1 /* $NetBSD: armadillo9_machdep.c,v 1.41 2024/02/20 23:36:02 andvar Exp $ */
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 dependent functions for kernel setup for Armadillo.
73 */
74
75 /* Armadillo-9 physical memory map
76 0000 0000 - 0fff ffff reserved
77 1000 0000 - 1000 000f I/O Control Register
78 1000 0010 - 11dd ffff reserved
79 1200 0000 - 1200 ffff PC/104 I/O space (8bit)
80 1201 0000 - 12ff ffff reserved
81 1300 0000 - 13ff ffff PC/104 Memory space (8bit)
82 1400 0000 - 1fff ffff reserved
83 2000 0000 - 21ff ffff reserved
84 2200 0000 - 2200 ffff PC/104 I/O space (16bit)
85 2201 0000 - 22ff ffff reserved
86 2300 0000 - 23ff ffff PC/104 Memory space (16bit)
87 2400 0000 - 2fff ffff reserved
88 3000 0000 - 3fff ffff reserved
89 4000 0000 - 43ff ffff Compact Flash I/O space
90 4400 0000 - 47ff ffff reserved
91 4800 0000 - 4bff ffff Compact Flash Attribute space
92 4c00 0000 - 4fff ffff Compact Flash memory space
93 5000 0000 - 5fff ffff reserved
94 6000 0000 - 607f ffff Flash Memory (8MByte)
95 6080 0000 - 6fff ffff reserved
96 7000 0000 - 7fff ffff reserved
97 8000 0000 - 8008 ffff EP9315 Internal Register (AHB)
98 8009 0000 - 8009 3fff Internal Boot ROM (16kByte)
99 8009 4000 - 8009 ffff reserved
100 800a 0000 - 800f ffff EP9315 Internal Register (AHB)
101 8010 0000 - 807f ffff reserved
102 8080 0000 - 8094 ffff EP9315 Internal Register (APB)
103 8095 0000 - 8fff ffff reserved
104 9000 0000 - bfff ffff reserved
105 c000 0000 - c1ff ffff SDRAM (32MByte)
106 c200 0000 - c3ff ffff reserved
107 c400 0000 - c5ff ffff SDRAM (32MByte)
108 c600 0000 - cfff ffff reserved
109 d000 0000 - ffff ffff reserved
110 */
111
112 #include <sys/cdefs.h>
113 __KERNEL_RCSID(0, "$NetBSD: armadillo9_machdep.c,v 1.41 2024/02/20 23:36:02 andvar Exp $");
114
115 #include "opt_arm_debug.h"
116 #include "opt_console.h"
117 #include "opt_ddb.h"
118 #include "opt_kgdb.h"
119
120 #include <sys/param.h>
121 #include <sys/device.h>
122 #include <sys/systm.h>
123 #include <sys/kernel.h>
124 #include <sys/exec.h>
125 #include <sys/proc.h>
126 #include <sys/msgbuf.h>
127 #include <sys/reboot.h>
128 #include <sys/termios.h>
129 #include <sys/ksyms.h>
130 #include <sys/bus.h>
131 #include <sys/cpu.h>
132
133 #include <net/if.h>
134 #include <net/if_ether.h>
135
136 #include <uvm/uvm_extern.h>
137
138 #include <dev/cons.h>
139
140 #include <machine/db_machdep.h>
141 #include <ddb/db_sym.h>
142 #include <ddb/db_extern.h>
143
144 #define DRAM_BLOCKS 4
145 #include <machine/bootconfig.h>
146 #include <machine/autoconf.h>
147 #include <arm/locore.h>
148 #include <arm/undefined.h>
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 #include <arm/arm32/machdep.h>
156
157 #include <arm/ep93xx/ep93xxreg.h>
158 #include <arm/ep93xx/ep93xxvar.h>
159
160 #include "epwdog.h"
161 #if NEPWDOG > 0
162 #include <arm/ep93xx/epwdogvar.h>
163 #endif
164 #include <arm/ep93xx/epwdogreg.h>
165
166 #include <dev/ic/comreg.h>
167 #include <dev/ic/comvar.h>
168
169 #include "epcom.h"
170 #if NEPCOM > 0
171 #include <arm/ep93xx/epcomvar.h>
172 #endif
173
174 #include "isa.h"
175 #if NISA > 0
176 #include <dev/isa/isareg.h>
177 #include <dev/isa/isavar.h>
178 #endif
179
180 #include <machine/isa_machdep.h>
181
182 #include <evbarm/armadillo/armadillo9reg.h>
183 #include <evbarm/armadillo/armadillo9var.h>
184
185 struct armadillo_model_t *armadillo_model = 0;
186 static struct armadillo_model_t armadillo_model_table[] = {
