iq80310_machdep.c revision 1.94.4.1
1 /* $NetBSD: iq80310_machdep.c,v 1.94.4.1 2023/10/14 06:52:16 martin 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 1.94.4.1 2023/10/14 06:52:16 martin 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 { 267 IQ80310_OBIO_BASE, 268 IQ80310_OBIO_BASE, 269 IQ80310_OBIO_SIZE, 270 VM_PROT_READ|VM_PROT_WRITE, 271 PTE_NOCACHE, 272 }, 273 { 274 IQ80310_PIOW_VBASE, 275 I80312_PCI_XLATE_PIOW_BASE, 276 I80312_PCI_XLATE_IOSIZE, 277 VM_PROT_READ|VM_PROT_WRITE, 278 PTE_NOCACHE, 279 }, 280 { 281 IQ80310_SIOW_VBASE, 282 I80312_PCI_XLATE_SIOW_BASE, 283 I80312_PCI_XLATE_IOSIZE, 284 VM_PROT_READ|VM_PROT_WRITE, 285 PTE_NOCACHE, 286 }, 287 { 288 IQ80310_80312_VBASE, 289 I80312_PMMR_BASE, 290 I80312_PMMR_SIZE, 291 VM_PROT_READ|VM_PROT_WRITE, 292 PTE_NOCACHE, 293 }, 294 295 { 296 0, 297 0, 298 0, 299 0, 300 0, 301 } 302 }; 303 304 /* 305 * vaddr_t initarm(...) 306 * 307 * Initial entry point on startup. This gets called before main() is 308 * entered. 309 * It should be responsible for setting up everything that must be 310 * in place when main is called. 311 * This includes 312 * Taking a copy of the boot configuration structure. 313 * Initialising the physical console so characters can be printed. 314 * Setting up page tables for the kernel 315 * Relocating the kernel to the bottom of physical memory 316 */ 317 vaddr_t 318 initarm(void *arg) 319 { 320 int loop; 321 int loop1; 322 u_int l1pagetable; 323 paddr_t memstart; 324 psize_t memsize; 325 326 /* 327 * Clear out the 7-segment display. Whee, the first visual 328 * indication that we're running kernel code. 329 */ 330 iq80310_7seg(' ', ' '); 331 332 /* 333 * Heads up ... Setup the CPU / MMU / TLB functions 334 */ 335 if (set_cpufuncs()) 336 panic("CPU not recognized!"); 337 338 /* Calibrate the delay loop. */ 339 iq80310_calibrate_delay(); 340 341 /* 342 * Since we map the on-board devices VA==PA, and the kernel 343 * is running VA==PA, it's possible for us to initialize 344 * the console now. 345 */ 346 consinit(); 347 348 #ifdef VERBOSE_INIT_ARM 349 /* Talk to the user */ 350 printf("\nNetBSD/evbarm (IQ80310) booting ...\n"); 351 #endif 352 353 /* 354 * Reset the secondary PCI bus. RedBoot doesn't stop devices 355 * on the PCI bus before handing us control, so we have to 356 * do this. 357 * 358 * XXX This is arguably a bug in RedBoot, and doing this reset 359 * XXX could be problematic in the future if we encounter an 360 * XXX application where the PPB in the i80312 is used as a 361 * XXX PPB. 362 */ 363 { 364 uint32_t reg; 365 366 #ifdef VERBOSE_INIT_ARM 367 printf("Resetting secondary PCI bus...\n"); 368 #endif 369 reg = bus_space_read_4(&obio_bs_tag, 370 I80312_PMMR_BASE + I80312_PPB_BASE, PCI_BRIDGE_CONTROL_REG); 371 bus_space_write_4(&obio_bs_tag, 372 I80312_PMMR_BASE + I80312_PPB_BASE, PCI_BRIDGE_CONTROL_REG, 373 reg | PCI_BRIDGE_CONTROL_SECBR); 374 delay(10 * 1000); /* 10ms enough? */ 375 bus_space_write_4(&obio_bs_tag, 376 I80312_PMMR_BASE + I80312_PPB_BASE, PCI_BRIDGE_CONTROL_REG, 377 reg); 378 } 379 380 /* 381 * We are currently running with the MMU enabled and the 382 * entire address space mapped VA==PA, except for the 383 * first 64M of RAM is also double-mapped at 0xc0000000. 384 * There is an L1 page table at 0xa0004000. 385 */ 386 387 /* 388 * Fetch the SDRAM start/size from the i80312 SDRAM configuration 389 * registers. 390 */ 391 i80312_sdram_bounds(&obio_bs_tag, I80312_PMMR_BASE + I80312_MEM_BASE, 392 &memstart, &memsize); 393 394 #ifdef VERBOSE_INIT_ARM 395 printf("initarm: Configuring system ...\n"); 396 #endif 397 398 /* Fake bootconfig structure for the benefit of pmap.c */ 399 /* XXX must make the memory description h/w independent */ 400 bootconfig.dramblocks = 1; 401 bootconfig.dram[0].address = memstart; 402 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 403 404 /* 405 * Set up the variables that define the availability of 406 * physical memory. For now, we're going to set 407 * physical_freestart to 0xa0200000 (where the kernel 408 * was loaded), and allocate the memory we need downwards. 