1 /* $NetBSD: nslu2_machdep.c,v 1.41 2023/10/12 11:33:38 skrll Exp $ */
2
3 /*-
4 * Copyright (c) 2006 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Steve C. Woodford.
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 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31 /*
32 * Copyright (c) 2003
33 * Ichiro FUKUHARA <ichiro@ichiro.org>.
34 * All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
44 *
45 * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR
46 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
47 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
48 * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR
49 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
51 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
53 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
54 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
55 * SUCH DAMAGE.
56 */
57 /*
58 * Copyright (c) 1997,1998 Mark Brinicombe.
59 * Copyright (c) 1997,1998 Causality Limited.
60 * All rights reserved.
61 *
62 * Redistribution and use in source and binary forms, with or without
63 * modification, are permitted provided that the following conditions
64 * are met:
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 * 2. Redistributions in binary form must reproduce the above copyright
68 * notice, this list of conditions and the following disclaimer in the
69 * documentation and/or other materials provided with the distribution.
70 * 3. All advertising materials mentioning features or use of this software
71 * must display the following acknowledgement:
72 * This product includes software developed by Mark Brinicombe
73 * for the NetBSD Project.
74 * 4. The name of the company nor the name of the author may be used to
75 * endorse or promote products derived from this software without specific
76 * prior written permission.
77 *
78 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
79 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
80 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
81 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
82 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
83 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
84 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
85 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
86 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
87 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
88 * SUCH DAMAGE.
89 */
90
91 /*
92 * Machine dependent functions for kernel setup for Linksys NSLU2
93 * using RedBoot firmware.
94 */
95
96 #include <sys/cdefs.h>
97 __KERNEL_RCSID(0, "$NetBSD: nslu2_machdep.c,v 1.41 2023/10/12 11:33:38 skrll Exp $");
98
99 #include "opt_arm_debug.h"
100 #include "opt_console.h"
101 #include "opt_ddb.h"
102 #include "opt_kgdb.h"
103
104 #include <sys/param.h>
105 #include <sys/device.h>
106 #include <sys/systm.h>
107 #include <sys/kernel.h>
108 #include <sys/exec.h>
109 #include <sys/proc.h>
110 #include <sys/msgbuf.h>
111 #include <sys/reboot.h>
112 #include <sys/termios.h>
113 #include <sys/ksyms.h>
114 #include <sys/bus.h>
115 #include <sys/cpu.h>
116
117 #include <uvm/uvm_extern.h>
118
119 #include <dev/cons.h>
120
121 #include <machine/db_machdep.h>
122 #include <ddb/db_sym.h>
123 #include <ddb/db_extern.h>
124
125 #include <machine/bootconfig.h>
126 #include <arm/locore.h>
127 #include <arm/undefined.h>
128
129 #include <arm/arm32/machdep.h>
130
131 #include <arm/xscale/ixp425reg.h>
132 #include <arm/xscale/ixp425var.h>
133 #include <arm/xscale/ixp425_sipvar.h>
134
135 #include <evbarm/nslu2/nslu2reg.h>
136
137 #include "com.h"
138 #if NCOM > 0
139 #include <dev/ic/comreg.h>
140 #include <dev/ic/comvar.h>
141 #endif
142
143 #include "ksyms.h"
144
145 /* Kernel text starts 2MB in from the bottom of the kernel address space. */
146 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000)
147 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000)
148
149 /*
150 * The range 0xc1000000 - 0xccffffff is available for kernel VM space
151 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff
152 */
153 #define KERNEL_VM_SIZE 0x0C000000
154
155 BootConfig bootconfig; /* Boot config storage */
156 char *boot_args = NULL;
157 char *boot_file = NULL;
158
159 vaddr_t physical_start;
160 vaddr_t physical_freestart;
161 vaddr_t physical_freeend;
162 vaddr_t physical_end;
163 u_int free_pages;
164
165 /* Physical and virtual addresses for some global pages */
166 pv_addr_t minidataclean;
167
168 paddr_t msgbufphys;
169
170 extern int end;
171
172 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */
173
174 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */
175 #define KERNEL_PT_KERNEL_NUM 4
176 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM)
177 /* L2 tables for mapping kernel VM */
178 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1)
179 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */
180 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM)
181
182 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS];
183
184 /* Prototypes */
185
186 void consinit(void);
187 u_int cpu_get_control(void);
188
189 /*
190 * Define the default console speed for the board. This is generally
191 * what the firmware provided with the board defaults to.
