sys/arch/evbarm/iq80321/iq80321_machdep.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc.
   5  * All rights reserved.
   6  *
   7  * Written by Jason R. Thorpe and Steve C. Woodford 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 dependant functions for kernel setup for Intel IQ80321 evaluation
  72  * boards using RedBoot firmware.
  73  */
  74
  75 #include <sys/cdefs.h>
  76 __KERNEL_RCSID(0, "$NetBSD$");
  77
  78 #include "opt_ddb.h"
  79 #include "opt_kgdb.h"
  80 #include "opt_pmap_debug.h"
  81
  82 #include <sys/param.h>
  83 #include <sys/device.h>
  84 #include <sys/systm.h>
  85 #include <sys/kernel.h>
  86 #include <sys/exec.h>
  87 #include <sys/proc.h>
  88 #include <sys/msgbuf.h>
  89 #include <sys/reboot.h>
  90 #include <sys/termios.h>
  91 #include <sys/ksyms.h>
  92
  93 #include <uvm/uvm_extern.h>
  94
  95 #include <dev/cons.h>
  96
  97 #include <machine/db_machdep.h>
  98 #include <ddb/db_sym.h>
  99 #include <ddb/db_extern.h>
 100
 101 #include <machine/bootconfig.h>
 102 #include <machine/bus.h>
 103 #include <machine/cpu.h>
 104 #include <machine/frame.h>
 105 #include <arm/undefined.h>
 106
 107 #include <arm/arm32/machdep.h>
 108
 109 #include <arm/xscale/i80321reg.h>
 110 #include <arm/xscale/i80321var.h>
 111
 112 #include <dev/pci/ppbreg.h>
 113
 114 #include <evbarm/iq80321/iq80321reg.h>
 115 #include <evbarm/iq80321/iq80321var.h>
 116 #include <evbarm/iq80321/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 /*
 131  * Address to call from cpu_reset() to reset the machine.
 132  * This is machine architecture dependant as it varies depending
 133  * on where the ROM appears when you turn the MMU off.
 134  *
 135  * XXX Not actally used on IQ80321 -- clean up the generic
 136  * ARM code.
 137  */
 138
 139 u_int cpu_reset_address = 0x00000000;
 140
 141 /* Define various stack sizes in pages */
 142 #define IRQ_STACK_SIZE  1
 143 #define ABT_STACK_SIZE  1
 144 #define UND_STACK_SIZE  1
 145
 146 BootConfig bootconfig;          /* Boot config storage */
 147 char *boot_args = NULL;
 148 char *boot_file = NULL;
 149
 150 vm_offset_t physical_start;
 151 vm_offset_t physical_freestart;
 152 vm_offset_t physical_freeend;
 153 vm_offset_t physical_end;
 154 u_int free_pages;
 155
 156 /*int debug_flags;*/
 157 #ifndef PMAP_STATIC_L1S
 158 int max_processes = 64;                 /* Default number */
 159 #endif  /* !PMAP_STATIC_L1S */
 160
 161 /* Physical and virtual addresses for some global pages */
 162 pv_addr_t irqstack;
 163 pv_addr_t undstack;
 164 pv_addr_t abtstack;
 165 pv_addr_t kernelstack;
 166 pv_addr_t minidataclean;
 167
 168 vm_offset_t msgbufphys;
 169
 170 extern u_int data_abort_handler_address;
 171 extern u_int prefetch_abort_handler_address;
 172 extern u_int undefined_handler_address;
 173
 174 #ifdef PMAP_DEBUG
 175 extern int pmap_debug_level;
 176 #endif
 177
 178 #define KERNEL_PT_SYS           0       /* L2 table for mapping zero page */
 179
 180 #define KERNEL_PT_KERNEL        1       /* L2 table for mapping kernel */
 181 #define KERNEL_PT_KERNEL_NUM    4
 182
 183                                         /* L2 table for mapping i80321 */
 184 #define KERNEL_PT_IOPXS         (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM)
 185
 186                                         /* L2 tables for mapping kernel VM */
 187 #define KERNEL_PT_VMDATA        (KERNEL_PT_IOPXS + 1)
 188 #define KERNEL_PT_VMDATA_NUM    4       /* start with 16MB of KVM */
 189 #define NUM_KERNEL_PTS          (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM)
 190
 191 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS];
 192
 193 /* Prototypes */
 194
 195 void    consinit(void);
 196
 197 #include "com.h"
 198 #if NCOM > 0
 199 #include <dev/ic/comreg.h>
 200 #include <dev/ic/comvar.h>
 201 #endif
 202
 203 /*
 204  * Define the default console speed for the board.  This is generally
 205  * what the firmware provided with the board defaults to.
