/*
 * 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.
 *
 * Derived from IRIX <sys/SN/nmi.h>, Revision 1.5.
 *
 * Copyright (C) 1992 - 1997 Silicon Graphics, Inc.
 */
#ifndef __ASM_SN_NMI_H
#define __ASM_SN_NMI_H

#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 __ASSEMBLER__

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 /* !__ASSEMBLER__ */

/* 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 __ASSEMBLER__

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 /* !__ASSEMBLER__ */

/* 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 */