42 lines
945 B
C
42 lines
945 B
C
#pragma once
|
|
#include <luna/Types.h>
|
|
|
|
const usize ARCH_PAGE_SIZE = 4096;
|
|
const usize ARCH_HUGE_PAGE_SIZE = 2 * 1024 * 1024; // 2 MiB
|
|
|
|
struct [[gnu::packed]] PageTableEntry
|
|
{
|
|
union {
|
|
struct [[gnu::packed]]
|
|
{
|
|
bool present : 1;
|
|
bool read_write : 1;
|
|
bool user : 1;
|
|
bool write_through : 1;
|
|
bool cache_disabled : 1;
|
|
bool accessed : 1;
|
|
bool ignore0 : 1;
|
|
bool larger_pages : 1;
|
|
bool global : 1;
|
|
u8 available : 3;
|
|
u64 address : 48;
|
|
u8 available2 : 3;
|
|
bool no_execute : 1;
|
|
};
|
|
u64 raw;
|
|
};
|
|
|
|
void set_address(u64 addr);
|
|
u64 get_address() const;
|
|
|
|
void clear();
|
|
};
|
|
|
|
struct alignas(ARCH_PAGE_SIZE) PageDirectory
|
|
{
|
|
PageTableEntry entries[512];
|
|
};
|
|
|
|
static_assert(sizeof(PageTableEntry) == 8UL);
|
|
static_assert(sizeof(PageDirectory) == ARCH_PAGE_SIZE);
|