Initial revision
diff --git a/include/net.h b/include/net.h
new file mode 100644
index 0000000..d4985ca
--- /dev/null
+++ b/include/net.h
@@ -0,0 +1,358 @@
+/*
+ * LiMon Monitor (LiMon) - Network.
+ *
+ * Copyright 1994 - 2000 Neil Russell.
+ * (See License)
+ *
+ *
+ * History
+ * 9/16/00 bor adapted to TQM823L/STK8xxL board, RARP/TFTP boot added
+ */
+
+#ifndef __NET_H__
+#define __NET_H__
+
+#if !defined(CONFIG_NET_MULTI) && defined(CONFIG_8xx)
+#include <commproc.h>
+#if defined(FEC_ENET) || defined(SCC_ENET)
+#define CONFIG_NET_MULTI
+#endif
+#endif
+#include <asm/byteorder.h> /* for nton* / ntoh* stuff */
+
+
+/*
+ * The number of receive packet buffers, and the required packet buffer
+ * alignment in memory.
+ *
+ */
+
+#define PKTBUFSRX 4
+#define PKTALIGN 32
+
+typedef ulong IPaddr_t;
+
+
+
+/*
+ * The current receive packet handler. Called with a pointer to the
+ * application packet, and a protocol type (PORT_BOOTPC or PORT_TFTP).
+ * All other packets are dealt with without calling the handler.
+ */
+typedef void rxhand_f(uchar *, unsigned, unsigned, unsigned);
+
+/*
+ * A timeout handler. Called after time interval has expired.
+ */
+typedef void thand_f(void);
+
+#ifdef CONFIG_NET_MULTI
+
+#define NAMESIZE 16
+
+enum eth_state_t {
+ ETH_STATE_INIT,
+ ETH_STATE_PASSIVE,
+ ETH_STATE_ACTIVE
+};
+
+struct eth_device {
+ char name[NAMESIZE];
+ unsigned char enetaddr[6];
+ int iobase;
+ int state;
+
+ int (*init) (struct eth_device*, bd_t*);
+ int (*send) (struct eth_device*, volatile void* pachet, int length);
+ int (*recv) (struct eth_device*);
+ void (*halt) (struct eth_device*);
+
+ struct eth_device *next;
+ void *priv;
+};
+
+extern int eth_initialize(bd_t *bis); /* Initialize network subsystem */
+extern int eth_register(struct eth_device* dev);/* Register network device */
+extern void eth_try_another(int first_restart); /* Change the device */
+extern struct eth_device *eth_get_dev(void); /* get the current device MAC */
+extern void eth_set_enetaddr(int num, char* a); /* Set new MAC address */
+#endif
+
+extern int eth_init(bd_t *bis); /* Initialize the device */
+extern int eth_send(volatile void *packet, int length); /* Send a packet */
+extern int eth_rx(void); /* Check for received packets */
+extern void eth_halt(void); /* stop SCC */
+
+
+/**********************************************************************/
+/*
+ * Protocol headers.
+ */
+
+/*
+ * Ethernet header
+ */
+typedef struct {
+ uchar et_dest[6]; /* Destination node */
+ uchar et_src[6]; /* Source node */
+ ushort et_protlen; /* Protocol or length */
+ uchar et_dsap; /* 802 DSAP */
+ uchar et_ssap; /* 802 SSAP */
+ uchar et_ctl; /* 802 control */
+ uchar et_snap1; /* SNAP */
+ uchar et_snap2;
+ uchar et_snap3;
+ ushort et_prot; /* 802 protocol */
+} Ethernet_t;
+
+#define ETHER_HDR_SIZE 14 /* Ethernet header size */
+#define E802_HDR_SIZE 22 /* 802 ethernet header size */
+#define PROT_IP 0x0800 /* IP protocol */
+#define PROT_ARP 0x0806 /* IP ARP protocol */
+#define PROT_RARP 0x8035 /* IP ARP protocol */
+
+#define IPPROTO_ICMP 1 /* Internet Control Message Protocol */
+#define IPPROTO_UDP 17 /* User Datagram Protocol */
+
+/*
+ * Internet Protocol (IP) header.
