network.h

自己写的一个基于kb9202开发板的bootloader

#define MAX_FRAME 0x600
#define LIST_LENGTH 0x8
#define TX_BUFFER_START 0x2000f000
#define RX_BUFFER_START 0x20010000

#define MATCH_LA1 (0x1<<26)
#define TYPE_ARP 0x0806
#define TYPE_IP  0x0800

#define SWAP16(x) ( ((x&0xff) << 8) | (x >> 8) )

typedef struct eth_header{
	unsigned char dstAddr[6];
	unsigned char srcAddr[6];
	unsigned short frameLen;
} eth_header;

typedef struct arp_packet{
	unsigned char  dstAddr[6];
	unsigned char  srcAddr[6];
	unsigned short frameLen;
	unsigned short hardware;       //type of network
	unsigned short protocol;       //type of protocol
	unsigned char  hlen;           //mac address length
	unsigned char  plen;           //ip length
	unsigned short operation;      //1:request, 2:reply
	unsigned char  sendHA[6];      //sender MAC
	unsigned char  sendIP[4];      //sender IP
	unsigned char  targetHA[6];    //target MAC
	unsigned char  targetIP[4];     //target IP
	char  stuff[18];      //stuff code
} arp_packet;

extern inline void emac_init(void);
extern void arp_request(void);
extern int  recv_packet(void);
extern void arp_test(void);