1 /* $NetBSD: iq80321_machdep.c,v 1.66 2023/10/12 11:33:38 skrll Exp $ */
2
3 /*
4 * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Jason R. Thorpe and Steve C. Woodford for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed for the NetBSD Project by
20 * Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 * or promote products derived from this software without specific prior
23 * written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 /*
39 * Copyright (c) 1997,1998 Mark Brinicombe.
40 * Copyright (c) 1997,1998 Causality Limited.
41 * All rights reserved.
42 *
43 * Redistribution and use in source and binary forms, with or without
44 * modification, are permitted provided that the following conditions
45 * are met:
46 * 1. Redistributions of source code must retain the above copyright
47 * notice, this list of conditions and the following disclaimer.
48 * 2. Redistributions in binary form must reproduce the above copyright
49 * notice, this list of conditions and the following disclaimer in the
50 * documentation and/or other materials provided with the distribution.
51 * 3. All advertising materials mentioning features or use of this software
52 * must display the following acknowledgement:
53 * This product includes software developed by Mark Brinicombe
54 * for the NetBSD Project.
55 * 4. The name of the company nor the name of the author may be used to
56 * endorse or promote products derived from this software without specific
57 * prior written permission.
58 *
59 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
60 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
61 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
62 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
63 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
64 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
65 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
69 * SUCH DAMAGE.
70 *
71 * Machine dependent functions for kernel setup for Intel IQ80321 evaluation
72 * boards using RedBoot firmware.
73 */
74
75 #include <sys/cdefs.h>
76 __KERNEL_RCSID(0, "$NetBSD: iq80321_machdep.c,v 1.66 2023/10/12 11:33:38 skrll Exp $");
77
78 #include "opt_console.h"
79 #include "opt_ddb.h"
80 #include "opt_kgdb.h"
81
82 #include <sys/param.h>
83 #include <sys/device.h>
84 #include <sys/systm.h>
85 #include <sys/kernel.h>
86 #include <sys/exec.h>
87 #include <sys/proc.h>
88 #include <sys/msgbuf.h>
89 #include <sys/reboot.h>
90 #include <sys/termios.h>
91 #include <sys/ksyms.h>
92 #include <sys/cpu.h>
93 #include <sys/bus.h>
94
95 #include <uvm/uvm_extern.h>
96
97 #include <dev/cons.h>
98
99 #include <dev/pci/ppbreg.h>
100
101 #include <machine/db_machdep.h>
102 #include <ddb/db_sym.h>
103 #include <ddb/db_extern.h>
104
105 #include <machine/bootconfig.h>
106
107 #include <arm/locore.h>
108 #include <arm/undefined.h>
109
110 #include <arm/arm32/machdep.h>
111
112 #include <arm/xscale/i80321reg.h>
113 #include <arm/xscale/i80321var.h>
114
115 #include <evbarm/iq80321/iq80321reg.h>
116 #include <evbarm/iq80321/iq80321var.h>
117 #include <evbarm/iq80321/obiovar.h>
118
119 #include "ksyms.h"
120
121 /* Kernel text starts 2MB in from the bottom of the kernel address space. */
122 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000)
123 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000)
124
125 /*
126 * The range 0xc1000000 - 0xccffffff is available for kernel VM space
127 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff
128 */
129 #define KERNEL_VM_SIZE 0x0C000000
130
131 BootConfig bootconfig; /* Boot config storage */
132 char *boot_args = NULL;
133 char *boot_file = NULL;
134
135 vaddr_t physical_start;
136 vaddr_t physical_freestart;
137 vaddr_t physical_freeend;
138 vaddr_t physical_end;
139 u_int free_pages;
140
141 /*int debug_flags;*/
142 #ifndef PMAP_STATIC_L1S
143 int max_processes = 64; /* Default number */
144 #endif /* !PMAP_STATIC_L1S */
145
146 /* Physical and virtual addresses for some global pages */
147 pv_addr_t minidataclean;
148
149 paddr_t msgbufphys;
150
151 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */
152
153 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */
154 #define KERNEL_PT_KERNEL_NUM 4
155
156 /* L2 table for mapping i80321 */
157 #define KERNEL_PT_IOPXS (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM)
158
159 /* L2 tables for mapping kernel VM */
160 #define KERNEL_PT_VMDATA (KERNEL_PT_IOPXS + 1)
161 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */
162 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM)
163
164 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS];
165
166 /* Prototypes */
167
168 void consinit(void);
169
170 #include "com.h"
171 #if NCOM > 0
172 #include <dev/ic/comreg.h>
173 #include <dev/ic/comvar.h>
174 #endif
175
176 /*
177 * Define the default console speed for the board. This is generally
178 * what the firmware provided with the board defaults to.
