sys/arch/evbarm/tsarm/tsarm_machdep.c

   1 /*      $NetBSD$ */
   2
   3 /*
   4  * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc.
   5  * All rights reserved.
   6  *
   7  * Based on code written by Jason R. Thorpe and Steve C. Woodford for
   8  * Wasabi Systems, Inc.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. All advertising materials mentioning features or use of this software
  19  *    must display the following acknowledgement:
  20  *      This product includes software developed for the NetBSD Project by
  21  *      Wasabi Systems, Inc.
  22  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
  23  *    or promote products derived from this software without specific prior
  24  *    written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
  30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  36  * POSSIBILITY OF SUCH DAMAGE.
  37  */
  38
  39 /*
  40  * Copyright (c) 1997,1998 Mark Brinicombe.
  41  * Copyright (c) 1997,1998 Causality Limited.
  42  * All rights reserved.
  43  *
  44  * Redistribution and use in source and binary forms, with or without
  45  * modification, are permitted provided that the following conditions
  46  * are met:
  47  * 1. Redistributions of source code must retain the above copyright
  48  *    notice, this list of conditions and the following disclaimer.
  49  * 2. Redistributions in binary form must reproduce the above copyright
  50  *    notice, this list of conditions and the following disclaimer in the
  51  *    documentation and/or other materials provided with the distribution.
  52  * 3. All advertising materials mentioning features or use of this software
  53  *    must display the following acknowledgement:
  54  *      This product includes software developed by Mark Brinicombe
  55  *      for the NetBSD Project.
  56  * 4. The name of the company nor the name of the author may be used to
  57  *    endorse or promote products derived from this software without specific
  58  *    prior written permission.
  59  *
  60  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  61  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  62  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  63  * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  64  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  65  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  66  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  67  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  68  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  69  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  70  * SUCH DAMAGE.
  71  *
  72  * Machine dependant functions for kernel setup for Iyonix.
  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 <acorn32/include/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/ep93xx/ep93xxreg.h>
 110 #include <arm/ep93xx/ep93xxvar.h>
 111
 112 #include <dev/ic/comreg.h>
 113 #include <dev/ic/comvar.h>
 114
 115 #include "epcom.h"
 116 #if NEPCOM > 0
 117 #include <arm/ep93xx/epcomvar.h>
 118 #endif
 119
 120 #include "isa.h"
 121 #if NISA > 0
 122 #include <dev/isa/isareg.h>
 123 #include <dev/isa/isavar.h>
 124 #endif
 125
 126 #include <machine/isa_machdep.h>
 127
 128 #include <evbarm/tsarm/tsarmreg.h>
 129
 130 #include "ksyms.h"
 131
 132 /* Kernel text starts 2MB in from the bottom of the kernel address space. */
 133 #define KERNEL_TEXT_BASE        (KERNEL_BASE + 0x00200000)
 134 #define KERNEL_VM_BASE          (KERNEL_BASE + 0x01000000)
 135
 136 /*
 137  * The range 0xc1000000 - 0xccffffff is available for kernel VM space
 138  * Core-logic registers and I/O mappings occupy 0xf0000000 - 0xffffffff
 139  */
 140 #define KERNEL_VM_SIZE          0x0C000000
 141
 142 /*
 143  * Address to call from cpu_reset() to reset the machine.
 144  * This is machine architecture dependant as it varies depending
 145  * on where the ROM appears when you turn the MMU off.
