at91bus.c revision 1.12
1 /* $NetBSD: at91bus.c,v 1.12 2011/11/04 17:20:54 aymeric Exp $ */ 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: at91bus.c,v 1.12 2011/11/04 17:20:54 aymeric Exp $"); 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 <sys/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_NEW(at91bus, sizeof(struct at91bus_softc), 153 at91bus_match, at91bus_attach, NULL, NULL); 154 155 struct at91bus_clocks at91bus_clocks = {0}; 156 struct at91bus_softc *at91bus_sc = NULL; 157 158 #include "opt_at91types.h" 159 160 #ifdef AT91RM9200 161 #include <arm/at91/at91rm9200busvar.h> 162 #endif 163 164 #ifdef AT91SAM9260 165 #include <arm/at91/at91sam9260busvar.h> 166 #endif 167 168 #ifdef AT91SAM9261 169 #include <arm/at91/at91sam9261busvar.h> 170 #endif 171 172 static const struct { 173 u_int32_t cidr; 174 const char * name; 175 const struct at91bus_machdep *machdep; 176 } at91_types[] = { 177 { 178 DBGU_CIDR_AT91RM9200, 179 "AT91RM9200" 180 #ifdef AT91RM9200 181 , &at91rm9200bus 182 #endif 183 }, 184 { 185 DBGU_CIDR_AT91SAM9260, 186 "AT91SAM9260" 187 #ifdef AT91SAM9260 188 , &at91sam9260bus 189 #endif 190 }, 191 { 192 DBGU_CIDR_AT91SAM9260, 193 "AT91SAM9261" 194 #ifdef AT91SAM9261 195 , &at91sam9261bus 196 #endif 197 }, 198 { 199 DBGU_CIDR_AT91SAM9263, 200 "AT91SAM9263" 201 }, 202 { 203 0, 204 0, 205 0 206 } 207 }; 208 209 u_int32_t at91_chip_id; 210 static int at91_chip_ndx = -1; 211 struct at91bus_machdep at91bus_machdep = { 0 }; 212 at91bus_tag_t at91bus_tag = 0; 213 214 static int 215 match_cid(void) 216 { 217 u_int32_t cidr; 218 int i; 219 220 /* get chip id */ 221 cidr = DBGUREG(DBGU_CIDR); 222 at91_chip_id = cidr; 223 224 /* do we know it? */ 225 for (i = 0; at91_types[i].name; i++) { 226 if (cidr == at91_types[i].cidr) 227 return i; 228 } 229 230 return -1; 231 } 232 233 int 234 at91bus_init(void) 235 { 236 int i = at91_chip_ndx = match_cid(); 237 238 if (i < 0) 239 panic("%s: unknown chip", __FUNCTION__); 240 241 if (!at91_types[i].machdep) 242 panic("%s: %s is not supported", __FUNCTION__, at91_types[i].name); 243 244 memcpy(&at91bus_machdep, at91_types[i].machdep, sizeof(at91bus_machdep)); 245 at91bus_tag = &at91bus_machdep; 246 247 return 0; 248 } 249 250 u_int 251 at91bus_setup(BootConfig *mem) 252 { 253 int loop; 254 int loop1; 255 u_int l1pagetable; 256 257 consinit(); 258 259 #ifdef VERBOSE_INIT_ARM 260 printf("\nNetBSD/AT91 booting ...\n"); 261 #endif 262 263 // setup the CPU / MMU / TLB functions: 264 if (set_cpufuncs()) 265 panic("%s: cpu not recognized", __FUNCTION__); 266 267 #ifdef VERBOSE_INIT_ARM 268 printf("%s: configuring system...\n", __FUNCTION__); 269 #endif 270 271 /* 272 * Setup the variables that define the availability of 273 * physical memory. 274 */ 275 physical_start = mem->dram[0].address; 276 physical_end = mem->dram[0].address + mem->dram[0].pages * PAGE_SIZE; 277 278 physical_freestart = mem->dram[0].address + 0x9000ULL; 279 physical_freeend = KERNEL_BASE_PHYS; 280 physmem = (physical_end - physical_start) / PAGE_SIZE; 281 282 #ifdef VERBOSE_INIT_ARM 283 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 284 physical_start, physical_end - 1); 285 #endif 286 287 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 288 289 #ifdef VERBOSE_INIT_ARM 290 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 291 physical_freestart, free_pages, free_pages); 292 #endif 293 /* Define a macro to simplify memory allocation */ 294 #define valloc_pages(var, np) \ 295 alloc_pages((var).pv_pa, (np)); \ 296 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 297 298 #define alloc_pages(var, np) \ 299 physical_freeend -= ((np) * PAGE_SIZE); \ 300 if (physical_freeend < physical_freestart) \ 301 panic("initarm: out of memory"); \ 302 (var) = physical_freeend; \ 303 free_pages -= (np); \ 304 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 305 306 loop1 = 0; 307 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 308 /* Are we 16KB aligned for an L1 ? */ 309 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 310 && kernel_l1pt.pv_pa == 0) { 311 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 312 } else { 313 