summaryrefslogtreecommitdiffstats
path: root/arch/mips/cavium-octeon/setup.c
blob: 48b08eb9d9e4bd29dc97f5ec97c3f763852ff4aa (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
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2004-2007 Cavium Networks
 * Copyright (C) 2008, 2009 Wind River Systems
 *   written by Ralf Baechle <ralf@linux-mips.org>
 */
#include <linux/compiler.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/export.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/serial.h>
#include <linux/smp.h>
#include <linux/types.h>
#include <linux/string.h>	/* for memset */
#include <linux/tty.h>
#include <linux/time.h>
#include <linux/platform_device.h>
#include <linux/serial_core.h>
#include <linux/serial_8250.h>
#include <linux/of_fdt.h>
#include <linux/libfdt.h>
#include <linux/kexec.h>

#include <asm/processor.h>
#include <asm/reboot.h>
#include <asm/smp-ops.h>
#include <asm/irq_cpu.h>
#include <asm/mipsregs.h>
#include <asm/bootinfo.h>
#include <asm/sections.h>
#include <asm/time.h>

#include <asm/octeon/octeon.h>
#include <asm/octeon/pci-octeon.h>
#include <asm/octeon/cvmx-mio-defs.h>

extern struct plat_smp_ops octeon_smp_ops;

#ifdef CONFIG_PCI
extern void pci_console_init(const char *arg);
#endif

static unsigned long long MAX_MEMORY = 512ull << 20;

struct octeon_boot_descriptor *octeon_boot_desc_ptr;

struct cvmx_bootinfo *octeon_bootinfo;
EXPORT_SYMBOL(octeon_bootinfo);

static unsigned long long RESERVE_LOW_MEM = 0ull;
#ifdef CONFIG_KEXEC
#ifdef CONFIG_SMP
/*
 * Wait for relocation code is prepared and send
 * secondary CPUs to spin until kernel is relocated.
 */
static void octeon_kexec_smp_down(void *ignored)
{
	int cpu = smp_processor_id();

	local_irq_disable();
	set_cpu_online(cpu, false);
	while (!atomic_read(&kexec_ready_to_reboot))
		cpu_relax();

	asm volatile (
	"	sync						\n"
	"	synci	($0)					\n");

	relocated_kexec_smp_wait(NULL);
}
#endif

#define OCTEON_DDR0_BASE    (0x0ULL)
#define OCTEON_DDR0_SIZE    (0x010000000ULL)
#define OCTEON_DDR1_BASE    (0x410000000ULL)
#define OCTEON_DDR1_SIZE    (0x010000000ULL)
#define OCTEON_DDR2_BASE    (0x020000000ULL)
#define OCTEON_DDR2_SIZE    (0x3e0000000ULL)
#define OCTEON_MAX_PHY_MEM_SIZE (16*1024*1024*1024ULL)

static struct kimage *kimage_ptr;

static void kexec_bootmem_init(uint64_t mem_size, uint32_t low_reserved_bytes)
{
	int64_t addr;
	struct cvmx_bootmem_desc *bootmem_desc;

	bootmem_desc = cvmx_bootmem_get_desc();

	if (mem_size > OCTEON_MAX_PHY_MEM_SIZE) {
		mem_size = OCTEON_MAX_PHY_MEM_SIZE;
		pr_err("Error: requested memory too large,"
		       "truncating to maximum size\n");
	}

	bootmem_desc->major_version = CVMX_BOOTMEM_DESC_MAJ_VER;
	bootmem_desc->minor_version = CVMX_BOOTMEM_DESC_MIN_VER;

	addr = (OCTEON_DDR0_BASE + RESERVE_LOW_MEM + low_reserved_bytes);
	bootmem_desc->head_addr = 0;

	if (mem_size <= OCTEON_DDR0_SIZE) {
		__cvmx_bootmem_phy_free(addr,
				mem_size - RESERVE_LOW_MEM -
				low_reserved_bytes, 0);
		return;
	}

	__cvmx_bootmem_phy_free(addr,
			OCTEON_DDR0_SIZE - RESERVE_LOW_MEM -
			low_reserved_bytes, 0);

	mem_size -= OCTEON_DDR0_SIZE;

	if (mem_size > OCTEON_DDR1_SIZE) {
		__cvmx_bootmem_phy_free(OCTEON_DDR1_BASE, OCTEON_DDR1_SIZE, 0);
		__cvmx_bootmem_phy_free(OCTEON_DDR2_BASE,
				mem_size - OCTEON_DDR1_SIZE, 0);
	} else
		__cvmx_bootmem_phy_free(OCTEON_DDR1_BASE, mem_size, 0);
}

static int octeon_kexec_prepare(struct kimage *image)
{
	int i;
	char *bootloader = "kexec";

	octeon_boot_desc_ptr->argc = 0;
	for (i = 0; i < image->nr_segments; i++) {
		if (!strncmp(bootloader, (char *)image->segment[i].buf,
				strlen(bootloader))) {
			/*
			 * convert command line string to array
			 * of parameters (as bootloader does).
			 */
			int argc = 0, offt;
			char *str = (char *)image->segment[i].buf;
			char *ptr = strchr(str, ' ');
			while (ptr && (OCTEON_ARGV_MAX_ARGS > argc)) {
				*ptr = '\0';
				if (ptr[1] != ' ') {
					offt = (int)(ptr - str + 1);
					octeon_boot_desc_ptr->argv[argc] =
						image->segment[i].mem + offt;
					argc++;
				}
				ptr = strchr(ptr + 1, ' ');
			}
			octeon_boot_desc_ptr->argc = argc;
			break;
		}
	}

