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
22 #if !defined(CONFIG_NET_MULTI) && defined(CONFIG_8260)
24 #if defined(CONFIG_ETHER_ON_FCC)
25 #if defined(CONFIG_ETHER_ON_SCC)
26 #error "Ethernet not correctly defined"
27 #endif /* CONFIG_ETHER_ON_SCC */
28 #define CONFIG_NET_MULTI
29 #if (CONFIG_ETHER_INDEX == 1)
30 #define CONFIG_ETHER_ON_FCC1
31 # define CFG_CMXFCR_MASK1 CFG_CMXFCR_MASK
32 # define CFG_CMXFCR_VALUE1 CFG_CMXFCR_VALUE
33 #elif (CONFIG_ETHER_INDEX == 2)
34 #define CONFIG_ETHER_ON_FCC2
35 # define CFG_CMXFCR_MASK2 CFG_CMXFCR_MASK
36 # define CFG_CMXFCR_VALUE2 CFG_CMXFCR_VALUE
37 #elif (CONFIG_ETHER_INDEX == 3)
38 #define CONFIG_ETHER_ON_FCC3
39 # define CFG_CMXFCR_MASK3 CFG_CMXFCR_MASK
40 # define CFG_CMXFCR_VALUE3 CFG_CMXFCR_VALUE
41 #endif /* CONFIG_ETHER_INDEX */
42 #endif /* CONFIG_ETHER_ON_FCC */
43 #endif /* !CONFIG_NET_MULTI && CONFIG_8260 */
45 #include <asm/byteorder.h> /* for nton* / ntoh* stuff */
49 * The number of receive packet buffers, and the required packet buffer
50 * alignment in memory.
54 #ifdef CFG_RX_ETH_BUFFER
55 # define PKTBUFSRX CFG_RX_ETH_BUFFER
62 typedef ulong IPaddr_t;
67 * The current receive packet handler. Called with a pointer to the
68 * application packet, and a protocol type (PORT_BOOTPC or PORT_TFTP).
69 * All other packets are dealt with without calling the handler.
71 typedef void rxhand_f(uchar *, unsigned, unsigned, unsigned);
74 * A timeout handler. Called after time interval has expired.
76 typedef void thand_f(void);
88 unsigned char enetaddr[6];
92 int (*init) (struct eth_device*, bd_t*);
93 int (*send) (struct eth_device*, volatile void* pachet, int length);
94 int (*recv) (struct eth_device*);
95 void (*halt) (struct eth_device*);
97 struct eth_device *next;
101 extern int eth_initialize(bd_t *bis); /* Initialize network subsystem */
102 extern int eth_register(struct eth_device* dev);/* Register network device */
103 extern void eth_try_another(int first_restart); /* Change the device */
104 extern struct eth_device *eth_get_dev(void); /* get the current device MAC */
105 extern void eth_set_enetaddr(int num, char* a); /* Set new MAC address */
107 extern int eth_init(bd_t *bis); /* Initialize the device */
108 extern int eth_send(volatile void *packet, int length); /* Send a packet */
109 extern int eth_rx(void); /* Check for received packets */
110 extern void eth_halt(void); /* stop SCC */
113 /**********************************************************************/
122 uchar et_dest[6]; /* Destination node */
123 uchar et_src[6]; /* Source node */
124 ushort et_protlen; /* Protocol or length */
125 uchar et_dsap; /* 802 DSAP */
126 uchar et_ssap; /* 802 SSAP */
127 uchar et_ctl; /* 802 control */
128 uchar et_snap1; /* SNAP */
131 ushort et_prot; /* 802 protocol */
134 #define ETHER_HDR_SIZE 14 /* Ethernet header size */
135 #define E802_HDR_SIZE 22 /* 802 ethernet header size */
136 #define PROT_IP 0x0800 /* IP protocol */
137 #define PROT_ARP 0x0806 /* IP ARP protocol */
138 #define PROT_RARP 0x8035 /* IP ARP protocol */
140 #define IPPROTO_ICMP 1 /* Internet Control Message Protocol */
141 #define IPPROTO_UDP 17 /* User Datagram Protocol */
144 * Internet Protocol (IP) header.