 146  */
 147
 148 u_int cpu_reset_address = 0x00000000;
 149
 150 /* Define various stack sizes in pages */
 151 #define IRQ_STACK_SIZE  8
 152 #define ABT_STACK_SIZE  8
 153 #define UND_STACK_SIZE  8
 154
 155 struct bootconfig bootconfig;           /* Boot config storage */
 156 char *boot_args = NULL;
 157 char *boot_file = NULL;
 158
 159 vm_offset_t physical_start;
 160 vm_offset_t physical_freestart;
 161 vm_offset_t physical_freeend;
 162 vm_offset_t physical_freeend_low;
 163 vm_offset_t physical_end;
 164 u_int free_pages;
 165
 166 /* Physical and virtual addresses for some global pages */
 167 pv_addr_t irqstack;
 168 pv_addr_t undstack;
 169 pv_addr_t abtstack;
 170 pv_addr_t kernelstack;
 171
 172 vm_offset_t msgbufphys;
 173
 174 static struct arm32_dma_range tsarm_dma_ranges[4];
 175
 176 #if NISA > 0
 177 extern void isa_tsarm_init(u_int, u_int);
 178 #endif
 179
 180 extern u_int data_abort_handler_address;
 181 extern u_int prefetch_abort_handler_address;
 182 extern u_int undefined_handler_address;
 183
 184 #ifdef PMAP_DEBUG
 185 extern int pmap_debug_level;
 186 #endif
 187
 188 #define KERNEL_PT_SYS           0       /* L2 table for mapping vectors page */
 189
 190 #define KERNEL_PT_KERNEL        1       /* L2 table for mapping kernel */
 191 #define KERNEL_PT_KERNEL_NUM    4
 192                                         /* L2 tables for mapping kernel VM */
 193 #define KERNEL_PT_VMDATA        (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM)
 194
 195 #define KERNEL_PT_VMDATA_NUM    4       /* start with 16MB of KVM */
 196 #define NUM_KERNEL_PTS          (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM)
 197
 198 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS];
 199
 200 /* Prototypes */
 201
 202 void    consinit(void);
 203 /*
 204  * Define the default console speed for the machine.
 205  */
 206 #ifndef CONSPEED
 207 #define CONSPEED B115200
 208 #endif /* ! CONSPEED */
 209
 210 #ifndef CONMODE
 211 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
 212 #endif
 213
 214 int comcnspeed = CONSPEED;
 215 int comcnmode = CONMODE;
 216
 217 #if KGDB
 218 #ifndef KGDB_DEVNAME
 219 #error Must define KGDB_DEVNAME
 220 #endif
 221 const char kgdb_devname[] = KGDB_DEVNAME;
 222
 223 #ifndef KGDB_DEVADDR
 224 #error Must define KGDB_DEVADDR
 225 #endif
 226 unsigned long kgdb_devaddr = KGDB_DEVADDR;
 227
 228 #ifndef KGDB_DEVRATE
 229 #define KGDB_DEVRATE    CONSPEED
 230 #endif
 231 int kgdb_devrate = KGDB_DEVRATE;
 232
 233 #ifndef KGDB_DEVMODE
 234 #define KGDB_DEVMODE    CONMODE
 235 #endif
 236 int kgdb_devmode = KGDB_DEVMODE;
 237 #endif /* KGDB */
 238
 239 /*
 240  * void cpu_reboot(int howto, char *bootstr)
 241  *
 242  * Reboots the system
 243  *
 244  * Deal with any syncing, unmounting, dumping and shutdown hooks,
 245  * then reset the CPU.
 246  */
 247 void
 248 cpu_reboot(int howto, char *bootstr)
 249 {
 250
 251         /*
 252          * If we are still cold then hit the air brakes
 253          * and crash to earth fast
 254          */
 255         if (cold) {
 256                 doshutdownhooks();
 257                 pmf_system_shutdown(boothowto);
 258                 printf("\r\n");
 259                 printf("The operating system has halted.\r\n");
 260                 printf("Please press any key to reboot.\r\n");
 261                 cngetc();
 262                 printf("\r\nrebooting...\r\n");
 263                 goto reset;
 264         }
 265
 266         /* Disable console buffering */
 267
 268         /*
 269          * If RB_NOSYNC was not specified sync the discs.
 270          * Note: Unless cold is set to 1 here, syslogd will die during the
 271          * unmount.  It looks like syslogd is getting woken up only to find
 272          * that it cannot page part of the binary in as the filesystem has
 273          * been unmounted.