409 * If we get too close to the L1 table that we set up, we 410 * will panic. We will update physical_freestart and 411 * physical_freeend later to reflect what pmap_bootstrap() 412 * wants to see. 413 * 414 * XXX pmap_bootstrap() needs an enema. 415 */ 416 physical_start = bootconfig.dram[0].address; 417 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 418 419 physical_freestart = 0xa0009000UL; 420 physical_freeend = 0xa0200000UL; 421 422 physmem = (physical_end - physical_start) / PAGE_SIZE; 423 424 #ifdef VERBOSE_INIT_ARM 425 /* Tell the user about the memory */ 426 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 427 physical_start, physical_end - 1); 428 #endif 429 430 /* 431 * Okay, the kernel starts 2MB in from the bottom of physical 432 * memory. We are going to allocate our bootstrap pages downwards 433 * from there. 434 * 435 * We need to allocate some fixed page tables to get the kernel 436 * going. We allocate one page directory and a number of page 437 * tables and store the physical addresses in the kernel_pt_table 438 * array. 439 * 440 * The kernel page directory must be on a 16K boundary. The page 441 * tables must be on 4K boundaries. What we do is allocate the 442 * page directory on the first 16K boundary that we encounter, and 443 * the page tables on 4K boundaries otherwise. Since we allocate 444 * at least 3 L2 page tables, we are guaranteed to encounter at 445 * least one 16K aligned region. 446 */ 447 448 #ifdef VERBOSE_INIT_ARM 449 printf("Allocating page tables\n"); 450 #endif 451 452 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 453 454 #ifdef VERBOSE_INIT_ARM 455 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 456 physical_freestart, free_pages, free_pages); 457 #endif 458 459 /* Define a macro to simplify memory allocation */ 460 #define valloc_pages(var, np) \ 461 alloc_pages((var).pv_pa, (np)); \ 462 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 463 464 #define alloc_pages(var, np) \ 465 physical_freeend -= ((np) * PAGE_SIZE); \ 466 if (physical_freeend < physical_freestart) \ 467 panic("initarm: out of memory"); \ 468 (var) = physical_freeend; \ 469 free_pages -= (np); \ 470 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 471 472 loop1 = 0; 473 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 474 /* Are we 16KB aligned for an L1 ? */ 475 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 476 && kernel_l1pt.pv_pa == 0) { 477 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 478 } else { 479 valloc_pages(kernel_pt_table[loop1], 480 L2_TABLE_SIZE / PAGE_SIZE); 481 ++loop1; 482 } 483 } 484 485 /* This should never be able to happen but better confirm that. */ 486 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 487 panic("initarm: Failed to align the kernel page directory"); 488 489 /* 490 * Allocate a page for the system page mapped to V0x00000000 491 * This page will just contain the system vectors and can be 492 * shared by all processes. 493 */ 494 alloc_pages(systempage.pv_pa, 1); 495 496 /* Allocate stacks for all modes */ 497 valloc_pages(irqstack, IRQ_STACK_SIZE); 498 valloc_pages(abtstack, ABT_STACK_SIZE); 499 valloc_pages(undstack, UND_STACK_SIZE); 500 valloc_pages(kernelstack, UPAGES); 501 502 /* Allocate enough pages for cleaning the Mini-Data cache. */ 503 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 504 valloc_pages(minidataclean, 1); 505 506 #ifdef VERBOSE_INIT_ARM 507 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 508 irqstack.pv_va); 509 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 510 abtstack.pv_va); 511 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 512 undstack.pv_va); 513 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 514 kernelstack.pv_va); 515 #endif 516 517 /* 518 * XXX Defer this to later so that we can reclaim the memory 519 * XXX used by the RedBoot page tables. 