summaryrefslogtreecommitdiff
path: root/common/board_f.c
blob: 81edbdf8e45b5899cab64d798d4c9f510afa3809 (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
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
/*
 * Copyright (c) 2011 The Chromium OS Authors.
 * (C) Copyright 2002-2006
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * (C) Copyright 2002
 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 * Marius Groeger <mgroeger@sysgo.de>
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <linux/compiler.h>
#include <version.h>
#include <environment.h>
#include <fdtdec.h>
#include <fs.h>
#if defined(CONFIG_CMD_IDE)
#include <ide.h>
#endif
#include <i2c.h>
#include <initcall.h>
#include <logbuff.h>

/* TODO: Can we move these into arch/ headers? */
#ifdef CONFIG_8xx
#include <mpc8xx.h>
#endif
#ifdef CONFIG_5xx
#include <mpc5xx.h>
#endif
#ifdef CONFIG_MPC5xxx
#include <mpc5xxx.h>
#endif

#include <os.h>
#include <post.h>
#include <spi.h>
#include <watchdog.h>
#include <asm/errno.h>
#include <asm/io.h>
#ifdef CONFIG_MP
#include <asm/mp.h>
#endif
#include <asm/sections.h>
#ifdef CONFIG_X86
#include <asm/init_helpers.h>
#include <asm/relocate.h>
#endif
#ifdef CONFIG_SANDBOX
#include <asm/state.h>
#endif
#include <linux/compiler.h>

/*
 * Pointer to initial global data area
 *
 * Here we initialize it if needed.
 */
#ifdef XTRN_DECLARE_GLOBAL_DATA_PTR
#undef	XTRN_DECLARE_GLOBAL_DATA_PTR
#define XTRN_DECLARE_GLOBAL_DATA_PTR	/* empty = allocate here */
DECLARE_GLOBAL_DATA_PTR = (gd_t *) (CONFIG_SYS_INIT_GD_ADDR);
#else
DECLARE_GLOBAL_DATA_PTR;
#endif

/*
 * sjg: IMO this code should be
 * refactored to a single function, something like:
 *
 * void led_set_state(enum led_colour_t colour, int on);
 */
/************************************************************************
 * Coloured LED functionality
 ************************************************************************
 * May be supplied by boards if desired
 */
inline void __coloured_LED_init(void) {}
void coloured_LED_init(void)
	__attribute__((weak, alias("__coloured_LED_init")));
inline void __red_led_on(void) {}
void red_led_on(void) __attribute__((weak, alias("__red_led_on")));
inline void __red_led_off(void) {}
void red_led_off(void) __attribute__((weak, alias("__red_led_off")));
inline void __green_led_on(void) {}
void green_led_on(void) __attribute__((weak, alias("__green_led_on")));
inline void __green_led_off(void) {}
void green_led_off(void) __attribute__((weak, alias("__green_led_off")));
inline void __yellow_led_on(void) {}
void yellow_led_on(void) __attribute__((weak, alias("__yellow_led_on")));
inline void __yellow_led_off(void) {}
void yellow_led_off(void) __attribute__((weak, alias("__yellow_led_off")));
inline void __blue_led_on(void) {}
void blue_led_on(void) __attribute__((weak, alias("__blue_led_on")));
inline void __blue_led_off(void) {}
void blue_led_off(void) __attribute__((weak, alias("__blue_led_off")));

/*
 * Why is gd allocated a register? Prior to reloc it might be better to
 * just pass it around to each function in this file?
 *
 * After reloc one could argue that it is hardly used and doesn't need
 * to be in a register. Or if it is it should perhaps hold pointers to all
 * global data for all modules, so that post-reloc we can avoid the massive
 * literal pool we get on ARM. Or perhaps just encourage each module to use
 * a structure...
 */

/*
 * Could the CONFIG_SPL_BUILD infection become a flag in gd?
 */

#if defined(CONFIG_WATCHDOG)
static int init_func_watchdog_init(void)
{
	puts("       Watchdog enabled\n");
	WATCHDOG_RESET();

	return 0;
}

int init_func_watchdog_reset(void)
{
	WATCHDOG_RESET();

	return 0;
}
#endif /* CONFIG_WATCHDOG */

void __board_add_ram_info(int use_default)
{
	/* please define platform specific board_add_ram_info() */
}

void board_add_ram_info(int)
	__attribute__ ((weak, alias("__board_add_ram_info")));

static int init_baud_rate(void)
{
	gd->baudrate = getenv_ulong("baudrate", 10, CONFIG_BAUDRATE);
	return 0;
}

static int display_text_info(void)
{
#ifndef CONFIG_SANDBOX
	ulong bss_start, bss_end;

