sys/arch/arm/at91/at91bus.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (c) 2007 Embedtronics Oy
   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 THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  26  * POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include <sys/cdefs.h>
  30 __KERNEL_RCSID(0, "$NetBSD$");
  31
  32 #include "opt_ddb.h"
  33 #include "opt_kgdb.h"
  34 #include "opt_pmap_debug.h"
  35
  36 #include <sys/param.h>
  37 #include <sys/device.h>
  38 #include <sys/systm.h>
  39 #include <sys/kernel.h>
  40 #include <sys/exec.h>
  41 #include <sys/proc.h>
  42 #include <sys/msgbuf.h>
  43 #include <sys/reboot.h>
  44 #include <sys/termios.h>
  45 #include <sys/ksyms.h>
  46
  47 #include <machine/bootconfig.h>
  48 #include <uvm/uvm_extern.h>
  49
  50 #include <dev/cons.h>
  51
  52 #include <machine/db_machdep.h>
  53 #include <ddb/db_sym.h>
  54 #include <ddb/db_extern.h>
  55
  56 #include <machine/bus.h>
  57 #include <machine/cpu.h>
  58 #include <machine/frame.h>
  59 #include <arm/undefined.h>
  60
  61 #include <arm/arm32/machdep.h>
  62 #include <arm/cpufunc.h>
  63
  64 #include <arm/at91/at91var.h>
  65 #include <arm/at91/at91busvar.h>
  66 #include <arm/at91/at91dbgureg.h>
  67
  68 //#include <dev/cons.h>
  69 #include <sys/termios.h>
  70
  71 #include "locators.h"
  72
  73 /* console stuff: */
  74 #ifndef CONSPEED
  75 #define CONSPEED B115200
  76 #endif
  77
  78 #ifndef CONMODE
  79 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
  80 #endif
  81
  82 int cnspeed = CONSPEED;
  83 int cnmode = CONMODE;
  84
  85
  86 /* kernel mapping: */
  87 #define KERNEL_BASE_PHYS        0x20200000
  88 #define KERNEL_TEXT_BASE        (KERNEL_BASE + 0x00200000)
  89 #define KERNEL_VM_BASE          (KERNEL_BASE + 0x01000000)
  90 #define KERNEL_VM_SIZE          0x0C000000
  91
  92
  93
  94 /* Define various stack sizes in pages */
  95 #define IRQ_STACK_SIZE  8
  96 #define ABT_STACK_SIZE  8
  97 #ifdef IPKDB
  98 #define UND_STACK_SIZE  16
  99 #else
 100 #define UND_STACK_SIZE  8
 101 #endif
 102
 103 /* boot configuration: */
 104 vm_offset_t physical_start;
 105 vm_offset_t physical_freestart;
 106 vm_offset_t physical_freeend;
 107 vm_offset_t physical_freeend_low;
 108 vm_offset_t physical_end;
 109 u_int free_pages;
 110
 111 /* Physical and virtual addresses for some global pages */
 112 pv_addr_t irqstack;
 113 pv_addr_t undstack;
 114 pv_addr_t abtstack;
 115 pv_addr_t kernelstack;
 116
 117 vm_offset_t msgbufphys;
 118
 119 //static struct arm32_dma_range dma_ranges[4];
 120
 121 extern u_int data_abort_handler_address;
 122 extern u_int prefetch_abort_handler_address;
 123 extern u_int undefined_handler_address;
 124
 125 #ifdef PMAP_DEBUG
 126 extern int pmap_debug_level;
 127 #endif
 128
 129 #define KERNEL_PT_SYS           0       /* L2 table for mapping vectors page */
 130
 131 #define KERNEL_PT_KERNEL        1       /* L2 table for mapping kernel */
 132 #define KERNEL_PT_KERNEL_NUM    4
 133                                         /* L2 tables for mapping kernel VM */
 134 #define KERNEL_PT_VMDATA        (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM)
 135
 136 #define KERNEL_PT_VMDATA_NUM    4       /* start with 16MB of KVM */
 137 #define NUM_KERNEL_PTS          (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM)
 138
 139 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS];
 140
 141 /* prototypes: */
 142 void            consinit(void);