187 { DEVCFG_ARMADILLO9, "Armadillo-9" },
188 { DEVCFG_ARMADILLO210, "Armadillo-210" },
189 { 0, "Armadillo(unknown model)" } };
190
191 #include "ksyms.h"
192
193 /* Kernel text starts 2MB in from the bottom of the kernel address space. */
194 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000)
195 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000)
196
197 /*
198 * The range 0xc1000000 - 0xccffffff is available for kernel VM space
199 * Core-logic registers and I/O mappings occupy 0xf0000000 - 0xffffffff
200 */
201 #define KERNEL_VM_SIZE 0x0c000000
202
203
204 BootConfig bootconfig; /* Boot config storage */
205 char *boot_args = NULL;
206 char *boot_file = NULL;
207
208 vaddr_t physical_start;
209 vaddr_t physical_freestart;
210 vaddr_t physical_freeend;
211 vaddr_t physical_freeend_low;
212 vaddr_t physical_end;
213 u_int free_pages;
214
215 paddr_t msgbufphys;
216
217 static struct arm32_dma_range armadillo9_dma_ranges[4];
218
219 #if NISA > 0
220 extern void isa_armadillo9_init(u_int, u_int);
221 #endif
222
223 #define KERNEL_PT_SYS 0 /* L2 table for mapping vectors page */
224
225 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */
226 #define KERNEL_PT_KERNEL_NUM 4
227 /* L2 tables for mapping kernel VM */
228 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM)
229
230 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */
231 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM)
232
233 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS];
234
235 /* Prototypes */
236
237 void consinit(void);
238 /*
239 * Define the default console speed for the machine.
240 */
241 #if NEPCOM > 0
242 #ifndef CONSPEED
243 #define CONSPEED B115200
244 #endif /* ! CONSPEED */
245
246 #ifndef CONMODE
247 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
248 #endif
249
250 #ifndef CONUNIT
251 #define CONUNIT 0
252 #endif
253
254 int comcnspeed = CONSPEED;
255 int comcnmode = CONMODE;
256 const unsigned long comaddr[] = {
257 EP93XX_APB_UART1, EP93XX_APB_UART2 };
258 #endif
259
260 #if KGDB
261 #ifndef KGDB_DEVNAME
262 #error Must define KGDB_DEVNAME
263 #endif
264 const char kgdb_devname[] = KGDB_DEVNAME;
265
266 #ifndef KGDB_DEVADDR
267 #error Must define KGDB_DEVADDR
268 #endif
269 unsigned long kgdb_devaddr = KGDB_DEVADDR;
270
271 #ifndef KGDB_DEVRATE
272 #define KGDB_DEVRATE CONSPEED
273 #endif
274 int kgdb_devrate = KGDB_DEVRATE;
275
276 #ifndef KGDB_DEVMODE
277 #define KGDB_DEVMODE CONMODE
278 #endif
279 int kgdb_devmode = KGDB_DEVMODE;
280 #endif /* KGDB */
281
282 /*
283 * MAC address for the built-in Ethernet.
284 */
285 uint8_t armadillo9_ethaddr[ETHER_ADDR_LEN];
286
287 static void
armadillo9_device_register(device_t dev,void * aux)288 armadillo9_device_register(device_t dev, void *aux)
289 {
290
291 /* MAC address for the built-in Ethernet. */
292 if (device_is_a(dev, "epe")) {
293 prop_data_t pd = prop_data_create_data_nocopy(
294 armadillo9_ethaddr, ETHER_ADDR_LEN);
295 KASSERT(pd != NULL);
296 if (prop_dictionary_set(device_properties(dev),
297 "mac-address", pd) == false) {
298 printf("WARNING: unable to set mac-addr property "
299 "for %s\n", device_xname(dev));
300 }
301 prop_object_release(pd);
302 }
303 }
304
305 /*
306 * void cpu_reboot(int howto, char *bootstr)
307 *
308 * Reboots the system
309 *
310 * Deal with any syncing, unmounting, dumping and shutdown hooks,
311 * then reset the CPU.
