Nigel
dea8ab7d71
Added new entries to .gitignore Moved away from source directory as central spot for all source code
44 lines
1.4 KiB
C++
44 lines
1.4 KiB
C++
#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 )
|
|
{
|
|
|
|
}
|