 143 static int      at91bus_match(device_t, cfdata_t, void *);
 144 static void     at91bus_attach(device_t, device_t, void *);
 145 static int      at91bus_search(device_t, cfdata_t,
 146                                const int *, void *);
 147 static int      at91bus_print(void *, const char *);
 148 static int      at91bus_submatch(device_t, cfdata_t,
 149                                  const int *, void *);
 150
 151
 152 CFATTACH_DECL(at91bus, sizeof(struct at91bus_softc), at91bus_match, at91bus_attach, NULL, NULL);
 153
 154 struct at91bus_clocks at91bus_clocks = {0};
 155 struct at91bus_softc *at91bus_sc = NULL;
 156
 157 #include "opt_at91types.h"
 158
 159 #ifdef  AT91RM9200
 160 #include <arm/at91/at91rm9200busvar.h>
 161 #endif
 162
 163 #ifdef  AT91SAM9261
 164 #include <arm/at91/at91sam9261busvar.h>
 165 #endif
 166
 167 static const struct {
 168         u_int32_t       cidr;
 169         const char *    name;
 170         const struct at91bus_machdep *machdep;
 171 } at91_types[] = {
 172         {
 173                 DBGU_CIDR_AT91RM9200,
 174                 "AT91RM9200"
 175 #ifdef  AT91RM9200
 176                 , &at91rm9200bus
 177 #endif
 178         },
 179         {
 180                 DBGU_CIDR_AT91SAM9260,
 181                 "AT91SAM9260"
 182         },
 183         {
 184                 DBGU_CIDR_AT91SAM9260,
 185                 "AT91SAM9261"
 186 #ifdef  AT91SAM9261
 187                 , &at91sam9261bus
 188 #endif
 189         },
 190         {
 191                 DBGU_CIDR_AT91SAM9260,
 192                 "AT91SAM9263"
 193         },
 194         {
 195                 0,
 196                 0,
 197                 0
 198         }
 199 };
 200
 201 u_int32_t at91_chip_id;
 202 static int at91_chip_ndx = -1;
 203 struct at91bus_machdep at91bus_machdep = { 0 };
 204 at91bus_tag_t at91bus_tag = 0;
 205
 206 static int
 207 match_cid(void)
 208 {
 209         u_int32_t               cidr;
 210         int                     i;
 211
 212         /* get chip id */
 213         cidr = DBGUREG(DBGU_CIDR);
 214         at91_chip_id = cidr;
 215
 216         /* do we know it? */
 217         for (i = 0; at91_types[i].name; i++) {
 218                 if (cidr == at91_types[i].cidr)
 219                         return i;
 220         }
 221
 222         return -1;
 223 }
 224
 225 int
 226 at91bus_init(void)
 227 {
 228         int i = at91_chip_ndx = match_cid();
 229
 230         if (i < 0)
 231                 panic("%s: unknown chip", __FUNCTION__);
 232
 233         if (!at91_types[i].machdep)
 234                 panic("%s: %s is not supported", __FUNCTION__, at91_types[i].name);
 235
 236         memcpy(&at91bus_machdep, at91_types[i].machdep, sizeof(at91bus_machdep));
 237         at91bus_tag = &at91bus_machdep;
 238
 239         return 0;
 240 }
 241
 242 u_int
 243 at91bus_setup(BootConfig *mem)
 244 {
 245         int loop;
 246         int loop1;
 247         u_int l1pagetable;
 248
 249         consinit();
 250
 251 #ifdef  VERBOSE_INIT_ARM
 252         printf("\nNetBSD/AT91 booting ...\n");
 253 #endif
 254
 255         // setup the CPU / MMU / TLB functions:
 256         if (set_cpufuncs())
 257                 panic("%s: cpu not recognized", __FUNCTION__);
 258
 259 #ifdef  VERBOSE_INIT_ARM
 260         printf("%s: configuring system...\n", __FUNCTION__);
 261 #endif
 262
 263         /*
 264          * Setup the variables that define the availability of
 265          * physical memory.
