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Annotation of Gnu-Mach/chips/pm_defs.h, revision 1.1.1.1

1.1       root        1: /* 
                      2:  * Mach Operating System
                      3:  * Copyright (c) 1991,1990,1989 Carnegie Mellon University
                      4:  * All Rights Reserved.
                      5:  * 
                      6:  * Permission to use, copy, modify and distribute this software and its
                      7:  * documentation is hereby granted, provided that both the copyright
                      8:  * notice and this permission notice appear in all copies of the
                      9:  * software, derivative works or modified versions, and any portions
                     10:  * thereof, and that both notices appear in supporting documentation.
                     11:  * 
                     12:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
                     13:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
                     14:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
                     15:  * 
                     16:  * Carnegie Mellon requests users of this software to return to
                     17:  * 
                     18:  *  Software Distribution Coordinator  or  [email protected]
                     19:  *  School of Computer Science
                     20:  *  Carnegie Mellon University
                     21:  *  Pittsburgh PA 15213-3890
                     22:  * 
                     23:  * any improvements or extensions that they make and grant Carnegie Mellon
                     24:  * the rights to redistribute these changes.
                     25:  */
                     26: /*
                     27:  *     File: pm_defs.h
                     28:  *     Author: Alessandro Forin, Carnegie Mellon University
                     29:  *     Date:   9/90
                     30:  *
                     31:  *     Definitions specific to the "pm" simple framebuffer driver,
                     32:  *     exported across sub-modules.  Some other framebuffer drivers
                     33:  *     that share code with pm use these defs also.
                     34:  */
                     35: 
                     36: /* Hardware state (to be held in the screen descriptor) */
                     37: 
                     38: typedef struct {
                     39:        char            *cursor_registers;      /* opaque, for sharing */
                     40:        unsigned short  cursor_state;           /* some regs are W-only */
                     41:        short           unused;                 /* padding, free */
                     42:        char            *vdac_registers;        /* opaque, for sharing */
                     43:        unsigned char   *framebuffer;
                     44:        unsigned char   *plane_mask;
                     45: } pm_softc_t;
                     46: 
                     47: extern pm_softc_t      *pm_alloc(/* unit, curs, framebuf, planem */);
                     48: 
                     49: /* user mapping sizes */
                     50: #define        USER_INFO_SIZE  PAGE_SIZE
                     51: #define        PMASK_SIZE      PAGE_SIZE
                     52: #define        BITMAP_SIZE(sc)                                         \
                     53:        ((sc)->frame_height * (((sc)->flags & COLOR_SCREEN) ?   \
                     54:                sc->frame_scanline_width :                      \
                     55:                sc->frame_scanline_width>>3))
                     56: 
                     57: #define        PM_SIZE(sc)     (USER_INFO_SIZE+PMASK_SIZE+BITMAP_SIZE(sc))

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