 274          */
 275         if (!(howto & RB_NOSYNC))
 276                 bootsync();
 277
 278         /* Say NO to interrupts */
 279         splhigh();
 280
 281         /* Do a dump if requested. */
 282         if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP)
 283                 dumpsys();
 284
 285         /* Run any shutdown hooks */
 286         doshutdownhooks();
 287
 288         pmf_system_shutdown(boothowto);
 289
 290         /* Make sure IRQ's are disabled */
 291         IRQdisable;
 292
 293         if (howto & RB_HALT) {
 294                 printf("\r\n");
 295                 printf("The operating system has halted.\r\n");
 296                 printf("Please press any key to reboot.\r\n");
 297                 cngetc();
 298         }
 299
 300         printf("\r\nrebooting...\r\n");
 301  reset:
 302         /*
 303          * Make really really sure that all interrupts are disabled,
 304          * and poke the Internal Bus and Peripheral Bus reset lines.
 305          */
 306         (void) disable_interrupts(I32_bit|F32_bit);
 307
 308         {
 309                 u_int32_t feed, ctrl;
 310
 311                 feed = TS7XXX_IO16_VBASE + TS7XXX_WDOGFEED;
 312                 ctrl = TS7XXX_IO16_VBASE + TS7XXX_WDOGCTRL;
 313
 314                 __asm volatile (
 315                         "mov r0, #0x5\n"
 316                         "mov r1, #0x1\n"
 317                         "strh r0, [%0]\n"
 318                         "strh r1, [%1]\n"
 319                         :
 320                         : "r" (feed), "r" (ctrl)
 321                         : "r0", "r1"
 322                 );
 323         }
 324
 325         for (;;);
 326 }
 327
 328 /* Static device mappings. */
 329 static const struct pmap_devmap tsarm_devmap[] = {
 330     {
 331         EP93XX_AHB_VBASE,
 332         EP93XX_AHB_HWBASE,
 333         EP93XX_AHB_SIZE,
 334         VM_PROT_READ|VM_PROT_WRITE,
 335         PTE_NOCACHE,
 336     },
 337
 338     {
 339         EP93XX_APB_VBASE,
 340         EP93XX_APB_HWBASE,
 341         EP93XX_APB_SIZE,
 342         VM_PROT_READ|VM_PROT_WRITE,
 343         PTE_NOCACHE,
 344     },
 345
 346         /*
 347          * IO8 and IO16 space *must* be mapped contiguously with
 348          * IO8_VA == IO16_VA - 64 Mbytes.  ISA busmap driver depends
 349          * on that!
 350          */
 351     {
 352         TS7XXX_IO8_VBASE,
 353         TS7XXX_IO8_HWBASE,
 354         TS7XXX_IO8_SIZE,
 355         VM_PROT_READ|VM_PROT_WRITE,
 356         PTE_NOCACHE,
 357     },
 358
 359     {
 360         TS7XXX_IO16_VBASE,
 361         TS7XXX_IO16_HWBASE,
 362         TS7XXX_IO16_SIZE,
 363         VM_PROT_READ|VM_PROT_WRITE,
 364         PTE_NOCACHE,
 365     },
 366
 367    {
 368         0,
 369         0,
 370         0,
 371         0,
 372         0,
 373     }
 374 };
 375
 376 /*
 377  * u_int initarm(...)
 378  *
 379  * Initial entry point on startup. This gets called before main() is
 380  * entered.
 381  * It should be responsible for setting up everything that must be
 382  * in place when main is called.
 383  * This includes
 384  *   Taking a copy of the boot configuration structure.
 385  *   Initialising the physical console so characters can be printed.
 386  *   Setting up page tables for the kernel
 387  *   Initialising interrupt controllers to a sane default state
 388  */
 389 u_int
 390 initarm(void *arg)
 391 {
 392 #ifdef FIXME
 393         struct bootconfig *passed_bootconfig = arg;
 394         extern char _end[];
 395 #endif
 396         int loop;
 397         int loop1;
 398         u_int l1pagetable;
 399         paddr_t memstart;
 400         psize_t memsize;
 401
 402 #ifdef FIXME
 403         /* Calibrate the delay loop. */
 404         i80321_calibrate_delay();
 405 #endif
 406
 407         /*
 408          * Since we map the on-board devices VA==PA, and the kernel
 409          * is running VA==PA, it's possible for us to initialize
 410          * the console now.