520 */ 521 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 522 523 /* 524 * Ok we have allocated physical pages for the primary kernel 525 * page tables 526 */ 527 528 #ifdef VERBOSE_INIT_ARM 529 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 530 #endif 531 532 /* 533 * Now we start construction of the L1 page table 534 * We start by mapping the L2 page tables into the L1. 535 * This means that we can replace L1 mappings later on if necessary 536 */ 537 l1pagetable = kernel_l1pt.pv_pa; 538 539 /* Map the L2 pages tables in the L1 page table */ 540 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 541 &kernel_pt_table[KERNEL_PT_SYS]); 542 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 543 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 544 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 545 pmap_link_l2pt(l1pagetable, IQ80310_IOPXS_VBASE, 546 &kernel_pt_table[KERNEL_PT_IOPXS]); 547 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 548 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 549 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 550 551 /* update the top of the kernel VM */ 552 pmap_curmaxkvaddr = 553 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 554 555 #ifdef VERBOSE_INIT_ARM 556 printf("Mapping kernel\n"); 557 #endif 558 559 /* Now we fill in the L2 pagetable for the kernel static code/data */ 560 { 561 extern char etext[], _end[]; 562 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 563 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 564 u_int logical; 565 566 textsize = (textsize + PGOFSET) & ~PGOFSET; 567 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 568 569 logical = 0x00200000; /* offset of kernel in RAM */ 570 571 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 572 physical_start + logical, textsize, 573 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 574 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 575 physical_start + logical, totalsize - textsize, 576 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 577 } 578 579 #ifdef VERBOSE_INIT_ARM 580 printf("Constructing L2 page tables\n"); 581 #endif 582 583 /* Map the stack pages */ 584 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 585 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 586 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 587 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 588 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 589 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 590 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 591 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 592 593 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 594 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 595 596 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 597 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 598 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 599 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 600 } 601 602 /* Map the Mini-Data cache clean area. */ 603 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 604 minidataclean.pv_pa); 605 606 /* Map the vector page. */ 607 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 608 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 609 610 /* Map the statically mapped devices. */ 611 pmap_devmap_bootstrap(l1pagetable, iq80310_devmap); 612 613 /* 614 * Give the XScale global cache clean code an appropriately 615 * sized chunk of unmapped VA space starting at 0xff000000 616 * (our device mappings end before this address). 617 */ 618 xscale_cache_clean_addr = 0xff000000U; 619 620 /* 621 * Now we have the real page tables in place so we can switch to them. 622 * Once this is done we will be running with the REAL kernel page 623 * tables. 624 */ 625 626 /* 627 * Update the physical_freestart/physical_freeend/free_pages 628 * variables. 