179 */
180 #ifndef CONSPEED
181 #define CONSPEED B115200
182 #endif /* ! CONSPEED */
183
184 #ifndef CONUNIT
185 #define CONUNIT 0
186 #endif
187
188 #ifndef CONMODE
189 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
190 #endif
191
192 int comcnspeed = CONSPEED;
193 int comcnmode = CONMODE;
194 int comcnunit = CONUNIT;
195
196 #if KGDB
197 #ifndef KGDB_DEVNAME
198 #error Must define KGDB_DEVNAME
199 #endif
200 const char kgdb_devname[] = KGDB_DEVNAME;
201
202 #ifndef KGDB_DEVADDR
203 #error Must define KGDB_DEVADDR
204 #endif
205 unsigned long kgdb_devaddr = KGDB_DEVADDR;
206
207 #ifndef KGDB_DEVRATE
208 #define KGDB_DEVRATE CONSPEED
209 #endif
210 int kgdb_devrate = KGDB_DEVRATE;
211
212 #ifndef KGDB_DEVMODE
213 #define KGDB_DEVMODE CONMODE
214 #endif
215 int kgdb_devmode = KGDB_DEVMODE;
216 #endif /* KGDB */
217
218 #if defined(I80321_REBOOT)
219 extern void I80321_REBOOT(int);
220 #endif
221
222 /*
223 * void cpu_reboot(int howto, char *bootstr)
224 *
225 * Reboots the system
226 *
227 * Deal with any syncing, unmounting, dumping and shutdown hooks,
228 * then reset the CPU.
229 */
230 void
cpu_reboot(int howto,char * bootstr)231 cpu_reboot(int howto, char *bootstr)
232 {
233
234 /*
235 * If we are still cold then hit the air brakes
236 * and crash to earth fast
237 */
238 if (cold) {
239 doshutdownhooks();
240 pmf_system_shutdown(boothowto);
241 printf("The operating system has halted.\n");
242 printf("Please press any key to reboot.\n\n");
243 cngetc();
244 printf("rebooting...\n");
245 goto reset;
246 }
247
248 /* Disable console buffering */
249
250 /*
251 * If RB_NOSYNC was not specified sync the discs.
252 * Note: Unless cold is set to 1 here, syslogd will die during the
253 * unmount. It looks like syslogd is getting woken up only to find
254 * that it cannot page part of the binary in as the filesystem has
255 * been unmounted.
256 */
257 if (!(howto & RB_NOSYNC))
258 bootsync();
259
260 /* Say NO to interrupts */
261 splhigh();
262
263 /* Do a dump if requested. */
264 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP)
265 dumpsys();
266
267 /* Run any shutdown hooks */
268 doshutdownhooks();
269
270 pmf_system_shutdown(boothowto);
271
272 /* Make sure IRQ's are disabled */
273 IRQdisable;
274
275 if (howto & RB_HALT) {
276 #if defined(I80321_REBOOT)
277 I80321_REBOOT(howto);
278 #endif
279 iq80321_7seg('.', '.');
280 printf("The operating system has halted.\n");
281 printf("Please press any key to reboot.\n\n");
282 cngetc();
283 }
284
285 printf("rebooting...\n\r");
286 reset:
287 #if defined(I80321_REBOOT)
288 I80321_REBOOT(howto);
289 #endif
290
291 /*
292 * Make really really sure that all interrupts are disabled,
293 * and poke the Internal Bus and Peripheral Bus reset lines.
