mm.h File Reference

#include <linux/page.h>
#include <linux/sched.h>
#include <linux/errno.h>
#include <linux/kernel.h>

Go to the source code of this file.

Data Structures
struct	vm_area_struct
struct	vm_operations_struct
Defines
#define	VERIFY_READ   0
#define	VERIFY_WRITE   1
#define	BAD_PAGETABLE   __bad_pagetable()
#define	BAD_PAGE   __bad_page()
#define	ZERO_PAGE   __zero_page()
#define	MAX_SECONDARY_PAGES   20
#define	read_swap_page(nr, buf)   rw_swap_page(READ,(nr),(buf))
#define	write_swap_page(nr, buf)   rw_swap_page(WRITE,(nr),(buf))
#define	invalidate()   __asm__ __volatile__("movl %%cr3,%%eax\n\tmovl %%eax,%%cr3": : :"ax")
#define	MAP_NR(addr)   ((addr) >> PAGE_SHIFT)
#define	MAP_PAGE_RESERVED   (1<<15)
#define	PAGE_PRESENT   0x001
#define	PAGE_RW   0x002
#define	PAGE_USER   0x004
#define	PAGE_PWT   0x008
	486 only - not used currently
#define	PAGE_PCD   0x010
	486 only - not used currently
#define	PAGE_ACCESSED   0x020
#define	PAGE_DIRTY   0x040
#define	PAGE_COW   0x200
	implemented in software (one of the AVL bits)
#define	PAGE_PRIVATE   (PAGE_PRESENT | PAGE_RW | PAGE_USER | PAGE_ACCESSED | PAGE_COW)
#define	PAGE_SHARED   (PAGE_PRESENT | PAGE_RW | PAGE_USER | PAGE_ACCESSED)
#define	PAGE_COPY   (PAGE_PRESENT | PAGE_USER | PAGE_ACCESSED | PAGE_COW)
#define	PAGE_READONLY   (PAGE_PRESENT | PAGE_USER | PAGE_ACCESSED)
#define	PAGE_TABLE   (PAGE_PRESENT | PAGE_RW | PAGE_USER | PAGE_ACCESSED)
#define	GFP_BUFFER   0x00
#define	GFP_ATOMIC   0x01
#define	GFP_USER   0x02
#define	GFP_KERNEL   0x03
#define	SHM_SWP_TYPE   0x41
	vm_ops not present page codes
Typedefs
typedef int(*)	map_mergep_fnp (const struct vm_area_struct *, const struct vm_area_struct *, void *)
Functions
int	__verify_write (unsigned long addr, unsigned long count)
int	verify_area (int type, const void *addr, unsigned long size)
unsigned long	__bad_page (void)
unsigned long	__bad_pagetable (void)
unsigned long	__zero_page (void)
unsigned long	__get_free_page (int priority)
unsigned long	get_free_page (int priority)
void	free_page (unsigned long addr)
	memory.c
unsigned long	put_dirty_page (struct task_struct *tsk, unsigned long page, unsigned long address)
void	free_page_tables (struct task_struct *tsk)
void	clear_page_tables (struct task_struct *tsk)
int	copy_page_tables (struct task_struct *to)
int	clone_page_tables (struct task_struct *to)
int	unmap_page_range (unsigned long from, unsigned long size)
int	remap_page_range (unsigned long from, unsigned long to, unsigned long size, int mask)
int	zeromap_page_range (unsigned long from, unsigned long size, int mask)
void	do_wp_page (unsigned long error_code, unsigned long address, struct task_struct *tsk, unsigned long user_esp)
void	do_no_page (unsigned long error_code, unsigned long address, struct task_struct *tsk, unsigned long user_esp)
unsigned long	paging_init (unsigned long start_mem, unsigned long end_mem)
void	mem_init (unsigned long low_start_mem, unsigned long start_mem, unsigned long end_mem)
void	show_mem (void)
void	oom (struct task_struct *task)
void	si_meminfo (struct sysinfo *val)
void *	vmalloc (unsigned long size)
	vmalloc.c
void	vfree (void *addr)
int	vread (char *buf, char *addr, int count)
void	swap_free (unsigned long page_nr)
	swap.c
unsigned long	swap_duplicate (unsigned long page_nr)
void	swap_in (unsigned long *table_ptr)
void	si_swapinfo (struct sysinfo *val)
void	rw_swap_page (int rw, unsigned long nr, char *buf)
int	do_mmap (struct file *file, unsigned long addr, unsigned long len, unsigned long prot, unsigned long flags, unsigned long off)
	mmap.c
void	merge_segments (struct vm_area_struct *, map_mergep_fnp, void *)
void	insert_vm_struct (struct task_struct *, struct vm_area_struct *)
int	ignoff_mergep (const struct vm_area_struct *, const struct vm_area_struct *, void *)
int	do_munmap (unsigned long, size_t)
void	shm_no_page (ulong *)
Variables
volatile short	free_page_ptr
	used by malloc and tcp/ip.
int	nr_swap_pages
int	nr_free_pages
unsigned long	free_page_list
int	nr_secondary_pages
unsigned long	secondary_page_list
unsigned long	high_memory
unsigned short *	mem_map

