sys/arch/evbarm/ixdp425/ixdp425_machdep.c

   1 /*      $NetBSD$ */
   2 /*
   3  * Copyright (c) 2003
   4  *      Ichiro FUKUHARA <ichiro@ichiro.org>.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR
  17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19  * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR
  20  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28 /*
  29  * Copyright (c) 1997,1998 Mark Brinicombe.
  30  * Copyright (c) 1997,1998 Causality Limited.
  31  * All rights reserved.
  32  *
  33  * Redistribution and use in source and binary forms, with or without
  34  * modification, are permitted provided that the following conditions
  35  * are met:
  36  * 1. Redistributions of source code must retain the above copyright
  37  *    notice, this list of conditions and the following disclaimer.
  38  * 2. Redistributions in binary form must reproduce the above copyright
  39  *    notice, this list of conditions and the following disclaimer in the
  40  *    documentation and/or other materials provided with the distribution.
  41  * 3. All advertising materials mentioning features or use of this software
  42  *    must display the following acknowledgement:
  43  *      This product includes software developed by Mark Brinicombe
  44  *      for the NetBSD Project.
  45  * 4. The name of the company nor the name of the author may be used to
  46  *    endorse or promote products derived from this software without specific
  47  *    prior written permission.
  48  *
  49  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  50  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  51  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  52  * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  53  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  54  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  55  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  56  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  57  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  58  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  59  * SUCH DAMAGE.
  60  */
  61
  62 /* Machine dependant functions for kernel setup for Intel IXP425 evaluation
  63  * boards using RedBoot firmware.
  64  */
  65
  66 #include <sys/cdefs.h>
  67 __KERNEL_RCSID(0, "$NetBSD$");
  68
  69 #include "opt_ddb.h"
  70 #include "opt_kgdb.h"
  71 #include "opt_pmap_debug.h"
  72
  73 #include <sys/param.h>
  74 #include <sys/device.h>
  75 #include <sys/systm.h>
  76 #include <sys/kernel.h>
  77 #include <sys/exec.h>
  78 #include <sys/proc.h>
  79 #include <sys/msgbuf.h>
  80 #include <sys/reboot.h>
  81 #include <sys/termios.h>
  82 #include <sys/ksyms.h>
  83
  84 #include <uvm/uvm_extern.h>
  85
  86 #include <dev/cons.h>
  87
  88 #include <machine/db_machdep.h>
  89 #include <ddb/db_sym.h>
  90 #include <ddb/db_extern.h>
  91
  92 #include <machine/bootconfig.h>
  93 #include <machine/bus.h>
  94 #include <machine/cpu.h>
  95 #include <machine/frame.h>
  96 #include <arm/undefined.h>
  97
  98 #include <arm/arm32/machdep.h>
  99
 100 #include <arm/xscale/ixp425reg.h>
 101 #include <arm/xscale/ixp425var.h>
 102 #include <arm/xscale/ixp425_sipvar.h>
 103
 104 #include <evbarm/ixdp425/ixdp425reg.h>
 105
 106 #include "com.h"
 107 #if NCOM > 0
 108 #include <dev/ic/comreg.h>
 109 #include <dev/ic/comvar.h>
 110 #endif
 111
 112 #include "ksyms.h"
 113
 114 /* Kernel text starts 2MB in from the bottom of the kernel address space. */
 115 #define KERNEL_TEXT_BASE        (KERNEL_BASE + 0x00200000)
 116 #define KERNEL_VM_BASE          (KERNEL_BASE + 0x01000000)
 117
 118 /*
 119  * The range 0xc1000000 - 0xccffffff is available for kernel VM space
 120  * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff
 121  */
 122 #define KERNEL_VM_SIZE          0x0C000000
 123
 124
 125 /*
 126  * Address to call from cpu_reset() to reset the machine.
 127  * This is machine architecture dependant as it varies depending
 128  * on where the ROM appears when you turn the MMU off.
