summaryrefslogtreecommitdiff
path: root/arch/blackfin/kernel/setup.c
blob: 2255c289a714db37938d0b96345de10335dbc7ae (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
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
/*
 * arch/blackfin/kernel/setup.c
 *
 * Copyright 2004-2006 Analog Devices Inc.
 *
 * Enter bugs at http://blackfin.uclinux.org/
 *
 * Licensed under the GPL-2 or later.
 */

#include <linux/delay.h>
#include <linux/console.h>
#include <linux/bootmem.h>
#include <linux/seq_file.h>
#include <linux/cpu.h>
#include <linux/module.h>
#include <linux/tty.h>
#include <linux/pfn.h>

#include <linux/ext2_fs.h>
#include <linux/cramfs_fs.h>
#include <linux/romfs_fs.h>

#include <asm/cplb.h>
#include <asm/cacheflush.h>
#include <asm/blackfin.h>
#include <asm/cplbinit.h>
#include <asm/div64.h>
#include <asm/fixed_code.h>
#include <asm/early_printk.h>

static DEFINE_PER_CPU(struct cpu, cpu_devices);

u16 _bfin_swrst;
EXPORT_SYMBOL(_bfin_swrst);

unsigned long memory_start, memory_end, physical_mem_end;
unsigned long reserved_mem_dcache_on;
unsigned long reserved_mem_icache_on;
EXPORT_SYMBOL(memory_start);
EXPORT_SYMBOL(memory_end);
EXPORT_SYMBOL(physical_mem_end);
EXPORT_SYMBOL(_ramend);

#ifdef CONFIG_MTD_UCLINUX
unsigned long memory_mtd_end, memory_mtd_start, mtd_size;
unsigned long _ebss;
EXPORT_SYMBOL(memory_mtd_end);
EXPORT_SYMBOL(memory_mtd_start);
EXPORT_SYMBOL(mtd_size);
#endif

char __initdata command_line[COMMAND_LINE_SIZE];

/* boot memmap, for parsing "memmap=" */
#define BFIN_MEMMAP_MAX		128 /* number of entries in bfin_memmap */
#define BFIN_MEMMAP_RAM		1
#define BFIN_MEMMAP_RESERVED	2
struct bfin_memmap {
	int nr_map;
	struct bfin_memmap_entry {
		unsigned long long addr; /* start of memory segment */
		unsigned long long size;
		unsigned long type;
	} map[BFIN_MEMMAP_MAX];
} bfin_memmap __initdata;

/* for memmap sanitization */
struct change_member {
	struct bfin_memmap_entry *pentry; /* pointer to original entry */
	unsigned long long addr; /* address for this change point */
};
static struct change_member change_point_list[2*BFIN_MEMMAP_MAX] __initdata;
static struct change_member *change_point[2*BFIN_MEMMAP_MAX] __initdata;
static struct bfin_memmap_entry *overlap_list[BFIN_MEMMAP_MAX] __initdata;
static struct bfin_memmap_entry new_map[BFIN_MEMMAP_MAX] __initdata;

void __init bf53x_cache_init(void)
{
#if defined(CONFIG_BFIN_DCACHE) || defined(CONFIG_BFIN_ICACHE)
	generate_cpl_tables();
#endif

#ifdef CONFIG_BFIN_ICACHE
	bfin_icache_init();
	printk(KERN_INFO "Instruction Cache Enabled\n");
#endif

#ifdef CONFIG_BFIN_DCACHE
	bfin_dcache_init();
	printk(KERN_INFO "Data Cache Enabled"
# if defined CONFIG_BFIN_WB
		" (write-back)"
# elif defined CONFIG_BFIN_WT
		" (write-through)"
# endif
		"\n");
#endif
}

void __init bf53x_relocate_l1_mem(void)
{
	unsigned long l1_code_length;
	unsigned long l1_data_a_length;
	unsigned long l1_data_b_length;

	l1_code_length = _etext_l1 - _stext_l1;
	if (l1_code_length > L1_CODE_LENGTH)
		l1_code_length = L1_CODE_LENGTH;
	/* cannot complain as printk is not available as yet.
	 * But we can continue booting and complain later!
	 */

	/* Copy _stext_l1 to _etext_l1 to L1 instruction SRAM */
	dma_memcpy(_stext_l1, _l1_lma_start, l1_code_length);

	l1_data_a_length = _ebss_l1 - _sdata_l1;
	if (l1_data_a_length > L1_DATA_A_LENGTH)
		l1_data_a_length = L1_DATA_A_LENGTH;

