Initiate Page Directory & Page Table

[salekinsirajus]

This is the meat of the project. We can perhaps break this down later on.

• Enable paging with enable_paging() function in the control_reg.c file
• Set up and map global TEXT, DATA, BSS, HEAP and STACK sections after initiating Page Table and Page Directory (Set up Page Table and Page Directory #10)
• Enable TLB and other registers (CR0, CR4 etc) to set up the page size etc.
• Initiate page table(s) for all these processes after the end of the FFS space (for now)
• Map code, text, etc sections to the PD and PT (allocate page table entries)
• Implement allocation from FFS area
• Implement per-process page table