192 */
193 #ifndef CONSPEED
194 #define CONSPEED B115200
195 #endif /* ! CONSPEED */
196
197 #ifndef CONUNIT
198 #define CONUNIT 0
199 #endif
200
201 #ifndef CONMODE
202 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */
203 #endif
204
205 int comcnspeed = CONSPEED;
206 int comcnmode = CONMODE;
207 int comcnunit = CONUNIT;
208
209 #if KGDB
210 #ifndef KGDB_DEVNAME
211 #error Must define KGDB_DEVNAME
212 #endif
213 const char kgdb_devname[] = KGDB_DEVNAME;
214
215 #ifndef KGDB_DEVADDR
216 #error Must define KGDB_DEVADDR
217 #endif
218 unsigned long kgdb_devaddr = KGDB_DEVADDR;
219
220 #ifndef KGDB_DEVRATE
221 #define KGDB_DEVRATE CONSPEED
222 #endif
223 int kgdb_devrate = KGDB_DEVRATE;
224
225 #ifndef KGDB_DEVMODE
226 #define KGDB_DEVMODE CONMODE
227 #endif
228 int kgdb_devmode = KGDB_DEVMODE;
229 #endif /* KGDB */
230
231 /*
232 * void cpu_reboot(int howto, char *bootstr)
233 *
234 * Reboots the system
235 *
236 * Deal with any syncing, unmounting, dumping and shutdown hooks,
237 * then reset the CPU.
238 */
239 void
cpu_reboot(int howto,char * bootstr)240 cpu_reboot(int howto, char *bootstr)
241 {
242
243 #ifdef DIAGNOSTIC
244 /* info */
245 printf("boot: howto=%08x curproc=%p\n", howto, curproc);
246 #endif
247
248 /*
249 * If we are still cold then hit the air brakes
250 * and crash to earth fast
251 */
252 if (cold) {
253 doshutdownhooks();
254 pmf_system_shutdown(boothowto);
255 printf("The operating system has halted.\n");
256 printf("Please press any key to reboot.\n\n");
257 cngetc();
258 goto reset;
259 }
260
261 /* Disable console buffering */
262
263 /*
264 * If RB_NOSYNC was not specified sync the discs.
265 * Note: Unless cold is set to 1 here, syslogd will die during the
266 * unmount. It looks like syslogd is getting woken up only to find
267 * that it cannot page part of the binary in as the filesystem has
268 * been unmounted.
269 */
270 if (!(howto & RB_NOSYNC))
271 bootsync();
272
273 /* Say NO to interrupts */
274 splhigh();
275
276 /* Do a dump if requested. */
277 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP)
278 dumpsys();
279
280 /* Run any shutdown hooks */
281 doshutdownhooks();
282
283 pmf_system_shutdown(boothowto);
284
285 /* Make sure IRQ's are disabled */
286 IRQdisable;
287
288 if ((howto & (RB_HALT | RB_POWERDOWN)) == RB_HALT) {
289 printf("The operating system has halted.\n");
290 printf("Please press any key to reboot.\n\n");
291 cngetc();
292 }
293
294 reset:
295 /*
296 * Make really really sure that all interrupts are disabled,
297 */
298 (void) disable_interrupts(I32_bit | F32_bit);
299
300 if (howto & RB_POWERDOWN) {
301 uint32_t reg;
302
303 printf("powering down...\n\r");
304 /* Delay to allow the UART's Tx FIFO to drain */
305 delay(50000);
306
307 #define GPRD(r) *((volatile uint32_t *)(IXP425_GPIO_VBASE+(r)))
