1 /* $NetBSD: at91bus.c,v 1.30 2024/02/20 23:36:01 andvar 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 1.30 2024/02/20 23:36:01 andvar Exp $");
31
32 #include "opt_arm_debug.h"
33 #include "opt_console.h"
34 #include "opt_ddb.h"
35 #include "opt_kgdb.h"
36 #include "locators.h"
37
38 /* Define various stack sizes in pages */
39 #define IRQ_STACK_SIZE 8
40 #define ABT_STACK_SIZE 8
41 #define UND_STACK_SIZE 8
42
43 #include <sys/param.h>
44 #include <sys/device.h>
45 #include <sys/systm.h>
46 #include <sys/kernel.h>
47 #include <sys/exec.h>
48 #include <sys/proc.h>
49 #include <sys/msgbuf.h>
50 #include <sys/reboot.h>
51 #include <sys/termios.h>
52 #include <sys/ksyms.h>
53 #include <sys/bus.h>
54 #include <sys/cpu.h>
55 #include <sys/termios.h>
56
57 #include <uvm/uvm_extern.h>
58
59 #include <dev/cons.h>
60
61 #include <machine/db_machdep.h>
62 #include <ddb/db_sym.h>
63 #include <ddb/db_extern.h>
64
65 #include <arm/locore.h>
66 #include <arm/undefined.h>
67
68 #include <arm/arm32/machdep.h>
69
70 #include <arm/at91/at91var.h>
71 #include <arm/at91/at91busvar.h>
72 #include <arm/at91/at91dbgureg.h>
73
74 #include <machine/bootconfig.h>
75
76 /* console stuff: */
77 #ifndef CONSPEED
78 #define CONSPEED B115200
79 #endif
80
81 #ifndef CONMODE
82 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
83 #endif
84
85 int cnspeed = CONSPEED;
86 int cnmode = CONMODE;
87
88
89 /* kernel mapping: */
90 #define KERNEL_BASE_PHYS 0x20200000
91 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000)
92 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000)
93 #define KERNEL_VM_SIZE 0x0C000000
94
95
96
97 /* boot configuration: */
98 vaddr_t physical_start;
99 vaddr_t physical_freestart;
100 vaddr_t physical_freeend;
101 vaddr_t physical_freeend_low;
102 vaddr_t physical_end;
103 u_int free_pages;
104
105 paddr_t msgbufphys;
106
107 //static struct arm32_dma_range dma_ranges[4];
108
109 #define KERNEL_PT_SYS 0 /* L2 table for mapping vectors page */
110
111 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */
112 #define KERNEL_PT_KERNEL_NUM 4
113 /* L2 tables for mapping kernel VM */
114 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM)
115
116 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */
117 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM)
118
119 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS];
120
121 /* prototypes: */
122 void consinit(void);
123 static int at91bus_match(device_t, cfdata_t, void *);
124 static void at91bus_attach(device_t, device_t, void *);
125 static int at91bus_search(device_t, cfdata_t,
126 const int *, void *);
127 static int at91bus_print(void *, const char *);
128 static int at91bus_submatch(device_t, cfdata_t,
129 const int *, void *);
130
131
132 CFATTACH_DECL_NEW(at91bus, sizeof(struct at91bus_softc),
133 at91bus_match, at91bus_attach, NULL, NULL);
134
135 struct at91bus_clocks at91bus_clocks = {0};
136 struct at91bus_softc *at91bus_sc = NULL;
137
138 #include "opt_at91types.h"
139
140 #ifdef AT91RM9200
141 #include <arm/at91/at91rm9200busvar.h>
142 #endif
143
144 #ifdef AT91SAM9260
145 #include <arm/at91/at91sam9260busvar.h>
146 #endif
147
148 #ifdef AT91SAM9261
149 #include <arm/at91/at91sam9261busvar.h>
150 #endif
151
152 static const struct {
153 uint32_t cidr;
154 const char * name;
155 const struct at91bus_machdep *machdep;
156 } at91_types[] = {
157 {
158 DBGU_CIDR_AT91RM9200,
159 "AT91RM9200"
160 #ifdef AT91RM9200
161 , &at91rm9200bus
162 #endif
163 },
164 {
165 DBGU_CIDR_AT91SAM9260,
166 "AT91SAM9260"
167 #ifdef AT91SAM9260
168 , &at91sam9260bus
169 #endif
170 },
171 {
172 DBGU_CIDR_AT91SAM9260,
173 "AT91SAM9261"
174 #ifdef AT91SAM9261
175 , &at91sam9261bus
176 #endif
177 },
178 {
179 DBGU_CIDR_AT91SAM9263,
180 "AT91SAM9263"
181 },
182 {
183 0,
184 0,
185 0
186 }
187 };
188
189 uint32_t at91_chip_id;
190 static int at91_chip_ndx = -1;
191 struct at91bus_machdep at91bus_machdep = { 0 };
192 at91bus_tag_t at91bus_tag = 0;
193