valloc_pages(kernel_pt_table[loop1], 314 L2_TABLE_SIZE / PAGE_SIZE); 315 ++loop1; 316 } 317 } 318 319 /* This should never be able to happen but better confirm that. */ 320 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 321 panic("initarm: Failed to align the kernel page directory"); 322 323 /* 324 * Allocate a page for the system vectors page 325 */ 326 valloc_pages(systempage, 1); 327 systempage.pv_va = 0x00000000; 328 329 /* Allocate stacks for all modes */ 330 valloc_pages(irqstack, IRQ_STACK_SIZE); 331 valloc_pages(abtstack, ABT_STACK_SIZE); 332 valloc_pages(undstack, UND_STACK_SIZE); 333 valloc_pages(kernelstack, UPAGES); 334 335 #ifdef VERBOSE_INIT_ARM 336 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 337 irqstack.pv_va); 338 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 339 abtstack.pv_va); 340 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 341 undstack.pv_va); 342 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 343 kernelstack.pv_va); 344 #endif 345 346 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 347 348 /* 349 * Ok we have allocated physical pages for the primary kernel 350 * page tables. Save physical_freeend for when we give whats left 351 * of memory below 2Mbyte to UVM. 352 */ 353 354 physical_freeend_low = physical_freeend; 355 356 #ifdef VERBOSE_INIT_ARM 357 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 358 #endif 359 360 /* 361 * Now we start construction of the L1 page table 362 * We start by mapping the L2 page tables into the L1. 363 * This means that we can replace L1 mappings later on if necessary 364 */ 365 l1pagetable = kernel_l1pt.pv_pa; 366 367 /* Map the L2 pages tables in the L1 page table */ 368 pmap_link_l2pt(l1pagetable, 0x00000000, &kernel_pt_table[KERNEL_PT_SYS]); 369 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 370 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 371 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 372 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 373 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 374 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 375 376 /* update the top of the kernel VM */ 377 pmap_curmaxkvaddr = 378 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 379 380 #ifdef VERBOSE_INIT_ARM 381 printf("Mapping kernel\n"); 382 #endif 383 384 /* Now we fill in the L2 pagetable for the kernel static code/data */ 385 { 386 extern char etext[], _end[]; 387 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 388 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 389 u_int logical; 390 391 textsize = (textsize + PGOFSET) & ~PGOFSET; 392 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 393 394 logical = KERNEL_BASE_PHYS - mem->dram[0].address; /* offset of kernel in RAM */ 395 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 396 physical_start + logical, textsize, 397 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 398 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 399 physical_start + logical, totalsize - textsize, 400 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 401 } 402 403 #ifdef VERBOSE_INIT_ARM 404 printf("Constructing L2 page tables\n"); 405 #endif 406 407 /* Map the stack pages */ 408 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 409 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 410 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 411 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 412 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 413 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 414 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 415 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 416 417 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 418 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 419 420 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 421 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 422 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 423 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 424 } 425 426 /* Map the vector page. */ 427 pmap_map_entry(l1pagetable, ARM_VECTORS_LOW, systempage.pv_pa, 428 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 429 430 /* Map the statically mapped devices. */ 431 pmap_devmap_bootstrap(l1pagetable, at91_devmap()); 432 433 /* 434 * Update the physical_freestart/physical_freeend/free_pages 435 * variables. 