 206  */
 207 #ifndef CONSPEED
 208 #define CONSPEED B115200
 209 #endif /* ! CONSPEED */
 210
 211 #ifndef CONUNIT
 212 #define CONUNIT 0
 213 #endif
 214
 215 #ifndef CONMODE
 216 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
 217 #endif
 218
 219 int comcnspeed = CONSPEED;
 220 int comcnmode = CONMODE;
 221 int comcnunit = CONUNIT;
 222
 223 #if KGDB
 224 #ifndef KGDB_DEVNAME
 225 #error Must define KGDB_DEVNAME
 226 #endif
 227 const char kgdb_devname[] = KGDB_DEVNAME;
 228
 229 #ifndef KGDB_DEVADDR
 230 #error Must define KGDB_DEVADDR
 231 #endif
 232 unsigned long kgdb_devaddr = KGDB_DEVADDR;
 233
 234 #ifndef KGDB_DEVRATE
 235 #define KGDB_DEVRATE    CONSPEED
 236 #endif
 237 int kgdb_devrate = KGDB_DEVRATE;
 238
 239 #ifndef KGDB_DEVMODE
 240 #define KGDB_DEVMODE    CONMODE
 241 #endif
 242 int kgdb_devmode = KGDB_DEVMODE;
 243 #endif /* KGDB */
 244
 245 #if defined(I80321_REBOOT)
 246 extern void I80321_REBOOT(int);
 247 #endif
 248
 249 /*
 250  * void cpu_reboot(int howto, char *bootstr)
 251  *
 252  * Reboots the system
 253  *
 254  * Deal with any syncing, unmounting, dumping and shutdown hooks,
 255  * then reset the CPU.
 256  */
 257 void
 258 cpu_reboot(int howto, char *bootstr)
 259 {
 260
 261         /*
 262          * If we are still cold then hit the air brakes
 263          * and crash to earth fast
 264          */
 265         if (cold) {
 266                 doshutdownhooks();
 267                 pmf_system_shutdown(boothowto);
 268                 printf("The operating system has halted.\n");
 269                 printf("Please press any key to reboot.\n\n");
 270                 cngetc();
 271                 printf("rebooting...\n");
 272                 goto reset;
 273         }
 274
 275         /* Disable console buffering */
 276
 277         /*
 278          * If RB_NOSYNC was not specified sync the discs.
 279          * Note: Unless cold is set to 1 here, syslogd will die during the
 280          * unmount.  It looks like syslogd is getting woken up only to find
 281          * that it cannot page part of the binary in as the filesystem has
 282          * been unmounted.
 283          */
 284         if (!(howto & RB_NOSYNC))
 285                 bootsync();
 286
 287         /* Say NO to interrupts */
 288         splhigh();
 289
 290         /* Do a dump if requested. */
 291         if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP)
 292                 dumpsys();
 293
 294         /* Run any shutdown hooks */
 295         doshutdownhooks();
 296
 297         pmf_system_shutdown(boothowto);
 298
 299         /* Make sure IRQ's are disabled */
 300         IRQdisable;
 301
 302         if (howto & RB_HALT) {
 303 #if defined(I80321_REBOOT)
 304                 I80321_REBOOT(howto);
 305 #endif
 306                 iq80321_7seg('.', '.');
 307                 printf("The operating system has halted.\n");
 308                 printf("Please press any key to reboot.\n\n");
 309                 cngetc();
 310         }
 311
 312         printf("rebooting...\n\r");
 313  reset:
 314 #if defined(I80321_REBOOT)
 315         I80321_REBOOT(howto);
 316 #endif
 317
 318         /*
 319          * Make really really sure that all interrupts are disabled,
 320          * and poke the Internal Bus and Peripheral Bus reset lines.
