vesa.h

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/* ----------------------------------------------------------------------- *
 *
 *   Copyright 1999-2007 H. Peter Anvin - All Rights Reserved
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, Inc., 53 Temple Place Ste 330,
 *   Boston MA 02111-1307, USA; either version 2 of the License, or
 *   (at your option) any later version; incorporated herein by reference.
 *
 * ----------------------------------------------------------------------- */

#ifndef BOOT_VESA_H
#define BOOT_VESA_H

typedef struct {
    u16 off, seg;
} far_ptr;

/* VESA General Information table */
struct vesa_general_info {
    u32 signature;      /* 0 Magic number = "VESA" */
    u16 version;        /* 4 */
    far_ptr vendor_string;  /* 6 */
    u32 capabilities;   /* 10 */
    far_ptr video_mode_ptr; /* 14 */
    u16 total_memory;   /* 18 */

    u8 reserved[236];   /* 20 */
} __attribute__ ((packed));

#define VESA_MAGIC ('V' + ('E' << 8) + ('S' << 16) + ('A' << 24))

struct vesa_mode_info {
    u16 mode_attr;      /* 0 */
    u8 win_attr[2];     /* 2 */
    u16 win_grain;      /* 4 */
    u16 win_size;       /* 6 */
    u16 win_seg[2];     /* 8 */
    far_ptr win_scheme; /* 12 */
    u16 logical_scan;   /* 16 */

    u16 h_res;      /* 18 */
    u16 v_res;      /* 20 */
    u8 char_width;      /* 22 */
    u8 char_height;     /* 23 */
    u8 memory_planes;   /* 24 */
    u8 bpp;         /* 25 */
    u8 banks;       /* 26 */
    u8 memory_layout;   /* 27 */
    u8 bank_size;       /* 28 */
    u8 image_planes;    /* 29 */
    u8 page_function;   /* 30 */

    u8 rmask;       /* 31 */
    u8 rpos;        /* 32 */
    u8 gmask;       /* 33 */
    u8 gpos;        /* 34 */
    u8 bmask;       /* 35 */
    u8 bpos;        /* 36 */
    u8 resv_mask;       /* 37 */
    u8 resv_pos;        /* 38 */
    u8 dcm_info;        /* 39 */

    u32 lfb_ptr;        /* 40 Linear frame buffer address */
    u32 offscreen_ptr;  /* 44 Offscreen memory address */
    u16 offscreen_size; /* 48 */

    u8 reserved[206];   /* 50 */
} __attribute__ ((packed));

#endif              /* LIB_SYS_VESA_H */