 266          */
 267         physical_start = mem->dram[0].address;
 268         physical_end = mem->dram[0].address + mem->dram[0].pages * PAGE_SIZE;
 269
 270         physical_freestart = mem->dram[0].address + 0x9000ULL;
 271         physical_freeend = KERNEL_BASE_PHYS;
 272         physmem = (physical_end - physical_start) / PAGE_SIZE;
 273
 274 #ifdef  VERBOSE_INIT_ARM
 275         printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem,
 276                physical_start, physical_end - 1);
 277 #endif
 278
 279         free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;
 280
 281 #ifdef  VERBOSE_INIT_ARM
 282         printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n",
 283                physical_freestart, free_pages, free_pages);
 284 #endif
 285         /* Define a macro to simplify memory allocation */
 286 #define valloc_pages(var, np)                           \
 287         alloc_pages((var).pv_pa, (np));                 \
 288         (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;
 289
 290 #define alloc_pages(var, np)                            \
 291         physical_freeend -= ((np) * PAGE_SIZE);         \
 292         if (physical_freeend < physical_freestart)      \
 293                 panic("initarm: out of memory");        \
 294         (var) = physical_freeend;                       \
 295         free_pages -= (np);                             \
 296         memset((char *)(var), 0, ((np) * PAGE_SIZE));
 297
 298         loop1 = 0;
 299         for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
 300                 /* Are we 16KB aligned for an L1 ? */
 301                 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0
 302                     && kernel_l1pt.pv_pa == 0) {
 303                         valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
 304                 } else {
 305                         valloc_pages(kernel_pt_table[loop1],
 306                             L2_TABLE_SIZE / PAGE_SIZE);
 307                         ++loop1;
 308                 }
 309         }
 310
 311         /* This should never be able to happen but better confirm that. */
 312         if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0)
 313                 panic("initarm: Failed to align the kernel page directory");
 314
 315         /*
 316          * Allocate a page for the system vectors page
 317          */
 318         valloc_pages(systempage, 1);
 319         systempage.pv_va = 0x00000000;
 320
 321         /* Allocate stacks for all modes */
 322         valloc_pages(irqstack, IRQ_STACK_SIZE);
 323         valloc_pages(abtstack, ABT_STACK_SIZE);
 324         valloc_pages(undstack, UND_STACK_SIZE);
 325         valloc_pages(kernelstack, UPAGES);
 326
 327 #ifdef VERBOSE_INIT_ARM
 328         printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa,
 329             irqstack.pv_va);
 330         printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa,
 331             abtstack.pv_va);
 332         printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa,
 333             undstack.pv_va);
 334         printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa,
 335             kernelstack.pv_va);
 336 #endif
 337
 338         alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);
 339
 340         /*
 341          * Ok we have allocated physical pages for the primary kernel
 342          * page tables.  Save physical_freeend for when we give whats left
 343          * of memory below 2Mbyte to UVM.
 344          */
 345
 346         physical_freeend_low = physical_freeend;
 347
 348 #ifdef VERBOSE_INIT_ARM
 349         printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa);
 350 #endif
 351
 352         /*
 353          * Now we start construction of the L1 page table
 354          * We start by mapping the L2 page tables into the L1.
