summaryrefslogtreecommitdiffstats
path: root/sys/arm/mv/mv_machdep.c
blob: 10890f7d16d02bf5ab88c198f73f868be41085ad (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
/*-
 * Copyright (c) 1994-1998 Mark Brinicombe.
 * Copyright (c) 1994 Brini.
 * All rights reserved.
 *
 * This code is derived from software written for Brini by Mark Brinicombe
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Brini.
 * 4. The name of the company nor the name of the author may be used to
 *    endorse or promote products derived from this software without specific
 *    prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * from: FreeBSD: //depot/projects/arm/src/sys/arm/at91/kb920x_machdep.c, rev 45
 */

#include "opt_msgbuf.h"
#include "opt_ddb.h"

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#define _ARM32_BUS_DMA_PRIVATE
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sysproto.h>
#include <sys/signalvar.h>
#include <sys/imgact.h>
#include <sys/kernel.h>
#include <sys/ktr.h>
#include <sys/linker.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/pcpu.h>
#include <sys/proc.h>
#include <sys/ptrace.h>
#include <sys/cons.h>
#include <sys/bio.h>
#include <sys/bus.h>
#include <sys/buf.h>
#include <sys/exec.h>
#include <sys/kdb.h>
#include <sys/msgbuf.h>
#include <machine/reg.h>
#include <machine/cpu.h>

#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_object.h>
#include <vm/vm_page.h>
#include <vm/vm_pager.h>
#include <vm/vm_map.h>
#include <machine/pte.h>
#include <machine/pmap.h>
#include <machine/vmparam.h>
#include <machine/pcb.h>
#include <machine/undefined.h>
#include <machine/machdep.h>
#include <machine/metadata.h>
#include <machine/armreg.h>
#include <machine/bus.h>
#include <sys/reboot.h>
#include <machine/bootinfo.h>

#include <arm/mv/mvvar.h>	/* XXX eventually this should be eliminated */
#include <arm/mv/mvwin.h>

#ifdef  DEBUG
#define debugf(fmt, args...) printf(fmt, ##args)
#else
#define debugf(fmt, args...)
#endif

/*
 * This is the number of L2 page tables required for covering max
 * (hypothetical) memsize of 4GB and all kernel mappings (vectors, msgbuf,
 * stacks etc.), uprounded to be divisible by 4.
 */
#define KERNEL_PT_MAX	78

/* Define various stack sizes in pages */
#define IRQ_STACK_SIZE	1
#define ABT_STACK_SIZE	1
#define UND_STACK_SIZE	1

/* Maximum number of memory regions */
#define MEM_REGIONS	8

extern unsigned char kernbase[];
extern unsigned char _etext[];
extern unsigned char _edata[];
extern unsigned char __bss_start[];
extern unsigned char _end[];

extern u_int data_abort_handler_address;
extern u_int prefetch_abort_handler_address;
extern u_int undefined_handler_address;

extern const struct pmap_devmap *pmap_devmap_bootstrap_table;
extern vm_offset_t pmap_bootstrap_lastaddr;

struct pv_addr kernel_pt_table[KERNEL_PT_MAX];

extern int *end;

struct pcpu __pcpu;
struct pcpu *pcpup = &__pcpu;

/* Physical and virtual addresses for some global pages */

vm_paddr_t phys_avail[10];
vm_paddr_t dump_avail[4];
vm_offset_t physical_pages;
vm_offset_t pmap_bootstrap_lastaddr;

const struct pmap_devmap *pmap_devmap_bootstrap_table;
struct pv_addr systempage;
struct pv_addr msgbufpv;
struct pv_addr irqstack;
struct pv_addr undstack;
struct pv_addr abtstack;
struct pv_addr kernelstack;

static struct trapframe proc0_tf;

struct mem_region {
	vm_offset_t	mr_start;
	vm_size_t	mr_size;
};

static struct mem_region availmem_regions[MEM_REGIONS];
static int availmem_regions_sz;

struct bootinfo *bootinfo;

static void print_kenv(void);
static void print_kernel_section_addr(void);
static void print_bootinfo(void);

static void physmap_init(int);