	/* Copy _sdata_l1 to _ebss_l1 to L1 data bank A SRAM */
	dma_memcpy(_sdata_l1, _l1_lma_start + l1_code_length, l1_data_a_length);

	l1_data_b_length = _ebss_b_l1 - _sdata_b_l1;
	if (l1_data_b_length > L1_DATA_B_LENGTH)
		l1_data_b_length = L1_DATA_B_LENGTH;

	/* Copy _sdata_b_l1 to _ebss_b_l1 to L1 data bank B SRAM */
	dma_memcpy(_sdata_b_l1, _l1_lma_start + l1_code_length +
			l1_data_a_length, l1_data_b_length);

}

/* add_memory_region to memmap */
static void __init add_memory_region(unsigned long long start,
			      unsigned long long size, int type)
{
	int i;

	i = bfin_memmap.nr_map;

	if (i == BFIN_MEMMAP_MAX) {
		printk(KERN_ERR "Ooops! Too many entries in the memory map!\n");
		return;
	}

	bfin_memmap.map[i].addr = start;
	bfin_memmap.map[i].size = size;
	bfin_memmap.map[i].type = type;
	bfin_memmap.nr_map++;
}

/*
 * Sanitize the boot memmap, removing overlaps.
 */
static int __init sanitize_memmap(struct bfin_memmap_entry *map, int *pnr_map)
{
	struct change_member *change_tmp;
	unsigned long current_type, last_type;
	unsigned long long last_addr;
	int chgidx, still_changing;
	int overlap_entries;
	int new_entry;
	int old_nr, new_nr, chg_nr;
	int i;

	/*
		Visually we're performing the following (1,2,3,4 = memory types)

		Sample memory map (w/overlaps):
		   ____22__________________
		   ______________________4_
		   ____1111________________
		   _44_____________________
		   11111111________________
		   ____________________33__
		   ___________44___________
		   __________33333_________
		   ______________22________
		   ___________________2222_
		   _________111111111______
		   _____________________11_
		   _________________4______

		Sanitized equivalent (no overlap):
		   1_______________________
		   _44_____________________
		   ___1____________________
		   ____22__________________
		   ______11________________
		   _________1______________
		   __________3_____________
		   ___________44___________
		   _____________33_________
		   _______________2________
		   ________________1_______
		   _________________4______
		   ___________________2____
		   ____________________33__
		   ______________________4_
	*/
	/* if there's only one memory region, don't bother */
	if (*pnr_map < 2)
		return -1;

	old_nr = *pnr_map;

	/* bail out if we find any unreasonable addresses in memmap */
	for (i = 0; i < old_nr; i++)
		if (map[i].addr + map[i].size < map[i].addr)
			return -1;

	/* create pointers for initial change-point information (for sorting) */
	for (i = 0; i < 2*old_nr; i++)
		change_point[i] = &change_point_list[i];

	/* record all known change-points (starting and ending addresses),
	   omitting those that are for empty memory regions */
	chgidx = 0;
	for (i = 0; i < old_nr; i++)	{
		if (map[i].size != 0) {
			change_point[chgidx]->addr = map[i].addr;
			change_point[chgidx++]->pentry = &map[i];
			change_point[chgidx]->addr = map[i].addr + map[i].size;
			change_point[chgidx++]->pentry = &map[i];
		}
	}
	chg_nr = chgidx;    	/* true number of change-points */

	/* sort change-point list by memory addresses (low -> high) */
	still_changing = 1;
	while (still_changing)	{
		still_changing = 0;
		for (i = 1; i < chg_nr; i++)  {
			/* if <current_addr> > <last_addr>, swap */
			/* or, if current=<start_addr> & last=<end_addr>, swap */
			if ((change_point[i]->addr < change_point[i-1]->addr) ||
				((change_point[i]->addr == change_point[i-1]->addr) &&
				 (change_point[i]->addr == change_point[i]->pentry->addr) &&
				 (change_point[i-1]->addr != change_point[i-1]->pentry->addr))
			   ) {
				change_tmp = change_point[i];
				change_point[i] = change_point[i-1];
				change_point[i-1] = change_tmp;
				still_changing = 1;
			}
		}
	}

