1/* $NetBSD: iyonix_machdep.c,v 1.6 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 * Based on code written by Jason R. Thorpe and Steve C. Woodford for 8 * Wasabi Systems, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed for the NetBSD Project by 21 * Wasabi Systems, Inc. 22 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 23 * or promote products derived from this software without specific prior 24 * written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39/* 40 * Copyright (c) 1997,1998 Mark Brinicombe. 41 * Copyright (c) 1997,1998 Causality Limited. 42 * All rights reserved. 43 * 44 * Redistribution and use in source and binary forms, with or without 45 * modification, are permitted provided that the following conditions 46 * are met: 47 * 1. Redistributions of source code must retain the above copyright 48 * notice, this list of conditions and the following disclaimer. 49 * 2. Redistributions in binary form must reproduce the above copyright 50 * notice, this list of conditions and the following disclaimer in the 51 * documentation and/or other materials provided with the distribution. 52 * 3. All advertising materials mentioning features or use of this software 53 * must display the following acknowledgement: 54 * This product includes software developed by Mark Brinicombe 55 * for the NetBSD Project. 56 * 4. The name of the company nor the name of the author may be used to 57 * endorse or promote products derived from this software without specific 58 * prior written permission. 59 * 60 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 61 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 62 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 63 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 64 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 65 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 66 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 67 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 68 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 69 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 70 * SUCH DAMAGE. 71 * 72 * Machine dependent functions for kernel setup for Iyonix. 73 */ 74 75#include <sys/cdefs.h> 76__KERNEL_RCSID(0, "$NetBSD: iyonix_machdep.c,v 1.6 2024/02/20 23:36:02 andvar Exp $"); 77 78#include "opt_ddb.h" 79#include "opt_kgdb.h" 80 81#include <sys/param.h> 82#include <sys/device.h> 83#include <sys/systm.h> 84#include <sys/kernel.h> 85#include <sys/exec.h> 86#include <sys/proc.h> 87#include <sys/msgbuf.h> 88#include <sys/reboot.h> 89#include <sys/termios.h> 90#include <sys/ksyms.h> 91#include <sys/bus.h> 92#include <sys/cpu.h> 93 94#include <uvm/uvm_extern.h> 95 96#include <dev/cons.h> 97 98#include <dev/pci/ppbreg.h> 99#include <dev/ic/i8259reg.h> 100 101#include <net/if.h> 102#include <net/if_ether.h> 103 104#include <machine/db_machdep.h> 105#include <ddb/db_sym.h> 106#include <ddb/db_extern.h> 107 108#include <acorn32/include/bootconfig.h> 109#include <arm/locore.h> 110#include <arm/undefined.h> 111 112#include <arm/arm32/machdep.h> 113 114#include <arm/xscale/i80321reg.h> 115#include <arm/xscale/i80321var.h> 116 117#include <evbarm/iyonix/iyonixreg.h> 118#include <evbarm/iyonix/obiovar.h> 119 120#include <dev/wscons/wsconsio.h> 121#include <dev/wscons/wsdisplayvar.h> 122#include <dev/rasops/rasops.h> 123#include <dev/wscons/wsdisplay_vconsvar.h> 124#include <dev/wsfont/wsfont.h> 125 126#include "ksyms.h" 127 128#define KERNEL_TEXT_BASE KERNEL_BASE 129#define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 130 131struct vcons_screen rascons_console_screen; 132 133struct wsscreen_descr rascons_stdscreen = { 134 "std", 135 0, 0, /* will be filled in -- XXX shouldn't, it's