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/* ethernet_i.h -- Definition of internal types and structures for Ethernet MAC

   Copyright (C) 2001 Erez Volk, erez@mailandnews.comopencores.org

   This file is part of OpenRISC 1000 Architectural Simulator.

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 2 of the License, or

   (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program; if not, write to the Free Software

   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#ifndef __OR1KSIM_PERIPHERAL_ETHERNET_I_H

#define __OR1KSIM_PERIPHERAL_ETHERNET_I_H

#include "ethernet.h"

#include "config.h"

#include <netpacket/packet.h>

#include <sys/ioctl.h>

#include <sys/socket.h>

#include <net/if.h>

/*

 * Ethernet protocol definitions

 */

#if HAVE_NET_ETHERNET_H

# include <net/ethernet.h>

#else /* !HAVE_NET_ETHERNET_H -*/

#include <sys/types.h>

#define ETH_ALEN    6

struct ether_addr

{

  u_int8_t ether_addr_octet[ETH_ALEN];

};

struct ether_header

{

  u_int8_t  ether_dhost[ETH_ALEN];      /* destination eth addr */

  u_int8_t  ether_shost[ETH_ALEN];      /* source ether addr    */

  u_int16_t ether_type;                 /* packet type ID field */

};

/* Ethernet protocol ID's */

#define ETHERTYPE_PUP           0x0200          /* Xerox PUP */

#define ETHERTYPE_IP            0x0800          /* IP */

#define ETHERTYPE_ARP           0x0806          /* Address resolution */

#define ETHERTYPE_REVARP        0x8035          /* Reverse ARP */

#define ETHER_ADDR_LEN  ETH_ALEN                 /* size of ethernet addr */

#define ETHER_TYPE_LEN  2                        /* bytes in type field */

#define ETHER_CRC_LEN   4                        /* bytes in CRC field */

#define ETHER_HDR_LEN   ETH_HLEN                 /* total octets in header */

#define ETHER_MIN_LEN   (ETH_ZLEN + ETHER_CRC_LEN) /* min packet length */

#define ETHER_MAX_LEN   (ETH_FRAME_LEN + ETHER_CRC_LEN) /* max packet length */

/* make sure ethenet length is valid */

#define ETHER_IS_VALID_LEN(foo) \

        ((foo) >= ETHER_MIN_LEN && (foo) <= ETHER_MAX_LEN)

/*

 * The ETHERTYPE_NTRAILER packet types starting at ETHERTYPE_TRAIL have

 * (type-ETHERTYPE_TRAIL)*512 bytes of data followed

 * by an ETHER type (as given above) and then the (variable-length) header.

 */

#define ETHERTYPE_TRAIL         0x1000          /* Trailer packet */

#define ETHERTYPE_NTRAILER      16

#define ETHERMTU        ETH_DATA_LEN

#define ETHERMIN        (ETHER_MIN_LEN-ETHER_HDR_LEN-ETHER_CRC_LEN)

#endif /* HAVE_NET_ETHERNET_H */

/*

 * Implementatino of Ethernet MAC Registers and State

 */

#define ETH_TXSTATE_IDLE        0

#define ETH_TXSTATE_WAIT4BD     10

#define ETH_TXSTATE_READFIFO    20

#define ETH_TXSTATE_TRANSMIT    30

#define ETH_RXSTATE_IDLE        0

#define ETH_RXSTATE_WAIT4BD     10

#define ETH_RXSTATE_RECV        20

#define ETH_RXSTATE_WRITEFIFO   30

#define ETH_RTX_FILE    0

#define ETH_RTX_SOCK    1

#define ETH_MAXPL   0x10000

struct eth_device

{

  /* Base address in memory */

  unsigned long baseaddr;

  /* Which Ethernet MAC is this? */

  unsigned eth_number;

  /* Which DMA controller is this MAC connected to */

  unsigned dma;

        unsigned tx_channel;

        unsigned rx_channel;

  /* Our address */

  unsigned char mac_address[ETH_ALEN];

  /* interrupt line */

  unsigned long mac_int;

  /* RX and TX file names and handles */

  const char *rxfile, *txfile;

        int txfd;

        int rxfd;

        off_t loopback_offset;

    int rtx_sock;

    int rtx_type;

    struct ifreq ifr;

    fd_set rfds, wfds;

        /* Current TX state */

        struct

        {

            unsigned long state;

            unsigned long bd_index;

            unsigned long bd;

            unsigned long bd_addr;

            unsigned working, waiting_for_dma, error;

            long packet_length;

            unsigned minimum_length, maximum_length;

            unsigned add_crc;

            unsigned crc_dly;

            unsigned long crc_value;

            long bytes_left, bytes_sent;

        } tx;

        /* Current RX state */

        struct

        {

            unsigned long state;

            unsigned long bd_index;

            unsigned long bd;

            unsigned long bd_addr;

            int fd;

            off_t *offset;

            unsigned working, error, waiting_for_dma;

            long packet_length, bytes_read, bytes_left;

        } rx;

  /* Visible registers */

  struct

  {

    unsigned long moder;

    unsigned long int_source;

    unsigned long int_mask;

    unsigned long ipgt;

    unsigned long ipgr1;

    unsigned long ipgr2;

    unsigned long packetlen;

    unsigned long collconf;

    unsigned long tx_bd_num;

    unsigned long controlmoder;

    unsigned long miimoder;

    unsigned long miicommand;

    unsigned long miiaddress;

    unsigned long miitx_data;

    unsigned long miirx_data;

    unsigned long miistatus;

    unsigned long hash0;

    unsigned long hash1;

    /* Buffer descriptors */

    unsigned long bd_ram[ETH_BD_SPACE / 4];

  } regs;

    unsigned char rx_buff[ETH_MAXPL];

    unsigned char tx_buff[ETH_MAXPL];

    unsigned char lo_buff[ETH_MAXPL];

};

#endif /* __OR1KSIM_PERIPHERAL_ETHERNET_I_H */