1 /* $NetBSD: ixdp425_machdep.c,v 1.47 2023/10/12 11:33:38 skrll Exp $ */
2 /*
3 * Copyright (c) 2003
4 * Ichiro FUKUHARA <ichiro@ichiro.org>.
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 ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR
20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28 /*
29 * Copyright (c) 1997,1998 Mark Brinicombe.
30 * Copyright (c) 1997,1998 Causality Limited.
31 * All rights reserved.
32 *
33 * Redistribution and use in source and binary forms, with or without
34 * modification, are permitted provided that the following conditions
35 * are met:
36 * 1. Redistributions of source code must retain the above copyright
37 * notice, this list of conditions and the following disclaimer.
38 * 2. Redistributions in binary form must reproduce the above copyright
39 * notice, this list of conditions and the following disclaimer in the
40 * documentation and/or other materials provided with the distribution.
41 * 3. All advertising materials mentioning features or use of this software
42 * must display the following acknowledgement:
43 * This product includes software developed by Mark Brinicombe
44 * for the NetBSD Project.
45 * 4. The name of the company nor the name of the author may be used to
46 * endorse or promote products derived from this software without specific
47 * prior written permission.
48 *
49 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
50 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
51 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
52 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
53 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
54 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
55 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
59 * SUCH DAMAGE.
60 */
61
62 /* Machine dependent functions for kernel setup for Intel IXP425 evaluation
63 * boards using RedBoot firmware.
64 */
65
66 #include <sys/cdefs.h>
67 __KERNEL_RCSID(0, "$NetBSD: ixdp425_machdep.c,v 1.47 2023/10/12 11:33:38 skrll Exp $");
68
69 #include "opt_arm_debug.h"
70 #include "opt_console.h"
71 #include "opt_ddb.h"
72 #include "opt_kgdb.h"
73
74 #include <sys/param.h>
75 #include <sys/device.h>
76 #include <sys/systm.h>
77 #include <sys/kernel.h>
78 #include <sys/exec.h>
79 #include <sys/proc.h>
80 #include <sys/msgbuf.h>
81 #include <sys/reboot.h>
82 #include <sys/termios.h>
83 #include <sys/ksyms.h>
84 #include <sys/bus.h>
85 #include <sys/cpu.h>
86
87 #include <uvm/uvm_extern.h>
88
89 #include <dev/cons.h>
90
91 #include <machine/db_machdep.h>
92 #include <ddb/db_sym.h>
93 #include <ddb/db_extern.h>
94
95 #include <machine/bootconfig.h>
96 #include <arm/locore.h>
97 #include <arm/undefined.h>
98
99 #include <arm/arm32/machdep.h>
100
101 #include <arm/xscale/ixp425reg.h>
102 #include <arm/xscale/ixp425var.h>
103 #include <arm/xscale/ixp425_sipvar.h>
104
105 #include <evbarm/ixdp425/ixdp425reg.h>
106
107 #include "com.h"
108 #if NCOM > 0
109 #include <dev/ic/comreg.h>
110 #include <dev/ic/comvar.h>
111 #endif
112
113 #include "ksyms.h"
114
115 /* Kernel text starts 2MB in from the bottom of the kernel address space. */
116 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000)
117 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000)
118
119 /*
120 * The range 0xc1000000 - 0xccffffff is available for kernel VM space
121 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff
122 */
123 #define KERNEL_VM_SIZE 0x0C000000
124
125 BootConfig bootconfig; /* Boot config storage */
126 char *boot_args = NULL;
127 char *boot_file = NULL;
128
129 vaddr_t physical_start;
130 vaddr_t physical_freestart;
131 vaddr_t physical_freeend;
132 vaddr_t physical_end;
133 u_int free_pages;
134
135 /* Physical and virtual addresses for some global pages */
136 pv_addr_t minidataclean;
137
138 paddr_t msgbufphys;
139
140 extern int end;
141
142 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */
143
144 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */
145 #define KERNEL_PT_KERNEL_NUM 4
146 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM)
147 /* L2 tables for mapping kernel VM */
148 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1)
149 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */
150 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM)
151
152 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS];
153
154 /* Prototypes */
155
156 void consinit(void);
157 u_int cpu_get_control(void);
158
159 /*
160 * Define the default console speed for the board. This is generally
161 * what the firmware provided with the board defaults to.
