/***************************************************************************/
/**                                                                       **/
/** HPE CONFIDENTIAL. This software is confidential proprietary software  **/
/** licensed by Hewlett-Packard Enterprise Development, LP, and is not    **/
/** authorized to be used, duplicated OR disclosed to anyone without the  **/
/** prior written permission of HPE.                                      **/
/** © 2023 Copyright Hewlett-Packard Enterprise Development, LP           **/
/**                                                                       **/
/** VMS SOFTWARE, INC. CONFIDENTIAL. This software is confidential        **/
/** proprietary software licensed by VMS Software, Inc., and is not       **/
/** authorized to be used, duplicated or disclosed to anyone without      **/
/** the prior written permission of VMS Software, Inc.                    **/
/** © 2023 Copyright VMS Software, Inc.                                   **/
/**                                                                       **/
/***************************************************************************/
/********************************************************************************************************************************/
/* Created:  9-Nov-2023 12:06:54 by OpenVMS SDL V3.7       */
/* Source:  18-JUN-2005 15:16:57 $1$DGA8345:[LIB_H.SRC]DIDTDEF.SDL;1 */
/********************************************************************************************************************************/
/*** MODULE didtdef ***/
#ifndef __DIDTDEF_LOADED
#define __DIDTDEF_LOADED 1
 
#pragma __nostandard			 /* This file uses non-ANSI-Standard features */
#pragma __member_alignment __save
#pragma __nomember_alignment
#ifdef __INITIAL_POINTER_SIZE			 /* Defined whenever ptr size pragmas supported */
#pragma __required_pointer_size __save		 /* Save the previously-defined required ptr size */
#pragma __required_pointer_size __short		 /* And set ptr size default to 32-bit pointers */
#endif
 
#ifdef __cplusplus
    extern "C" {
#define __unknown_params ...
#define __optional_params ...
#else
#define __unknown_params
#define __optional_params ...
#endif
 
#ifndef __struct
#if !defined(__VAXC)
#define __struct struct
#else
#define __struct variant_struct
#endif
#endif
 
#ifndef __union
#if !defined(__VAXC)
#define __union union
#else
#define __union variant_union
#endif
#endif
 
#define DIDT$K_SPURIOUS_IRQ 15
#define DIDT$K_MAX_ENTRIES 256
#define DIDT$K_MIN_DEV_VEC 32
#define DIDT$K_MAX_DEV_VEC 223
/* Historically, the first quad in an SCB entry was a pointer to the entry  */
/* point of IOC$INTDISP() in [SYS]IOCINDISP.MAR. The second quad consisted  */
/* of a 32-bit pointer to a VEC struct in the low longword and the SCB      */
/* offset in the high longword. In the Alpha, PAL code would jump to the    */
/* entry point stored int the first quadword, IOC$INTDISP(), and that routine */
/* would unpackage the VEC structure to get the procedure descriptor for the */
/* ISR of the interrupts.                                                   */
/*                                                                          */
/* For IA64, though we retain the historical names of these fields, the     */
/* first quadword is vacant. The second quadword still has the VEC in the   */
/* low longword and the SCB vector in the high longword.                    */
/*                                                                          */
/* In IA64, the irq$$dispatcher() routine called by SWIS when there is a device */
/* interrupt will unpackage the VEC structure to find the function descriptor */
/* of the ISR for the interrupting device. It will then call the ISR through */
/* its function descriptor.                                                 */
/*                                                                          */
/*                                                                          */
#define DIDT$K_SIZE 16
	
#if !defined(__NOBASEALIGN_SUPPORT)  && !defined(__cplusplus)   /* If using pre DECC V4.0 or C++ */
#pragma __nomember_alignment __octaword
#else
#pragma __nomember_alignment
#endif
typedef struct _didt {
#if !defined(__NOBASEALIGN_SUPPORT)  && !defined(__cplusplus)   /* If using pre DECC V4.0 or C++ */
#pragma __nomember_alignment __quadword
#else
#pragma __nomember_alignment
#endif
    __union  {
#pragma __nomember_alignment
        __int64 didt$q_isr;             /* historical SCB name of this quad */
#if !defined(__NOBASEALIGN_SUPPORT)  && !defined(__cplusplus)   /* If using pre DECC V4.0 or C++ */
#pragma __nomember_alignment __quadword
#else
#pragma __nomember_alignment
#endif
        __struct  {
#pragma __nomember_alignment
            int didt$l_crb_sqfl;        /* Shr Intr queue FLINK             */
            int didt$l_crb_sqbl;        /* Shr Intr queue BLINK             */
            } didt$r_qhdr;
        } didt$r_qw0;
#if !defined(__NOBASEALIGN_SUPPORT)  && !defined(__cplusplus)   /* If using pre DECC V4.0 or C++ */
#pragma __nomember_alignment __quadword
#else
#pragma __nomember_alignment
#endif
    __union  {
#pragma __nomember_alignment
        __int64 didt$q_arg;             /* historical SCB name of this quad */
        __struct  {
            int didt$l_vec;             /* must be cast as (VEC*) in C      */
            int didt$l_scb_offset;      /* SCB offset of this entry         */
            } didt$r_fields;
        } didt$r_qw1;
    } DIDT;
 
#if !defined(__VAXC)
#define didt$q_isr didt$r_qw0.didt$q_isr
#define didt$l_crb_sqfl didt$r_qw0.didt$r_qhdr.didt$l_crb_sqfl
#define didt$l_crb_sqbl didt$r_qw0.didt$r_qhdr.didt$l_crb_sqbl
#define didt$q_arg didt$r_qw1.didt$q_arg
#define didt$r_fields	didt$r_qw1.didt$r_fields
#define didt$l_vec didt$r_fields.didt$l_vec
#define didt$l_scb_offset didt$r_fields.didt$l_scb_offset
#endif		/* #if !defined(__VAXC) */
 
/*                                                                          */
/*                                                                          */
/* These constants enumerate the Interrupt Delievery Technologies considered */
/* by the routines that handle interrupt configuration and dispatch.        */
/*                                                                          */
#define INTDEL$K_IOSAPIC 0
#define INTDEL$K_MSI 1
#define INTDEL$K_MSIX 2
 
#pragma __member_alignment __restore
#ifdef __INITIAL_POINTER_SIZE			 /* Defined whenever ptr size pragmas supported */
#pragma __required_pointer_size __restore		 /* Restore the previously-defined required ptr size */
#endif
#ifdef __cplusplus
    }
#endif
#pragma __standard
 
#endif /* __DIDTDEF_LOADED */