629 */ 630 { 631 extern char _end[]; 632 633 physical_freestart = physical_start + 634 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 635 KERNEL_BASE); 636 physical_freeend = physical_end; 637 free_pages = 638 (physical_freeend - physical_freestart) / PAGE_SIZE; 639 } 640 641 /* Switch tables */ 642 #ifdef VERBOSE_INIT_ARM 643 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 644 physical_freestart, free_pages, free_pages); 645 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 646 #endif 647 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 648 cpu_setttb(kernel_l1pt.pv_pa, true); 649 cpu_tlb_flushID(); 650 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 651 652 /* 653 * Moved from cpu_startup() as data_abort_handler() references 654 * this during uvm init 655 */ 656 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 657 658 #ifdef VERBOSE_INIT_ARM 659 printf("done!\n"); 660 #endif 661 662 #ifdef VERBOSE_INIT_ARM 663 printf("bootstrap done.\n"); 664 #endif 665 666 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 667 668 /* 669 * Pages were allocated during the secondary bootstrap for the 670 * stacks for different CPU modes. 671 * We must now set the r13 registers in the different CPU modes to 672 * point to these stacks. 673 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 674 * of the stack memory. 675 */ 676 #ifdef VERBOSE_INIT_ARM 677 printf("init subsystems: stacks "); 678 #endif 679 680 set_stackptr(PSR_IRQ32_MODE, 681 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 682 set_stackptr(PSR_ABT32_MODE, 683 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 684 set_stackptr(PSR_UND32_MODE, 685 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 686 687 /* 688 * Well we should set a data abort handler. 689 * Once things get going this will change as we will need a proper 690 * handler. 691 * Until then we will use a handler that just panics but tells us 692 * why. 693 * Initialisation of the vectors will just panic on a data abort. 694 * This just fills in a slightly better one. 695 */ 696 #ifdef VERBOSE_INIT_ARM 697 printf("vectors "); 698 #endif 699 data_abort_handler_address = (u_int)data_abort_handler; 700 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 701 undefined_handler_address = (u_int)undefinedinstruction_bounce; 702 703 /* Initialise the undefined instruction handlers */ 704 #ifdef VERBOSE_INIT_ARM 705 printf("undefined "); 706 #endif 707 undefined_init(); 708 709 /* Load memory into UVM. */ 710 #ifdef VERBOSE_INIT_ARM 711 printf("page "); 712 #endif 713 uvm_md_init(); 714 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 715 atop(physical_freestart), atop(physical_freeend), 716 VM_FREELIST_DEFAULT); 717 718 /* Boot strap pmap telling it where managed kernel virtual memory is */ 719 #ifdef VERBOSE_INIT_ARM 720 printf("pmap "); 721 #endif 722 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 723 724 /* Setup the IRQ system */ 725 #ifdef VERBOSE_INIT_ARM 726 printf("irq "); 727 #endif 728 iq80310_intr_init(); 729 730 #ifdef VERBOSE_INIT_ARM 731 printf("done.\n"); 732 #endif 733 734 #ifdef DDB 735 db_machine_init(); 736 if (boothowto & RB_KDB) 737 Debugger(); 738 #endif 739 740 /* We return the new stack pointer address */ 741 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 742 } 743 744 void 745 consinit(void) 746 { 747 static const bus_addr_t comcnaddrs[] = { 748 IQ80310_UART2, /* com0 (J9) */ 749 IQ80310_UART1, /* com1 (J10) */ 750 }; 751 static int consinit_called; 752 753 if (consinit_called != 0) 754 return; 755 756 consinit_called = 1; 757 758 /* 759 * Console devices are mapped VA==PA. Our devmap reflects 760 * this, so register it now so drivers can map the console 761 * device. 762 */ 763 pmap_devmap_register(iq80310_devmap); 764 765 #if NCOM > 0 766 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 767 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 768 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 769 #else 770 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 771 #endif 772 } 773
Indexes created Sun Oct 26 21:10:03 GMT 2025