mman.h

嵌入式系统设计与实验教材二源码linux内核移植与编译

/*
 * BK Id: SCCS/s.mman.h 1.7 05/17/01 18:14:25 cort
 */
#ifndef __PPC_MMAN_H__
#define __PPC_MMAN_H__

#define PROT_READ	0x1		/* page can be read */
#define PROT_WRITE	0x2		/* page can be written */
#define PROT_EXEC	0x4		/* page can be executed */
#define PROT_NONE	0x0		/* page can not be accessed */

#define MAP_SHARED	0x01		/* Share changes */
#define MAP_PRIVATE	0x02		/* Changes are private */
#define MAP_TYPE	0x0f		/* Mask for type of mapping */
#define MAP_FIXED	0x10		/* Interpret addr exactly */
#define MAP_ANONYMOUS	0x20		/* don't use a file */
#define MAP_RENAME      MAP_ANONYMOUS   /* In SunOS terminology */
#define MAP_NORESERVE   0x40            /* don't reserve swap pages */
#define MAP_LOCKED	0x80

#define MAP_GROWSDOWN	0x0100		/* stack-like segment */
#define MAP_DENYWRITE	0x0800		/* ETXTBSY */
#define MAP_EXECUTABLE	0x1000		/* mark it as an executable */

#define MS_ASYNC	1		/* sync memory asynchronously */
#define MS_INVALIDATE	2		/* invalidate the caches */
#define MS_SYNC		4		/* synchronous memory sync */

#define MCL_CURRENT     0x2000          /* lock all currently mapped pages */
#define MCL_FUTURE      0x4000          /* lock all additions to address space */

#define MADV_NORMAL	0x0		/* default page-in behavior */
#define MADV_RANDOM	0x1		/* page-in minimum required */
#define MADV_SEQUENTIAL	0x2		/* read-ahead aggressively */
#define MADV_WILLNEED	0x3		/* pre-fault pages */
#define MADV_DONTNEED	0x4		/* discard these pages */

/* compatibility flags */
#define MAP_ANON	MAP_ANONYMOUS
#define MAP_FILE	0

#endif /* __PPC_MMAN_H__ */