| Line 1... |
Line 1... |
-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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--
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--
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-- The Program Memory control unit.
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-- The Program Memory control unit.
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-- All operations related to the Program Memory are managed here.
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-- All operations related to the Program Memory are managed here.
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--
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--
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-- $Id: pmem_ctrl.vhd,v 1.1 2004-03-23 21:31:53 arniml Exp $
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-- $Id: pmem_ctrl.vhd,v 1.2 2004-04-24 23:44:25 arniml Exp $
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--
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--
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-- All rights reserved
|
-- All rights reserved
|
--
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--
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-- Redistribution and use in source and synthezised forms, with or without
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-- Redistribution and use in source and synthezised forms, with or without
|
-- modification, are permitted provided that the following conditions are met:
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-- modification, are permitted provided that the following conditions are met:
|
| Line 74... |
Line 74... |
|
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end pmem_ctrl;
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end pmem_ctrl;
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|
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|
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library ieee;
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library ieee;
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use ieee.std_logic_arith.all;
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use ieee.numeric_std.all;
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|
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use work.pmem_ctrl_pack.all;
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use work.pmem_ctrl_pack.all;
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use work.t48_pack.res_active_c;
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use work.t48_pack.res_active_c;
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use work.t48_pack.clk_active_c;
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use work.t48_pack.clk_active_c;
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use work.t48_pack.bus_idle_level_c;
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use work.t48_pack.bus_idle_level_c;
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| Line 147... |
Line 147... |
addr_type_i,
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addr_type_i,
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pmem_addr_q,
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pmem_addr_q,
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data_i)
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data_i)
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begin
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begin
|
-- default assignment
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-- default assignment
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pmem_addr_s <= CONV_STD_LOGIC_VECTOR(program_counter_q,
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pmem_addr_s <= STD_LOGIC_VECTOR(program_counter_q);
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pmem_addr_s'length);
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|
|
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case addr_type_i is
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case addr_type_i is
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when PM_PC =>
|
when PM_PC =>
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-- default is ok
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-- default is ok
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null;
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null;
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| Line 193... |
Line 192... |
data_o <= (others => bus_idle_level_c);
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data_o <= (others => bus_idle_level_c);
|
|
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if read_pmem_i then
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if read_pmem_i then
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data_o <= pmem_data_i;
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data_o <= pmem_data_i;
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elsif read_pcl_i then
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elsif read_pcl_i then
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data_o <= CONV_STD_LOGIC_VECTOR(program_counter_q(data_o'range), data_o'length);
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data_o <= STD_LOGIC_VECTOR(program_counter_q(data_o'range));
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elsif read_pch_i then
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elsif read_pch_i then
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data_o(3 downto 0) <= CONV_STD_LOGIC_VECTOR(program_counter_q(pmem_addr_width_c-1 downto data_o'high+1), 4);
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data_o(3 downto 0) <= STD_LOGIC_VECTOR(program_counter_q(pmem_addr_width_c-1 downto data_o'high+1));
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end if;
|
end if;
|
|
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end process data_output;
|
end process data_output;
|
--
|
--
|
-----------------------------------------------------------------------------
|
-----------------------------------------------------------------------------
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| Line 215... |
Line 214... |
|
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
|
-- File History:
|
-- File History:
|
--
|
--
|
-- $Log: not supported by cvs2svn $
|
-- $Log: not supported by cvs2svn $
|
|
-- Revision 1.1 2004/03/23 21:31:53 arniml
|
|
-- initial check-in
|
|
--
|
--
|
--
|
-------------------------------------------------------------------------------
|
-------------------------------------------------------------------------------
|
|
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No newline at end of file
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No newline at end of file
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