static char *
kenv_next(char *cp)
{

	if (cp != NULL) {
		while (*cp != 0)
			cp++;
		cp++;
		if (*cp == 0)
			cp = NULL;
	}
	return (cp);
}

static void
print_kenv(void)
{
	int len;
	char *cp;

	debugf("loader passed (static) kenv:\n");
	if (kern_envp == NULL) {
		debugf(" no env, null ptr\n");
		return;
	}
	debugf(" kern_envp = 0x%08x\n", (uint32_t)kern_envp);

	len = 0;
	for (cp = kern_envp; cp != NULL; cp = kenv_next(cp))
		debugf(" %x %s\n", (uint32_t)cp, cp);
}

static void
print_bootinfo(void)
{
	struct bi_mem_region *mr;
	struct bi_eth_addr *eth;
	int i, j;

	debugf("bootinfo:\n");
	if (bootinfo == NULL) {
		debugf(" no bootinfo, null ptr\n");
		return;
	}

	debugf(" version = 0x%08x\n", bootinfo->bi_version);
	debugf(" ccsrbar = 0x%08x\n", bootinfo->bi_bar_base);
	debugf(" cpu_clk = 0x%08x\n", bootinfo->bi_cpu_clk);
	debugf(" bus_clk = 0x%08x\n", bootinfo->bi_bus_clk);

	debugf(" mem regions:\n");
	mr = (struct bi_mem_region *)bootinfo->bi_data;
	for (i = 0; i < bootinfo->bi_mem_reg_no; i++, mr++)
		debugf("    #%d, base = 0x%08x, size = 0x%08x\n", i,
		    mr->mem_base, mr->mem_size);

	debugf(" eth addresses:\n");
	eth = (struct bi_eth_addr *)mr;
	for (i = 0; i < bootinfo->bi_eth_addr_no; i++, eth++) {
		debugf("    #%d, addr = ", i);
		for (j = 0; j < 6; j++)
			debugf("%02x ", eth->mac_addr[j]);
		debugf("\n");
	}
}

static void
print_kernel_section_addr(void)
{

	debugf("kernel image addresses:\n");
	debugf(" kernbase       = 0x%08x\n", (uint32_t)kernbase);
	debugf(" _etext (sdata) = 0x%08x\n", (uint32_t)_etext);
	debugf(" _edata         = 0x%08x\n", (uint32_t)_edata);
	debugf(" __bss_start    = 0x%08x\n", (uint32_t)__bss_start);
	debugf(" _end           = 0x%08x\n", (uint32_t)_end);
}

struct bi_mem_region *
bootinfo_mr(void)
{

	return ((struct bi_mem_region *)bootinfo->bi_data);
}

static void
physmap_init(int hardcoded)
{
	int i, j, cnt;
	vm_offset_t phys_kernelend, kernload;
	uint32_t s, e, sz;
	struct mem_region *mp, *mp1;

	phys_kernelend = KERNPHYSADDR + (virtual_avail - KERNVIRTADDR);
	kernload = KERNPHYSADDR;

	/*
	 * Use hardcoded physical addresses if we don't use memory regions
	 * from metadata.
	 */
	if (hardcoded) {
		phys_avail[0] = 0;
		phys_avail[1] = kernload;

		phys_avail[2] = phys_kernelend;
		phys_avail[3] = PHYSMEM_SIZE;

		phys_avail[4] = 0;
		phys_avail[5] = 0;
		return;
	}

	/*
	 * Remove kernel physical address range from avail
	 * regions list. Page align all regions.
	 * Non-page aligned memory isn't very interesting to us.
	 * Also, sort the entries for ascending addresses.
	 */
	sz = 0;
	cnt = availmem_regions_sz;
	debugf("processing avail regions:\n");
	for (mp = availmem_regions; mp->mr_size; mp++) {
		s = mp->mr_start;
		e = mp->mr_start + mp->mr_size;
		debugf(" %08x-%08x -> ", s, e);
		/* Check whether this region holds all of the kernel. */
		if (s < kernload && e > phys_kernelend) {
			availmem_regions[cnt].mr_start = phys_kernelend;
			availmem_regions[cnt++].mr_size = e - phys_kernelend;
			e = kernload;
		}
		/* Look whether this regions starts within the kernel. */
		if (s >= kernload && s < phys_kernelend) {
			if (e <= phys_kernelend)
				goto empty;
			s = phys_kernelend;
		}
		/* Now look whether this region ends within the kernel. */
		if (e > kernload && e <= phys_kernelend) {
			if (s >= kernload) {
				goto empty;
			}
			e = kernload;
		}
		/* Now page align the start and size of the region. */
		s = round_page(s);
		e = trunc_page(e);
		if (e < s)
			e = s;
		sz = e - s;
		debugf("%08x-%08x = %x\n", s, e, sz);