	/*
	 * Information about segments will be needed during pre-boot memory
	 * initialization.
	 */
	kimage_ptr = image;
	return 0;
}

static void octeon_generic_shutdown(void)
{
	int i;
#ifdef CONFIG_SMP
	int cpu;
#endif
	struct cvmx_bootmem_desc *bootmem_desc;
	void *named_block_array_ptr;

	bootmem_desc = cvmx_bootmem_get_desc();
	named_block_array_ptr =
		cvmx_phys_to_ptr(bootmem_desc->named_block_array_addr);

#ifdef CONFIG_SMP
	/* disable watchdogs */
	for_each_online_cpu(cpu)
		cvmx_write_csr(CVMX_CIU_WDOGX(cpu_logical_map(cpu)), 0);
#else
	cvmx_write_csr(CVMX_CIU_WDOGX(cvmx_get_core_num()), 0);
#endif
	if (kimage_ptr != kexec_crash_image) {
		memset(named_block_array_ptr,
			0x0,
			CVMX_BOOTMEM_NUM_NAMED_BLOCKS *
			sizeof(struct cvmx_bootmem_named_block_desc));
		/*
		 * Mark all memory (except low 0x100000 bytes) as free.
		 * It is the same thing that bootloader does.
		 */
		kexec_bootmem_init(octeon_bootinfo->dram_size*1024ULL*1024ULL,
				0x100000);
		/*
		 * Allocate all segments to avoid their corruption during boot.
		 */
		for (i = 0; i < kimage_ptr->nr_segments; i++)
			cvmx_bootmem_alloc_address(
				kimage_ptr->segment[i].memsz + 2*PAGE_SIZE,
				kimage_ptr->segment[i].mem - PAGE_SIZE,
				PAGE_SIZE);
	} else {
		/*
		 * Do not mark all memory as free. Free only named sections
		 * leaving the rest of memory unchanged.
		 */
		struct cvmx_bootmem_named_block_desc *ptr =
			(struct cvmx_bootmem_named_block_desc *)
			named_block_array_ptr;

		for (i = 0; i < bootmem_desc->named_block_num_blocks; i++)
			if (ptr[i].size)
				cvmx_bootmem_free_named(ptr[i].name);
	}
	kexec_args[2] = 1UL; /* running on octeon_main_processor */
	kexec_args[3] = (unsigned long)octeon_boot_desc_ptr;
#ifdef CONFIG_SMP
	secondary_kexec_args[2] = 0UL; /* running on secondary cpu */
	secondary_kexec_args[3] = (unsigned long)octeon_boot_desc_ptr;
#endif
}

static void octeon_shutdown(void)
{
	octeon_generic_shutdown();
#ifdef CONFIG_SMP
	smp_call_function(octeon_kexec_smp_down, NULL, 0);
	smp_wmb();
	while (num_online_cpus() > 1) {
		cpu_relax();
		mdelay(1);
	}
#endif
}

static void octeon_crash_shutdown(struct pt_regs *regs)
{
	octeon_generic_shutdown();
	default_machine_crash_shutdown(regs);
}

#endif /* CONFIG_KEXEC */

#ifdef CONFIG_CAVIUM_RESERVE32
uint64_t octeon_reserve32_memory;
EXPORT_SYMBOL(octeon_reserve32_memory);
#endif

#ifdef CONFIG_KEXEC
/* crashkernel cmdline parameter is parsed _after_ memory setup
 * we also parse it here (workaround for EHB5200) */
static uint64_t crashk_size, crashk_base;
#endif

static int octeon_uart;

extern asmlinkage void handle_int(void);
extern asmlinkage void plat_irq_dispatch(void);

/**
 * Return non zero if we are currently running in the Octeon simulator
 *
 * Returns
 */
int octeon_is_simulation(void)
{
	return octeon_bootinfo->board_type == CVMX_BOARD_TYPE_SIM;
}
EXPORT_SYMBOL(octeon_is_simulation);

/**
 * Return true if Octeon is in PCI Host mode. This means
 * Linux can control the PCI bus.
 *
 * Returns Non zero if Octeon in host mode.
 */
int octeon_is_pci_host(void)
{
#ifdef CONFIG_PCI
	return octeon_bootinfo->config_flags & CVMX_BOOTINFO_CFG_FLAG_PCI_HOST;
#else
	return 0;
#endif
}

/**
 * Get the clock rate of Octeon
 *
 * Returns Clock rate in HZ
 */
uint64_t octeon_get_clock_rate(void)
{
	struct cvmx_sysinfo *sysinfo = cvmx_sysinfo_get();

	return sysinfo->cpu_clock_hz;
}
EXPORT_SYMBOL(octeon_get_clock_rate);

static u64 octeon_io_clock_rate;

u64 octeon_get_io_clock_rate(void)
{
	return octeon_io_clock_rate;
}
EXPORT_SYMBOL(octeon_get_io_clock_rate);