194 static int
match_cid(void)195 match_cid(void)
196 {
197 uint32_t cidr;
198 int i;
199
200 /* get chip id */
201 cidr = DBGUREG(DBGU_CIDR);
202 at91_chip_id = cidr;
203
204 /* do we know it? */
205 for (i = 0; at91_types[i].name; i++) {
206 if (cidr == at91_types[i].cidr)
207 return i;
208 }
209
210 return -1;
211 }
212
213 int
at91bus_init(void)214 at91bus_init(void)
215 {
216 int i = at91_chip_ndx = match_cid();
217
218 if (i < 0)
219 panic("%s: unknown chip", __FUNCTION__);
220
221 if (!at91_types[i].machdep)
222 panic("%s: %s is not supported", __FUNCTION__, at91_types[i].name);
223
224 memcpy(&at91bus_machdep, at91_types[i].machdep, sizeof(at91bus_machdep));
225 at91bus_tag = &at91bus_machdep;
226
227 return 0;
228 }
229
230 vaddr_t
at91bus_setup(BootConfig * mem)231 at91bus_setup(BootConfig *mem)
232 {
233 int loop;
234 int loop1;
235 u_int l1pagetable;
236
237 consinit();
238
239 #ifdef VERBOSE_INIT_ARM
240 printf("\nNetBSD/AT91 booting ...\n");
241 #endif
242
243 // setup the CPU / MMU / TLB functions:
244 if (set_cpufuncs())
245 panic("%s: cpu not recognized", __FUNCTION__);
246
247 #ifdef VERBOSE_INIT_ARM
248 printf("%s: configuring system...\n", __FUNCTION__);
249 #endif
250
251 /*
252 * Setup the variables that define the availability of
253 * physical memory.
254 */
255 physical_start = mem->dram[0].address;
256 physical_end = mem->dram[0].address + mem->dram[0].pages * PAGE_SIZE;
257
258 physical_freestart = mem->dram[0].address + 0x9000ULL;
259 physical_freeend = KERNEL_BASE_PHYS;
260 physmem = (physical_end - physical_start) / PAGE_SIZE;
261
262 #ifdef VERBOSE_INIT_ARM
263 printf("physmemory: 0x%"PRIxPSIZE" pages at 0x%08lx -> 0x%08lx\n", physmem,
264 physical_start, physical_end - 1);
265 #endif
266
267 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;
268
269 #ifdef VERBOSE_INIT_ARM
270 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n",
271 physical_freestart, free_pages, free_pages);
272 #endif
273 /* Define a macro to simplify memory allocation */
274 #define valloc_pages(var, np) \
275 alloc_pages((var).pv_pa, (np)); \
276 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;
277
278 #define alloc_pages(var, np) \
279 physical_freeend -= ((np) * PAGE_SIZE); \
280 if (physical_freeend < physical_freestart) \
281 panic("initarm: out of memory"); \
282 (var) = physical_freeend; \
283 free_pages -= (np); \
284 memset((char *)(var), 0, ((np) * PAGE_SIZE));
285
286 loop1 = 0;
287 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
288 /* Are we 16KB aligned for an L1 ? */
289 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0
290 && kernel_l1pt.pv_pa == 0) {
291 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
292 } else {
293 valloc_pages(kernel_pt_table[loop1],
294 L2_TABLE_SIZE / PAGE_SIZE);
295 ++loop1;
296 }
297 }
298
299 /* This should never be able to happen but better confirm that. */
300 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0)
301 panic("initarm: Failed to align the kernel page directory");
302
303 /*
304 * Allocate a page for the system vectors page
305 */
306 valloc_pages(systempage, 1);
307 systempage.pv_va = 0x00000000;
308
309 /* Allocate stacks for all modes */
310 valloc_pages(irqstack, IRQ_STACK_SIZE);
311 valloc_pages(abtstack, ABT_STACK_SIZE);
312 valloc_pages(undstack, UND_STACK_SIZE);
313 valloc_pages(kernelstack, UPAGES);
314
315 #ifdef VERBOSE_INIT_ARM
316 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa,
317 irqstack.pv_va);
318 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa,
319 abtstack.pv_va);
320 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa,
321 undstack.pv_va);
322 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa,
323 kernelstack.pv_va);
324 #endif
325
326 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);
327
328 /*
329 * Ok we have allocated physical pages for the primary kernel
330 * page tables. Save physical_freeend for when we give whats left
331 * of memory below 2Mbyte to UVM.
