swmcstcnttb.c

来自「vt6528芯片交换机API函数和文档运行程序」· C语言 代码 · 共 75 行

/*
 * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
 * All rights reserved.
 *
 * This software is copyrighted by and is the sole property of
 * VIA Networking Technologies, Inc. This software may only be used
 * in accordance with the corresponding license agreement. Any unauthorized
 * use, duplication, transmission, distribution, or disclosure of this
 * software is expressly forbidden.
 *
 * This software is provided by VIA Networking Technologies, Inc. "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 VIA Networking Technologies, Inc.
 * be liable for any direct, indirect, incidental, special, exemplary, or
 * consequential damages.
 *
 *
 * File:    swmcstcnttb.c
 *
 * Purpose: Multicast count table operation functions
 *
 * Author:  Henry Lin
 *
 * Date:    Apr 07, 2005
 *
 * Functions:
 *
 * Revision History:
 *
 */


#if !defined(__SWITCH_H__)
#include "switch.h"
#endif
#if !defined(__SWSRAM_H__)
#include "swsram.h"
#endif




/*---------------------  Static Definitions  ------------------------*/

/*---------------------  Static Types  ------------------------------*/

/*---------------------  Static Macros  -----------------------------*/
#define MCSTCNT_INDEX_TO_SA(indx)      (SRAM_MCAST_CNTR_TBL_BASE_ADDR +  (indx<<SHIFT_NUM_SIZE_4Byte))

/*---------------------  Static Classes  ----------------------------*/

/*---------------------  Static Variables  --------------------------*/

/*---------------------  Static Functions  --------------------------*/

/*---------------------  Export Variables  --------------------------*/

BOOL SWMCSTCNTTB_bIsEntryEmpty (UINT16 u16Indx)
{
    UINT8   au8EntryBuf[SRAM_ENTRY_SIZE_4Byte];
    UINT32 u32Addr;

    
    u32Addr = MCSTCNT_INDEX_TO_SA(u16Indx);
    // read memory entry
    SWSRAM_bReadEntry(u32Addr, au8EntryBuf);
    
    // Check if bit-0-4 is not 0
    if (!((au8EntryBuf[0] & 0x1F) == 0))
        return FALSE;
    return TRUE;    
}