162 */
163 #ifndef CONSPEED
164 #define CONSPEED B115200
165 #endif /* ! CONSPEED */
166
167 #ifndef CONUNIT
168 #define CONUNIT 0
169 #endif
170
171 #ifndef CONMODE
172 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */
173 #endif
174
175 int comcnspeed = CONSPEED;
176 int comcnmode = CONMODE;
177 int comcnunit = CONUNIT;
178
179 #if KGDB
180 #ifndef KGDB_DEVNAME
181 #error Must define KGDB_DEVNAME
182 #endif
183 const char kgdb_devname[] = KGDB_DEVNAME;
184
185 #ifndef KGDB_DEVADDR
186 #error Must define KGDB_DEVADDR
187 #endif
188 unsigned long kgdb_devaddr = KGDB_DEVADDR;
189
190 #ifndef KGDB_DEVRATE
191 #define KGDB_DEVRATE CONSPEED
192 #endif
193 int kgdb_devrate = KGDB_DEVRATE;
194
195 #ifndef KGDB_DEVMODE
196 #define KGDB_DEVMODE CONMODE
197 #endif
198 int kgdb_devmode = KGDB_DEVMODE;
199 #endif /* KGDB */
200
201 /*
202 * void cpu_reboot(int howto, char *bootstr)
203 *
204 * Reboots the system
205 *
206 * Deal with any syncing, unmounting, dumping and shutdown hooks,
207 * then reset the CPU.
208 */
209 void
cpu_reboot(int howto,char * bootstr)210 cpu_reboot(int howto, char *bootstr)
211 {
212 uint32_t reg;
213
214 #ifdef DIAGNOSTIC
215 /* info */
216 printf("boot: howto=%08x curproc=%p\n", howto, curproc);
217 #endif
218
219 /*
220 * If we are still cold then hit the air brakes
221 * and crash to earth fast
222 */
223 if (cold) {
224 doshutdownhooks();
225 pmf_system_shutdown(boothowto);
226 printf("The operating system has halted.\n");
227 printf("Please press any key to reboot.\n\n");
228 cngetc();
229 printf("rebooting...\n");
230 goto reset;
231 }
232
233 /* Disable console buffering */
234
235 /*
236 * If RB_NOSYNC was not specified sync the discs.
237 * Note: Unless cold is set to 1 here, syslogd will die during the
238 * unmount. It looks like syslogd is getting woken up only to find
239 * that it cannot page part of the binary in as the filesystem has
240 * been unmounted.
241 */
242 if (!(howto & RB_NOSYNC))
243 bootsync();
244
245 /* Say NO to interrupts */
246 splhigh();
247
248 /* Do a dump if requested. */
249 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP)
250 dumpsys();
251
252 /* Run any shutdown hooks */
253 doshutdownhooks();
254
255 pmf_system_shutdown(boothowto);
256
257 /* Make sure IRQ's are disabled */
258 IRQdisable;
259
260 if (howto & RB_HALT) {
261 printf("The operating system has halted.\n");
262 printf("Please press any key to reboot.\n\n");
263 cngetc();
264 }
265
266 printf("rebooting...\n\r");
267 reset:
268 /*
269 * Make really really sure that all interrupts are disabled,
270 */
271 (void) disable_interrupts(I32_bit|F32_bit);
272 IXPREG(IXP425_INT_ENABLE) = 0;
273
274 /*
275 * Map the boot Flash device down at physical address 0.
276 * This is safe since NetBSD runs out of an alias of
277 * SDRAM at 0x10000000.
278 */
279 reg = EXP_CSR_READ_4(ixpsip_softc, EXP_CNFG0_OFFSET);
280 reg |= EXP_CNFG0_MEM_MAP;
281 EXP_CSR_WRITE_4(ixpsip_softc, EXP_CNFG0_OFFSET, reg);
282
283 /*
284 * Jump into the bootcode's reset vector
285 *
286 * XXX:
287 * Redboot doesn't like the state in which we leave the PCI
288 * ethernet card, and so fails to detect it on reboot. This
289 * pretty much necessitates a hard reset/power cycle to be
290 * able to download a new kernel image over ethernet.
291 *
292 * I suspect this is due to a bug in Redboot's i82557 driver.
