drivers/edac/amd64_edac.h

   1 /*
   2  * AMD64 class Memory Controller kernel module
   3  *
   4  * Copyright (c) 2009 SoftwareBitMaker.
   5  * Copyright (c) 2009 Advanced Micro Devices, Inc.
   6  *
   7  * This file may be distributed under the terms of the
   8  * GNU General Public License.
   9  *
  10  *      Originally Written by Thayne Harbaugh
  11  *
  12  *      Changes by Douglas "norsk" Thompson  <dougthompson@xmission.com>:
  13  *              - K8 CPU Revision D and greater support
  14  *
  15  *      Changes by Dave Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>:
  16  *              - Module largely rewritten, with new (and hopefully correct)
  17  *              code for dealing with node and chip select interleaving,
  18  *              various code cleanup, and bug fixes
  19  *              - Added support for memory hoisting using DRAM hole address
  20  *              register
  21  *
  22  *      Changes by Douglas "norsk" Thompson <dougthompson@xmission.com>:
  23  *              -K8 Rev (1207) revision support added, required Revision
  24  *              specific mini-driver code to support Rev F as well as
  25  *              prior revisions
  26  *
  27  *      Changes by Douglas "norsk" Thompson <dougthompson@xmission.com>:
  28  *              -Family 10h revision support added. New PCI Device IDs,
  29  *              indicating new changes. Actual registers modified
  30  *              were slight, less than the Rev E to Rev F transition
  31  *              but changing the PCI Device ID was the proper thing to
  32  *              do, as it provides for almost automactic family
  33  *              detection. The mods to Rev F required more family
  34  *              information detection.
  35  *
  36  *      Changes/Fixes by Borislav Petkov <borislav.petkov@amd.com>:
  37  *              - misc fixes and code cleanups
  38  *
  39  * This module is based on the following documents
  40  * (available from http://www.amd.com/):
  41  *
  42  *      Title:  BIOS and Kernel Developer's Guide for AMD Athlon 64 and AMD
  43  *              Opteron Processors
  44  *      AMD publication #: 26094
  45  *`     Revision: 3.26
  46  *
  47  *      Title:  BIOS and Kernel Developer's Guide for AMD NPT Family 0Fh
  48  *              Processors
  49  *      AMD publication #: 32559
  50  *      Revision: 3.00
  51  *      Issue Date: May 2006
  52  *
  53  *      Title:  BIOS and Kernel Developer's Guide (BKDG) For AMD Family 10h
  54  *              Processors
  55  *      AMD publication #: 31116
  56  *      Revision: 3.00
  57  *      Issue Date: September 07, 2007
  58  *
  59  * Sections in the first 2 documents are no longer in sync with each other.
  60  * The Family 10h BKDG was totally re-written from scratch with a new
  61  * presentation model.
  62  * Therefore, comments that refer to a Document section might be off.
  63  */
  64
  65 #include <linux/module.h>
  66 #include <linux/ctype.h>
  67 #include <linux/init.h>
  68 #include <linux/pci.h>
  69 #include <linux/pci_ids.h>
  70 #include <linux/slab.h>
  71 #include <linux/mmzone.h>
  72 #include <linux/edac.h>
  73 #include <asm/msr.h>
  74 #include "edac_core.h"
  75 #include "edac_mce_amd.h"
  76
  77 #define amd64_printk(level, fmt, arg...) \
  78         edac_printk(level, "amd64", fmt, ##arg)
  79
  80 #define amd64_mc_printk(mci, level, fmt, arg...) \
  81         edac_mc_chipset_printk(mci, level, "amd64", fmt, ##arg)
  82
  83 /*
  84  * Throughout the comments in this code, the following terms are used:
  85  *
  86  *      SysAddr, DramAddr, and InputAddr
  87  *
  88  *  These terms come directly from the amd64 documentation
  89  * (AMD publication #26094).  They are defined as follows:
  90  *
  91  *     SysAddr:
  92  *         This is a physical address generated by a CPU core or a device
  93  *         doing DMA.  If generated by a CPU core, a SysAddr is the result of
  94  *         a virtual to physical address translation by the CPU core's address
  95  *         translation mechanism (MMU).
