memalloc.h

来自「linux2.6.18下支持sd2.0的驱动程序源码,支持最大32G的SD卡」· C头文件 代码 · 共 77 行

/*------------------------------------------------------------------------------
--                                                                            --
--       This software is confidential and proprietary and may be used        --
--        only as expressly authorized by a licensing agreement from          --
--                                                                            --
--                            Hantro Products Oy.                             --
--                                                                            --
--      In the event of publication, the following notice is applicable:      --
--                                                                            --
--                   (C) COPYRIGHT 2002 HANTRO PRODUCTS OY                    --
--                            ALL RIGHTS RESERVED                             --
--                                                                            --
--          The entire notice above must be reproduced on all copies.         --
--                                                                            --
--------------------------------------------------------------------------------
--
--  Project  : Penguin
--
--  Abstract : Encoder device driver (kernel module) interface
--
--------------------------------------------------------------------------------
--
--  Version control information, please leave untouched.
--
--  $RCSfile$
--  $Author: root $
--  $Date: 2006-03-15 11:58:36 +0800 (Wed, 15 Mar 2006) $
--  $Revision: 2 $
--  $Name$
--
------------------------------------------------------------------------------*/
     
    
#ifndef _HMP4ENC_H_
#define _HMP4ENC_H_
#include <linux/ioctl.h>    /* needed for the _IOW etc stuff used later */
/*
 * Macros to help debugging
 */
#undef PDEBUG   /* undef it, just in case */
#ifdef MEMALLOC_DEBUG
#  ifdef __KERNEL__
    /* This one if debugging is on, and kernel space */
#    define PDEBUG(fmt, args...) printk( KERN_INFO "memalloc: " fmt, ## args)
#  else
    /* This one for user space */
#    define PDEBUG(fmt, args...) fprintf(stderr, fmt, ## args)
#  endif
#else
#  define PDEBUG(fmt, args...)  /* not debugging: nothing */
#endif

/*
 * Ioctl definitions
 */
/* Use 'k' as magic number */
#define MEMALLOC_IOC_MAGIC  'k'
/*
 * S means "Set" through a ptr,
 * T means "Tell" directly with the argument value
 * G means "Get": reply by setting through a pointer
 * Q means "Query": response is on the return value
 * X means "eXchange": G and S atomically
 * H means "sHift": T and Q atomically
 */
#define MEMALLOC_IOCXGETBUFFER         _IOWR(MEMALLOC_IOC_MAGIC,  1, unsigned long)
#define MEMALLOC_IOCSFREEBUFFER        _IOW(MEMALLOC_IOC_MAGIC,  2, unsigned long)

/* ... more to come */
#define MEMALLOC_IOCHARDRESET       _IO(MEMALLOC_IOC_MAGIC, 15) /* debugging tool */
#define MEMALLOC_IOC_MAXNR 15

#define mem_map_reserve(p)	set_bit(PG_reserved, &((p)->flags))
#define mem_map_unreserve(p)	clear_bit(PG_reserved, &((p)->flags))

#endif /* _HMP4ENC_H_ */