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!C99Shell v. 1.0 pre-release build #13!
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/* $Id$
 *
 * 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, 2000 Silicon Graphics, Inc.
 * Copyright (C) 2000 by Colin Ngam
 */
#ifndef _ASM_SN_XTALK_XTALK_PRIVATE_H
#define _ASM_SN_XTALK_XTALK_PRIVATE_H

#include <asm/sn/ioerror.h>        /* for error function and arg types */

/*
 * xtalk_private.h -- private definitions for xtalk
 * crosstalk drivers should NOT include this file.
 */

/*
 * All Crosstalk providers set up PIO using this information.
 */
struct xtalk_piomap_s {
    devfs_handle_t            xp_dev;    /* a requestor of this mapping */
    xwidgetnum_t            xp_target;    /* target (node's widget number) */
    iopaddr_t               xp_xtalk_addr;    /* which crosstalk addr is mapped */
    size_t                  xp_mapsz;    /* size of this mapping */
    caddr_t                 xp_kvaddr;    /* kernel virtual address to use */
};

/*
 * All Crosstalk providers set up DMA using this information.
 */
struct xtalk_dmamap_s {
    devfs_handle_t            xd_dev;    /* a requestor of this mapping */
    xwidgetnum_t            xd_target;    /* target (node's widget number) */
};

/*
 * All Crosstalk providers set up interrupts using this information.
 */
struct xtalk_intr_s {
    devfs_handle_t            xi_dev;    /* requestor of this intr */
    xwidgetnum_t            xi_target;    /* master's widget number */
    xtalk_intr_vector_t     xi_vector;    /* 8-bit interrupt vector */
    iopaddr_t               xi_addr;    /* xtalk address to generate intr */
    void                   *xi_sfarg;    /* argument for setfunc */
    xtalk_intr_setfunc_t    xi_setfunc;        /* device's setfunc routine */
};

/*
 * Xtalk interrupt handler structure access functions
 */
#define    xtalk_intr_arg(xt)    ((xt)->xi_sfarg)

#define    xwidget_hwid_is_sn0_xswitch(_hwid)    \
        (((_hwid)->part_num == XBOW_WIDGET_PART_NUM ) &&      \
         ((_hwid)->mfg_num == XBOW_WIDGET_MFGR_NUM ))

#define    xwidget_hwid_is_sn1_xswitch(_hwid)    \
        (((_hwid)->part_num == XXBOW_WIDGET_PART_NUM ) &&      \
         ((_hwid)->mfg_num == XXBOW_WIDGET_MFGR_NUM ))

#define    xwidget_hwid_is_xswitch(_hwid)    \
        (xwidget_hwid_is_sn0_xswitch(_hwid) ||            \
            xwidget_hwid_is_sn1_xswitch(_hwid))

/* common iograph info for all widgets,
 * stashed in FASTINFO of widget connection points.
 */
struct xwidget_info_s {
    char                   *w_fingerprint;
    devfs_handle_t            w_vertex;    /* back pointer to vertex */
    xwidgetnum_t            w_id;    /* widget id */
    struct xwidget_hwid_s   w_hwid;    /* hardware identification (part/rev/mfg) */
    devfs_handle_t            w_master;    /* CACHED widget's master */
    xwidgetnum_t            w_masterid;        /* CACHED widget's master's widgetnum */
    error_handler_f        *w_efunc;    /* error handling function */
    error_handler_arg_t     w_einfo;    /* first parameter for efunc */
    char           *w_name;    /* canonical hwgraph name */    
};

extern char             widget_info_fingerprint[];

#endif                /* _ASM_SN_XTALK_XTALK_PRIVATE_H */

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