global */ 136 0, 137 0, 0, 138 WSSCREEN_REVERSE 139}; 140 141/* 142 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 143 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 144 */ 145#define KERNEL_VM_SIZE 0x0C000000 146 147struct bootconfig bootconfig; /* Boot config storage */ 148 149char *boot_args; 150 151vaddr_t physical_start; 152vaddr_t physical_freestart; 153vaddr_t physical_freeend; 154vaddr_t physical_end; 155u_int free_pages; 156vaddr_t pagetables_start; 157 158/*int debug_flags;*/ 159#ifndef PMAP_STATIC_L1S 160int max_processes = 64; /* Default number */ 161#endif /* !PMAP_STATIC_L1S */ 162 163/* Physical and virtual addresses for some global pages */ 164pv_addr_t minidataclean; 165 166paddr_t msgbufphys; 167 168#define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 169 170#define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 171#define KERNEL_PT_KERNEL_NUM 4 172 173 /* L2 table for mapping i80321 */ 174#define KERNEL_PT_IOPXS (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 175 176 /* L2 tables for mapping kernel VM */ 177#define KERNEL_PT_VMDATA (KERNEL_PT_IOPXS + 1) 178#define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 179#define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 180 181pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 182 183char iyonix_macaddr[ETHER_ADDR_LEN]; 184 185char boot_consdev[16]; 186 187/* Prototypes */ 188 189void iyonix_pic_init(void); 190void iyonix_read_machineid(void); 191 192void consinit(void); 193 194static void consinit_com(const char *consdev); 195static void consinit_genfb(const char *consdev); 196static void process_kernel_args(void); 197static void parse_iyonix_bootargs(char *args); 198 199#include "com.h" 200#if NCOM > 0 201#include <dev/ic/comreg.h> 202#include <dev/ic/comvar.h> 203#endif 204 205#include "genfb.h" 206 207#if (NGENFB == 0) && (NCOM == 0) 208# error "No valid console device (com or genfb)" 209#elif defined(COMCONSOLE) || (NGENFB == 0) 210# define DEFAULT_CONSDEV "com" 211#else 212# define DEFAULT_CONSDEV "genfb" 213#endif 214 215/* 216 * Define the default console speed for the machine. 217 */ 218#ifndef CONSPEED 219#define CONSPEED B9600 220#endif /* ! CONSPEED */ 221 222#ifndef CONUNIT 223#define CONUNIT 0 224#endif 225 226#ifndef CONMODE 227#define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 228#endif 229 230int comcnspeed = CONSPEED; 231int comcnmode = CONMODE; 232int comcnunit = CONUNIT; 233 234#if KGDB 235#ifndef KGDB_DEVNAME 236#error Must define KGDB_DEVNAME 237#endif 238const char kgdb_devname[] = KGDB_DEVNAME; 239 240#ifndef KGDB_DEVADDR 241#error Must define KGDB_DEVADDR 242#endif 243unsigned long kgdb_devaddr = KGDB_DEVADDR; 244 245#ifndef KGDB_DEVRATE 246#define KGDB_DEVRATE CONSPEED 247#endif 248int kgdb_devrate = KGDB_DEVRATE; 249 250#ifndef KGDB_DEVMODE 251#define KGDB_DEVMODE CONMODE 252#endif 253int kgdb_devmode = KGDB_DEVMODE; 254#endif /* KGDB */ 255 256/* 257 * void cpu_reboot(int howto, char *bootstr) 258 * 259 * Reboots the system 260 * 261 * Deal with any syncing, unmounting, dumping and shutdown hooks, 262 * then reset the CPU. 263 */ 264void 265cpu_reboot(int howto, char *bootstr) 266{ 267 268 /* 269 * If we are still cold then hit the air brakes 270 * and crash to earth fast 271 */ 272 if (cold) { 273 doshutdownhooks(); 274 pmf_system_shutdown(boothowto); 275 printf("The operating system has halted.\n"); 276 printf("Please press any key to reboot.\n\n"); 277 cngetc(); 278 printf("rebooting...\n"); 279 goto reset; 280 } 281 282 /* Disable console buffering */ 283 284 /* 285 * If RB_NOSYNC was not specified sync the discs. 