  96  *
  97  *     DramAddr:
  98  *         A DramAddr is derived from a SysAddr by subtracting an offset that
  99  *         depends on which node the SysAddr maps to and whether the SysAddr
 100  *         is within a range affected by memory hoisting.  The DRAM Base
 101  *         (section 3.4.4.1) and DRAM Limit (section 3.4.4.2) registers
 102  *         determine which node a SysAddr maps to.
 103  *
 104  *         If the DRAM Hole Address Register (DHAR) is enabled and the SysAddr
 105  *         is within the range of addresses specified by this register, then
 106  *         a value x from the DHAR is subtracted from the SysAddr to produce a
 107  *         DramAddr.  Here, x represents the base address for the node that
 108  *         the SysAddr maps to plus an offset due to memory hoisting.  See
 109  *         section 3.4.8 and the comments in amd64_get_dram_hole_info() and
 110  *         sys_addr_to_dram_addr() below for more information.
 111  *
 112  *         If the SysAddr is not affected by the DHAR then a value y is
 113  *         subtracted from the SysAddr to produce a DramAddr.  Here, y is the
 114  *         base address for the node that the SysAddr maps to.  See section
 115  *         3.4.4 and the comments in sys_addr_to_dram_addr() below for more
 116  *         information.
 117  *
 118  *     InputAddr:
 119  *         A DramAddr is translated to an InputAddr before being passed to the
 120  *         memory controller for the node that the DramAddr is associated
 121  *         with.  The memory controller then maps the InputAddr to a csrow.
 122  *         If node interleaving is not in use, then the InputAddr has the same
 123  *         value as the DramAddr.  Otherwise, the InputAddr is produced by
 124  *         discarding the bits used for node interleaving from the DramAddr.
 125  *         See section 3.4.4 for more information.
 126  *
 127  *         The memory controller for a given node uses its DRAM CS Base and
 128  *         DRAM CS Mask registers to map an InputAddr to a csrow.  See
 129  *         sections 3.5.4 and 3.5.5 for more information.
 130  */
 131
 132 #define EDAC_AMD64_VERSION              " Ver: 3.2.0 " __DATE__
 133 #define EDAC_MOD_STR                    "amd64_edac"
 134
 135 #define EDAC_MAX_NUMNODES               8
 136
 137 /* Extended Model from CPUID, for CPU Revision numbers */
 138 #define OPTERON_CPU_LE_REV_C            0
 139 #define OPTERON_CPU_REV_D               1
 140 #define OPTERON_CPU_REV_E               2
 141
 142 /* NPT processors have the following Extended Models */
 143 #define OPTERON_CPU_REV_F               4
 144 #define OPTERON_CPU_REV_FA              5
 145
 146 /* Hardware limit on ChipSelect rows per MC and processors per system */
 147 #define MAX_CS_COUNT                    8
 148 #define DRAM_REG_COUNT                  8
 149
 150
 151 /*
 152  * PCI-defined configuration space registers
 153  */
 154
 155
 156 /*
 157  * Function 1 - Address Map
 158  */
 159 #define K8_DRAM_BASE_LOW                0x40
 160 #define K8_DRAM_LIMIT_LOW               0x44
 161 #define K8_DHAR                         0xf0
