finished types. wrote top-entity

src/axi3-interconnect.vhd

@@ -1,18 +1,28 @@
 library ieee;
+
 use ieee.std_logic_1164.all;
 use ieee.numeric_std.all;
+-- "work" denotes the curent library. Similar to this in C++, C# etc...
+use work.axi3intercon_pkg.all;
 
 entity axi3intercon is
+	generic(
+		constant MASTER_COUNT : natural := 1;
+		constant SLAVE_COUNT  : natural := 1
+	);
 	port(
 		aclk        : in  std_logic;
-		aresetn : in std_logic
+		aresetn     : in  std_logic;
+		masters_in  : out axi_masters_in(0 to MASTER_COUNT - 1);
+		masters_out : in  axi_masters_out(0 to MASTER_COUNT - 1);
+		slaves_in   : out axi_masters_in(0 to SLAVE_COUNT - 1);
+		slaves_out  : in  axi_masters_out(0 to SLAVE_COUNT - 1)
 	);
 end entity axi3intercon;
 
 architecture RTL of axi3intercon is
 	signal rst : std_logic;
 begin
-	
 	reset_sync : process(aclk, aresetn) is
 	begin
 		if aresetn = '0' then
@@ -22,6 +32,4 @@ begin
 		end if;
 	end process reset_sync;
 
-	
-
 end architecture RTL;

src/axi3-interconnect_pkg.vhd

@@ -3,17 +3,42 @@ use ieee.std_logic_1164.all;
 use ieee.numeric_std.all;
 
 package axi3intercon_pkg is
-	constant RID_MASTER_BITS : natural := 8;
-	constant RID_SLAVE_BITS  : natural := 10;
-	constant WID_MASTER_BITS : natural := 8;
-	constant WID_SLAVE_BITS  : natural := 10;
+	-- Slave bits have to be more. SLAVE_BITS = MASTER_BITS + log_2(MASTER_COUNT)
+	-- Master ID is padded onto ID to identify the transfer internally in the crossbar
+	-- This  is defined in AXI-3 and -4 Standard.
+	constant RID_MASTER_BITS : natural := 12;
+	constant RID_SLAVE_BITS  : natural := 14;
+	constant WID_MASTER_BITS : natural := 12;
+	constant WID_SLAVE_BITS  : natural := 14;
 
 	constant DATA_BITS    : natural := 32;
 	constant DATA_STROBES : natural := (DATA_BITS / 8);
 	constant ADDRESS_BITS : natural := 32;
 
-	constant MASTER_COUNT : natural := 2;
-	constant SLAVE_COUNT  : natural := 2;
+	constant USER_BITS : natural := 4;
+
+	-- Constant definitions for signals
+
+	--Definitions for burst size
+	constant AXI_SIZE_1   : std_logic_vector(2 downto 0) := (others => '0');
+	constant AXI_SIZE_2   : std_logic_vector(2 downto 0) := "001";
+	constant AXI_SIZE_4   : std_logic_vector(2 downto 0) := "010";
+	constant AXI_SIZE_8   : std_logic_vector(2 downto 0) := "011";
+	constant AXI_SIZE_16  : std_logic_vector(2 downto 0) := "100";
+	constant AXI_SIZE_32  : std_logic_vector(2 downto 0) := "101";
+	constant AXI_SIZE_64  : std_logic_vector(2 downto 0) := "110";
+	constant AXI_SIZE_128 : std_logic_vector(2 downto 0) := "111";
+
+	-- Definitions for response vector
+	constant AXI_RESP_OKAY   : std_logic_vector(1 downto 0) := "00";
+	constant AXI_RESP_EXOKAY : std_logic_vector(1 downto 0) := "01";
+	constant AXI_RESP_SLVERR : std_logic_vector(1 downto 0) := "10";
+	constant AXI_RESP_DECERR : std_logic_vector(1 downto 0) := "11";
+
+	-- Definitions for lock locked transactions (only AXI 3 supports locked access mode)
+	constant AXI_LOCK_NORMAL    : std_logic_vector(1 downto 0) := "00";
+	constant AXI_RESP_EXCLUSIVE : std_logic_vector(1 downto 0) := "01";
+	constant AXI_RESP_LOCKED    : std_logic_vector(1 downto 0) := "10";
 
