aboutsummaryrefslogtreecommitdiffstats
path: root/arch/blackfin/kernel/setup.c
blob: 534227f4da309800d08a816df0ef3e5a6667cfb2 (plain) (blame)
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
/*
 * File:         arch/blackfin/kernel/setup.c
 * Based on:
 * Author:
 *
 * Created:
 * Description:
 *
 * Modified:
 *               Copyright 2004-2006 Analog Devices Inc.
 *
 * Bugs:         Enter bugs at http://blackfin.uclinux.org/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see the file COPYING, or write
 * to the Free Software Foundation, Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

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

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

u16 _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];

#if defined(CONFIG_BLKFIN_DCACHE) || defined(CONFIG_BLKFIN_CACHE)
static void generate_cpl_tables(void);
#endif

void __init bf53x_cache_init(void)
{
#if defined(CONFIG_BLKFIN_DCACHE) || defined(CONFIG_BLKFIN_CACHE)
	generate_cpl_tables();
#endif

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

#ifdef CONFIG_BLKFIN_DCACHE
	bfin_dcache_init();
	printk(KERN_INFO "Data Cache Enabled"
# if defined CONFIG_BLKFIN_WB
		" (write-back)"
# elif defined CONFIG_BLKFIN_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);

}

/*
 * 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
 */
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;
					}
				}
			}

		}
		c = *(to++);
		if (!c)
			break;
	}
}

void __init setup_arch(char **cmdline_p)
{
	int bootmap_size;
	unsigned long l1_length, sclk, cclk;
#ifdef CONFIG_MTD_UCLINUX
	unsigned long mtd_phys = 0;
#endif

#ifdef CONFIG_DUMMY_CONSOLE
	conswitchp = &dummy_con;
#endif
	cclk = get_cclk();
	sclk = get_sclk();

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

#if defined(ANOMALY_05000266)
	bfin_read_IMDMA_D0_IRQ_STATUS();
	bfin_read_IMDMA_D1_IRQ_STATUS();
#endif

#ifdef DEBUG_SERIAL_EARLY_INIT
	bfin_console_init();	/* early console registration */
	/* this give a chance to get printk() working before crash. */
#endif

#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

#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;

	parse_cmdline_early(&command_line[0]);

	if (physical_mem_end == 0)
		physical_mem_end = _ramend;

	/* by now the stack is part of the init task */
	memory_end = _ramend - DMA_UNCACHED_REGION;

	_ramstart = (unsigned long)__bss_stop;
	memory_start = PAGE_ALIGN(_ramstart);

#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_BLKFIN_CACHE) && defined(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, __bss_stop, mtd_size);

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

#if (defined(CONFIG_BLKFIN_CACHE) && defined(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 */

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

	init_leds();

	printk(KERN_INFO "Blackfin support (C) 2004-2007 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 defined(ANOMALY_05000273)
	if ((cclk >> 1) <= sclk)
		printk("\n\n\nANOMALY_05000273: CCLK must be >= 2*SCLK !!!\n\n\n");
#endif

	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 "  text      = 0x%p-0x%p\n"
	       KERN_INFO "  rodata    = 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 "  bss       = 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
	       , _stext, _etext,
	       __start_rodata, __end_rodata,
	       _sdata, _edata,
	       (void*)&init_thread_union, (void*)((int)(&init_thread_union) + 0x2000),
	       __init_begin, __init_end,
	       __bss_start, __bss_stop,
	       (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
	       );

	/*
	 * 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 */
					 PAGE_OFFSET >> PAGE_SHIFT,
					 memory_end >> PAGE_SHIFT);
	/*
	 * free the usable memory,  we have to make sure we do not free
	 * the bootmem bitmap so we then reserve it after freeing it :-)
	 */
	free_bootmem(memory_start, memory_end - memory_start);

	reserve_bootmem(memory_start, bootmap_size);
	/*
	 * get kmalloc into gear
	 */
	paging_init();

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

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

#ifdef BF561_FAMILY
	_bfin_swrst = bfin_read_SICA_SWRST();
#else
	_bfin_swrst = bfin_read_SWRST();
#endif

	bf53x_cache_init();

	printk(KERN_INFO "Hardware Trace Enabled\n");
	bfin_write_TBUFCTL(0x03);

