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// 
// OpenSPARC T2 Processor File: pcg_classes.vr
// Copyright (C) 1995-2007 Sun Microsystems, Inc. All Rights Reserved
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class byte_array {
    bit [7:0] val[];
}


// -----  Node Descriptor -----
class node_desc {
    bit	[47:0]	l2_addr;	// L2 address for this station
    bit	[15:0]	tci;		// Tag Control Information
    bit	[31:0]	ip_addr;	// IPv4 address of this substation
    bit	[128:0]	ipv6_addr;	// IPv6 address of this substation
    bit [7:0]   tos =0;         // TOS v4/Frame Class v6
    bit	[19:0]	src_port;	// Which ports may use this node as source
    bit [31:0]  spi = 0;        // Security Parameter Index for AH /ESP
    bit [7:0]   nxthdr = 06;
    
}

// -----  TCP/UDP Ports Descriptor -----
class tup_descr {
    bit	[15:0]	src_tcp_udp_port;	// Source TCP/UDP Port
    bit	[15:0]	dst_tcp_udp_port;	// Destination TCP/UDP Port

}

// -----  Frame Descriptor -----
class frame_desc {
    bit	[4:0]  frame_type = 0; // Frame Type (bit 3:  0=IPv4 Header 1=IPv6 Header) 
                               //             bit 4:  0=Tunneling off     
    bit	[1:0]  tunnel_type = 0;// selects between different tunneling combinations 
                               //    00: IPv4/IPv4 (default)   
                               //    01: IPv4/IPv6      
                               //    10: IPv6/IPv4    
                               //    11: IPv6/IPv6    
    integer    frame_class;    // L3 IP class
    integer    type;           // L3 IP class type (-1 = auto: length or type from class);
    integer    tpid;           // L2 Tagged frames custopm TPID value (-1 =  use default)
    integer    class_mask;     // Mask to be applied to class
    integer    class_funct;    // Mask Operation (0-AND, 1-OR)
    integer    data_type;      // Type of payload
    integer    data_seed;      // Seed for random data
    //integer    data_length;    // Length of payload (-1=make exactly 64 byte packets)

    task new() {
        frame_type  = 0;
        tunnel_type = 0;
        frame_class = 0;
        type = -1;
        tpid = -1;
        class_mask  = 0;
        class_funct = 0;
        data_type   = 0;
        data_seed   = 0;
        //data_length = 0;
    }
}


// -----  TCP Tx Parameters -----
class tmt_param {
   bit [31:0] adv_isn;
   bit [31:0] last_seqno;
   bit retr_timeout; //Initialize to zero          
   bit [15:0] adv_window_size;//Initialize to zero

   task new() {
        retr_timeout = 0;
        adv_window_size = 0;
        last_seqno = 0;
       }


  }

// -----  TCP Rx Parameters -----
class rcv_param {
   bit [31:0] rcv_isn;//User Programs while Setting "SYN"
   bit [31:0] last_ackno;
   bit timeout; //Initialize to zero          
   bit [15:0] rmt_window_size;//Initialize to zero

   task new() {
        timeout = 0;
        rmt_window_size = 0;
       }
  }


// -----  TCP State Parameters -----

class tcp_state {
   bit [5:0] tcp_flags;
   bit [3:0] tcp_st;//Initialise to zero now

   task new() {
        //tcp_flags = 6'b00_0010;//{(URG,ACK,PSH,RST,SYN,FIN}
        tcp_st = 0;
       }
}


// -----  FLow Descriptor To Generate Packets of Various Flows -----
class flow_desc {

    frame_desc frame = new; 
    node_desc  src_node = new;
    node_desc  dst_node = new;

        tup_descr  tup = new;
    rcv_param  rx_param = new;
    tmt_param  tx_param = new;
    tcp_state  fl_state = new ;
    integer    flow_no;


}
   

// -----  Forwarding Descriptor -----
class fwd_desc {
    // Forwarding Decision from FFLP
    bit	[23:0]  fwd_decision[5];
}

// -----  Class Descriptor -----
class l3_class_desc {
    bit	[7:0]   val[14];
}

// -----  Class Mask Descriptor -----
class l3_class_mask {
    bit	[7:0]   val[14];
}