		/* Check whether some memory is left here. */
		if (sz == 0) {
		empty:
			printf("skipping\n");
			bcopy(mp + 1, mp,
			    (cnt - (mp - availmem_regions)) * sizeof(*mp));
			cnt--;
			mp--;
			continue;
		}

		/* Do an insertion sort. */
		for (mp1 = availmem_regions; mp1 < mp; mp1++)
			if (s < mp1->mr_start)
				break;
		if (mp1 < mp) {
			bcopy(mp1, mp1 + 1, (char *)mp - (char *)mp1);
			mp1->mr_start = s;
			mp1->mr_size = sz;
		} else {
			mp->mr_start = s;
			mp->mr_size = sz;
		}
	}
	availmem_regions_sz = cnt;

	/* Fill in phys_avail table, based on availmem_regions */
	debugf("fill in phys_avail:\n");
	for (i = 0, j = 0; i < availmem_regions_sz; i++, j += 2) {

		debugf(" region: 0x%08x - 0x%08x (0x%08x)\n",
		    availmem_regions[i].mr_start,
		    availmem_regions[i].mr_start + availmem_regions[i].mr_size,
		    availmem_regions[i].mr_size);

		phys_avail[j] = availmem_regions[i].mr_start;
		phys_avail[j + 1] = availmem_regions[i].mr_start +
		    availmem_regions[i].mr_size;
	}
	phys_avail[j] = 0;
	phys_avail[j + 1] = 0;
}

void *
initarm(void *mdp, void *unused __unused)
{
	struct pv_addr kernel_l1pt;
	struct pv_addr dpcpu;
	vm_offset_t freemempos, l2_start, lastaddr;
	uint32_t memsize, l2size;
	struct bi_mem_region *mr;
	void *kmdp;
	u_int l1pagetable;
	int i = 0, j = 0;

	kmdp = NULL;
	lastaddr = 0;
	memsize = 0;

	set_cpufuncs();

	/*
	 * Mask metadata pointer: it is supposed to be on page boundary. If
	 * the first argument (mdp) doesn't point to a valid address the
	 * bootloader must have passed us something else than the metadata
	 * ptr... In this case we want to fall back to some built-in settings.
	 */
	mdp = (void *)((uint32_t)mdp & ~PAGE_MASK);

	/* Parse metadata and fetch parameters */
	if (mdp != NULL) {
		preload_metadata = mdp;
		kmdp = preload_search_by_type("elf kernel");
		if (kmdp != NULL) {
			bootinfo = (struct bootinfo *)preload_search_info(kmdp,
			    MODINFO_METADATA|MODINFOMD_BOOTINFO);

			boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
			kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *);
			lastaddr = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t);
		}

		/* Initialize memory regions table */
		mr = bootinfo_mr();
		for (i = 0; i < bootinfo->bi_mem_reg_no; i++, mr++) {
			if (i == MEM_REGIONS)
				break;
			availmem_regions[i].mr_start = mr->mem_base;
			availmem_regions[i].mr_size = mr->mem_size;
			memsize += mr->mem_size;
		}
		availmem_regions_sz = i;
	} else {
		/* Fall back to hardcoded boothowto flags and metadata. */
		boothowto = RB_VERBOSE | RB_SINGLE;
		lastaddr = fake_preload_metadata();

		/*
		 * Assume a single memory region of size specified in board
		 * configuration file.
		 */
		memsize = PHYSMEM_SIZE;
	}

	/*
	 * If memsize is invalid, we can neither proceed nor panic (too
	 * early for console output).
	 */
	if (memsize == 0)
		while (1);