308 #define GPWR(r,v) *((volatile uint32_t *)(IXP425_GPIO_VBASE+(r))) = (v)
309
310 /*
311 * Power-down pin requires a short pulse
312 */
313 reg = GPRD(IXP425_GPIO_GPOUTR);
314 reg |= 1u << GPIO_POWER_OFF;
315 GPWR(IXP425_GPIO_GPOUTR, reg);
316
317 delay(1000);
318
319 reg = GPRD(IXP425_GPIO_GPOUTR);
320 reg &= ~(1u << GPIO_POWER_OFF);
321 GPWR(IXP425_GPIO_GPOUTR, reg);
322
323 delay(500000);
324 printf("POWER OFF FAILED! TRYING TO REBOOT INSTEAD\n\r");
325 }
326
327 printf("rebooting...\n\r");
328
329 #define WDWR(r,v) *((volatile uint32_t *)(IXP425_OST_WDOG_VBASE+(r))) = (v)
330 /* Force a watchdog reset */
331 WDWR(IXP425_OST_WDOG_KEY, OST_WDOG_KEY_MAJICK);
332 WDWR(IXP425_OST_WDOG_ENAB, OST_WDOG_ENAB_RST_ENA);
333 WDWR(IXP425_OST_WDOG, 0x1000);
334 WDWR(IXP425_OST_WDOG_ENAB,
335 OST_WDOG_ENAB_RST_ENA | OST_WDOG_ENAB_CNT_ENA);
336
337 delay(500000);
338
339 /* ...and if that didn't work, just croak. */
340 printf("RESET FAILED!\n");
341
342 for (;;);
343 }
344
345 /* Static device mappings. */
346 static const struct pmap_devmap nslu2_devmap[] = {
347 /* Physical/Virtual address for I/O space */
348 DEVMAP_ENTRY(
349 IXP425_IO_VBASE,
350 IXP425_IO_HWBASE,
351 IXP425_IO_SIZE
352 ),
353
354 /* SDRAM Controller */
355 DEVMAP_ENTRY(
356 IXP425_MCU_VBASE,
357 IXP425_MCU_HWBASE,
358 IXP425_MCU_SIZE
359 ),
360
361 /*
362 * No need to map the following entries statically.
363 * If you revive these, align VBASE's to L1 section
364 * boundaries (see pmap_devmap.c).
365 */
366 #if 0
367 /* Expansion Bus */
368 DEVMAP_ENTRY(
369 IXP425_EXP_VBASE,
370 IXP425_EXP_HWBASE,
371 IXP425_EXP_SIZE
372 ),
373
374 /* IXP425 PCI Configuration */
375 DEVMAP_ENTRY(
376 IXP425_PCI_VBASE,
377 IXP425_PCI_HWBASE,
378 IXP425_PCI_SIZE
379 ),
380
381 /* PCI Memory Space */
382 DEVMAP_ENTRY(
383 IXP425_PCI_MEM_VBASE,
384 IXP425_PCI_MEM_HWBASE,
385 IXP425_PCI_MEM_SIZE
386 ),
387
388 /* Flash memory */
389 DEVMAP_ENTRY(
390 NSLU2_FLASH_VBASE,
391 NSLU2_FLASH_HWBASE,
392 NSLU2_FLASH_SIZE
393 ),
394 #endif
395
396 DEVMAP_ENTRY_END
397 };
398
399 /*
400 * vaddr_t initarm(...)
401 *
402 * Initial entry point on startup. This gets called before main() is
403 * entered.
404 * It should be responsible for setting up everything that must be
405 * in place when main is called.
406 * This includes
407 * Taking a copy of the boot configuration structure.
408 * Initialising the physical console so characters can be printed.
409 * Setting up page tables for the kernel
410 * Relocating the kernel to the bottom of physical memory
411 */
412 vaddr_t
initarm(void * arg)413 initarm(void *arg)
414 {
415 int loop;
416 int loop1;
417 u_int kerneldatasize;
418 u_int l1pagetable;
419 u_int freemempos;
420 uint32_t reg;
421
422 /*
423 * Make sure the power-down GPIO pin is configured correctly, as
424 * cpu_reboot() may be called early on (e.g. from within ddb(9)).