 162
 163 #define DHAR_VALID                      BIT(0)
 164 #define F10_DRAM_MEM_HOIST_VALID        BIT(1)
 165
 166 #define DHAR_BASE_MASK                  0xff000000
 167 #define dhar_base(dhar)                 (dhar & DHAR_BASE_MASK)
 168
 169 #define K8_DHAR_OFFSET_MASK             0x0000ff00
 170 #define k8_dhar_offset(dhar)            ((dhar & K8_DHAR_OFFSET_MASK) << 16)
 171
 172 #define F10_DHAR_OFFSET_MASK            0x0000ff80
 173                                         /* NOTE: Extra mask bit vs K8 */
 174 #define f10_dhar_offset(dhar)           ((dhar & F10_DHAR_OFFSET_MASK) << 16)
 175
 176
 177 /* F10 High BASE/LIMIT registers */
 178 #define F10_DRAM_BASE_HIGH              0x140
 179 #define F10_DRAM_LIMIT_HIGH             0x144
 180
 181
 182 /*
 183  * Function 2 - DRAM controller
 184  */
 185 #define K8_DCSB0                        0x40
 186 #define F10_DCSB1                       0x140
 187
 188 #define K8_DCSB_CS_ENABLE               BIT(0)
 189 #define K8_DCSB_NPT_SPARE               BIT(1)
 190 #define K8_DCSB_NPT_TESTFAIL            BIT(2)
 191
 192 /*
 193  * REV E: select [31:21] and [15:9] from DCSB and the shift amount to form
 194  * the address
 195  */
 196 #define REV_E_DCSB_BASE_BITS            (0xFFE0FE00ULL)
 197 #define REV_E_DCS_SHIFT                 4
 198
 199 #define REV_F_F1Xh_DCSB_BASE_BITS       (0x1FF83FE0ULL)
 200 #define REV_F_F1Xh_DCS_SHIFT            8
 201
 202 /*
 203  * REV F and later: selects [28:19] and [13:5] from DCSB and the shift amount
 204  * to form the address
 205  */
 206 #define REV_F_DCSB_BASE_BITS            (0x1FF83FE0ULL)
 207 #define REV_F_DCS_SHIFT                 8
 208
 209 /* DRAM CS Mask Registers */
 210 #define K8_DCSM0                        0x60
 211 #define F10_DCSM1                       0x160
 212
 213 /* REV E: select [29:21] and [15:9] from DCSM */
 214 #define REV_E_DCSM_MASK_BITS            0x3FE0FE00
 215
 216 /* unused bits [24:20] and [12:0] */
 217 #define REV_E_DCS_NOTUSED_BITS          0x01F01FFF
 218
 219 /* REV F and later: select [28:19] and [13:5] from DCSM */
 220 #define REV_F_F1Xh_DCSM_MASK_BITS       0x1FF83FE0
 221
 222 /* unused bits [26:22] and [12:0] */
 223 #define REV_F_F1Xh_DCS_NOTUSED_BITS     0x07C01FFF
 224
 225 #define DBAM0                           0x80
 226 #define DBAM1                           0x180
 227
 228 /* Extract the DIMM 'type' on the i'th DIMM from the DBAM reg value passed */
 229 #define DBAM_DIMM(i, reg)               ((((reg) >> (4*i))) & 0xF)
 230
 231 #define DBAM_MAX_VALUE                  11
 232
 233
 234 #define F10_DCLR_0                      0x90
 235 #define F10_DCLR_1                      0x190
 236 #define REVE_WIDTH_128                  BIT(16)
 237 #define F10_WIDTH_128                   BIT(11)
 238
 239
 240 #define F10_DCHR_0                      0x94
 241 #define F10_DCHR_1                      0x194
 242
 243 #define F10_DCHR_FOUR_RANK_DIMM         BIT(18)
 244 #define F10_DCHR_Ddr3Mode               BIT(8)
 245 #define F10_DCHR_MblMode                BIT(6)
 246
 247
 248 #define F10_DCTL_SEL_LOW                0x110
 249
 250 #define dct_sel_baseaddr(pvt)    \