 321          */
 322         (void) disable_interrupts(I32_bit|F32_bit);
 323         *(volatile uint32_t *)(IQ80321_80321_VBASE + VERDE_ATU_BASE +
 324             ATU_PCSR) = PCSR_RIB | PCSR_RPB;
 325
 326         /* ...and if that didn't work, just croak. */
 327         printf("RESET FAILED!\n");
 328         for (;;);
 329 }
 330
 331 /* Static device mappings. */
 332 static const struct pmap_devmap iq80321_devmap[] = {
 333     /*
 334      * Map the on-board devices VA == PA so that we can access them
 335      * with the MMU on or off.
 336      */
 337     {
 338         IQ80321_OBIO_BASE,
 339         IQ80321_OBIO_BASE,
 340         IQ80321_OBIO_SIZE,
 341         VM_PROT_READ|VM_PROT_WRITE,
 342         PTE_NOCACHE,
 343     },
 344
 345     {
 346         IQ80321_IOW_VBASE,
 347         VERDE_OUT_XLATE_IO_WIN0_BASE,
 348         VERDE_OUT_XLATE_IO_WIN_SIZE,
 349         VM_PROT_READ|VM_PROT_WRITE,
 350         PTE_NOCACHE,
 351    },
 352
 353    {
 354         IQ80321_80321_VBASE,
 355         VERDE_PMMR_BASE,
 356         VERDE_PMMR_SIZE,
 357         VM_PROT_READ|VM_PROT_WRITE,
 358         PTE_NOCACHE,
 359    },
 360
 361    {
 362         0,
 363         0,
 364         0,
 365         0,
 366         0,
 367     }
 368 };
 369
 370 static void
 371 iq80321_hardclock_hook(void)
 372 {
 373         static int snakefreq;
 374
 375         if ((snakefreq++ & 15) == 0)
 376                 iq80321_7seg_snake();
 377 }
 378
 379 /*
 380  * u_int initarm(...)
 381  *
 382  * Initial entry point on startup. This gets called before main() is
 383  * entered.
 384  * It should be responsible for setting up everything that must be
 385  * in place when main is called.
 386  * This includes
 387  *   Taking a copy of the boot configuration structure.
 388  *   Initialising the physical console so characters can be printed.
 389  *   Setting up page tables for the kernel
 390  *   Relocating the kernel to the bottom of physical memory
 391  */
 392 u_int
 393 initarm(void *arg)
 394 {
 395         extern vaddr_t xscale_cache_clean_addr;
 396 #ifdef DIAGNOSTIC
 397         extern vsize_t xscale_minidata_clean_size;
 398 #endif
 399         int loop;
 400         int loop1;
 401         u_int l1pagetable;
 402         paddr_t memstart;
 403         psize_t memsize;
 404
 405         /*
 406          * Clear out the 7-segment display.  Whee, the first visual
 407          * indication that we're running kernel code.
 408          */
 409         iq80321_7seg(' ', ' ');
 410
 411         /* Calibrate the delay loop. */
 412         i80321_calibrate_delay();
 413         i80321_hardclock_hook = iq80321_hardclock_hook;
 414
 415         /*
 416          * Since we map the on-board devices VA==PA, and the kernel
 417          * is running VA==PA, it's possible for us to initialize
 418          * the console now.
 419          */
 420         consinit();
 421
 422 #ifdef VERBOSE_INIT_ARM
 423         /* Talk to the user */
 424         printf("\nNetBSD/evbarm (IQ80321) booting ...\n");
 425 #endif
 426
 427         /*
 428          * Heads up ... Setup the CPU / MMU / TLB functions
 429          */
 430         if (set_cpufuncs())
 431                 panic("CPU not recognized!");
 432
 433         /*
 434          * We are currently running with the MMU enabled and the
 435          * entire address space mapped VA==PA, except for the
 436          * first 64M of RAM is also double-mapped at 0xc0000000.
 437          * There is an L1 page table at 0xa0004000.
 438          */
 439
 440         /*
 441          * Fetch the SDRAM start/size from the i80321 SDRAM configuration
 442          * registers.
 443          */
 444         i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE,
 445             &memstart, &memsize);
 446
 447 #ifdef VERBOSE_INIT_ARM
 448         printf("initarm: Configuring system ...\n");
 449 #endif
 450
 451         /* Fake bootconfig structure for the benefit of pmap.c */
 452         /* XXX must make the memory description h/w independent */
 453         bootconfig.dramblocks = 1;
 454         bootconfig.dram[0].address = memstart;
 455         bootconfig.dram[0].pages = memsize / PAGE_SIZE;
 456
 457         /*
 458          * Set up the variables that define the availablilty of
 459          * physical memory.  For now, we're going to set
 460          * physical_freestart to 0xa0200000 (where the kernel
 461          * was loaded), and allocate the memory we need downwards.
