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Prepare VESA/VBE structures

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Baptiste Wicht 2014-01-11 12:03:52 +01:00
parent 6fd29134ca
commit e7b45e9490
2 changed files with 105 additions and 0 deletions
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97
kernel/include/vesa.hpp Normal file
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//=======================================================================
// Copyright Baptiste Wicht 2013.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//=======================================================================
#ifndef VESA_H
#define VESA_H
namespace vesa {
struct vbe_info_block {
char[4] signature; //"VESA"
uint16_t version; // == 0x0300 for VBE 3.0
uint16_t[2] oem_name_ptr;
uint8_t[4] capabilities;
uint16_t[2] video_modes_ptr;
uint16_t total_memory; // as # of 64KB blocks
//VBE 2.0
uint16_t oem_software_version;
uint16_t[2] vendor_name_ptr;
uint16_t[2] product_name_ptr;
uint16_t[2] product_revision_ptr;
uint16_t vbe_af_version;
uint16_t[2] accelerator_video_modes_ptr;
uint8_t[216] reserved;
uint8_t[256] oem_scratchpad;
} __attribute__((packed));
static_assert(sizeof(vbe_info_block) == 512, "The size of a VBE info block is 512 bytes");
struct mode_info_block {
uint16_t mode_attributes;
uint8_t window_a_attributes;
uint8_t window_b_attributes;
uint16_t window_granularity;
uint16_t window_size;
uint16_t segment_window_a;
uint16_t segment_window_b;
uint16_t[2] window_position_function;
uint16_t pitch; //Bytes per scan line
//OEM modes
uint16_t width;
uint16_t height;
uint8_t width_char;
uint8_t height_char;
uint8_t memory_planes;
uint8_t bpp;
uint8_t banks;
uint8_t memory_model;
uint8_t bank_size;
uint8_t image_pages;
uint8_t reserved;
//VBE 1.2+
uint8_t red_mask_size;
uint8_t red_mask_position;
uint8_t green_mask_size;
uint8_t green_mask_position;
uint8_t blue_mask_size;
uint8_t blue_mask_position;
uint8_t reserved_mask_size;
uint8_t reserved__mask_position;
uint8_t directcolor_attributes;
//VBE 2.0+
uint16_t[2] linear_video_buffer; //LFB (Linear Framebuffer) address
uint16_t[2] offscreen_memory;
uint16_t offscreen_memory_size;
uint16_t bytes_per_scan_line;
uint8_t number_of_images_banked;
uint8_t number_of_images_linear;
uint8_t linear_red_mask_size;
uint8_t linear_red_mask_position;
uint8_t linear_green_mask_size;
uint8_t linear_green_mask_position;
uint8_t linear_blue_mask_size;
uint8_t linear_blue_mask_position;
uint8_t linear_reserved_mask_size;
uint8_t linear_reserved_mask_position;
uint16_t[2] maximum_pixel_clock;
uint8_t[190] reserved;
} __attribute__((packed));
static_assert(sizeof(mode_info_block) == 256, "The size of a mode info block is 256 bytes");
} //end of vesa namespace
#endif

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kernel/src/vesa.cpp Normal file
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//=======================================================================
// Copyright Baptiste Wicht 2013.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//=======================================================================
#include "vesa.hpp"