| Line 4... |
Line 4... |
-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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-- File : addr_gen.vhd
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-- File : addr_gen.vhd
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-- Author : Lasse Lehtonen
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-- Author : Lasse Lehtonen
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-- Company :
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-- Company :
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-- Created : 2011-10-12
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-- Created : 2011-10-12
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-- Last update: 2011-10-25
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-- Last update: 2012-05-10
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-- Platform :
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-- Platform :
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-- Standard : VHDL'87
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-- Standard : VHDL'87
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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-- Description:
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-- Description:
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-- Handles address flit repeating when data comes slowly from IP and
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-- Handles address flit repeating when data comes slowly from IP and
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| Line 29... |
Line 29... |
entity addr_gen is
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entity addr_gen is
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|
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generic (
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generic (
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cmd_width_g : positive;
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cmd_width_g : positive;
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data_width_g : positive;
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data_width_g : positive;
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addr_flit_en_g : natural);
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addr_flit_en_g : natural;
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noc_type_g : natural);
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|
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port (
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port (
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clk : in std_logic;
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clk : in std_logic;
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rst_n : in std_logic;
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rst_n : in std_logic;
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-- from IP side
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-- from IP side
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| Line 74... |
Line 75... |
first_data_r <= '0';
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first_data_r <= '0';
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net_cmd_out <= (others => '0');
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net_cmd_out <= (others => '0');
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net_data_out <= (others => '0');
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net_data_out <= (others => '0');
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elsif clk'event and clk = '1' then -- rising clock edge
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elsif clk'event and clk = '1' then -- rising clock edge
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|
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-- FH mesh
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if noc_type_g = 3 then
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if net_stall_in = '0' then
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net_cmd_out <= ip_cmd_in;
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net_data_out <= ip_data_in;
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end if;
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end if;
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|
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-- ase nocs
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if noc_type_g /= 3 then
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|
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-- default
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-- default
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if net_stall_in = '0' then
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if net_stall_in = '0' then
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stall_r <= '0';
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stall_r <= '0';
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end if;
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end if;
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|
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case state_r is
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case state_r is
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-----------------------------------------------------------------------
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---------------------------------------------------------------------
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-- IDLE
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-- IDLE
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-----------------------------------------------------------------------
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---------------------------------------------------------------------
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when idle =>
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when idle =>
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if net_stall_in = '0' then
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if net_stall_in = '0' then
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if ip_cmd_in = "00" then
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if ip_cmd_in = "00" then
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net_cmd_out <= "00";
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net_cmd_out <= "00";
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first_data_r <= '0';
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first_data_r <= '0';
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| Line 102... |
Line 114... |
net_data_out <= addr_r;
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net_data_out <= addr_r;
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state_r <= data;
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state_r <= data;
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end if;
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end if;
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end if;
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end if;
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|
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---------------------------------------------------------------------
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-------------------------------------------------------------------
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-- ADDR
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-- ADDR
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---------------------------------------------------------------------
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-------------------------------------------------------------------
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when addr =>
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when addr =>
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if net_stall_in = '0' then
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if net_stall_in = '0' then
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if ip_cmd_in = "00" then
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if ip_cmd_in = "00" then
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state_r <= idle;
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state_r <= idle;
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net_cmd_out <= "00";
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net_cmd_out <= "00";
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| Line 124... |
Line 136... |
data_r <= ip_data_in;
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data_r <= ip_data_in;
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state_r <= data;
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state_r <= data;
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end if;
|
end if;
|
end if;
|
end if;
|
|
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---------------------------------------------------------------------
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-------------------------------------------------------------------
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-- DATA
|
-- DATA
|
---------------------------------------------------------------------
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-------------------------------------------------------------------
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when data =>
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when data =>
|
if net_stall_in = '0' then
|
if net_stall_in = '0' then
|
if ip_cmd_in = "00" then
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if ip_cmd_in = "00" then
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if first_data_r = '1' and addr_flit_en_g = 1 then
|
if first_data_r = '1' and addr_flit_en_g = 1 then
|
stall_r <= '1';
|
stall_r <= '1';
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| Line 170... |
Line 182... |
end if;
|
end if;
|
|
|
when others => null;
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when others => null;
|
end case;
|
end case;
|
|
|
|
end if;
|
|
|
end if;
|
end if;
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end process fsm_p;
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end process fsm_p;
|
|
|
end rtl;
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end rtl;
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