332 */
333
334 physical_freeend_low = physical_freeend;
335
336 #ifdef VERBOSE_INIT_ARM
337 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa);
338 #endif
339
340 /*
341 * Now we start construction of the L1 page table
342 * We start by mapping the L2 page tables into the L1.
343 * This means that we can replace L1 mappings later on if necessary
344 */
345 l1pagetable = kernel_l1pt.pv_pa;
346
347 /* Map the L2 pages tables in the L1 page table */
348 pmap_link_l2pt(l1pagetable, 0x00000000, &kernel_pt_table[KERNEL_PT_SYS]);
349 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++)
350 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000,
351 &kernel_pt_table[KERNEL_PT_KERNEL + loop]);
352 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++)
353 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
354 &kernel_pt_table[KERNEL_PT_VMDATA + loop]);
355
356 /* update the top of the kernel VM */
357 pmap_curmaxkvaddr =
358 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);
359
360 #ifdef VERBOSE_INIT_ARM
361 printf("Mapping kernel\n");
362 #endif
363
364 /* Now we fill in the L2 pagetable for the kernel static code/data */
365 {
366 extern char etext[], _end[];
367 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE;
368 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE;
369 u_int logical;
370
371 textsize = (textsize + PGOFSET) & ~PGOFSET;
372 totalsize = (totalsize + PGOFSET) & ~PGOFSET;
373
374 logical = KERNEL_BASE_PHYS - mem->dram[0].address; /* offset of kernel in RAM */
375 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
376 physical_start + logical, textsize,
377 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
378 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
379 physical_start + logical, totalsize - textsize,
380 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
381 }
382
383 #ifdef VERBOSE_INIT_ARM
384 printf("Constructing L2 page tables\n");
385 #endif
386
387 /* Map the stack pages */
388 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
389 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
390 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
391 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
392 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
393 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
394 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
395 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
396
397 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
398 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
399
400 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
401 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
402 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
403 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
404 }
405
406 /* Map the vector page. */
407 pmap_map_entry(l1pagetable, ARM_VECTORS_LOW, systempage.pv_pa,
408 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
409
410 /* Map the statically mapped devices. */
411 pmap_devmap_bootstrap(l1pagetable, at91_devmap());
412
413 /*
414 * Update the physical_freestart/physical_freeend/free_pages
415 * variables.
416 */
417 {
418 extern char _end[];
419
420 physical_freestart = physical_start +
421 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) -
422 KERNEL_BASE);
423 physical_freeend = physical_end;
424 free_pages =
425 (physical_freeend - physical_freestart) / PAGE_SIZE;
426 }
427
428 /*
429 * Now we have the real page tables in place so we can switch to them.
430 * Once this is done we will be running with the REAL kernel page
431 * tables.
432 */
433
434 /* Switch tables */
435 #ifdef VERBOSE_INIT_ARM
436 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
437 physical_freestart, free_pages, free_pages);
438 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa);
439 #endif
440 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
441 cpu_setttb(kernel_l1pt.pv_pa, true);
442 cpu_tlb_flushID();
443 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
444
445 /*
446 * Moved from cpu_startup() as data_abort_handler() references
447 * this during uvm init
448 */
449 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);
450
451 #ifdef VERBOSE_INIT_ARM
452 printf("done!\n");
453 #endif
454
455 #ifdef VERBOSE_INIT_ARM
456 printf("bootstrap done.\n");
457 #endif
458
459 /* @@@@ check this out: @@@ */
460 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL);
461
462 /*
463 * Pages were allocated during the secondary bootstrap for the
464 * stacks for different CPU modes.
