vbe.c

См. документацию.

 
#include "multiboot.h"
#include <io/ports.h> 
 
struct VbeInfoBlock {
   char     VbeSignature[4];         // == "VESA"
   uint16_t VbeVersion;              // == 0x0300 for VBE 3.0
   uint16_t OemStringPtr[2];         // isa vbeFarPtr
   uint8_t  Capabilities[4];
   uint16_t VideoModePtr[2];         // isa vbeFarPtr
   uint16_t TotalMemory;             // as # of 64KB blocks
   uint8_t  Reserved[492];
} __attribute__((packed));  // 512 b
 
struct vbe_mode_info_structure {
    uint16_t attributes;        // deprecated, only bit 7 should be of interest to you, and it indicates the mode supports a linear frame buffer.
    uint8_t window_a;           // deprecated
    uint8_t window_b;           // deprecated
    uint16_t granularity;       // deprecated; used while calculating bank numbers
    uint16_t window_size;
    uint16_t segment_a;
    uint16_t segment_b;
    uint32_t win_func_ptr;      // deprecated; used to switch banks from protected mode without returning to real mode
    uint16_t pitch;         // number of bytes per horizontal line
    uint16_t width;         // width in pixels
    uint16_t height;            // height in pixels
    uint8_t w_char;         // unused...
    uint8_t y_char;         // ...
    uint8_t planes;
    uint8_t bpp;            // bits per pixel in this mode
    uint8_t banks;          // deprecated; total number of banks in this mode
    uint8_t memory_model;
    uint8_t bank_size;      // deprecated; size of a bank, almost always 64 KB but may be 16 KB...
    uint8_t image_pages;
    uint8_t reserved0;
 
    uint8_t red_mask;
    uint8_t red_position;
    uint8_t green_mask;
    uint8_t green_position;
    uint8_t blue_mask;
    uint8_t blue_position;
    uint8_t reserved_mask;
    uint8_t reserved_position;
    uint8_t direct_color_attributes;
 
    uint32_t framebuffer;       // physical address of the linear frame buffer; write here to draw to the screen
    uint32_t off_screen_mem_off;
    uint16_t off_screen_mem_size;   // size of memory in the framebuffer but not being displayed on the screen
    uint8_t reserved1[206];
} __attribute__ ((packed));
 
void drv_vbe_init(multiboot_header_t *mboot){
    qemu_log("vbe: init");
    
    //qemu_log("vbe: point %x",point);
    
}