 462          * If we get too close to the L1 table that we set up, we
 463          * will panic.  We will update physical_freestart and
 464          * physical_freeend later to reflect what pmap_bootstrap()
 465          * wants to see.
 466          *
 467          * XXX pmap_bootstrap() needs an enema.
 468          */
 469         physical_start = bootconfig.dram[0].address;
 470         physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE);
 471
 472         physical_freestart = 0xa0009000UL;
 473         physical_freeend = 0xa0200000UL;
 474
 475         physmem = (physical_end - physical_start) / PAGE_SIZE;
 476
 477 #ifdef VERBOSE_INIT_ARM
 478         /* Tell the user about the memory */
 479         printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem,
 480             physical_start, physical_end - 1);
 481 #endif
 482
 483         /*
 484          * Okay, the kernel starts 2MB in from the bottom of physical
 485          * memory.  We are going to allocate our bootstrap pages downwards
 486          * from there.
 487          *
 488          * We need to allocate some fixed page tables to get the kernel
 489          * going.  We allocate one page directory and a number of page
 490          * tables and store the physical addresses in the kernel_pt_table
 491          * array.
 492          *
 493          * The kernel page directory must be on a 16K boundary.  The page
 494          * tables must be on 4K boundaries.  What we do is allocate the
 495          * page directory on the first 16K boundary that we encounter, and
 496          * the page tables on 4K boundaries otherwise.  Since we allocate
 497          * at least 3 L2 page tables, we are guaranteed to encounter at
 498          * least one 16K aligned region.
 499          */
 500
 501 #ifdef VERBOSE_INIT_ARM
 502         printf("Allocating page tables\n");
 503 #endif
 504
 505         free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;
 506
 507 #ifdef VERBOSE_INIT_ARM
 508         printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n",
 509                physical_freestart, free_pages, free_pages);
 510 #endif
 511
 512         /* Define a macro to simplify memory allocation */
 513 #define valloc_pages(var, np)                           \
 514         alloc_pages((var).pv_pa, (np));                 \
 515         (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;
 516
 517 #define alloc_pages(var, np)                            \
 518         physical_freeend -= ((np) * PAGE_SIZE);         \
 519         if (physical_freeend < physical_freestart)      \
 520                 panic("initarm: out of memory");        \
 521         (var) = physical_freeend;                       \
 522         free_pages -= (np);                             \
 523         memset((char *)(var), 0, ((np) * PAGE_SIZE));
 524
 525         loop1 = 0;
 526         kernel_l1pt.pv_pa = 0;
 527         kernel_l1pt.pv_va = 0;
 528         for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
 529                 /* Are we 16KB aligned for an L1 ? */
 530                 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0
 531                     && kernel_l1pt.pv_pa == 0) {
 532                         valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
 533                 } else {
 534                         valloc_pages(kernel_pt_table[loop1],
 535                             L2_TABLE_SIZE / PAGE_SIZE);
 536                         ++loop1;
 537                 }
 538         }
 539
 540         /* This should never be able to happen but better confirm that. */
 541         if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0)
 542                 panic("initarm: Failed to align the kernel page directory");
 543
 544         /*
 545          * Allocate a page for the system page mapped to V0x00000000
 546          * This page will just contain the system vectors and can be
 547          * shared by all processes.
 548          */
 549         alloc_pages(systempage.pv_pa, 1);
 550
 551         /* Allocate stacks for all modes */
 552         valloc_pages(irqstack, IRQ_STACK_SIZE);
 553         valloc_pages(abtstack, ABT_STACK_SIZE);
 554         valloc_pages(undstack, UND_STACK_SIZE);
 555         valloc_pages(kernelstack, UPAGES);
 556
 557         /* Allocate enough pages for cleaning the Mini-Data cache. */
 558         KASSERT(xscale_minidata_clean_size <= PAGE_SIZE);
 559         valloc_pages(minidataclean, 1);
 560
 561 #ifdef VERBOSE_INIT_ARM
 562         printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa,
 563             irqstack.pv_va);
 564         printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa,
 565             abtstack.pv_va);
 566         printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa,
 567             undstack.pv_va);
 568         printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa,
 569             kernelstack.pv_va);
 570 #endif
 571
 572         /*
 573          * XXX Defer this to later so that we can reclaim the memory
 574          * XXX used by the RedBoot page tables.
