sys/arch/evbarm/npwr_fc/npwr_fc_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 /*
 246  * void cpu_reboot(int howto, char *bootstr)
 247  *
 248  * Reboots the system
 249  *
 250  * Deal with any syncing, unmounting, dumping and shutdown hooks,
 251  * then reset the CPU.
 252  */
 253 void
 254 cpu_reboot(int howto, char *bootstr)
 255 {
 256
 257         /*
 258          * If we are still cold then hit the air brakes
 259          * and crash to earth fast
 260          */
 261         if (cold) {
 262                 doshutdownhooks();
 263                 pmf_system_shutdown(boothowto);
 264                 printf("The operating system has halted.\n");
 265                 printf("Please press any key to reboot.\n\n");
 266                 cngetc();
 267                 printf("rebooting...\n");
 268                 goto reset;
 269         }
 270
 271         /* Disable console buffering */
 272
 273         /*
 274          * If RB_NOSYNC was not specified sync the discs.
 275          * Note: Unless cold is set to 1 here, syslogd will die during the
 276          * unmount.  It looks like syslogd is getting woken up only to find
 277          * that it cannot page part of the binary in as the filesystem has
 278          * been unmounted.
 279          */
 280         if (!(howto & RB_NOSYNC))
 281                 bootsync();
 282
 283         /* Say NO to interrupts */
 284         splhigh();
 285
 286         /* Do a dump if requested. */
 287         if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP)
 288                 dumpsys();
 289
 290         /* Run any shutdown hooks */
 291         doshutdownhooks();
 292
 293         pmf_system_shutdown(boothowto);
 294
 295         /* Make sure IRQ's are disabled */
 296         IRQdisable;
 297
 298         if (howto & RB_HALT) {
 299                 printf("The operating system has halted.\n");
 300                 printf("Please press any key to reboot.\n\n");
 301                 cngetc();
 302         }
 303
 304         printf("rebooting...\n\r");
 305  reset:
 306         /*
 307          * Make really really sure that all interrupts are disabled,
 308          * and poke the Internal Bus and Peripheral Bus reset lines.
 309          */
 310         (void) disable_interrupts(I32_bit|F32_bit);
 311         *(volatile uint32_t *)(IQ80321_80321_VBASE + VERDE_ATU_BASE +
 312             ATU_PCSR) = PCSR_RIB | PCSR_RPB;
 313
 314         /* ...and if that didn't work, just croak. */
 315         printf("RESET FAILED!\n");
 316         for (;;);
 317 }
 318
 319 /* Static device mappings. */
 320 static const struct pmap_devmap iq80321_devmap[] = {
 321     /*
 322      * Map the on-board devices VA == PA so that we can access them
 323      * with the MMU on or off.
 324      */
 325     {
 326         IQ80321_OBIO_BASE,
 327         IQ80321_OBIO_BASE,
 328         IQ80321_OBIO_SIZE,
 329         VM_PROT_READ|VM_PROT_WRITE,
 330         PTE_NOCACHE,
 331     },
 332
 333     {
 334         IQ80321_IOW_VBASE,
 335         VERDE_OUT_XLATE_IO_WIN0_BASE,
 336         VERDE_OUT_XLATE_IO_WIN_SIZE,
 337         VM_PROT_READ|VM_PROT_WRITE,
 338         PTE_NOCACHE,
 339    },
 340
 341    {
 342         IQ80321_80321_VBASE,
 343         VERDE_PMMR_BASE,
 344         VERDE_PMMR_SIZE,
 345         VM_PROT_READ|VM_PROT_WRITE,
 346         PTE_NOCACHE,
 347    },
 348
 349    {
 350         0,
 351         0,
 352         0,
 353         0,
 354         0,
 355     }
 356 };
 357
 358 /*
 359  * u_int initarm(...)
 360  *
 361  * Initial entry point on startup. This gets called before main() is
 362  * entered.
 363  * It should be responsible for setting up everything that must be
 364  * in place when main is called.
 365  * This includes
 366  *   Taking a copy of the boot configuration structure.
 367  *   Initialising the physical console so characters can be printed.
 368  *   Setting up page tables for the kernel
 369  *   Relocating the kernel to the bottom of physical memory
 370  */
 371 u_int
 372 initarm(void *arg)
 373 {
 374         extern vaddr_t xscale_cache_clean_addr;
 375 #ifdef DIAGNOSTIC
 376         extern vsize_t xscale_minidata_clean_size;
 377 #endif
 378         int loop;
 379         int loop1;
 380         u_int l1pagetable;
 381         paddr_t memstart;
 382         psize_t memsize;
 383
 384         /* Calibrate the delay loop. */
 385         i80321_calibrate_delay();
 386         i80321_hardclock_hook = NULL;
 387
 388         /*
 389          * Since we map the on-board devices VA==PA, and the kernel
 390          * is running VA==PA, it's possible for us to initialize
 391          * the console now.