312 */
313 void
cpu_reboot(int howto,char * bootstr)314 cpu_reboot(int howto, char *bootstr)
315 {
316 /*
317 * If we are still cold then hit the air brakes
318 * and crash to earth fast
319 */
320 if (cold) {
321 doshutdownhooks();
322 pmf_system_shutdown(boothowto);
323 printf("\r\n");
324 printf("The operating system has halted.\r\n");
325 printf("Please press any key to reboot.\r\n");
326 cngetc();
327 printf("\r\nrebooting...\r\n");
328 goto reset;
329 }
330
331 /* Disable console buffering */
332
333 /*
334 * If RB_NOSYNC was not specified sync the discs.
335 * Note: Unless cold is set to 1 here, syslogd will die during the
336 * unmount. It looks like syslogd is getting woken up only to find
337 * that it cannot page part of the binary in as the filesystem has
338 * been unmounted.
339 */
340 if (!(howto & RB_NOSYNC))
341 bootsync();
342
343 /* Say NO to interrupts */
344 splhigh();
345
346 /* Do a dump if requested. */
347 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP)
348 dumpsys();
349
350 /* Run any shutdown hooks */
351 doshutdownhooks();
352
353 pmf_system_shutdown(boothowto);
354
355 /* Make sure IRQ's are disabled */
356 IRQdisable;
357
358 if (howto & RB_HALT) {
359 printf("\r\n");
360 printf("The operating system has halted.\r\n");
361 printf("Please press any key to reboot.\r\n");
362 cngetc();
363 }
364
365 printf("\r\nrebooting...\r\n");
366 reset:
367 /*
368 * Make really really sure that all interrupts are disabled,
369 * and poke the Internal Bus and Peripheral Bus reset lines.
370 */
371 (void) disable_interrupts(I32_bit|F32_bit);
372 #if NEPWDOG > 0
373 epwdog_reset();
374 #else
375 {
376 uint32_t ctrl = EP93XX_APB_VBASE + EP93XX_APB_WDOG + EP93XX_WDOG_Ctrl;
377 uint32_t val = EP93XX_WDOG_ENABLE;
378 __asm volatile (
379 "str %1, [%0]\n"
380 :
381 : "r" (ctrl), "r" (val)
382 );
383 }
384 #endif
385 for (;;);
386 }
387
388 /* Static device mappings. */
389 static const struct pmap_devmap armadillo9_devmap[] = {
390 {
391 EP93XX_AHB_VBASE,
392 EP93XX_AHB_HWBASE,
393 EP93XX_AHB_SIZE,
394 VM_PROT_READ|VM_PROT_WRITE,
395 PTE_NOCACHE,
396 },
397
398 {
399 EP93XX_APB_VBASE,
400 EP93XX_APB_HWBASE,
401 EP93XX_APB_SIZE,
402 VM_PROT_READ|VM_PROT_WRITE,
403 PTE_NOCACHE,
404 },
405
406 {
407 EP93XX_PCMCIA0_VBASE,
408 EP93XX_PCMCIA0_HWBASE,
409 EP93XX_PCMCIA_SIZE,
410 VM_PROT_READ|VM_PROT_WRITE,
411 PTE_NOCACHE,
412 },
413
414 /*
415 * IO8 and IO16 space *must* be mapped contiguously with
416 * IO8_VA == IO16_VA - 64 Mbytes. ISA busmap driver depends
417 * on that!
