aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/edac/amd64_edac.h
blob: 8ea07e2715dcad85ec1faa03e4921066ce6fb514 (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
/*
 * AMD64 class Memory Controller kernel module
 *
 * Copyright (c) 2009 SoftwareBitMaker.
 * Copyright (c) 2009 Advanced Micro Devices, Inc.
 *
 * This file may be distributed under the terms of the
 * GNU General Public License.
 *
 *	Originally Written by Thayne Harbaugh
 *
 *      Changes by Douglas "norsk" Thompson  <dougthompson@xmission.com>:
 *		- K8 CPU Revision D and greater support
 *
 *      Changes by Dave Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>:
 *		- Module largely rewritten, with new (and hopefully correct)
 *		code for dealing with node and chip select interleaving,
 *		various code cleanup, and bug fixes
 *		- Added support for memory hoisting using DRAM hole address
 *		register
 *
 *	Changes by Douglas "norsk" Thompson <dougthompson@xmission.com>:
 *		-K8 Rev (1207) revision support added, required Revision
 *		specific mini-driver code to support Rev F as well as
 *		prior revisions
 *
 *	Changes by Douglas "norsk" Thompson <dougthompson@xmission.com>:
 *		-Family 10h revision support added. New PCI Device IDs,
 *		indicating new changes. Actual registers modified
 *		were slight, less than the Rev E to Rev F transition
 *		but changing the PCI Device ID was the proper thing to
 *		do, as it provides for almost automactic family
 *		detection. The mods to Rev F required more family
 *		information detection.
 *
 *	Changes/Fixes by Borislav Petkov <borislav.petkov@amd.com>:
 *		- misc fixes and code cleanups
 *
 * This module is based on the following documents
 * (available from http://www.amd.com/):
 *
 *	Title:	BIOS and Kernel Developer's Guide for AMD Athlon 64 and AMD
 *		Opteron Processors
 *	AMD publication #: 26094
 *`	Revision: 3.26
 *
 *	Title:	BIOS and Kernel Developer's Guide for AMD NPT Family 0Fh
 *		Processors
 *	AMD publication #: 32559
 *	Revision: 3.00
 *	Issue Date: May 2006
 *
 *	Title:	BIOS and Kernel Developer's Guide (BKDG) For AMD Family 10h
 *		Processors
 *	AMD publication #: 31116
 *	Revision: 3.00
 *	Issue Date: September 07, 2007
 *
 * Sections in the first 2 documents are no longer in sync with each other.
 * The Family 10h BKDG was totally re-written from scratch with a new
 * presentation model.
 * Therefore, comments that refer to a Document section might be off.
 */

#include <linux/module.h>
#include <linux/ctype.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/pci_ids.h>
#include <linux/slab.h>
#include <linux/mmzone.h>
#include <linux/edac.h>
#include <asm/msr.h>
#include "edac_core.h"
#include "edac_mce_amd.h"

#define amd64_printk(level, fmt, arg...) \
	edac_printk(level, "amd64", fmt, ##arg)

#define amd64_mc_printk(mci, level, fmt, arg...) \
	edac_mc_chipset_printk(mci, level, "amd64", fmt, ##arg)