294 */
295 (void) disable_interrupts(I32_bit|F32_bit);
296 *(volatile uint32_t *)(IQ80321_80321_VBASE + VERDE_ATU_BASE +
297 ATU_PCSR) = PCSR_RIB | PCSR_RPB;
298
299 /* ...and if that didn't work, just croak. */
300 printf("RESET FAILED!\n");
301 for (;;);
302 }
303
304 /* Static device mappings. */
305 static const struct pmap_devmap iq80321_devmap[] = {
306 /*
307 * Map the on-board devices VA == PA so that we can access them
308 * with the MMU on or off.
309 */
310 DEVMAP_ENTRY(
311 IQ80321_OBIO_BASE,
312 IQ80321_OBIO_BASE,
313 IQ80321_OBIO_SIZE
314 ),
315
316 DEVMAP_ENTRY(
317 IQ80321_IOW_VBASE,
318 VERDE_OUT_XLATE_IO_WIN0_BASE,
319 VERDE_OUT_XLATE_IO_WIN_SIZE
320 ),
321
322 DEVMAP_ENTRY(
323 IQ80321_80321_VBASE,
324 VERDE_PMMR_BASE,
325 VERDE_PMMR_SIZE
326 ),
327
328 DEVMAP_ENTRY_END
329 };
330
331 static void
iq80321_hardclock_hook(void)332 iq80321_hardclock_hook(void)
333 {
334 static int snakefreq;
335
336 if ((snakefreq++ & 15) == 0)
337 iq80321_7seg_snake();
338 }
339
340 /*
341 * vaddr_t initarm(...)
342 *
343 * Initial entry point on startup. This gets called before main() is
344 * entered.
345 * It should be responsible for setting up everything that must be
346 * in place when main is called.
347 * This includes
348 * Taking a copy of the boot configuration structure.
349 * Initialising the physical console so characters can be printed.
350 * Setting up page tables for the kernel
351 * Relocating the kernel to the bottom of physical memory
352 */
353 vaddr_t
initarm(void * arg)354 initarm(void *arg)
355 {
356 int loop;
357 int loop1;
358 u_int l1pagetable;
359 paddr_t memstart;
360 psize_t memsize;
361
362 /*
363 * Clear out the 7-segment display. Whee, the first visual
364 * indication that we're running kernel code.
365 */
366 iq80321_7seg(' ', ' ');
367
368 /* Calibrate the delay loop. */
369 i80321_calibrate_delay();
370 i80321_hardclock_hook = iq80321_hardclock_hook;
371
372 /*
373 * Since we map the on-board devices VA==PA, and the kernel
374 * is running VA==PA, it's possible for us to initialize
375 * the console now.
376 */
377 consinit();
378
379 #ifdef VERBOSE_INIT_ARM
380 /* Talk to the user */
381 printf("\nNetBSD/evbarm (IQ80321) booting ...\n");
382 #endif
383
384 /*
385 * Heads up ... Setup the CPU / MMU / TLB functions
386 */
387 if (set_cpufuncs())
388 panic("CPU not recognized!");
389
390 /*
391 * We are currently running with the MMU enabled and the
392 * entire address space mapped VA==PA, except for the
393 * first 64M of RAM is also double-mapped at 0xc0000000.
394 * There is an L1 page table at 0xa0004000.
395 */
396
397 /*
398 * Fetch the SDRAM start/size from the i80321 SDRAM configuration
399 * registers.