#ifdef CONFIG_SYS_SYM_OFFSETS
	bss_start = _bss_start_ofs + _TEXT_BASE;
	bss_end = _bss_end_ofs + _TEXT_BASE;
#else
	bss_start = (ulong)&__bss_start;
	bss_end = (ulong)&__bss_end;
#endif
	debug("U-Boot code: %08X -> %08lX  BSS: -> %08lX\n",
	      CONFIG_SYS_TEXT_BASE, bss_start, bss_end);
#endif

#ifdef CONFIG_MODEM_SUPPORT
	debug("Modem Support enabled\n");
#endif
#ifdef CONFIG_USE_IRQ
	debug("IRQ Stack: %08lx\n", IRQ_STACK_START);
	debug("FIQ Stack: %08lx\n", FIQ_STACK_START);
#endif

	return 0;
}

static int announce_dram_init(void)
{
	puts("DRAM:  ");
	return 0;
}

#ifdef CONFIG_PPC
static int init_func_ram(void)
{
#ifdef	CONFIG_BOARD_TYPES
	int board_type = gd->board_type;
#else
	int board_type = 0;	/* use dummy arg */
#endif

	gd->ram_size = initdram(board_type);

	if (gd->ram_size > 0)
		return 0;

	puts("*** failed ***\n");
	return 1;
}
#endif

static int show_dram_config(void)
{
	ulong size;

#ifdef CONFIG_NR_DRAM_BANKS
	int i;

	debug("\nRAM Configuration:\n");
	for (i = size = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
		size += gd->bd->bi_dram[i].size;
		debug("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
#ifdef DEBUG
		print_size(gd->bd->bi_dram[i].size, "\n");
#endif
	}
	debug("\nDRAM:  ");
#else
	size = gd->ram_size;
#endif

	print_size(size, "");
	board_add_ram_info(0);
	putc('\n');

	return 0;
}

ulong get_effective_memsize(void)
{
#ifndef	CONFIG_VERY_BIG_RAM
	return gd->ram_size;
#else
	/* limit stack to what we can reasonable map */
	return ((gd->ram_size > CONFIG_MAX_MEM_MAPPED) ?
		CONFIG_MAX_MEM_MAPPED : gd->ram_size);
#endif
}

void __dram_init_banksize(void)
{
#if defined(CONFIG_NR_DRAM_BANKS) && defined(CONFIG_SYS_SDRAM_BASE)
	gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
	gd->bd->bi_dram[0].size = get_effective_memsize();
#endif
}

void dram_init_banksize(void)
	__attribute__((weak, alias("__dram_init_banksize")));

#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
static int init_func_i2c(void)
{
	puts("I2C:   ");
	i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
	puts("ready\n");
	return 0;
}
#endif

#if defined(CONFIG_HARD_SPI)
static int init_func_spi(void)
{
	puts("SPI:   ");
	spi_init();
	puts("ready\n");
	return 0;
}
#endif

__maybe_unused
static int zero_global_data(void)
{
	memset((void *)gd, '\0', sizeof(gd_t));

	return 0;
}

static int setup_mon_len(void)
{
#ifdef CONFIG_SYS_SYM_OFFSETS
	gd->mon_len = _bss_end_ofs;
#elif defined(CONFIG_SANDBOX)
	gd->mon_len = (ulong)&_end - (ulong)_init;
#else
	/* TODO: use (ulong)&__bss_end - (ulong)&__text_start; ? */
	gd->mon_len = (ulong)&__bss_end - CONFIG_SYS_MONITOR_BASE;
#endif
	return 0;
}

__weak int arch_cpu_init(void)
{
	return 0;
}

#ifdef CONFIG_OF_HOSTFILE

#define CHECK(x)		err = (x); if (err) goto failed;

/* Create an empty device tree blob */
static int make_empty_fdt(void *fdt)
{
	int err;