425 */
426 /* Pin is active-high, so make sure it's driven low */
427 reg = GPRD(IXP425_GPIO_GPOUTR);
428 reg &= ~(1u << GPIO_POWER_OFF);
429 GPWR(IXP425_GPIO_GPOUTR, reg);
430
431 /* Set as output */
432 reg = GPRD(IXP425_GPIO_GPOER);
433 reg &= ~(1u << GPIO_POWER_OFF);
434 GPWR(IXP425_GPIO_GPOER, reg);
435
436 /*
437 * Since we map v0xf0000000 == p0xc8000000, it's possible for
438 * us to initialize the console now.
439 */
440 consinit();
441
442 #ifdef VERBOSE_INIT_ARM
443 /* Talk to the user */
444 printf("\nNetBSD/evbarm (Linksys NSLU2) booting ...\n");
445 #endif
446
447 /*
448 * Heads up ... Setup the CPU / MMU / TLB functions
449 */
450 if (set_cpufuncs())
451 panic("cpu not recognized!");
452
453 /* XXX overwrite bootconfig to hardcoded values */
454 bootconfig.dramblocks = 1;
455 bootconfig.dram[0].address = 0x10000000;
456 bootconfig.dram[0].pages = ixp425_sdram_size() / PAGE_SIZE;
457
458 kerneldatasize = (uint32_t)&end - (uint32_t)KERNEL_TEXT_BASE;
459
460 #ifdef VERBOSE_INIT_ARM
461 printf("kernsize=0x%x\n", kerneldatasize);
462 #endif
463 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8;
464
465 /*
466 * Set up the variables that define the availability of
467 * physical memory. For now, we're going to set
468 * physical_freestart to 0x10200000 (where the kernel
469 * was loaded), and allocate the memory we need downwards.
470 * If we get too close to the L1 table that we set up, we
471 * will panic. We will update physical_freestart and
472 * physical_freeend later to reflect what pmap_bootstrap()
473 * wants to see.
474 *
475 * XXX pmap_bootstrap() needs an enema.
476 */
477 physical_start = bootconfig.dram[0].address;
478 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE);
479
480 physical_freestart = physical_start
481 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize;
482 physical_freeend = physical_end;
483
484 physmem = (physical_end - physical_start) / PAGE_SIZE;
485
486 /* Tell the user about the memory */
487 #ifdef VERBOSE_INIT_ARM
488 printf("physmemory: %" PRIuPSIZE " pages at "
489 "0x%08" PRIxPADDR " -> 0x%08" PRIxPADDR "\n",
490 physmem, physical_start, physical_end - 1);
491
492 printf("Allocating page tables\n");
493 #endif
494 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;
495
496 freemempos = 0x10000000;
497
498 #ifdef VERBOSE_INIT_ARM
499 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n",
500 physical_start, physical_end);
501 #endif
502
503 /* Define a macro to simplify memory allocation */
504 #define valloc_pages(var, np) \
505 alloc_pages((var).pv_pa, (np)); \
506 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;
507
508 #if 0
509 #define alloc_pages(var, np) \
510 physical_freeend -= ((np) * PAGE_SIZE); \
511 if (physical_freeend < physical_freestart) \
512 panic("initarm: out of memory"); \
513 (var) = physical_freeend; \
514 free_pages -= (np); \
515 memset((char *)(var), 0, ((np) * PAGE_SIZE));
516 #else
517 #define alloc_pages(var, np) \
518 (var) = freemempos; \
519 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \
520 freemempos += (np) * PAGE_SIZE;
521 #endif
522
523 loop1 = 0;
524 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
525 /* Are we 16KB aligned for an L1 ? */
526 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0
527 && kernel_l1pt.pv_pa == 0) {
528 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
529 } else {
530 valloc_pages(kernel_pt_table[loop1],
531 L2_TABLE_SIZE / PAGE_SIZE);
532 ++loop1;
533 }
534 }
535
536 /* This should never be able to happen but better confirm that. */
537 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0)
538 panic("initarm: Failed to align the kernel page directory");
539
540 /*
541 * Allocate a page for the system page.