---

Define Documentation

#define BAD_PAGE   __bad_page()

Definition at line 85 of file mm.h.

#define BAD_PAGETABLE   __bad_pagetable()

Definition at line 84 of file mm.h.

#define GFP_ATOMIC   0x01

Definition at line 204 of file mm.h.

#define GFP_BUFFER   0x00

Definition at line 203 of file mm.h.

#define GFP_KERNEL   0x03

Definition at line 206 of file mm.h.

#define GFP_USER   0x02

Definition at line 205 of file mm.h.

 

#define invalidate

(

)

__asm__ __volatile__("movl %%cr3,%%eax\n\tmovl %%eax,%%cr3": : :"ax")

Definition at line 178 of file mm.h.

#define MAP_NR

(

addr

)

((addr) >> PAGE_SHIFT)

Definition at line 183 of file mm.h.

#define MAP_PAGE_RESERVED   (1<<15)

Definition at line 184 of file mm.h.

#define MAX_SECONDARY_PAGES   20

Definition at line 96 of file mm.h.

#define PAGE_ACCESSED   0x020

Definition at line 193 of file mm.h.

#define PAGE_COPY   (PAGE_PRESENT | PAGE_USER | PAGE_ACCESSED | PAGE_COW)

Definition at line 199 of file mm.h.

#define PAGE_COW   0x200

implemented in software (one of the AVL bits)

Definition at line 195 of file mm.h.

#define PAGE_DIRTY   0x040

Definition at line 194 of file mm.h.

#define PAGE_PCD   0x010

486 only - not used currently

Definition at line 192 of file mm.h.

#define PAGE_PRESENT   0x001

Definition at line 188 of file mm.h.

#define PAGE_PRIVATE   (PAGE_PRESENT | PAGE_RW | PAGE_USER | PAGE_ACCESSED | PAGE_COW)

Definition at line 197 of file mm.h.

#define PAGE_PWT   0x008

486 only - not used currently

Definition at line 191 of file mm.h.

#define PAGE_READONLY   (PAGE_PRESENT | PAGE_USER | PAGE_ACCESSED)

Definition at line 200 of file mm.h.

#define PAGE_RW   0x002

Definition at line 189 of file mm.h.

#define PAGE_SHARED   (PAGE_PRESENT | PAGE_RW | PAGE_USER | PAGE_ACCESSED)

Definition at line 198 of file mm.h.

#define PAGE_TABLE   (PAGE_PRESENT | PAGE_RW | PAGE_USER | PAGE_ACCESSED)

Definition at line 201 of file mm.h.

#define PAGE_USER   0x004

Definition at line 190 of file mm.h.

#define read_swap_page	(	nr,
		buf		)	rw_swap_page(READ,(nr),(buf))

Definition at line 173 of file mm.h.

#define SHM_SWP_TYPE   0x41

vm_ops not present page codes

Definition at line 210 of file mm.h.

#define VERIFY_READ   0

Definition at line 9 of file mm.h.

Referenced by verify_area().

#define VERIFY_WRITE   1

Definition at line 10 of file mm.h.