293 */
294 cpu_reset();
295
296 /* ...and if that didn't work, just croak. */
297 printf("RESET FAILED!\n");
298 for (;;);
299 }
300
301 /* Static device mappings. */
302 static const struct pmap_devmap ixp425_devmap[] = {
303 /* Physical/Virtual address for I/O space */
304 {
305 IXP425_IO_VBASE,
306 IXP425_IO_HWBASE,
307 IXP425_IO_SIZE,
308 VM_PROT_READ|VM_PROT_WRITE,
309 PTE_NOCACHE,
310 },
311
312 /* Expansion Bus */
313 {
314 IXP425_EXP_VBASE,
315 IXP425_EXP_HWBASE,
316 IXP425_EXP_SIZE,
317 VM_PROT_READ|VM_PROT_WRITE,
318 PTE_NOCACHE,
319 },
320
321 /* IXP425 PCI Configuration */
322 {
323 IXP425_PCI_VBASE,
324 IXP425_PCI_HWBASE,
325 IXP425_PCI_SIZE,
326 VM_PROT_READ|VM_PROT_WRITE,
327 PTE_NOCACHE,
328 },
329
330 /* SDRAM Controller */
331 {
332 IXP425_MCU_VBASE,
333 IXP425_MCU_HWBASE,
334 IXP425_MCU_SIZE,
335 VM_PROT_READ|VM_PROT_WRITE,
336 PTE_NOCACHE,
337 },
338
339 /* PCI Memory Space */
340 {
341 IXP425_PCI_MEM_VBASE,
342 IXP425_PCI_MEM_HWBASE,
343 IXP425_PCI_MEM_SIZE,
344 VM_PROT_READ|VM_PROT_WRITE,
345 PTE_NOCACHE,
346 },
347
348 {
349 0,
350 0,
351 0,
352 0,
353 0,
354 }
355 };
356
357 /*
358 * vaddr_t initarm(...)
359 *
360 * Initial entry point on startup. This gets called before main() is
361 * entered.
362 * It should be responsible for setting up everything that must be
363 * in place when main is called.
364 * This includes
365 * Taking a copy of the boot configuration structure.
366 * Initialising the physical console so characters can be printed.
367 * Setting up page tables for the kernel
368 * Relocating the kernel to the bottom of physical memory
369 */
370 vaddr_t
initarm(void * arg)371 initarm(void *arg)
372 {
373 int loop;
374 int loop1;
375 u_int kerneldatasize;
376 u_int l1pagetable;
377 u_int freemempos;
378
379 /*
380 * Since we map v0xf0000000 == p0xc8000000, it's possible for
381 * us to initialize the console now.
382 */
383 consinit();
384
385 #ifdef VERBOSE_INIT_ARM
386 /* Talk to the user */
387 printf("\nNetBSD/evbarm (Intel IXDP425) booting ...\n");
388 #endif
389
390 /*
391 * Heads up ... Setup the CPU / MMU / TLB functions
392 */
393 if (set_cpufuncs())
394 panic("cpu not recognized!");
395
396 /* XXX overwrite bootconfig to hardcoded values */
397 bootconfig.dramblocks = 1;
398 bootconfig.dram[0].address = 0x10000000;
399 bootconfig.dram[0].pages = ixp425_sdram_size() / PAGE_SIZE;
400
401 kerneldatasize = (uint32_t)&end - (uint32_t)KERNEL_TEXT_BASE;
402
403 #ifdef VERBOSE_INIT_ARM
404 printf("kernsize=0x%x\n", kerneldatasize);
405 #endif
406 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8;
407
408 /*
409 * Set up the variables that define the availability of
410 * physical memory. For now, we're going to set
411 * physical_freestart to 0x10200000 (where the kernel
412 * was loaded), and allocate the memory we need downwards.
413 * If we get too close to the L1 table that we set up, we
414 * will panic. We will update physical_freestart and
415 * physical_freeend later to reflect what pmap_bootstrap()
416 * wants to see.
417 *
418 * XXX pmap_bootstrap() needs an enema.