	CHECK(fdt_create(fdt, 256));
	CHECK(fdt_finish_reservemap(fdt));
	CHECK(fdt_begin_node(fdt, ""));
	CHECK(fdt_end_node(fdt));
	CHECK(fdt_finish(fdt));

	return 0;
failed:
	printf("Unable to create empty FDT: %s\n", fdt_strerror(err));
	return -EACCES;
}

static int read_fdt_from_file(void)
{
	struct sandbox_state *state = state_get_current();
	void *blob;
	int size;
	int err;

	blob = map_sysmem(CONFIG_SYS_FDT_LOAD_ADDR, 0);
	if (!state->fdt_fname) {
		err = make_empty_fdt(blob);
		if (!err)
			goto done;
		return err;
	}
	err = fs_set_blk_dev("host", NULL, FS_TYPE_SANDBOX);
	if (err)
		return err;
	size = fs_read(state->fdt_fname, CONFIG_SYS_FDT_LOAD_ADDR, 0, 0);
	if (size < 0)
		return -EIO;

done:
	gd->fdt_blob = blob;

	return 0;
}
#endif

#ifdef CONFIG_SANDBOX
static int setup_ram_buf(void)
{
	gd->arch.ram_buf = os_malloc(CONFIG_SYS_SDRAM_SIZE);
	assert(gd->arch.ram_buf);
	gd->ram_size = CONFIG_SYS_SDRAM_SIZE;

	return 0;
}
#endif

static int setup_fdt(void)
{
#ifdef CONFIG_OF_EMBED
	/* Get a pointer to the FDT */
	gd->fdt_blob = _binary_dt_dtb_start;
#elif defined CONFIG_OF_SEPARATE
	/* FDT is at end of image */
# ifdef CONFIG_SYS_SYM_OFFSETS
	gd->fdt_blob = (void *)(_end_ofs + CONFIG_SYS_TEXT_BASE);
# else
	gd->fdt_blob = (ulong *)&_end;
# endif
#elif defined(CONFIG_OF_HOSTFILE)
	if (read_fdt_from_file()) {
		puts("Failed to read control FDT\n");
		return -1;
	}
#endif
	/* Allow the early environment to override the fdt address */
	gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16,
						(uintptr_t)gd->fdt_blob);
	return 0;
}

/* Get the top of usable RAM */
__weak ulong board_get_usable_ram_top(ulong total_size)
{
	return gd->ram_top;
}

static int setup_dest_addr(void)
{
	debug("Monitor len: %08lX\n", gd->mon_len);
	/*
	 * Ram is setup, size stored in gd !!
	 */
	debug("Ram size: %08lX\n", (ulong)gd->ram_size);
#if defined(CONFIG_SYS_MEM_TOP_HIDE)
	/*
	 * Subtract specified amount of memory to hide so that it won't
	 * get "touched" at all by U-Boot. By fixing up gd->ram_size
	 * the Linux kernel should now get passed the now "corrected"
	 * memory size and won't touch it either. This should work
	 * for arch/ppc and arch/powerpc. Only Linux board ports in
	 * arch/powerpc with bootwrapper support, that recalculate the
	 * memory size from the SDRAM controller setup will have to
	 * get fixed.
	 */
	gd->ram_size -= CONFIG_SYS_MEM_TOP_HIDE;
#endif
#ifdef CONFIG_SYS_SDRAM_BASE
	gd->ram_top = CONFIG_SYS_SDRAM_BASE;
#endif
	gd->ram_top += get_effective_memsize();
	gd->ram_top = board_get_usable_ram_top(gd->mon_len);
	gd->dest_addr = gd->ram_top;
	debug("Ram top: %08lX\n", (ulong)gd->ram_top);
#if defined(CONFIG_MP) && (defined(CONFIG_MPC86xx) || defined(CONFIG_E500))
	/*
	 * We need to make sure the location we intend to put secondary core
	 * boot code is reserved and not used by any part of u-boot
	 */
	if (gd->dest_addr > determine_mp_bootpg(NULL)) {
		gd->dest_addr = determine_mp_bootpg(NULL);
		debug("Reserving MP boot page to %08lx\n", gd->dest_addr);
	}
#endif
	gd->dest_addr_sp = gd->dest_addr;
	return 0;
}

