1 /* $NetBSD: iq80310_machdep.c,v 1.97 2024/02/20 23:36:02 andvar 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 1.97 2024/02/20 23:36:02 andvar Exp $"); 77 78 #include "opt_arm_debug.h" 79 #include "opt_console.h" 80 #include "opt_ddb.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 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 150 151 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 152 #define KERNEL_PT_KERNEL_NUM 4 153 154 /* L2 table for mapping i80312 */ 155 #define KERNEL_PT_IOPXS (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 156 157 /* L2 tables for mapping kernel VM */ 158 #define KERNEL_PT_VMDATA (KERNEL_PT_IOPXS + 1) 159 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 160 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 161 162 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 163 164 /* Prototypes */ 165 166 void consinit(void); 167 168 #include "com.h" 169 #if NCOM > 0 170 #include <dev/ic/comreg.h> 171 #include <dev/ic/comvar.h> 172 #endif 173 174 /* 175 * Define the default console speed for the board. This is generally 176 * what the firmware provided with the board defaults to. 177 */ 178 #ifndef CONSPEED 179 #define CONSPEED B115200 180 #endif /* ! CONSPEED */ 181 182 #ifndef CONUNIT 183 #define CONUNIT 0 184 #endif 185 186 #ifndef CONMODE 187 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 188 #endif 189 190 int comcnspeed = CONSPEED; 191 int comcnmode = CONMODE; 192 int comcnunit = CONUNIT; 193 194 /* 195 * void cpu_reboot(int howto, char *bootstr) 196 * 197 * Reboots the system 198 * 199 * Deal with any syncing, unmounting, dumping and shutdown hooks, 200 * then reset the CPU. 201 */ 202 void 203 cpu_reboot(int howto, char *bootstr) 204 { 205 206 /* 207 * If we are still cold then hit the air brakes 208 * and crash to earth fast 209 */ 210 if (cold) { 211 doshutdownhooks(); 212 pmf_system_shutdown(boothowto); 213 printf("The operating system has halted.\n"); 214 printf("Please press any key to reboot.\n\n"); 215 cngetc(); 216 printf("rebooting...\n"); 217 cpu_reset(); 218 /*NOTREACHED*/ 219 } 220 221 /* Disable console buffering */ 222 223 /* 224 * If RB_NOSYNC was not specified sync the discs. 225 * Note: Unless cold is set to 1 here, syslogd will die during the 226 * unmount. It looks like syslogd is getting woken up only to find 227 * that it cannot page part of the binary in as the filesystem has 228 * been unmounted. 229 */ 230 if (!(howto & RB_NOSYNC)) 231 bootsync(); 232 233 /* Say NO to interrupts */ 234 splhigh(); 235 236 /* Do a dump if requested. */ 237 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 238 dumpsys(); 239 240 /* Run any shutdown hooks */ 241 doshutdownhooks(); 242 243 pmf_system_shutdown(boothowto); 244 245 /* Make sure IRQ's are disabled */ 246 IRQdisable; 247 248 if (howto & RB_HALT) { 249 iq80310_7seg('.', '.'); 250 printf("The operating system has halted.\n"); 251 printf("Please press any key to reboot.\n\n"); 252 cngetc(); 253 } 254 255 printf("rebooting...\n"); 256 cpu_reset(); 257 /*NOTREACHED*/ 258 } 259 260 /* Static device mappings. */ 261 static const struct pmap_devmap iq80310_devmap[] = { 262 /* 263 * Map the on-board devices VA == PA so that we can access them 264 * with the MMU on or off. 265 */ 266 DEVMAP_ENTRY( 267 IQ80310_OBIO_BASE, 268 IQ80310_OBIO_BASE, 269 IQ80310_OBIO_SIZE 270 ), 271 DEVMAP_ENTRY( 272 IQ80310_PIOW_VBASE, 273 I80312_PCI_XLATE_PIOW_BASE, 274 I80312_PCI_XLATE_IOSIZE 275 ), 276 DEVMAP_ENTRY( 277 IQ80310_SIOW_VBASE, 278 I80312_PCI_XLATE_SIOW_BASE, 279 I80312_PCI_XLATE_IOSIZE 280 ), 281 DEVMAP_ENTRY( 282 IQ80310_80312_VBASE, 283 I80312_PMMR_BASE, 284 I80312_PMMR_SIZE 285 ), 286 287 DEVMAP_ENTRY_END 288 }; 289 290 /* 291 * vaddr_t initarm(...) 292 * 293 * Initial entry point on startup. This gets called before main() is 294 * entered. 295 * It should be responsible for setting up everything that must be 296 * in place when main is called. 297 * This includes 298 * Taking a copy of the boot configuration structure. 299 * Initialising the physical console so characters can be printed. 300 * Setting up page tables for the kernel 301 * Relocating the kernel to the bottom of physical memory 302 */ 303 vaddr_t 304 initarm(void *arg) 305 { 306 int loop; 307 int loop1; 308 u_int l1pagetable; 309 paddr_t memstart; 310 psize_t memsize; 311 312 /* 313 * Clear out the 7-segment display. Whee, the first visual 314 * indication that we're running kernel code. 315 */ 316 iq80310_7seg(' ', ' '); 317 318 /* 319 * Heads up ... Setup the CPU / MMU / TLB functions 320 */ 321 if (set_cpufuncs()) 322 panic("CPU not recognized!"); 323 324 /* Calibrate the delay loop. */ 325 iq80310_calibrate_delay(); 326 327 /* 328 * Since we map the on-board devices VA==PA, and the kernel 329 * is running VA==PA, it's possible for us to initialize 330 * the console now. 331 */ 332 consinit(); 333 334 #ifdef VERBOSE_INIT_ARM 335 /* Talk to the user */ 336 printf("\nNetBSD/evbarm (IQ80310) booting ...