 755 { 756 static const bus_addr_t comcnaddrs[] = { 757 IQ80310_UART2, /* com0 (J9) */ 758 IQ80310_UART1, /* com1 (J10) */ 759 }; 760 static int consinit_called; 761 762 if (consinit_called != 0) 763 return; 764 765 consinit_called = 1; 766 767 /* 768 * Console devices are mapped VA==PA. Our devmap reflects 769 * this, so register it now so drivers can map the console 770 * device. 771 */ 772 pmap_devmap_register(iq80310_devmap); 773 774 #if NCOM > 0 775 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 776 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 777 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 778 #else 779 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 780 #endif 781 } 782
Indexes created Wed Oct 22 13:09:56 GMT 2025