#if defined(CONFIG_LOGBUFFER) && !defined(CONFIG_ALT_LB_ADDR)
static int reserve_logbuffer(void)
{
	/* reserve kernel log buffer */
	gd->dest_addr -= LOGBUFF_RESERVE;
	debug("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN,
		gd->dest_addr);
	return 0;
}
#endif

#ifdef CONFIG_PRAM
/* reserve protected RAM */
static int reserve_pram(void)
{
	ulong reg;

	reg = getenv_ulong("pram", 10, CONFIG_PRAM);
	gd->dest_addr -= (reg << 10);		/* size is in kB */
	debug("Reserving %ldk for protected RAM at %08lx\n", reg,
	      gd->dest_addr);
	return 0;
}
#endif /* CONFIG_PRAM */

/* Round memory pointer down to next 4 kB limit */
static int reserve_round_4k(void)
{
	gd->dest_addr &= ~(4096 - 1);
	return 0;
}

#if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF)) && \
		defined(CONFIG_ARM)
static int reserve_mmu(void)
{
	/* reserve TLB table */
	gd->arch.tlb_size = 4096 * 4;
	gd->dest_addr -= gd->arch.tlb_size;

	/* round down to next 64 kB limit */
	gd->dest_addr &= ~(0x10000 - 1);

	gd->arch.tlb_addr = gd->dest_addr;
	debug("TLB table from %08lx to %08lx\n", gd->arch.tlb_addr,
	      gd->arch.tlb_addr + gd->arch.tlb_size);
	return 0;
}
#endif

#ifdef CONFIG_LCD
static int reserve_lcd(void)
{
#ifdef CONFIG_FB_ADDR
	gd->fb_base = CONFIG_FB_ADDR;
#else
	/* reserve memory for LCD display (always full pages) */
	gd->dest_addr = lcd_setmem(gd->dest_addr);
	gd->fb_base = gd->dest_addr;
#endif /* CONFIG_FB_ADDR */
	return 0;
}
#endif /* CONFIG_LCD */

#if defined(CONFIG_VIDEO) && (!defined(CONFIG_PPC) || defined(CONFIG_8xx)) \
		&& !defined(CONFIG_ARM) && !defined(CONFIG_X86)
static int reserve_video(void)
{
	/* reserve memory for video display (always full pages) */
	gd->dest_addr = video_setmem(gd->dest_addr);
	gd->fb_base = gd->dest_addr;

	return 0;
}
#endif

static int reserve_uboot(void)
{
	/*
	 * reserve memory for U-Boot code, data & bss
	 * round down to next 4 kB limit
	 */
	gd->dest_addr -= gd->mon_len;
	gd->dest_addr &= ~(4096 - 1);
#ifdef CONFIG_E500
	/* round down to next 64 kB limit so that IVPR stays aligned */
	gd->dest_addr &= ~(65536 - 1);
#endif

	debug("Reserving %ldk for U-Boot at: %08lx\n", gd->mon_len >> 10,
	      gd->dest_addr);
	return 0;
}

#ifndef CONFIG_SPL_BUILD
/* reserve memory for malloc() area */
static int reserve_malloc(void)
{
	gd->dest_addr_sp = gd->dest_addr - TOTAL_MALLOC_LEN;
	debug("Reserving %dk for malloc() at: %08lx\n",
			TOTAL_MALLOC_LEN >> 10, gd->dest_addr_sp);
	return 0;
}

/* (permanently) allocate a Board Info struct */
static int reserve_board(void)
{
	gd->dest_addr_sp -= sizeof(bd_t);
	gd->bd = (bd_t *)map_sysmem(gd->dest_addr_sp, sizeof(bd_t));
	memset(gd->bd, '\0', sizeof(bd_t));
	debug("Reserving %zu Bytes for Board Info at: %08lx\n",
			sizeof(bd_t), gd->dest_addr_sp);
	return 0;
}
#endif

static int setup_machine(void)
{
#ifdef CONFIG_MACH_TYPE
	gd->bd->bi_arch_number = CONFIG_MACH_TYPE; /* board id for Linux */
#endif
	return 0;
}

static int reserve_global_data(void)
{
	gd->dest_addr_sp -= sizeof(gd_t);
	gd->new_gd = (gd_t *)map_sysmem(gd->dest_addr_sp, sizeof(gd_t));
	debug("Reserving %zu Bytes for Global Data at: %08lx\n",
			sizeof(gd_t), gd->dest_addr_sp);
	return 0;
}