 575          */
 576         alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);
 577
 578         /*
 579          * Ok we have allocated physical pages for the primary kernel
 580          * page tables
 581          */
 582
 583 #ifdef VERBOSE_INIT_ARM
 584         printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa);
 585 #endif
 586
 587         /*
 588          * Now we start construction of the L1 page table
 589          * We start by mapping the L2 page tables into the L1.
 590          * This means that we can replace L1 mappings later on if necessary
 591          */
 592         l1pagetable = kernel_l1pt.pv_pa;
 593
 594         /* Map the L2 pages tables in the L1 page table */
 595         pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1),
 596             &kernel_pt_table[KERNEL_PT_SYS]);
 597         for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++)
 598                 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000,
 599                     &kernel_pt_table[KERNEL_PT_KERNEL + loop]);
 600         pmap_link_l2pt(l1pagetable, IQ80321_IOPXS_VBASE,
 601             &kernel_pt_table[KERNEL_PT_IOPXS]);
 602         for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++)
 603                 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
 604                     &kernel_pt_table[KERNEL_PT_VMDATA + loop]);
 605
 606         /* update the top of the kernel VM */
 607         pmap_curmaxkvaddr =
 608             KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);
 609
 610 #ifdef VERBOSE_INIT_ARM
 611         printf("Mapping kernel\n");
 612 #endif
 613
 614         /* Now we fill in the L2 pagetable for the kernel static code/data */
 615         {
 616                 extern char etext[], _end[];
 617                 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE;
 618                 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE;
 619                 u_int logical;
 620
 621                 textsize = (textsize + PGOFSET) & ~PGOFSET;
 622                 totalsize = (totalsize + PGOFSET) & ~PGOFSET;
 623
 624                 logical = 0x00200000;   /* offset of kernel in RAM */
 625
 626                 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
 627                     physical_start + logical, textsize,
 628                     VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 629                 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
 630                     physical_start + logical, totalsize - textsize,
 631                     VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 632         }
 633
 634 #ifdef VERBOSE_INIT_ARM
 635         printf("Constructing L2 page tables\n");
 636 #endif
 637
 638         /* Map the stack pages */
 639         pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
 640             IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 641         pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
 642             ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 643         pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
 644             UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 645         pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
 646             UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 647
 648         pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
 649             L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
 650
 651         for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
 652                 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
 653                     kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
 654                     VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
 655         }
 656
 657         /* Map the Mini-Data cache clean area. */
 658         xscale_setup_minidata(l1pagetable, minidataclean.pv_va,
 659             minidataclean.pv_pa);
 660
 661         /* Map the vector page. */
 662         pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
 663             VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 664
 665         /* Map the statically mapped devices. */
 666         pmap_devmap_bootstrap(l1pagetable, iq80321_devmap);
 667
 668         /*
 669          * Give the XScale global cache clean code an appropriately
 670          * sized chunk of unmapped VA space starting at 0xff000000
 671          * (our device mappings end before this address).
 672          */
 673         xscale_cache_clean_addr = 0xff000000U;
 674
 675         /*
 676          * Now we have the real page tables in place so we can switch to them.
 677          * Once this is done we will be running with the REAL kernel page
 678          * tables.
 679          */
 680
 681         /*
 682          * Update the physical_freestart/physical_freeend/free_pages
 683          * variables.
 684          */
 685         {
 686                 extern char _end[];
 687
 688                 physical_freestart = physical_start +
 689                     (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) -
 690                      KERNEL_BASE);
 691                 physical_freeend = physical_end;
 692                 free_pages =
 693                     (physical_freeend - physical_freestart) / PAGE_SIZE;
 694         }
 695
 696         /* Switch tables */
 697 #ifdef VERBOSE_INIT_ARM
 698         printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
 699                physical_freestart, free_pages, free_pages);
 700         printf("switching to new L1 page table  @%#lx...", kernel_l1pt.pv_pa);
 701 #endif
 702         cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
 703         cpu_setttb(kernel_l1pt.pv_pa);
 704         cpu_tlb_flushID();
 705         cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
 706
 707         /*
 708          * Moved from cpu_startup() as data_abort_handler() references
 709          * this during uvm init
 710          */
 711         uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);
 712
 713 #ifdef VERBOSE_INIT_ARM
 714         printf("done!\n");
 715 #endif
 716
 717 #ifdef VERBOSE_INIT_ARM
 718         printf("bootstrap done.\n");
 719 #endif
 720
 721         arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
 722
 723         /*
 724          * Pages were allocated during the secondary bootstrap for the
 725          * stacks for different CPU modes.
