2 * LiMon Monitor (LiMon) - Network.
4 * Copyright 1994 - 2000 Neil Russell.
9 * 9/16/00 bor adapted to TQM823L/STK8xxL board, RARP/TFTP boot added
15 #if !defined(CONFIG_NET_MULTI) && defined(CONFIG_8xx)
17 #if defined(FEC_ENET) || defined(SCC_ENET)
18 #define CONFIG_NET_MULTI
21 #include <asm/byteorder.h> /* for nton* / ntoh* stuff */
25 * The number of receive packet buffers, and the required packet buffer
26 * alignment in memory.
30 #ifndef CONFIG_EEPRO100
38 typedef ulong IPaddr_t;
43 * The current receive packet handler. Called with a pointer to the
44 * application packet, and a protocol type (PORT_BOOTPC or PORT_TFTP).
45 * All other packets are dealt with without calling the handler.
47 typedef void rxhand_f(uchar *, unsigned, unsigned, unsigned);
50 * A timeout handler. Called after time interval has expired.
52 typedef void thand_f(void);
54 #ifdef CONFIG_NET_MULTI
66 unsigned char enetaddr[6];
70 int (*init) (struct eth_device*, bd_t*);
71 int (*send) (struct eth_device*, volatile void* pachet, int length);
72 int (*recv) (struct eth_device*);
73 void (*halt) (struct eth_device*);
75 struct eth_device *next;
79 extern int eth_initialize(bd_t *bis); /* Initialize network subsystem */
80 extern int eth_register(struct eth_device* dev);/* Register network device */
81 extern void eth_try_another(int first_restart); /* Change the device */
82 extern struct eth_device *eth_get_dev(void); /* get the current device MAC */
83 extern void eth_set_enetaddr(int num, char* a); /* Set new MAC address */
86 extern int eth_init(bd_t *bis); /* Initialize the device */
87 extern int eth_send(volatile void *packet, int length); /* Send a packet */
88 extern int eth_rx(void); /* Check for received packets */
89 extern void eth_halt(void); /* stop SCC */
92 /**********************************************************************/
101 uchar et_dest[6]; /* Destination node */
102 uchar et_src[6]; /* Source node */
103 ushort et_protlen; /* Protocol or length */
104 uchar et_dsap; /* 802 DSAP */
105 uchar et_ssap; /* 802 SSAP */
106 uchar et_ctl; /* 802 control */
107 uchar et_snap1; /* SNAP */
110 ushort et_prot; /* 802 protocol */
113 #define ETHER_HDR_SIZE 14 /* Ethernet header size */
114 #define E802_HDR_SIZE 22 /* 802 ethernet header size */
115 #define PROT_IP 0x0800 /* IP protocol */
116 #define PROT_ARP 0x0806 /* IP ARP protocol */
117 #define PROT_RARP 0x8035 /* IP ARP protocol */
119 #define IPPROTO_ICMP 1 /* Internet Control Message Protocol */
120 #define IPPROTO_UDP 17 /* User Datagram Protocol */
123 * Internet Protocol (IP) header.
126 uchar ip_hl_v; /* header length and version */
127 uchar ip_tos; /* type of service */
128 ushort ip_len; /* total length */
129 ushort ip_id; /* identification */
130 ushort ip_off; /* fragment offset field */
131 uchar ip_ttl; /* time to live */
132 uchar ip_p; /* protocol */
133 ushort ip_sum; /* checksum */
134 IPaddr_t ip_src; /* Source IP address */
135 IPaddr_t ip_dst; /* Destination IP address */
136 ushort udp_src; /* UDP source port */
137 ushort udp_dst; /* UDP destination port */
138 ushort udp_len; /* Length of UDP packet */
139 ushort udp_xsum; /* Checksum */
142 #define IP_HDR_SIZE_NO_UDP (sizeof (IP_t) - 8)
143 #define IP_HDR_SIZE (sizeof (IP_t))
147 * Address Resolution Protocol (ARP) header.
151 ushort ar_hrd; /* Format of hardware address */
152 # define ARP_ETHER 1 /* Ethernet hardware address */
153 ushort ar_pro; /* Format of protocol address */
154 uchar ar_hln; /* Length of hardware address */
155 uchar ar_pln; /* Length of protocol address */
156 ushort ar_op; /* Operation */
157 # define ARPOP_REQUEST 1 /* Request to resolve address */
158 # define ARPOP_REPLY 2 /* Response to previous request */
160 # define RARPOP_REQUEST 3 /* Request to resolve address */
161 # define RARPOP_REPLY 4 /* Response to previous request */
164 * The remaining fields are variable in size, according to
165 * the sizes above, and are defined as appropriate for
166 * specific hardware/protocol combinations.
170 uchar ar_sha[]; /* Sender hardware address */
171 uchar ar_spa[]; /* Sender protocol address */
172 uchar ar_tha[]; /* Target hardware address */
173 uchar ar_tpa[]; /* Target protocol address */
177 #define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */
180 * ICMP stuff (just enough to handle (host) redirect messages)
182 #define ICMP_REDIRECT 5 /* Redirect (change route) */
184 /* Codes for REDIRECT. */
185 #define ICMP_REDIR_NET 0 /* Redirect Net */
186 #define ICMP_REDIR_HOST 1 /* Redirect Host */
188 typedef struct icmphdr {
208 * Maximum packet size; used to allocate packet storage.
