root/arch/x86/boot/vesa.h

INCLUDED FROM

/* ----------------------------------------------------------------------- *
 *
 *   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 */