147 uchar ip_hl_v; /* header length and version */
148 uchar ip_tos; /* type of service */
149 ushort ip_len; /* total length */
150 ushort ip_id; /* identification */
151 ushort ip_off; /* fragment offset field */
152 uchar ip_ttl; /* time to live */
153 uchar ip_p; /* protocol */
154 ushort ip_sum; /* checksum */
155 IPaddr_t ip_src; /* Source IP address */
156 IPaddr_t ip_dst; /* Destination IP address */
157 ushort udp_src; /* UDP source port */
158 ushort udp_dst; /* UDP destination port */
159 ushort udp_len; /* Length of UDP packet */
160 ushort udp_xsum; /* Checksum */
163 #define IP_HDR_SIZE_NO_UDP (sizeof (IP_t) - 8)
164 #define IP_HDR_SIZE (sizeof (IP_t))
168 * Address Resolution Protocol (ARP) header.
172 ushort ar_hrd; /* Format of hardware address */
173 # define ARP_ETHER 1 /* Ethernet hardware address */
174 ushort ar_pro; /* Format of protocol address */
175 uchar ar_hln; /* Length of hardware address */
176 uchar ar_pln; /* Length of protocol address */
177 ushort ar_op; /* Operation */
178 # define ARPOP_REQUEST 1 /* Request to resolve address */
179 # define ARPOP_REPLY 2 /* Response to previous request */
181 # define RARPOP_REQUEST 3 /* Request to resolve address */
182 # define RARPOP_REPLY 4 /* Response to previous request */
185 * The remaining fields are variable in size, according to
186 * the sizes above, and are defined as appropriate for
187 * specific hardware/protocol combinations.
191 uchar ar_sha[]; /* Sender hardware address */
192 uchar ar_spa[]; /* Sender protocol address */
193 uchar ar_tha[]; /* Target hardware address */
194 uchar ar_tpa[]; /* Target protocol address */
198 #define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */
201 * ICMP stuff (just enough to handle (host) redirect messages)
203 #define ICMP_REDIRECT 5 /* Redirect (change route) */
205 /* Codes for REDIRECT. */
206 #define ICMP_REDIR_NET 0 /* Redirect Net */
207 #define ICMP_REDIR_HOST 1 /* Redirect Host */
209 typedef struct icmphdr {
229 * Maximum packet size; used to allocate packet storage.
230 * TFTP packets can be 524 bytes + IP header + ethernet header.
231 * Lets be conservative, and go for 38 * 16. (Must also be
232 * a multiple of 32 bytes).
235 * AS.HARNOIS : Better to set PKTSIZE to maximum size because
236 * traffic type is not always controlled
237 * maximum packet size = 1518
238 * maximum packet size and multiple of 32 bytes = 1536
241 #define PKTSIZE_ALIGN 1536
242 /*#define PKTSIZE 608*/
245 * Maximum receive ring size; that is, the number of packets
246 * we can buffer before overflow happens. Basically, this just
247 * needs to be enough to prevent a packet being discarded while
248 * we are processing the previous one.
