BarinkOS/kernel/memory/PageDirectory.cpp

#include "PageDirectory.h"

void PageDirectory::enable()
{


    // https://wiki.osdev.org/Setting_Up_Paging
    //set each entry to not present
    // int i;
    // for(i = 0; i < 1024; i++)
    // {
    //     // This sets the following flags to the pages:
    //     //   Supervisor: Only kernel-mode can access them
    //     //   Write Enabled: It can be both read from and written to
    //     //   Not Present: The page table is not present
    //     this->page_directory[i] = 0x00000002;
    // }

    // // holds the physical address where we want to start mapping these pages to.
    // // in this case, we want to map these pages to the very beginning of memory.

    // //we will fill all 1024 entries in the table, mapping 4 megabytes
    // for(unsigned int i = 0; i < 1024; i++)
    // {
    //     // As the address is page aligned, it will always leave 12 bits zeroed.
    //     // Those bits are used by the attributes ;)
    //     first_page_table[i] = (i * 0x1000) | 3; // attributes: supervisor level, read/write, present.
    // }

    // // attributes: supervisor level, read/write, present
    // this->page_directory[0] = ((unsigned int)first_page_table) | 3;

    printf("Enable Paging!\n");

    loadPageDirectory(this->page_directory);
    enablePaging();
}


void PageDirectory::MapPhysicalToVirtualAddress ( address_t PAddress , address_t VAddress, uint32_t size  )
{

}