	/* create a new memmap, removing overlaps */
	overlap_entries = 0;	 /* number of entries in the overlap table */
	new_entry = 0;	 /* index for creating new memmap entries */
	last_type = 0;		 /* start with undefined memory type */
	last_addr = 0;		 /* start with 0 as last starting address */
	/* loop through change-points, determining affect on the new memmap */
	for (chgidx = 0; chgidx < chg_nr; chgidx++) {
		/* keep track of all overlapping memmap entries */
		if (change_point[chgidx]->addr == change_point[chgidx]->pentry->addr) {
			/* add map entry to overlap list (> 1 entry implies an overlap) */
			overlap_list[overlap_entries++] = change_point[chgidx]->pentry;
		} else {
			/* remove entry from list (order independent, so swap with last) */
			for (i = 0; i < overlap_entries; i++) {
				if (overlap_list[i] == change_point[chgidx]->pentry)
					overlap_list[i] = overlap_list[overlap_entries-1];
			}
			overlap_entries--;
		}
		/* if there are overlapping entries, decide which "type" to use */
		/* (larger value takes precedence -- 1=usable, 2,3,4,4+=unusable) */
		current_type = 0;
		for (i = 0; i < overlap_entries; i++)
			if (overlap_list[i]->type > current_type)
				current_type = overlap_list[i]->type;
		/* continue building up new memmap based on this information */
		if (current_type != last_type)	{
			if (last_type != 0) {
				new_map[new_entry].size =
					change_point[chgidx]->addr - last_addr;
				/* move forward only if the new size was non-zero */
				if (new_map[new_entry].size != 0)
					if (++new_entry >= BFIN_MEMMAP_MAX)
						break; 	/* no more space left for new entries */
			}
			if (current_type != 0) {
				new_map[new_entry].addr = change_point[chgidx]->addr;
				new_map[new_entry].type = current_type;
				last_addr = change_point[chgidx]->addr;
			}
			last_type = current_type;
		}
	}
	new_nr = new_entry;   /* retain count for new entries */

	/* copy new  mapping into original location */
	memcpy(map, new_map, new_nr*sizeof(struct bfin_memmap_entry));
	*pnr_map = new_nr;

	return 0;
}

static void __init print_memory_map(char *who)
{
	int i;

	for (i = 0; i < bfin_memmap.nr_map; i++) {
		printk(KERN_DEBUG " %s: %016Lx - %016Lx ", who,
			bfin_memmap.map[i].addr,
			bfin_memmap.map[i].addr + bfin_memmap.map[i].size);
		switch (bfin_memmap.map[i].type) {
		case BFIN_MEMMAP_RAM:
				printk("(usable)\n");
				break;
		case BFIN_MEMMAP_RESERVED:
				printk("(reserved)\n");
				break;
		default:	printk("type %lu\n", bfin_memmap.map[i].type);
				break;
		}
	}
}

static __init int parse_memmap(char *arg)
{
	unsigned long long start_at, mem_size;

	if (!arg)
		return -EINVAL;

	mem_size = memparse(arg, &arg);
	if (*arg == '@') {
		start_at = memparse(arg+1, &arg);
		add_memory_region(start_at, mem_size, BFIN_MEMMAP_RAM);
	} else if (*arg == '$') {
		start_at = memparse(arg+1, &arg);
		add_memory_region(start_at, mem_size, BFIN_MEMMAP_RESERVED);
	}

	return 0;
}

/*
 * Initial parsing of the command line.  Currently, we support:
 *  - Controlling the linux memory size: mem=xxx[KMG]
 *  - Controlling the physical memory size: max_mem=xxx[KMG][$][#]
 *       $ -> reserved memory is dcacheable
 *       # -> reserved memory is icacheable
 *  - "memmap=XXX[KkmM][@][$]XXX[KkmM]" defines a memory region
 *       @ from <start> to <start>+<mem>, type RAM
 *       $ from <start> to <start>+<mem>, type RESERVED
 *
 */
static __init void parse_cmdline_early(char *cmdline_p)
{
	char c = ' ', *to = cmdline_p;
	unsigned int memsize;
	for (;;) {
		if (c == ' ') {
			if (!memcmp(to, "mem=", 4)) {
				to += 4;
				memsize = memparse(to, &to);
				if (memsize)
					_ramend = memsize;

			} else if (!memcmp(to, "max_mem=", 8)) {
				to += 8;
				memsize = memparse(to, &to);
				if (memsize) {
					physical_mem_end = memsize;
					if (*to != ' ') {
						if (*to == '$'
						    || *(to + 1) == '$')
							reserved_mem_dcache_on =
							    1;
						if (*to == '#'
						    || *(to + 1) == '#')
							reserved_mem_icache_on =
							    1;
					}
				}
			} else if (!memcmp(to, "earlyprintk=", 12)) {
				to += 12;
				setup_early_printk(to);
			} else if (!memcmp(to, "memmap=", 7)) {
				to += 7;
				parse_memmap(to);
			}
		}
		c = *(to++);
		if (!c)
			break;
	}
}