 392          */
 393         consinit();
 394
 395 #ifdef VERBOSE_INIT_ARM
 396         /* Talk to the user */
 397         printf("\nNetBSD/evbarm (NPWR_FC) booting ...\n");
 398 #endif
 399
 400         /*
 401          * Heads up ... Setup the CPU / MMU / TLB functions
 402          */
 403         if (set_cpufuncs())
 404                 panic("cpu not recognized!");
 405
 406         /*
 407          * We are currently running with the MMU enabled and the
 408          * entire address space mapped VA==PA, except for the
 409          * first 64M of RAM is also double-mapped at 0xc0000000.
 410          * There is an L1 page table at 0xa0004000.
 411          */
 412
 413         /*
 414          * Fetch the SDRAM start/size from the i80321 SDRAM configration
 415          * registers.
 416          */
 417         i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE,
 418             &memstart, &memsize);
 419
 420 #ifdef VERBOSE_INIT_ARM
 421         printf("initarm: Configuring system ...\n");
 422 #endif
 423
 424         /* Fake bootconfig structure for the benefit of pmap.c */
 425         /* XXX must make the memory description h/w independent */
 426         bootconfig.dramblocks = 1;
 427         bootconfig.dram[0].address = memstart;
 428         bootconfig.dram[0].pages = memsize / PAGE_SIZE;
 429
 430         /*
 431          * Set up the variables that define the availablilty of
 432          * physical memory.  For now, we're going to set
 433          * physical_freestart to 0xa0200000 (where the kernel
 434          * was loaded), and allocate the memory we need downwards.
 435          * If we get too close to the L1 table that we set up, we
 436          * will panic.  We will update physical_freestart and
 437          * physical_freeend later to reflect what pmap_bootstrap()
 438          * wants to see.
 439          *
 440          * XXX pmap_bootstrap() needs an enema.
 441          */
 442         physical_start = bootconfig.dram[0].address;
 443         physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE);
 444
 445         physical_freestart = 0xa0009000UL;
 446         physical_freeend = 0xa0200000UL;
 447
 448         physmem = (physical_end - physical_start) / PAGE_SIZE;
 449
 450 #ifdef VERBOSE_INIT_ARM
 451         /* Tell the user about the memory */
 452         printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem,
 453             physical_start, physical_end - 1);
 454 #endif
 455
 456         /*
 457          * Okay, the kernel starts 2MB in from the bottom of physical
 458          * memory.  We are going to allocate our bootstrap pages downwards
 459          * from there.
 460          *
 461          * We need to allocate some fixed page tables to get the kernel
 462          * going.  We allocate one page directory and a number of page
 463          * tables and store the physical addresses in the kernel_pt_table
 464          * array.
 465          *
 466          * The kernel page directory must be on a 16K boundary.  The page
 467          * tables must be on 4K bounaries.  What we do is allocate the
 468          * page directory on the first 16K boundary that we encounter, and
 469          * the page tables on 4K boundaries otherwise.  Since we allocate
 470          * at least 3 L2 page tables, we are guaranteed to encounter at
 471          * least one 16K aligned region.
 472          */
 473
 474 #ifdef VERBOSE_INIT_ARM
 475         printf("Allocating page tables\n");
 476 #endif
 477
 478         free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;
 479
 480 #ifdef VERBOSE_INIT_ARM
 481         printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n",
 482                physical_freestart, free_pages, free_pages);
 483 #endif
 484
 485         /* Define a macro to simplify memory allocation */
 486 #define valloc_pages(var, np)                           \
 487         alloc_pages((var).pv_pa, (np));                 \
 488         (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;
 489
 490 #define alloc_pages(var, np)                            \
 491         physical_freeend -= ((np) * PAGE_SIZE);         \
 492         if (physical_freeend < physical_freestart)      \
 493                 panic("initarm: out of memory");        \
 494         (var) = physical_freeend;                       \
 495         free_pages -= (np);                             \
 496         memset((char *)(var), 0, ((np) * PAGE_SIZE));
 497
 498         loop1 = 0;
 499         for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
 500                 /* Are we 16KB aligned for an L1 ? */
 501                 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0
 502                     && kernel_l1pt.pv_pa == 0) {
 503                         valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
 504                 } else {
 505                         valloc_pages(kernel_pt_table[loop1],
 506                             L2_TABLE_SIZE / PAGE_SIZE);
 507                         ++loop1;
 508                 }
 509         }
 510
 511         /* This should never be able to happen but better confirm that. */
 512         if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0)
 513                 panic("initarm: Failed to align the kernel page directory");
 514
 515         /*
 516          * Allocate a page for the system page mapped to V0x00000000
 517          * This page will just contain the system vectors and can be
 518          * shared by all processes.
