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White Rabbit core collection
Commit 0f14c50b authored by Tomasz Wlostowski's avatar Tomasz Wlostowski
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WR core: imported from master branch

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modules/wrc_core/wb_reset.vhd 0 → 100644
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-------------------------------------------------------------------------------
-- Title : WhiteRabbit PTP Core ZPU reset generator
-- Project : WhiteRabbit
-------------------------------------------------------------------------------
-- File : wb_reset.vhd
-- Author : Grzegorz Daniluk
-- Company : Elproma
-- Created : 2011-04-04
-- Last update: 2011-06-16
-- Platform : FPGA-generics
-- Standard : VHDL
-------------------------------------------------------------------------------
-- Description:
-- WB_RESET is a reset signal generator for ZPU. It is controlled by wishbone
-- and is used by ZPU firmware loader(zpu-loader) to reset the processor during
-- copying the binary to dpram.
-------------------------------------------------------------------------------
-- Copyright (c) 2011 Grzegorz Daniluk
-------------------------------------------------------------------------------
-- Revisions :
-- Date Version Author Description
-- 2011-04-04 1.0 greg.d Created
-------------------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
entity wb_reset is
port(
clk_i : in std_logic;
rst_n_i : in std_logic;
genrst_n_o : out std_logic;
wb_addr_i : in std_logic_vector(1 downto 0);
wb_data_i : in std_logic_vector(31 downto 0);
wb_data_o : out std_logic_vector(31 downto 0);
wb_sel_i : in std_logic_vector(3 downto 0);
wb_stb_i : in std_logic;
wb_cyc_i : in std_logic;
wb_we_i : in std_logic;
wb_ack_o : out std_logic
);
end wb_reset;
architecture behaviour of wb_reset is
constant c_RST_REG : std_logic_vector(1 downto 0) := "00";
signal rst_reg : std_logic_vector(7 downto 0);
signal grst_n : std_logic_vector(20 downto 0);
signal ack_int : std_logic;
begin
process(clk_i, rst_n_i)
begin
if(rst_n_i = '0') then
ack_int <= '0';
rst_reg <= (others => '0');
elsif(rising_edge(clk_i)) then
if(wb_stb_i = '1' and wb_cyc_i = '1' and ack_int = '0') then
if(wb_we_i = '1') then
case wb_addr_i is
when c_RST_REG =>
rst_reg <= wb_data_i(7 downto 0);
when others =>
end case;
end if;
ack_int <= '1';
else
ack_int <= '0';
end if;
end if;
end process;
wb_ack_o <= ack_int;
process(clk_i, rst_n_i)
begin
if(rst_n_i = '0') then
grst_n <= (others => '1');
elsif(rising_edge(clk_i)) then
if(rst_reg(0) = '1') then
grst_n(0) <= '0';
else
grst_n(0) <= '1';
end if;
grst_n(grst_n'left downto 1) <= grst_n(grst_n'left-1 downto 0);
end if;
end process;
genrst_n_o <= grst_n(grst_n'left);
end behaviour;
modules/wrc_core/wr_core.vhd 0 → 100644
View file @ 0f14c50b
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modules/wrc_core/wrc_dpram.vhd 0 → 100644
View file @ 0f14c50b
-------------------------------------------------------------------------------
-- Title : Dual-port RAM for WR core
-- Project : WhiteRabbit
-------------------------------------------------------------------------------
-- File : wrc_dpram.vhd
-- Author : Grzegorz Daniluk
-- Company : Elproma
-- Created : 2011-02-15
-- Last update: 2011-07-18
-- Platform : FPGA-generics