\n"); 337 #endif 338 339 /* 340 * Reset the secondary PCI bus. RedBoot doesn't stop devices 341 * on the PCI bus before handing us control, so we have to 342 * do this. 343 * 344 * XXX This is arguably a bug in RedBoot, and doing this reset 345 * XXX could be problematic in the future if we encounter an 346 * XXX application where the PPB in the i80312 is used as a 347 * XXX PPB. 348 */ 349 { 350 uint32_t reg; 351 352 #ifdef VERBOSE_INIT_ARM 353 printf("Resetting secondary PCI bus...\n"); 354 #endif 355 reg = bus_space_read_4(&obio_bs_tag, 356 I80312_PMMR_BASE + I80312_PPB_BASE, PCI_BRIDGE_CONTROL_REG); 357 bus_space_write_4(&obio_bs_tag, 358 I80312_PMMR_BASE + I80312_PPB_BASE, PCI_BRIDGE_CONTROL_REG, 359 reg | PCI_BRIDGE_CONTROL_SECBR); 360 delay(10 * 1000); /* 10ms enough? */ 361 bus_space_write_4(&obio_bs_tag, 362 I80312_PMMR_BASE + I80312_PPB_BASE, PCI_BRIDGE_CONTROL_REG, 363 reg); 364 } 365 366 /* 367 * We are currently running with the MMU enabled and the 368 * entire address space mapped VA==PA, except for the 369 * first 64M of RAM is also double-mapped at 0xc0000000. 370 * There is an L1 page table at 0xa0004000. 371 */ 372 373 /* 374 * Fetch the SDRAM start/size from the i80312 SDRAM configuration 375 * registers. 376 */ 377 i80312_sdram_bounds(&obio_bs_tag, I80312_PMMR_BASE + I80312_MEM_BASE, 378 &memstart, &memsize); 379 380 #ifdef VERBOSE_INIT_ARM 381 printf("initarm: Configuring system ...\n"); 382 #endif 383 384 /* Fake bootconfig structure for the benefit of pmap.c */ 385 /* XXX must make the memory description h/w independent */ 386 bootconfig.dramblocks = 1; 387 bootconfig.dram[0].address = memstart; 388 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 389 390 /* 391 * Set up the variables that define the availability of 392 * physical memory. For now, we're going to set 393 * physical_freestart to 0xa0200000 (where the kernel 394 * was loaded), and allocate the memory we need downwards. 395 * If we get too close to the L1 table that we set up, we 396 * will panic. We will update physical_freestart and 397 * physical_freeend later to reflect what pmap_bootstrap() 398 * wants to see. 399 * 400 * XXX pmap_bootstrap() needs an enema. 401 */ 402 physical_start = bootconfig.dram[0].address; 403 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 404 405 physical_freestart = 0xa0009000UL; 406 physical_freeend = 0xa0200000UL; 407 408 physmem = (physical_end - physical_start) / PAGE_SIZE; 409 410 #ifdef VERBOSE_INIT_ARM 411 /* Tell the user about the memory */ 412 printf("physmemory: 0x%"PRIxPSIZE" pages at 0x%08lx -> 0x%08lx\n", physmem, 413 physical_start, physical_end - 1); 414 #endif 415 416 /* 417 * Okay, the kernel starts 2MB in from the bottom of physical 418 * memory. We are going to allocate our bootstrap pages downwards 419 * from there. 420 * 421 * We need to allocate some fixed page tables to get the kernel 422 * going. We allocate one page directory and a number of page 423 * tables and store the physical addresses in the kernel_pt_table 424 * array. 425 * 426 * The kernel page directory must be on a 16K boundary. The page 427 * tables must be on 4K boundaries. What we do is allocate the 428 * page directory on the first 16K boundary that we encounter, and 429 * the page tables on 4K boundaries otherwise. Since we allocate 430 * at least 3 L2 page tables, we are guaranteed to encounter at 431 * least one 16K aligned region. 432 */ 433 434 #ifdef VERBOSE_INIT_ARM 435 printf("Allocating page tables\n"); 436 #endif 437 438 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 439 440 #ifdef VERBOSE_INIT_ARM 441 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 442 physical_freestart, free_pages, free_pages); 443 #endif 444 445 /* Define a macro to simplify memory allocation */ 446 #define valloc_pages(var, np) \ 447 alloc_pages((var).pv_pa, (np)); \ 448 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 449 450 #define alloc_pages(var, np) \ 451 physical_freeend -= ((np) * PAGE_SIZE); \ 452 if (physical_freeend < physical_freestart) \ 453 panic("initarm: out of memory"); \ 454 (var) = physical_freeend; \ 455 free_pages -= (np); \ 456 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 457 458 loop1 = 0; 459 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 460 /* Are we 16KB aligned for an L1 ? */ 461 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 462 && kernel_l1pt.pv_pa == 0) { 463 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 464 } else { 465 valloc_pages(kernel_pt_table[loop1], 466 L2_TABLE_SIZE / PAGE_SIZE); 467 ++loop1; 468 } 469 } 470 471 /* This should never be able to happen but better confirm that. */ 472 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 473 panic("initarm: Failed to align the kernel page directory"); 474 475 /* 476 * Allocate a page for the system page mapped to V0x00000000 477 * This page will just contain the system vectors and can be 478 * shared by all processes. 