418 */
419 {
420 ARMADILLO9_IO8_VBASE,
421 ARMADILLO9_IO8_HWBASE,
422 ARMADILLO9_IO8_SIZE,
423 VM_PROT_READ|VM_PROT_WRITE,
424 PTE_NOCACHE,
425 },
426
427 {
428 ARMADILLO9_IO16_VBASE,
429 ARMADILLO9_IO16_HWBASE,
430 ARMADILLO9_IO16_SIZE,
431 VM_PROT_READ|VM_PROT_WRITE,
432 PTE_NOCACHE,
433 },
434
435 {
436 0,
437 0,
438 0,
439 0,
440 0,
441 }
442 };
443
444 /*
445 * vaddr_t initarm(...)
446 *
447 * Initial entry point on startup. This gets called before main() is
448 * entered.
449 * It should be responsible for setting up everything that must be
450 * in place when main is called.
451 * This includes
452 * Taking a copy of the boot configuration structure.
453 * Initialising the physical console so characters can be printed.
454 * Setting up page tables for the kernel
455 * Initialising interrupt controllers to a sane default state
456 */
457 vaddr_t
initarm(void * arg)458 initarm(void *arg)
459 {
460 int loop;
461 int loop1;
462 u_int l1pagetable;
463 struct bootparam_tag *bootparam_p;
464 unsigned long devcfg;
465
466 /*
467 * Since we map the on-board devices VA==PA, and the kernel
468 * is running VA==PA, it's possible for us to initialize
469 * the console now.
470 */
471 consinit();
472
473 /* identify model */
474 devcfg = *((volatile unsigned long*)(EP93XX_APB_HWBASE
475 + EP93XX_APB_SYSCON
476 + EP93XX_SYSCON_DeviceCfg));
477 for (armadillo_model = &armadillo_model_table[0];
478 armadillo_model->devcfg; armadillo_model++)
479 if (devcfg == armadillo_model->devcfg)
480 break;
481
482 /* Talk to the user */
483 printf("\nNetBSD/%s booting ...\n", armadillo_model->name);
484
485 /* set some informations from bootloader */
486 bootparam_p = (struct bootparam_tag *)bootparam;
487 bootconfig.dramblocks = 0;
488 while (bootparam_p->hdr.tag != BOOTPARAM_TAG_NONE) {
489 switch (bootparam_p->hdr.tag) {
490 case BOOTPARAM_TAG_MEM:
491 if (bootconfig.dramblocks < DRAM_BLOCKS) {
492 #ifdef VERBOSE_INIT_ARM
493 printf("dram[%d]: address=0x%08lx, size=0x%08lx\n",
494 bootconfig.dramblocks,
495 bootparam_p->u.mem.start,
496 bootparam_p->u.mem.size);
497 #endif
498 bootconfig.dram[bootconfig.dramblocks].address =
499 bootparam_p->u.mem.start;
500 bootconfig.dram[bootconfig.dramblocks].pages =
501 bootparam_p->u.mem.size / PAGE_SIZE;
502 bootconfig.dramblocks++;
503 }
504 break;
505 case BOOTPARAM_TAG_CMDLINE:
506 #ifdef VERBOSE_INIT_ARM
507 printf("cmdline: %s\n", bootparam_p->u.cmdline.cmdline);
508 #endif
509 parse_mi_bootargs(bootparam_p->u.cmdline.cmdline);
510 break;
511 }
512 bootparam_p = bootparam_tag_next(bootparam_p);
513 }
514
515 /*
516 * Heads up ... Setup the CPU / MMU / TLB functions
517 */
518 if (set_cpufuncs())
519 panic("cpu not recognized!");
520
521 #ifdef VERBOSE_INIT_ARM
522 printf("initarm: Configuring system ...\n");
523 #endif
524 /*
525 * Set up the variables that define the availability of
526 * physical memory. For now, we're going to set
527 * physical_freestart to 0xc0200000 (where the kernel
528 * was loaded), and allocate the memory we need downwards.
529 * If we get too close to the L1 table that we set up, we
530 * will panic. We will update physical_freestart and
531 * physical_freeend later to reflect what pmap_bootstrap()
532 * wants to see.
533 *
534 * XXX pmap_bootstrap() needs an enema.