/*
 * Throughout the comments in this code, the following terms are used:
 *
 *	SysAddr, DramAddr, and InputAddr
 *
 *  These terms come directly from the amd64 documentation
 * (AMD publication #26094).  They are defined as follows:
 *
 *     SysAddr:
 *         This is a physical address generated by a CPU core or a device
 *         doing DMA.  If generated by a CPU core, a SysAddr is the result of
 *         a virtual to physical address translation by the CPU core's address
 *         translation mechanism (MMU).
 *
 *     DramAddr:
 *         A DramAddr is derived from a SysAddr by subtracting an offset that
 *         depends on which node the SysAddr maps to and whether the SysAddr
 *         is within a range affected by memory hoisting.  The DRAM Base
 *         (section 3.4.4.1) and DRAM Limit (section 3.4.4.2) registers
 *         determine which node a SysAddr maps to.
 *
 *         If the DRAM Hole Address Register (DHAR) is enabled and the SysAddr
 *         is within the range of addresses specified by this register, then
 *         a value x from the DHAR is subtracted from the SysAddr to produce a
 *         DramAddr.  Here, x represents the base address for the node that
 *         the SysAddr maps to plus an offset due to memory hoisting.  See
 *         section 3.4.8 and the comments in amd64_get_dram_hole_info() and
 *         sys_addr_to_dram_addr() below for more information.
 *
 *         If the SysAddr is not affected by the DHAR then a value y is
 *         subtracted from the SysAddr to produce a DramAddr.  Here, y is the
 *         base address for the node that the SysAddr maps to.  See section
 *         3.4.4 and the comments in sys_addr_to_dram_addr() below for more
 *         information.
 *
 *     InputAddr:
 *         A DramAddr is translated to an InputAddr before being passed to the
 *         memory controller for the node that the DramAddr is associated
 *         with.  The memory controller then maps the InputAddr to a csrow.
 *         If node interleaving is not in use, then the InputAddr has the same
 *         value as the DramAddr.  Otherwise, the InputAddr is produced by
 *         discarding the bits used for node interleaving from the DramAddr.
 *         See section 3.4.4 for more information.
 *
 *         The memory controller for a given node uses its DRAM CS Base and
 *         DRAM CS Mask registers to map an InputAddr to a csrow.  See
 *         sections 3.5.4 and 3.5.5 for more information.
 */

#define EDAC_AMD64_VERSION		" Ver: 3.2.0 " __DATE__
#define EDAC_MOD_STR			"amd64_edac"

/* Extended Model from CPUID, for CPU Revision numbers */
#define OPTERON_CPU_LE_REV_C		0
#define OPTERON_CPU_REV_D		1
#define OPTERON_CPU_REV_E		2

/* NPT processors have the following Extended Models */
#define OPTERON_CPU_REV_F		4
#define OPTERON_CPU_REV_FA		5

/* Hardware limit on ChipSelect rows per MC and processors per system */
#define CHIPSELECT_COUNT		8
#define DRAM_REG_COUNT			8


/*
 * PCI-defined configuration space registers
 */


/*
 * Function 1 - Address Map
 */
#define K8_DRAM_BASE_LOW		0x40
#define K8_DRAM_LIMIT_LOW		0x44
#define K8_DHAR				0xf0

#define DHAR_VALID			BIT(0)
#define F10_DRAM_MEM_HOIST_VALID	BIT(1)

#define DHAR_BASE_MASK			0xff000000
#define dhar_base(dhar)			(dhar & DHAR_BASE_MASK)

#define K8_DHAR_OFFSET_MASK		0x0000ff00
#define k8_dhar_offset(dhar)		((dhar & K8_DHAR_OFFSET_MASK) << 16)

#define F10_DHAR_OFFSET_MASK		0x0000ff80
					/* NOTE: Extra mask bit vs K8 */
#define f10_dhar_offset(dhar)		((dhar & F10_DHAR_OFFSET_MASK) << 16)


/* F10 High BASE/LIMIT registers */
#define F10_DRAM_BASE_HIGH		0x140
#define F10_DRAM_LIMIT_HIGH		0x144


/*
 * Function 2 - DRAM controller
 */
#define K8_DCSB0			0x40
#define F10_DCSB1			0x140

#define K8_DCSB_CS_ENABLE		BIT(0)
#define K8_DCSB_NPT_SPARE		BIT(1)
#define K8_DCSB_NPT_TESTFAIL		BIT(2)

/*
 * REV E: select [31:21] and [15:9] from DCSB and the shift amount to form
 * the address
 */
#define REV_E_DCSB_BASE_BITS		(0xFFE0FE00ULL)
#define REV_E_DCS_SHIFT			4
#define REV_E_DCSM_COUNT		8