286 * Note: Unless cold is set to 1 here, syslogd will die during the 287 * unmount. It looks like syslogd is getting woken up only to find 288 * that it cannot page part of the binary in as the filesystem has 289 * been unmounted. 290 */ 291 if (!(howto & RB_NOSYNC)) 292 bootsync(); 293 294 /* Say NO to interrupts */ 295 splhigh(); 296 297 /* Do a dump if requested. */ 298 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 299 dumpsys(); 300 301 /* Run any shutdown hooks */ 302 doshutdownhooks(); 303 304 pmf_system_shutdown(boothowto); 305 306 /* Make sure IRQ's are disabled */ 307 IRQdisable; 308 309 if (howto & RB_HALT) { 310 printf("The operating system has halted.\n"); 311 printf("Please press any key to reboot.\n\n"); 312 cngetc(); 313 } 314 315 printf("rebooting...\n\r"); 316 reset: 317 /* 318 * Make really really sure that all interrupts are disabled, 319 * and poke the Internal Bus and Peripheral Bus reset lines. 320 */ 321 (void) disable_interrupts(I32_bit|F32_bit); 322 *(volatile uint32_t *)(IYONIX_80321_VBASE + VERDE_ATU_BASE + 323 ATU_PCSR) = PCSR_RIB | PCSR_RPB; 324 325 /* ...and if that didn't work, just croak. */ 326 printf("RESET FAILED!\n"); 327 for (;;); 328} 329 330/* Static device mappings. */ 331static const struct pmap_devmap iyonix_devmap[] = { 332 /* 333 * Map the on-board devices VA == PA so that we can access them 334 * with the MMU on or off. 335 */ 336 { 337 IYONIX_OBIO_BASE, 338 IYONIX_OBIO_BASE, 339 IYONIX_OBIO_SIZE, 340 VM_PROT_READ|VM_PROT_WRITE, 341 PTE_NOCACHE, 342 }, 343 344 { 345 IYONIX_IOW_VBASE, 346 VERDE_OUT_XLATE_IO_WIN0_BASE, 347 VERDE_OUT_XLATE_IO_WIN_SIZE, 348 VM_PROT_READ|VM_PROT_WRITE, 349 PTE_NOCACHE, 350 }, 351 352 { 353 IYONIX_80321_VBASE, 354 VERDE_PMMR_BASE, 355 VERDE_PMMR_SIZE, 356 VM_PROT_READ|VM_PROT_WRITE, 357 PTE_NOCACHE, 358 }, 359 360 { 361 IYONIX_FLASH_BASE, 362 IYONIX_FLASH_BASE, 363 IYONIX_FLASH_SIZE, 364 VM_PROT_READ|VM_PROT_WRITE, 365 PTE_NOCACHE, 366 }, 367 368 { 369 0, 370 0, 371 0, 372 0, 373 0, 374 } 375}; 376 377/* Read out the Machine ID from the flash, and stash it away for later use. */ 378 379void 380iyonix_read_machineid(void) 381{ 382 volatile uint32_t *flashbase = (uint32_t *)IYONIX_FLASH_BASE; 383 volatile uint16_t *flashword = (uint16_t *)IYONIX_FLASH_BASE; 384 union { 385 uint32_t w[2]; 386 uint8_t b[8]; 387 } machid; 388 389 /* Enter SecSi Sector Region */ 390 flashword[0x555] = 0xAA; 391 flashword[0x2AA] = 0x55; 392 flashword[0x555] = 0x88; 393 394 machid.w[0] = flashbase[0]; 395 machid.w[1] = flashbase[1]; 396 397 iyonix_macaddr[0] = machid.b[6]; 398 iyonix_macaddr[1] = machid.b[5]; 399 iyonix_macaddr[2] = machid.b[4]; 400 iyonix_macaddr[3] = machid.b[3]; 401 iyonix_macaddr[4] = machid.b[2]; 402 iyonix_macaddr[5] = machid.b[1]; 403 404 /* Exit SecSi Sector Region */ 405 flashword[0x555] = 0xAA; 406 flashword[0x2AA] = 0x55; 407 flashword[0x555] = 0x90; 408 flashword[0x555] = 0x00; 409} 410 411#define IYONIX_PIC_WRITE(a,v) (*((char *)IYONIX_OBIO_BASE + (a)) = (v)) 412 413void 414iyonix_pic_init(void) 415{ 416 IYONIX_PIC_WRITE(IYONIX_MASTER_PIC + PIC_ICW1, ICW1_IC4|ICW1_SELECT); 417 IYONIX_PIC_WRITE(IYONIX_MASTER_PIC + PIC_ICW2, ICW2_IRL(0)); 418 IYONIX_PIC_WRITE(IYONIX_MASTER_PIC + PIC_ICW3, ICW3_CASCADE(2)); 419 IYONIX_PIC_WRITE(IYONIX_MASTER_PIC + PIC_ICW4, ICW4_8086); 420 IYONIX_PIC_WRITE(IYONIX_MASTER_PIC + PIC_OCW1, 0x0); /* Unmask */ 421 422 IYONIX_PIC_WRITE(IYONIX_SLAVE_PIC + PIC_ICW1, ICW1_IC4|ICW1_SELECT); 423 IYONIX_PIC_WRITE(IYONIX_SLAVE_PIC + PIC_ICW2, ICW2_IRL(0)); 424 IYONIX_PIC_WRITE(IYONIX_SLAVE_PIC + PIC_ICW3, ICW3_CASCADE(1)); 425 IYONIX_PIC_WRITE(IYONIX_SLAVE_PIC + PIC_ICW4, ICW4_8086); 426 IYONIX_PIC_WRITE(IYONIX_SLAVE_PIC + PIC_OCW1, 0x0); /* Unmask */ 427 428} 429 430/* 431 * vaddr_t initarm(...) 432 * 433 * Initial entry point on startup. This gets called before main() is 434 * entered. 