 129  */
 130
 131 u_int cpu_reset_address = 0x00000000;
 132
 133 /* Define various stack sizes in pages */
 134 #define IRQ_STACK_SIZE  1
 135 #define ABT_STACK_SIZE  1
 136 #define UND_STACK_SIZE  1
 137
 138 BootConfig bootconfig;          /* Boot config storage */
 139 char *boot_args = NULL;
 140 char *boot_file = NULL;
 141
 142 vm_offset_t physical_start;
 143 vm_offset_t physical_freestart;
 144 vm_offset_t physical_freeend;
 145 vm_offset_t physical_end;
 146 u_int free_pages;
 147
 148 /* Physical and virtual addresses for some global pages */
 149 pv_addr_t irqstack;
 150 pv_addr_t undstack;
 151 pv_addr_t abtstack;
 152 pv_addr_t kernelstack;
 153 pv_addr_t minidataclean;
 154
 155 vm_offset_t msgbufphys;
 156
 157 extern u_int data_abort_handler_address;
 158 extern u_int prefetch_abort_handler_address;
 159 extern u_int undefined_handler_address;
 160 extern int end;
 161
 162 #ifdef PMAP_DEBUG
 163 extern int pmap_debug_level;
 164 #endif
 165
 166 #define KERNEL_PT_SYS           0       /* L2 table for mapping zero page */
 167
 168 #define KERNEL_PT_KERNEL        1       /* L2 table for mapping kernel */
 169 #define KERNEL_PT_KERNEL_NUM    4
 170 #define KERNEL_PT_IO            (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM)
 171                                         /* L2 tables for mapping kernel VM */
 172 #define KERNEL_PT_VMDATA        (KERNEL_PT_IO + 1)
 173 #define KERNEL_PT_VMDATA_NUM    4       /* start with 16MB of KVM */
 174 #define NUM_KERNEL_PTS          (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM)
 175
 176 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS];
 177
 178 /* Prototypes */
 179
 180 void    consinit(void);
 181 u_int   cpu_get_control(void);
 182
 183 /*
 184  * Define the default console speed for the board.  This is generally
 185  * what the firmware provided with the board defaults to.
 186  */
 187 #ifndef CONSPEED
 188 #define CONSPEED B115200
 189 #endif /* ! CONSPEED */
 190
 191 #ifndef CONUNIT
 192 #define CONUNIT 0
 193 #endif
 194
 195 #ifndef CONMODE
 196 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */
 197 #endif
 198
 199 int comcnspeed = CONSPEED;
 200 int comcnmode = CONMODE;
 201 int comcnunit = CONUNIT;
 202
 203 #if KGDB
 204 #ifndef KGDB_DEVNAME
 205 #error Must define KGDB_DEVNAME
 206 #endif
 207 const char kgdb_devname[] = KGDB_DEVNAME;
 208
 209 #ifndef KGDB_DEVADDR
 210 #error Must define KGDB_DEVADDR
 211 #endif
 212 unsigned long kgdb_devaddr = KGDB_DEVADDR;
 213
 214 #ifndef KGDB_DEVRATE
 215 #define KGDB_DEVRATE    CONSPEED
 216 #endif
 217 int kgdb_devrate = KGDB_DEVRATE;
 218
 219 #ifndef KGDB_DEVMODE
 220 #define KGDB_DEVMODE    CONMODE
 221 #endif
 222 int kgdb_devmode = KGDB_DEVMODE;
 223 #endif /* KGDB */
 224
 225 /*
 226  * void cpu_reboot(int howto, char *bootstr)
 227  *
 228  * Reboots the system
 229  *
 230  * Deal with any syncing, unmounting, dumping and shutdown hooks,
 231  * then reset the CPU.
 232  */
 233 void
 234 cpu_reboot(int howto, char *bootstr)
 235 {
 236         u_int32_t reg;
 237
 238 #ifdef DIAGNOSTIC
 239         /* info */
 240         printf("boot: howto=%08x curproc=%p\n", howto, curproc);
 241 #endif
 242
 243         /*
 244          * If we are still cold then hit the air brakes
 245          * and crash to earth fast
 246          */
 247         if (cold) {
 248                 doshutdownhooks();
 249                 pmf_system_shutdown(boothowto);
 250                 printf("The operating system has halted.\n");
 251                 printf("Please press any key to reboot.\n\n");
 252                 cngetc();
 253                 printf("rebooting...\n");
 254                 goto reset;
 255         }
 256
 257         /* Disable console buffering */
 258
 259         /*
 260          * If RB_NOSYNC was not specified sync the discs.
 261          * Note: Unless cold is set to 1 here, syslogd will die during the
 262          * unmount.  It looks like syslogd is getting woken up only to find
 263          * that it cannot page part of the binary in as the filesystem has
 264          * been unmounted.