#define REV_F_F1Xh_DCSB_BASE_BITS	(0x1FF83FE0ULL)
#define REV_F_F1Xh_DCS_SHIFT		8

/*
 * REV F and later: selects [28:19] and [13:5] from DCSB and the shift amount
 * to form the address
 */
#define REV_F_DCSB_BASE_BITS		(0x1FF83FE0ULL)
#define REV_F_DCS_SHIFT			8
#define REV_F_DCSM_COUNT		4
#define F10_DCSM_COUNT			4
#define F11_DCSM_COUNT			2

/* DRAM CS Mask Registers */
#define K8_DCSM0			0x60
#define F10_DCSM1			0x160

/* REV E: select [29:21] and [15:9] from DCSM */
#define REV_E_DCSM_MASK_BITS		0x3FE0FE00

/* unused bits [24:20] and [12:0] */
#define REV_E_DCS_NOTUSED_BITS		0x01F01FFF

/* REV F and later: select [28:19] and [13:5] from DCSM */
#define REV_F_F1Xh_DCSM_MASK_BITS	0x1FF83FE0

/* unused bits [26:22] and [12:0] */
#define REV_F_F1Xh_DCS_NOTUSED_BITS	0x07C01FFF

#define DBAM0				0x80
#define DBAM1				0x180

/* Extract the DIMM 'type' on the i'th DIMM from the DBAM reg value passed */
#define DBAM_DIMM(i, reg)		((((reg) >> (4*i))) & 0xF)

#define DBAM_MAX_VALUE			11


#define F10_DCLR_0			0x90
#define F10_DCLR_1			0x190
#define REVE_WIDTH_128			BIT(16)
#define F10_WIDTH_128			BIT(11)


#define F10_DCHR_0			0x94
#define F10_DCHR_1			0x194

#define F10_DCHR_FOUR_RANK_DIMM		BIT(18)
#define F10_DCHR_Ddr3Mode		BIT(8)
#define F10_DCHR_MblMode		BIT(6)


#define F10_DCTL_SEL_LOW		0x110

#define dct_sel_baseaddr(pvt)    \
	((pvt->dram_ctl_select_low) & 0xFFFFF800)

#define dct_sel_interleave_addr(pvt)    \
	(((pvt->dram_ctl_select_low) >> 6) & 0x3)

enum {
	F10_DCTL_SEL_LOW_DctSelHiRngEn	= BIT(0),
	F10_DCTL_SEL_LOW_DctSelIntLvEn	= BIT(2),
	F10_DCTL_SEL_LOW_DctGangEn	= BIT(4),
	F10_DCTL_SEL_LOW_DctDatIntLv	= BIT(5),
	F10_DCTL_SEL_LOW_DramEnable	= BIT(8),
	F10_DCTL_SEL_LOW_MemCleared	= BIT(10),
};

#define    dct_high_range_enabled(pvt)    \
	(pvt->dram_ctl_select_low & F10_DCTL_SEL_LOW_DctSelHiRngEn)

#define dct_interleave_enabled(pvt)	   \
	(pvt->dram_ctl_select_low & F10_DCTL_SEL_LOW_DctSelIntLvEn)

#define dct_ganging_enabled(pvt)        \
	(pvt->dram_ctl_select_low & F10_DCTL_SEL_LOW_DctGangEn)

#define dct_data_intlv_enabled(pvt)    \
	(pvt->dram_ctl_select_low & F10_DCTL_SEL_LOW_DctDatIntLv)

#define dct_dram_enabled(pvt)    \
	(pvt->dram_ctl_select_low & F10_DCTL_SEL_LOW_DramEnable)

#define dct_memory_cleared(pvt)    \
	(pvt->dram_ctl_select_low & F10_DCTL_SEL_LOW_MemCleared)