static int reserve_fdt(void)
{
	/*
	 * If the device tree is sitting immediate above our image then we
	 * must relocate it. If it is embedded in the data section, then it
	 * will be relocated with other data.
	 */
	if (gd->fdt_blob) {
		gd->fdt_size = ALIGN(fdt_totalsize(gd->fdt_blob) + 0x1000, 32);

		gd->dest_addr_sp -= gd->fdt_size;
		gd->new_fdt = map_sysmem(gd->dest_addr_sp, gd->fdt_size);
		debug("Reserving %lu Bytes for FDT at: %08lx\n",
		      gd->fdt_size, gd->dest_addr_sp);
	}

	return 0;
}

static int reserve_stacks(void)
{
#ifdef CONFIG_SPL_BUILD
# ifdef CONFIG_ARM
	gd->dest_addr_sp -= 128;	/* leave 32 words for abort-stack */
	gd->irq_sp = gd->dest_addr_sp;
# endif
#else
# ifdef CONFIG_PPC
	ulong *s;
# endif

	/* setup stack pointer for exceptions */
	gd->dest_addr_sp -= 16;
	gd->dest_addr_sp &= ~0xf;
	gd->irq_sp = gd->dest_addr_sp;

	/*
	 * Handle architecture-specific things here
	 * TODO(sjg@chromium.org): Perhaps create arch_reserve_stack()
	 * to handle this and put in arch/xxx/lib/stack.c
	 */
# ifdef CONFIG_ARM
#  ifdef CONFIG_USE_IRQ
	gd->dest_addr_sp -= (CONFIG_STACKSIZE_IRQ + CONFIG_STACKSIZE_FIQ);
	debug("Reserving %zu Bytes for IRQ stack at: %08lx\n",
		CONFIG_STACKSIZE_IRQ + CONFIG_STACKSIZE_FIQ, gd->dest_addr_sp);

	/* 8-byte alignment for ARM ABI compliance */
	gd->dest_addr_sp &= ~0x07;
#  endif
	/* leave 3 words for abort-stack, plus 1 for alignment */
	gd->dest_addr_sp -= 16;
# elif defined(CONFIG_PPC)
	/* Clear initial stack frame */
	s = (ulong *) gd->dest_addr_sp;
	*s = 0; /* Terminate back chain */
	*++s = 0; /* NULL return address */
# endif /* Architecture specific code */

	return 0;
#endif
}

static int display_new_sp(void)
{
	debug("New Stack Pointer is: %08lx\n", gd->dest_addr_sp);

	return 0;
}

#ifdef CONFIG_PPC
static int setup_board_part1(void)
{
	bd_t *bd = gd->bd;

	/*
	 * Save local variables to board info struct
	 */

	bd->bi_memstart = CONFIG_SYS_SDRAM_BASE;	/* start of memory */
	bd->bi_memsize = gd->ram_size;			/* size in bytes */

#ifdef CONFIG_SYS_SRAM_BASE
	bd->bi_sramstart = CONFIG_SYS_SRAM_BASE;	/* start of SRAM */
	bd->bi_sramsize = CONFIG_SYS_SRAM_SIZE;		/* size  of SRAM */
#endif

#if defined(CONFIG_8xx) || defined(CONFIG_8260) || defined(CONFIG_5xx) || \
		defined(CONFIG_E500) || defined(CONFIG_MPC86xx)
	bd->bi_immr_base = CONFIG_SYS_IMMR;	/* base  of IMMR register     */
#endif
#if defined(CONFIG_MPC5xxx)
	bd->bi_mbar_base = CONFIG_SYS_MBAR;	/* base of internal registers */
#endif
#if defined(CONFIG_MPC83xx)
	bd->bi_immrbar = CONFIG_SYS_IMMR;
#endif

	return 0;
}

static int setup_board_part2(void)
{
	bd_t *bd = gd->bd;