/**
 * Write to the LCD display connected to the bootbus. This display
 * exists on most Cavium evaluation boards. If it doesn't exist, then
 * this function doesn't do anything.
 *
 * @s:	    String to write
 */
void octeon_write_lcd(const char *s)
{
	if (octeon_bootinfo->led_display_base_addr) {
		void __iomem *lcd_address =
			ioremap_nocache(octeon_bootinfo->led_display_base_addr,
					8);
		int i;
		for (i = 0; i < 8; i++, s++) {
			if (*s)
				iowrite8(*s, lcd_address + i);
			else
				iowrite8(' ', lcd_address + i);
		}
		iounmap(lcd_address);
	}
}

/**
 * Return the console uart passed by the bootloader
 *
 * Returns uart	  (0 or 1)
 */
int octeon_get_boot_uart(void)
{
	int uart;
#ifdef CONFIG_CAVIUM_OCTEON_2ND_KERNEL
	uart = 1;
#else
	uart = (octeon_boot_desc_ptr->flags & OCTEON_BL_FLAG_CONSOLE_UART1) ?
		1 : 0;
#endif
	return uart;
}

/**
 * Get the coremask Linux was booted on.
 *
 * Returns Core mask
 */
int octeon_get_boot_coremask(void)
{
	return octeon_boot_desc_ptr->core_mask;
}

/**
 * Check the hardware BIST results for a CPU
 */
void octeon_check_cpu_bist(void)
{
	const int coreid = cvmx_get_core_num();
	unsigned long long mask;
	unsigned long long bist_val;

	/* Check BIST results for COP0 registers */
	mask = 0x1f00000000ull;
	bist_val = read_octeon_c0_icacheerr();
	if (bist_val & mask)
		pr_err("Core%d BIST Failure: CacheErr(icache) = 0x%llx\n",
		       coreid, bist_val);

	bist_val = read_octeon_c0_dcacheerr();
	if (bist_val & 1)
		pr_err("Core%d L1 Dcache parity error: "
		       "CacheErr(dcache) = 0x%llx\n",
		       coreid, bist_val);

	mask = 0xfc00000000000000ull;
	bist_val = read_c0_cvmmemctl();
	if (bist_val & mask)
		pr_err("Core%d BIST Failure: COP0_CVM_MEM_CTL = 0x%llx\n",
		       coreid, bist_val);

	write_octeon_c0_dcacheerr(0);
}

/**
 * Reboot Octeon
 *
 * @command: Command to pass to the bootloader. Currently ignored.
 */
static void octeon_restart(char *command)
{
	/* Disable all watchdogs before soft reset. They don't get cleared */
#ifdef CONFIG_SMP
	int cpu;
	for_each_online_cpu(cpu)
		cvmx_write_csr(CVMX_CIU_WDOGX(cpu_logical_map(cpu)), 0);
#else
	cvmx_write_csr(CVMX_CIU_WDOGX(cvmx_get_core_num()), 0);
#endif

	mb();
	while (1)
		cvmx_write_csr(CVMX_CIU_SOFT_RST, 1);
}


/**
 * Permanently stop a core.
 *
 * @arg: Ignored.
 */
static void octeon_kill_core(void *arg)
{
	if (octeon_is_simulation())
		/* A break instruction causes the simulator stop a core */
		asm volatile ("break" ::: "memory");

	local_irq_disable();
	/* Disable watchdog on this core. */
	cvmx_write_csr(CVMX_CIU_WDOGX(cvmx_get_core_num()), 0);
	/* Spin in a low power mode. */
	while (true)
		asm volatile ("wait" ::: "memory");
}


/**
 * Halt the system
 */
static void octeon_halt(void)
{
	smp_call_function(octeon_kill_core, NULL, 0);

	switch (octeon_bootinfo->board_type) {
	case CVMX_BOARD_TYPE_NAO38:
		/* Driving a 1 to GPIO 12 shuts off this board */
		cvmx_write_csr(CVMX_GPIO_BIT_CFGX(12), 1);
		cvmx_write_csr(CVMX_GPIO_TX_SET, 0x1000);
		break;
	default:
		octeon_write_lcd("PowerOff");
		break;
	}

	octeon_kill_core(NULL);
}

/**
 * Return a string representing the system type
 *
 * Returns
 */
const char *octeon_board_type_string(void)
{
	static char name[80];
	sprintf(name, "%s (%s)",
		cvmx_board_type_to_string(octeon_bootinfo->board_type),
		octeon_model_get_string(read_c0_prid()));
	return name;
}

const char *get_system_type(void)
	__attribute__ ((alias("octeon_board_type_string")));

void octeon_user_io_init(void)
{
	union octeon_cvmemctl cvmmemctl;
	union cvmx_iob_fau_timeout fau_timeout;
	union cvmx_pow_nw_tim nm_tim;

