/********************************************************************************     Author: Xilinx, Inc.***     This program is free software; you can redistribute it and/or modify it*     under the terms of the GNU General Public License as published by the*     Free Software Foundation; either version 2 of the License, or (at your*     option) any later version.***     XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS" AS A*     COURTESY TO YOU. BY PROVIDING THIS DESIGN, CODE, OR INFORMATION AS*     ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE, APPLICATION OR STANDARD,*     XILINX IS MAKING NO REPRESENTATION THAT THIS IMPLEMENTATION IS FREE*     FROM ANY CLAIMS OF INFRINGEMENT, AND YOU ARE RESPONSIBLE FOR OBTAINING*     ANY THIRD PARTY RIGHTS YOU MAY REQUIRE FOR YOUR IMPLEMENTATION.*     XILINX EXPRESSLY DISCLAIMS ANY WARRANTY WHATSOEVER WITH RESPECT TO*     THE ADEQUACY OF THE IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY*     WARRANTIES OR REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM*     CLAIMS OF INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND*     FITNESS FOR A PARTICULAR PURPOSE.***     Xilinx hardware products are not intended for use in life support*     appliances, devices, or systems. Use in such applications is*     expressly prohibited.***     (c) Copyright 2002-2004 Xilinx Inc.*     All rights reserved.***     You should have received a copy of the GNU General Public License along*     with this program; if not, write to the Free Software Foundation, Inc.,*     675 Mass Ave, Cambridge, MA 02139, USA.*******************************************************************************/#include <common.h>#include <net.h>#include "xparameters.h"#include "xemac.h"#if defined(XPAR_EMAC_0_DEVICE_ID)/* * ENET_MAX_MTU and ENET_MAX_MTU_ALIGNED are set from * PKTSIZE and PKTSIZE_ALIGN (include/net.h) */#define ENET_MAX_MTU           PKTSIZE#define ENET_MAX_MTU_ALIGNED   PKTSIZE_ALIGN#define ENET_ADDR_LENGTH       6static XEmac Emac;static char etherrxbuff[PKTSIZE_ALIGN];	/* Receive buffer *//* hardcoded MAC address for the Xilinx EMAC Core when env is nowhere*/#ifdef CFG_ENV_IS_NOWHEREstatic u8 EMACAddr[ENET_ADDR_LENGTH] = { 0x00, 0x0a, 0x35, 0x00, 0x22, 0x01 };#endifstatic int initialized = 0;voideth_halt(void){	if (initialized)		(void) XEmac_Stop(&Emac);}inteth_init(bd_t * bis){	u32 Options;	XStatus Result;#ifdef DEBUG	printf("EMAC Initialization Started\n\r");#endif	Result = XEmac_Initialize(&Emac, XPAR_EMAC_0_DEVICE_ID);	if (Result != XST_SUCCESS) {		return 0;	}	/* make sure the Emac is stopped before it is started */	(void) XEmac_Stop(&Emac);#ifdef CFG_ENV_IS_NOWHERE	memcpy(bis->bi_enetaddr, EMACAddr, 6);#endif	Result = XEmac_SetMacAddress(&Emac, bis->bi_enetaddr);	if (Result != XST_SUCCESS) {		return 0;	}	Options =	    (XEM_POLLED_OPTION | XEM_UNICAST_OPTION | XEM_BROADCAST_OPTION |	     XEM_FDUPLEX_OPTION | XEM_INSERT_FCS_OPTION |	     XEM_INSERT_PAD_OPTION);	Result = XEmac_SetOptions(&Emac, Options);	if (Result != XST_SUCCESS) {		return 0;	}	Result = XEmac_Start(&Emac);	if (Result != XST_SUCCESS) {		return 0;	}#ifdef DEBUG	printf("EMAC Initialization complete\n\r");#endif	initialized = 1;	return (0);}/*-----------------------------------------------------------------------------++-----------------------------------------------------------------------------*/inteth_send(volatile void *ptr, int len){	XStatus Result;	if (len > ENET_MAX_MTU)		len = ENET_MAX_MTU;	Result = XEmac_PollSend(&Emac, (u8 *) ptr, len);	if (Result == XST_SUCCESS) {		return (1);	} else {		printf("Error while sending frame\n\r");		return (0);	}}inteth_rx(void){	u32 RecvFrameLength;	XStatus Result;	RecvFrameLength = PKTSIZE;	Result = XEmac_PollRecv(&Emac, (u8 *) etherrxbuff, &RecvFrameLength);	if (Result == XST_SUCCESS) {		NetReceive((uchar *)etherrxbuff, RecvFrameLength);		return (1);	} else {		return (0);	}}#endif