#define F10_DCTL_SEL_HIGH		0x114


/*
 * Function 3 - Misc Control
 */
#define K8_NBCTL			0x40

/* Correctable ECC error reporting enable */
#define K8_NBCTL_CECCEn			BIT(0)

/* UnCorrectable ECC error reporting enable */
#define K8_NBCTL_UECCEn			BIT(1)

#define K8_NBCFG			0x44
#define K8_NBCFG_CHIPKILL		BIT(23)
#define K8_NBCFG_ECC_ENABLE		BIT(22)

#define K8_NBSL				0x48


/* Family F10h: Normalized Extended Error Codes */
#define F10_NBSL_EXT_ERR_RES		0x0
#define F10_NBSL_EXT_ERR_ECC		0x8

/* Next two are overloaded values */
#define F10_NBSL_EXT_ERR_LINK_PROTO	0xB
#define F10_NBSL_EXT_ERR_L3_PROTO	0xB

#define F10_NBSL_EXT_ERR_NB_ARRAY	0xC
#define F10_NBSL_EXT_ERR_DRAM_PARITY	0xD
#define F10_NBSL_EXT_ERR_LINK_RETRY	0xE

/* Next two are overloaded values */
#define F10_NBSL_EXT_ERR_GART_WALK	0xF
#define F10_NBSL_EXT_ERR_DEV_WALK	0xF

/* 0x10 to 0x1B: Reserved */
#define F10_NBSL_EXT_ERR_L3_DATA	0x1C
#define F10_NBSL_EXT_ERR_L3_TAG		0x1D
#define F10_NBSL_EXT_ERR_L3_LRU		0x1E

/* K8: Normalized Extended Error Codes */
#define K8_NBSL_EXT_ERR_ECC		0x0
#define K8_NBSL_EXT_ERR_CRC		0x1
#define K8_NBSL_EXT_ERR_SYNC		0x2
#define K8_NBSL_EXT_ERR_MST		0x3
#define K8_NBSL_EXT_ERR_TGT		0x4
#define K8_NBSL_EXT_ERR_GART		0x5
#define K8_NBSL_EXT_ERR_RMW		0x6
#define K8_NBSL_EXT_ERR_WDT		0x7
#define K8_NBSL_EXT_ERR_CHIPKILL_ECC	0x8
#define K8_NBSL_EXT_ERR_DRAM_PARITY	0xD

/*
 * The following are for BUS type errors AFTER values have been normalized by
 * shifting right
 */
#define K8_NBSL_PP_SRC			0x0
#define K8_NBSL_PP_RES			0x1
#define K8_NBSL_PP_OBS			0x2
#define K8_NBSL_PP_GENERIC		0x3

#define EXTRACT_ERR_CPU_MAP(x)		((x) & 0xF)

#define K8_NBEAL			0x50
#define K8_NBEAH			0x54
#define K8_SCRCTRL			0x58

#define F10_NB_CFG_LOW			0x88
#define	F10_NB_CFG_LOW_ENABLE_EXT_CFG	BIT(14)

#define F10_NB_CFG_HIGH			0x8C

#define F10_ONLINE_SPARE		0xB0
#define F10_ONLINE_SPARE_SWAPDONE0(x)	((x) & BIT(1))
#define F10_ONLINE_SPARE_SWAPDONE1(x)	((x) & BIT(3))
#define F10_ONLINE_SPARE_BADDRAM_CS0(x) (((x) >> 4) & 0x00000007)
#define F10_ONLINE_SPARE_BADDRAM_CS1(x) (((x) >> 8) & 0x00000007)

#define F10_NB_ARRAY_ADDR		0xB8

#define F10_NB_ARRAY_DRAM_ECC		0x80000000

/* Bits [2:1] are used to select 16-byte section within a 64-byte cacheline  */
#define SET_NB_ARRAY_ADDRESS(section)	(((section) & 0x3) << 1)

#define F10_NB_ARRAY_DATA		0xBC

#define SET_NB_DRAM_INJECTION_WRITE(word, bits)  \
					(BIT(((word) & 0xF) + 20) | \
					BIT(17) |  \
					((bits) & 0xF))