 411          */
 412         consinit();
 413
 414 #ifdef VERBOSE_INIT_ARM
 415         /* Talk to the user */
 416         printf("\nNetBSD/tsarm booting ...\n");
 417 #endif
 418
 419         /*
 420          * Heads up ... Setup the CPU / MMU / TLB functions
 421          */
 422         if (set_cpufuncs())
 423                 panic("cpu not recognized!");
 424
 425         /*
 426          * We are currently running with the MMU enabled
 427          */
 428
 429 #ifdef FIXME
 430         /*
 431          * Fetch the SDRAM start/size from the i80321 SDRAM configuration
 432          * registers.
 433          */
 434         i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE,
 435             &memstart, &memsize);
 436 #else
 437         memstart = 0x0;
 438         memsize = 0x2000000;
 439 #endif
 440
 441 #ifdef VERBOSE_INIT_ARM
 442         printf("initarm: Configuring system ...\n");
 443 #endif
 444
 445         /* Fake bootconfig structure for the benefit of pmap.c */
 446         /* XXX must make the memory description h/w independent */
 447         bootconfig.dramblocks = 4;
 448         bootconfig.dram[0].address = 0x0UL;
 449         bootconfig.dram[0].pages = 0x800000UL / PAGE_SIZE;
 450         bootconfig.dram[1].address = 0x1000000UL;
 451         bootconfig.dram[1].pages = 0x800000UL / PAGE_SIZE;
 452         bootconfig.dram[2].address = 0x4000000UL;
 453         bootconfig.dram[2].pages = 0x800000UL / PAGE_SIZE;
 454         bootconfig.dram[3].address = 0x5000000UL;
 455         bootconfig.dram[3].pages = 0x800000UL / 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 0x00200000 (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 = bootconfig.dram[0].address +
 471                 (bootconfig.dram[0].pages * PAGE_SIZE);
 472
 473         physical_freestart = 0x00009000UL;
 474         physical_freeend = 0x00200000UL;
 475
 476         physmem = (physical_end - physical_start) / PAGE_SIZE;
 477
 478 #ifdef VERBOSE_INIT_ARM
 479         /* Tell the user about the memory */
 480         printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem,
 481             physical_start, physical_end - 1);
 482 #endif
 483
 484         /*
 485          * Okay, the kernel starts 2MB in from the bottom of physical
 486          * memory.  We are going to allocate our bootstrap pages downwards
 487          * from there.
 488          *
 489          * We need to allocate some fixed page tables to get the kernel
 490          * going.  We allocate one page directory and a number of page
 491          * tables and store the physical addresses in the kernel_pt_table
 492          * array.
 493          *
 494          * The kernel page directory must be on a 16K boundary.  The page
 495          * tables must be on 4K bounaries.  What we do is allocate the
 496          * page directory on the first 16K boundary that we encounter, and
 497          * the page tables on 4K boundaries otherwise.  Since we allocate
 498          * at least 3 L2 page tables, we are guaranteed to encounter at
 499          * least one 16K aligned region.
