//
// Copyright (c) 2026, Apollo Telephone Laboratories.
// Provided under the BSD-3 clause.
//

`ifndef BUS_ARI_SVH
`define BUS_ARI_SVH 1

//
// Number of bus segments / endpoints supported, this value
// should be bumped per every new device added to the chip.
//
parameter ARI_SEGMENT_COUNT = 3;

// Physical memory address bit-width
parameter PMA_XLEN          = 32;

//
// ARI bus tags for determining payload type
//
// @ARI_NOP:  No-operation, as per the spec
//
typedef enum logic [3:0] {
    ARI_NOP
} AriTag;

//
// Represents an ARI frame that encapsulates a payload.
// Refer to the ARI specification.
//
// @tag:        Frame tag / kind
// @seq:        Frame sequence
// @payload:    Payload (reserved if tag = ARI_NOP)
//
typedef struct packed {
    AriTag tag;
    logic [3:0] seq;
    logic [127:0] payload;
} AriFrame;

`endif  // !BUS_ARI_SVH