 251         ((pvt->dram_ctl_select_low) & 0xFFFFF800)
 252
 253 #define dct_sel_interleave_addr(pvt)    \
 254         (((pvt->dram_ctl_select_low) >> 6) & 0x3)
 255
 256 enum {
 257         F10_DCTL_SEL_LOW_DctSelHiRngEn  = BIT(0),
 258         F10_DCTL_SEL_LOW_DctSelIntLvEn  = BIT(2),
 259         F10_DCTL_SEL_LOW_DctGangEn      = BIT(4),
 260         F10_DCTL_SEL_LOW_DctDatIntLv    = BIT(5),
 261         F10_DCTL_SEL_LOW_DramEnable     = BIT(8),
 262         F10_DCTL_SEL_LOW_MemCleared     = BIT(10),
 263 };
 264
 265 #define    dct_high_range_enabled(pvt)    \
 266         (pvt->dram_ctl_select_low & F10_DCTL_SEL_LOW_DctSelHiRngEn)
 267
 268 #define dct_interleave_enabled(pvt)        \
 269         (pvt->dram_ctl_select_low & F10_DCTL_SEL_LOW_DctSelIntLvEn)
 270
 271 #define dct_ganging_enabled(pvt)        \
 272         (pvt->dram_ctl_select_low & F10_DCTL_SEL_LOW_DctGangEn)
 273
 274 #define dct_data_intlv_enabled(pvt)    \
 275         (pvt->dram_ctl_select_low & F10_DCTL_SEL_LOW_DctDatIntLv)
 276
 277 #define dct_dram_enabled(pvt)    \
 278         (pvt->dram_ctl_select_low & F10_DCTL_SEL_LOW_DramEnable)
 279
 280 #define dct_memory_cleared(pvt)    \
 281         (pvt->dram_ctl_select_low & F10_DCTL_SEL_LOW_MemCleared)
 282
 283
 284 #define F10_DCTL_SEL_HIGH               0x114
 285
 286
 287 /*
 288  * Function 3 - Misc Control
 289  */
 290 #define K8_NBCTL                        0x40
 291
 292 /* Correctable ECC error reporting enable */
 293 #define K8_NBCTL_CECCEn                 BIT(0)
 294
 295 /* UnCorrectable ECC error reporting enable */
 296 #define K8_NBCTL_UECCEn                 BIT(1)
 297
 298 #define K8_NBCFG                        0x44
 299 #define K8_NBCFG_CHIPKILL               BIT(23)
 300 #define K8_NBCFG_ECC_ENABLE             BIT(22)
 301
 302 #define K8_NBSL                         0x48
 303
 304
 305 /* Family F10h: Normalized Extended Error Codes */
 306 #define F10_NBSL_EXT_ERR_RES            0x0
 307 #define F10_NBSL_EXT_ERR_ECC            0x8
 308
 309 /* Next two are overloaded values */
 310 #define F10_NBSL_EXT_ERR_LINK_PROTO     0xB
 311 #define F10_NBSL_EXT_ERR_L3_PROTO       0xB
 312
 313 #define F10_NBSL_EXT_ERR_NB_ARRAY       0xC
 314 #define F10_NBSL_EXT_ERR_DRAM_PARITY    0xD
 315 #define F10_NBSL_EXT_ERR_LINK_RETRY     0xE
 316
 317 /* Next two are overloaded values */
 318 #define F10_NBSL_EXT_ERR_GART_WALK      0xF
 319 #define F10_NBSL_EXT_ERR_DEV_WALK       0xF
 320
 321 /* 0x10 to 0x1B: Reserved */
 322 #define F10_NBSL_EXT_ERR_L3_DATA        0x1C
 323 #define F10_NBSL_EXT_ERR_L3_TAG         0x1D
 324 #define F10_NBSL_EXT_ERR_L3_LRU         0x1E
 325
 326 /* K8: Normalized Extended Error Codes */
 327 #define K8_NBSL_EXT_ERR_ECC             0x0
 328 #define K8_NBSL_EXT_ERR_CRC             0x1
 329 #define K8_NBSL_EXT_ERR_SYNC            0x2
 330 #define K8_NBSL_EXT_ERR_MST             0x3
 331 #define K8_NBSL_EXT_ERR_TGT             0x4
 332 #define K8_NBSL_EXT_ERR_GART            0x5
 333 #define K8_NBSL_EXT_ERR_RMW             0x6
 334 #define K8_NBSL_EXT_ERR_WDT             0x7
 335 #define K8_NBSL_EXT_ERR_CHIPKILL_ECC    0x8