 500          */
 501
 502 #ifdef VERBOSE_INIT_ARM
 503         printf("Allocating page tables\n");
 504 #endif
 505
 506         free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;
 507
 508 #ifdef VERBOSE_INIT_ARM
 509         printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n",
 510                physical_freestart, free_pages, free_pages);
 511 #endif
 512
 513         /* Define a macro to simplify memory allocation */
 514 #define valloc_pages(var, np)                           \
 515         alloc_pages((var).pv_pa, (np));                 \
 516         (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;
 517
 518 #define alloc_pages(var, np)                            \
 519         physical_freeend -= ((np) * PAGE_SIZE);         \
 520         if (physical_freeend < physical_freestart)      \
 521                 panic("initarm: out of memory");        \
 522         (var) = physical_freeend;                       \
 523         free_pages -= (np);                             \
 524         memset((char *)(var), 0, ((np) * PAGE_SIZE));
 525
 526         loop1 = 0;
 527         for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
 528                 /* Are we 16KB aligned for an L1 ? */
 529                 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0
 530                     && kernel_l1pt.pv_pa == 0) {
 531                         valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
 532                 } else {
 533                         valloc_pages(kernel_pt_table[loop1],
 534                             L2_TABLE_SIZE / PAGE_SIZE);
 535                         ++loop1;
 536                 }
 537         }
 538
 539         /* This should never be able to happen but better confirm that. */
 540         if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0)
 541                 panic("initarm: Failed to align the kernel page directory");
 542
 543         /*
 544          * Allocate a page for the system vectors page
 545          */
 546         alloc_pages(systempage.pv_pa, 1);
 547
 548         /* Allocate stacks for all modes */
 549         valloc_pages(irqstack, IRQ_STACK_SIZE);
 550         valloc_pages(abtstack, ABT_STACK_SIZE);
 551         valloc_pages(undstack, UND_STACK_SIZE);
 552         valloc_pages(kernelstack, UPAGES);
 553
 554 #ifdef VERBOSE_INIT_ARM
 555         printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa,
 556             irqstack.pv_va);
 557         printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa,
 558             abtstack.pv_va);
 559         printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa,
 560             undstack.pv_va);
 561         printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa,
 562             kernelstack.pv_va);
 563 #endif
 564
 565         alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);
 566
 567         /*
 568          * Ok we have allocated physical pages for the primary kernel
 569          * page tables.  Save physical_freeend for when we give whats left
 570          * of memory below 2Mbyte to UVM.
 571          */
 572
 573         physical_freeend_low = physical_freeend;
 574
 575 #ifdef VERBOSE_INIT_ARM
 576         printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa);
 577 #endif
 578
 579         /*
 580          * Now we start construction of the L1 page table
 581          * We start by mapping the L2 page tables into the L1.
 582          * This means that we can replace L1 mappings later on if necessary
 583          */
 584         l1pagetable = kernel_l1pt.pv_pa;
 585
 586         /* Map the L2 pages tables in the L1 page table */
 587         pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1),
 588             &kernel_pt_table[KERNEL_PT_SYS]);
 589         for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++)
 590                 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000,
 591                     &kernel_pt_table[KERNEL_PT_KERNEL + loop]);
 592         for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++)
 593                 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
 594                     &kernel_pt_table[KERNEL_PT_VMDATA + loop]);
 595
 596         /* update the top of the kernel VM */
 597         pmap_curmaxkvaddr =
 598             KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);
 599
 600 #ifdef VERBOSE_INIT_ARM
 601         printf("Mapping kernel\n");
 602 #endif
 603
 604         /* Now we fill in the L2 pagetable for the kernel static code/data */
 605         {
 606                 extern char etext[], _end[];
 607                 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE;
 608                 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE;
 609                 u_int logical;
 610
 611                 textsize = (textsize + PGOFSET) & ~PGOFSET;
 612                 totalsize = (totalsize + PGOFSET) & ~PGOFSET;
 613
 614                 logical = 0x00200000;   /* offset of kernel in RAM */
 615                 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
 616                     physical_start + logical, textsize,
 617                     VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 618                 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
 619                     physical_start + logical, totalsize - textsize,
 620                     VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 621         }
 622
 623 #ifdef VERBOSE_INIT_ARM
 624         printf("Constructing L2 page tables\n");
 625 #endif
 626
 627         /* Map the stack pages */
 628         pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
 629             IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 630         pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
 631             ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 632         pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
 633             UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 634         pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
 635             UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 636
 637         pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
 638             L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
 639
 640         for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
 641                 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
 642                     kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
 643                     VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
 644         }
 645
 646         /* Map the vector page. */
 647         pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
 648             VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 649
 650         /* Map the statically mapped devices. */
 651         pmap_devmap_bootstrap(l1pagetable, tsarm_devmap);
 652
 653         /*
 654          * Update the physical_freestart/physical_freeend/free_pages
 655          * variables.