435 * It should be responsible for setting up everything that must be 436 * in place when main is called. 437 * This includes 438 * Taking a copy of the boot configuration structure. 439 * Initialising the physical console so characters can be printed. 440 * Setting up page tables for the kernel 441 * Initialising interrupt controllers to a sane default state 442 */ 443vaddr_t 444initarm(void *arg) 445{ 446 struct bootconfig *passed_bootconfig = arg; 447 extern char _end[]; 448 int loop; 449 int loop1; 450 u_int l1pagetable; 451 paddr_t memstart = 0; 452 psize_t memsize = 0; 453 454 /* Calibrate the delay loop. */ 455 i80321_calibrate_delay(); 456 457 /* Ensure bootconfig has valid magic */ 458 if (passed_bootconfig->magic != BOOTCONFIG_MAGIC) 459 printf("Bad bootconfig magic: %x\n", bootconfig.magic); 460 461 bootconfig = *passed_bootconfig; 462 463 /* Fake bootconfig structure for anything that still needs it */ 464 /* XXX must make the memory description h/w independent */ 465 bootconfig.dram[0].address = memstart; 466 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 467 bootconfig.dramblocks = 1; 468 469 /* process arguments - can update boothowto */ 470 process_kernel_args(); 471 472 /* 473 * Since we map the on-board devices VA==PA, and the kernel 474 * is running VA==PA, it's possible for us to initialize 475 * the console now. 476 */ 477 consinit(); 478 479#ifdef VERBOSE_INIT_ARM 480 /* Talk to the user */ 481 printf("\nNetBSD/iyonix booting ...\n"); 482#endif 483 484 /* 485 * Heads up ... Setup the CPU / MMU / TLB functions 486 */ 487 if (set_cpufuncs()) 488 panic("cpu not recognized!"); 489 490 /* 491 * We are currently running with the MMU enabled and the 492 * entire address space mapped VA==PA. 493 */ 494 495 /* 496 * Fetch the SDRAM start/size from the i80321 SDRAM configuration 497 * registers. 498 */ 499 i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE, 500 &memstart, &memsize); 501 502#ifdef VERBOSE_INIT_ARM 503 printf("initarm: Configuring system ...\n"); 504#endif 505 506 /* 507 * Set up the variables that define the availability of 508 * physical memory. 509 */ 510 physical_start = memstart; 511 physical_end = physical_start + memsize; 512 513 physical_freestart = physical_start + 514 (((uintptr_t) _end - KERNEL_TEXT_BASE + PGOFSET) & ~PGOFSET); 515 physical_freeend = physical_end; 516 517 physmem = (physical_end - physical_start) / PAGE_SIZE; 518 519#ifdef VERBOSE_INIT_ARM 520 /* Tell the user about the memory */ 521 printf("physmemory: 0x%"PRIxPSIZE" pages at 0x%08lx -> 0x%08lx\n", physmem, 522 physical_start, physical_end - 1); 523#endif 524 525 /* 526 * The kernel is loaded at the base of physical memory. We allocate 527 * pages upwards from the top of the kernel. 528 * 529 * We need to allocate some fixed page tables to get the kernel 530 * going. We allocate one page directory and a number of page 531 * tables and store the physical addresses in the kernel_pt_table 532 * array. 533 * 534 * The kernel page directory must be on a 16K boundary. The page 535 * tables must be on 4K boundaries. What we do is allocate the 536 * page directory on the first 16K boundary that we encounter, and 537 * the page tables on 4K boundaries otherwise. Since we allocate 538 * at least 3 L2 page tables, we are guaranteed to encounter at 539 * least one 16K aligned region. 