 265          */
 266         if (!(howto & RB_NOSYNC))
 267                 bootsync();
 268
 269         /* Say NO to interrupts */
 270         splhigh();
 271
 272         /* Do a dump if requested. */
 273         if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP)
 274                 dumpsys();
 275
 276         /* Run any shutdown hooks */
 277         doshutdownhooks();
 278
 279         pmf_system_shutdown(boothowto);
 280
 281         /* Make sure IRQ's are disabled */
 282         IRQdisable;
 283
 284         if (howto & RB_HALT) {
 285                 printf("The operating system has halted.\n");
 286                 printf("Please press any key to reboot.\n\n");
 287                 cngetc();
 288         }
 289
 290         printf("rebooting...\n\r");
 291  reset:
 292         /*
 293          * Make really really sure that all interrupts are disabled,
 294          */
 295         (void) disable_interrupts(I32_bit|F32_bit);
 296         IXPREG(IXP425_INT_ENABLE) = 0;
 297
 298         /*
 299          * Map the boot Flash device down at physical address 0.
 300          * This is safe since NetBSD runs out of an alias of
 301          * SDRAM at 0x10000000.
 302          */
 303         reg = EXP_CSR_READ_4(ixpsip_softc, EXP_CNFG0_OFFSET);
 304         reg |= EXP_CNFG0_MEM_MAP;
 305         EXP_CSR_WRITE_4(ixpsip_softc, EXP_CNFG0_OFFSET, reg);
 306
 307         /*
 308          * Jump into the bootcode's reset vector
 309          *
 310          * XXX:
 311          * Redboot doesn't like the state in which we leave the PCI
 312          * ethernet card, and so fails to detect it on reboot. This
 313          * pretty much necessitates a hard reset/power cycle to be
 314          * able to download a new kernel image over ethernet.
 315          *
 316          * I suspect this is due to a bug in Redboot's i82557 driver.
 317          */
 318         cpu_reset();
 319
 320         /* ...and if that didn't work, just croak. */
 321         printf("RESET FAILED!\n");
 322         for (;;);
 323 }
 324
 325 /* Static device mappings. */
 326 static const struct pmap_devmap ixp425_devmap[] = {
 327         /* Physical/Virtual address for I/O space */
 328     {
 329         IXP425_IO_VBASE,
 330         IXP425_IO_HWBASE,
 331         IXP425_IO_SIZE,
 332         VM_PROT_READ|VM_PROT_WRITE,
 333         PTE_NOCACHE,
 334     },
 335
 336         /* Expansion Bus */
 337     {
 338         IXP425_EXP_VBASE,
 339         IXP425_EXP_HWBASE,
 340         IXP425_EXP_SIZE,
 341         VM_PROT_READ|VM_PROT_WRITE,
 342         PTE_NOCACHE,
 343     },
 344
 345         /* IXP425 PCI Configuration */
 346     {
 347         IXP425_PCI_VBASE,
 348         IXP425_PCI_HWBASE,
 349         IXP425_PCI_SIZE,
 350         VM_PROT_READ|VM_PROT_WRITE,
 351         PTE_NOCACHE,
 352     },
 353
 354         /* SDRAM Controller */
 355     {
 356         IXP425_MCU_VBASE,
 357         IXP425_MCU_HWBASE,
 358         IXP425_MCU_SIZE,
 359         VM_PROT_READ|VM_PROT_WRITE,
 360         PTE_NOCACHE,
 361     },
 362
 363         /* PCI Memory Space */
 364     {
 365         IXP425_PCI_MEM_VBASE,
 366         IXP425_PCI_MEM_HWBASE,
 367         IXP425_PCI_MEM_SIZE,
 368         VM_PROT_READ|VM_PROT_WRITE,
 369         PTE_NOCACHE,
 370     },
 371
 372     {
 373         0,
 374         0,
 375         0,
 376         0,
 377         0,
 378     }
 379 };
 380
 381 /*
 382  * u_int initarm(...)
 383  *
 384  * Initial entry point on startup. This gets called before main() is
 385  * entered.
 386  * It should be responsible for setting up everything that must be
 387  * in place when main is called.
 388  * This includes
 389  *   Taking a copy of the boot configuration structure.
 390  *   Initialising the physical console so characters can be printed.
