michaelkuc6/blog_os
1
0
Fork 0
mirror of https://github.com/phil-opp/blog_os.git synced 2025-12-16 14:27:49 +00:00
Code Issues Projects Releases Wiki Activity

Change title and add some incomplete introduction variants

Browse Source
This commit is contained in:
Philipp Oppermann
2015-12-07 18:23:13 +01:00
parent 2b8838459c
commit fd42d634ad
1 changed files with 6 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
posts/DRAFT-paging.md
View File

@@ -1,10 +1,14 @@
---
layout: post
title: 'A Paging Module'
title: 'Accessing and Modifying Page Tables'
---
TODO
In this post we will create a paging module, which uses recursive mapping to access and modify page tables.
In this post we will create a paging module, which allows us to access and modify the 4-level page table. We will create functions to translate a virtual to a physical address.
## Paging
_Paging_ is a memory management scheme that separates virtual and physical memory. The address space is split into equal sized _pages_ and _page tables_ specify which virtual page points to which physical page. For an extensive paging introduction take a look at the paging chapter ([PDF][paging chapter]) of the [Three Easy Pieces] OS book.
@@ -708,6 +712,7 @@ We can also free the P1, P2, or even P3 table when the last entry is freed. But
_Spoiler_: There is an ugly bug in this function, which we will find in the next section.
## Testing it
TODO
## What's next?