540 */ 541 542#ifdef VERBOSE_INIT_ARM 543 printf("Allocating page tables\n"); 544#endif 545 546 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 547 548#ifdef VERBOSE_INIT_ARM 549 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 550 physical_freestart, free_pages, free_pages); 551#endif 552 553 /* Define a macro to simplify memory allocation */ 554#define valloc_pages(var, np) \ 555 alloc_pages((var).pv_pa, (np)); \ 556 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 557 558#define alloc_pages(var, np) \ 559 (var) = physical_freestart; \ 560 physical_freestart += ((np) * PAGE_SIZE); \ 561 if (physical_freeend < physical_freestart) \ 562 panic("initarm: out of memory"); \ 563 free_pages -= (np); \ 564 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 565 566 loop1 = 0; 567 kernel_l1pt.pv_pa = kernel_l1pt.pv_va = 0; 568 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 569 /* Are we 16KB aligned for an L1 ? */ 570 if ((physical_freestart & (L1_TABLE_SIZE - 1)) == 0 571 && kernel_l1pt.pv_pa == 0) { 572 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 573 } else { 574 valloc_pages(kernel_pt_table[loop1], 575 L2_TABLE_SIZE / PAGE_SIZE); 576 ++loop1; 577 } 578 } 579 580 /* This should never be able to happen but better confirm that. */ 581 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 582 panic("initarm: Failed to align the kernel page directory"); 583 584 /* 585 * Allocate a page for the system page mapped to V0x00000000 586 * This page will just contain the system vectors and can be 587 * shared by all processes. 588 */ 589 alloc_pages(systempage.pv_pa, 1); 590 591 /* Allocate stacks for all modes */ 592 valloc_pages(irqstack, IRQ_STACK_SIZE); 593 valloc_pages(abtstack, ABT_STACK_SIZE); 594 valloc_pages(undstack, UND_STACK_SIZE); 595 valloc_pages(kernelstack, UPAGES); 596 597 /* Allocate enough pages for cleaning the Mini-Data cache. */ 598 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 599 valloc_pages(minidataclean, 1); 600 601#ifdef VERBOSE_INIT_ARM 602 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 603 irqstack.pv_va); 604 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 605 abtstack.pv_va); 606 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 607 undstack.pv_va); 608 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 609 kernelstack.pv_va); 610#endif 611 612 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 613 614 /* 615 * Ok we have allocated physical pages for the primary kernel 616 * page tables 617 */ 618 619#ifdef VERBOSE_INIT_ARM 620 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 621#endif 622 623 /* 624 * Now we start construction of the L1 page table 625 * We start by mapping the L2 page tables into the L1. 626 * This means that we can replace L1 mappings later on if necessary 627 */ 628 l1pagetable = kernel_l1pt.pv_pa; 629 630 /* Map the L2 pages tables in the L1 page table */ 631 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 632 &kernel_pt_table[KERNEL_PT_SYS]); 633 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 634 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 635 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 636 pmap_link_l2pt(l1pagetable, IYONIX_IOPXS_VBASE, 637 &kernel_pt_table[KERNEL_PT_IOPXS]); 638 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 639 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 640 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 641 642 /* update the top of the kernel VM */ 643 pmap_curmaxkvaddr = 644 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 645 646#ifdef VERBOSE_INIT_ARM 647 printf("Mapping kernel\n"); 648#endif 649 650 /* Now we fill in the L2 pagetable for the kernel static code/data */ 651 { 652 extern char etext[], _end[]; 653 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 654 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 655 u_int logical; 656 657 textsize = (textsize + PGOFSET) & ~PGOFSET; 658 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 659 660 logical = 0; /* offset of kernel in RAM */ 661 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 662 