/*
 * Setup memory defaults from user config.
 * The physical memory layout looks like:
 *
 *  [_rambase, _ramstart]:		kernel image
 *  [memory_start, memory_end]:		dynamic memory managed by kernel
 *  [memory_end, _ramend]:		reserved memory
 *  	[meory_mtd_start(memory_end),
 *  		memory_mtd_start + mtd_size]:	rootfs (if any)
 *	[_ramend - DMA_UNCACHED_REGION,
 *		_ramend]:			uncached DMA region
 *  [_ramend, physical_mem_end]:	memory not managed by kernel
 *
 */
static __init void  memory_setup(void)
{
#ifdef CONFIG_MTD_UCLINUX
	unsigned long mtd_phys = 0;
#endif

	_rambase = (unsigned long)_stext;
	_ramstart = (unsigned long)_end;

	if (DMA_UNCACHED_REGION > (_ramend - _ramstart)) {
		console_init();
		panic("DMA region exceeds memory limit: %lu.\n",
			_ramend - _ramstart);
	}
	memory_end = _ramend - DMA_UNCACHED_REGION;

#ifdef CONFIG_MPU
	/* Round up to multiple of 4MB.  */
	memory_start = (_ramstart + 0x3fffff) & ~0x3fffff;
#else
	memory_start = PAGE_ALIGN(_ramstart);
#endif

#if defined(CONFIG_MTD_UCLINUX)
	/* generic memory mapped MTD driver */
	memory_mtd_end = memory_end;

	mtd_phys = _ramstart;
	mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 8)));

# if defined(CONFIG_EXT2_FS) || defined(CONFIG_EXT3_FS)
	if (*((unsigned short *)(mtd_phys + 0x438)) == EXT2_SUPER_MAGIC)
		mtd_size =
		    PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x404)) << 10);
# endif

# if defined(CONFIG_CRAMFS)
	if (*((unsigned long *)(mtd_phys)) == CRAMFS_MAGIC)
		mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x4)));
# endif

# if defined(CONFIG_ROMFS_FS)
	if (((unsigned long *)mtd_phys)[0] == ROMSB_WORD0
	    && ((unsigned long *)mtd_phys)[1] == ROMSB_WORD1)
		mtd_size =
		    PAGE_ALIGN(be32_to_cpu(((unsigned long *)mtd_phys)[2]));
#  if (defined(CONFIG_BFIN_ICACHE) && ANOMALY_05000263)
	/* Due to a Hardware Anomaly we need to limit the size of usable
	 * instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
	 * 05000263 - Hardware loop corrupted when taking an ICPLB exception
	 */
#   if (defined(CONFIG_DEBUG_HUNT_FOR_ZERO))
	if (memory_end >= 56 * 1024 * 1024)
		memory_end = 56 * 1024 * 1024;
#   else
	if (memory_end >= 60 * 1024 * 1024)
		memory_end = 60 * 1024 * 1024;
#   endif				/* CONFIG_DEBUG_HUNT_FOR_ZERO */
#  endif				/* ANOMALY_05000263 */
# endif				/* CONFIG_ROMFS_FS */

	memory_end -= mtd_size;

	if (mtd_size == 0) {
		console_init();
		panic("Don't boot kernel without rootfs attached.\n");
	}

	/* Relocate MTD image to the top of memory after the uncached memory area */
	dma_memcpy((char *)memory_end, _end, mtd_size);

	memory_mtd_start = memory_end;
	_ebss = memory_mtd_start;	/* define _ebss for compatible */
#endif				/* CONFIG_MTD_UCLINUX */

#if (defined(CONFIG_BFIN_ICACHE) && ANOMALY_05000263)
	/* Due to a Hardware Anomaly we need to limit the size of usable
	 * instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
	 * 05000263 - Hardware loop corrupted when taking an ICPLB exception
	 */
#if (defined(CONFIG_DEBUG_HUNT_FOR_ZERO))
	if (memory_end >= 56 * 1024 * 1024)
		memory_end = 56 * 1024 * 1024;
#else
	if (memory_end >= 60 * 1024 * 1024)
		memory_end = 60 * 1024 * 1024;
#endif				/* CONFIG_DEBUG_HUNT_FOR_ZERO */
	printk(KERN_NOTICE "Warning: limiting memory to %liMB due to hardware anomaly 05000263\n", memory_end >> 20);
#endif				/* ANOMALY_05000263 */

#ifdef CONFIG_MPU
	page_mask_nelts = ((_ramend >> PAGE_SHIFT) + 31) / 32;
	page_mask_order = get_order(3 * page_mask_nelts * sizeof(long));
#endif

