vmem_map.h File Reference

Virtual memory mapping routines. More...

Go to the source code of this file.

Classes
struct	virt_map_page_manager_t
	Virtual mapping manager. More...
struct	virt_map_page_t
	Virtual mapping. More...

Macros
#define	VIRTUAL_MEMORY_SIZE_MB   128
	Size of the virtual memory.

Typedefs
typedef struct virt_map_page_manager_t	virt_map_page_manager_t
	Virtual mapping manager.
typedef struct virt_map_page_t	virt_map_page_t
	Virtual mapping.

Functions
int	virt_init (void)
	Initialize the virtual memory mapper. More...
uint32_t	virt_map_physical_pages (page_t *page, int pfn_count)
	Maps physical pages to virtual memory. More...
virt_map_page_t *	virt_map_alloc (uint32_t size)
	Allocates virtual pages for a given size. More...
uint32_t	virt_map_vaddress (mm_struct_t *mm, virt_map_page_t *vpage, uint32_t vaddr, uint32_t size)
	Maps a virtual address to a virtual memory area. More...
int	virtual_check_address (uint32_t addr)
	Checks if an address belongs to the virtual memory mapping. More...
int	virt_unmap (uint32_t addr)
	Unmaps a virtual address from the virtual memory. More...
int	virt_unmap_pg (virt_map_page_t *page)
	Unmap a page. More...
void	virt_memcpy (mm_struct_t *dst_mm, uint32_t dst_vaddr, mm_struct_t *src_mm, uint32_t src_vaddr, uint32_t size)
	Memcpy from different processes virtual addresses. More...

Detailed Description

Virtual memory mapping routines.

Copyright

(c) 2014-2024 This file is distributed under the MIT License. See LICENSE.md for details.

Function Documentation

virt_init()

int virt_init

(

void

)

Initialize the virtual memory mapper.

Returns

Returns 0 on success, or -1 if an error occurs.

virt_map_alloc()

virt_map_page_t* virt_map_alloc

(

uint32_t

size

)

Allocates virtual pages for a given size.

Parameters

size	The size in bytes to allocate.

Returns

Pointer to the allocated virtual pages, or NULL on failure.

virt_map_physical_pages()

uint32_t virt_map_physical_pages	(	page_t *	page,
		int	pfn_count
	)

Maps physical pages to virtual memory.

Parameters

page	Pointer to the physical page.
pfn_count	The number of page frames to map.

Returns

The virtual address of the mapped pages, or 0 on failure.

virt_map_vaddress()

uint32_t virt_map_vaddress	(	mm_struct_t *	mm,
		virt_map_page_t *	vpage,
		uint32_t	vaddr,
		uint32_t	size
	)

Maps a virtual address to a virtual memory area.

Parameters

mm	Pointer to the memory management structure.
vpage	Pointer to the virtual map page.
vaddr	The virtual address to map.
size	The size of the memory area to map.

Returns

The starting virtual address of the mapped area, or 0 on failure.

virt_memcpy()

void virt_memcpy	(	mm_struct_t *	dst_mm,
		uint32_t	dst_vaddr,
		mm_struct_t *	src_mm,
		uint32_t	src_vaddr,
		uint32_t	size
	)

Memcpy from different processes virtual addresses.

Parameters

dst_mm	The destination memory struct
dst_vaddr	The destination memory address
src_mm	The source memory struct
src_vaddr	The source memory address
size	The size in bytes of the copy

virt_unmap()

int virt_unmap

(

uint32_t

addr

)

Unmaps a virtual address from the virtual memory.

Parameters

addr	The virtual address to unmap.

Returns

Returns 0 on success, or -1 if an error occurs.

virt_unmap_pg()

int virt_unmap_pg

(

virt_map_page_t *

page

)

Unmap a page.

Parameters

page	Pointer to the page to unmap.

Returns

Returns 0 on success, or -1 if an error occurs.

virtual_check_address()

int virtual_check_address

(

uint32_t

addr

)

Checks if an address belongs to the virtual memory mapping.

Parameters

addr	The address to check.

Returns

1 if it belongs to the virtual memory mapping, 0 otherwise.