Contains code and definitons for Paging. More...

#include <basics.h>
#include <userland.h>
#include <limine.h>

Include dependency graph for paging.h:

This graph shows which files directly or indirectly include this file:

Macros
#define	PAGE_SIZE 4096ULL
#define	PAGE_PRESENT 0x1
#define	PAGE_RW 0x2
#define	PAGE_USER 0x4
#define	PAGE_NX (1ULL << 63)
#define	USER_CODE_FLAGS (PAGE_PRESENT \| PAGE_USER \| PAGE_RW )
#define	USER_DATA_FLAGS (PAGE_PRESENT \| PAGE_USER \| PAGE_RW \| PAGE_NX)

Functions
void	map_user_page (uint64_t virt, uint64_t phys, uint64_t flags)
	Function to map userland pages.
void	unmap_user_page (uint64_t virt)
void	paging_set_hhdm_offset (uint64_t offset)
	Sets the HHDM offset used to access physical memory virtually.
uintptr_t	allocate_page (void)
uintptr_t	allocate_pages (size_t count)
uint64_t	virtual_to_physical (uint64_t virt)
uint64_t	fast_virt_to_phys (void *v)
uint64_t	virt_to_phys (void *v)

Variables
struct limine_memmap_response *	memmap

Detailed Description

Contains code and definitons for Paging.

Author: Pradosh (prado.nosp@m.shga.nosp@m.me@gm.nosp@m.ail..nosp@m.com)

Version: 0.1

Date: 2023-12-17

Copyright: Copyright (c) Pradosh 2023

Definition in file paging.h.

Macro Definition Documentation

◆ PAGE_NX

#define PAGE_NX (1ULL << 63)

Definition at line 23 of file paging.h.

◆ PAGE_PRESENT

#define PAGE_PRESENT 0x1

Definition at line 20 of file paging.h.

◆ PAGE_RW

#define PAGE_RW 0x2

Definition at line 21 of file paging.h.

◆ PAGE_SIZE

#define PAGE_SIZE 4096ULL

Definition at line 18 of file paging.h.

◆ PAGE_USER

#define PAGE_USER 0x4

Definition at line 22 of file paging.h.

◆ USER_CODE_FLAGS

#define USER_CODE_FLAGS (PAGE_PRESENT | PAGE_USER | PAGE_RW )

Definition at line 25 of file paging.h.

◆ USER_DATA_FLAGS

#define USER_DATA_FLAGS (PAGE_PRESENT | PAGE_USER | PAGE_RW | PAGE_NX)

Definition at line 26 of file paging.h.

Function Documentation

◆ map_user_page()

void map_user_page	(	uint64_t	virt,
		uint64_t	phys,
		uint64_t	flags )

Function to map userland pages.

Parameters

virt	Virtual memory address of user
phys	Physical memory address of kernel's user code.
flags	Permissions

◆ paging_set_hhdm_offset()

void paging_set_hhdm_offset ( uint64_t offset )

Sets the HHDM offset used to access physical memory virtually.