 656          */
 657         {
 658                 extern char _end[];
 659
 660                 physical_freestart = physical_start +
 661                     (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) -
 662                      KERNEL_BASE);
 663                 physical_freeend = physical_end;
 664                 free_pages =
 665                     (physical_freeend - physical_freestart) / PAGE_SIZE;
 666         }
 667
 668         /*
 669          * Now we have the real page tables in place so we can switch to them.
 670          * Once this is done we will be running with the REAL kernel page
 671          * tables.
 672          */
 673
 674         /* Switch tables */
 675 #ifdef VERBOSE_INIT_ARM
 676         printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
 677                physical_freestart, free_pages, free_pages);
 678         printf("switching to new L1 page table  @%#lx...", kernel_l1pt.pv_pa);
 679 #endif
 680         cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
 681         cpu_setttb(kernel_l1pt.pv_pa);
 682         cpu_tlb_flushID();
 683         cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
 684
 685         /*
 686          * Moved from cpu_startup() as data_abort_handler() references
 687          * this during uvm init
 688          */
 689         uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);
 690
 691 #ifdef VERBOSE_INIT_ARM
 692         printf("done!\n");
 693 #endif
 694
 695 #ifdef VERBOSE_INIT_ARM
 696         printf("bootstrap done.\n");
 697 #endif
 698
 699         arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
 700
 701         /*
 702          * Pages were allocated during the secondary bootstrap for the
 703          * stacks for different CPU modes.
 704          * We must now set the r13 registers in the different CPU modes to
 705          * point to these stacks.
 706          * Since the ARM stacks use STMFD etc. we must set r13 to the top end
 707          * of the stack memory.
 708          */
 709 #ifdef VERBOSE_INIT_ARM
 710         printf("init subsystems: stacks ");
 711 #endif
 712
 713         set_stackptr(PSR_IRQ32_MODE,
 714             irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
 715         set_stackptr(PSR_ABT32_MODE,
 716             abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
 717         set_stackptr(PSR_UND32_MODE,
 718             undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
 719
 720         /*
 721          * Well we should set a data abort handler.
 722          * Once things get going this will change as we will need a proper
 723          * handler.
 724          * Until then we will use a handler that just panics but tells us
 725          * why.
 726          * Initialisation of the vectors will just panic on a data abort.
 727          * This just fills in a slightly better one.
 728          */
 729 #ifdef VERBOSE_INIT_ARM
 730         printf("vectors ");
 731 #endif
 732         data_abort_handler_address = (u_int)data_abort_handler;
 733         prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
 734         undefined_handler_address = (u_int)undefinedinstruction_bounce;
 735
 736         /* Initialise the undefined instruction handlers */
 737 #ifdef VERBOSE_INIT_ARM
 738         printf("undefined ");
 739 #endif
 740         undefined_init();
 741
 742         /* Load memory into UVM. */
 743 #ifdef VERBOSE_INIT_ARM
 744         printf("page ");
 745 #endif
 746         uvm_setpagesize();      /* initialize PAGE_SIZE-dependent variables */
 747         uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
 748             atop(physical_freestart), atop(physical_freeend),
 749             VM_FREELIST_DEFAULT);
 750         uvm_page_physload(0, atop(physical_freeend_low),
 751             0, atop(physical_freeend_low),
 752             VM_FREELIST_DEFAULT);
 753         /*
 754          * There is 32 Mb of memory on the TS-7200 in 4 8Mb chunks, so far
 755          * we've only been working with the first one mapped at 0x0.  Tell
 756          * UVM about the others.