 391  *   Setting up page tables for the kernel
 392  *   Relocating the kernel to the bottom of physical memory
 393  */
 394 u_int
 395 initarm(void *arg)
 396 {
 397         extern vaddr_t xscale_cache_clean_addr;
 398 #ifdef DIAGNOSTIC
 399         extern vsize_t xscale_minidata_clean_size;
 400 #endif
 401         int loop;
 402         int loop1;
 403         u_int kerneldatasize;
 404         u_int l1pagetable;
 405         u_int freemempos;
 406
 407         /*
 408          * Since we map v0xf0000000 == p0xc8000000, it's possible for
 409          * us to initialize the console now.
 410          */
 411         consinit();
 412
 413 #ifdef VERBOSE_INIT_ARM
 414         /* Talk to the user */
 415         printf("\nNetBSD/evbarm (Intel IXDP425) booting ...\n");
 416 #endif
 417
 418         /*
 419          * Heads up ... Setup the CPU / MMU / TLB functions
 420          */
 421         if (set_cpufuncs())
 422                 panic("cpu not recognized!");
 423
 424         /* XXX overwrite bootconfig to hardcoded values */
 425         bootconfig.dramblocks = 1;
 426         bootconfig.dram[0].address = 0x10000000;
 427         bootconfig.dram[0].pages = ixp425_sdram_size() / PAGE_SIZE;
 428
 429         kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE;
 430
 431 #ifdef VERBOSE_INIT_ARM
 432         printf("kernsize=0x%x\n", kerneldatasize);
 433 #endif
 434         kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8;
 435
 436         /*
 437          * Set up the variables that define the availablilty of
 438          * physical memory.  For now, we're going to set
 439          * physical_freestart to 0x10200000 (where the kernel
 440          * was loaded), and allocate the memory we need downwards.
 441          * If we get too close to the L1 table that we set up, we
 442          * will panic.  We will update physical_freestart and
 443          * physical_freeend later to reflect what pmap_bootstrap()
 444          * wants to see.
 445          *
 446          * XXX pmap_bootstrap() needs an enema.
 447          */
 448         physical_start = bootconfig.dram[0].address;
 449         physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE);
 450
 451         physical_freestart = physical_start
 452                 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize;
 453         physical_freeend = physical_end;
 454
 455         physmem = (physical_end - physical_start) / PAGE_SIZE;
 456
 457         /* Tell the user about the memory */
 458 #ifdef VERBOSE_INIT_ARM
 459         printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem,
 460             physical_start, physical_end - 1);
 461
 462         printf("Allocating page tables\n");
 463 #endif
 464         free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;
 465
 466         freemempos = 0x10000000;
 467
 468 #ifdef VERBOSE_INIT_ARM
 469         printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n",
 470                 physical_start, physical_end);
 471 #endif
 472
 473         /* Define a macro to simplify memory allocation */
 474 #define valloc_pages(var, np)                           \
 475         alloc_pages((var).pv_pa, (np));                 \
 476         (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;
 477
 478 #if 0
 479 #define alloc_pages(var, np)                            \
 480         physical_freeend -= ((np) * PAGE_SIZE);         \
 481         if (physical_freeend < physical_freestart)      \
 482                 panic("initarm: out of memory");        \
 483         (var) = physical_freeend;                       \
 484         free_pages -= (np);                             \
 485         memset((char *)(var), 0, ((np) * PAGE_SIZE));
 486 #else
 487 #define alloc_pages(var, np)                            \
 488         (var) = freemempos;                             \
 489         memset((char *)(var), 0, ((np) * PAGE_SIZE));   \
 490         freemempos += (np) * PAGE_SIZE;
 491 #endif
 492
 493         loop1 = 0;
 494         for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
 495                 /* Are we 16KB aligned for an L1 ? */
 496                 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0
 497                     && kernel_l1pt.pv_pa == 0) {
 498                         valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
 499                 } else {
 500                         valloc_pages(kernel_pt_table[loop1],
 501                             L2_TABLE_SIZE / PAGE_SIZE);
 502                         ++loop1;
 503                 }
 504         }
 505
 506         /* This should never be able to happen but better confirm that. */
 507         if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0)
 508                 panic("initarm: Failed to align the kernel page directory");
 509
 510         /*
 511          * Allocate a page for the system page.
 512          * This page will just contain the system vectors and can be
 513          * shared by all processes.
