[−][src]Module sunrise_kernel::paging::arch::i386
Paging implementation on i386
No PAE, no PSE, just regular 2-level paging, with simple 4kB tables and pages.
Modules
| entry | i386 page table entry |
| lands | i386 Virtual Memory Layout |
| table | i386 Page Tables hierarchy |
Constants
| ENTRY_COUNT | The number of entries a page table has. On i386 a page table/directory is 1024 entries * 4 bytes per entry = 4kB, fits in 1 page. |
| PAGE_SIZE | The page size. Dictated by the MMU. In simple, elegant, sane i386 paging, a page is 4kB. |
Functions
| enable_paging⚠ | Not used anymore, bootstrap's job |
| flush_tlb | Flush the Translation Lookaside Buffer [https://wiki.osdev.org/TLB] |
| is_paging_on | Check if the paging is currently active. |
| read_cr2 | Reads the value of cr2, retrieving the address that caused a page fault |
| read_cr3 | Reads the value of cr3, retrieving the current page directory's physical address |
| swap_cr3 | Changes the content of the cr3 register, and returns the value before the change was made |