 336 #define K8_NBSL_EXT_ERR_DRAM_PARITY     0xD
 337
 338 /*
 339  * The following are for BUS type errors AFTER values have been normalized by
 340  * shifting right
 341  */
 342 #define K8_NBSL_PP_SRC                  0x0
 343 #define K8_NBSL_PP_RES                  0x1
 344 #define K8_NBSL_PP_OBS                  0x2
 345 #define K8_NBSL_PP_GENERIC              0x3
 346
 347 #define EXTRACT_ERR_CPU_MAP(x)          ((x) & 0xF)
 348
 349 #define K8_NBEAL                        0x50
 350 #define K8_NBEAH                        0x54
 351 #define K8_SCRCTRL                      0x58
 352
 353 #define F10_NB_CFG_LOW                  0x88
 354 #define F10_NB_CFG_LOW_ENABLE_EXT_CFG   BIT(14)
 355
 356 #define F10_NB_CFG_HIGH                 0x8C
 357
 358 #define F10_ONLINE_SPARE                0xB0
 359 #define F10_ONLINE_SPARE_SWAPDONE0(x)   ((x) & BIT(1))
 360 #define F10_ONLINE_SPARE_SWAPDONE1(x)   ((x) & BIT(3))
 361 #define F10_ONLINE_SPARE_BADDRAM_CS0(x) (((x) >> 4) & 0x00000007)
 362 #define F10_ONLINE_SPARE_BADDRAM_CS1(x) (((x) >> 8) & 0x00000007)
 363
 364 #define F10_NB_ARRAY_ADDR               0xB8
 365
 366 #define F10_NB_ARRAY_DRAM_ECC           0x80000000
 367
 368 /* Bits [2:1] are used to select 16-byte section within a 64-byte cacheline  */
 369 #define SET_NB_ARRAY_ADDRESS(section)   (((section) & 0x3) << 1)
 370
 371 #define F10_NB_ARRAY_DATA               0xBC
 372
 373 #define SET_NB_DRAM_INJECTION_WRITE(word, bits)  \
 374                                         (BIT(((word) & 0xF) + 20) | \
 375                                         BIT(17) | bits)
 376
 377 #define SET_NB_DRAM_INJECTION_READ(word, bits)  \
 378                                         (BIT(((word) & 0xF) + 20) | \
 379                                         BIT(16) |  bits)
 380
 381 #define K8_NBCAP                        0xE8
 382 #define K8_NBCAP_CORES                  (BIT(12)|BIT(13))
 383 #define K8_NBCAP_CHIPKILL               BIT(4)
 384 #define K8_NBCAP_SECDED                 BIT(3)
 385 #define K8_NBCAP_8_NODE                 BIT(2)
 386 #define K8_NBCAP_DUAL_NODE              BIT(1)
 387 #define K8_NBCAP_DCT_DUAL               BIT(0)
 388
 389 /*
 390  * MSR Regs
 391  */
 392 #define K8_MSR_MCGCTL                   0x017b
 393 #define K8_MSR_MCGCTL_NBE               BIT(4)
 394
 395 #define K8_MSR_MC4CTL                   0x0410
 396 #define K8_MSR_MC4STAT                  0x0411
 397 #define K8_MSR_MC4ADDR                  0x0412
 398
 399 /* AMD sets the first MC device at device ID 0x18. */
 400 static inline int get_node_id(struct pci_dev *pdev)
 401 {
 402         return PCI_SLOT(pdev->devfn) - 0x18;
 403 }
 404
 405 enum amd64_chipset_families {
 406         K8_CPUS = 0,
 407         F10_CPUS,
 408         F11_CPUS,
 409 };
 410
 411 /* Error injection control structure */
 412 struct error_injection {
 413         u32     section;
 414         u32     word;
 415         u32     bit_map;
 416 };
 417
 418 struct amd64_pvt {
 419         /* pci_device handles which we utilize */
 420         struct pci_dev *addr_f1_ctl;
 421         struct pci_dev *dram_f2_ctl;
 422         struct pci_dev *misc_f3_ctl;