 514          */
 515         alloc_pages(systempage.pv_pa, 1);
 516
 517         /* Allocate stacks for all modes */
 518         valloc_pages(irqstack, IRQ_STACK_SIZE);
 519         valloc_pages(abtstack, ABT_STACK_SIZE);
 520         valloc_pages(undstack, UND_STACK_SIZE);
 521         valloc_pages(kernelstack, UPAGES);
 522
 523         /* Allocate enough pages for cleaning the Mini-Data cache. */
 524         KASSERT(xscale_minidata_clean_size <= PAGE_SIZE);
 525         valloc_pages(minidataclean, 1);
 526
 527 #ifdef VERBOSE_INIT_ARM
 528         printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa,
 529             irqstack.pv_va);
 530         printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa,
 531             abtstack.pv_va);
 532         printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa,
 533             undstack.pv_va);
 534         printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa,
 535             kernelstack.pv_va);
 536 #endif
 537
 538         /*
 539          * XXX Defer this to later so that we can reclaim the memory
 540          * XXX used by the RedBoot page tables.
 541          */
 542         alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);
 543
 544         /*
 545          * Ok we have allocated physical pages for the primary kernel
 546          * page tables
 547          */
 548
 549 #ifdef VERBOSE_INIT_ARM
 550         printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa);
 551 #endif
 552
 553         /*
 554          * Now we start construction of the L1 page table
 555          * We start by mapping the L2 page tables into the L1.
 556          * This means that we can replace L1 mappings later on if necessary
 557          */
 558         l1pagetable = kernel_l1pt.pv_pa;
 559
 560         /* Map the L2 pages tables in the L1 page table */
 561         pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1),
 562             &kernel_pt_table[KERNEL_PT_SYS]);
 563         for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++)
 564                 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000,
 565                     &kernel_pt_table[KERNEL_PT_KERNEL + loop]);
 566         for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++)
 567                 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
 568                     &kernel_pt_table[KERNEL_PT_VMDATA + loop]);
 569
 570         /* update the top of the kernel VM */
 571         pmap_curmaxkvaddr =
 572             KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);
 573
 574         pmap_link_l2pt(l1pagetable, IXP425_IO_VBASE,
 575             &kernel_pt_table[KERNEL_PT_IO]);
 576
 577 #ifdef VERBOSE_INIT_ARM
 578         printf("Mapping kernel\n");
 579 #endif
 580
 581         /* Now we fill in the L2 pagetable for the kernel static code/data */
 582         {
 583                 extern char etext[], _end[];
 584                 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE;
 585                 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE;
 586                 u_int logical;
 587
 588                 textsize = (textsize + PGOFSET) & ~PGOFSET;
 589                 totalsize = (totalsize + PGOFSET) & ~PGOFSET;
 590
 591                 logical = 0x00200000;   /* offset of kernel in RAM */
 592
 593                 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
 594                     physical_start + logical, textsize,
 595                     VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 596                 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
 597                     physical_start + logical, totalsize - textsize,
 598                     VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 599         }
 600
 601 #ifdef VERBOSE_INIT_ARM
 602         printf("Constructing L2 page tables\n");
 603 #endif
 604
 605         /* Map the stack pages */
 606         pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
 607             IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 608         pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
 609             ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 610         pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
 611             UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 612         pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
 613             UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 614
 615         pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
 616             L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
 617
 618         for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
 619                 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
 620                     kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
 621                     VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
 622         }
 623
 624         /* Map the Mini-Data cache clean area. */
 625         xscale_setup_minidata(l1pagetable, minidataclean.pv_va,
 626             minidataclean.pv_pa);
 627
 628         /* Map the vector page. */
 629         pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
 630             VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 631
 632         /*
 633          * Map the IXP425 registers
 634          */
 635         pmap_devmap_bootstrap(l1pagetable, ixp425_devmap);
 636
 637         /*
 638          * Give the XScale global cache clean code an appropriately
 639          * sized chunk of unmapped VA space starting at 0xff000000
 640          * (our device mappings end before this address).
 641          */
 642         xscale_cache_clean_addr = 0xff000000U;
 643
 644         /*
 645          * Now we have the real page tables in place so we can switch to them.
 646          * Once this is done we will be running with the REAL kernel page
 647          * tables.
 648          */
 649
 650         /*
 651          * Update the physical_freestart/physical_freeend/free_pages
 652          * variables.