	/* Platform-specific initialisation */
	pmap_bootstrap_lastaddr = MV_BASE - ARM_NOCACHE_KVA_SIZE;
	pmap_devmap_bootstrap_table = &pmap_devmap[0];

	pcpu_init(pcpup, 0, sizeof(struct pcpu));
	PCPU_SET(curthread, &thread0);

	/* Calculate number of L2 tables needed for mapping vm_page_array */
	l2size = (memsize / PAGE_SIZE) * sizeof(struct vm_page);
	l2size = (l2size >> L1_S_SHIFT) + 1;

	/*
	 * Add one table for end of kernel map, one for stacks, msgbuf and
	 * L1 and L2 tables map and one for vectors map.
	 */
	l2size += 3;

	/* Make it divisible by 4 */
	l2size = (l2size + 3) & ~3;

#define KERNEL_TEXT_BASE (KERNBASE)
	freemempos = (lastaddr + PAGE_MASK) & ~PAGE_MASK;

	/* Define a macro to simplify memory allocation */
#define valloc_pages(var, np)                   \
	alloc_pages((var).pv_va, (np));         \
	(var).pv_pa = (var).pv_va + (KERNPHYSADDR - KERNVIRTADDR);

#define alloc_pages(var, np)			\
	(var) = freemempos;		\
	freemempos += (np * PAGE_SIZE);		\
	memset((char *)(var), 0, ((np) * PAGE_SIZE));

	while (((freemempos - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) != 0)
		freemempos += PAGE_SIZE;
	valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);

	for (i = 0; i < l2size; ++i) {
		if (!(i % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) {
			valloc_pages(kernel_pt_table[i],
			    L2_TABLE_SIZE / PAGE_SIZE);
			j = i;
		} else {
			kernel_pt_table[i].pv_va = kernel_pt_table[j].pv_va +
			    L2_TABLE_SIZE_REAL * (i - j);
			kernel_pt_table[i].pv_pa =
			    kernel_pt_table[i].pv_va - KERNVIRTADDR +
			    KERNPHYSADDR;

		}
	}
	/*
	 * Allocate a page for the system page mapped to 0x00000000
	 * or 0xffff0000. This page will just contain the system vectors
	 * and can be shared by all processes.
	 */
	valloc_pages(systempage, 1);

	/* Allocate dynamic per-cpu area. */
	valloc_pages(dpcpu, DPCPU_SIZE / PAGE_SIZE);
	dpcpu_init((void *)dpcpu.pv_va, 0);

	/* Allocate stacks for all modes */
	valloc_pages(irqstack, IRQ_STACK_SIZE);
	valloc_pages(abtstack, ABT_STACK_SIZE);
	valloc_pages(undstack, UND_STACK_SIZE);
	valloc_pages(kernelstack, KSTACK_PAGES);
	valloc_pages(msgbufpv, round_page(MSGBUF_SIZE) / PAGE_SIZE);

	/*
	 * Now we start construction of the L1 page table
	 * We start by mapping the L2 page tables into the L1.
	 * This means that we can replace L1 mappings later on if necessary
	 */
	l1pagetable = kernel_l1pt.pv_va;

	/*
	 * Try to map as much as possible of kernel text and data using
	 * 1MB section mapping and for the rest of initial kernel address
	 * space use L2 coarse tables.
	 *
	 * Link L2 tables for mapping remainder of kernel (modulo 1MB)
	 * and kernel structures
	 */
	l2_start = lastaddr & ~(L1_S_OFFSET);
	for (i = 0 ; i < l2size - 1; i++)
		pmap_link_l2pt(l1pagetable, l2_start + i * L1_S_SIZE,
		    &kernel_pt_table[i]);

	pmap_curmaxkvaddr = l2_start + (l2size - 1) * L1_S_SIZE;
	
	/* Map kernel code and data */
	pmap_map_chunk(l1pagetable, KERNVIRTADDR, KERNPHYSADDR,
	   (((uint32_t)(lastaddr) - KERNVIRTADDR) + PAGE_MASK) & ~PAGE_MASK,
	    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);