535 */
536 physical_start = bootconfig.dram[0].address;
537 physical_end = bootconfig.dram[0].address
538 + (bootconfig.dram[0].pages * PAGE_SIZE);
539
540 physical_freestart = 0xc0018000UL;
541 physical_freeend = 0xc0200000UL;
542
543 physmem = (physical_end - physical_start) / PAGE_SIZE;
544
545 #ifdef VERBOSE_INIT_ARM
546 /* Tell the user about the memory */
547 printf("physmemory: 0x%"PRIxPSIZE" pages at "
548 "0x%08"PRIxPADDR" -> 0x%08"PRIxPADDR"\n",
549 physmem, physical_start, physical_end - 1);
550 #endif
551
552 /*
553 * Okay, the kernel starts 2MB in from the bottom of physical
554 * memory. We are going to allocate our bootstrap pages downwards
555 * from there.
556 *
557 * We need to allocate some fixed page tables to get the kernel
558 * going. We allocate one page directory and a number of page
559 * tables and store the physical addresses in the kernel_pt_table
560 * array.
561 *
562 * The kernel page directory must be on a 16K boundary. The page
563 * tables must be on 4K boundaries. What we do is allocate the
564 * page directory on the first 16K boundary that we encounter, and
565 * the page tables on 4K boundaries otherwise. Since we allocate
566 * at least 3 L2 page tables, we are guaranteed to encounter at
567 * least one 16K aligned region.
568 */
569
570 #ifdef VERBOSE_INIT_ARM
571 printf("Allocating page tables\n");
572 #endif
573
574 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;
575
576 #ifdef VERBOSE_INIT_ARM
577 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n",
578 physical_freestart, free_pages, free_pages);
579 #endif
580
581 /* Define a macro to simplify memory allocation */
582 #define valloc_pages(var, np) \
583 alloc_pages((var).pv_pa, (np)); \
584 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;
585
586 #define alloc_pages(var, np) \
587 physical_freeend -= ((np) * PAGE_SIZE); \
588 if (physical_freeend < physical_freestart) \
589 panic("initarm: out of memory"); \
590 (var) = physical_freeend; \
591 free_pages -= (np); \
592 memset((char *)(var), 0, ((np) * PAGE_SIZE));
593
594 loop1 = 0;
595 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
596 /* Are we 16KB aligned for an L1 ? */
597 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0
598 && kernel_l1pt.pv_pa == 0) {
599 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
600 } else {
601 valloc_pages(kernel_pt_table[loop1],
602 L2_TABLE_SIZE / PAGE_SIZE);
603 ++loop1;
604 }
605 }
606
607 /* This should never be able to happen but better confirm that. */
608 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0)
609 panic("initarm: Failed to align the kernel page directory");
610
611 /*
612 * Allocate a page for the system vectors page
613 */
614 alloc_pages(systempage.pv_pa, 1);
615
616 /* Allocate stacks for all modes */
617 valloc_pages(irqstack, IRQ_STACK_SIZE);
618 valloc_pages(abtstack, ABT_STACK_SIZE);
619 valloc_pages(undstack, UND_STACK_SIZE);
620 valloc_pages(kernelstack, UPAGES);
621
622 #ifdef VERBOSE_INIT_ARM
623 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa,
624 irqstack.pv_va);
625 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa,
626 abtstack.pv_va);
627 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa,
628 undstack.pv_va);
629 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa,
630 kernelstack.pv_va);
631 #endif
632
633 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);
634
635 /*
636 * Ok we have allocated physical pages for the primary kernel
637 * page tables. Save physical_freeend for when we give whats left
638 * of memory below 2Mbyte to UVM.
639 */
640
641 physical_freeend_low = physical_freeend;
642
643 #ifdef VERBOSE_INIT_ARM
644 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa);
645 #endif
646
647 /*
648 * Now we start construction of the L1 page table
649 * We start by mapping the L2 page tables into the L1.
