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#ifndef PACKET_HEADER_H

#define PACKET_HEADER_H

//Message : [Packet|Packet|Packet|.....]

//Packet  : [Head flit|Body flit|Body flit|....|Tail flit]

//Flit    : [|Phit|Phit|....]

//|dst_addr|flit_num|src_addr|data|

//

//Null space is "000000000"

#define FLIT_SIZE               16

#define OI_FLIT_SIZE    16

#define FLIT_TYPE(x)    x<<15

#define FLIT_DST(addr)  addr<<14

#define PKT_SIZE(size)  size<<7

//                      Switching Table.

//WEST   EAST   SOUTH   NORTH   CORE

//

#define CORE    0

#define WEST    1

#define EAST    2

#define NORTH   3

#define SOUTH   4

#define _HEAD_FLIT      0x00

#define _BODY_FLIT      0x01

#define _TAIL_FLIT      0x02

#define R_FLAG          0x20000

typedef struct HEAD_FLIT{

        //LSB

        unsigned sequence       : 4;            //The sequence of flits.

        unsigned pkt_size       : 3;            //The number of flits. 2^4 = 16 Bytes.

        unsigned dst_addr       : 6;            //Destination address 2^6 = 64 address,so that is 64 tiles.

        unsigned conn_type      : 1;            //'1' is optical interconnects and '0' is electrical interconnects.

        unsigned type           : 2;            //'0' is header flit, '1' is body flit, and '2' is tail flit.

        //MSB

};

typedef struct BODY_FLIT{

        unsigned data           : 14;

        unsigned type           : 2;

};

typedef struct PACKET{

        HEAD_FLIT head;

        unsigned short *data;

};

#endif