400 */
401 i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE,
402 &memstart, &memsize);
403
404 #ifdef VERBOSE_INIT_ARM
405 printf("initarm: Configuring system ...\n");
406 #endif
407
408 /* Fake bootconfig structure for the benefit of pmap.c */
409 /* XXX must make the memory description h/w independent */
410 bootconfig.dramblocks = 1;
411 bootconfig.dram[0].address = memstart;
412 bootconfig.dram[0].pages = memsize / PAGE_SIZE;
413
414 /*
415 * Set up the variables that define the availability of
416 * physical memory. For now, we're going to set
417 * physical_freestart to 0xa0200000 (where the kernel
418 * was loaded), and allocate the memory we need downwards.
419 * If we get too close to the L1 table that we set up, we
420 * will panic. We will update physical_freestart and
421 * physical_freeend later to reflect what pmap_bootstrap()
422 * wants to see.
423 *
424 * XXX pmap_bootstrap() needs an enema.
425 */
426 physical_start = bootconfig.dram[0].address;
427 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE);
428
429 physical_freestart = 0xa0009000UL;
430 physical_freeend = 0xa0200000UL;
431
432 physmem = (physical_end - physical_start) / PAGE_SIZE;
433
434 #ifdef VERBOSE_INIT_ARM
435 /* Tell the user about the memory */
436 printf("physmemory: %"PRIuPSIZE" pages at 0x%08lx -> 0x%08lx\n",
437 physmem, physical_start, physical_end - 1);
438 #endif
439
440 /*
441 * Okay, the kernel starts 2MB in from the bottom of physical
442 * memory. We are going to allocate our bootstrap pages downwards
443 * from there.
444 *
445 * We need to allocate some fixed page tables to get the kernel
446 * going. We allocate one page directory and a number of page
447 * tables and store the physical addresses in the kernel_pt_table
448 * array.
449 *
450 * The kernel page directory must be on a 16K boundary. The page
451 * tables must be on 4K boundaries. What we do is allocate the
452 * page directory on the first 16K boundary that we encounter, and
453 * the page tables on 4K boundaries otherwise. Since we allocate
454 * at least 3 L2 page tables, we are guaranteed to encounter at
455 * least one 16K aligned region.
456 */
457
458 #ifdef VERBOSE_INIT_ARM
459 printf("Allocating page tables\n");
460 #endif
461
462 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;
463
464 #ifdef VERBOSE_INIT_ARM
465 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n",
466 physical_freestart, free_pages, free_pages);
467 #endif
468
469 /* Define a macro to simplify memory allocation */
470 #define valloc_pages(var, np) \
471 alloc_pages((var).pv_pa, (np)); \
472 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;
473
474 #define alloc_pages(var, np) \
475 physical_freeend -= ((np) * PAGE_SIZE); \
476 if (physical_freeend < physical_freestart) \
477 panic("initarm: out of memory"); \
478 (var) = physical_freeend; \
479 free_pages -= (np); \
480 memset((char *)(var), 0, ((np) * PAGE_SIZE));
481
482 loop1 = 0;
483 kernel_l1pt.pv_pa = 0;
484 kernel_l1pt.pv_va = 0;
485 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
486 /* Are we 16KB aligned for an L1 ? */
487 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0
488 && kernel_l1pt.pv_pa == 0) {
489 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
490 } else {
491 valloc_pages(kernel_pt_table[loop1],
492 L2_TABLE_SIZE / PAGE_SIZE);
493 ++loop1;
494 }
495 }
496
497 /* This should never be able to happen but better confirm that. */
498 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0)
499 panic("initarm: Failed to align the kernel page directory");
500
501 /*
502 * Allocate a page for the system page mapped to V0x00000000
503 * This page will just contain the system vectors and can be
504 * shared by all processes.
505 */
506 alloc_pages(systempage.pv_pa, 1);
507
508 /* Allocate stacks for all modes */
509 valloc_pages(irqstack, IRQ_STACK_SIZE);
510 valloc_pages(abtstack, ABT_STACK_SIZE);
511 valloc_pages(undstack, UND_STACK_SIZE);
512 valloc_pages(kernelstack, UPAGES);
513
514 /* Allocate enough pages for cleaning the Mini-Data cache. */
515 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE);
516 valloc_pages(minidataclean, 1);
517
518 #ifdef VERBOSE_INIT_ARM
519 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa,
520 irqstack.pv_va);
521 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa,
522 abtstack.pv_va);
523 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa,
524 undstack.pv_va);
525 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa,
526 kernelstack.pv_va);
527 #endif
528
529 /*
530 * XXX Defer this to later so that we can reclaim the memory
531 * XXX used by the RedBoot page tables.