	bd->bi_intfreq = gd->cpu_clk;	/* Internal Freq, in Hz */
	bd->bi_busfreq = gd->bus_clk;	/* Bus Freq,      in Hz */
#if defined(CONFIG_CPM2)
	bd->bi_cpmfreq = gd->arch.cpm_clk;
	bd->bi_brgfreq = gd->arch.brg_clk;
	bd->bi_sccfreq = gd->arch.scc_clk;
	bd->bi_vco = gd->arch.vco_out;
#endif /* CONFIG_CPM2 */
#if defined(CONFIG_MPC512X)
	bd->bi_ipsfreq = gd->arch.ips_clk;
#endif /* CONFIG_MPC512X */
#if defined(CONFIG_MPC5xxx)
	bd->bi_ipbfreq = gd->arch.ipb_clk;
	bd->bi_pcifreq = gd->pci_clk;
#endif /* CONFIG_MPC5xxx */

	return 0;
}
#endif

#ifdef CONFIG_SYS_EXTBDINFO
static int setup_board_extra(void)
{
	bd_t *bd = gd->bd;

	strncpy((char *) bd->bi_s_version, "1.2", sizeof(bd->bi_s_version));
	strncpy((char *) bd->bi_r_version, U_BOOT_VERSION,
		sizeof(bd->bi_r_version));

	bd->bi_procfreq = gd->cpu_clk;	/* Processor Speed, In Hz */
	bd->bi_plb_busfreq = gd->bus_clk;
#if defined(CONFIG_405GP) || defined(CONFIG_405EP) || \
		defined(CONFIG_440EP) || defined(CONFIG_440GR) || \
		defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
	bd->bi_pci_busfreq = get_PCI_freq();
	bd->bi_opbfreq = get_OPB_freq();
#elif defined(CONFIG_XILINX_405)
	bd->bi_pci_busfreq = get_PCI_freq();
#endif

	return 0;
}
#endif

#ifdef CONFIG_POST
static int init_post(void)
{
	post_bootmode_init();
	post_run(NULL, POST_ROM | post_bootmode_get(0));

	return 0;
}
#endif

static int setup_baud_rate(void)
{
	/* Ick, can we get rid of this line? */
	gd->bd->bi_baudrate = gd->baudrate;

	return 0;
}

static int setup_dram_config(void)
{
	/* Ram is board specific, so move it to board code ... */
	dram_init_banksize();

	return 0;
}

static int reloc_fdt(void)
{
	if (gd->new_fdt) {
		memcpy(gd->new_fdt, gd->fdt_blob, gd->fdt_size);
		gd->fdt_blob = gd->new_fdt;
	}

	return 0;
}

static int setup_reloc(void)
{
	gd->relocaddr = gd->dest_addr;
	gd->start_addr_sp = gd->dest_addr_sp;
	gd->reloc_off = gd->dest_addr - CONFIG_SYS_TEXT_BASE;
	memcpy(gd->new_gd, (char *)gd, sizeof(gd_t));

	debug("Relocation Offset is: %08lx\n", gd->reloc_off);
	debug("Relocating to %08lx, new gd at %08lx, sp at %08lx\n",
	      gd->dest_addr, (ulong)map_to_sysmem(gd->new_gd),
	      gd->dest_addr_sp);

	return 0;
}

/* ARM calls relocate_code from its crt0.S */
#if !defined(CONFIG_ARM)

static int jump_to_copy(void)
{
	/*
	 * x86 is special, but in a nice way. It uses a trampoline which
	 * enables the dcache if possible.
	 *
	 * For now, other archs use relocate_code(), which is implemented
	 * similarly for all archs. When we do generic relocation, hopefully
	 * we can make all archs enable the dcache prior to relocation.
	 */
#ifdef CONFIG_X86
	/*
	 * SDRAM and console are now initialised. The final stack can now
	 * be setup in SDRAM. Code execution will continue in Flash, but
	 * with the stack in SDRAM and Global Data in temporary memory
	 * (CPU cache)
	 */
	board_init_f_r_trampoline(gd->start_addr_sp);
#elif defined(CONFIG_SANDBOX)
	board_init_r(gd->new_gd, 0);
#else
	relocate_code(gd->dest_addr_sp, gd->new_gd, gd->dest_addr);
#endif

	return 0;
}
#endif

/* Record the board_init_f() bootstage (after arch_cpu_init()) */
static int mark_bootstage(void)
{
	bootstage_mark_name(BOOTSTAGE_ID_START_UBOOT_F, "board_init_f");