 355          * This means that we can replace L1 mappings later on if necessary
 356          */
 357         l1pagetable = kernel_l1pt.pv_pa;
 358
 359         /* Map the L2 pages tables in the L1 page table */
 360         pmap_link_l2pt(l1pagetable, 0x00000000, &kernel_pt_table[KERNEL_PT_SYS]);
 361         for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++)
 362                 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000,
 363                     &kernel_pt_table[KERNEL_PT_KERNEL + loop]);
 364         for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++)
 365                 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
 366                     &kernel_pt_table[KERNEL_PT_VMDATA + loop]);
 367
 368         /* update the top of the kernel VM */
 369         pmap_curmaxkvaddr =
 370             KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);
 371
 372 #ifdef VERBOSE_INIT_ARM
 373         printf("Mapping kernel\n");
 374 #endif
 375
 376         /* Now we fill in the L2 pagetable for the kernel static code/data */
 377         {
 378                 extern char etext[], _end[];
 379                 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE;
 380                 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE;
 381                 u_int logical;
 382
 383                 textsize = (textsize + PGOFSET) & ~PGOFSET;
 384                 totalsize = (totalsize + PGOFSET) & ~PGOFSET;
 385
 386                 logical = KERNEL_BASE_PHYS - mem->dram[0].address;      /* offset of kernel in RAM */
 387                 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
 388                     physical_start + logical, textsize,
 389                     VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 390                 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
 391                     physical_start + logical, totalsize - textsize,
 392                     VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 393         }
 394
 395 #ifdef VERBOSE_INIT_ARM
 396         printf("Constructing L2 page tables\n");
 397 #endif
 398
 399         /* Map the stack pages */
 400         pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
 401             IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 402         pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
 403             ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 404         pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
 405             UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 406         pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
 407             UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 408
 409         pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
 410             L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
 411
 412         for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
 413                 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
 414                     kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
 415                     VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
 416         }
 417
 418         /* Map the vector page. */
 419         pmap_map_entry(l1pagetable, ARM_VECTORS_LOW, systempage.pv_pa,
 420                        VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 421
 422         /* Map the statically mapped devices. */
 423         pmap_devmap_bootstrap(l1pagetable, at91_devmap());
 424
 425         /*
 426          * Update the physical_freestart/physical_freeend/free_pages
 427          * variables.
 428          */
 429         {
 430                 extern char _end[];
 431
 432                 physical_freestart = physical_start +
 433                     (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) -
 434                      KERNEL_BASE);
 435                 physical_freeend = physical_end;
 436                 free_pages =
 437                     (physical_freeend - physical_freestart) / PAGE_SIZE;
 438         }
 439
 440         /*
 441          * Now we have the real page tables in place so we can switch to them.
 442          * Once this is done we will be running with the REAL kernel page
 443          * tables.
 444          */
 445
 446         /* Switch tables */
 447 #ifdef VERBOSE_INIT_ARM
 448         printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
 449                physical_freestart, free_pages, free_pages);
 450         printf("switching to new L1 page table  @%#lx...", kernel_l1pt.pv_pa);
 451 #endif
 452         cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
 453         cpu_setttb(kernel_l1pt.pv_pa);
 454         cpu_tlb_flushID();
 455         cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
 456
 457         /*
 458          * Moved from cpu_startup() as data_abort_handler() references
 459          * this during uvm init
 460          */
 461         uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);
 462
 463 #ifdef VERBOSE_INIT_ARM
 464         printf("done!\n");
 465 #endif
 466
 467 #ifdef VERBOSE_INIT_ARM
 468         printf("bootstrap done.\n");
 469 #endif
 470
 471         /* @@@@ check this out: @@@ */
 472         arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL);
 473
 474         /*
 475          * Pages were allocated during the secondary bootstrap for the
 476          * stacks for different CPU modes.
 477          * We must now set the r13 registers in the different CPU modes to
 478          * point to these stacks.
 479          * Since the ARM stacks use STMFD etc. we must set r13 to the top end
 480          * of the stack memory.
 481          */
 482 #ifdef VERBOSE_INIT_ARM
 483         printf("init subsystems: stacks ");
 484 #endif
 485
 486         set_stackptr(PSR_IRQ32_MODE,
 487             irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
 488         set_stackptr(PSR_ABT32_MODE,
 489             abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
 490         set_stackptr(PSR_UND32_MODE,
 491             undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
 492
 493         /*
 494          * Well we should set a data abort handler.
 495          * Once things get going this will change as we will need a proper
 496          * handler.
 497          * Until then we will use a handler that just panics but tells us
 498          * why.
 499          * Initialisation of the vectors will just panic on a data abort.
 500          * This just fills in a slightly better one.