+ */
+typedef struct {
+ uchar ip_hl_v; /* header length and version */
+ uchar ip_tos; /* type of service */
+ ushort ip_len; /* total length */
+ ushort ip_id; /* identification */
+ ushort ip_off; /* fragment offset field */
+ uchar ip_ttl; /* time to live */
+ uchar ip_p; /* protocol */
+ ushort ip_sum; /* checksum */
+ IPaddr_t ip_src; /* Source IP address */
+ IPaddr_t ip_dst; /* Destination IP address */
+ ushort udp_src; /* UDP source port */
+ ushort udp_dst; /* UDP destination port */
+ ushort udp_len; /* Length of UDP packet */
+ ushort udp_xsum; /* Checksum */
+} IP_t;
+
+#define IP_HDR_SIZE_NO_UDP (sizeof (IP_t) - 8)
+#define IP_HDR_SIZE (sizeof (IP_t))
+
+
+/*
+ * Address Resolution Protocol (ARP) header.
+ */
+typedef struct
+{
+ ushort ar_hrd; /* Format of hardware address */
+# define ARP_ETHER 1 /* Ethernet hardware address */
+ ushort ar_pro; /* Format of protocol address */
+ uchar ar_hln; /* Length of hardware address */
+ uchar ar_pln; /* Length of protocol address */
+ ushort ar_op; /* Operation */
+# define ARPOP_REQUEST 1 /* Request to resolve address */
+# define ARPOP_REPLY 2 /* Response to previous request */
+
+# define RARPOP_REQUEST 3 /* Request to resolve address */
+# define RARPOP_REPLY 4 /* Response to previous request */
+
+ /*
+ * The remaining fields are variable in size, according to
+ * the sizes above, and are defined as appropriate for
+ * specific hardware/protocol combinations.
+ */
+ uchar ar_data[0];
+#if 0
+ uchar ar_sha[]; /* Sender hardware address */
+ uchar ar_spa[]; /* Sender protocol address */
+ uchar ar_tha[]; /* Target hardware address */
+ uchar ar_tpa[]; /* Target protocol address */
+#endif /* 0 */
+} ARP_t;
+
+#define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */
+
+/*
+ * ICMP stuff (just enough to handle (host) redirect messages)
+ */
+#define ICMP_REDIRECT 5 /* Redirect (change route) */
+
+/* Codes for REDIRECT. */
+#define ICMP_REDIR_NET 0 /* Redirect Net */
+#define ICMP_REDIR_HOST 1 /* Redirect Host */
+
+typedef struct icmphdr {
+ uchar type;
+ uchar code;
+ ushort checksum;
+ union {
+ struct {
+ ushort id;
+ ushort sequence;
+ } echo;
+ ulong gateway;
+ struct {
+ ushort __unused;
+ ushort mtu;
+ } frag;
+ } un;
+} ICMP_t;
+
+
+
+/*
+ * Maximum packet size; used to allocate packet storage.
+ * TFTP packets can be 524 bytes + IP header + ethernet header.
+ * Lets be conservative, and go for 38 * 16. (Must also be
+ * a multiple of 32 bytes).
+ */
+/*
+ * AS.HARNOIS : Better to set PKTSIZE to maximum size because
+ * traffic type is not always controlled
+ * maximum packet size = 1518
+ * maximum packet size and multiple of 32 bytes = 1536
+ */
+#define PKTSIZE 1518
+#define PKTSIZE_ALIGN 1536
+/*#define PKTSIZE 608*/
+
+/*
+ * Maximum receive ring size; that is, the number of packets
+ * we can buffer before overflow happens. Basically, this just
+ * needs to be enough to prevent a packet being discarded while
+ * we are processing the previous one.
+ */
+#define RINGSZ 4
+#define RINGSZ_LOG2 2
+
+/**********************************************************************/
+/*
+ * Globals.
+ *
+ * Note:
+ *
+ * All variables of type IPaddr_t are stored in NETWORK byte order
+ * (big endian).