	/* 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);
}

static int __init topology_init(void)
{
#if defined (CONFIG_BF561)
	static struct cpu cpu[2];
	register_cpu(&cpu[0], 0);
	register_cpu(&cpu[1], 1);
	return 0;
#else
	static struct cpu cpu[1];
	return register_cpu(cpu, 0);
#endif
}

subsys_initcall(topology_init);

#if defined(CONFIG_BLKFIN_DCACHE) || defined(CONFIG_BLKFIN_CACHE)
static u16 __init lock_kernel_check(u32 start, u32 end)
{
	if ((start <= (u32) _stext && end >= (u32) _end)
	    || (start >= (u32) _stext && end <= (u32) _end))
		return IN_KERNEL;
	return 0;
}

static unsigned short __init
fill_cplbtab(struct cplb_tab *table,
	     unsigned long start, unsigned long end,
	     unsigned long block_size, unsigned long cplb_data)
{
	int i;

	switch (block_size) {
	case SIZE_4M:
		i = 3;
		break;
	case SIZE_1M:
		i = 2;
		break;
	case SIZE_4K:
		i = 1;
		break;
	case SIZE_1K:
	default:
		i = 0;
		break;
	}

	cplb_data = (cplb_data & ~(3 << 16)) | (i << 16);

	while ((start < end) && (table->pos < table->size)) {

		table->tab[table->pos++] = start;

		if (lock_kernel_check(start, start + block_size) == IN_KERNEL)
			table->tab[table->pos++] =
			    cplb_data | CPLB_LOCK | CPLB_DIRTY;
		else
			table->tab[table->pos++] = cplb_data;

		start += block_size;
	}
	return 0;
}

static unsigned short __init
close_cplbtab(struct cplb_tab *table)
{

	while (table->pos < table->size) {

		table->tab[table->pos++] = 0;
		table->tab[table->pos++] = 0; /* !CPLB_VALID */
	}
	return 0;
}

/* helper function */
static void __fill_code_cplbtab(struct cplb_tab *t, int i,
				u32 a_start, u32 a_end)
{
	if (cplb_data[i].psize) {
		fill_cplbtab(t,
				cplb_data[i].start,
				cplb_data[i].end,
				cplb_data[i].psize,
				cplb_data[i].i_conf);
	} else {
#if (defined(CONFIG_BLKFIN_CACHE) && defined(ANOMALY_05000263))
		if (i == SDRAM_KERN) {
			fill_cplbtab(t,
					cplb_data[i].start,
					cplb_data[i].end,
					SIZE_4M,
					cplb_data[i].i_conf);
		} else
#endif
		{
			fill_cplbtab(t,
					cplb_data[i].start,
					a_start,
					SIZE_1M,
					cplb_data[i].i_conf);
			fill_cplbtab(t,
					a_start,
					a_end,
					SIZE_4M,
					cplb_data[i].i_conf);
			fill_cplbtab(t, a_end,
					cplb_data[i].end,
					SIZE_1M,
					cplb_data[i].i_conf);
		}
	}
}

static void __fill_data_cplbtab(struct cplb_tab *t, int i,
				u32 a_start, u32 a_end)
{
	if (cplb_data[i].psize) {
		fill_cplbtab(t,
				cplb_data[i].start,
				cplb_data[i].end,
				cplb_data[i].psize,
				cplb_data[i].d_conf);
	} else {
		fill_cplbtab(t,
				cplb_data[i].start,
				a_start, SIZE_1M,
				cplb_data[i].d_conf);
		fill_cplbtab(t, a_start,
				a_end, SIZE_4M,
				cplb_data[i].d_conf);
		fill_cplbtab(t, a_end,
				cplb_data[i].end,
				SIZE_1M,
				cplb_data[i].d_conf);
	}
}
static void __init generate_cpl_tables(void)
{

	u16 i, j, process;
	u32 a_start, a_end, as, ae, as_1m;

	struct cplb_tab *t_i = NULL;
	struct cplb_tab *t_d = NULL;
	struct s_cplb cplb;

	cplb.init_i.size = MAX_CPLBS;
	cplb.init_d.size = MAX_CPLBS;
	cplb.switch_i.size = MAX_SWITCH_I_CPLBS;
	cplb.switch_d.size = MAX_SWITCH_D_CPLBS;

	cplb.init_i.pos = 0;
	cplb.init_d.pos = 0;
	cplb.switch_i.pos = 0;
	cplb.switch_d.pos = 0;

	cplb.init_i.tab = icplb_table;
	cplb.init_d.tab = dcplb_table;
	cplb.switch_i.tab = ipdt_table;
	cplb.switch_d.tab = dpdt_table;

	cplb_data[SDRAM_KERN].end = memory_end;