#define SET_NB_DRAM_INJECTION_READ(word, bits)  \
					(BIT(((word) & 0xF) + 20) | \
					BIT(16) |  \
					((bits) & 0xF))

#define K8_NBCAP			0xE8
#define K8_NBCAP_CORES			(BIT(12)|BIT(13))
#define K8_NBCAP_CHIPKILL		BIT(4)
#define K8_NBCAP_SECDED			BIT(3)
#define K8_NBCAP_8_NODE			BIT(2)
#define K8_NBCAP_DUAL_NODE		BIT(1)
#define K8_NBCAP_DCT_DUAL		BIT(0)

/*
 * MSR Regs
 */
#define K8_MSR_MCGCTL			0x017b
#define K8_MSR_MCGCTL_NBE		BIT(4)

#define K8_MSR_MC4CTL			0x0410
#define K8_MSR_MC4STAT			0x0411
#define K8_MSR_MC4ADDR			0x0412

/* AMD sets the first MC device at device ID 0x18. */
static inline int get_node_id(struct pci_dev *pdev)
{
	return PCI_SLOT(pdev->devfn) - 0x18;
}

enum amd64_chipset_families {
	K8_CPUS = 0,
	F10_CPUS,
	F11_CPUS,
};

/* Error injection control structure */
struct error_injection {
	u32	section;
	u32	word;
	u32	bit_map;
};

struct amd64_pvt {
	/* pci_device handles which we utilize */
	struct pci_dev *addr_f1_ctl;
	struct pci_dev *dram_f2_ctl;
	struct pci_dev *misc_f3_ctl;

	int mc_node_id;		/* MC index of this MC node */
	int ext_model;		/* extended model value of this node */

	struct low_ops *ops;	/* pointer to per PCI Device ID func table */

	int channel_count;

	/* Raw registers */
	u32 dclr0;		/* DRAM Configuration Low DCT0 reg */
	u32 dclr1;		/* DRAM Configuration Low DCT1 reg */
	u32 dchr0;		/* DRAM Configuration High DCT0 reg */
	u32 dchr1;		/* DRAM Configuration High DCT1 reg */
	u32 nbcap;		/* North Bridge Capabilities */
	u32 nbcfg;		/* F10 North Bridge Configuration */
	u32 ext_nbcfg;		/* Extended F10 North Bridge Configuration */
	u32 dhar;		/* DRAM Hoist reg */
	u32 dbam0;		/* DRAM Base Address Mapping reg for DCT0 */
	u32 dbam1;		/* DRAM Base Address Mapping reg for DCT1 */

	/* DRAM CS Base Address Registers F2x[1,0][5C:40] */
	u32 dcsb0[CHIPSELECT_COUNT];
	u32 dcsb1[CHIPSELECT_COUNT];

	/* DRAM CS Mask Registers F2x[1,0][6C:60] */
	u32 dcsm0[CHIPSELECT_COUNT];
	u32 dcsm1[CHIPSELECT_COUNT];

	/*
	 * Decoded parts of DRAM BASE and LIMIT Registers
	 * F1x[78,70,68,60,58,50,48,40]
	 */
	u64 dram_base[DRAM_REG_COUNT];
	u64 dram_limit[DRAM_REG_COUNT];
	u8  dram_IntlvSel[DRAM_REG_COUNT];
	u8  dram_IntlvEn[DRAM_REG_COUNT];
	u8  dram_DstNode[DRAM_REG_COUNT];
	u8  dram_rw_en[DRAM_REG_COUNT];

