net.h

em86xx 完整启动程序,支持网络下载与串通下载

/*****************************************
 Copyright (c) 2002-2004
 Sigma Designs, Inc. All Rights Reserved
 Proprietary and Confidential
 *****************************************/

/* This file is part of the boot loader */

/*
 * net.h
 *
 * network layer
 *
 * first revision by Ho Lee 11/06/2002
 */

#ifndef __BOOT_LOADER_NET_H
#define __BOOT_LOADER_NET_H

struct ethhdr;
struct arprequest;
struct iphdr;
struct icmphdr;
struct udphdr;
struct bootphdr;
struct tftphdr;

struct sk_buff {
    unsigned char *data;    // pointer to packet data
    unsigned int len;       // size of packet
    unsigned int buflen;    // size of allocated buffer
    int valid;              // data is available (set by skb_put())
    int owned;              // owned by a process (set by skb_get())
    int timestamp;          // sequence number (set by skb_put() and verified by skb_get())
    struct sk_buff *next;   // next socket buffer with data

    // after packet parsing
    struct ethhdr *eth;
    unsigned char *ethdata;
    int ethdata_len;

    struct arprequest *arp;
    struct iphdr *ip;
    unsigned char *ipdata;
    int ipdata_len;

    struct icmphdr *icmp;
    struct udphdr *udp;
    unsigned char *udpdata;
    int udpdata_len;

    struct bootphdr *bootp;
    struct tftphdr *tftp;

	//
	struct net_device *dev;
};

enum { ETHIRQ_RX = 0x01, ETHIRQ_TX = 0x02 };
enum { NETDEV_NODEV, NETDEV_DOWN, NETDEV_UP };

#define MACADDR_LEN             6
#define	IFNAMSIZ	16

struct net_device {
    int state;
    void *priv;
    int (*init)(struct net_device *dev);
    int (*open)(struct net_device *dev);
    int (*close)(struct net_device *dev);
    int (*send_packet)(struct sk_buff *skbuff, struct net_device *dev, int async);
    int (*receive_packet)(struct net_device *dev);
    void (*print_status)(struct net_device *dev);
    unsigned char dev_addr[MACADDR_LEN];

    // EEPROM
    int eeprom_size;
    unsigned short (*eeprom_readw)(struct net_device *dev, int reg);
    void (*eeprom_writew)(struct net_device *dev, int reg, int data);

	//for em86xx_eth.h
	char			name[IFNAMSIZ];
	/*	I/O specific fields */
	unsigned long		rmem_end;	/* shmem "recv" end	*/
	unsigned long		rmem_start;	/* shmem "recv" start	*/
	unsigned long		mem_end;	/* shared mem end	*/
	unsigned long		mem_start;	/* shared mem start	*/
//	unsigned long		base_addr;	/* device I/O address	*/
	unsigned int		irq;		/* device IRQ number	*/

	unsigned char		dma;		/* DMA channel		*/

	struct net_device_stats* (*get_stats)(struct net_device *dev);

	unsigned long		trans_start;	/* Time (in jiffies) of last Tx	*/
	unsigned long		last_rx;	/* Time of last Rx	*/

	unsigned			mtu;	/* interface MTU value, Maximum Transmission Unit*/
	unsigned short		hard_header_len;	/* hardware hdr length	*/

	/* Interface address info. */
	unsigned char		broadcast[MACADDR_LEN];	/* hw bcast add	*/
	unsigned char		addr_len;	/* hardware address length	*/

#define HAVE_NETDEV_POLL
	int			(*poll) (struct net_device *dev, int *quota);

};

extern struct net_device g_netdev;

//
// function prototypes
//

int net_init(void);
int net_found(void);
int net_arp_setup(void);
int net_dev_up(void);
int net_dev_down(void);
struct sk_buff *net_getpacket(int timeout);
int net_sendpacket(struct sk_buff *skb, int async);
int net_defaultaction(struct sk_buff *skb);
void net_device_status(void);

struct sk_buff *skb_alloc(int len);
void skb_free(struct sk_buff *skb);
struct sk_buff *skb_dup(struct sk_buff *skb);
void skb_put(struct sk_buff *skb);
struct sk_buff *skb_get(void);

struct sk_buff *skb_alloc_tx(int len);

#endif