436 */ 437 { 438 extern char _end[]; 439 440 physical_freestart = physical_start + 441 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 442 KERNEL_BASE); 443 physical_freeend = physical_end; 444 free_pages = 445 (physical_freeend - physical_freestart) / PAGE_SIZE; 446 } 447 448 /* 449 * Now we have the real page tables in place so we can switch to them. 450 * Once this is done we will be running with the REAL kernel page 451 * tables. 452 */ 453 454 /* Switch tables */ 455 #ifdef VERBOSE_INIT_ARM 456 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 457 physical_freestart, free_pages, free_pages); 458 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 459 #endif 460 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 461 cpu_setttb(kernel_l1pt.pv_pa); 462 cpu_tlb_flushID(); 463 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 464 465 /* 466 * Moved from cpu_startup() as data_abort_handler() references 467 * this during uvm init 468 */ 469 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 470 471 #ifdef VERBOSE_INIT_ARM 472 printf("done!\n"); 473 #endif 474 475 #ifdef VERBOSE_INIT_ARM 476 printf("bootstrap done.\n"); 477 #endif 478 479 /* @@@@ check this out: @@@ */ 480 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 481 482 /* 483 * Pages were allocated during the secondary bootstrap for the 484 * stacks for different CPU modes. 485 * We must now set the r13 registers in the different CPU modes to 486 * point to these stacks. 487 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 488 * of the stack memory. 489 */ 490 #ifdef VERBOSE_INIT_ARM 491 printf("init subsystems: stacks "); 492 #endif 493 494 set_stackptr(PSR_IRQ32_MODE, 495 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 496 set_stackptr(PSR_ABT32_MODE, 497 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 498 set_stackptr(PSR_UND32_MODE, 499 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 500 501 /* 502 * Well we should set a data abort handler. 503 * Once things get going this will change as we will need a proper 504 * handler. 505 * Until then we will use a handler that just panics but tells us 506 * why. 507 * Initialisation of the vectors will just panic on a data abort. 508 * This just fills in a slightly better one. 509 */ 510 #ifdef VERBOSE_INIT_ARM 511 printf("vectors "); 512 #endif 513 data_abort_handler_address = (u_int)data_abort_handler; 514 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 515 undefined_handler_address = (u_int)undefinedinstruction_bounce; 516 517 /* Initialise the undefined instruction handlers */ 518 #ifdef VERBOSE_INIT_ARM 519 printf("undefined "); 520 #endif 521 undefined_init(); 522 523 /* Load memory into UVM. */ 524 #ifdef VERBOSE_INIT_ARM 525 printf("page "); 526 #endif 527 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 528 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 529 atop(physical_freestart), atop(physical_freeend), 530 VM_FREELIST_DEFAULT); 531 uvm_page_physload(atop(physical_start), atop(physical_freeend_low), 532 atop(physical_start), atop(physical_freeend_low), 533 VM_FREELIST_DEFAULT); 534 535 /* Boot strap pmap telling it where the kernel page table is */ 536 #ifdef VERBOSE_INIT_ARM 537 printf("pmap "); 538 #endif 539 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 540 541 /* Setup the IRQ system */ 542 #ifdef VERBOSE_INIT_ARM 543 printf("irq "); 544 #endif 545 at91_intr_init(); 546 547 #ifdef VERBOSE_INIT_ARM 548 printf("done.\n"); 549 #endif 550 551 #ifdef BOOTHOWTO 552 boothowto = BOOTHOWTO; 553 #endif 554 boothowto = AB_VERBOSE | AB_DEBUG; // @@@@ 555 556 #ifdef IPKDB 557 /* Initialise ipkdb */ 558 ipkdb_init(); 559 if (boothowto & RB_KDB) 560 ipkdb_connect(0); 561 #endif 562 563 #ifdef DDB 564 db_machine_init(); 565 if (boothowto & RB_KDB) 566 Debugger(); 567 #endif 568 #if 0 569 printf("test data abort...