physical_start + logical, textsize, 663 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 664 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 665 physical_start + logical, totalsize - textsize, 666 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 667 } 668 669#ifdef VERBOSE_INIT_ARM 670 printf("Constructing L2 page tables\n"); 671#endif 672 673 /* Map the stack pages */ 674 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 675 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 676 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 677 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 678 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 679 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 680 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 681 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 682 683 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 684 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 685 686 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 687 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 688 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 689 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 690 } 691 692 /* Map the Mini-Data cache clean area. */ 693 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 694 minidataclean.pv_pa); 695 696 /* Map the vector page. */ 697 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 698 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 699 700 /* Map the statically mapped devices. */ 701 pmap_devmap_bootstrap(l1pagetable, iyonix_devmap); 702 703 /* 704 * Give the XScale global cache clean code an appropriately 705 * sized chunk of unmapped VA space starting at 0xff000000 706 * (our device mappings end before this address). 707 */ 708 xscale_cache_clean_addr = 0xff000000U; 709 710 /* 711 * Now we have the real page tables in place so we can switch to them. 712 * Once this is done we will be running with the REAL kernel page 713 * tables. 714 */ 715 716 /* Switch tables */ 717#ifdef VERBOSE_INIT_ARM 718 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 719 physical_freestart, free_pages, free_pages); 720 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 721#endif 722 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 723 cpu_setttb(kernel_l1pt.pv_pa, true); 724 cpu_tlb_flushID(); 725 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 726 727 iyonix_read_machineid(); 728 729 /* 730 * Moved from cpu_startup() as data_abort_handler() references 731 * this during uvm init 732 */ 733 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 734 735#ifdef VERBOSE_INIT_ARM 736 printf("done!\n"); 737#endif 738 739#ifdef VERBOSE_INIT_ARM 740 printf("bootstrap done.\n"); 741#endif 742 743 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 744 745 /* 746 * Pages were allocated during the secondary bootstrap for the 747 * stacks for different CPU modes. 748 * We must now set the r13 registers in the different CPU modes to 749 * point to these stacks. 750 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 751 * of the stack memory. 752 */ 753#ifdef VERBOSE_INIT_ARM 754 printf("init subsystems: stacks "); 755#endif 756 757 set_stackptr(PSR_IRQ32_MODE, 758 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 759 set_stackptr(PSR_ABT32_MODE, 760 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 761 set_stackptr(PSR_UND32_MODE, 762 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 763 764 /* 765 * Well we should set a data abort handler. 766 * Once things get going this will change as we will need a proper 767 * handler. 768 * Until then we will use a handler that just panics but tells us 769 * why. 770 * Initialisation of the vectors will just panic on a data abort. 