465 * We must now set the r13 registers in the different CPU modes to
466 * point to these stacks.
467 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
468 * of the stack memory.
469 */
470 #ifdef VERBOSE_INIT_ARM
471 printf("init subsystems: stacks ");
472 #endif
473
474 set_stackptr(PSR_IRQ32_MODE,
475 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
476 set_stackptr(PSR_ABT32_MODE,
477 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
478 set_stackptr(PSR_UND32_MODE,
479 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
480
481 /*
482 * Well we should set a data abort handler.
483 * Once things get going this will change as we will need a proper
484 * handler.
485 * Until then we will use a handler that just panics but tells us
486 * why.
487 * Initialisation of the vectors will just panic on a data abort.
488 * This just fills in a slightly better one.
489 */
490 #ifdef VERBOSE_INIT_ARM
491 printf("vectors ");
492 #endif
493 data_abort_handler_address = (u_int)data_abort_handler;
494 prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
495 undefined_handler_address = (u_int)undefinedinstruction_bounce;
496
497 /* Initialise the undefined instruction handlers */
498 #ifdef VERBOSE_INIT_ARM
499 printf("undefined ");
500 #endif
501 undefined_init();
502
503 /* Load memory into UVM. */
504 #ifdef VERBOSE_INIT_ARM
505 printf("page ");
506 #endif
507 uvm_md_init();
508 uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
509 atop(physical_freestart), atop(physical_freeend),
510 VM_FREELIST_DEFAULT);
511 uvm_page_physload(atop(physical_start), atop(physical_freeend_low),
512 atop(physical_start), atop(physical_freeend_low),
513 VM_FREELIST_DEFAULT);
514
515 /* Boot strap pmap telling it where managed kernel virtual memory is */
516 #ifdef VERBOSE_INIT_ARM
517 printf("pmap ");
518 #endif
519 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);
520
521 /* Setup the IRQ system */
522 #ifdef VERBOSE_INIT_ARM
523 printf("irq ");
524 #endif
525 at91_intr_init();
526
527 #ifdef VERBOSE_INIT_ARM
528 printf("done.\n");
529 #endif
530
531 #ifdef BOOTHOWTO
532 boothowto = BOOTHOWTO;
533 #endif
534 boothowto = AB_VERBOSE | AB_DEBUG; // @@@@
535
536 #ifdef DDB
537 db_machine_init();
538 if (boothowto & RB_KDB)
539 Debugger();
540 #endif
541 #if 0
542 printf("test data abort...\n");
543 *((volatile uint32_t*)(0x1234567F)) = 0xdeadbeef;
544 #endif
545
546 #ifdef VERBOSE_INIT_ARM
547 printf("%s: returning new stack pointer 0x%lX\n", __FUNCTION__, (kernelstack.pv_va + USPACE_SVC_STACK_TOP));
548 #endif
549
550 /* We return the new stack pointer address */
551 return kernelstack.pv_va + USPACE_SVC_STACK_TOP;
552 }
553
554 static int
at91bus_match(device_t parent,cfdata_t match,void * aux)555 at91bus_match(device_t parent, cfdata_t match, void *aux)
556 {
557 // we could detect the device here...