209 * TFTP packets can be 524 bytes + IP header + ethernet header.
210 * Lets be conservative, and go for 38 * 16. (Must also be
211 * a multiple of 32 bytes).
214 * AS.HARNOIS : Better to set PKTSIZE to maximum size because
215 * traffic type is not always controlled
216 * maximum packet size = 1518
217 * maximum packet size and multiple of 32 bytes = 1536
220 #define PKTSIZE_ALIGN 1536
221 /*#define PKTSIZE 608*/
224 * Maximum receive ring size; that is, the number of packets
225 * we can buffer before overflow happens. Basically, this just
226 * needs to be enough to prevent a packet being discarded while
227 * we are processing the previous one.
230 #define RINGSZ_LOG2 2
232 /**********************************************************************/
238 * All variables of type IPaddr_t are stored in NETWORK byte order
243 /** BOOTP EXTENTIONS **/
244 extern IPaddr_t NetOurGatewayIP; /* Our gateway IP addresse */
245 extern IPaddr_t NetOurSubnetMask; /* Our subnet mask (0 = unknown)*/
246 extern IPaddr_t NetOurDNSIP; /* Our Domain Name Server (0 = unknown)*/
247 extern char NetOurNISDomain[32]; /* Our NIS domain */
248 extern char NetOurHostName[32]; /* Our hostname */
249 extern char NetOurRootPath[64]; /* Our root path */
250 extern ushort NetBootFileSize; /* Our boot file size in blocks */
251 /** END OF BOOTP EXTENTIONS **/
252 extern ulong NetBootFileXferSize; /* size of bootfile in bytes */
253 extern uchar NetOurEther[6]; /* Our ethernet address */
254 extern uchar NetServerEther[6]; /* Boot server enet address */
255 extern IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */
256 extern IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */
257 extern volatile uchar * NetTxPacket; /* THE transmit packet */
258 extern volatile uchar * NetRxPackets[PKTBUFSRX];/* Receive packets */
259 extern volatile uchar * NetRxPkt; /* Current receive packet */
260 extern int NetRxPktLen; /* Current rx packet length */
261 extern unsigned NetIPID; /* IP ID (counting) */
262 extern uchar NetBcastAddr[6]; /* Ethernet boardcast address */
264 extern int NetState; /* Network loop state */
265 #define NETLOOP_CONTINUE 1
266 #define NETLOOP_RESTART 2
267 #define NETLOOP_SUCCESS 3
268 #define NETLOOP_FAIL 4
270 #ifdef CONFIG_NET_MULTI
271 extern int NetRestartWrap; /* Tried all network devices */
274 typedef enum { BOOTP, RARP, ARP, TFTP, DHCP } proto_t;
277 extern char BootFile[128]; /* Boot File name */
279 /* Initialize the network adapter */
280 extern int NetLoop(proto_t);
282 /* Shutdown adapters and cleanup */
283 extern void NetStop(void);
285 /* Load failed. Start again. */
286 extern void NetStartAgain(void);
288 /* Set ethernet header */
289 extern void NetSetEther(volatile uchar *, uchar *, uint);
292 extern void NetSetIP(volatile uchar *, IPaddr_t, int, int, int);
295 extern int NetCksumOk(uchar *, int); /* Return true if cksum OK */
296 extern uint NetCksum(uchar *, int); /* Calculate the checksum */
299 extern void NetSetHandler(rxhand_f *); /* Set RX packet handler */
300 extern void NetSetTimeout(int, thand_f *); /* Set timeout handler */
302 /* Transmit "NetTxPacket" */
303 extern void NetSendPacket(volatile uchar *, int);
305 /* Processes a received packet */
306 extern void NetReceive(volatile uchar *, int);
308 /* Print an IP address on the console */
309 extern void print_IPaddr (IPaddr_t);
312 * The following functions are a bit ugly, but necessary to deal with
313 * alignment restrictions on ARM.
315 * We're using inline functions, which had the smallest memory
316 * footprint in our tests.
318 /* return IP *in network byteorder* */
319 static inline IPaddr_t NetReadIP(void *from)
322 memcpy((void*)&ip, from, sizeof(ip));
326 /* return ulong *in network byteorder* */
327 static inline ulong NetReadLong(ulong *from)
330 memcpy((void*)&l, (void*)from, sizeof(l));
334 /* write IP *in network byteorder* */
335 static inline void NetWriteIP(void *to, IPaddr_t ip)
337 memcpy(to, (void*)&ip, sizeof(ip));
341 static inline void NetCopyIP(void *to, void *from)
343 memcpy(to, from, sizeof(IPaddr_t));
347 static inline void NetCopyLong(ulong *to, ulong *from)
349 memcpy((void*)to, (void*)from, sizeof(ulong));
352 /* Convert an IP address to a string */
353 extern void ip_to_string (IPaddr_t x, char *s);
355 /* read an IP address from a environment variable */
356 extern IPaddr_t getenv_IPaddr (char *);
358 /* copy a filename (allow for "..." notation, limit length) */
359 extern void copy_filename (uchar *dst, uchar *src, int size);
361 /**********************************************************************/
363 #endif /* __NET_H__ */