#if !defined(CONFIG_MTD_UCLINUX)
	/*In case there is no valid CPLB behind memory_end make sure we don't get to close*/
	memory_end -= SIZE_4K;
#endif

	init_mm.start_code = (unsigned long)_stext;
	init_mm.end_code = (unsigned long)_etext;
	init_mm.end_data = (unsigned long)_edata;
	init_mm.brk = (unsigned long)0;

	printk(KERN_INFO "Board Memory: %ldMB\n", physical_mem_end >> 20);
	printk(KERN_INFO "Kernel Managed Memory: %ldMB\n", _ramend >> 20);

	printk(KERN_INFO "Memory map:\n"
		KERN_INFO "  fixedcode = 0x%p-0x%p\n"
		KERN_INFO "  text      = 0x%p-0x%p\n"
		KERN_INFO "  rodata    = 0x%p-0x%p\n"
		KERN_INFO "  bss       = 0x%p-0x%p\n"
		KERN_INFO "  data      = 0x%p-0x%p\n"
		KERN_INFO "    stack   = 0x%p-0x%p\n"
		KERN_INFO "  init      = 0x%p-0x%p\n"
		KERN_INFO "  available = 0x%p-0x%p\n"
#ifdef CONFIG_MTD_UCLINUX
		KERN_INFO "  rootfs    = 0x%p-0x%p\n"
#endif
#if DMA_UNCACHED_REGION > 0
		KERN_INFO "  DMA Zone  = 0x%p-0x%p\n"
#endif
		, (void *)FIXED_CODE_START, (void *)FIXED_CODE_END,
		_stext, _etext,
		__start_rodata, __end_rodata,
		__bss_start, __bss_stop,
		_sdata, _edata,
		(void *)&init_thread_union,
		(void *)((int)(&init_thread_union) + 0x2000),
		__init_begin, __init_end,
		(void *)_ramstart, (void *)memory_end
#ifdef CONFIG_MTD_UCLINUX
		, (void *)memory_mtd_start, (void *)(memory_mtd_start + mtd_size)
#endif
#if DMA_UNCACHED_REGION > 0
		, (void *)(_ramend - DMA_UNCACHED_REGION), (void *)(_ramend)
#endif
		);
}

static __init void setup_bootmem_allocator(void)
{
	int bootmap_size;
	int i;
	unsigned long min_pfn, max_pfn;
	unsigned long curr_pfn, last_pfn, size;

	/* mark memory between memory_start and memory_end usable */
	add_memory_region(memory_start,
		memory_end - memory_start, BFIN_MEMMAP_RAM);
	/* sanity check for overlap */
	sanitize_memmap(bfin_memmap.map, &bfin_memmap.nr_map);
	print_memory_map("boot memmap");

	min_pfn = PAGE_OFFSET >> PAGE_SHIFT;
	max_pfn = memory_end >> PAGE_SHIFT;

	/*
	 * give all the memory to the bootmap allocator,  tell it to put the
	 * boot mem_map at the start of memory.
	 */
	bootmap_size = init_bootmem_node(NODE_DATA(0),
			memory_start >> PAGE_SHIFT,	/* map goes here */
			min_pfn, max_pfn);

	/* register the memmap regions with the bootmem allocator */
	for (i = 0; i < bfin_memmap.nr_map; i++) {
		/*
		 * Reserve usable memory
		 */
		if (bfin_memmap.map[i].type != BFIN_MEMMAP_RAM)
			continue;
		/*
		 * We are rounding up the start address of usable memory:
		 */
		curr_pfn = PFN_UP(bfin_memmap.map[i].addr);
		if (curr_pfn >= max_pfn)
			continue;
		/*
		 * ... and at the end of the usable range downwards:
		 */
		last_pfn = PFN_DOWN(bfin_memmap.map[i].addr +
					 bfin_memmap.map[i].size);

		if (last_pfn > max_pfn)
			last_pfn = max_pfn;

		/*
		 * .. finally, did all the rounding and playing
		 * around just make the area go away?
		 */
		if (last_pfn <= curr_pfn)
			continue;

		size = last_pfn - curr_pfn;
		free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(size));
	}

	/* reserve memory before memory_start, including bootmap */
	reserve_bootmem(PAGE_OFFSET,
		memory_start + bootmap_size + PAGE_SIZE - 1 - PAGE_OFFSET,
		BOOTMEM_DEFAULT);
}

void __init setup_arch(char **cmdline_p)
{
	unsigned long l1_length, sclk, cclk;

#ifdef CONFIG_DUMMY_CONSOLE
	conswitchp = &dummy_con;
#endif

#if defined(CONFIG_CMDLINE_BOOL)
	strncpy(&command_line[0], CONFIG_CMDLINE, sizeof(command_line));
	command_line[sizeof(command_line) - 1] = 0;
#endif

	/* Keep a copy of command line */
	*cmdline_p = &command_line[0];
	memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
	boot_command_line[COMMAND_LINE_SIZE - 1] = '\0';