558 if (strcmp(match->cf_name, "at91bus") == 0)
559 return 1;
560 return 0;
561 }
562
563 static device_t
at91bus_found(device_t self,bus_addr_t addr,int pid)564 at91bus_found(device_t self, bus_addr_t addr, int pid)
565 {
566 int locs[AT91BUSCF_NLOCS];
567 struct at91bus_attach_args sa;
568 struct at91bus_softc *sc;
569
570 memset(&locs, 0, sizeof(locs));
571 memset(&sa, 0, sizeof(sa));
572
573 locs[AT91BUSCF_ADDR] = addr;
574 locs[AT91BUSCF_PID] = pid;
575
576 sc = device_private(self);
577 sa.sa_iot = sc->sc_iot;
578 sa.sa_dmat = sc->sc_dmat;
579 sa.sa_addr = addr;
580 sa.sa_size = 1;
581 sa.sa_pid = pid;
582
583 return config_found(self, &sa, at91bus_print,
584 CFARGS(.submatch = at91bus_submatch,
585 .locators = locs));
586 }
587
588 static void
at91bus_attach(device_t parent,device_t self,void * aux)589 at91bus_attach(device_t parent, device_t self, void *aux)
590 {
591 struct at91bus_softc *sc;
592
593 if (at91_chip_ndx < 0)
594 panic("%s: at91bus_init() has not been called!", __FUNCTION__);
595
596 sc = device_private(self);
597
598 /* initialize bus space and bus dma things... */
599 sc->sc_iot = &at91_bs_tag;
600 sc->sc_dmat = at91_bus_dma_init(&at91_bd_tag);
601
602 if (at91bus_sc == NULL)
603 at91bus_sc = sc;
604
605 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",
606 at91_types[at91_chip_ndx].name,
607 AT91_SCLK / 1000U, AT91_SCLK % 1000U,
608 AT91_MCLK / 1000000U, (AT91_MCLK / 1000U) % 1000U,
609 AT91_PCLK / 1000000U, (AT91_PCLK / 1000U) % 1000U,
610 AT91_MSTCLK / 1000000U, (AT91_MSTCLK / 1000U) % 1000U,
611 AT91_PLLACLK / 1000000U, (AT91_PLLACLK / 1000U) % 1000U,
612 AT91_PLLBCLK / 1000000U, (AT91_PLLBCLK / 1000U) % 1000U);
613
614 /*
615 * Attach devices
616 */
617 at91_search_peripherals(self, at91bus_found);
618
619
620 struct at91bus_attach_args sa;
621 memset(&sa, 0, sizeof(sa));
622 sa.sa_iot = sc->sc_iot;
623 sa.sa_dmat = sc->sc_dmat;
624 config_search(self, &sa,
625 CFARGS(.search = at91bus_search));
626 }
627
628 int
at91bus_submatch(device_t parent,cfdata_t cf,const int * ldesc,void * aux)629 at91bus_submatch(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
630 {
631 struct at91bus_attach_args *sa = aux;
632
633 if (cf->cf_loc[AT91BUSCF_ADDR] == ldesc[AT91BUSCF_ADDR]
634 && cf->cf_loc[AT91BUSCF_PID] == ldesc[AT91BUSCF_PID]) {
635 sa->sa_addr = cf->cf_loc[AT91BUSCF_ADDR];
636 sa->sa_size = cf->cf_loc[AT91BUSCF_SIZE];
637 sa->sa_pid = cf->cf_loc[AT91BUSCF_PID];
638 return (config_match(parent, cf, aux));
639 } else
640 return (0);
641 }
642
643 int
at91bus_search(device_t parent,cfdata_t cf,const int * ldesc,void * aux)644 at91bus_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
645 {
646 struct at91bus_attach_args *sa = aux;
647
648 sa->sa_addr = cf->cf_loc[AT91BUSCF_ADDR];
649 sa->sa_size = cf->cf_loc[AT91BUSCF_SIZE];
650 sa->sa_pid = cf->cf_loc[AT91BUSCF_PID];
651
652 if (config_probe(parent, cf, aux))
653 config_attach(parent, cf, aux, at91bus_print, CFARGS_NONE);
654
655 return (0);
656 }
657
658 static int
at91bus_print(void * aux,const char * name)659 at91bus_print(void *aux, const char *name)
660 {
661 struct at91bus_attach_args *sa = (struct at91bus_attach_args*)aux;
662
663 if (name)
664 aprint_normal("%s at %s", sa->sa_pid >= 0 ? at91_peripheral_name(sa->sa_pid) : "device", name);
665
666 if (sa->sa_size)
667 aprint_normal(" at addr 0x%lx", sa->sa_addr);
668 if (sa->sa_size > 1)
669 aprint_normal("-0x%lx", sa->sa_addr + sa->sa_size - 1);
670 if (sa->sa_pid >= 0)
671 aprint_normal(" pid %d", sa->sa_pid);
672
673 return (UNCONF);
674 }
675
consinit(void)676 void consinit(void)
677 {
678 static int consinit_called;
679
680 if (consinit_called != 0)
681 return;
682
683 consinit_called = 1;
684
685 if (at91_chip_ndx < 0)
686 panic("%s: at91_init() has not been called!", __FUNCTION__);
687
688 // call machine specific bus initialization code
689 (*at91bus_tag->init)(&at91bus_clocks);
690
691 // attach console
692 (*at91bus_tag->attach_cn)(&at91_bs_tag, cnspeed, cnmode);
693 }
694