251 #define RINGSZ_LOG2 2
253 /**********************************************************************/
259 * All variables of type IPaddr_t are stored in NETWORK byte order
264 /** BOOTP EXTENTIONS **/
265 extern IPaddr_t NetOurGatewayIP; /* Our gateway IP addresse */
266 extern IPaddr_t NetOurSubnetMask; /* Our subnet mask (0 = unknown)*/
267 extern IPaddr_t NetOurDNSIP; /* Our Domain Name Server (0 = unknown)*/
268 extern char NetOurNISDomain[32]; /* Our NIS domain */
269 extern char NetOurHostName[32]; /* Our hostname */
270 extern char NetOurRootPath[64]; /* Our root path */
271 extern ushort NetBootFileSize; /* Our boot file size in blocks */
272 /** END OF BOOTP EXTENTIONS **/
273 extern ulong NetBootFileXferSize; /* size of bootfile in bytes */
274 extern uchar NetOurEther[6]; /* Our ethernet address */
275 extern uchar NetServerEther[6]; /* Boot server enet address */
276 extern IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */
277 extern IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */
278 extern volatile uchar * NetTxPacket; /* THE transmit packet */
279 extern volatile uchar * NetRxPackets[PKTBUFSRX];/* Receive packets */
280 extern volatile uchar * NetRxPkt; /* Current receive packet */
281 extern int NetRxPktLen; /* Current rx packet length */
282 extern unsigned NetIPID; /* IP ID (counting) */
283 extern uchar NetBcastAddr[6]; /* Ethernet boardcast address */
285 extern int NetState; /* Network loop state */
286 #define NETLOOP_CONTINUE 1
287 #define NETLOOP_RESTART 2
288 #define NETLOOP_SUCCESS 3
289 #define NETLOOP_FAIL 4
291 #ifdef CONFIG_NET_MULTI
292 extern int NetRestartWrap; /* Tried all network devices */
295 typedef enum { BOOTP, RARP, ARP, TFTP, DHCP } proto_t;
298 extern char BootFile[128]; /* Boot File name */
300 /* Initialize the network adapter */
301 extern int NetLoop(proto_t);
303 /* Shutdown adapters and cleanup */
304 extern void NetStop(void);
306 /* Load failed. Start again. */
307 extern void NetStartAgain(void);
309 /* Set ethernet header */
310 extern void NetSetEther(volatile uchar *, uchar *, uint);
313 extern void NetSetIP(volatile uchar *, IPaddr_t, int, int, int);
316 extern int NetCksumOk(uchar *, int); /* Return true if cksum OK */
317 extern uint NetCksum(uchar *, int); /* Calculate the checksum */
320 extern void NetSetHandler(rxhand_f *); /* Set RX packet handler */
321 extern void NetSetTimeout(int, thand_f *); /* Set timeout handler */
323 /* Transmit "NetTxPacket" */
324 extern void NetSendPacket(volatile uchar *, int);
326 /* Processes a received packet */
327 extern void NetReceive(volatile uchar *, int);
329 /* Print an IP address on the console */
330 extern void print_IPaddr (IPaddr_t);
333 * The following functions are a bit ugly, but necessary to deal with
334 * alignment restrictions on ARM.
336 * We're using inline functions, which had the smallest memory
337 * footprint in our tests.
339 /* return IP *in network byteorder* */
340 static inline IPaddr_t NetReadIP(void *from)
343 memcpy((void*)&ip, from, sizeof(ip));
347 /* return ulong *in network byteorder* */
348 static inline ulong NetReadLong(ulong *from)
351 memcpy((void*)&l, (void*)from, sizeof(l));
355 /* write IP *in network byteorder* */
356 static inline void NetWriteIP(void *to, IPaddr_t ip)
358 memcpy(to, (void*)&ip, sizeof(ip));
362 static inline void NetCopyIP(void *to, void *from)
364 memcpy(to, from, sizeof(IPaddr_t));
368 static inline void NetCopyLong(ulong *to, ulong *from)
370 memcpy((void*)to, (void*)from, sizeof(ulong));
373 /* Convert an IP address to a string */
374 extern void ip_to_string (IPaddr_t x, char *s);
376 /* read an IP address from a environment variable */
377 extern IPaddr_t getenv_IPaddr (char *);
379 /* copy a filename (allow for "..." notation, limit length) */
380 extern void copy_filename (uchar *dst, uchar *src, int size);
382 /**********************************************************************/
384 #endif /* __NET_H__ */