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Recursive map the P4 table

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Philipp Oppermann
2015-12-09 00:10:50 +01:00
parent 96b0dc0c66
commit e071c24680
2 changed files with 7 additions and 0 deletions
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5
src/arch/x86_64/boot.asm
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@@ -42,6 +42,11 @@ start:
jmp gdt64.code:long_mode_start jmp gdt64.code:long_mode_start
setup_page_tables: setup_page_tables:
; recursive map P4
mov eax, p4_table
or eax, 0b11 ; present + writable
mov [p4_table + 511 * 8], eax
; map first P4 entry to P3 table ; map first P4 entry to P3 table
mov eax, p3_table mov eax, p3_table
or eax, 0b11 ; present + writable or eax, 0b11 ; present + writable

2
src/memory/paging/table.rs
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@@ -2,6 +2,8 @@ use memory::paging::entry::*;
use memory::paging::ENTRY_COUNT; use memory::paging::ENTRY_COUNT;
use core::ops::{Index, IndexMut}; use core::ops::{Index, IndexMut};
pub const P4: *mut Table = 0xffffffff_fffff000 as *mut _;
pub struct Table { pub struct Table {
entries: [Entry; ENTRY_COUNT], entries: [Entry; ENTRY_COUNT],
} }