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Finish implementation of virtual allocator

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This commit is contained in:
Baptiste Wicht 2014-02-07 18:47:47 +01:00
parent f362489750
commit ee1dfd69a5
2 changed files with 22 additions and 1 deletions
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2
kernel/src/boot/boot_16.cpp
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@ -123,6 +123,8 @@ void setup_vesa(){
vesa::vbe_info_block.signature[2] = 'E';
vesa::vbe_info_block.signature[3] = '2';
return;
uint16_t return_code;
asm volatile ("int 0x10"
: "=a"(return_code)

21
kernel/src/virtual_allocator.cpp
View File

@ -10,6 +10,7 @@
#include "virtual_allocator.hpp"
#include "paging.hpp"
#include "console.hpp"
#include "kernel.hpp"
namespace {
@ -256,6 +257,9 @@ size_t virtual_allocator::allocate(size_t pages){
if(pages > max_block){
if(pages > max_block * static_bitmap::bits_per_word){
k_print_line("Virtual block too big");
suspend_boot();
//That means we try to allocate more than 33M at the same time
//probably not a good idea
//TODO Implement it all the same
@ -297,7 +301,22 @@ void virtual_allocator::free(size_t address, size_t pages){
allocated_pages -= pages;
if(pages > max_block){
//TODO Special algorithm for big pages
if(pages > max_block * static_bitmap::bits_per_word){
k_print_line("Virtual block too big");
suspend_boot();
//That means we try to allocate more than 33M at the same time
//probably not a good idea
//TODO Implement it all the same
} else {
auto l = level(pages);
auto index = get_block_index(address, l);
//Mark all bits of the word as free
for(size_t b = 0; b < static_bitmap::bits_per_word; ++b){
mark_free(l, index + b);
}
}
} else {
auto l = level(pages);
auto index = get_block_index(address, l);