542 * This page will just contain the system vectors and can be
543 * shared by all processes.
544 */
545 alloc_pages(systempage.pv_pa, 1);
546
547 /* Allocate stacks for all modes */
548 valloc_pages(irqstack, IRQ_STACK_SIZE);
549 valloc_pages(abtstack, ABT_STACK_SIZE);
550 valloc_pages(undstack, UND_STACK_SIZE);
551 valloc_pages(kernelstack, UPAGES);
552
553 /* Allocate enough pages for cleaning the Mini-Data cache. */
554 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE);
555 valloc_pages(minidataclean, 1);
556
557 #ifdef VERBOSE_INIT_ARM
558 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa,
559 irqstack.pv_va);
560 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa,
561 abtstack.pv_va);
562 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa,
563 undstack.pv_va);
564 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa,
565 kernelstack.pv_va);
566 #endif
567
568 /*
569 * XXX Defer this to later so that we can reclaim the memory
570 * XXX used by the RedBoot page tables.
571 */
572 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);
573
574 /*
575 * Ok we have allocated physical pages for the primary kernel
576 * page tables
577 */
578
579 #ifdef VERBOSE_INIT_ARM
580 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa);
581 #endif
582
583 /*
584 * Now we start construction of the L1 page table
585 * We start by mapping the L2 page tables into the L1.
586 * This means that we can replace L1 mappings later on if necessary
587 */
588 l1pagetable = kernel_l1pt.pv_pa;
589
590 /* Map the L2 pages tables in the L1 page table */
591 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1),
592 &kernel_pt_table[KERNEL_PT_SYS]);
593 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++)
594 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000,
595 &kernel_pt_table[KERNEL_PT_KERNEL + loop]);
596 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++)
597 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
598 &kernel_pt_table[KERNEL_PT_VMDATA + loop]);
599
600 /* update the top of the kernel VM */
601 pmap_curmaxkvaddr =
602 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);
603
604 pmap_link_l2pt(l1pagetable, IXP425_IO_VBASE,
605 &kernel_pt_table[KERNEL_PT_IO]);
606
607 #ifdef VERBOSE_INIT_ARM
608 printf("Mapping kernel\n");
609 #endif
610
611 /* Now we fill in the L2 pagetable for the kernel static code/data */
612 {
613 extern char etext[], _end[];
614 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE;
615 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE;
616 u_int logical;
617
618 textsize = (textsize + PGOFSET) & ~PGOFSET;
619 totalsize = (totalsize + PGOFSET) & ~PGOFSET;
620
621 logical = 0x00200000; /* offset of kernel in RAM */
622
623 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
624 physical_start + logical, textsize,
625 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
626 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
627 physical_start + logical, totalsize - textsize,
628 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
629
630 if (KERNEL_BASE + logical >= KERNEL_VM_BASE)
631 panic("VA for kernel image exhausted.");
632 }
633
634 #ifdef VERBOSE_INIT_ARM
635 printf("Constructing L2 page tables\n");
636 #endif
637
638 /* Map the stack pages */
639 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
640 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
641 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
642 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
643 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
644 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
645 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
646 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
647
648 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
649 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
650
651 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
652 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
653 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
654 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
655 }
656
657 /* Map the Mini-Data cache clean area. */
658 xscale_setup_minidata(l1pagetable, minidataclean.pv_va,
659 minidataclean.pv_pa);
660
661 /* Map the vector page. */
662 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
663 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
664
665 /*
666 * Map the IXP425 registers
667 */
668 pmap_devmap_bootstrap(l1pagetable, nslu2_devmap);
669
670 /*
671 * Give the XScale global cache clean code an appropriately
672 * sized chunk of unmapped VA space starting at 0xff000000
673 * (our device mappings end before this address).
674 */
675 xscale_cache_clean_addr = 0xff000000U;
676
677 /*
678 * Now we have the real page tables in place so we can switch to them.
679 * Once this is done we will be running with the REAL kernel page
680 * tables.
681 */
682
683 /*
684 * Update the physical_freestart/physical_freeend/free_pages
685 * variables.