	/* setup memory defaults from the user config */
	physical_mem_end = 0;
	_ramend = CONFIG_MEM_SIZE * 1024 * 1024;

	memset(&bfin_memmap, 0, sizeof(bfin_memmap));

	parse_cmdline_early(&command_line[0]);

	if (physical_mem_end == 0)
		physical_mem_end = _ramend;

	memory_setup();

	cclk = get_cclk();
	sclk = get_sclk();

#if !defined(CONFIG_BFIN_KERNEL_CLOCK)
	if (ANOMALY_05000273 && cclk == sclk)
		panic("ANOMALY 05000273, SCLK can not be same as CCLK");
#endif

#ifdef BF561_FAMILY
	if (ANOMALY_05000266) {
		bfin_read_IMDMA_D0_IRQ_STATUS();
		bfin_read_IMDMA_D1_IRQ_STATUS();
	}
#endif
	printk(KERN_INFO "Hardware Trace ");
	if (bfin_read_TBUFCTL() & 0x1)
		printk("Active ");
	else
		printk("Off ");
	if (bfin_read_TBUFCTL() & 0x2)
		printk("and Enabled\n");
	else
	printk("and Disabled\n");

#if defined(CONFIG_CHR_DEV_FLASH) || defined(CONFIG_BLK_DEV_FLASH)
	/* we need to initialize the Flashrom device here since we might
	 * do things with flash early on in the boot
	 */
	flash_probe();
#endif

	_bfin_swrst = bfin_read_SWRST();

	if (_bfin_swrst & RESET_DOUBLE)
		printk(KERN_INFO "Recovering from Double Fault event\n");
	else if (_bfin_swrst & RESET_WDOG)
		printk(KERN_INFO "Recovering from Watchdog event\n");
	else if (_bfin_swrst & RESET_SOFTWARE)
		printk(KERN_NOTICE "Reset caused by Software reset\n");

	printk(KERN_INFO "Blackfin support (C) 2004-2008 Analog Devices, Inc.\n");
	if (bfin_compiled_revid() == 0xffff)
		printk(KERN_INFO "Compiled for ADSP-%s Rev any\n", CPU);
	else if (bfin_compiled_revid() == -1)
		printk(KERN_INFO "Compiled for ADSP-%s Rev none\n", CPU);
	else
		printk(KERN_INFO "Compiled for ADSP-%s Rev 0.%d\n", CPU, bfin_compiled_revid());
	if (bfin_revid() != bfin_compiled_revid()) {
		if (bfin_compiled_revid() == -1)
			printk(KERN_ERR "Warning: Compiled for Rev none, but running on Rev %d\n",
			       bfin_revid());
		else if (bfin_compiled_revid() != 0xffff)
			printk(KERN_ERR "Warning: Compiled for Rev %d, but running on Rev %d\n",
			       bfin_compiled_revid(), bfin_revid());
	}
	if (bfin_revid() < SUPPORTED_REVID)
		printk(KERN_ERR "Warning: Unsupported Chip Revision ADSP-%s Rev 0.%d detected\n",
		       CPU, bfin_revid());
	printk(KERN_INFO "Blackfin Linux support by http://blackfin.uclinux.org/\n");

	printk(KERN_INFO "Processor Speed: %lu MHz core clock and %lu MHz System Clock\n",
	       cclk / 1000000,  sclk / 1000000);

	if (ANOMALY_05000273 && (cclk >> 1) <= sclk)
		printk("\n\n\nANOMALY_05000273: CCLK must be >= 2*SCLK !!!\n\n\n");

	setup_bootmem_allocator();

	paging_init();

	/* check the size of the l1 area */
	l1_length = _etext_l1 - _stext_l1;
	if (l1_length > L1_CODE_LENGTH)
		panic("L1 code memory overflow\n");

	l1_length = _ebss_l1 - _sdata_l1;
	if (l1_length > L1_DATA_A_LENGTH)
		panic("L1 data memory overflow\n");

