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/* ----------------------------------------------------------------------- *
*
* Copyright 1999-2008 H. Peter Anvin - All Rights Reserved
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall
* be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* ----------------------------------------------------------------------- */
#ifndef LIB_SYS_VESA_H
#define LIB_SYS_VESA_H
#include <inttypes.h>
#include <com32.h>
/* VESA General Information table */
struct vesa_general_info {
uint32_t signature; /* Magic number = "VESA" */
uint16_t version;
far_ptr_t vendor_string;
uint8_t capabilities[4];
far_ptr_t video_mode_ptr;
uint16_t total_memory;
uint16_t oem_software_rev;
far_ptr_t oem_vendor_name_ptr;
far_ptr_t oem_product_name_ptr;
far_ptr_t oem_product_rev_ptr;
uint8_t reserved[222];
uint8_t oem_data[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 {
uint16_t mode_attr;
uint8_t win_attr[2];
uint16_t win_grain;
uint16_t win_size;
uint16_t win_seg[2];
far_ptr_t win_scheme;
uint16_t logical_scan;
uint16_t h_res;
uint16_t v_res;
uint8_t char_width;
uint8_t char_height;
uint8_t memory_planes;
uint8_t bpp;
uint8_t banks;
uint8_t memory_layout;
uint8_t bank_size;
uint8_t image_pages;
uint8_t page_function;
uint8_t rmask;
uint8_t rpos;
uint8_t gmask;
uint8_t gpos;
uint8_t bmask;
uint8_t bpos;
uint8_t resv_mask;
uint8_t resv_pos;
uint8_t dcm_info;
uint8_t *lfb_ptr; /* Linear frame buffer address */
uint8_t *offscreen_ptr; /* Offscreen memory address */
uint16_t offscreen_size;
uint8_t reserved[206];
} __attribute__ ((packed));
struct vesa_info {
struct vesa_general_info gi;
struct vesa_mode_info mi;
};
extern struct vesa_info __vesa_info;
#if 0
static inline void vesa_debug(uint32_t color, int pos)
{
uint32_t *stp = (uint32_t *) __vesa_info.mi.lfb_ptr;
stp[pos * 3] = color;
}
#else
static inline void vesa_debug(uint32_t color, int pos)
{
(void)color;
(void)pos;
}
#endif
#endif /* LIB_SYS_VESA_H */
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