686 */
687 {
688 extern char _end[];
689
690 physical_freestart = physical_start +
691 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) -
692 KERNEL_BASE);
693 physical_freeend = physical_end;
694 free_pages =
695 (physical_freeend - physical_freestart) / PAGE_SIZE;
696 }
697
698 /* Switch tables */
699 #ifdef VERBOSE_INIT_ARM
700 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
701 physical_freestart, free_pages, free_pages);
702 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa);
703 #endif
704 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
705 cpu_setttb(kernel_l1pt.pv_pa, true);
706 cpu_tlb_flushID();
707 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
708
709 /*
710 * Moved from cpu_startup() as data_abort_handler() references
711 * this during uvm init
712 */
713 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);
714
715 #ifdef VERBOSE_INIT_ARM
716 printf("bootstrap done.\n");
717 #endif
718
719 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
720
721 /*
722 * Pages were allocated during the secondary bootstrap for the
723 * stacks for different CPU modes.
724 * We must now set the r13 registers in the different CPU modes to
725 * point to these stacks.
726 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
727 * of the stack memory.
728 */
729 #ifdef VERBOSE_INIT_ARM
730 printf("init subsystems: stacks ");
731 #endif
732
733 set_stackptr(PSR_IRQ32_MODE,
734 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
735 set_stackptr(PSR_ABT32_MODE,
736 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
737 set_stackptr(PSR_UND32_MODE,
738 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
739
740 /*
741 * Well we should set a data abort handler.
742 * Once things get going this will change as we will need a proper
743 * handler.
744 * Until then we will use a handler that just panics but tells us
745 * why.
746 * Initialisation of the vectors will just panic on a data abort.
747 * This just fills in a slightly better one.
748 */
749 #ifdef VERBOSE_INIT_ARM
750 printf("vectors ");
751 #endif
752 data_abort_handler_address = (u_int)data_abort_handler;
753 prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
754 undefined_handler_address = (u_int)undefinedinstruction_bounce;
755
756 /* Initialise the undefined instruction handlers */
757 #ifdef VERBOSE_INIT_ARM
758 printf("undefined ");
759 #endif
760 undefined_init();
761
762 /* Load memory into UVM. */
763 #ifdef VERBOSE_INIT_ARM
764 printf("page ");
765 #endif
766 uvm_md_init();
767 uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
768 atop(physical_freestart), atop(physical_freeend),
769 VM_FREELIST_DEFAULT);
770
771 /* Boot strap pmap telling it where managed kernel virtual memory is */
772 #ifdef VERBOSE_INIT_ARM
773 printf("pmap ");
774 #endif
775 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);
776
777 /* Setup the IRQ system */
778 #ifdef VERBOSE_INIT_ARM
779 printf("irq ");
780 #endif
781 ixp425_intr_init();
782 #ifdef VERBOSE_INIT_ARM
783 printf("\nAll initialization done!\nNow Starting NetBSD, Here we go!\n");
784 #endif
785
786 #ifdef BOOTHOWTO
787 boothowto = BOOTHOWTO;
788 #endif
789
790 #ifdef DDB
791 db_machine_init();
792 if (boothowto & RB_KDB)
793 Debugger();
794 #endif
795
796 /* We return the new stack pointer address */
797 return kernelstack.pv_va + USPACE_SVC_STACK_TOP;
798 }
799
800 /*
801 * consinit
802 */
803 void
consinit(void)804 consinit(void)
805 {
806 static int consinit_called;
807 static const bus_addr_t addrs[2] = {
808 IXP425_UART0_HWBASE, IXP425_UART1_HWBASE
809 };
810
811 if (consinit_called != 0)
812 return;
813
814 consinit_called = 1;
815
816 pmap_devmap_register(nslu2_devmap);
817
818 if (comcnattach(&ixp425_a4x_bs_tag, addrs[comcnunit],
819 comcnspeed, IXP425_UART_FREQ, COM_TYPE_PXA2x0, comcnmode))
820 panic("can't init serial console (UART%d)", comcnunit);
821 }
822