479 */ 480 alloc_pages(systempage.pv_pa, 1); 481 482 /* Allocate stacks for all modes */ 483 valloc_pages(irqstack, IRQ_STACK_SIZE); 484 valloc_pages(abtstack, ABT_STACK_SIZE); 485 valloc_pages(undstack, UND_STACK_SIZE); 486 valloc_pages(kernelstack, UPAGES); 487 488 /* Allocate enough pages for cleaning the Mini-Data cache. */ 489 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 490 valloc_pages(minidataclean, 1); 491 492 #ifdef VERBOSE_INIT_ARM 493 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 494 irqstack.pv_va); 495 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 496 abtstack.pv_va); 497 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 498 undstack.pv_va); 499 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 500 kernelstack.pv_va); 501 #endif 502 503 /* 504 * XXX Defer this to later so that we can reclaim the memory 505 * XXX used by the RedBoot page tables. 506 */ 507 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 508 509 /* 510 * Ok we have allocated physical pages for the primary kernel 511 * page tables 512 */ 513 514 #ifdef VERBOSE_INIT_ARM 515 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 516 #endif 517 518 /* 519 * Now we start construction of the L1 page table 520 * We start by mapping the L2 page tables into the L1. 521 * This means that we can replace L1 mappings later on if necessary 522 */ 523 l1pagetable = kernel_l1pt.pv_pa; 524 525 /* Map the L2 pages tables in the L1 page table */ 526 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 527 &kernel_pt_table[KERNEL_PT_SYS]); 528 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 529 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 530 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 531 pmap_link_l2pt(l1pagetable, IQ80310_IOPXS_VBASE, 532 &kernel_pt_table[KERNEL_PT_IOPXS]); 533 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 534 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 535 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 536 537 /* update the top of the kernel VM */ 538 pmap_curmaxkvaddr = 539 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 540 541 #ifdef VERBOSE_INIT_ARM 542 printf("Mapping kernel\n"); 543 #endif 544 545 /* Now we fill in the L2 pagetable for the kernel static code/data */ 546 { 547 extern char etext[], _end[]; 548 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 549 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 550 u_int logical; 551 552 textsize = (textsize + PGOFSET) & ~PGOFSET; 553 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 554 555 logical = 0x00200000; /* offset of kernel in RAM */ 556 557 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 558 physical_start + logical, textsize, 559 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 560 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 561 physical_start + logical, totalsize - textsize, 562 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 563 } 564 565 #ifdef VERBOSE_INIT_ARM 566 printf("Constructing L2 page tables\n"); 567 #endif 568 569 /* Map the stack pages */ 570 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 571 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 572 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 573 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 574 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 575 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 576 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 577 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 578 579 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 580 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 581 582 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 583 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 584 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 585 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 586 } 587 588 /* Map the Mini-Data cache clean area. */ 589 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 590 minidataclean.pv_pa); 591 592 /* Map the vector page. */ 593 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 594 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 595 596 /* Map the statically mapped devices. */ 597 pmap_devmap_bootstrap(l1pagetable, iq80310_devmap); 598 599 /* 600 * Give the XScale global cache clean code an appropriately 601 * sized chunk of unmapped VA space starting at 0xff000000 602 * (our device mappings end before this address). 