+ */
+
+/* net.c */
+/** BOOTP EXTENTIONS **/
+extern IPaddr_t NetOurGatewayIP; /* Our gateway IP addresse */
+extern IPaddr_t NetOurSubnetMask; /* Our subnet mask (0 = unknown)*/
+extern IPaddr_t NetOurDNSIP; /* Our Domain Name Server (0 = unknown)*/
+extern char NetOurNISDomain[32]; /* Our NIS domain */
+extern char NetOurHostName[32]; /* Our hostname */
+extern char NetOurRootPath[64]; /* Our root path */
+extern ushort NetBootFileSize; /* Our boot file size in blocks */
+/** END OF BOOTP EXTENTIONS **/
+extern ulong NetBootFileXferSize; /* size of bootfile in bytes */
+extern uchar NetOurEther[6]; /* Our ethernet address */
+extern uchar NetServerEther[6]; /* Boot server enet address */
+extern IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */
+extern IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */
+extern volatile uchar * NetTxPacket; /* THE transmit packet */
+extern volatile uchar * NetRxPackets[PKTBUFSRX];/* Receive packets */
+extern volatile uchar * NetRxPkt; /* Current receive packet */
+extern int NetRxPktLen; /* Current rx packet length */
+extern unsigned NetIPID; /* IP ID (counting) */
+extern uchar NetBcastAddr[6]; /* Ethernet boardcast address */
+
+extern int NetState; /* Network loop state */
+#define NETLOOP_CONTINUE 1
+#define NETLOOP_RESTART 2
+#define NETLOOP_SUCCESS 3
+#define NETLOOP_FAIL 4
+
+#ifdef CONFIG_NET_MULTI
+extern int NetRestartWrap; /* Tried all network devices */
+#endif
+
+typedef enum { BOOTP, RARP, ARP, TFTP, DHCP } proto_t;
+
+/* from net/net.c */
+extern char BootFile[128]; /* Boot File name */
+
+/* Initialize the network adapter */
+extern int NetLoop(proto_t);
+
+/* Shutdown adapters and cleanup */
+extern void NetStop(void);
+
+/* Load failed. Start again. */
+extern void NetStartAgain(void);
+
+/* Set ethernet header */
+extern void NetSetEther(volatile uchar *, uchar *, uint);
+
+/* Set IP header */
+extern void NetSetIP(volatile uchar *, IPaddr_t, int, int, int);
+
+/* Checksum */
+extern int NetCksumOk(uchar *, int); /* Return true if cksum OK */
+extern uint NetCksum(uchar *, int); /* Calculate the checksum */
+
+/* Set callbacks */
+extern void NetSetHandler(rxhand_f *); /* Set RX packet handler */
+extern void NetSetTimeout(int, thand_f *); /* Set timeout handler */
+
+/* Transmit "NetTxPacket" */
+extern void NetSendPacket(volatile uchar *, int);
+
+/* Processes a received packet */
+extern void NetReceive(volatile uchar *, int);
+
+/* Print an IP address on the console */
+extern void print_IPaddr (IPaddr_t);
+
+/*
+ * The following functions are a bit ugly, but necessary to deal with
+ * alignment restrictions on ARM.
+ *
+ * We're using inline functions, which had the smallest memory
+ * footprint in our tests.
+ */
+/* return IP *in network byteorder* */
+static inline IPaddr_t NetReadIP(void *from)
+{
+ IPaddr_t ip;
+ memcpy((void*)&ip, from, sizeof(ip));
+ return ip;
+}
+
+/* return ulong *in network byteorder* */
+static inline ulong NetReadLong(ulong *from)
+{
+ ulong l;
+ memcpy((void*)&l, (void*)from, sizeof(l));
+ return l;
+}
+
+/* write IP *in network byteorder* */
+static inline void NetWriteIP(void *to, IPaddr_t ip)
+{
+ memcpy(to, (void*)&ip, sizeof(ip));
+}
+
+/* copy IP */
+static inline void NetCopyIP(void *to, void *from)
+{
+ memcpy(to, from, sizeof(IPaddr_t));
+}
+
+/* copy ulong */
+static inline void NetCopyLong(ulong *to, ulong *from)
+{
+ memcpy((void*)to, (void*)from, sizeof(ulong));
+}
+
+/* Convert an IP address to a string */
+extern void ip_to_string (IPaddr_t x, char *s);
+
+/* read an IP address from a environment variable */
+extern IPaddr_t getenv_IPaddr (char *);
+
+/* copy a filename (allow for "..." notation, limit length) */
+extern void copy_filename (uchar *dst, uchar *src, int size);
+
+/**********************************************************************/
+
+#endif /* __NET_H__ */