#define write_swap_page	(	nr,
		buf		)	rw_swap_page(WRITE,(nr),(buf))

Definition at line 175 of file mm.h.

#define ZERO_PAGE   __zero_page()

Definition at line 86 of file mm.h.

---

Typedef Documentation

typedef int(*) map_mergep_fnp(const struct vm_area_struct *, const struct vm_area_struct *, void *)

Definition at line 165 of file mm.h.

---

Function Documentation

unsigned long __bad_page

(

void

)

unsigned long __bad_pagetable

(

void

)

unsigned long __get_free_page

(

int

priority

)

This is timing-critical - most of the time in getting a new page goes to clearing the page. If you want a page without the clearing overhead, just use __get_free_page() directly..

Referenced by get_free_page().

int __verify_write	(	unsigned long	addr,
		unsigned long	count
	)

Referenced by verify_area().

unsigned long __zero_page

(

void

)

void clear_page_tables

(

struct task_struct *

tsk

)

int clone_page_tables

(

struct task_struct *

to

)

int copy_page_tables

(

struct task_struct *

to

)

int do_mmap	(	struct file *	file,
		unsigned long	addr,
		unsigned long	len,
		unsigned long	prot,
		unsigned long	flags,
		unsigned long	off
	)

mmap.c

int do_munmap	(	unsigned	long,
		size_t
	)

void do_no_page	(	unsigned long	error_code,
		unsigned long	address,
		struct task_struct *	tsk,
		unsigned long	user_esp
	)

void do_wp_page	(	unsigned long	error_code,
		unsigned long	address,
		struct task_struct *	tsk,
		unsigned long	user_esp
	)

void free_page

(

unsigned long

addr

)

memory.c

void free_page_tables

(

struct task_struct *

tsk

)

unsigned long get_free_page

(

int

priority

)

[inline]

Definition at line 108 of file mm.h.

References __get_free_page().

int ignoff_mergep	(	const struct vm_area_struct *	,
		const struct vm_area_struct *	,
		void *
	)

void insert_vm_struct	(	struct task_struct *	,
		struct vm_area_struct *
	)

void mem_init	(	unsigned long	low_start_mem,
		unsigned long	start_mem,
		unsigned long	end_mem
	)

void merge_segments	(	struct vm_area_struct *	,
		map_mergep_fnp	,
		void *
	)

void oom

(

struct task_struct *

task

)

unsigned long paging_init	(	unsigned long	start_mem,
		unsigned long	end_mem
	)

unsigned long put_dirty_page	(	struct task_struct *	tsk,
		unsigned long	page,
		unsigned long	address
	)

int remap_page_range	(	unsigned long	from,
		unsigned long	to,
		unsigned long	size,
		int	mask
	)

void rw_swap_page	(	int	rw,
		unsigned long	nr,
		char *	buf
	)

void shm_no_page

(

ulong *

)

void show_mem

(

void

)

void si_meminfo

(

struct sysinfo *

val

)

void si_swapinfo

(

struct sysinfo *

val

)

unsigned long swap_duplicate

(

unsigned long

page_nr

)

void swap_free

(

unsigned long

page_nr

)

swap.c

void swap_in

(

unsigned long *

table_ptr

)

int unmap_page_range	(	unsigned long	from,
		unsigned long	size
	)

int verify_area	(	int	type,
		const void *	addr,
		unsigned long	size
	)			[inline]

Definition at line 14 of file mm.h.

References __verify_write(), EFAULT, TASK_SIZE, VERIFY_READ, and wp_works_ok.

void vfree

(

void *

addr

)

void* vmalloc

(

unsigned long

size

)

vmalloc.c

int vread	(	char *	buf,
		char *	addr,
		int	count
	)

int zeromap_page_range	(	unsigned long	from,
		unsigned long	size,
		int	mask
	)

---

Variable Documentation

unsigned long free_page_list

volatile short free_page_ptr

used by malloc and tcp/ip.

unsigned long high_memory

unsigned short* mem_map

int nr_free_pages

int nr_secondary_pages

int nr_swap_pages

unsigned long secondary_page_list

---