\n"); 570 *((volatile uint32_t*)(0x1234567F)) = 0xdeadbeef; 571 #endif 572 573 #ifdef VERBOSE_INIT_ARM 574 printf("%s: returning new stack pointer 0x%lX\n", __FUNCTION__, (kernelstack.pv_va + USPACE_SVC_STACK_TOP)); 575 #endif 576 577 /* We return the new stack pointer address */ 578 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 579 } 580 581 static int 582 at91bus_match(device_t parent, cfdata_t match, void *aux) 583 { 584 // we could detect the device here... 585 if (strcmp(match->cf_name, "at91bus") == 0) 586 return 1; 587 return 0; 588 } 589 590 static device_t 591 at91bus_found(device_t self, bus_addr_t addr, int pid) 592 { 593 int locs[AT91BUSCF_NLOCS]; 594 struct at91bus_attach_args sa; 595 struct at91bus_softc *sc; 596 597 memset(&locs, 0, sizeof(locs)); 598 memset(&sa, 0, sizeof(sa)); 599 600 locs[AT91BUSCF_ADDR] = addr; 601 locs[AT91BUSCF_PID] = pid; 602 603 sc = device_private(self); 604 sa.sa_iot = sc->sc_iot; 605 sa.sa_dmat = sc->sc_dmat; 606 sa.sa_addr = addr; 607 sa.sa_size = 1; 608 sa.sa_pid = pid; 609 610 return config_found_sm_loc(self, "at91bus", locs, &sa, 611 at91bus_print, at91bus_submatch); 612 } 613 614 static void 615 at91bus_attach(device_t parent, device_t self, void *aux) 616 { 617 struct at91bus_softc *sc; 618 619 if (at91_chip_ndx < 0) 620 panic("%s: at91bus_init() has not been called!", __FUNCTION__); 621 622 sc = device_private(self); 623 624 /* initialize bus space and bus dma things... */ 625 sc->sc_iot = &at91_bs_tag; 626 sc->sc_dmat = at91_bus_dma_init(&at91_bd_tag); 627 628 if (at91bus_sc == NULL) 629 at91bus_sc = sc; 630 631 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", 632 at91_types[at91_chip_ndx].name, 633 AT91_SCLK / 1000U, AT91_SCLK % 1000U, 634 AT91_MCLK / 1000000U, (AT91_MCLK / 1000U) % 1000U, 635 AT91_PCLK / 1000000U, (AT91_PCLK / 1000U) % 1000U, 636 AT91_MSTCLK / 1000000U, (AT91_MSTCLK / 1000U) % 1000U, 637 AT91_PLLACLK / 1000000U, (AT91_PLLACLK / 1000U) % 1000U, 638 AT91_PLLBCLK / 1000000U, (AT91_PLLBCLK / 1000U) % 1000U); 639 640 /* 641 * Attach devices 642 */ 643 at91_search_peripherals(self, at91bus_found); 644 645 646 struct at91bus_attach_args sa; 647 memset(&sa, 0, sizeof(sa)); 648 sa.sa_iot = sc->sc_iot; 649 sa.sa_dmat = sc->sc_dmat; 650 config_search_ia(at91bus_search, self, "at91bus", &sa); 651 } 652 653 int 654 at91bus_submatch(device_t parent, cfdata_t cf, const int *ldesc, void *aux) 655 { 656 struct at91bus_attach_args *sa = aux; 657 658 if (cf->cf_loc[AT91BUSCF_ADDR] == ldesc[AT91BUSCF_ADDR] 659 && cf->cf_loc[AT91BUSCF_PID] == ldesc[AT91BUSCF_PID]) { 660 sa->sa_addr = cf->cf_loc[AT91BUSCF_ADDR]; 661 sa->sa_size = cf->cf_loc[AT91BUSCF_SIZE]; 662 sa->sa_pid = cf->cf_loc[AT91BUSCF_PID]; 663 return (config_match(parent, cf, aux)); 664 } else 665 return (0); 666 } 667 668 int 669 at91bus_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux) 670 { 671 struct at91bus_attach_args *sa = aux; 672 673 sa->sa_addr = cf->cf_loc[AT91BUSCF_ADDR]; 674 sa->sa_size = cf->cf_loc[AT91BUSCF_SIZE]; 675 sa->sa_pid = cf->cf_loc[AT91BUSCF_PID]; 676 677 if (config_match(parent, cf, aux) > 0) 678 config_attach(parent, cf, aux, at91bus_print); 679 680 return (0); 681 } 682 683 static int 684 at91bus_print(void *aux, const char *name) 685 { 686 struct at91bus_attach_args *sa = (struct at91bus_attach_args*)aux; 687 688 if (name) 689 aprint_normal("%s at %s", sa->sa_pid >= 0 ? at91_peripheral_name(sa->sa_pid) : "device", name); 690 691 if (sa->sa_size) 692 aprint_normal(" at addr 0x%lx", sa->sa_addr); 693 if (sa->sa_size > 1) 694 aprint_normal("-0x%lx", sa->sa_addr + sa->sa_size - 1); 695 if (sa->sa_pid >= 0) 696 aprint_normal(" pid %d", sa->sa_pid); 697 698 return (UNCONF); 699 } 700 701 void consinit(void) 702 { 703 static int consinit_called; 704 705 if (consinit_called != 0) 706 return; 707 708 consinit_called = 1; 709 710 if (at91_chip_ndx < 0) 711 panic("%s: at91_init() has not been called!", __FUNCTION__); 712 713 // call machine specific bus initialization code 714 (*at91bus_tag->init)(&at91bus_clocks); 715 716 // attach console 717 (*at91bus_tag->attach_cn)(&at91_bs_tag, cnspeed, cnmode); 718 } 719
Indexes created Fri Sep 26 08:10:20 GMT 2025