 726          * We must now set the r13 registers in the different CPU modes to
 727          * point to these stacks.
 728          * Since the ARM stacks use STMFD etc. we must set r13 to the top end
 729          * of the stack memory.
 730          */
 731 #ifdef VERBOSE_INIT_ARM
 732         printf("init subsystems: stacks ");
 733 #endif
 734
 735         set_stackptr(PSR_IRQ32_MODE,
 736             irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
 737         set_stackptr(PSR_ABT32_MODE,
 738             abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
 739         set_stackptr(PSR_UND32_MODE,
 740             undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
 741
 742         /*
 743          * Well we should set a data abort handler.
 744          * Once things get going this will change as we will need a proper
 745          * handler.
 746          * Until then we will use a handler that just panics but tells us
 747          * why.
 748          * Initialisation of the vectors will just panic on a data abort.
 749          * This just fills in a slightly better one.
 750          */
 751 #ifdef VERBOSE_INIT_ARM
 752         printf("vectors ");
 753 #endif
 754         data_abort_handler_address = (u_int)data_abort_handler;
 755         prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
 756         undefined_handler_address = (u_int)undefinedinstruction_bounce;
 757
 758         /* Initialise the undefined instruction handlers */
 759 #ifdef VERBOSE_INIT_ARM
 760         printf("undefined ");
 761 #endif
 762         undefined_init();
 763
 764         /* Load memory into UVM. */
 765 #ifdef VERBOSE_INIT_ARM
 766         printf("page ");
 767 #endif
 768         uvm_setpagesize();      /* initialize PAGE_SIZE-dependent variables */
 769         uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
 770             atop(physical_freestart), atop(physical_freeend),
 771             VM_FREELIST_DEFAULT);
 772
 773         /* Boot strap pmap telling it where the kernel page table is */
 774 #ifdef VERBOSE_INIT_ARM
 775         printf("pmap ");
 776 #endif
 777         pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);
 778
 779         /* Setup the IRQ system */
 780 #ifdef VERBOSE_INIT_ARM
 781         printf("irq ");
 782 #endif
 783         i80321_intr_init();
 784
 785 #ifdef VERBOSE_INIT_ARM
 786         printf("done.\n");
 787 #endif
 788
 789 #ifdef BOOTHOWTO
 790         boothowto = BOOTHOWTO;
 791 #endif
 792
 793 #ifdef DDB
 794         db_machine_init();
 795         if (boothowto & RB_KDB)
 796                 Debugger();
 797 #endif
 798
 799         /* We return the new stack pointer address */
 800         return(kernelstack.pv_va + USPACE_SVC_STACK_TOP);
 801 }
 802
 803 void
 804 consinit(void)
 805 {
 806         static const bus_addr_t comcnaddrs[] = {
 807                 IQ80321_UART1,          /* com0 */
 808         };
 809         static int consinit_called;
 810
 811         if (consinit_called != 0)
 812                 return;
 813
 814         consinit_called = 1;
 815
 816         /*
 817          * Console devices are mapped VA==PA.  Our devmap reflects
 818          * this, so register it now so drivers can map the console
 819          * device.
 820          */
 821         pmap_devmap_register(iq80321_devmap);
 822
 823 #if NCOM > 0
 824         if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed,
 825             COM_FREQ, COM_TYPE_NORMAL, comcnmode))
 826                 panic("can't init serial console @%lx", comcnaddrs[comcnunit]);
 827 #else
 828         panic("serial console @%lx not configured", comcnaddrs[comcnunit]);
 829 #endif
 830 #if KGDB
 831 #if NCOM > 0
 832         if (strcmp(kgdb_devname, "com") == 0) {
 833                 com_kgdb_attach(&obio_bs_tag, kgdb_devaddr, kgdb_devrate,
 834                                 COM_FREQ, COM_TYPE_NORMAL, kgdb_devmode);
 835         }
 836 #endif  /* NCOM > 0 */
 837 #endif  /* KGDB */
 838 }