FreeBSD/Linux Kernel Cross Reference
sys/dev/ic/pcdisplayvar.h

     /* $OpenBSD: pcdisplayvar.h,v 1.13 2020/05/25 09:55:48 jsg Exp $ */
     /* $NetBSD: pcdisplayvar.h,v 1.8 2000/01/25 02:44:03 ad Exp $ */
     
     /*
      * Copyright (c) 1998
      *      Matthias Drochner.  All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     *
     */
    
    struct pcdisplayscreen {
            struct pcdisplay_handle *hdl;
    
            const struct wsscreen_descr *type;
    
            int active;             /* currently displayed */
            u_int16_t *mem;         /* backing store for contents */
    
            int cursoron;           /* cursor displayed? */
    #ifdef PCDISPLAY_SOFTCURSOR
            int cursortmp;          /* glyph & attribute behind software cursor */
    #endif
            int vc_ccol, vc_crow;   /* current cursor position */
    
            int dispoffset;         /* offset of displayed area in video mem */
            int visibleoffset;
    };
    
    struct pcdisplay_handle {
            bus_space_tag_t ph_iot, ph_memt;
            bus_space_handle_t ph_ioh_6845, ph_memh;
    };
    
    static inline u_int8_t _pcdisplay_6845_read(struct pcdisplay_handle *, int);
    static inline void _pcdisplay_6845_write(struct pcdisplay_handle *,
                                                  int, u_int8_t);
    
    static inline u_int8_t
    _pcdisplay_6845_read(struct pcdisplay_handle *ph, int reg)
    {
            bus_space_write_1(ph->ph_iot, ph->ph_ioh_6845, MC6845_INDEX, reg);
            return (bus_space_read_1(ph->ph_iot, ph->ph_ioh_6845, MC6845_DATA));
    }
    
    static inline void
    _pcdisplay_6845_write(struct pcdisplay_handle *ph, int reg, u_int8_t val)
    {
            bus_space_write_1(ph->ph_iot, ph->ph_ioh_6845, MC6845_INDEX, reg);
            bus_space_write_1(ph->ph_iot, ph->ph_ioh_6845, MC6845_DATA, val);
    }
    
    #define pcdisplay_6845_read(ph, reg) \
            _pcdisplay_6845_read(ph, offsetof(struct reg_mc6845, reg))
    #define pcdisplay_6845_write(ph, reg, val) \
            _pcdisplay_6845_write(ph, offsetof(struct reg_mc6845, reg), val)
    
    void    pcdisplay_cursor_init(struct pcdisplayscreen *, int);
    void    pcdisplay_cursor_reset(struct pcdisplayscreen *);
    int     pcdisplay_cursor(void *, int, int, int);
    int     pcdisplay_mapchar(void *, int, unsigned int *);
    int     pcdisplay_putchar(void *, int, int, u_int, uint32_t);
    struct wsdisplay_charcell;
    int     pcdisplay_getchar(void *, int, int, struct wsdisplay_charcell *);
    int     pcdisplay_copycols(void *, int, int, int,int);
    int     pcdisplay_erasecols(void *, int, int, int, uint32_t);
    int     pcdisplay_copyrows(void *, int, int, int);
    int     pcdisplay_eraserows(void *, int, int, uint32_t);

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