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vesa.h

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

      u16 oem_software_rev;   /* 20 */
      far_ptr oem_vendor_name_ptr;  /* 22 */
      far_ptr oem_product_name_ptr; /* 26 */
      far_ptr oem_product_rev_ptr;  /* 30 */

      u8 reserved[222]; /* 34 */
      u8 oem_data[256]; /* 256 */
} __attribute__ ((packed));

#define VESA_MAGIC ('V' + ('E' << 8) + ('S' << 16) + ('A' << 24))
#define VBE2_MAGIC ('V' + ('B' << 8) + ('E' << 16) + ('2' << 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 */

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