 501          */
 502 #ifdef VERBOSE_INIT_ARM
 503         printf("vectors ");
 504 #endif
 505         data_abort_handler_address = (u_int)data_abort_handler;
 506         prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
 507         undefined_handler_address = (u_int)undefinedinstruction_bounce;
 508
 509         /* Initialise the undefined instruction handlers */
 510 #ifdef VERBOSE_INIT_ARM
 511         printf("undefined ");
 512 #endif
 513         undefined_init();
 514
 515         /* Load memory into UVM. */
 516 #ifdef VERBOSE_INIT_ARM
 517         printf("page ");
 518 #endif
 519         uvm_setpagesize();      /* initialize PAGE_SIZE-dependent variables */
 520         uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
 521             atop(physical_freestart), atop(physical_freeend),
 522             VM_FREELIST_DEFAULT);
 523         uvm_page_physload(atop(physical_start), atop(physical_freeend_low),
 524             atop(physical_start), atop(physical_freeend_low),
 525             VM_FREELIST_DEFAULT);
 526
 527         /* Boot strap pmap telling it where the kernel page table is */
 528 #ifdef VERBOSE_INIT_ARM
 529         printf("pmap ");
 530 #endif
 531         pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);
 532
 533         /* Setup the IRQ system */
 534 #ifdef VERBOSE_INIT_ARM
 535         printf("irq ");
 536 #endif
 537         at91_intr_init();
 538
 539 #ifdef VERBOSE_INIT_ARM
 540         printf("done.\n");
 541 #endif
 542
 543 #ifdef BOOTHOWTO
 544         boothowto = BOOTHOWTO;
 545 #endif
 546         boothowto = AB_VERBOSE | AB_DEBUG; // @@@@
 547
 548 #ifdef IPKDB
 549         /* Initialise ipkdb */
 550         ipkdb_init();
 551         if (boothowto & RB_KDB)
 552                 ipkdb_connect(0);
 553 #endif
 554
 555 #ifdef DDB
 556         db_machine_init();
 557         if (boothowto & RB_KDB)
 558                 Debugger();
 559 #endif
 560 #if 0
 561         printf("test data abort...\n");
 562         *((volatile uint32_t*)(0x1234567F)) = 0xdeadbeef;
 563 #endif
 564
 565 #ifdef VERBOSE_INIT_ARM
 566         printf("%s: returning new stack pointer 0x%lX\n", __FUNCTION__, (kernelstack.pv_va + USPACE_SVC_STACK_TOP));
 567 #endif
 568
 569         /* We return the new stack pointer address */
 570         return(kernelstack.pv_va + USPACE_SVC_STACK_TOP);
 571 }
 572
 573 static int
 574 at91bus_match(device_t parent, cfdata_t match, void *aux)
 575 {
 576         // we could detect the device here...
 577         if (strcmp(match->cf_name, "at91bus") == 0)
 578                 return 1;
 579         return 0;
 580 }
 581
 582 static device_t
 583 at91bus_found(device_t self, bus_addr_t addr, int pid)
 584 {
 585         int locs[AT91BUSCF_NLOCS];
 586         struct at91bus_attach_args sa;
 587         struct at91bus_softc *sc;
 588
 589         memset(&locs, 0, sizeof(locs));
 590         memset(&sa, 0, sizeof(sa));
 591
 592         locs[AT91BUSCF_ADDR] = addr;
 593         locs[AT91BUSCF_PID]  = pid;
 594
 595         sc = (struct at91bus_softc*) self;
 596         sa.sa_iot = sc->sc_iot;
 597         sa.sa_dmat = sc->sc_dmat;
 598         sa.sa_addr = addr;
 599         sa.sa_size = 1;
 600         sa.sa_pid = pid;
 601
 602         return config_found_sm_loc(self, "at91bus", locs, &sa,
 603                                    at91bus_print, at91bus_submatch);
 604 }
 605
 606 static void
 607 at91bus_attach(device_t parent, device_t self, void *aux)
 608 {
 609         struct at91bus_softc    *sc;
 610
 611         if (at91_chip_ndx < 0)