-- Standard : VHDL
-------------------------------------------------------------------------------
-- Description:
-- Dual port RAM from genrams with wishbone interface
--
-------------------------------------------------------------------------------
-- Copyright (c) 2011 Grzegorz Daniluk
-------------------------------------------------------------------------------
-- Revisions :
-- Date Version Author Description
-- 2011-02-15 1.0 greg.d Created
-- 2011-06-09 1.01 twlostow Removed unnecessary generics
-------------------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
library work;
use work.genram_pkg.all;
entity wrc_dpram is
generic(
g_size : natural := 16384; -- 16 * 32bit = 64kB
g_init_file : string := ""
);
port(
clk_i : in std_logic;
rst_n_i : in std_logic;
--PORT A (Wishbone)
wb_addr_i : in std_logic_vector(f_log2_size(g_size)-1 downto 0);
wb_data_i : in std_logic_vector(31 downto 0);
wb_data_o : out std_logic_vector(31 downto 0);
wb_sel_i : in std_logic_vector(3 downto 0);
wb_cyc_i : in std_logic;
wb_stb_i : in std_logic;
wb_we_i : in std_logic;
wb_ack_o : out std_logic;
--PORT B (miniNIC)
mem_addr_i : in std_logic_vector(f_log2_size(g_size)-1 downto 0);
mem_data_i : in std_logic_vector(31 downto 0);
mem_data_o : out std_logic_vector(31 downto 0);
mem_wr_i : in std_logic
);
end wrc_dpram;
architecture struct of wrc_dpram is
signal s_wb_ack_o : std_logic;
signal muxed_we : std_logic;
signal s_bwea : std_logic_vector(3 downto 0);
signal s_bweb : std_logic_vector(3 downto 0);
begin
wb_ack_o <= s_wb_ack_o;
DPRAM : generic_dpram
generic map(
-- standard parameters
g_data_width => 32,
g_size => g_size,
g_with_byte_enable => true,
g_addr_conflict_resolution => "read_first",
g_init_file => g_init_file,
g_dual_clock => false
)
port map(
rst_n_i => rst_n_i,
-- Port A
clka_i => clk_i,
bwea_i => s_bwea,
wea_i => muxed_we, --wb_we_i,
aa_i => wb_addr_i,
da_i => wb_data_i,
qa_o => wb_data_o,
-- Port B
clkb_i => clk_i,
bweb_i => s_bweb,
web_i => mem_wr_i,
ab_i => mem_addr_i,
db_i => mem_data_i,
qb_o => mem_data_o
);
s_bwea <= wb_sel_i when (wb_we_i = '1' and wb_stb_i = '1' and wb_cyc_i = '1') else "0000";
s_bweb <= (others => mem_wr_i);
muxed_we <= wb_we_i when (wb_stb_i='1' and wb_cyc_i='1') else '0';
process(clk_i)
begin
if(rising_edge(clk_i)) then
if(rst_n_i = '0') then
s_wb_ack_o <= '0';
else
if(s_wb_ack_o = '1') then
s_wb_ack_o <= '0';
else
s_wb_ack_o <= wb_cyc_i and wb_stb_i;
end if;
end if;
end if;
end process;
end struct;
modules/wrc_core/wrc_periph.vhd 0 → 100644
View file @ 0f14c50b
-------------------------------------------------------------------------------
-- Title : WhiteRabbit PTP Core peripherials
-- Project : WhiteRabbit
-------------------------------------------------------------------------------
-- File : wrc_periph.vhd
-- Author : Grzegorz Daniluk
-- Company : Elproma
-- Created : 2011-04-04
-- Last update: 2011-07-18
-- Platform : FPGA-generics
-- Standard : VHDL
-------------------------------------------------------------------------------
-- Description:
-- WRC_PERIPH is a single WB slave which includes all 'small' WB peripherials
-- needed for WR PTP Core. It has: wb_gpio_port, wb_simple_uart, wb_tics and
-- wb_reset.
-- All those modules share Wishbone Slave interface, and the address bus is
-- used to choose one of them at a time.