	/*
	 * The following fields are set at (load) run time, after CPU revision
	 * has been determined, since the dct_base and dct_mask registers vary
	 * based on revision
	 */
	u32 dcsb_base;		/* DCSB base bits */
	u32 dcsm_mask;		/* DCSM mask bits */
	u32 num_dcsm;		/* Number of DCSM registers */
	u32 dcs_mask_notused;	/* DCSM notused mask bits */
	u32 dcs_shift;		/* DCSB and DCSM shift value */

	u64 top_mem;		/* top of memory below 4GB */
	u64 top_mem2;		/* top of memory above 4GB */

	u32 dram_ctl_select_low;	/* DRAM Controller Select Low Reg */
	u32 dram_ctl_select_high;	/* DRAM Controller Select High Reg */
	u32 online_spare;               /* On-Line spare Reg */

	/* temp storage for when input is received from sysfs */
	struct err_regs ctl_error_info;

	/* place to store error injection parameters prior to issue */
	struct error_injection injection;

	/* Save old hw registers' values before we modified them */
	u32 nbctl_mcgctl_saved;		/* When true, following 2 are valid */
	u32 old_nbctl;
	unsigned long old_mcgctl;	/* per core on this node */

	/* MC Type Index value: socket F vs Family 10h */
	u32 mc_type_index;

	/* misc settings */
	struct flags {
		unsigned long cf8_extcfg:1;
	} flags;
};

struct scrubrate {
       u32 scrubval;           /* bit pattern for scrub rate */
       u32 bandwidth;          /* bandwidth consumed (bytes/sec) */
};

extern struct scrubrate scrubrates[23];
extern u32 revf_quad_ddr2_shift[16];
extern const char *tt_msgs[4];
extern const char *ll_msgs[4];
extern const char *rrrr_msgs[16];
extern const char *to_msgs[2];
extern const char *pp_msgs[4];
extern const char *ii_msgs[4];
extern const char *ext_msgs[32];
extern const char *htlink_msgs[8];

#ifdef CONFIG_EDAC_DEBUG
#define NUM_DBG_ATTRS 9
#else
#define NUM_DBG_ATTRS 0
#endif

#ifdef CONFIG_EDAC_AMD64_ERROR_INJECTION
#define NUM_INJ_ATTRS 5
#else
#define NUM_INJ_ATTRS 0
#endif

extern struct mcidev_sysfs_attribute amd64_dbg_attrs[NUM_DBG_ATTRS],
				     amd64_inj_attrs[NUM_INJ_ATTRS];

/*
 * Each of the PCI Device IDs types have their own set of hardware accessor
 * functions and per device encoding/decoding logic.
 */
struct low_ops {
	int (*probe_valid_hardware)(struct amd64_pvt *pvt);
	int (*early_channel_count)(struct amd64_pvt *pvt);

	u64 (*get_error_address)(struct mem_ctl_info *mci,
			struct err_regs *info);
	void (*read_dram_base_limit)(struct amd64_pvt *pvt, int dram);
	void (*read_dram_ctl_register)(struct amd64_pvt *pvt);
	void (*map_sysaddr_to_csrow)(struct mem_ctl_info *mci,
					struct err_regs *info,
					u64 SystemAddr);
	int (*dbam_map_to_pages)(struct amd64_pvt *pvt, int dram_map);
};

struct amd64_family_type {
	const char *ctl_name;
	u16 addr_f1_ctl;
	u16 misc_f3_ctl;
	struct low_ops ops;
};

static struct amd64_family_type amd64_family_types[];

static inline const char *get_amd_family_name(int index)
{
	return amd64_family_types[index].ctl_name;
}

static inline struct low_ops *family_ops(int index)
{
	return &amd64_family_types[index].ops;
}

/*
 * For future CPU versions, verify the following as new 'slow' rates appear and
 * modify the necessary skip values for the supported CPU.
 */
#define K8_MIN_SCRUB_RATE_BITS	0x0
#define F10_MIN_SCRUB_RATE_BITS	0x5
#define F11_MIN_SCRUB_RATE_BITS	0x6

int amd64_get_dram_hole_info(struct mem_ctl_info *mci, u64 *hole_base,
			     u64 *hole_offset, u64 *hole_size);