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diff --git a/arch/sparc/include/asm/ecc.h b/arch/sparc/include/asm/ecc.h
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+++ b/arch/sparc/include/asm/ecc.h
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+/*
+ * ecc.h: Definitions and defines for the external cache/memory
+ * controller on the sun4m.
+ *
+ * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ */
+
+#ifndef _SPARC_ECC_H
+#define _SPARC_ECC_H
+
+/* These registers are accessed through the SRMMU passthrough ASI 0x20 */
+#define ECC_ENABLE 0x00000000 /* ECC enable register */
+#define ECC_FSTATUS 0x00000008 /* ECC fault status register */
+#define ECC_FADDR 0x00000010 /* ECC fault address register */
+#define ECC_DIGNOSTIC 0x00000018 /* ECC diagnostics register */
+#define ECC_MBAENAB 0x00000020 /* MBus arbiter enable register */
+#define ECC_DMESG 0x00001000 /* Diagnostic message passing area */
+
+/* ECC MBus Arbiter Enable register:
+ *
+ * ----------------------------------------
+ * | |SBUS|MOD3|MOD2|MOD1|RSV|
+ * ----------------------------------------
+ * 31 5 4 3 2 1 0
+ *
+ * SBUS: Enable MBus Arbiter on the SBus 0=off 1=on
+ * MOD3: Enable MBus Arbiter on MBus module 3 0=off 1=on
+ * MOD2: Enable MBus Arbiter on MBus module 2 0=off 1=on
+ * MOD1: Enable MBus Arbiter on MBus module 1 0=off 1=on
+ */
+
+#define ECC_MBAE_SBUS 0x00000010
+#define ECC_MBAE_MOD3 0x00000008
+#define ECC_MBAE_MOD2 0x00000004
+#define ECC_MBAE_MOD1 0x00000002
+
+/* ECC Fault Control Register layout:
+ *
+ * -----------------------------
+ * | RESV | ECHECK | EINT |
+ * -----------------------------
+ * 31 2 1 0
+ *
+ * ECHECK: Enable ECC checking. 0=off 1=on
+ * EINT: Enable Interrupts for correctable errors. 0=off 1=on
+ */
+#define ECC_FCR_CHECK 0x00000002
+#define ECC_FCR_INTENAB 0x00000001
+
+/* ECC Fault Address Register Zero layout:
+ *
+ * -----------------------------------------------------
+ * | MID | S | RSV | VA | BM |AT| C| SZ |TYP| PADDR |
+ * -----------------------------------------------------
+ * 31-28 27 26-22 21-14 13 12 11 10-8 7-4 3-0
+ *
+ * MID: ModuleID of the faulting processor. ie. who did it?
+ * S: Supervisor/Privileged access? 0=no 1=yes
+ * VA: Bits 19-12 of the virtual faulting address, these are the
+ * superset bits in the virtual cache and can be used for
+ * a flush operation if necessary.
+ * BM: Boot mode? 0=no 1=yes This is just like the SRMMU boot
+ * mode bit.
+ * AT: Did this fault happen during an atomic instruction? 0=no
+ * 1=yes. This means either an 'ldstub' or 'swap' instruction
+ * was in progress (but not finished) when this fault happened.
+ * This indicated whether the bus was locked when the fault
+ * occurred.
+ * C: Did the pte for this access indicate that it was cacheable?
+ * 0=no 1=yes
+ * SZ: The size of the transaction.
+ * TYP: The transaction type.
+ * PADDR: Bits 35-32 of the physical address for the fault.
+ */
+#define ECC_FADDR0_MIDMASK 0xf0000000
+#define ECC_FADDR0_S 0x08000000
+#define ECC_FADDR0_VADDR 0x003fc000
+#define ECC_FADDR0_BMODE 0x00002000
+#define ECC_FADDR0_ATOMIC 0x00001000
+#define ECC_FADDR0_CACHE 0x00000800
+#define ECC_FADDR0_SIZE 0x00000700
+#define ECC_FADDR0_TYPE 0x000000f0
+#define ECC_FADDR0_PADDR 0x0000000f
+
+/* ECC Fault Address Register One layout:
+ *
+ * -------------------------------------
+ * | Physical Address 31-0 |
+ * -------------------------------------
+ * 31 0
+ *
+ * You get the upper 4 bits of the physical address from the
+ * PADDR field in ECC Fault Address Zero register.
+ */
+
+/* ECC Fault Status Register layout:
+ *
+ * ----------------------------------------------
+ * | RESV|C2E|MULT|SYNDROME|DWORD|UNC|TIMEO|BS|C|
+ * ----------------------------------------------
+ * 31-18 17 16 15-8 7-4 3 2 1 0
+ *
+ * C2E: A C2 graphics error occurred. 0=no 1=yes (SS10 only)
+ * MULT: Multiple errors occurred ;-O 0=no 1=prom_panic(yes)
+ * SYNDROME: Controller is mentally unstable.
+ * DWORD:
+ * UNC: Uncorrectable error. 0=no 1=yes
+ * TIMEO: Timeout occurred. 0=no 1=yes
+ * BS: C2 graphics bad slot access. 0=no 1=yes (SS10 only)
+ * C: Correctable error? 0=no 1=yes
+ */
+
+#define ECC_FSR_C2ERR 0x00020000
+#define ECC_FSR_MULT 0x00010000
+#define ECC_FSR_SYND 0x0000ff00
+#define ECC_FSR_DWORD 0x000000f0
+#define ECC_FSR_UNC 0x00000008
+#define ECC_FSR_TIMEO 0x00000004
+#define ECC_FSR_BADSLOT 0x00000002
+#define ECC_FSR_C 0x00000001
+
+#endif /* !(_SPARC_ECC_H) */