	/* Get the current settings for CP0_CVMMEMCTL_REG */
	cvmmemctl.u64 = read_c0_cvmmemctl();
	/* R/W If set, marked write-buffer entries time out the same
	 * as as other entries; if clear, marked write-buffer entries
	 * use the maximum timeout. */
	cvmmemctl.s.dismarkwblongto = 1;
	/* R/W If set, a merged store does not clear the write-buffer
	 * entry timeout state. */
	cvmmemctl.s.dismrgclrwbto = 0;
	/* R/W Two bits that are the MSBs of the resultant CVMSEG LM
	 * word location for an IOBDMA. The other 8 bits come from the
	 * SCRADDR field of the IOBDMA. */
	cvmmemctl.s.iobdmascrmsb = 0;
	/* R/W If set, SYNCWS and SYNCS only order marked stores; if
	 * clear, SYNCWS and SYNCS only order unmarked
	 * stores. SYNCWSMARKED has no effect when DISSYNCWS is
	 * set. */
	cvmmemctl.s.syncwsmarked = 0;
	/* R/W If set, SYNCWS acts as SYNCW and SYNCS acts as SYNC. */
	cvmmemctl.s.dissyncws = 0;
	/* R/W If set, no stall happens on write buffer full. */
	if (OCTEON_IS_MODEL(OCTEON_CN38XX_PASS2))
		cvmmemctl.s.diswbfst = 1;
	else
		cvmmemctl.s.diswbfst = 0;
	/* R/W If set (and SX set), supervisor-level loads/stores can
	 * use XKPHYS addresses with <48>==0 */
	cvmmemctl.s.xkmemenas = 0;

	/* R/W If set (and UX set), user-level loads/stores can use
	 * XKPHYS addresses with VA<48>==0 */
	cvmmemctl.s.xkmemenau = 0;

	/* R/W If set (and SX set), supervisor-level loads/stores can
	 * use XKPHYS addresses with VA<48>==1 */
	cvmmemctl.s.xkioenas = 0;

	/* R/W If set (and UX set), user-level loads/stores can use
	 * XKPHYS addresses with VA<48>==1 */
	cvmmemctl.s.xkioenau = 0;

	/* R/W If set, all stores act as SYNCW (NOMERGE must be set
	 * when this is set) RW, reset to 0. */
	cvmmemctl.s.allsyncw = 0;

	/* R/W If set, no stores merge, and all stores reach the
	 * coherent bus in order. */
	cvmmemctl.s.nomerge = 0;
	/* R/W Selects the bit in the counter used for DID time-outs 0
	 * = 231, 1 = 230, 2 = 229, 3 = 214. Actual time-out is
	 * between 1x and 2x this interval. For example, with
	 * DIDTTO=3, expiration interval is between 16K and 32K. */
	cvmmemctl.s.didtto = 0;
	/* R/W If set, the (mem) CSR clock never turns off. */
	cvmmemctl.s.csrckalwys = 0;
	/* R/W If set, mclk never turns off. */
	cvmmemctl.s.mclkalwys = 0;
	/* R/W Selects the bit in the counter used for write buffer
	 * flush time-outs (WBFLT+11) is the bit position in an
	 * internal counter used to determine expiration. The write
	 * buffer expires between 1x and 2x this interval. For
	 * example, with WBFLT = 0, a write buffer expires between 2K
	 * and 4K cycles after the write buffer entry is allocated. */
	cvmmemctl.s.wbfltime = 0;
	/* R/W If set, do not put Istream in the L2 cache. */
	cvmmemctl.s.istrnol2 = 0;

	/*
	 * R/W The write buffer threshold. As per erratum Core-14752
	 * for CN63XX, a sc/scd might fail if the write buffer is
	 * full.  Lowering WBTHRESH greatly lowers the chances of the
	 * write buffer ever being full and triggering the erratum.
	 */
	if (OCTEON_IS_MODEL(OCTEON_CN63XX_PASS1_X))
		cvmmemctl.s.wbthresh = 4;
	else
		cvmmemctl.s.wbthresh = 10;

	/* R/W If set, CVMSEG is available for loads/stores in
	 * kernel/debug mode. */
#if CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE > 0
	cvmmemctl.s.cvmsegenak = 1;
#else
	cvmmemctl.s.cvmsegenak = 0;
#endif
	/* R/W If set, CVMSEG is available for loads/stores in
	 * supervisor mode. */
	cvmmemctl.s.cvmsegenas = 0;
	/* R/W If set, CVMSEG is available for loads/stores in user
	 * mode. */
	cvmmemctl.s.cvmsegenau = 0;
	/* R/W Size of local memory in cache blocks, 54 (6912 bytes)
	 * is max legal value. */
	cvmmemctl.s.lmemsz = CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE;

	write_c0_cvmmemctl(cvmmemctl.u64);

	if (smp_processor_id() == 0)
		pr_notice("CVMSEG size: %d cache lines (%d bytes)\n",
			  CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE,
			  CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE * 128);