 423
 424         int mc_node_id;         /* MC index of this MC node */
 425         int ext_model;          /* extended model value of this node */
 426
 427         struct low_ops *ops;    /* pointer to per PCI Device ID func table */
 428
 429         int channel_count;
 430
 431         /* Raw registers */
 432         u32 dclr0;              /* DRAM Configuration Low DCT0 reg */
 433         u32 dclr1;              /* DRAM Configuration Low DCT1 reg */
 434         u32 dchr0;              /* DRAM Configuration High DCT0 reg */
 435         u32 dchr1;              /* DRAM Configuration High DCT1 reg */
 436         u32 nbcap;              /* North Bridge Capabilities */
 437         u32 nbcfg;              /* F10 North Bridge Configuration */
 438         u32 ext_nbcfg;          /* Extended F10 North Bridge Configuration */
 439         u32 dhar;               /* DRAM Hoist reg */
 440         u32 dbam0;              /* DRAM Base Address Mapping reg for DCT0 */
 441         u32 dbam1;              /* DRAM Base Address Mapping reg for DCT1 */
 442
 443         /* DRAM CS Base Address Registers F2x[1,0][5C:40] */
 444         u32 dcsb0[MAX_CS_COUNT];
 445         u32 dcsb1[MAX_CS_COUNT];
 446
 447         /* DRAM CS Mask Registers F2x[1,0][6C:60] */
 448         u32 dcsm0[MAX_CS_COUNT];
 449         u32 dcsm1[MAX_CS_COUNT];
 450
 451         /*
 452          * Decoded parts of DRAM BASE and LIMIT Registers
 453          * F1x[78,70,68,60,58,50,48,40]
 454          */
 455         u64 dram_base[DRAM_REG_COUNT];
 456         u64 dram_limit[DRAM_REG_COUNT];
 457         u8  dram_IntlvSel[DRAM_REG_COUNT];
 458         u8  dram_IntlvEn[DRAM_REG_COUNT];
 459         u8  dram_DstNode[DRAM_REG_COUNT];
 460         u8  dram_rw_en[DRAM_REG_COUNT];
 461
 462         /*
 463          * The following fields are set at (load) run time, after CPU revision
 464          * has been determined, since the dct_base and dct_mask registers vary
 465          * based on revision
 466          */
 467         u32 dcsb_base;          /* DCSB base bits */
 468         u32 dcsm_mask;          /* DCSM mask bits */
 469         u32 cs_count;           /* num chip selects (== num DCSB registers) */
 470         u32 num_dcsm;           /* Number of DCSM registers */
 471         u32 dcs_mask_notused;   /* DCSM notused mask bits */
 472         u32 dcs_shift;          /* DCSB and DCSM shift value */
 473
 474         u64 top_mem;            /* top of memory below 4GB */
 475         u64 top_mem2;           /* top of memory above 4GB */
 476
 477         u32 dram_ctl_select_low;        /* DRAM Controller Select Low Reg */
 478         u32 dram_ctl_select_high;       /* DRAM Controller Select High Reg */
 479         u32 online_spare;               /* On-Line spare Reg */
 480
 481         /* temp storage for when input is received from sysfs */
 482         struct err_regs ctl_error_info;
 483
 484         /* place to store error injection parameters prior to issue */
 485         struct error_injection injection;
 486
 487         /* Save old hw registers' values before we modified them */
 488         u32 nbctl_mcgctl_saved;         /* When true, following 2 are valid */
