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Philipp Oppermann
2015-12-04 11:53:08 +01:00
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6
posts/DRAFT-paging.md
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@@ -10,7 +10,6 @@ Let's begin a `memory/paging/mod.rs` module to model page tables:
```rust
pub const PAGE_SIZE: usize = 4096;
const ENTRY_SIZE: usize = 8;
const ENTRY_COUNT: usize = 512;
pub type PhysicalAddress = usize;
@@ -19,11 +18,6 @@ pub type VirtualAddress = usize;
pub struct Page {
number: usize,
}
struct Table(Page);
#[derive(Debug, Clone, Copy)]
struct TableEntry(u64);
```
We define constants for the page size, the size of an entry in a page table, and the number of entries per table. To make future function signatures more expressive, we can use the type aliases `PhysicalAddress` and `VirtualAddress`. The `Page` struct is similar to the `Frame` struct in the [previous post], but represents a virtual page instead of a physical frame.