419 */
420 physical_start = bootconfig.dram[0].address;
421 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE);
422
423 physical_freestart = physical_start
424 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize;
425 physical_freeend = physical_end;
426
427 physmem = (physical_end - physical_start) / PAGE_SIZE;
428
429 /* Tell the user about the memory */
430 #ifdef VERBOSE_INIT_ARM
431 printf("physmemory: %"PRIuPSIZE" pages at 0x%08lx -> 0x%08lx\n", physmem,
432 physical_start, physical_end - 1);
433
434 printf("Allocating page tables\n");
435 #endif
436 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;
437
438 freemempos = 0x10000000;
439
440 #ifdef VERBOSE_INIT_ARM
441 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n",
442 physical_start, physical_end);
443 #endif
444
445 /* Define a macro to simplify memory allocation */
446 #define valloc_pages(var, np) \
447 alloc_pages((var).pv_pa, (np)); \
448 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;
449
450 #if 0
451 #define alloc_pages(var, np) \
452 physical_freeend -= ((np) * PAGE_SIZE); \
453 if (physical_freeend < physical_freestart) \
454 panic("initarm: out of memory"); \
455 (var) = physical_freeend; \
456 free_pages -= (np); \
457 memset((char *)(var), 0, ((np) * PAGE_SIZE));
458 #else
459 #define alloc_pages(var, np) \
460 (var) = freemempos; \
461 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \
462 freemempos += (np) * PAGE_SIZE;
463 #endif
464
465 loop1 = 0;
466 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
467 /* Are we 16KB aligned for an L1 ? */
468 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0
469 && kernel_l1pt.pv_pa == 0) {
470 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
471 } else {
472 valloc_pages(kernel_pt_table[loop1],
473 L2_TABLE_SIZE / PAGE_SIZE);
474 ++loop1;
475 }
476 }
477
478 /* This should never be able to happen but better confirm that. */
479 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0)
480 panic("initarm: Failed to align the kernel page directory");
481
482 /*
483 * Allocate a page for the system page.
484 * This page will just contain the system vectors and can be
485 * shared by all processes.
486 */
487 alloc_pages(systempage.pv_pa, 1);
488
489 /* Allocate stacks for all modes */
490 valloc_pages(irqstack, IRQ_STACK_SIZE);
491 valloc_pages(abtstack, ABT_STACK_SIZE);
492 valloc_pages(undstack, UND_STACK_SIZE);
493 valloc_pages(kernelstack, UPAGES);
494
495 /* Allocate enough pages for cleaning the Mini-Data cache. */
496 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE);
497 valloc_pages(minidataclean, 1);
498
499 #ifdef VERBOSE_INIT_ARM
500 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa,
501 irqstack.pv_va);
502 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa,
503 abtstack.pv_va);
504 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa,
505 undstack.pv_va);
506 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa,
507 kernelstack.pv_va);
508 #endif
509
510 /*
511 * XXX Defer this to later so that we can reclaim the memory
512 * XXX used by the RedBoot page tables.
513 */
514 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);
515
516 /*
517 * Ok we have allocated physical pages for the primary kernel
518 * page tables
519 */
520
521 #ifdef VERBOSE_INIT_ARM
522 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa);
523 #endif
524
525 /*
526 * Now we start construction of the L1 page table
527 * We start by mapping the L2 page tables into the L1.
528 * This means that we can replace L1 mappings later on if necessary
529 */
530 l1pagetable = kernel_l1pt.pv_pa;
531
532 /* Map the L2 pages tables in the L1 page table */
533 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1),
534 &kernel_pt_table[KERNEL_PT_SYS]);
535 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++)
536 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000,
537 &kernel_pt_table[KERNEL_PT_KERNEL + loop]);
538 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++)
539 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
540 &kernel_pt_table[KERNEL_PT_VMDATA + loop]);
541
542 /* update the top of the kernel VM */
543 pmap_curmaxkvaddr =
544 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);
545
546 pmap_link_l2pt(l1pagetable, IXP425_IO_VBASE,
547 &kernel_pt_table[KERNEL_PT_IO]);
548
549 #ifdef VERBOSE_INIT_ARM
550 printf("Mapping kernel\n");
551 #endif
552
553 /* Now we fill in the L2 pagetable for the kernel static code/data */
554 {
555 extern char etext[], _end[];
556 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE;
557 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE;
558 u_int logical;
559
560 textsize = (textsize + PGOFSET) & ~PGOFSET;
561 totalsize = (totalsize + PGOFSET) & ~PGOFSET;
562
563 logical = 0x00200000; /* offset of kernel in RAM */
564
565 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
566 physical_start + logical, textsize,
567 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
568 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
569 physical_start + logical, totalsize - textsize,
570 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
571 }
572
573 #ifdef VERBOSE_INIT_ARM
574 printf("Constructing L2 page tables\n");
575 #endif
576
577 /* Map the stack pages */
578 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
579 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
580 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
581 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
582 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
583 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
584 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
585 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
586
587 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
588 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
589
590 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
591 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
592 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
593 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
594 }
595
596 /* Map the Mini-Data cache clean area. */
597 xscale_setup_minidata(l1pagetable, minidataclean.pv_va,
598 minidataclean.pv_pa);
599
600 /* Map the vector page. */
601 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
602 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
603
604 /*
605 * Map the IXP425 registers
606 */
607 pmap_devmap_bootstrap(l1pagetable, ixp425_devmap);
608
609 /*
610 * Give the XScale global cache clean code an appropriately
611 * sized chunk of unmapped VA space starting at 0xff000000
612 * (our device mappings end before this address).