 	-- type declarations for AW channel
 	type master_aw_out is record
@@ -83,7 +108,7 @@ package axi3intercon_pkg is
 		wdata  : std_logic_vector(DATA_BITS - 1 downto 0);
 		wstrb  : std_logic_vector(DATA_STROBES - 1 downto 0);
 		wlast  : std_logic;
-		wuser  : std_logic;             -- user defined
+		wuser  : std_logic_vector(USER_BITS - 1 downto 0); -- user defined
 		wvalid : std_logic;
 	end record master_w_out;
 
@@ -92,7 +117,7 @@ package axi3intercon_pkg is
 		wdata  : std_logic_vector(DATA_BITS - 1 downto 0);
 		wstrb  : std_logic_vector(DATA_STROBES - 1 downto 0);
 		wlast  : std_logic;
-		wuser  : std_logic;             -- user defined
+		wuser  : std_logic_vector(USER_BITS - 1 downto 0); -- user defined
 		wvalid : std_logic;
 	end record slave_w_in;
 
@@ -101,6 +126,94 @@ package axi3intercon_pkg is
 	end record master_w_in;
 
 	subtype slave_w_out is master_w_in;
+
+	-- Type declarations for R channel
+	type master_r_in is record
+		rid    : std_logic_vector(RID_MASTER_BITS - 1 downto 0);
+		rdata  : std_logic_vector(DATA_BITS - 1 downto 0);
+		rresp  : std_logic_vector(1 downto 0);
+		rlast  : std_logic;
+		ruser  : std_logic_vector(USER_BITS - 1 downto 0);
+		rvalid : std_logic;
+	end record master_r_in;
+
+	type slave_r_out is record
+		rid    : std_logic_vector(RID_SLAVE_BITS - 1 downto 0);
+		rdata  : std_logic_vector(DATA_BITS - 1 downto 0);
+		rresp  : std_logic_vector(1 downto 0);
+		rlast  : std_logic;
+		ruser  : std_logic_vector(USER_BITS - 1 downto 0);
+		rvalid : std_logic;
+	end record slave_r_out;
+
+	type master_r_out is record
+		rready : std_logic;
+	end record master_r_out;
+
+	subtype slave_r_in is master_r_out;
+
+	-- Type declarations for B channel
+	type master_b_in is record
+		bid    : std_logic_vector(WID_MASTER_BITS - 1 downto 0);
+		bresp  : std_logic_vector(1 downto 0);
+		buser  : std_logic_vector(USER_BITS - 1 downto 0);
+		bvalid : std_logic;
+	end record master_b_in;
+
+	type slave_b_out is record
+		bid    : std_logic_vector(WID_SLAVE_BITS - 1 downto 0);
+		bresp  : std_logic_vector(1 downto 0);
+		buser  : std_logic_vector(USER_BITS - 1 downto 0);
+		bvalid : std_logic;
+	end record slave_b_out;
+
+	type master_b_out is record
+		bready : std_logic;
+	end record master_b_out;
+
+	subtype slave_b_in is master_b_out;
+
+	-- Combined definitions
+
+	type axi_master_in is record
+		aw : master_aw_in;
+		ar : master_ar_in;
+		w  : master_w_in;
+		r  : master_r_in;
+		b  : master_b_in;
+	end record axi_master_in;
+
+	type axi_master_out is record
+		aw : master_aw_out;
+		ar : master_ar_out;
+		w  : master_w_out;
+		r  : master_r_out;
+		b  : master_b_out;
+	end record axi_master_out;
+
+	type axi_slave_in is record
+		aw : slave_aw_in;
+		ar : slave_ar_in;
+		w  : slave_w_in;
+		r  : slave_r_in;
+		b  : slave_b_in;
+	end record axi_slave_in;
+
+	type axi_slave_out is record
+		aw : slave_aw_out;
+		ar : slave_ar_out;
+		w  : slave_w_out;
+		r  : slave_r_out;
+		b  : slave_b_out;
+	end record axi_slave_out;
+
+	-- Array definitions
+
+	type axi_masters_in is array (natural range <>) of axi_master_in;
+	type axi_masters_out is array (natural range <>) of axi_master_out;
+	type axi_slaves_in is array (natural range <>) of axi_slave_in;
+	type axi_slaves_out is array (natural range <>) of axi_slave_out;
+
 end package axi3intercon_pkg;
 
 -- package body axi3intercon_pkg is