Subversion Repositories mpmc8

// ============================================================================
//        __
//   \\__/ o\    (C) 2022  Robert Finch, Waterloo
//    \  __ /    All rights reserved.
//     \/_//     robfinch<remove>@finitron.ca
//       ||
//
// BSD 3-Clause License
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
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//    this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// ============================================================================
//
package mpmc10_pkg;

parameter CACHE_ASSOC = 4;

parameter RMW = 0;
parameter NAR = 2;
parameter AMSB = 28;
parameter TRUE = 1'b1;
parameter FALSE = 1'b0;
parameter CMD_READ = 3'b001;
parameter CMD_WRITE = 3'b000;

// State machine states
typedef enum logic [3:0] {
        IDLE = 4'd0,
        PRESET1 = 4'd1,
        PRESET2 = 4'd2,
        WRITE_DATA0 = 4'd3,
        WRITE_DATA1 = 4'd4,
        WRITE_DATA2 = 4'd5,
        WRITE_DATA3 = 4'd6,
        READ_DATA = 4'd7,
        READ_DATA0 = 4'd8,
        READ_DATA1 = 4'd9,
        READ_DATA2 = 4'd10,
        WAIT_NACK = 4'd11,
        WRITE_TRAMP = 4'd12,    // write trampoline
        WRITE_TRAMP1 = 4'd13,
        PRESET3 = 4'd14
} mpmc10_state_t;

typedef struct packed
{
        logic [31:4] tag;
        logic modified;
        logic [127:0] data;
} mpmc10_cache_line_t;

typedef struct packed
{
        mpmc10_cache_line_t [CACHE_ASSOC-1:0] lines;
} mpmc10_quad_cache_line_t;

endpackage