#ifdef CONFIG_MTD_UCLINUX
	cplb_data[SDRAM_RAM_MTD].start = memory_mtd_start;
	cplb_data[SDRAM_RAM_MTD].end = memory_mtd_start + mtd_size;
	cplb_data[SDRAM_RAM_MTD].valid = mtd_size > 0;
# if defined(CONFIG_ROMFS_FS)
	cplb_data[SDRAM_RAM_MTD].attr |= I_CPLB;

	/*
	 * The ROMFS_FS size is often not multiple of 1MB.
	 * This can cause multiple CPLB sets covering the same memory area.
	 * This will then cause multiple CPLB hit exceptions.
	 * Workaround: We ensure a contiguous memory area by extending the kernel
	 * memory section over the mtd section.
	 * For ROMFS_FS memory must be covered with ICPLBs anyways.
	 * So there is no difference between kernel and mtd memory setup.
	 */

	cplb_data[SDRAM_KERN].end = memory_mtd_start + mtd_size;;
	cplb_data[SDRAM_RAM_MTD].valid = 0;

# endif
#else
	cplb_data[SDRAM_RAM_MTD].valid = 0;
#endif

	cplb_data[SDRAM_DMAZ].start = _ramend - DMA_UNCACHED_REGION;
	cplb_data[SDRAM_DMAZ].end = _ramend;

	cplb_data[RES_MEM].start = _ramend;
	cplb_data[RES_MEM].end = physical_mem_end;

	if (reserved_mem_dcache_on)
		cplb_data[RES_MEM].d_conf = SDRAM_DGENERIC;
	else
		cplb_data[RES_MEM].d_conf = SDRAM_DNON_CHBL;

	if (reserved_mem_icache_on)
		cplb_data[RES_MEM].i_conf = SDRAM_IGENERIC;
	else
		cplb_data[RES_MEM].i_conf = SDRAM_INON_CHBL;

	for (i = ZERO_P; i <= L2_MEM; i++) {
		if (!cplb_data[i].valid)
			continue;

		as_1m = cplb_data[i].start % SIZE_1M;

		/*
		 * We need to make sure all sections are properly 1M aligned
		 * However between Kernel Memory and the Kernel mtd section,
		 * depending on the rootfs size, there can be overlapping
		 * memory areas.
		 */

		if (as_1m && i != L1I_MEM && i != L1D_MEM) {
#ifdef CONFIG_MTD_UCLINUX
			if (i == SDRAM_RAM_MTD) {
				if ((cplb_data[SDRAM_KERN].end + 1) >
						cplb_data[SDRAM_RAM_MTD].start)
					cplb_data[SDRAM_RAM_MTD].start =
						(cplb_data[i].start &
						 (-2*SIZE_1M)) + SIZE_1M;
				else
					cplb_data[SDRAM_RAM_MTD].start =
						(cplb_data[i].start &
						 (-2*SIZE_1M));
			} else
#endif
				printk(KERN_WARNING
					"Unaligned Start of %s at 0x%X\n",
					cplb_data[i].name, cplb_data[i].start);
		}

		as = cplb_data[i].start % SIZE_4M;
		ae = cplb_data[i].end % SIZE_4M;

		if (as)
			a_start = cplb_data[i].start + (SIZE_4M - (as));
		else
			a_start = cplb_data[i].start;

		a_end = cplb_data[i].end - ae;

		for (j = INITIAL_T; j <= SWITCH_T; j++) {

			switch (j) {
			case INITIAL_T:
				if (cplb_data[i].attr & INITIAL_T) {
					t_i = &cplb.init_i;
					t_d = &cplb.init_d;
					process = 1;
				} else
					process = 0;
				break;
			case SWITCH_T:
				if (cplb_data[i].attr & SWITCH_T) {
					t_i = &cplb.switch_i;
					t_d = &cplb.switch_d;
					process = 1;
				} else
					process = 0;
				break;
			default:
					process = 0;
				break;
			}

			if (!process)
				continue;
			if (cplb_data[i].attr & I_CPLB)
				__fill_code_cplbtab(t_i, i, a_start, a_end);

			if (cplb_data[i].attr & D_CPLB)
				__fill_data_cplbtab(t_d, i, a_start, a_end);
		}
	}

