mmap.c File Reference

#include <Mm\mmap.h>
#include <Mm\vmarea.h>
#include <aucon.h>
#include <Drivers/uart.h>
#include <Hal\AA64\aa64lowlevel.h>
#include <list.h>
#include <_null.h>
#include <Mm/vmmngr.h>
#include <Mm/kmalloc.h>
#include <Mm/pmmngr.h>

Include dependency graph for mmap.c:

Classes
struct	_sh_memap_object_

Macros
#define	PROTECTION_FLAG_READONLY   1<<0
#define	PROTECTION_FLAG_WRITE   1<<1
#define	PROTECTION_FLAG_NO_EXEC   1<<2
#define	PROTECTION_FLAG_NO_CACHE   1<<3
#define	MEMMAP_FLAG_SHARED   1<<0
#define	MEMMAP_FLAG_COW   1<<1
#define	MEMMAP_FLAG_PRIVATE   1<<2
#define	MEMMAP_FLAG_DISCARD_FILE_READ   1<<3

Typedefs
typedef struct _sh_memap_object_	AuSharedMmapObject

Functions
void	SharedMemMapListInitialise ()
	SharedMemMapListInitialise – initialise the shared memory map list.
AuSharedMmapObject *	AuCreateSharedMmapObject (char *name)
	AuCreateSharedMmapObject – create a global object.
void	AuAddSharedMmapObject (AuSharedMmapObject *obj)
void	AuRemoveSharedMmapObject (AuSharedMmapObject *obj)
AuSharedMmapObject *	AuSharedMmapObjectFindByName (char *name)
void *	CreateMemMapping (void *address, size_t len, int prot, int flags, int fd, uint64_t offset)
	CreateMemMapping – Create a memory mapping of just memory, file or device.
void	MemMapDirty (void *startingVaddr, size_t len, int flags, int prot)
	MemMapDirty – dirty update previously allocated memory map.
void	UnmapMemMapping (void *address, size_t len)
	UnmapMemMapping – unmaps a memory mapping.

Variables
list_t *	shmmaplist

Detailed Description

BSD 2-Clause License

Copyright (c) 2022-2023, Manas Kamal Choudhury All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Macro Definition Documentation

MEMMAP_FLAG_COW

#define MEMMAP_FLAG_COW   1<<1

MEMMAP_FLAG_DISCARD_FILE_READ

#define MEMMAP_FLAG_DISCARD_FILE_READ   1<<3

MEMMAP_FLAG_PRIVATE

#define MEMMAP_FLAG_PRIVATE   1<<2

MEMMAP_FLAG_SHARED

#define MEMMAP_FLAG_SHARED   1<<0

PROTECTION_FLAG_NO_CACHE

#define PROTECTION_FLAG_NO_CACHE   1<<3

PROTECTION_FLAG_NO_EXEC

#define PROTECTION_FLAG_NO_EXEC   1<<2

PROTECTION_FLAG_READONLY

#define PROTECTION_FLAG_READONLY   1<<0

PROTECTION_FLAG_WRITE

#define PROTECTION_FLAG_WRITE   1<<1

Typedef Documentation

AuSharedMmapObject

typedef struct _sh_memap_object_ AuSharedMmapObject

Function Documentation

AuAddSharedMmapObject()

void AuAddSharedMmapObject

(

AuSharedMmapObject *

obj

)

AuCreateSharedMmapObject()

AuSharedMmapObject * AuCreateSharedMmapObject

(

char *

name

)

AuCreateSharedMmapObject – create a global object.

AuRemoveSharedMmapObject()

void AuRemoveSharedMmapObject

(

AuSharedMmapObject *

obj

)

AuSharedMmapObjectFindByName()

AuSharedMmapObject * AuSharedMmapObjectFindByName

(

char *

name

)

CreateMemMapping()

void * CreateMemMapping	(	void *	address,
		size_t	len,
		int	prot,
		int	flags,
		int	fd,
		uint64_t	offset
	)

CreateMemMapping – Create a memory mapping of just memory, file or device.

Parameters

address	– address from where mapping start, if null, kernel will find by its own
len	– length of the address
prot	– protection flags
flags	– flags
fd	– file descriptor, -1 for no file descriptor
offset	– byte offset for file and device

Returns

Pointer to starting

MemMapDirty()

void MemMapDirty	(	void *	startingVaddr,
		size_t	len,
		int	flags,
		int	prot
	)

MemMapDirty – dirty update previously allocated memory map.

Parameters

startingVaddr	– starting address
len	– length in bytes
flags	– memory map flags
prot	– protection flags

SharedMemMapListInitialise()

void SharedMemMapListInitialise

(

)

SharedMemMapListInitialise – initialise the shared memory map list.

UnmapMemMapping()

void UnmapMemMapping	(	void *	address,
		size_t	len
	)

UnmapMemMapping – unmaps a memory mapping.

Parameters

address	– address from where mapping starts
len	– length of the mapping

Variable Documentation

shmmaplist

list_t* shmmaplist