 489         u32 old_nbctl;
 490         unsigned long old_mcgctl;       /* per core on this node */
 491
 492         /* MC Type Index value: socket F vs Family 10h */
 493         u32 mc_type_index;
 494
 495         /* misc settings */
 496         struct flags {
 497                 unsigned long cf8_extcfg:1;
 498         } flags;
 499 };
 500
 501 struct scrubrate {
 502        u32 scrubval;           /* bit pattern for scrub rate */
 503        u32 bandwidth;          /* bandwidth consumed (bytes/sec) */
 504 };
 505
 506 extern struct scrubrate scrubrates[23];
 507 extern u32 revf_quad_ddr2_shift[16];
 508 extern const char *tt_msgs[4];
 509 extern const char *ll_msgs[4];
 510 extern const char *rrrr_msgs[16];
 511 extern const char *to_msgs[2];
 512 extern const char *pp_msgs[4];
 513 extern const char *ii_msgs[4];
 514 extern const char *ext_msgs[32];
 515 extern const char *htlink_msgs[8];
 516
 517 #ifdef CONFIG_EDAC_DEBUG
 518 #define NUM_DBG_ATTRS 9
 519 #else
 520 #define NUM_DBG_ATTRS 0
 521 #endif
 522
 523 #ifdef CONFIG_EDAC_AMD64_ERROR_INJECTION
 524 #define NUM_INJ_ATTRS 5
 525 #else
 526 #define NUM_INJ_ATTRS 0
 527 #endif
 528
 529 extern struct mcidev_sysfs_attribute amd64_dbg_attrs[NUM_DBG_ATTRS],
 530                                      amd64_inj_attrs[NUM_INJ_ATTRS];
 531
 532 /*
 533  * Each of the PCI Device IDs types have their own set of hardware accessor
 534  * functions and per device encoding/decoding logic.
 535  */
 536 struct low_ops {
 537         int (*probe_valid_hardware)(struct amd64_pvt *pvt);
 538         int (*early_channel_count)(struct amd64_pvt *pvt);
 539
 540         u64 (*get_error_address)(struct mem_ctl_info *mci,
 541                         struct err_regs *info);
 542         void (*read_dram_base_limit)(struct amd64_pvt *pvt, int dram);
 543         void (*read_dram_ctl_register)(struct amd64_pvt *pvt);
 544         void (*map_sysaddr_to_csrow)(struct mem_ctl_info *mci,
 545                                         struct err_regs *info,
 546                                         u64 SystemAddr);
 547         int (*dbam_map_to_pages)(struct amd64_pvt *pvt, int dram_map);
 548 };
 549
 550 struct amd64_family_type {
 551         const char *ctl_name;
 552         u16 addr_f1_ctl;
 553         u16 misc_f3_ctl;
 554         struct low_ops ops;
 555 };
 556
 557 static struct amd64_family_type amd64_family_types[];
 558
 559 static inline const char *get_amd_family_name(int index)
 560 {
 561         return amd64_family_types[index].ctl_name;
 562 }
 563
 564 static inline struct low_ops *family_ops(int index)
 565 {
 566         return &amd64_family_types[index].ops;
 567 }
 568
 569 /*
 570  * For future CPU versions, verify the following as new 'slow' rates appear and
 571  * modify the necessary skip values for the supported CPU.
 572  */
 573 #define K8_MIN_SCRUB_RATE_BITS  0x0
 574 #define F10_MIN_SCRUB_RATE_BITS 0x5
 575 #define F11_MIN_SCRUB_RATE_BITS 0x6
 576
 577 int amd64_get_dram_hole_info(struct mem_ctl_info *mci, u64 *hole_base,
 578                              u64 *hole_offset, u64 *hole_size);