	/* Copy atomic sequences to their fixed location, and sanity check that
	   these locations are the ones that we advertise to userspace.  */
	memcpy((void *)FIXED_CODE_START, &fixed_code_start,
	       FIXED_CODE_END - FIXED_CODE_START);
	BUG_ON((char *)&sigreturn_stub - (char *)&fixed_code_start
	       != SIGRETURN_STUB - FIXED_CODE_START);
	BUG_ON((char *)&atomic_xchg32 - (char *)&fixed_code_start
	       != ATOMIC_XCHG32 - FIXED_CODE_START);
	BUG_ON((char *)&atomic_cas32 - (char *)&fixed_code_start
	       != ATOMIC_CAS32 - FIXED_CODE_START);
	BUG_ON((char *)&atomic_add32 - (char *)&fixed_code_start
	       != ATOMIC_ADD32 - FIXED_CODE_START);
	BUG_ON((char *)&atomic_sub32 - (char *)&fixed_code_start
	       != ATOMIC_SUB32 - FIXED_CODE_START);
	BUG_ON((char *)&atomic_ior32 - (char *)&fixed_code_start
	       != ATOMIC_IOR32 - FIXED_CODE_START);
	BUG_ON((char *)&atomic_and32 - (char *)&fixed_code_start
	       != ATOMIC_AND32 - FIXED_CODE_START);
	BUG_ON((char *)&atomic_xor32 - (char *)&fixed_code_start
	       != ATOMIC_XOR32 - FIXED_CODE_START);
	BUG_ON((char *)&safe_user_instruction - (char *)&fixed_code_start
		!= SAFE_USER_INSTRUCTION - FIXED_CODE_START);

	init_exception_vectors();
	bf53x_cache_init();
}

static int __init topology_init(void)
{
	int cpu;

	for_each_possible_cpu(cpu) {
		struct cpu *c = &per_cpu(cpu_devices, cpu);

		register_cpu(c, cpu);
	}

	return 0;
}

subsys_initcall(topology_init);

static u_long get_vco(void)
{
	u_long msel;
	u_long vco;

	msel = (bfin_read_PLL_CTL() >> 9) & 0x3F;
	if (0 == msel)
		msel = 64;

	vco = CONFIG_CLKIN_HZ;
	vco >>= (1 & bfin_read_PLL_CTL());	/* DF bit */
	vco = msel * vco;
	return vco;
}

/* Get the Core clock */
u_long get_cclk(void)
{
	u_long csel, ssel;
	if (bfin_read_PLL_STAT() & 0x1)
		return CONFIG_CLKIN_HZ;

	ssel = bfin_read_PLL_DIV();
	csel = ((ssel >> 4) & 0x03);
	ssel &= 0xf;
	if (ssel && ssel < (1 << csel))	/* SCLK > CCLK */
		return get_vco() / ssel;
	return get_vco() >> csel;
}
EXPORT_SYMBOL(get_cclk);

/* Get the System clock */
u_long get_sclk(void)
{
	u_long ssel;

	if (bfin_read_PLL_STAT() & 0x1)
		return CONFIG_CLKIN_HZ;

	ssel = (bfin_read_PLL_DIV() & 0xf);
	if (0 == ssel) {
		printk(KERN_WARNING "Invalid System Clock\n");
		ssel = 1;
	}

	return get_vco() / ssel;
}
EXPORT_SYMBOL(get_sclk);

unsigned long sclk_to_usecs(unsigned long sclk)
{
	u64 tmp = USEC_PER_SEC * (u64)sclk;
	do_div(tmp, get_sclk());
	return tmp;
}
EXPORT_SYMBOL(sclk_to_usecs);

unsigned long usecs_to_sclk(unsigned long usecs)
{
	u64 tmp = get_sclk() * (u64)usecs;
	do_div(tmp, USEC_PER_SEC);
	return tmp;
}
EXPORT_SYMBOL(usecs_to_sclk);

/*
 *	Get CPU information for use by the procfs.
 */
static int show_cpuinfo(struct seq_file *m, void *v)
{
	char *cpu, *mmu, *fpu, *vendor, *cache;
	uint32_t revid;

	u_long cclk = 0, sclk = 0;
	u_int dcache_size = 0, dsup_banks = 0;

	cpu = CPU;
	mmu = "none";
	fpu = "none";
	revid = bfin_revid();

	cclk = get_cclk();
	sclk = get_sclk();

	switch (bfin_read_CHIPID() & CHIPID_MANUFACTURE) {
	case 0xca:
		vendor = "Analog Devices";
		break;
	default:
		vendor = "unknown";
		break;
	}

	seq_printf(m, "processor\t: %d\n"
		"vendor_id\t: %s\n"
		"cpu family\t: 0x%x\n"
		"model name\t: ADSP-%s %lu(MHz CCLK) %lu(MHz SCLK)\n"
		"stepping\t: %d\n",
		0,
		vendor,
		(bfin_read_CHIPID() & CHIPID_FAMILY),
		cpu, cclk/1000000, sclk/1000000,
		revid);

	seq_printf(m, "cpu MHz\t\t: %lu.%03lu/%lu.%03lu\n",
		cclk/1000000, cclk%1000000,
		sclk/1000000, sclk%1000000);
	seq_printf(m, "bogomips\t: %lu.%02lu\n"
		"Calibration\t: %lu loops\n",
		(loops_per_jiffy * HZ) / 500000,
		((loops_per_jiffy * HZ) / 5000) % 100,
		(loops_per_jiffy * HZ));