	return 0;
}

static init_fnc_t init_sequence_f[] = {
#if !defined(CONFIG_CPM2) && !defined(CONFIG_MPC512X) && \
		!defined(CONFIG_MPC83xx) && !defined(CONFIG_MPC85xx) && \
		!defined(CONFIG_MPC86xx) && !defined(CONFIG_X86)
	zero_global_data,
#endif
#ifdef CONFIG_SANDBOX
	setup_ram_buf,
#endif
	setup_fdt,
	setup_mon_len,
#if defined(CONFIG_MPC85xx) || defined(CONFIG_MPC86xx)
	/* TODO: can this go into arch_cpu_init()? */
	probecpu,
#endif
	arch_cpu_init,		/* basic arch cpu dependent setup */
#ifdef CONFIG_X86
	cpu_init_f,		/* TODO(sjg@chromium.org): remove */
# ifdef CONFIG_OF_CONTROL
	find_fdt,		/* TODO(sjg@chromium.org): remove */
# endif
#endif
	mark_bootstage,
#ifdef CONFIG_OF_CONTROL
	fdtdec_check_fdt,
#endif
#if defined(CONFIG_BOARD_EARLY_INIT_F)
	board_early_init_f,
#endif
	/* TODO: can any of this go into arch_cpu_init()? */
#if defined(CONFIG_PPC) && !defined(CONFIG_8xx_CPUCLK_DEFAULT)
	get_clocks,		/* get CPU and bus clocks (etc.) */
#if defined(CONFIG_TQM8xxL) && !defined(CONFIG_TQM866M) \
		&& !defined(CONFIG_TQM885D)
	adjust_sdram_tbs_8xx,
#endif
	/* TODO: can we rename this to timer_init()? */
	init_timebase,
#endif
#ifdef CONFIG_ARM
	timer_init,		/* initialize timer */
#endif
#ifdef CONFIG_BOARD_POSTCLK_INIT
	board_postclk_init,
#endif
#ifdef CONFIG_FSL_ESDHC
	get_clocks,
#endif
#ifdef CONFIG_SYS_ALLOC_DPRAM
#if !defined(CONFIG_CPM2)
	dpram_init,
#endif
#endif
#if defined(CONFIG_BOARD_POSTCLK_INIT)
	board_postclk_init,
#endif
	env_init,		/* initialize environment */
#if defined(CONFIG_8xx_CPUCLK_DEFAULT)
	/* get CPU and bus clocks according to the environment variable */
	get_clocks_866,
	/* adjust sdram refresh rate according to the new clock */
	sdram_adjust_866,
	init_timebase,
#endif
	init_baud_rate,		/* initialze baudrate settings */
	serial_init,		/* serial communications setup */
	console_init_f,		/* stage 1 init of console */
#ifdef CONFIG_SANDBOX
	sandbox_early_getopt_check,
#endif
#ifdef CONFIG_OF_CONTROL
	fdtdec_prepare_fdt,
#endif
	display_options,	/* say that we are here */
	display_text_info,	/* show debugging info if required */
#if defined(CONFIG_8260)
	prt_8260_rsr,
	prt_8260_clks,
#endif /* CONFIG_8260 */
#if defined(CONFIG_MPC83xx)
	prt_83xx_rsr,
#endif
#ifdef CONFIG_PPC
	checkcpu,
#endif
#if defined(CONFIG_DISPLAY_CPUINFO)
	print_cpuinfo,		/* display cpu info (and speed) */
#endif
#if defined(CONFIG_MPC5xxx)
	prt_mpc5xxx_clks,
#endif /* CONFIG_MPC5xxx */
#if defined(CONFIG_DISPLAY_BOARDINFO)
	checkboard,		/* display board info */
#endif
	INIT_FUNC_WATCHDOG_INIT
#if defined(CONFIG_MISC_INIT_F)
	misc_init_f,
#endif
	INIT_FUNC_WATCHDOG_RESET
#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
	init_func_i2c,
#endif
#if defined(CONFIG_HARD_SPI)
	init_func_spi,
#endif
#ifdef CONFIG_X86
	dram_init_f,		/* configure available RAM banks */
	calculate_relocation_address,
#endif
	announce_dram_init,
	/* TODO: unify all these dram functions? */
#ifdef CONFIG_ARM
	dram_init,		/* configure available RAM banks */
#endif
#ifdef CONFIG_PPC
	init_func_ram,
#endif
#ifdef CONFIG_POST
	post_init_f,
#endif
	INIT_FUNC_WATCHDOG_RESET
#if defined(CONFIG_SYS_DRAM_TEST)
	testdram,
#endif /* CONFIG_SYS_DRAM_TEST */
	INIT_FUNC_WATCHDOG_RESET