 757          */
 758         uvm_page_physload(atop(0x1000000), atop(0x1800000),
 759             atop(0x1000000), atop(0x1800000),
 760             VM_FREELIST_DEFAULT);
 761         uvm_page_physload(atop(0x4000000), atop(0x4800000),
 762             atop(0x4000000), atop(0x4800000),
 763             VM_FREELIST_DEFAULT);
 764         uvm_page_physload(atop(0x5000000), atop(0x5800000),
 765             atop(0x5000000), atop(0x5800000),
 766             VM_FREELIST_DEFAULT);
 767
 768         physmem = 0x2000000 / PAGE_SIZE;
 769
 770
 771         /* Boot strap pmap telling it where the kernel page table is */
 772 #ifdef VERBOSE_INIT_ARM
 773         printf("pmap ");
 774 #endif
 775         pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);
 776
 777         /* Setup the IRQ system */
 778 #ifdef VERBOSE_INIT_ARM
 779         printf("irq ");
 780 #endif
 781         ep93xx_intr_init();
 782 #if NISA > 0
 783         isa_intr_init();
 784
 785 #ifdef VERBOSE_INIT_ARM
 786         printf("isa ");
 787 #endif
 788         isa_tsarm_init(TS7XXX_IO16_VBASE + TS7XXX_ISAIO,
 789                 TS7XXX_IO16_VBASE + TS7XXX_ISAMEM);
 790 #endif
 791
 792 #ifdef VERBOSE_INIT_ARM
 793         printf("done.\n");
 794 #endif
 795
 796 #ifdef BOOTHOWTO
 797         boothowto = BOOTHOWTO;
 798 #endif
 799
 800 #ifdef DDB
 801         db_machine_init();
 802         if (boothowto & RB_KDB)
 803                 Debugger();
 804 #endif
 805
 806         /* We return the new stack pointer address */
 807         return(kernelstack.pv_va + USPACE_SVC_STACK_TOP);
 808 }
 809
 810 void
 811 consinit(void)
 812 {
 813         static int consinit_called;
 814         bus_space_handle_t ioh;
 815
 816         if (consinit_called != 0)
 817                 return;
 818
 819         consinit_called = 1;
 820
 821         /*
 822          * Console devices are already mapped in VA.  Our devmap reflects
 823          * this, so register it now so drivers can map the console
 824          * device.
 825          */
 826         pmap_devmap_register(tsarm_devmap);
 827 #if 0
 828         isa_tsarm_init(TS7XXX_IO16_VBASE + TS7XXX_ISAIO,
 829                 TS7XXX_IO16_VBASE + TS7XXX_ISAMEM);
 830
 831         if (comcnattach(&isa_io_bs_tag, 0x3e8, comcnspeed,
 832             COM_FREQ, COM_TYPE_NORMAL, comcnmode))
 833         {
 834                 panic("can't init serial console");
 835         }
 836 #endif
 837
 838 #if NEPCOM > 0
 839         bus_space_map(&ep93xx_bs_tag, EP93XX_APB_HWBASE + EP93XX_APB_UART1,
 840                 EP93XX_APB_UART_SIZE, 0, &ioh);
 841         if (epcomcnattach(&ep93xx_bs_tag, EP93XX_APB_HWBASE + EP93XX_APB_UART1,
 842                 ioh, comcnspeed, comcnmode))
 843         {
 844                 panic("can't init serial console");
 845         }
 846 #else
 847         panic("serial console not configured");
 848 #endif
 849 #if KGDB
 850 #if NEPCOM > 0
 851         if (strcmp(kgdb_devname, "epcom") == 0) {
 852                 com_kgdb_attach(&ep93xx_bs_tag, kgdb_devaddr, kgdb_devrate,
 853                         kgdb_devmode);
 854         }
 855 #endif  /* NEPCOM > 0 */
 856 #endif  /* KGDB */
 857 }
 858
 859
 860 bus_dma_tag_t
 861 ep93xx_bus_dma_init(struct arm32_bus_dma_tag *dma_tag_template)
 862 {
 863         int i;
 864         struct arm32_bus_dma_tag *dmat;
 865
 866         for (i = 0; i < bootconfig.dramblocks; i++) {
 867                 tsarm_dma_ranges[i].dr_sysbase = bootconfig.dram[i].address;
 868                 tsarm_dma_ranges[i].dr_busbase = bootconfig.dram[i].address;
 869                 tsarm_dma_ranges[i].dr_len = bootconfig.dram[i].pages *
 870                         PAGE_SIZE;
 871         }
 872
 873         dmat = dma_tag_template;
 874
 875         dmat->_ranges = tsarm_dma_ranges;
 876         dmat->_nranges = bootconfig.dramblocks;
 877
 878         return dmat;
 879 }