/* close tables */

	close_cplbtab(&cplb.init_i);
	close_cplbtab(&cplb.init_d);

	cplb.init_i.tab[cplb.init_i.pos] = -1;
	cplb.init_d.tab[cplb.init_d.pos] = -1;
	cplb.switch_i.tab[cplb.switch_i.pos] = -1;
	cplb.switch_d.tab[cplb.switch_d.pos] = -1;

}

#endif

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);

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

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

	seq_printf(m, "CPU:\t\tADSP-%s Rev. 0.%d\n"
		   "MMU:\t\t%s\n"
		   "FPU:\t\t%s\n"
		   "Core Clock:\t%9lu Hz\n"
		   "System Clock:\t%9lu Hz\n"
		   "BogoMips:\t%lu.%02lu\n"
		   "Calibration:\t%lu loops\n",
		   cpu, revid, mmu, fpu,
		   cclk,
		   sclk,
		   (loops_per_jiffy * HZ) / 500000,
		   ((loops_per_jiffy * HZ) / 5000) % 100,
		   (loops_per_jiffy * HZ));
	seq_printf(m, "Board Name:\t%s\n", name);
	seq_printf(m, "Board Memory:\t%ld MB\n", physical_mem_end >> 20);
	seq_printf(m, "Kernel Memory:\t%ld MB\n", (unsigned long)_ramend >> 20);
	if (bfin_read_IMEM_CONTROL() & (ENICPLB | IMC))
		seq_printf(m, "I-CACHE:\tON\n");
	else
		seq_printf(m, "I-CACHE:\tOFF\n");
	if ((bfin_read_DMEM_CONTROL()) & (ENDCPLB | DMC_ENABLE))
		seq_printf(m, "D-CACHE:\tON"
#if defined CONFIG_BLKFIN_WB
			   " (write-back)"
#elif defined CONFIG_BLKFIN_WT
			   " (write-through)"
#endif
			   "\n");
	else
		seq_printf(m, "D-CACHE:\tOFF\n");


	switch(bfin_read_DMEM_CONTROL() & (1 << DMC0_P | 1 << DMC1_P)) {
		case ACACHE_BSRAM:
			seq_printf(m, "DBANK-A:\tCACHE\n" "DBANK-B:\tSRAM\n");
			dcache_size = 16;
			dsup_banks = 1;
			break;
		case ACACHE_BCACHE:
			seq_printf(m, "DBANK-A:\tCACHE\n" "DBANK-B:\tCACHE\n");
			dcache_size = 32;
			dsup_banks = 2;
			break;
		case ASRAM_BSRAM:
			seq_printf(m, "DBANK-A:\tSRAM\n" "DBANK-B:\tSRAM\n");
			dcache_size = 0;
			dsup_banks = 0;
			break;
		default:
		break;
	}


	seq_printf(m, "I-CACHE Size:\t%dKB\n", BLKFIN_ICACHESIZE / 1024);
	seq_printf(m, "D-CACHE Size:\t%dKB\n", dcache_size);
	seq_printf(m, "I-CACHE Setup:\t%d Sub-banks/%d Ways, %d Lines/Way\n",
		   BLKFIN_ISUBBANKS, BLKFIN_IWAYS, BLKFIN_ILINES);
	seq_printf(m,
		   "D-CACHE Setup:\t%d Super-banks/%d Sub-banks/%d Ways, %d Lines/Way\n",
		   dsup_banks, BLKFIN_DSUBBANKS, BLKFIN_DWAYS,
		   BLKFIN_DLINES);
#ifdef CONFIG_BLKFIN_CACHE_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
	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)
{
}

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);
}