	/* Check Cache configutation */
	switch (bfin_read_DMEM_CONTROL() & (1 << DMC0_P | 1 << DMC1_P)) {
	case ACACHE_BSRAM:
		cache = "dbank-A/B\t: cache/sram";
		dcache_size = 16;
		dsup_banks = 1;
		break;
	case ACACHE_BCACHE:
		cache = "dbank-A/B\t: cache/cache";
		dcache_size = 32;
		dsup_banks = 2;
		break;
	case ASRAM_BSRAM:
		cache = "dbank-A/B\t: sram/sram";
		dcache_size = 0;
		dsup_banks = 0;
		break;
	default:
		cache = "unknown";
		dcache_size = 0;
		dsup_banks = 0;
		break;
	}

	/* Is it turned on? */
	if (!((bfin_read_DMEM_CONTROL()) & (ENDCPLB | DMC_ENABLE)))
		dcache_size = 0;

	seq_printf(m, "cache size\t: %d KB(L1 icache) "
		"%d KB(L1 dcache-%s) %d KB(L2 cache)\n",
		BFIN_ICACHESIZE / 1024, dcache_size,
#if defined CONFIG_BFIN_WB
		"wb"
#elif defined CONFIG_BFIN_WT
		"wt"
#endif
		"", 0);

	seq_printf(m, "%s\n", cache);

	seq_printf(m, "icache setup\t: %d Sub-banks/%d Ways, %d Lines/Way\n",
		   BFIN_ISUBBANKS, BFIN_IWAYS, BFIN_ILINES);
	seq_printf(m,
		   "dcache setup\t: %d Super-banks/%d Sub-banks/%d Ways, %d Lines/Way\n",
		   dsup_banks, BFIN_DSUBBANKS, BFIN_DWAYS,
		   BFIN_DLINES);
#ifdef CONFIG_BFIN_ICACHE_LOCK
	switch (read_iloc()) {
	case WAY0_L:
		seq_printf(m, "Way0 Locked-Down\n");
		break;
	case WAY1_L:
		seq_printf(m, "Way1 Locked-Down\n");
		break;
	case WAY01_L:
		seq_printf(m, "Way0,Way1 Locked-Down\n");
		break;
	case WAY2_L:
		seq_printf(m, "Way2 Locked-Down\n");
		break;
	case WAY02_L:
		seq_printf(m, "Way0,Way2 Locked-Down\n");
		break;
	case WAY12_L:
		seq_printf(m, "Way1,Way2 Locked-Down\n");
		break;
	case WAY012_L:
		seq_printf(m, "Way0,Way1 & Way2 Locked-Down\n");
		break;
	case WAY3_L:
		seq_printf(m, "Way3 Locked-Down\n");
		break;
	case WAY03_L:
		seq_printf(m, "Way0,Way3 Locked-Down\n");
		break;
	case WAY13_L:
		seq_printf(m, "Way1,Way3 Locked-Down\n");
		break;
	case WAY013_L:
		seq_printf(m, "Way 0,Way1,Way3 Locked-Down\n");
		break;
	case WAY32_L:
		seq_printf(m, "Way3,Way2 Locked-Down\n");
		break;
	case WAY320_L:
		seq_printf(m, "Way3,Way2,Way0 Locked-Down\n");
		break;
	case WAY321_L:
		seq_printf(m, "Way3,Way2,Way1 Locked-Down\n");
		break;
	case WAYALL_L:
		seq_printf(m, "All Ways are locked\n");
		break;
	default:
		seq_printf(m, "No Ways are locked\n");
	}
#endif

	seq_printf(m, "board name\t: %s\n", bfin_board_name);
	seq_printf(m, "board memory\t: %ld kB (0x%p -> 0x%p)\n",
		 physical_mem_end >> 10, (void *)0, (void *)physical_mem_end);
	seq_printf(m, "kernel memory\t: %d kB (0x%p -> 0x%p)\n",
		((int)memory_end - (int)_stext) >> 10,
		_stext,
		(void *)memory_end);

	return 0;
}

static void *c_start(struct seq_file *m, loff_t *pos)
{
	return *pos < NR_CPUS ? ((void *)0x12345678) : NULL;
}

static void *c_next(struct seq_file *m, void *v, loff_t *pos)
{
	++*pos;
	return c_start(m, pos);
}

static void c_stop(struct seq_file *m, void *v)
{
}

const struct seq_operations cpuinfo_op = {
	.start = c_start,
	.next = c_next,
	.stop = c_stop,
	.show = show_cpuinfo,
};

void __init cmdline_init(const char *r0)
{
	if (r0)
		strncpy(command_line, r0, COMMAND_LINE_SIZE);
}