532 */
533 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);
534
535 /*
536 * Ok we have allocated physical pages for the primary kernel
537 * page tables
538 */
539
540 #ifdef VERBOSE_INIT_ARM
541 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa);
542 #endif
543
544 /*
545 * Now we start construction of the L1 page table
546 * We start by mapping the L2 page tables into the L1.
547 * This means that we can replace L1 mappings later on if necessary
548 */
549 l1pagetable = kernel_l1pt.pv_pa;
550
551 /* Map the L2 pages tables in the L1 page table */
552 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1),
553 &kernel_pt_table[KERNEL_PT_SYS]);
554 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++)
555 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000,
556 &kernel_pt_table[KERNEL_PT_KERNEL + loop]);
557 pmap_link_l2pt(l1pagetable, IQ80321_IOPXS_VBASE,
558 &kernel_pt_table[KERNEL_PT_IOPXS]);
559 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++)
560 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
561 &kernel_pt_table[KERNEL_PT_VMDATA + loop]);
562
563 /* update the top of the kernel VM */
564 pmap_curmaxkvaddr =
565 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);
566
567 #ifdef VERBOSE_INIT_ARM
568 printf("Mapping kernel\n");
569 #endif
570
571 /* Now we fill in the L2 pagetable for the kernel static code/data */
572 {
573 extern char etext[], _end[];
574 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE;
575 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE;
576 u_int logical;
577
578 textsize = (textsize + PGOFSET) & ~PGOFSET;
579 totalsize = (totalsize + PGOFSET) & ~PGOFSET;
580
581 logical = 0x00200000; /* offset of kernel in RAM */
582
583 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
584 physical_start + logical, textsize,
585 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
586 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
587 physical_start + logical, totalsize - textsize,
588 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
589 }
590
591 #ifdef VERBOSE_INIT_ARM
592 printf("Constructing L2 page tables\n");
593 #endif
594
595 /* Map the stack pages */
596 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
597 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
598 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
599 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
600 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
601 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
602 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
603 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
604
605 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
606 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
607
608 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
609 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
610 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
611 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
612 }
613
614 /* Map the Mini-Data cache clean area. */
615 xscale_setup_minidata(l1pagetable, minidataclean.pv_va,
616 minidataclean.pv_pa);
617
618 /* Map the vector page. */
619 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
620 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
621
622 /* Map the statically mapped devices. */
623 pmap_devmap_bootstrap(l1pagetable, iq80321_devmap);
624
625 /*
626 * Give the XScale global cache clean code an appropriately
627 * sized chunk of unmapped VA space starting at 0xff000000
628 * (our device mappings end before this address).
629 */
630 xscale_cache_clean_addr = 0xff000000U;
631
632 /*
633 * Now we have the real page tables in place so we can switch to them.
634 * Once this is done we will be running with the REAL kernel page
635 * tables.
636 */
637
638 /*
639 * Update the physical_freestart/physical_freeend/free_pages
640 * variables.
641 */
642 {
643 extern char _end[];
644
645 physical_freestart = physical_start +
646 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) -
647 KERNEL_BASE);
648 physical_freeend = physical_end;
649 free_pages =
650 (physical_freeend - physical_freestart) / PAGE_SIZE;
651 }
652
653 /* Switch tables */
654 #ifdef VERBOSE_INIT_ARM
655 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
656 physical_freestart, free_pages, free_pages);
657 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa);
658 #endif
659 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
660 cpu_setttb(kernel_l1pt.pv_pa, true);
661 cpu_tlb_flushID();
662 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
663
664 /*
665 * Moved from cpu_startup() as data_abort_handler() references
666 * this during uvm init
667 */
668 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);
669
670 #ifdef VERBOSE_INIT_ARM
671 printf("done!\n");
672 #endif
673
674 #ifdef VERBOSE_INIT_ARM
675 printf("bootstrap done.\n");
676 #endif
677
678 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
679
680 /*
681 * Pages were allocated during the secondary bootstrap for the
682 * stacks for different CPU modes.