	/* Set a default for the hardware timeouts */
	fau_timeout.u64 = 0;
	fau_timeout.s.tout_val = 0xfff;
	/* Disable tagwait FAU timeout */
	fau_timeout.s.tout_enb = 0;
	cvmx_write_csr(CVMX_IOB_FAU_TIMEOUT, fau_timeout.u64);

	nm_tim.u64 = 0;
	/* 4096 cycles */
	nm_tim.s.nw_tim = 3;
	cvmx_write_csr(CVMX_POW_NW_TIM, nm_tim.u64);

	write_octeon_c0_icacheerr(0);
	write_c0_derraddr1(0);
}

/**
 * Early entry point for arch setup
 */
void __init prom_init(void)
{
	struct cvmx_sysinfo *sysinfo;
	const char *arg;
	char *p;
	int i;
	int argc;
#ifdef CONFIG_CAVIUM_RESERVE32
	int64_t addr = -1;
#endif
	/*
	 * The bootloader passes a pointer to the boot descriptor in
	 * $a3, this is available as fw_arg3.
	 */
	octeon_boot_desc_ptr = (struct octeon_boot_descriptor *)fw_arg3;
	octeon_bootinfo =
		cvmx_phys_to_ptr(octeon_boot_desc_ptr->cvmx_desc_vaddr);
	cvmx_bootmem_init(cvmx_phys_to_ptr(octeon_bootinfo->phy_mem_desc_addr));

	sysinfo = cvmx_sysinfo_get();
	memset(sysinfo, 0, sizeof(*sysinfo));
	sysinfo->system_dram_size = octeon_bootinfo->dram_size << 20;
	sysinfo->phy_mem_desc_ptr =
		cvmx_phys_to_ptr(octeon_bootinfo->phy_mem_desc_addr);
	sysinfo->core_mask = octeon_bootinfo->core_mask;
	sysinfo->exception_base_addr = octeon_bootinfo->exception_base_addr;
	sysinfo->cpu_clock_hz = octeon_bootinfo->eclock_hz;
	sysinfo->dram_data_rate_hz = octeon_bootinfo->dclock_hz * 2;
	sysinfo->board_type = octeon_bootinfo->board_type;
	sysinfo->board_rev_major = octeon_bootinfo->board_rev_major;
	sysinfo->board_rev_minor = octeon_bootinfo->board_rev_minor;
	memcpy(sysinfo->mac_addr_base, octeon_bootinfo->mac_addr_base,
	       sizeof(sysinfo->mac_addr_base));
	sysinfo->mac_addr_count = octeon_bootinfo->mac_addr_count;
	memcpy(sysinfo->board_serial_number,
	       octeon_bootinfo->board_serial_number,
	       sizeof(sysinfo->board_serial_number));
	sysinfo->compact_flash_common_base_addr =
		octeon_bootinfo->compact_flash_common_base_addr;
	sysinfo->compact_flash_attribute_base_addr =
		octeon_bootinfo->compact_flash_attribute_base_addr;
	sysinfo->led_display_base_addr = octeon_bootinfo->led_display_base_addr;
	sysinfo->dfa_ref_clock_hz = octeon_bootinfo->dfa_ref_clock_hz;
	sysinfo->bootloader_config_flags = octeon_bootinfo->config_flags;

	if (OCTEON_IS_MODEL(OCTEON_CN6XXX)) {
		/* I/O clock runs at a different rate than the CPU. */
		union cvmx_mio_rst_boot rst_boot;
		rst_boot.u64 = cvmx_read_csr(CVMX_MIO_RST_BOOT);
		octeon_io_clock_rate = 50000000 * rst_boot.s.pnr_mul;
	} else {
		octeon_io_clock_rate = sysinfo->cpu_clock_hz;
	}

	/*
	 * Only enable the LED controller if we're running on a CN38XX, CN58XX,
	 * or CN56XX. The CN30XX and CN31XX don't have an LED controller.
	 */
	if (!octeon_is_simulation() &&
	    octeon_has_feature(OCTEON_FEATURE_LED_CONTROLLER)) {
		cvmx_write_csr(CVMX_LED_EN, 0);
		cvmx_write_csr(CVMX_LED_PRT, 0);
		cvmx_write_csr(CVMX_LED_DBG, 0);
		cvmx_write_csr(CVMX_LED_PRT_FMT, 0);
		cvmx_write_csr(CVMX_LED_UDD_CNTX(0), 32);
		cvmx_write_csr(CVMX_LED_UDD_CNTX(1), 32);
		cvmx_write_csr(CVMX_LED_UDD_DATX(0), 0);
		cvmx_write_csr(CVMX_LED_UDD_DATX(1), 0);
		cvmx_write_csr(CVMX_LED_EN, 1);
	}
#ifdef CONFIG_CAVIUM_RESERVE32
	/*
	 * We need to temporarily allocate all memory in the reserve32
	 * region. This makes sure the kernel doesn't allocate this
	 * memory when it is getting memory from the
	 * bootloader. Later, after the memory allocations are
	 * complete, the reserve32 will be freed.
	 *
	 * Allocate memory for RESERVED32 aligned on 2MB boundary. This
	 * is in case we later use hugetlb entries with it.
	 */
	addr = cvmx_bootmem_phy_named_block_alloc(CONFIG_CAVIUM_RESERVE32 << 20,
						0, 0, 2 << 20,
						"CAVIUM_RESERVE32", 0);
	if (addr < 0)
		pr_err("Failed to allocate CAVIUM_RESERVE32 memory area\n");
	else
		octeon_reserve32_memory = addr;
#endif

#ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2
	if (cvmx_read_csr(CVMX_L2D_FUS3) & (3ull << 34)) {
		pr_info("Skipping L2 locking due to reduced L2 cache size\n");
	} else {
		uint32_t __maybe_unused ebase = read_c0_ebase() & 0x3ffff000;
#ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_TLB
		/* TLB refill */
		cvmx_l2c_lock_mem_region(ebase, 0x100);
#endif
#ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_EXCEPTION
		/* General exception */
		cvmx_l2c_lock_mem_region(ebase + 0x180, 0x80);
#endif
#ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_LOW_LEVEL_INTERRUPT
		/* Interrupt handler */
		cvmx_l2c_lock_mem_region(ebase + 0x200, 0x80);
#endif
#ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_INTERRUPT
		cvmx_l2c_lock_mem_region(__pa_symbol(handle_int), 0x100);
		cvmx_l2c_lock_mem_region(__pa_symbol(plat_irq_dispatch), 0x80);
#endif
#ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_MEMCPY
		cvmx_l2c_lock_mem_region(__pa_symbol(memcpy), 0x480);
#endif
	}
#endif

	octeon_check_cpu_bist();

	octeon_uart = octeon_get_boot_uart();

#ifdef CONFIG_SMP
	octeon_write_lcd("LinuxSMP");
#else
	octeon_write_lcd("Linux");
#endif

#ifdef CONFIG_CAVIUM_GDB
	/*
	 * When debugging the linux kernel, force the cores to enter
	 * the debug exception handler to break in.
	 */
	if (octeon_get_boot_debug_flag()) {
		cvmx_write_csr(CVMX_CIU_DINT, 1 << cvmx_get_core_num());
		cvmx_read_csr(CVMX_CIU_DINT);
	}
#endif

	octeon_setup_delays();

	/*
	 * BIST should always be enabled when doing a soft reset. L2
	 * Cache locking for instance is not cleared unless BIST is
	 * enabled.  Unfortunately due to a chip errata G-200 for
	 * Cn38XX and CN31XX, BIST msut be disabled on these parts.
	 */
	if (OCTEON_IS_MODEL(OCTEON_CN38XX_PASS2) ||
	    OCTEON_IS_MODEL(OCTEON_CN31XX))
		cvmx_write_csr(CVMX_CIU_SOFT_BIST, 0);
	else
		cvmx_write_csr(CVMX_CIU_SOFT_BIST, 1);

	/* Default to 64MB in the simulator to speed things up */
	if (octeon_is_simulation())
		MAX_MEMORY = 64ull << 20;

	arg = strstr(arcs_cmdline, "mem=");
	if (arg) {
		MAX_MEMORY = memparse(arg + 4, &p);
		if (MAX_MEMORY == 0)
			MAX_MEMORY = 32ull << 30;
		if (*p == '@')
			RESERVE_LOW_MEM = memparse(p + 1, &p);
	}

	arcs_cmdline[0] = 0;
	argc = octeon_boot_desc_ptr->argc;
	for (i = 0; i < argc; i++) {
		const char *arg =
			cvmx_phys_to_ptr(octeon_boot_desc_ptr->argv[i]);
		if ((strncmp(arg, "MEM=", 4) == 0) ||
		    (strncmp(arg, "mem=", 4) == 0)) {
			MAX_MEMORY = memparse(arg + 4, &p);
			if (MAX_MEMORY == 0)
				MAX_MEMORY = 32ull << 30;
			if (*p == '@')
				RESERVE_LOW_MEM = memparse(p + 1, &p);
		} else if (strcmp(arg, "ecc_verbose") == 0) {
#ifdef CONFIG_CAVIUM_REPORT_SINGLE_BIT_ECC
			__cvmx_interrupt_ecc_report_single_bit_errors = 1;
			pr_notice("Reporting of single bit ECC errors is "
				  "turned on\n");
#endif
#ifdef CONFIG_KEXEC
		} else if (strncmp(arg, "crashkernel=", 12) == 0) {
			crashk_size = memparse(arg+12, &p);
			if (*p == '@')
				crashk_base = memparse(p+1, &p);
			strcat(arcs_cmdline, " ");
			strcat(arcs_cmdline, arg);
			/*
			 * To do: switch parsing to new style, something like:
			 * parse_crashkernel(arg, sysinfo->system_dram_size,
			 *		  &crashk_size, &crashk_base);
			 */
#endif
		} else if (strlen(arcs_cmdline) + strlen(arg) + 1 <
			   sizeof(arcs_cmdline) - 1) {
			strcat(arcs_cmdline, " ");
			strcat(arcs_cmdline, arg);
		}
	}

	if (strstr(arcs_cmdline, "console=") == NULL) {
#ifdef CONFIG_CAVIUM_OCTEON_2ND_KERNEL
		strcat(arcs_cmdline, " console=ttyS0,115200");
#else
		if (octeon_uart == 1)
			strcat(arcs_cmdline, " console=ttyS1,115200");
		else
			strcat(arcs_cmdline, " console=ttyS0,115200");
#endif
	}

	if (octeon_is_simulation()) {
		/*
		 * The simulator uses a mtdram device pre filled with
		 * the filesystem. Also specify the calibration delay
		 * to avoid calculating it every time.
		 */
		strcat(arcs_cmdline, " rw root=1f00 slram=root,0x40000000,+1073741824");
	}

	mips_hpt_frequency = octeon_get_clock_rate();

	octeon_init_cvmcount();

	_machine_restart = octeon_restart;
	_machine_halt = octeon_halt;

