#include <core.p4>
#include <sume_switch.p4>
#include "headers.p4"
#include "settings.p4"

/********************************************************************************
 * Possible bugs / things to fix:

- Does NoAction exist?
- Aligment of "meta" /  replace metadate with our own
- what does sume_metadata contain? ingress port is where?
nico@nsg-System:~$ find . -name sume_switch.p4
./master-thesis/support/semester-thesis-1/project/SSS_example_2_SS/bitsnpices/sume_switch.p4
nico@nsg-System:~$

/******************** INFO ONLY *************************/

// one-hot encoded: {DMA, NF3, DMA, NF2, DMA, NF1, DMA, NF0}
// typedef bit<8> port_t;

/* standard sume switch metadata */
// struct sume_metadata_t {
//     bit<16> dma_q_size; // measured in 32-byte words
//     bit<16> nf3_q_size; // measured in 32-byte words
//     bit<16> nf2_q_size; // measured in 32-byte words
//     bit<16> nf1_q_size; // measured in 32-byte words
//     bit<16> nf0_q_size; // measured in 32-byte words
//     bit<8> send_dig_to_cpu; // send digest_data to CPU
//     bit<8> drop;
//     port_t dst_port; // one-hot encoded: {DMA, NF3, DMA, NF2, DMA, NF1, DMA, NF0}
//     port_t src_port; // one-hot encoded: {DMA, NF3, DMA, NF2, DMA, NF1, DMA, NF0}
//     bit<16> pkt_len; // unsigned int
// }



/********************************************************************************
 * Header
 */


// digest_data, MUST be 256 bits -- not used by us
struct digest_data_t {
    bit<256> unused;
}


@Xilinx_MaxPacketRegion(1024)
parser TopParser(packet_in packet,
                 out headers hdr,
                 out metadata meta,
                 out digest_data_t digest_data,
                 inout sume_metadata_t standard_metadata) {

    #include "parsers.p4"
}

/********************************************************************************
 * Main
 */
control TopPipe(inout headers hdr,
                inout metadata meta,
                inout digest_data_t digest_data,
                inout sume_metadata_t sume_metadata) {

    /* FIXME: not sure what to do on netpfga */
    action drop() {
#ifndef _SUME_SWITCH_P4_
        mark_to_drop();
#endif
    }

    apply {
        dummy_table_for_netpfga.apply();
    }
}

/********************************************************************************
 * Deparser
 */

@Xilinx_MaxPacketRegion(1024)
control TopDeparser(packet_out packet,
                    in headers hdr,
                    in metadata meta,
                    inout digest_data_t digest_data,
                    inout sume_metadata_t sume_metadata) {

    #include "deparser.p4"
}

/********************************************************************************
 * Switch
 */

SimpleSumeSwitch(
    TopParser(),
    TopPipe(),
    TopDeparser()
) main;