771 * This just fills in a slightly better one. 772 */ 773#ifdef VERBOSE_INIT_ARM 774 printf("vectors "); 775#endif 776 data_abort_handler_address = (u_int)data_abort_handler; 777 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 778 undefined_handler_address = (u_int)undefinedinstruction_bounce; 779 780 /* Initialise the undefined instruction handlers */ 781#ifdef VERBOSE_INIT_ARM 782 printf("undefined "); 783#endif 784 undefined_init(); 785 786 /* Load memory into UVM. */ 787#ifdef VERBOSE_INIT_ARM 788 printf("page "); 789#endif 790 uvm_md_init(); 791 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 792 atop(physical_freestart), atop(physical_freeend), 793 VM_FREELIST_DEFAULT); 794 795 /* Boot strap pmap telling it where managed kernel virtual memory is */ 796#ifdef VERBOSE_INIT_ARM 797 printf("pmap "); 798#endif 799 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 800 801 /* Setup the IRQ system */ 802#ifdef VERBOSE_INIT_ARM 803 printf("irq "); 804#endif 805 i80321_intr_init(); 806 807#ifdef VERBOSE_INIT_ARM 808 printf("done.\n"); 809#endif 810 811#ifdef DDB 812 db_machine_init(); 813 if (boothowto & RB_KDB) 814 Debugger(); 815#endif 816 817 iyonix_pic_init(); 818 819 printf("args: %s\n", bootconfig.args); 820 printf("howto: %x\n", boothowto); 821 822 /* We return the new stack pointer address */ 823 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 824} 825 826void 827consinit(void) 828{ 829 static int consinit_called; 830 831 if (consinit_called != 0) 832 return; 833 834 consinit_called = 1; 835 836 /* We let consinit_<foo> worry about device numbers */ 837 if (strncmp(boot_consdev, "genfb", 5) && 838 strncmp(boot_consdev, "com", 3)) 839 strcpy(boot_consdev, DEFAULT_CONSDEV); 840 841 if (!strncmp(boot_consdev, "com", 3)) 842 consinit_com(boot_consdev); 843 else 844 consinit_genfb(boot_consdev); 845} 846 847static void 848consinit_com(const char *consdev) 849{ 850 static const bus_addr_t comcnaddrs[] = { 851 IYONIX_UART1, /* com0 */ 852 }; 853 /* 854 * Console devices are mapped VA==PA. Our devmap reflects 855 * this, so register it now so drivers can map the console 856 * device. 857 */ 858 pmap_devmap_register(iyonix_devmap); 859 860 /* When we support more than the first serial port as console, 861 * we should check consdev for a number. 862 */ 863#if NCOM > 0 864 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 865 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 866 { 867 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 868 } 869#else 870 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 871#endif 872 873#if KGDB 874#if NCOM > 0 875 if (strcmp(kgdb_devname, "com") == 0) { 876 com_kgdb_attach(&obio_bs_tag, kgdb_devaddr, kgdb_devrate, 877 COM_FREQ, COM_TYPE_NORMAL, kgdb_devmode); 878 } 879#endif /* NCOM > 0 */ 880#endif /* KGDB */ 881} 882 883static void 884consinit_genfb(const char *consdev) 885{ 886 /* NOTYET */ 887} 888 889static void 890process_kernel_args(void) 891{ 892 char *args; 893 894 /* Ok now we will check the arguments for interesting parameters. */ 895 args = bootconfig.args; 896 897#ifdef BOOTHOWTO 898 boothowto = BOOTHOWTO; 899#else 900 boothowto = 0; 901#endif 902 903 /* Only arguments itself are passed from the bootloader */ 904 while (*args == ' ') 905 ++args; 906 907 boot_args = args; 908 parse_mi_bootargs(boot_args); 909 parse_iyonix_bootargs(boot_args); 910} 911 912static void 913parse_iyonix_bootargs(char *args) 914{ 915 char *ptr; 916 917 if (get_bootconf_option(args, "consdev", BOOTOPT_TYPE_STRING, &ptr)) 918 { 919 /* ptr may have trailing clutter */ 920 strlcpy(boot_consdev, ptr, sizeof(boot_consdev)); 921 if ( (ptr = strchr(boot_consdev, ' ')) ) 922 *ptr = 0; 923 } 924} 925