683 * We must now set the r13 registers in the different CPU modes to
684 * point to these stacks.
685 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
686 * of the stack memory.
687 */
688 #ifdef VERBOSE_INIT_ARM
689 printf("init subsystems: stacks ");
690 #endif
691
692 set_stackptr(PSR_IRQ32_MODE,
693 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
694 set_stackptr(PSR_ABT32_MODE,
695 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
696 set_stackptr(PSR_UND32_MODE,
697 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
698
699 /*
700 * Well we should set a data abort handler.
701 * Once things get going this will change as we will need a proper
702 * handler.
703 * Until then we will use a handler that just panics but tells us
704 * why.
705 * Initialisation of the vectors will just panic on a data abort.
706 * This just fills in a slightly better one.
707 */
708 #ifdef VERBOSE_INIT_ARM
709 printf("vectors ");
710 #endif
711 data_abort_handler_address = (u_int)data_abort_handler;
712 prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
713 undefined_handler_address = (u_int)undefinedinstruction_bounce;
714
715 /* Initialise the undefined instruction handlers */
716 #ifdef VERBOSE_INIT_ARM
717 printf("undefined ");
718 #endif
719 undefined_init();
720
721 /* Load memory into UVM. */
722 #ifdef VERBOSE_INIT_ARM
723 printf("page ");
724 #endif
725 uvm_md_init();
726 uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
727 atop(physical_freestart), atop(physical_freeend),
728 VM_FREELIST_DEFAULT);
729
730 /* Boot strap pmap telling it where managed kernel virtual memory is */
731 #ifdef VERBOSE_INIT_ARM
732 printf("pmap ");
733 #endif
734 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);
735
736 /* Setup the IRQ system */
737 #ifdef VERBOSE_INIT_ARM
738 printf("irq ");
739 #endif
740 i80321_intr_init();
741
742 #ifdef VERBOSE_INIT_ARM
743 printf("done.\n");
744 #endif
745
746 #ifdef BOOTHOWTO
747 boothowto = BOOTHOWTO;
748 #endif
749
750 #ifdef DDB
751 db_machine_init();
752 if (boothowto & RB_KDB)
753 Debugger();
754 #endif
755
756 /* We return the new stack pointer address */
757 return kernelstack.pv_va + USPACE_SVC_STACK_TOP;
758 }
759
760 void
consinit(void)761 consinit(void)
762 {
763 static const bus_addr_t comcnaddrs[] = {
764 IQ80321_UART1, /* com0 */
765 };
766 static int consinit_called;
767
768 if (consinit_called != 0)
769 return;
770
771 consinit_called = 1;
772
773 /*
774 * Console devices are mapped VA==PA. Our devmap reflects
775 * this, so register it now so drivers can map the console
776 * device.
777 */
778 pmap_devmap_register(iq80321_devmap);
779
780 #if NCOM > 0
781 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed,
782 COM_FREQ, COM_TYPE_NORMAL, comcnmode))
783 panic("can't init serial console @%lx", comcnaddrs[comcnunit]);
784 #else
785 panic("serial console @%lx not configured", comcnaddrs[comcnunit]);
786 #endif
787 #if KGDB
788 #if NCOM > 0
789 if (strcmp(kgdb_devname, "com") == 0) {
790 com_kgdb_attach(&obio_bs_tag, kgdb_devaddr, kgdb_devrate,
791 COM_FREQ, COM_TYPE_NORMAL, kgdb_devmode);
792 }
793 #endif /* NCOM > 0 */
794 #endif /* KGDB */
795 }
796