650 * This means that we can replace L1 mappings later on if necessary
651 */
652 l1pagetable = kernel_l1pt.pv_pa;
653
654 /* Map the L2 pages tables in the L1 page table */
655 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1),
656 &kernel_pt_table[KERNEL_PT_SYS]);
657 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++)
658 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000,
659 &kernel_pt_table[KERNEL_PT_KERNEL + loop]);
660 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++)
661 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
662 &kernel_pt_table[KERNEL_PT_VMDATA + loop]);
663
664 /* update the top of the kernel VM */
665 pmap_curmaxkvaddr =
666 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);
667
668 #ifdef VERBOSE_INIT_ARM
669 printf("Mapping kernel\n");
670 #endif
671
672 /* Now we fill in the L2 pagetable for the kernel static code/data */
673 {
674 extern char etext[], _end[];
675 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE;
676 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE;
677 u_int logical;
678
679 textsize = (textsize + PGOFSET) & ~PGOFSET;
680 totalsize = (totalsize + PGOFSET) & ~PGOFSET;
681
682 logical = 0x00200000; /* offset of kernel in RAM */
683 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
684 physical_start + logical, textsize,
685 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
686 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
687 physical_start + logical, totalsize - textsize,
688 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
689 }
690
691 #ifdef VERBOSE_INIT_ARM
692 printf("Constructing L2 page tables\n");
693 #endif
694
695 /* Map the stack pages */
696 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
697 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
698 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
699 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
700 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
701 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
702 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
703 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
704
705 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
706 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
707
708 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
709 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
710 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
711 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
712 }
713
714 /* Map the vector page. */
715 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
716 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
717
718 /* Map the statically mapped devices. */
719 pmap_devmap_bootstrap(l1pagetable, armadillo9_devmap);
720
721 /*
722 * Update the physical_freestart/physical_freeend/free_pages
723 * variables.
724 */
725 {
726 extern char _end[];
727
728 physical_freestart = physical_start +
729 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) -
730 KERNEL_BASE);
731 physical_freeend = physical_end;
732 free_pages =
733 (physical_freeend - physical_freestart) / PAGE_SIZE;
734 }
735
736 /*
737 * Now we have the real page tables in place so we can switch to them.
738 * Once this is done we will be running with the REAL kernel page
739 * tables.
740 */
741
742 /* Switch tables */
743 #ifdef VERBOSE_INIT_ARM
744 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
745 physical_freestart, free_pages, free_pages);
746 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa);
747 #endif
748 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
749 cpu_setttb(kernel_l1pt.pv_pa, true);
750 cpu_tlb_flushID();
751 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
752
753 /*
754 * Moved from cpu_startup() as data_abort_handler() references
755 * this during uvm init
756 */
757 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);
758
759 #ifdef VERBOSE_INIT_ARM
760 printf("done!\n");
761 #endif
762
763 #ifdef VERBOSE_INIT_ARM
764 printf("bootstrap done.\n");
765 #endif
766
767 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
768
769 /*
770 * Pages were allocated during the secondary bootstrap for the
771 * stacks for different CPU modes.
772 * We must now set the r13 registers in the different CPU modes to
773 * point to these stacks.
774 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
775 * of the stack memory.
776 */
777 #ifdef VERBOSE_INIT_ARM
778 printf("init subsystems: stacks ");
779 #endif
780
781 set_stackptr(PSR_IRQ32_MODE,
782 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
783 set_stackptr(PSR_ABT32_MODE,
784 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
785 set_stackptr(PSR_UND32_MODE,
786 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
787
788 /*
789 * Well we should set a data abort handler.
790 * Once things get going this will change as we will need a proper
791 * handler.
792 * Until then we will use a handler that just panics but tells us
793 * why.
794 * Initialisation of the vectors will just panic on a data abort.
795 * This just fills in a slightly better one.