 519          */
 520         alloc_pages(systempage.pv_pa, 1);
 521
 522         /* Allocate stacks for all modes */
 523         valloc_pages(irqstack, IRQ_STACK_SIZE);
 524         valloc_pages(abtstack, ABT_STACK_SIZE);
 525         valloc_pages(undstack, UND_STACK_SIZE);
 526         valloc_pages(kernelstack, UPAGES);
 527
 528         /* Allocate enough pages for cleaning the Mini-Data cache. */
 529         KASSERT(xscale_minidata_clean_size <= PAGE_SIZE);
 530         valloc_pages(minidataclean, 1);
 531
 532 #ifdef VERBOSE_INIT_ARM
 533         printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa,
 534             irqstack.pv_va);
 535         printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa,
 536             abtstack.pv_va);
 537         printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa,
 538             undstack.pv_va);
 539         printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa,
 540             kernelstack.pv_va);
 541 #endif
 542
 543         /*
 544          * XXX Defer this to later so that we can reclaim the memory
 545          * XXX used by the RedBoot page tables.
 546          */
 547         alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);
 548
 549         /*
 550          * Ok we have allocated physical pages for the primary kernel
 551          * page tables
 552          */
 553
 554 #ifdef VERBOSE_INIT_ARM
 555         printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa);
 556 #endif
 557
 558         /*
 559          * Now we start construction of the L1 page table
 560          * We start by mapping the L2 page tables into the L1.
 561          * This means that we can replace L1 mappings later on if necessary
 562          */
 563         l1pagetable = kernel_l1pt.pv_pa;
 564
 565         /* Map the L2 pages tables in the L1 page table */
 566         pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1),
 567             &kernel_pt_table[KERNEL_PT_SYS]);
 568         for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++)
 569                 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000,
 570                     &kernel_pt_table[KERNEL_PT_KERNEL + loop]);
 571         pmap_link_l2pt(l1pagetable, IQ80321_IOPXS_VBASE,
 572             &kernel_pt_table[KERNEL_PT_IOPXS]);
 573         for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++)
 574                 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
 575                     &kernel_pt_table[KERNEL_PT_VMDATA + loop]);
 576
 577         /* update the top of the kernel VM */
 578         pmap_curmaxkvaddr =
 579             KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);
 580
 581 #ifdef VERBOSE_INIT_ARM
 582         printf("Mapping kernel\n");
 583 #endif
 584
 585         /* Now we fill in the L2 pagetable for the kernel static code/data */
 586         {
 587                 extern char etext[], _end[];
 588                 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE;
 589                 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE;
 590                 u_int logical;
 591
 592                 textsize = (textsize + PGOFSET) & ~PGOFSET;
 593                 totalsize = (totalsize + PGOFSET) & ~PGOFSET;
 594
 595                 logical = 0x00200000;   /* offset of kernel in RAM */
 596
 597                 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
 598                     physical_start + logical, textsize,
 599                     VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 600                 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
 601                     physical_start + logical, totalsize - textsize,
 602                     VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 603         }
 604
 605 #ifdef VERBOSE_INIT_ARM
 606         printf("Constructing L2 page tables\n");
 607 #endif
 608
 609         /* Map the stack pages */
 610         pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
 611             IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 612         pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
 613             ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 614         pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
 615             UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 616         pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
 617             UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 618
 619         pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
 620             L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
 621
 622         for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
 623                 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
 624                     kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
 625                     VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
 626         }
 627
 628         /* Map the Mini-Data cache clean area. */
 629         xscale_setup_minidata(l1pagetable, minidataclean.pv_va,
 630             minidataclean.pv_pa);
 631
 632         /* Map the vector page. */
 633         pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
 634             VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 635
 636         /* Map the statically mapped devices. */
 637         pmap_devmap_bootstrap(l1pagetable, iq80321_devmap);
 638
 639         /*
 640          * Give the XScale global cache clean code an appropriately
 641          * sized chunk of unmapped VA space starting at 0xff000000
 642          * (our device mappings end before this address).
 643          */
 644         xscale_cache_clean_addr = 0xff000000U;
 645
 646         /*
 647          * Now we have the real page tables in place so we can switch to them.
 648          * Once this is done we will be running with the REAL kernel page
 649          * tables.
 650          */
 651
 652         /*
 653          * Update the physical_freestart/physical_freeend/free_pages
 654          * variables.
