amd64_edac: add driver header

Borislav:
- remove register bit descriptions (complete text in BKDG)
- cleanup and remove excessive/superfluous comments

Reviewed-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Doug Thompson <dougthompson@xmission.com>
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>

1 files changed, 628 insertions, 0 deletions

diff --git a/drivers/edac/amd64_edac.h b/drivers/edac/amd64_edac.h
new file mode 100644
index 000000000000..6f5d5d62cefc
--- /dev/null
+++ b/drivers/edac/amd64_edac.h
@@ -0,0 +1,628 @@
+/*
+ * 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 "edac_core.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
+
+
+#define EXTRACT_HIGH_SYNDROME(x)	(((x) >> 24) & 0xff)
+#define EXTRACT_EXT_ERROR_CODE(x)	(((x) >> 16) & 0x1f)
+
+/* Family F10h: Normalized Extended Error Codes */
+#define F10_NBSL_EXT_ERR_RES		0x0
+#define F10_NBSL_EXT_ERR_CRC		0x1
+#define F10_NBSL_EXT_ERR_SYNC		0x2
+#define F10_NBSL_EXT_ERR_MST		0x3
+#define F10_NBSL_EXT_ERR_TGT		0x4
+#define F10_NBSL_EXT_ERR_GART		0x5
+#define F10_NBSL_EXT_ERR_RMW		0x6
+#define F10_NBSL_EXT_ERR_WDT		0x7
+#define F10_NBSL_EXT_ERR_ECC		0x8
+#define F10_NBSL_EXT_ERR_DEV		0x9
+#define F10_NBSL_EXT_ERR_LINK_DATA	0xA
+
+/* 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
+
+#define EXTRACT_ERROR_CODE(x)		((x) & 0xffff)
+#define	TEST_TLB_ERROR(x)		(((x) & 0xFFF0) == 0x0010)
+#define	TEST_MEM_ERROR(x)		(((x) & 0xFF00) == 0x0100)
+#define	TEST_BUS_ERROR(x)		(((x) & 0xF800) == 0x0800)
+#define	EXTRACT_TT_CODE(x)		(((x) >> 2) & 0x3)
+#define	EXTRACT_II_CODE(x)		(((x) >> 2) & 0x3)
+#define	EXTRACT_LL_CODE(x)		(((x) >> 0) & 0x3)
+#define	EXTRACT_RRRR_CODE(x)		(((x) >> 4) & 0xf)
+#define	EXTRACT_TO_CODE(x)		(((x) >> 8) & 0x1)
+#define	EXTRACT_PP_CODE(x)		(((x) >> 9) & 0x3)
+
+/*
+ * 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 K8_NBSH				0x4C
+
+#define K8_NBSH_VALID_BIT		BIT(31)
+#define K8_NBSH_OVERFLOW		BIT(30)
+#define K8_NBSH_UNCORRECTED_ERR		BIT(29)
+#define K8_NBSH_ERR_ENABLE		BIT(28)
+#define K8_NBSH_MISC_ERR_VALID		BIT(27)
+#define K8_NBSH_VALID_ERROR_ADDR	BIT(26)
+#define K8_NBSH_PCC			BIT(25)
+#define K8_NBSH_CECC			BIT(14)
+#define K8_NBSH_UECC			BIT(13)
+#define K8_NBSH_ERR_SCRUBER		BIT(8)
+#define K8_NBSH_CORE3			BIT(3)
+#define K8_NBSH_CORE2			BIT(2)
+#define K8_NBSH_CORE1			BIT(1)
+#define K8_NBSH_CORE0			BIT(0)
+
+#define EXTRACT_LDT_LINK(x)		(((x) >> 4) & 0x7)
+#define EXTRACT_ERR_CPU_MAP(x)		((x) & 0xF)
+#define EXTRACT_LOW_SYNDROME(x)		(((x) >> 15) & 0xff)
+
+
+#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_mc_node_id_from_pdev(struct pci_dev *pdev)
+{
+	return PCI_SLOT(pdev->devfn) - 0x18;
+}
+
+enum amd64_chipset_families {
+	K8_CPUS = 0,
+	F10_CPUS,
+	F11_CPUS,
+};
+
+/*
+ * Structure to hold:
+ *
+ * 1) dynamically read status and error address HW registers
+ * 2) sysfs entered values
+ * 3) MCE values
+ *
+ * Depends on entry into the modules
+ */
+struct amd64_error_info_regs {
+	u32 nbcfg;
+	u32 nbsh;
+	u32 nbsl;
+	u32 nbeah;
+	u32 nbeal;
+};
+
+/* 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 amd64_error_info_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;
+	u32 *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];
+
+/*
+ * 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 amd64_error_info_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 amd64_error_info_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_process_error_info(struct mem_ctl_info *mci,
+			     struct amd64_error_info_regs *info,
+			     int handle_errors);
+int amd64_get_dram_hole_info(struct mem_ctl_info *mci, u64 *hole_base,
+			     u64 *hole_offset, u64 *hole_size);