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Fix VESA

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This commit is contained in:
Baptiste Wicht 2014-01-24 22:33:19 +01:00
parent 79417d5b63
commit 552f4bbfb7
1 changed files with 17 additions and 3 deletions
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20
kernel/src/vesa.cpp
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@ -9,8 +9,10 @@
#include "vesa.hpp"
#include "paging.hpp"
#include "virtual_allocator.hpp"
#include "console.hpp"
#include "kernel.hpp"
/**
* VESA Drawing implementation.
@ -52,8 +54,8 @@ void init_font(){
void vesa::init(){
auto& block = vesa::mode_info_block;
//Compute the address of the LFB
screen = reinterpret_cast<uint32_t*>(block.linear_video_buffer);
//Get the physicaladdress of the LFB
auto physical = block.linear_video_buffer;
x_shift = 1;
y_shift = block.bytes_per_scan_line / 4;
@ -69,7 +71,19 @@ void vesa::init(){
auto bytes = left_padding + paging::PAGE_SIZE + total_size;
auto pages = (bytes / paging::PAGE_SIZE) + 1;
paging::identity_map_pages(reinterpret_cast<void*>(first_page), pages);
auto virt = virtual_allocator::allocate(pages);
if(!virt){
//TODO Should print a message or go back to text console
suspend_boot();
}
if(!paging::map_pages(reinterpret_cast<void*>(virt), reinterpret_cast<void*>(physical), pages)){
//TODO Should print a message or go back to text console
suspend_boot();
}
screen = reinterpret_cast<uint32_t*>(virt);
init_font();
}