--
-- wb_addr_i(11:0):
-- (11) -> select wb_reset
-- (10) -> select wb_tics
-- (9) -> select wb_uart
-- (8) -> select wb_gpio
-- (7:0)-> address shared between wb modules inside wrc_periph
-------------------------------------------------------------------------------
-- Copyright (c) 2011 Grzegorz Daniluk
-------------------------------------------------------------------------------
-- Revisions :
-- Date Version Author Description
-- 2011-04-04 1.0 greg.d Created
-------------------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
library work;
use work.wrcore_pkg.all;
entity wrc_periph is
generic(
g_gpio_pins : natural := 8;
g_virtual_uart : natural := 0;
g_tics_period: integer
);
port(
clk_sys_i : in std_logic;
clk_ref_i : in std_logic;
rst_n_i : in std_logic;
gpio_o : out std_logic_vector(g_gpio_pins-1 downto 0);
gpio_i : in std_logic_vector(g_gpio_pins-1 downto 0);
gpio_dir_o : out std_logic_vector(g_gpio_pins-1 downto 0);
uart_rxd_i: in std_logic;
uart_txd_o: out std_logic;
genrst_n_o: out std_logic;
wb_addr_i : in std_logic_vector(11 downto 0);
wb_data_i : in std_logic_vector(31 downto 0);
wb_data_o : out std_logic_vector(31 downto 0);
wb_sel_i : in std_logic_vector(3 downto 0);
wb_stb_i : in std_logic;
wb_cyc_i : in std_logic;
wb_we_i : in std_logic;
wb_ack_o : out std_logic
);
end wrc_periph;
architecture struct of wrc_periph is
component wb_tics
generic (
g_period : integer);
port (
rst_n_i : in std_logic;
clk_sys_i : in std_logic;
wb_addr_i : in std_logic_vector(1 downto 0);
wb_data_i : in std_logic_vector(31 downto 0);
wb_data_o : out std_logic_vector(31 downto 0);
wb_cyc_i : in std_logic;
wb_sel_i : in std_logic_vector(3 downto 0);
wb_stb_i : in std_logic;
wb_we_i : in std_logic;
wb_ack_o : out std_logic);
end component;
component wb_reset
port (
clk_i : in std_logic;
rst_n_i : in std_logic;
genrst_n_o : out std_logic;
wb_addr_i : in std_logic_vector(1 downto 0);
wb_data_i : in std_logic_vector(31 downto 0);
wb_data_o : out std_logic_vector(31 downto 0);
wb_sel_i : in std_logic_vector(3 downto 0);
wb_stb_i : in std_logic;
wb_cyc_i : in std_logic;
wb_we_i : in std_logic;
wb_ack_o : out std_logic);
end component;
component wb_simple_uart
port (
clk_sys_i : in std_logic;
rst_n_i : in std_logic;
wb_addr_i : in std_logic_vector(1 downto 0);
wb_data_i : in std_logic_vector(31 downto 0);
wb_data_o : out std_logic_vector(31 downto 0);
wb_cyc_i : in std_logic;
wb_sel_i : in std_logic_vector(3 downto 0);
wb_stb_i : in std_logic;
wb_we_i : in std_logic;
wb_ack_o : out std_logic;
uart_rxd_i : in std_logic;
uart_txd_o : out std_logic);
end component;
component wb_virtual_uart
port(
rst_n_i : in std_logic;
clk_sys_i : in std_logic;
wb_addr_i : in std_logic_vector(2 downto 0);
wb_data_i : in std_logic_vector(31 downto 0);
wb_data_o : out std_logic_vector(31 downto 0);
wb_cyc_i : in std_logic;
wb_sel_i : in std_logic_vector(3 downto 0);
wb_stb_i : in std_logic;
wb_we_i : in std_logic;
wb_ack_o : out std_logic
);
end component;
component wb_gpio_port
generic (
g_num_pins : natural;
g_with_builtin_tristates : boolean);
port (
clk_sys_i : in std_logic;
rst_n_i : in std_logic;
wb_sel_i : in std_logic;
wb_cyc_i : in std_logic;
wb_stb_i : in std_logic;
wb_we_i : in std_logic;
wb_adr_i : in std_logic_vector(5 downto 0);
wb_dat_i : in std_logic_vector(31 downto 0);
wb_dat_o : out std_logic_vector(31 downto 0);