 653          */
 654         {
 655                 extern char _end[];
 656
 657                 physical_freestart = physical_start +
 658                     (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) -
 659                      KERNEL_BASE);
 660                 physical_freeend = physical_end;
 661                 free_pages =
 662                     (physical_freeend - physical_freestart) / PAGE_SIZE;
 663         }
 664
 665         /* Switch tables */
 666 #ifdef VERBOSE_INIT_ARM
 667         printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
 668                physical_freestart, free_pages, free_pages);
 669         printf("switching to new L1 page table  @%#lx...", kernel_l1pt.pv_pa);
 670 #endif
 671         cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
 672         cpu_setttb(kernel_l1pt.pv_pa);
 673         cpu_tlb_flushID();
 674         cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
 675
 676         /*
 677          * Moved from cpu_startup() as data_abort_handler() references
 678          * this during uvm init
 679          */
 680         uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);
 681
 682 #ifdef VERBOSE_INIT_ARM
 683         printf("bootstrap done.\n");
 684 #endif
 685
 686         arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
 687
 688         /*
 689          * Pages were allocated during the secondary bootstrap for the
 690          * stacks for different CPU modes.
 691          * We must now set the r13 registers in the different CPU modes to
 692          * point to these stacks.
 693          * Since the ARM stacks use STMFD etc. we must set r13 to the top end
 694          * of the stack memory.
 695          */
 696 #ifdef VERBOSE_INIT_ARM
 697         printf("init subsystems: stacks ");
 698 #endif
 699
 700         set_stackptr(PSR_IRQ32_MODE,
 701             irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
 702         set_stackptr(PSR_ABT32_MODE,
 703             abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
 704         set_stackptr(PSR_UND32_MODE,
 705             undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
 706
 707         /*
 708          * Well we should set a data abort handler.
 709          * Once things get going this will change as we will need a proper
 710          * handler.
 711          * Until then we will use a handler that just panics but tells us
 712          * why.
 713          * Initialisation of the vectors will just panic on a data abort.
 714          * This just fills in a slightly better one.
 715          */
 716 #ifdef VERBOSE_INIT_ARM
 717         printf("vectors ");
 718 #endif
 719         data_abort_handler_address = (u_int)data_abort_handler;
 720         prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
 721         undefined_handler_address = (u_int)undefinedinstruction_bounce;
 722
 723         /* Initialise the undefined instruction handlers */
 724 #ifdef VERBOSE_INIT_ARM
 725         printf("undefined ");
 726 #endif
 727         undefined_init();
 728
 729         /* Load memory into UVM. */
 730 #ifdef VERBOSE_INIT_ARM
 731         printf("page ");
 732 #endif
 733         uvm_setpagesize();      /* initialize PAGE_SIZE-dependent variables */
 734         uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
 735             atop(physical_freestart), atop(physical_freeend),
 736             VM_FREELIST_DEFAULT);
 737
 738         /* Boot strap pmap telling it where the kernel page table is */
 739 #ifdef VERBOSE_INIT_ARM
 740         printf("pmap ");
 741 #endif
 742         pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);
 743
 744         /* Setup the IRQ system */
 745 #ifdef VERBOSE_INIT_ARM
 746         printf("irq ");
 747 #endif
 748         ixp425_intr_init();
 749 #ifdef VERBOSE_INIT_ARM
 750         printf("\nAll initialize done!\nNow Starting NetBSD, Hear we go!\n");
 751 #endif
 752
 753 #ifdef BOOTHOWTO
 754         boothowto = BOOTHOWTO;
 755 #endif
 756
 757 #ifdef DDB
 758         db_machine_init();
 759         if (boothowto & RB_KDB)
 760                 Debugger();
 761 #endif
 762
 763         /* We return the new stack pointer address */
 764         return(kernelstack.pv_va + USPACE_SVC_STACK_TOP);
 765 }
 766
 767 /*
 768  * consinit
 769  */
 770 void
 771 consinit(void)
 772 {
 773         static int consinit_called;
 774         static const bus_addr_t addrs[2] = {
 775                 IXP425_UART0_HWBASE, IXP425_UART1_HWBASE
 776         };
 777
 778         if (consinit_called != 0)
 779                 return;
 780
 781         consinit_called = 1;
 782
 783         pmap_devmap_register(ixp425_devmap);
 784
 785         if (comcnattach(&ixp425_a4x_bs_tag, addrs[comcnunit],
 786             comcnspeed, IXP425_UART_FREQ, COM_TYPE_PXA2x0, comcnmode))
 787                 panic("can't init serial console (UART%d)", comcnunit);
 788 }