796 */
797 #ifdef VERBOSE_INIT_ARM
798 printf("vectors ");
799 #endif
800 data_abort_handler_address = (u_int)data_abort_handler;
801 prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
802 undefined_handler_address = (u_int)undefinedinstruction_bounce;
803
804 /* Initialise the undefined instruction handlers */
805 #ifdef VERBOSE_INIT_ARM
806 printf("undefined ");
807 #endif
808 undefined_init();
809
810 /* Load memory into UVM. */
811 #ifdef VERBOSE_INIT_ARM
812 printf("page ");
813 #endif
814 uvm_md_init();
815 uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
816 atop(physical_freestart), atop(physical_freeend),
817 VM_FREELIST_DEFAULT);
818 uvm_page_physload(atop(0xc0000000), atop(physical_freeend_low),
819 atop(0xc0000000), atop(physical_freeend_low),
820 VM_FREELIST_DEFAULT);
821 physmem = bootconfig.dram[0].pages;
822 for (loop = 1; loop < bootconfig.dramblocks; ++loop) {
823 size_t start = bootconfig.dram[loop].address;
824 size_t size = bootconfig.dram[loop].pages * PAGE_SIZE;
825 uvm_page_physload(atop(start), atop(start + size),
826 atop(start), atop(start + size),
827 VM_FREELIST_DEFAULT);
828 physmem += bootconfig.dram[loop].pages;
829 }
830
831 /* Boot strap pmap telling it where managed kernel virtual memory is */
832 #ifdef VERBOSE_INIT_ARM
833 printf("pmap ");
834 #endif
835 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);
836
837 /* Setup the IRQ system */
838 #ifdef VERBOSE_INIT_ARM
839 printf("irq ");
840 #endif
841 ep93xx_intr_init();
842 #if NISA > 0
843 isa_intr_init();
844
845 #ifdef VERBOSE_INIT_ARM
846 printf("isa ");
847 #endif
848 isa_armadillo9_init(ARMADILLO9_IO16_VBASE + ARMADILLO9_ISAIO,
849 ARMADILLO9_IO16_VBASE + ARMADILLO9_ISAMEM);
850 #endif
851
852 #ifdef VERBOSE_INIT_ARM
853 printf("done.\n");
854 #endif
855
856 #ifdef BOOTHOWTO
857 boothowto = BOOTHOWTO;
858 #endif
859
860 #ifdef DDB
861 db_machine_init();
862 if (boothowto & RB_KDB)
863 Debugger();
864 #endif
865
866 /* We have our own device_register() */
867 evbarm_device_register = armadillo9_device_register;
868
869 /* We return the new stack pointer address */
870 return kernelstack.pv_va + USPACE_SVC_STACK_TOP;
871 }
872
873 void
consinit(void)874 consinit(void)
875 {
876 static int consinit_called;
877 #if NEPCOM > 0
878 bus_space_handle_t ioh;
879 #endif
880
881 if (consinit_called != 0)
882 return;
883
884 consinit_called = 1;
885
886 /*
887 * Console devices are already mapped in VA. Our devmap reflects
888 * this, so register it now so drivers can map the console
889 * device.
890 */
891 pmap_devmap_register(armadillo9_devmap);
892
893 #if NEPCOM > 0
894 bus_space_map(&ep93xx_bs_tag, EP93XX_APB_HWBASE + comaddr[CONUNIT],
895 EP93XX_APB_UART_SIZE, 0, &ioh);
896 if (epcomcnattach(&ep93xx_bs_tag, EP93XX_APB_HWBASE + comaddr[CONUNIT],
897 ioh, comcnspeed, comcnmode))
898 {
899 panic("can't init serial console");
900 }
901 #else
902 panic("serial console not configured");
903 #endif
904 #if KGDB
905 #if NEPCOM > 0
906 if (strcmp(kgdb_devname, "epcom") == 0) {
907 epcom_kgdb_attach(&ep93xx_bs_tag, kgdb_devaddr, kgdb_devrate,
908 kgdb_devmode);
909 }
910 #endif /* NEPCOM > 0 */
911 #endif /* KGDB */
912 }
913
914
915 bus_dma_tag_t
ep93xx_bus_dma_init(struct arm32_bus_dma_tag * dma_tag_template)916 ep93xx_bus_dma_init(struct arm32_bus_dma_tag *dma_tag_template)
917 {
918 int i;
919 struct arm32_bus_dma_tag *dmat;
920
921 for (i = 0; i < bootconfig.dramblocks; i++) {
922 armadillo9_dma_ranges[i].dr_sysbase = bootconfig.dram[i].address;
923 armadillo9_dma_ranges[i].dr_busbase = bootconfig.dram[i].address;
924 armadillo9_dma_ranges[i].dr_len = bootconfig.dram[i].pages *
925 PAGE_SIZE;
926 }
927
928 dmat = dma_tag_template;
929
930 dmat->_ranges = armadillo9_dma_ranges;
931 dmat->_nranges = bootconfig.dramblocks;
932
933 return dmat;
934 }
935