#ifdef CONFIG_KEXEC
	_machine_kexec_shutdown = octeon_shutdown;
	_machine_crash_shutdown = octeon_crash_shutdown;
	_machine_kexec_prepare = octeon_kexec_prepare;
#endif

	octeon_user_io_init();
	register_smp_ops(&octeon_smp_ops);
}

/* Exclude a single page from the regions obtained in plat_mem_setup. */
#ifndef CONFIG_CRASH_DUMP
static __init void memory_exclude_page(u64 addr, u64 *mem, u64 *size)
{
	if (addr > *mem && addr < *mem + *size) {
		u64 inc = addr - *mem;
		add_memory_region(*mem, inc, BOOT_MEM_RAM);
		*mem += inc;
		*size -= inc;
	}

	if (addr == *mem && *size > PAGE_SIZE) {
		*mem += PAGE_SIZE;
		*size -= PAGE_SIZE;
	}
}
#endif /* CONFIG_CRASH_DUMP */

void __init plat_mem_setup(void)
{
	uint64_t mem_alloc_size;
	uint64_t total;
	uint64_t crashk_end;
#ifndef CONFIG_CRASH_DUMP
	int64_t memory;
	uint64_t kernel_start;
	uint64_t kernel_size;
#endif

	total = 0;
	crashk_end = 0;

	/*
	 * The Mips memory init uses the first memory location for
	 * some memory vectors. When SPARSEMEM is in use, it doesn't
	 * verify that the size is big enough for the final
	 * vectors. Making the smallest chuck 4MB seems to be enough
	 * to consistently work.
	 */
	mem_alloc_size = 4 << 20;
	if (mem_alloc_size > MAX_MEMORY)
		mem_alloc_size = MAX_MEMORY;

/* Crashkernel ignores bootmem list. It relies on mem=X@Y option */
#ifdef CONFIG_CRASH_DUMP
	add_memory_region(RESERVE_LOW_MEM, MAX_MEMORY, BOOT_MEM_RAM);
	total += MAX_MEMORY;
#else
#ifdef CONFIG_KEXEC
	if (crashk_size > 0) {
		add_memory_region(crashk_base, crashk_size, BOOT_MEM_RAM);
		crashk_end = crashk_base + crashk_size;
	}
#endif
	/*
	 * When allocating memory, we want incrementing addresses from
	 * bootmem_alloc so the code in add_memory_region can merge
	 * regions next to each other.
	 */
	cvmx_bootmem_lock();
	while ((boot_mem_map.nr_map < BOOT_MEM_MAP_MAX)
		&& (total < MAX_MEMORY)) {
		memory = cvmx_bootmem_phy_alloc(mem_alloc_size,
						__pa_symbol(&__init_end), -1,
						0x100000,
						CVMX_BOOTMEM_FLAG_NO_LOCKING);
		if (memory >= 0) {
			u64 size = mem_alloc_size;
#ifdef CONFIG_KEXEC
			uint64_t end;
#endif

			/*
			 * exclude a page at the beginning and end of
			 * the 256MB PCIe 'hole' so the kernel will not
			 * try to allocate multi-page buffers that
			 * span the discontinuity.
			 */
			memory_exclude_page(CVMX_PCIE_BAR1_PHYS_BASE,
					    &memory, &size);
			memory_exclude_page(CVMX_PCIE_BAR1_PHYS_BASE +
					    CVMX_PCIE_BAR1_PHYS_SIZE,
					    &memory, &size);
#ifdef CONFIG_KEXEC
			end = memory + mem_alloc_size;

			/*
			 * This function automatically merges address regions
			 * next to each other if they are received in
			 * incrementing order
			 */
			if (memory < crashk_base && end >  crashk_end) {
				/* region is fully in */
				add_memory_region(memory,
						  crashk_base - memory,
						  BOOT_MEM_RAM);
				total += crashk_base - memory;
				add_memory_region(crashk_end,
						  end - crashk_end,
						  BOOT_MEM_RAM);
				total += end - crashk_end;
				continue;
			}

			if (memory >= crashk_base && end <= crashk_end)
				/*
				 * Entire memory region is within the new
				 *  kernel's memory, ignore it.
				 */
				continue;

			if (memory > crashk_base && memory < crashk_end &&
			    end > crashk_end) {
				/*
				 * Overlap with the beginning of the region,
				 * reserve the beginning.
				  */
				mem_alloc_size -= crashk_end - memory;
				memory = crashk_end;
			} else if (memory < crashk_base && end > crashk_base &&
				   end < crashk_end)
				/*
				 * Overlap with the beginning of the region,
				 * chop of end.
				 */
				mem_alloc_size -= end - crashk_base;
#endif
			add_memory_region(memory, mem_alloc_size, BOOT_MEM_RAM);
			total += mem_alloc_size;
			/* Recovering mem_alloc_size */
			mem_alloc_size = 4 << 20;
		} else {
			break;
		}
	}
	cvmx_bootmem_unlock();
	/* Add the memory region for the kernel. */
	kernel_start = (unsigned long) _text;
	kernel_size = _end - _text;

	/* Adjust for physical offset. */
	kernel_start &= ~0xffffffff80000000ULL;
	add_memory_region(kernel_start, kernel_size, BOOT_MEM_RAM);
#endif /* CONFIG_CRASH_DUMP */