	/* Map L1 directory and allocated L2 page tables */
	pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
	    L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);

	pmap_map_chunk(l1pagetable, kernel_pt_table[0].pv_va,
	    kernel_pt_table[0].pv_pa,
	    L2_TABLE_SIZE_REAL * l2size,
	    VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);

	/* Map allocated DPCPU, stacks and msgbuf */
	pmap_map_chunk(l1pagetable, dpcpu.pv_va, dpcpu.pv_pa,
	    freemempos - dpcpu.pv_va,
	    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);

	/* Link and map the vector page */
	pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH,
	    &kernel_pt_table[l2size - 1]);
	pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
	    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);

	pmap_devmap_bootstrap(l1pagetable, pmap_devmap_bootstrap_table);
	cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL * 2)) |
	    DOMAIN_CLIENT);
	setttb(kernel_l1pt.pv_pa);
	cpu_tlb_flushID();
	cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL * 2));
	cninit();
	physmem = memsize / PAGE_SIZE;

	debugf("initarm: console initialized\n");
	debugf(" arg1 mdp = 0x%08x\n", (uint32_t)mdp);
	debugf(" boothowto = 0x%08x\n", boothowto);
	print_bootinfo();
	print_kernel_section_addr();
	print_kenv();

	/*
	 * Re-initialise MPP
	 */
	platform_mpp_init();

	/*
	 * Re-initialise decode windows
	 */
	if (soc_decode_win() != 0)
		printf("WARNING: could not re-initialise decode windows! "
		    "Running with existing settings...\n");
	/*
	 * Pages were allocated during the secondary bootstrap for the
	 * stacks for different CPU modes.
	 * We must now set the r13 registers in the different CPU modes to
	 * point to these stacks.
	 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
	 * of the stack memory.
	 */
	cpu_control(CPU_CONTROL_MMU_ENABLE, CPU_CONTROL_MMU_ENABLE);
	set_stackptr(PSR_IRQ32_MODE,
	    irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
	set_stackptr(PSR_ABT32_MODE,
	    abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
	set_stackptr(PSR_UND32_MODE,
	    undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);

	/*
	 * We must now clean the cache again....
	 * Cleaning may be done by reading new data to displace any
	 * dirty data in the cache. This will have happened in setttb()
	 * but since we are boot strapping the addresses used for the read
	 * may have just been remapped and thus the cache could be out
	 * of sync. A re-clean after the switch will cure this.
	 * After booting there are no gross relocations of the kernel thus
	 * this problem will not occur after initarm().
	 */
	cpu_idcache_wbinv_all();

	/* Set stack for exception handlers */
	data_abort_handler_address = (u_int)data_abort_handler;
	prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
	undefined_handler_address = (u_int)undefinedinstruction_bounce;
	undefined_init();

	proc_linkup0(&proc0, &thread0);
	thread0.td_kstack = kernelstack.pv_va;
	thread0.td_kstack_pages = KSTACK_PAGES;
	thread0.td_pcb = (struct pcb *)
	    (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1;
	thread0.td_pcb->pcb_flags = 0;
	thread0.td_frame = &proc0_tf;
	pcpup->pc_curpcb = thread0.td_pcb;

	arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);

	dump_avail[0] = 0;
	dump_avail[1] = memsize;
	dump_avail[2] = 0;
	dump_avail[3] = 0;

	pmap_bootstrap(freemempos, pmap_bootstrap_lastaddr, &kernel_l1pt);
	msgbufp = (void *)msgbufpv.pv_va;
	msgbufinit(msgbufp, MSGBUF_SIZE);
	mutex_init();

	/*
	 * Prepare map of physical memory regions available to vm subsystem.
	 * If metadata pointer doesn't point to a valid address, use hardcoded
	 * values.
	 */
	physmap_init((mdp != NULL) ? 0 : 1);

	/* Do basic tuning, hz etc */
	init_param1();
	init_param2(physmem);
	kdb_init();
	return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP -
	    sizeof(struct pcb)));
}

struct arm32_dma_range *
bus_dma_get_range(void)
{

	return (NULL);
}

int
bus_dma_get_range_nb(void)
{

	return (0);
}
OpenPOWER on IntegriCloud