#ifdef CONFIG_POST
	init_post,
#endif
	INIT_FUNC_WATCHDOG_RESET
	/*
	 * Now that we have DRAM mapped and working, we can
	 * relocate the code and continue running from DRAM.
	 *
	 * Reserve memory at end of RAM for (top down in that order):
	 *  - area that won't get touched by U-Boot and Linux (optional)
	 *  - kernel log buffer
	 *  - protected RAM
	 *  - LCD framebuffer
	 *  - monitor code
	 *  - board info struct
	 */
	setup_dest_addr,
#if defined(CONFIG_LOGBUFFER) && !defined(CONFIG_ALT_LB_ADDR)
	reserve_logbuffer,
#endif
#ifdef CONFIG_PRAM
	reserve_pram,
#endif
	reserve_round_4k,
#if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF)) && \
		defined(CONFIG_ARM)
	reserve_mmu,
#endif
#ifdef CONFIG_LCD
	reserve_lcd,
#endif
	/* TODO: Why the dependency on CONFIG_8xx? */
#if defined(CONFIG_VIDEO) && (!defined(CONFIG_PPC) || defined(CONFIG_8xx)) \
		&& !defined(CONFIG_ARM) && !defined(CONFIG_X86)
	reserve_video,
#endif
	reserve_uboot,
#ifndef CONFIG_SPL_BUILD
	reserve_malloc,
	reserve_board,
#endif
	setup_machine,
	reserve_global_data,
	reserve_fdt,
	reserve_stacks,
	setup_dram_config,
	show_dram_config,
#ifdef CONFIG_PPC
	setup_board_part1,
	INIT_FUNC_WATCHDOG_RESET
	setup_board_part2,
#endif
	setup_baud_rate,
	display_new_sp,
#ifdef CONFIG_SYS_EXTBDINFO
	setup_board_extra,
#endif
	INIT_FUNC_WATCHDOG_RESET
	reloc_fdt,
	setup_reloc,
#ifndef CONFIG_ARM
	jump_to_copy,
#endif
	NULL,
};

void board_init_f(ulong boot_flags)
{
#ifndef CONFIG_X86
	gd_t data;

	gd = &data;
#endif

	gd->flags = boot_flags;

	if (initcall_run_list(init_sequence_f))
		hang();

#ifndef CONFIG_ARM
	/* NOTREACHED - jump_to_copy() does not return */
	hang();
#endif
}

#ifdef CONFIG_X86
/*
 * For now this code is only used on x86.
 *
 * init_sequence_f_r is the list of init functions which are run when
 * U-Boot is executing from Flash with a semi-limited 'C' environment.
 * The following limitations must be considered when implementing an
 * '_f_r' function:
 *  - 'static' variables are read-only
 *  - Global Data (gd->xxx) is read/write
 *
 * The '_f_r' sequence must, as a minimum, copy U-Boot to RAM (if
 * supported).  It _should_, if possible, copy global data to RAM and
 * initialise the CPU caches (to speed up the relocation process)
 *
 * NOTE: At present only x86 uses this route, but it is intended that
 * all archs will move to this when generic relocation is implemented.
 */
static init_fnc_t init_sequence_f_r[] = {
	init_cache_f_r,
	copy_uboot_to_ram,
	clear_bss,
	do_elf_reloc_fixups,

	NULL,
};

void board_init_f_r(void)
{
	if (initcall_run_list(init_sequence_f_r))
		hang();

	/*
	 * U-Boot has been copied into SDRAM, the BSS has been cleared etc.
	 * Transfer execution from Flash to RAM by calculating the address
	 * of the in-RAM copy of board_init_r() and calling it
	 */
	(board_init_r + gd->reloc_off)(gd, gd->relocaddr);

	/* NOTREACHED - board_init_r() does not return */
	hang();
}
#endif /* CONFIG_X86 */