603 */ 604 xscale_cache_clean_addr = 0xff000000U; 605 606 /* 607 * Now we have the real page tables in place so we can switch to them. 608 * Once this is done we will be running with the REAL kernel page 609 * tables. 610 */ 611 612 /* 613 * Update the physical_freestart/physical_freeend/free_pages 614 * variables. 615 */ 616 { 617 extern char _end[]; 618 619 physical_freestart = physical_start + 620 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 621 KERNEL_BASE); 622 physical_freeend = physical_end; 623 free_pages = 624 (physical_freeend - physical_freestart) / PAGE_SIZE; 625 } 626 627 /* Switch tables */ 628 #ifdef VERBOSE_INIT_ARM 629 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 630 physical_freestart, free_pages, free_pages); 631 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 632 #endif 633 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 634 cpu_setttb(kernel_l1pt.pv_pa, true); 635 cpu_tlb_flushID(); 636 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 637 638 /* 639 * Moved from cpu_startup() as data_abort_handler() references 640 * this during uvm init 641 */ 642 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 643 644 #ifdef VERBOSE_INIT_ARM 645 printf("done!\n"); 646 #endif 647 648 #ifdef VERBOSE_INIT_ARM 649 printf("bootstrap done.\n"); 650 #endif 651 652 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 653 654 /* 655 * Pages were allocated during the secondary bootstrap for the 656 * stacks for different CPU modes. 657 * We must now set the r13 registers in the different CPU modes to 658 * point to these stacks. 659 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 660 * of the stack memory. 661 */ 662 #ifdef VERBOSE_INIT_ARM 663 printf("init subsystems: stacks "); 664 #endif 665 666 set_stackptr(PSR_IRQ32_MODE, 667 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 668 set_stackptr(PSR_ABT32_MODE, 669 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 670 set_stackptr(PSR_UND32_MODE, 671 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 672 673 /* 674 * Well we should set a data abort handler. 675 * Once things get going this will change as we will need a proper 676 * handler. 677 * Until then we will use a handler that just panics but tells us 678 * why. 679 * Initialisation of the vectors will just panic on a data abort. 680 * This just fills in a slightly better one. 681 */ 682 #ifdef VERBOSE_INIT_ARM 683 printf("vectors "); 684 #endif 685 data_abort_handler_address = (u_int)data_abort_handler; 686 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 687 undefined_handler_address = (u_int)undefinedinstruction_bounce; 688 689 /* Initialise the undefined instruction handlers */ 690 #ifdef VERBOSE_INIT_ARM 691 printf("undefined "); 692 #endif 693 undefined_init(); 694 695 /* Load memory into UVM. */ 696 #ifdef VERBOSE_INIT_ARM 697 printf("page "); 698 #endif 699 uvm_md_init(); 700 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 701 atop(physical_freestart), atop(physical_freeend), 702 VM_FREELIST_DEFAULT); 703 704 /* Boot strap pmap telling it where managed kernel virtual memory is */ 705 #ifdef VERBOSE_INIT_ARM 706 printf("pmap "); 707 #endif 708 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 709 710 /* Setup the IRQ system */ 711 #ifdef VERBOSE_INIT_ARM 712 printf("irq "); 713 #endif 714 iq80310_intr_init(); 715 716 #ifdef VERBOSE_INIT_ARM 717 printf("done.\n"); 718 #endif 719 720 #ifdef DDB 721 db_machine_init(); 722 if (boothowto & RB_KDB) 723 Debugger(); 724 #endif 725 726 /* We return the new stack pointer address */ 727 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 728 } 729 730 void 731 consinit(void) 732 { 733 static const bus_addr_t comcnaddrs[] = { 734 IQ80310_UART2, /* com0 (J9) */ 735 IQ80310_UART1, /* com1 (J10) */ 736 }; 737 static int consinit_called; 738 739 if (consinit_called != 0) 740 return; 741 742 consinit_called = 1; 743 744 /* 745 * Console devices are mapped VA==PA. Our devmap reflects 746 * this, so register it now so drivers can map the console 747 * device. 748 */ 749 pmap_devmap_register(iq80310_devmap); 750 751 #if NCOM > 0 752 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 753 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 754 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 755 #else 756 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 757 #endif 758 } 759
Indexes created Mon Oct 20 20:10:13 GMT 2025