wb_ack_o : out std_logic;
gpio_out_o : out std_logic_vector(g_num_pins-1 downto 0);
gpio_in_i : in std_logic_vector(g_num_pins-1 downto 0);
gpio_oen_o : out std_logic_vector(g_num_pins-1 downto 0));
end component;
type t_wbdata is array(3 downto 0) of std_logic_vector(31 downto 0);
signal wb_cycs_i : std_logic_vector(3 downto 0);
signal wb_stbs_i : std_logic_vector(3 downto 0);
signal wb_acks_o : std_logic_vector(3 downto 0);
signal wb_dats_o : t_wbdata;
signal wb_ack_int : std_logic;
begin
--TRIG3(11 downto 0) <= wb_addr_i(11 downto 0);
-- TRIG3(21 downto 12) <= (others => '0');
-- TRIG3(31 downto 28) <= wb_sel_i;
-- TRIG3(22) <= wb_cyc_i;
-- TRIG3(23) <= wb_stb_i;
-- TRIG3(24) <= wb_we_i;
-- TRIG3(25) <= wb_ack_int;
-- TRIG0 <= wb_data_i;
-- TRIG2(3 downto 0) <= wb_cycs_i;
-- TRIG2(7 downto 4) <= wb_acks_o;
wb_ack_o <= wb_ack_int;
GENWB:
for I in 0 to 3 generate
wb_cycs_i(I) <= wb_cyc_i and wb_addr_i(8+I);
wb_stbs_i(I) <= wb_stb_i and wb_addr_i(8+I);
end generate;
wb_ack_int <= wb_acks_o(0) when (wb_addr_i(11 downto 8)="0001") else
wb_acks_o(1) when (wb_addr_i(11 downto 8)="0010") else
wb_acks_o(2) when (wb_addr_i(11 downto 8)="0100") else
wb_acks_o(3) when (wb_addr_i(11 downto 8)="1000") else
'0';
wb_data_o <= wb_dats_o(0) when (wb_addr_i(11 downto 8)="0001") else
wb_dats_o(1) when (wb_addr_i(11 downto 8)="0010") else
wb_dats_o(2) when (wb_addr_i(11 downto 8)="0100") else
wb_dats_o(3) when (wb_addr_i(11 downto 8)="1000") else
(others=>'0');
GPIO: wb_gpio_port
generic map(
g_num_pins => g_gpio_pins,
g_with_builtin_tristates => false)
port map(
rst_n_i => rst_n_i,
clk_sys_i => clk_sys_i,
wb_sel_i => wb_sel_i(0),
wb_cyc_i => wb_cycs_i(0),
wb_stb_i => wb_stb_i,
wb_we_i => wb_we_i,
wb_adr_i => wb_addr_i(5 downto 0),
wb_dat_i => wb_data_i,
wb_dat_o => wb_dats_o(0),
wb_ack_o => wb_acks_o(0),
gpio_out_o => gpio_o,
gpio_in_i => gpio_i,
gpio_oen_o => gpio_dir_o
);
GEN_UART: if(g_virtual_uart = 0) generate
UART: wb_simple_uart
port map(
clk_sys_i => clk_sys_i,
rst_n_i => rst_n_i,
wb_addr_i => wb_addr_i(1 downto 0),
wb_data_i => wb_data_i,
wb_data_o => wb_dats_o(1),
wb_cyc_i => wb_cycs_i(1),
wb_sel_i => wb_sel_i,
wb_stb_i => wb_stb_i,
wb_we_i => wb_we_i,
wb_ack_o => wb_acks_o(1),
uart_rxd_i => uart_rxd_i,
uart_txd_o => uart_txd_o
);
end generate;
GEN_VIRTUART: if(g_virtual_uart = 1) generate
VIRTUAL_UART: wb_virtual_uart
port map(
rst_n_i => rst_n_i,
clk_sys_i => clk_sys_i,
wb_addr_i => wb_addr_i(2 downto 0),
wb_data_i => wb_data_i,
wb_data_o => wb_dats_o(1),
wb_cyc_i => wb_cycs_i(1),
wb_sel_i => wb_sel_i,
wb_stb_i => wb_stb_i,
wb_we_i => wb_we_i,
wb_ack_o => wb_acks_o(1)
);
end generate;
TICS: wb_tics
generic map (
g_period => g_tics_period)
port map(
clk_sys_i => clk_sys_i,
rst_n_i => rst_n_i,
wb_addr_i => wb_addr_i(1 downto 0),
wb_data_i => wb_data_i,
wb_data_o => wb_dats_o(2),
wb_cyc_i => wb_cycs_i(2),
wb_sel_i => wb_sel_i,
wb_stb_i => wb_stb_i,
wb_we_i => wb_we_i,
wb_ack_o => wb_acks_o(2)
);
RST_GEN: wb_reset
port map(
clk_i => clk_sys_i,
rst_n_i => rst_n_i,
genrst_n_o => genrst_n_o,
wb_addr_i => wb_addr_i(1 downto 0),
wb_data_i => wb_data_i,
wb_data_o => wb_dats_o(3),
wb_sel_i => wb_sel_i,
wb_stb_i => wb_stbs_i(3),
wb_cyc_i => wb_cycs_i(3),
wb_we_i => wb_we_i,
wb_ack_o => wb_acks_o(3)
);
end struct;
modules/wrc_core/wrcore_pkg.vhd 0 → 100644
View file @ 0f14c50b
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