#ifdef CONFIG_CAVIUM_RESERVE32
	/*
	 * Now that we've allocated the kernel memory it is safe to
	 * free the reserved region. We free it here so that builtin
	 * drivers can use the memory.
	 */
	if (octeon_reserve32_memory)
		cvmx_bootmem_free_named("CAVIUM_RESERVE32");
#endif /* CONFIG_CAVIUM_RESERVE32 */

	if (total == 0)
		panic("Unable to allocate memory from "
		      "cvmx_bootmem_phy_alloc\n");
}

/*
 * Emit one character to the boot UART.	 Exported for use by the
 * watchdog timer.
 */
int prom_putchar(char c)
{
	uint64_t lsrval;

	/* Spin until there is room */
	do {
		lsrval = cvmx_read_csr(CVMX_MIO_UARTX_LSR(octeon_uart));
	} while ((lsrval & 0x20) == 0);

	/* Write the byte */
	cvmx_write_csr(CVMX_MIO_UARTX_THR(octeon_uart), c & 0xffull);
	return 1;
}
EXPORT_SYMBOL(prom_putchar);

void prom_free_prom_memory(void)
{
	if (OCTEON_IS_MODEL(OCTEON_CN63XX_PASS1_X)) {
		/* Check for presence of Core-14449 fix.  */
		u32 insn;
		u32 *foo;

		foo = &insn;

		asm volatile("# before" : : : "memory");
		prefetch(foo);
		asm volatile(
			".set push\n\t"
			".set noreorder\n\t"
			"bal 1f\n\t"
			"nop\n"
			"1:\tlw %0,-12($31)\n\t"
			".set pop\n\t"
			: "=r" (insn) : : "$31", "memory");

		if ((insn >> 26) != 0x33)
			panic("No PREF instruction at Core-14449 probe point.");

		if (((insn >> 16) & 0x1f) != 28)
			panic("Core-14449 WAR not in place (%04x).\n"
			      "Please build kernel with proper options (CONFIG_CAVIUM_CN63XXP1).", insn);
	}
}

int octeon_prune_device_tree(void);

extern const char __dtb_octeon_3xxx_begin;
extern const char __dtb_octeon_3xxx_end;
extern const char __dtb_octeon_68xx_begin;
extern const char __dtb_octeon_68xx_end;
void __init device_tree_init(void)
{
	int dt_size;
	struct boot_param_header *fdt;
	bool do_prune;

	if (octeon_bootinfo->minor_version >= 3 && octeon_bootinfo->fdt_addr) {
		fdt = phys_to_virt(octeon_bootinfo->fdt_addr);
		if (fdt_check_header(fdt))
			panic("Corrupt Device Tree passed to kernel.");
		dt_size = be32_to_cpu(fdt->totalsize);
		do_prune = false;
	} else if (OCTEON_IS_MODEL(OCTEON_CN68XX)) {
		fdt = (struct boot_param_header *)&__dtb_octeon_68xx_begin;
		dt_size = &__dtb_octeon_68xx_end - &__dtb_octeon_68xx_begin;
		do_prune = true;
	} else {
		fdt = (struct boot_param_header *)&__dtb_octeon_3xxx_begin;
		dt_size = &__dtb_octeon_3xxx_end - &__dtb_octeon_3xxx_begin;
		do_prune = true;
	}

	/* Copy the default tree from init memory. */
	initial_boot_params = early_init_dt_alloc_memory_arch(dt_size, 8);
	if (initial_boot_params == NULL)
		panic("Could not allocate initial_boot_params\n");
	memcpy(initial_boot_params, fdt, dt_size);

	if (do_prune) {
		octeon_prune_device_tree();
		pr_info("Using internal Device Tree.\n");
	} else {
		pr_info("Using passed Device Tree.\n");
	}
	unflatten_device_tree();
}

static int __initdata disable_octeon_edac_p;

static int __init disable_octeon_edac(char *str)
{
	disable_octeon_edac_p = 1;
	return 0;
}
early_param("disable_octeon_edac", disable_octeon_edac);

static char *edac_device_names[] = {
	"octeon_l2c_edac",
	"octeon_pc_edac",
};

static int __init edac_devinit(void)
{
	struct platform_device *dev;
	int i, err = 0;
	int num_lmc;
	char *name;

	if (disable_octeon_edac_p)
		return 0;

	for (i = 0; i < ARRAY_SIZE(edac_device_names); i++) {
		name = edac_device_names[i];
		dev = platform_device_register_simple(name, -1, NULL, 0);
		if (IS_ERR(dev)) {
			pr_err("Registation of %s failed!\n", name);
			err = PTR_ERR(dev);
		}
	}

	num_lmc = OCTEON_IS_MODEL(OCTEON_CN68XX) ? 4 :
		(OCTEON_IS_MODEL(OCTEON_CN56XX) ? 2 : 1);
	for (i = 0; i < num_lmc; i++) {
		dev = platform_device_register_simple("octeon_lmc_edac",
						      i, NULL, 0);
		if (IS_ERR(dev)) {
			pr_err("Registation of octeon_lmc_edac %d failed!\n", i);
			err = PTR_ERR(dev);
		}
	}

	return err;
}
device_initcall(edac_devinit);
OpenPOWER on IntegriCloud