diff options
| author | oharboe <oharboe> | 2008-06-25 06:09:31 +0000 |
|---|---|---|
| committer | oharboe <oharboe> | 2008-06-25 06:09:31 +0000 |
| commit | f3395f8b23ef4054d7a569b4bcf16ee651833d2a (patch) | |
| tree | 2a56129a3db094eb406b745760cba96c10026afb /zpu/hdl/example | |
| parent | eeff43d65567e8f0fa8634081682f0d92cee3cee (diff) | |
| download | zpu-f3395f8b23ef4054d7a569b4bcf16ee651833d2a.zip zpu-f3395f8b23ef4054d7a569b4bcf16ee651833d2a.tar.gz | |
* do not enable interrupts for simzpu_small.do. hello world
does not have an interrupt handler, so this caused a BREAK
instruction to be executed.
Diffstat (limited to 'zpu/hdl/example')
| -rw-r--r-- | zpu/hdl/example/sim_small_fpga_top_noint.vhd | 178 | ||||
| -rw-r--r-- | zpu/hdl/example/simzpu_small.do | 2 |
2 files changed, 179 insertions, 1 deletions
diff --git a/zpu/hdl/example/sim_small_fpga_top_noint.vhd b/zpu/hdl/example/sim_small_fpga_top_noint.vhd new file mode 100644 index 0000000..86f9a8b --- /dev/null +++ b/zpu/hdl/example/sim_small_fpga_top_noint.vhd @@ -0,0 +1,178 @@ +--------------------------------------------------------------------------------
+-- Company:
+-- Engineer:
+--
+-- Create Date: 20:15:31 04/14/05
+-- Design Name:
+-- Module Name: fpga_top - behave
+-- Project Name:
+-- Target Device:
+-- Tool versions:
+-- Description:
+--
+-- Dependencies:
+--
+-- Revision:
+-- Revision 0.01 - File Created
+-- Additional Comments:
+--
+--------------------------------------------------------------------------------
+library IEEE;
+use IEEE.STD_LOGIC_1164.ALL;
+use ieee.numeric_std.all;
+
+---- Uncomment the following library declaration if instantiating
+---- any Xilinx primitives in this code.
+--library UNISIM;
+--use UNISIM.VComponents.all;
+
+library work;
+use work.zpu_config.all;
+use work.zpupkg.all;
+
+entity fpga_top is
+end fpga_top;
+
+architecture behave of fpga_top is
+
+
+signal clk : std_logic;
+
+signal areset : std_logic := '1';
+
+
+component zpu_io is
+ generic (
+ log_file: string := "log.txt"
+ );
+ port(
+ clk : in std_logic;
+ areset : in std_logic;
+ busy : out std_logic;
+ writeEnable : in std_logic;
+ readEnable : in std_logic;
+ write : in std_logic_vector(wordSize-1 downto 0);
+ read : out std_logic_vector(wordSize-1 downto 0);
+ addr : in std_logic_vector(maxAddrBit downto minAddrBit)
+ );
+end component;
+
+
+
+
+
+signal mem_busy : std_logic;
+signal mem_read : std_logic_vector(wordSize-1 downto 0);
+signal mem_write : std_logic_vector(wordSize-1 downto 0);
+signal mem_addr : std_logic_vector(maxAddrBitIncIO downto 0);
+signal mem_writeEnable : std_logic;
+signal mem_readEnable : std_logic;
+signal mem_writeMask: std_logic_vector(wordBytes-1 downto 0);
+
+signal enable : std_logic;
+
+signal dram_mem_busy : std_logic;
+signal dram_mem_read : std_logic_vector(wordSize-1 downto 0);
+signal dram_mem_write : std_logic_vector(wordSize-1 downto 0);
+signal dram_mem_writeEnable : std_logic;
+signal dram_mem_readEnable : std_logic;
+signal dram_mem_writeMask: std_logic_vector(wordBytes-1 downto 0);
+
+
+signal io_busy : std_logic;
+
+signal io_mem_read : std_logic_vector(wordSize-1 downto 0);
+signal io_mem_writeEnable : std_logic;
+signal io_mem_readEnable : std_logic;
+
+
+signal dram_ready : std_logic;
+signal io_ready : std_logic;
+signal io_reading : std_logic;
+
+
+
+signal break : std_logic;
+
+begin
+
+ zpu: zpu_core port map (
+ clk => clk ,
+ areset => areset,
+ enable => enable,
+ in_mem_busy => mem_busy,
+ mem_read => mem_read,
+ mem_write => mem_write,
+ out_mem_addr => mem_addr,
+ out_mem_writeEnable => mem_writeEnable,
+ out_mem_readEnable => mem_readEnable,
+ mem_writeMask => mem_writeMask,
+ interrupt => '0',
+ break => break);
+
+
+ ioMap: zpu_io port map (
+ clk => clk,
+ areset => areset,
+ busy => io_busy,
+ writeEnable => io_mem_writeEnable,
+ readEnable => io_mem_readEnable,
+ write => mem_write,
+ read => io_mem_read,
+ addr => mem_addr(maxAddrBit downto minAddrBit)
+ );
+
+ dram_mem_writeEnable <= mem_writeEnable and not mem_addr(ioBit);
+ dram_mem_readEnable <= mem_readEnable and not mem_addr(ioBit);
+ io_mem_writeEnable <= mem_writeEnable and mem_addr(ioBit);
+ io_mem_readEnable <= mem_readEnable and mem_addr(ioBit);
+ mem_busy <= io_busy;
+
+
+
+ -- Memory reads either come from IO or DRAM. We need to pick the right one.
+ memorycontrol:
+ process(dram_mem_read, dram_ready, io_ready, io_mem_read)
+ begin
+ mem_read <= (others => 'U');
+ if dram_ready='1' then
+ mem_read <= dram_mem_read;
+ end if;
+
+ if io_ready='1' then
+ mem_read <= (others => '0');
+ mem_read <= io_mem_read;
+ end if;
+ end process;
+
+
+
+ io_ready <= (io_reading or io_mem_readEnable) and not io_busy;
+
+ memoryControlSync:
+ process(clk, areset)
+ begin
+ if areset = '1' then
+ enable <= '0';
+ io_reading <= '0';
+ dram_ready <= '0';
+
+ elsif (clk'event and clk = '1') then
+ enable <= '1';
+ io_reading <= io_busy or io_mem_readEnable;
+ dram_ready<=dram_mem_readEnable;
+ end if;
+ end process;
+
+ -- wiggle the clock @ 100MHz
+ clock : PROCESS
+ begin
+ clk <= '0';
+ wait for 5 ns;
+ clk <= '1';
+ wait for 5 ns;
+ areset <= '0';
+ end PROCESS clock;
+
+
+end behave;
diff --git a/zpu/hdl/example/simzpu_small.do b/zpu/hdl/example/simzpu_small.do index 12d231b..2b64926 100644 --- a/zpu/hdl/example/simzpu_small.do +++ b/zpu/hdl/example/simzpu_small.do @@ -10,7 +10,7 @@ vlib work vcom -93 -explicit zpu_config.vhd
vcom -93 -explicit ../zpu4/core/zpupkg.vhd
vcom -93 -explicit ../zpu4/src/txt_util.vhd
-vcom -93 -explicit sim_small_fpga_top.vhd
+vcom -93 -explicit sim_small_fpga_top_noint.vhd
vcom -93 -explicit ../zpu4/core/zpu_core_small.vhd
vcom -93 -explicit helloworld.vhd
vcom -93 -explicit ../zpu4/src/timer.vhd
|
