| 1 |
17 |
daniel.kho |
/*
|
| 2 |
|
|
This file is part of the AXI4 Transactor and Bus Functional Model
|
| 3 |
|
|
(axi4_tlm_bfm) project:
|
| 4 |
|
|
http://www.opencores.org/project,axi4_tlm_bfm
|
| 5 |
|
|
|
| 6 |
|
|
Description
|
| 7 |
|
|
This implements a generic interface for transactors, and has a set
|
| 8 |
|
|
of reusable procedures to read and write from / to a bus. This
|
| 9 |
|
|
interface can be used in many different bus protocols, by means of
|
| 10 |
|
|
instantiating this package. An example implementation for the AXI4
|
| 11 |
|
|
protocol can be found at
|
| 12 |
|
|
pkg-axi-tlm.vhdl
|
| 13 |
|
|
under the axi4_tlm_bfm project.
|
| 14 |
|
|
|
| 15 |
|
|
To Do:
|
| 16 |
|
|
|
| 17 |
|
|
Author(s):
|
| 18 |
|
|
- Daniel C.K. Kho, daniel.kho@opencores.org | daniel.kho@tauhop.com
|
| 19 |
|
|
|
| 20 |
|
|
Copyright (C) 2012-2013 Authors and OPENCORES.ORG
|
| 21 |
|
|
|
| 22 |
|
|
This source file may be used and distributed without
|
| 23 |
|
|
restriction provided that this copyright statement is not
|
| 24 |
|
|
removed from the file and that any derivative work contains
|
| 25 |
|
|
the original copyright notice and the associated disclaimer.
|
| 26 |
|
|
|
| 27 |
|
|
This source file is free software; you can redistribute it
|
| 28 |
|
|
and/or modify it under the terms of the GNU Lesser General
|
| 29 |
|
|
Public License as published by the Free Software Foundation;
|
| 30 |
|
|
either version 2.1 of the License, or (at your option) any
|
| 31 |
|
|
later version.
|
| 32 |
|
|
|
| 33 |
|
|
This source is distributed in the hope that it will be
|
| 34 |
|
|
useful, but WITHOUT ANY WARRANTY; without even the implied
|
| 35 |
|
|
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
|
| 36 |
|
|
PURPOSE. See the GNU Lesser General Public License for more
|
| 37 |
|
|
details.
|
| 38 |
|
|
|
| 39 |
|
|
You should have received a copy of the GNU Lesser General
|
| 40 |
|
|
Public License along with this source; if not, download it
|
| 41 |
|
|
from http://www.opencores.org/lgpl.shtml.
|
| 42 |
|
|
*/
|
| 43 |
|
|
/* FIXME VHDL-2008 instantiated package. Unsupported by VCS-MX, Quartus, and Vivado. QuestaSim/ModelSim supports well. */
|
| 44 |
|
|
library ieee; use ieee.std_logic_1164.all, ieee.numeric_std.all;
|
| 45 |
|
|
--use std.textio.all;
|
| 46 |
|
|
|
| 47 |
|
|
package tlm is
|
| 48 |
|
|
generic(type t_addr; type t_data; type t_cnt);
|
| 49 |
|
|
|
| 50 |
|
|
-- /* TODO remove once generic packages are supported. */
|
| 51 |
|
|
-- subtype t_addr is u_unsigned(31 downto 0);
|
| 52 |
|
|
-- subtype t_data is std_ulogic_vector(31 downto 0);
|
| 53 |
|
|
-- subtype t_cnt is u_unsigned(127 downto 0);
|
| 54 |
|
|
|
| 55 |
|
|
/* BFM control interface.
|
| 56 |
|
|
address is only used for non-stream interfaces.
|
| 57 |
|
|
*/
|
| 58 |
|
|
type t_bfm is record
|
| 59 |
|
|
address: t_addr;
|
| 60 |
|
|
data: t_data;
|
| 61 |
|
|
trigger: std_ulogic;
|
| 62 |
|
|
end record t_bfm;
|
| 63 |
|
|
|
| 64 |
|
|
procedure write(
|
| 65 |
|
|
signal request: out t_bfm;
|
| 66 |
|
|
address: in t_addr;
|
| 67 |
|
|
data: in t_data
|
| 68 |
|
|
);
|
| 69 |
|
|
|
| 70 |
|
|
procedure read(
|
| 71 |
|
|
signal request: out t_bfm;
|
| 72 |
|
|
address: in t_addr
|
| 73 |
|
|
);
|
| 74 |
|
|
end package tlm;
|
| 75 |
|
|
|
| 76 |
|
|
package body tlm is
|
| 77 |
|
|
procedure write(
|
| 78 |
|
|
signal request: out t_bfm;
|
| 79 |
|
|
address: in t_addr; -- used only for non-stream interfaces.
|
| 80 |
|
|
data: in t_data
|
| 81 |
|
|
) is begin
|
| 82 |
|
|
request.address <= address;
|
| 83 |
|
|
request.data <= data;
|
| 84 |
|
|
request.trigger <= not request.trigger;
|
| 85 |
|
|
end procedure write;
|
| 86 |
|
|
|
| 87 |
|
|
procedure read(
|
| 88 |
|
|
signal request: out t_bfm;
|
| 89 |
|
|
address: in t_addr -- used only for non-stream interfaces.
|
| 90 |
|
|
) is begin
|
| 91 |
|
|
request.address <= address;
|
| 92 |
|
|
request.trigger <= not request.trigger;
|
| 93 |
|
|
--report "request.address: " & to_hstring(request.address);
|
| 94 |
|
|
end procedure read;
|
| 95 |
|
|
end package body tlm;
|