613 */
614 xscale_cache_clean_addr = 0xff000000U;
615
616 /*
617 * Now we have the real page tables in place so we can switch to them.
618 * Once this is done we will be running with the REAL kernel page
619 * tables.
620 */
621
622 /*
623 * Update the physical_freestart/physical_freeend/free_pages
624 * variables.
625 */
626 {
627 extern char _end[];
628
629 physical_freestart = physical_start +
630 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) -
631 KERNEL_BASE);
632 physical_freeend = physical_end;
633 free_pages =
634 (physical_freeend - physical_freestart) / PAGE_SIZE;
635 }
636
637 /* Switch tables */
638 #ifdef VERBOSE_INIT_ARM
639 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
640 physical_freestart, free_pages, free_pages);
641 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa);
642 #endif
643 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
644 cpu_setttb(kernel_l1pt.pv_pa, true);
645 cpu_tlb_flushID();
646 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
647
648 /*
649 * Moved from cpu_startup() as data_abort_handler() references
650 * this during uvm init
651 */
652 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);
653
654 #ifdef VERBOSE_INIT_ARM
655 printf("bootstrap done.\n");
656 #endif
657
658 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
659
660 /*
661 * Pages were allocated during the secondary bootstrap for the
662 * stacks for different CPU modes.
663 * We must now set the r13 registers in the different CPU modes to
664 * point to these stacks.
665 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
666 * of the stack memory.
667 */
668 #ifdef VERBOSE_INIT_ARM
669 printf("init subsystems: stacks ");
670 #endif
671
672 set_stackptr(PSR_IRQ32_MODE,
673 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
674 set_stackptr(PSR_ABT32_MODE,
675 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
676 set_stackptr(PSR_UND32_MODE,
677 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
678
679 /*
680 * Well we should set a data abort handler.
681 * Once things get going this will change as we will need a proper
682 * handler.
683 * Until then we will use a handler that just panics but tells us
684 * why.
685 * Initialisation of the vectors will just panic on a data abort.
686 * This just fills in a slightly better one.
687 */
688 #ifdef VERBOSE_INIT_ARM
689 printf("vectors ");
690 #endif
691 data_abort_handler_address = (u_int)data_abort_handler;
692 prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
693 undefined_handler_address = (u_int)undefinedinstruction_bounce;
694
695 /* Initialise the undefined instruction handlers */
696 #ifdef VERBOSE_INIT_ARM
697 printf("undefined ");
698 #endif
699 undefined_init();
700
701 /* Load memory into UVM. */
702 #ifdef VERBOSE_INIT_ARM
703 printf("page ");
704 #endif
705 uvm_md_init();
706 uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
707 atop(physical_freestart), atop(physical_freeend),
708 VM_FREELIST_DEFAULT);
709
710 /* Boot strap pmap telling it where managed kernel virtual memory is */
711 #ifdef VERBOSE_INIT_ARM
712 printf("pmap ");
713 #endif
714 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);
715
716 /* Setup the IRQ system */
717 #ifdef VERBOSE_INIT_ARM
718 printf("irq ");
719 #endif
720 ixp425_intr_init();
721 #ifdef VERBOSE_INIT_ARM
722 printf("\nAll initialization done!\nNow Starting NetBSD, Here we go!\n");
723 #endif
724
725 #ifdef BOOTHOWTO
726 boothowto = BOOTHOWTO;
727 #endif
728
729 #ifdef DDB
730 db_machine_init();
731 if (boothowto & RB_KDB)
732 Debugger();
733 #endif
734
735 /* We return the new stack pointer address */
736 return kernelstack.pv_va + USPACE_SVC_STACK_TOP;
737 }
738
739 /*
740 * consinit
741 */
742 void
consinit(void)743 consinit(void)
744 {
745 static int consinit_called;
746 static const bus_addr_t addrs[2] = {
747 IXP425_UART0_HWBASE, IXP425_UART1_HWBASE
748 };
749
750 if (consinit_called != 0)
751 return;
752
753 consinit_called = 1;
754
755 pmap_devmap_register(ixp425_devmap);
756
757 if (comcnattach(&ixp425_a4x_bs_tag, addrs[comcnunit],
758 comcnspeed, IXP425_UART_FREQ, COM_TYPE_PXA2x0, comcnmode))
759 panic("can't init serial console (UART%d)", comcnunit);
760 }
761