 655          */
 656         {
 657                 extern char _end[];
 658
 659                 physical_freestart = physical_start +
 660                     (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) -
 661                      KERNEL_BASE);
 662                 physical_freeend = physical_end;
 663                 free_pages =
 664                     (physical_freeend - physical_freestart) / PAGE_SIZE;
 665         }
 666
 667         /* Switch tables */
 668 #ifdef VERBOSE_INIT_ARM
 669         printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
 670                physical_freestart, free_pages, free_pages);
 671         printf("switching to new L1 page table  @%#lx...", kernel_l1pt.pv_pa);
 672 #endif
 673         cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
 674         cpu_setttb(kernel_l1pt.pv_pa);
 675         cpu_tlb_flushID();
 676         cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
 677
 678         /*
 679          * Moved from cpu_startup() as data_abort_handler() references
 680          * this during uvm init
 681          */
 682         uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);
 683
 684 #ifdef VERBOSE_INIT_ARM
 685         printf("done!\n");
 686 #endif
 687
 688 #ifdef VERBOSE_INIT_ARM
 689         printf("bootstrap done.\n");
 690 #endif
 691
 692         arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
 693
 694         /*
 695          * Pages were allocated during the secondary bootstrap for the
 696          * stacks for different CPU modes.
 697          * We must now set the r13 registers in the different CPU modes to
 698          * point to these stacks.
 699          * Since the ARM stacks use STMFD etc. we must set r13 to the top end
 700          * of the stack memory.
 701          */
 702 #ifdef VERBOSE_INIT_ARM
 703         printf("init subsystems: stacks ");
 704 #endif
 705
 706         set_stackptr(PSR_IRQ32_MODE,
 707             irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
 708         set_stackptr(PSR_ABT32_MODE,
 709             abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
 710         set_stackptr(PSR_UND32_MODE,
 711             undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
 712
 713         /*
 714          * Well we should set a data abort handler.
 715          * Once things get going this will change as we will need a proper
 716          * handler.
 717          * Until then we will use a handler that just panics but tells us
 718          * why.
 719          * Initialisation of the vectors will just panic on a data abort.
 720          * This just fills in a slighly better one.
 721          */
 722 #ifdef VERBOSE_INIT_ARM
 723         printf("vectors ");
 724 #endif
 725         data_abort_handler_address = (u_int)data_abort_handler;
 726         prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
 727         undefined_handler_address = (u_int)undefinedinstruction_bounce;
 728
 729         /* Initialise the undefined instruction handlers */
 730 #ifdef VERBOSE_INIT_ARM
 731         printf("undefined ");
 732 #endif
 733         undefined_init();
 734
 735         /* Load memory into UVM. */
 736 #ifdef VERBOSE_INIT_ARM
 737         printf("page ");
 738 #endif
 739         uvm_setpagesize();      /* initialize PAGE_SIZE-dependent variables */
 740         uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
 741             atop(physical_freestart), atop(physical_freeend),
 742             VM_FREELIST_DEFAULT);
 743
 744         /* Boot strap pmap telling it where the kernel page table is */
 745 #ifdef VERBOSE_INIT_ARM
 746         printf("pmap ");
 747 #endif
 748         pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);
 749
 750         /* Setup the IRQ system */
 751 #ifdef VERBOSE_INIT_ARM
 752         printf("irq ");
 753 #endif
 754         i80321_intr_init();
 755
 756 #ifdef VERBOSE_INIT_ARM
 757         printf("done.\n");
 758 #endif
 759
 760 #ifdef BOOTHOWTO
 761         boothowto = BOOTHOWTO;
 762 #endif
 763
 764 #ifdef DDB
 765         db_machine_init();
 766         if (boothowto & RB_KDB)
 767                 Debugger();
 768 #endif
 769
 770         /* We return the new stack pointer address */
 771         return(kernelstack.pv_va + USPACE_SVC_STACK_TOP);
 772 }
 773
 774 void
 775 consinit(void)
 776 {
 777         static const bus_addr_t comcnaddrs[] = {
 778                 IQ80321_UART1,          /* com0 */
 779         };
 780         static int consinit_called;
 781
 782         if (consinit_called != 0)
 783                 return;
 784
 785         consinit_called = 1;
 786
 787         /*
 788          * Console devices are mapped VA==PA.  Our devmap reflects
 789          * this, so register it now so drivers can map the console
 790          * device.
 791          */
 792         pmap_devmap_register(iq80321_devmap);
 793
 794 #if NCOM > 0
 795         if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed,
 796             COM_FREQ, COM_TYPE_NORMAL, comcnmode))
 797                 panic("can't init serial console @%lx", comcnaddrs[comcnunit]);
 798 #else
 799         panic("serial console @%lx not configured", comcnaddrs[comcnunit]);
 800 #endif
 801 #if KGDB
 802 #if NCOM > 0
 803         if (strcmp(kgdb_devname, "com") == 0) {
 804                 com_kgdb_attach(&obio_bs_tag, kgdb_devaddr, kgdb_devrate,
 805                                 COM_FREQ, COM_TYPE_NORMAL, kgdb_devmode);
 806         }
 807 #endif  /* NCOM > 0 */
 808 #endif  /* KGDB */
 809 }