 612                 panic("%s: at91bus_init() has not been called!", __FUNCTION__);
 613
 614         sc = (struct at91bus_softc*) self;
 615
 616         /* initialize bus space and bus dma things... */
 617         sc->sc_iot = &at91_bs_tag;
 618         sc->sc_dmat = at91_bus_dma_init(&at91_bd_tag);
 619
 620         if (at91bus_sc == NULL)
 621                 at91bus_sc = sc;
 622
 623         printf(": %s, sclk %u.%03u kHz, mclk %u.%03u MHz, pclk %u.%03u MHz, mstclk %u.%03u, plla %u.%03u, pllb %u.%03u MHz\n",
 624                at91_types[at91_chip_ndx].name,
 625                AT91_SCLK / 1000U, AT91_SCLK % 1000U,
 626                AT91_MCLK / 1000000U, (AT91_MCLK / 1000U) % 1000U,
 627                AT91_PCLK / 1000000U, (AT91_PCLK / 1000U) % 1000U,
 628                AT91_MSTCLK / 1000000U, (AT91_MSTCLK / 1000U) % 1000U,
 629                AT91_PLLACLK / 1000000U, (AT91_PLLACLK / 1000U) % 1000U,
 630                AT91_PLLBCLK / 1000000U, (AT91_PLLBCLK / 1000U) % 1000U);
 631
 632         /*
 633          *  Attach devices
 634          */
 635         at91_search_peripherals(self, at91bus_found);
 636
 637
 638         struct at91bus_attach_args sa;
 639         memset(&sa, 0, sizeof(sa));
 640         sa.sa_iot = sc->sc_iot;
 641         sa.sa_dmat = sc->sc_dmat;
 642         config_search_ia(at91bus_search, self, "at91bus", &sa);
 643 }
 644
 645 int
 646 at91bus_submatch(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
 647 {
 648         struct at91bus_attach_args *sa = aux;
 649
 650         if (cf->cf_loc[AT91BUSCF_ADDR] == ldesc[AT91BUSCF_ADDR]
 651             && cf->cf_loc[AT91BUSCF_PID] == ldesc[AT91BUSCF_PID]) {
 652                 sa->sa_addr = cf->cf_loc[AT91BUSCF_ADDR];
 653                 sa->sa_size = cf->cf_loc[AT91BUSCF_SIZE];
 654                 sa->sa_pid  = cf->cf_loc[AT91BUSCF_PID];
 655                 return (config_match(parent, cf, aux));
 656         } else
 657                 return (0);
 658 }
 659
 660 int
 661 at91bus_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
 662 {
 663         struct at91bus_attach_args *sa = aux;
 664
 665         sa->sa_addr = cf->cf_loc[AT91BUSCF_ADDR];
 666         sa->sa_size = cf->cf_loc[AT91BUSCF_SIZE];
 667         sa->sa_pid  = cf->cf_loc[AT91BUSCF_PID];
 668
 669         if (config_match(parent, cf, aux) > 0)
 670                 config_attach(parent, cf, aux, at91bus_print);
 671
 672         return (0);
 673 }
 674
 675 static int
 676 at91bus_print(void *aux, const char *name)
 677 {
 678         struct at91bus_attach_args *sa = (struct at91bus_attach_args*)aux;
 679
 680         if (name)
 681                 aprint_normal("%s at %s", sa->sa_pid >= 0 ? at91_peripheral_name(sa->sa_pid) : "device", name);
 682
 683         if (sa->sa_size)
 684                 aprint_normal(" at addr 0x%lx", sa->sa_addr);
 685         if (sa->sa_size > 1)
 686                 aprint_normal("-0x%lx", sa->sa_addr + sa->sa_size - 1);
 687         if (sa->sa_pid >= 0)
 688                 aprint_normal(" pid %d", sa->sa_pid);
 689
 690         return (UNCONF);
 691 }
 692
 693 void    consinit(void)
 694 {
 695         static int consinit_called;
 696
 697         if (consinit_called != 0)
 698                 return;
 699
 700         consinit_called = 1;
 701
 702         if (at91_chip_ndx < 0)
 703                 panic("%s: at91_init() has not been called!", __FUNCTION__);
 704
 705         // call machine specific bus initialization code
 706         (*at91bus_tag->init)(&at91bus_clocks);
 707
 708         // attach console
 709         (*at91bus_tag->attach_cn)(&at91_bs_tag, cnspeed, cnmode);
 710 }