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diff --git a/include/asm-mips/sn/nmi.h b/include/asm-mips/sn/nmi.h
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+/*
+ * 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) 1992 - 1997 Silicon Graphics, Inc.
+ */
+#ifndef __ASM_SN_NMI_H
+#define __ASM_SN_NMI_H
+
+#ident "$Revision: 1.5 $"
+
+#include <asm/sn/addrs.h>
+
+/*
+ * The launch data structure resides at a fixed place in each node's memory
+ * and is used to communicate between the master processor and the slave
+ * processors.
+ *
+ * The master stores launch parameters in the launch structure
+ * corresponding to a target processor that is in a slave loop, then sends
+ * an interrupt to the slave processor. The slave calls the desired
+ * function, followed by an optional rendezvous function, then returns to
+ * the slave loop. The master does not wait for the slaves before
+ * returning.
+ *
+ * There is an array of launch structures, one per CPU on the node. One
+ * interrupt level is used per CPU.
+ */
+
+#define NMI_MAGIC 0x48414d4d455201
+#define NMI_SIZEOF 0x40
+
+#define NMI_OFF_MAGIC 0x00 /* Struct offsets for assembly */
+#define NMI_OFF_FLAGS 0x08
+#define NMI_OFF_CALL 0x10
+#define NMI_OFF_CALLC 0x18
+#define NMI_OFF_CALLPARM 0x20
+#define NMI_OFF_GMASTER 0x28
+
+/*
+ * The NMI routine is called only if the complement address is
+ * correct.
+ *
+ * Before control is transferred to a routine, the complement address
+ * is zeroed (invalidated) to prevent an accidental call from a spurious
+ * interrupt.
+ *
+ */
+
+#ifndef __ASSEMBLY__
+
+typedef struct nmi_s {
+ volatile unsigned long magic; /* Magic number */
+ volatile unsigned long flags; /* Combination of flags above */
+ volatile void *call_addr; /* Routine for slave to call */
+ volatile void *call_addr_c; /* 1's complement of address */
+ volatile void *call_parm; /* Single parm passed to call */
+ volatile unsigned long gmaster; /* Flag true only on global master*/
+} nmi_t;
+
+#endif /* !__ASSEMBLY__ */
+
+/* Following definitions are needed both in the prom & the kernel
+ * to identify the format of the nmi cpu register save area in the
+ * low memory on each node.
+ */
+#ifndef __ASSEMBLY__
+
+struct reg_struct {
+ unsigned long gpr[32];
+ unsigned long sr;
+ unsigned long cause;
+ unsigned long epc;
+ unsigned long badva;
+ unsigned long error_epc;
+ unsigned long cache_err;
+ unsigned long nmi_sr;
+};
+
+#endif /* !__ASSEMBLY__ */
+
+/* These are the assembly language offsets into the reg_struct structure */
+
+#define R0_OFF 0x0
+#define R1_OFF 0x8
+#define R2_OFF 0x10
+#define R3_OFF 0x18
+#define R4_OFF 0x20
+#define R5_OFF 0x28
+#define R6_OFF 0x30
+#define R7_OFF 0x38
+#define R8_OFF 0x40
+#define R9_OFF 0x48
+#define R10_OFF 0x50
+#define R11_OFF 0x58
+#define R12_OFF 0x60
+#define R13_OFF 0x68
+#define R14_OFF 0x70
+#define R15_OFF 0x78
+#define R16_OFF 0x80
+#define R17_OFF 0x88
+#define R18_OFF 0x90
+#define R19_OFF 0x98
+#define R20_OFF 0xa0
+#define R21_OFF 0xa8
+#define R22_OFF 0xb0
+#define R23_OFF 0xb8
+#define R24_OFF 0xc0
+#define R25_OFF 0xc8
+#define R26_OFF 0xd0
+#define R27_OFF 0xd8
+#define R28_OFF 0xe0
+#define R29_OFF 0xe8
+#define R30_OFF 0xf0
+#define R31_OFF 0xf8
+#define SR_OFF 0x100
+#define CAUSE_OFF 0x108
+#define EPC_OFF 0x110
+#define BADVA_OFF 0x118
+#define ERROR_EPC_OFF 0x120
+#define CACHE_ERR_OFF 0x128
+#define NMISR_OFF 0x130
+
+#endif /* __ASM_SN_NMI_H */
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