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acorn: Add support for the Acorn CLE 215+

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This is a NiteFury based PCIe M2 form-factor board originally
used for mining. It contains a speed grade 2 Artix 7 200T,
1GB of DDR3 and 32MB of flash.

The serial port is routed to pin 2 (RX) and 3 (TX) of the P2
connector (pin 1 is GND).

Note: Only 16MB of flash is currently usable until code is added
to configure the flash controller to use 4-bytes address commands
on that part.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
jtag-port
Benjamin Herrenschmidt 4 years ago
parent d200733252
commit dbb137437c
9 changed files with 19797 additions and 1 deletions
Show Stats Download Patch File Download Diff File

338
fpga/acorn-cle-215.xdc
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################################################################################
# clkin, reset, uart pins...
################################################################################
# clk200:0.p
set_property LOC J19 [get_ports {clk200_p}]
set_property IOSTANDARD DIFF_SSTL15 [get_ports {clk200_p}]

# clk200:0.n
set_property LOC H19 [get_ports {clk200_n}]
set_property IOSTANDARD DIFF_SSTL15 [get_ports {clk200_n}]

################################################################################
# P2 header used as UART
################################################################################

#set_property -dict { PACKAGE_PIN H5 IOSTANDARD LVCMOS33 } [get_ports { p2_io1_n }];
#set_property -dict { PACKAGE_PIN J5 IOSTANDARD LVCMOS33 } [get_ports { p2_io1_p }];
# AIO2_N
set_property -dict { PACKAGE_PIN J2 IOSTANDARD LVCMOS33 } [get_ports { uart_tx }];
# AIO2_P
set_property -dict { PACKAGE_PIN K2 IOSTANDARD LVCMOS33 } [get_ports { uart_rx }];

################################################################################
# DRAM
################################################################################

# ddram:0.a
set_property LOC M15 [get_ports {ddram_a[0]}]
set_property SLEW FAST [get_ports {ddram_a[0]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[0]}]

# ddram:0.a
set_property LOC L21 [get_ports {ddram_a[1]}]
set_property SLEW FAST [get_ports {ddram_a[1]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[1]}]

# ddram:0.a
set_property LOC M16 [get_ports {ddram_a[2]}]
set_property SLEW FAST [get_ports {ddram_a[2]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[2]}]

# ddram:0.a
set_property LOC L18 [get_ports {ddram_a[3]}]
set_property SLEW FAST [get_ports {ddram_a[3]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[3]}]

# ddram:0.a
set_property LOC K21 [get_ports {ddram_a[4]}]
set_property SLEW FAST [get_ports {ddram_a[4]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[4]}]

# ddram:0.a
set_property LOC M18 [get_ports {ddram_a[5]}]
set_property SLEW FAST [get_ports {ddram_a[5]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[5]}]

# ddram:0.a
set_property LOC M21 [get_ports {ddram_a[6]}]
set_property SLEW FAST [get_ports {ddram_a[6]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[6]}]

# ddram:0.a
set_property LOC N20 [get_ports {ddram_a[7]}]
set_property SLEW FAST [get_ports {ddram_a[7]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[7]}]

# ddram:0.a
set_property LOC M20 [get_ports {ddram_a[8]}]
set_property SLEW FAST [get_ports {ddram_a[8]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[8]}]

# ddram:0.a
set_property LOC N19 [get_ports {ddram_a[9]}]
set_property SLEW FAST [get_ports {ddram_a[9]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[9]}]

# ddram:0.a
set_property LOC J21 [get_ports {ddram_a[10]}]
set_property SLEW FAST [get_ports {ddram_a[10]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[10]}]

# ddram:0.a
set_property LOC M22 [get_ports {ddram_a[11]}]
set_property SLEW FAST [get_ports {ddram_a[11]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[11]}]

# ddram:0.a
set_property LOC K22 [get_ports {ddram_a[12]}]
set_property SLEW FAST [get_ports {ddram_a[12]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[12]}]

# ddram:0.a
set_property LOC N18 [get_ports {ddram_a[13]}]
set_property SLEW FAST [get_ports {ddram_a[13]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[13]}]

# ddram:0.a
set_property LOC N22 [get_ports {ddram_a[14]}]
set_property SLEW FAST [get_ports {ddram_a[14]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[14]}]

# ddram:0.a
set_property LOC J22 [get_ports {ddram_a[15]}]
set_property SLEW FAST [get_ports {ddram_a[15]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[15]}]

# ddram:0.ba
set_property LOC L19 [get_ports {ddram_ba[0]}]
set_property SLEW FAST [get_ports {ddram_ba[0]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_ba[0]}]

# ddram:0.ba
set_property LOC J20 [get_ports {ddram_ba[1]}]
set_property SLEW FAST [get_ports {ddram_ba[1]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_ba[1]}]

# ddram:0.ba
set_property LOC L20 [get_ports {ddram_ba[2]}]
set_property SLEW FAST [get_ports {ddram_ba[2]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_ba[2]}]

# ddram:0.ras_n
set_property LOC H20 [get_ports {ddram_ras_n}]
set_property SLEW FAST [get_ports {ddram_ras_n}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_ras_n}]

# ddram:0.cas_n
set_property LOC K18 [get_ports {ddram_cas_n}]
set_property SLEW FAST [get_ports {ddram_cas_n}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_cas_n}]

# ddram:0.we_n
set_property LOC L16 [get_ports {ddram_we_n}]
set_property SLEW FAST [get_ports {ddram_we_n}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_we_n}]

# ddram:0.dm
set_property LOC A19 [get_ports {ddram_dm[0]}]
set_property SLEW FAST [get_ports {ddram_dm[0]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dm[0]}]

# ddram:0.dm
set_property LOC G22 [get_ports {ddram_dm[1]}]
set_property SLEW FAST [get_ports {ddram_dm[1]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dm[1]}]

# ddram:0.dq
set_property LOC D19 [get_ports {ddram_dq[0]}]
set_property SLEW FAST [get_ports {ddram_dq[0]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[0]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[0]}]

# ddram:0.dq
set_property LOC B20 [get_ports {ddram_dq[1]}]
set_property SLEW FAST [get_ports {ddram_dq[1]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[1]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[1]}]

# ddram:0.dq
set_property LOC E19 [get_ports {ddram_dq[2]}]
set_property SLEW FAST [get_ports {ddram_dq[2]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[2]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[2]}]

# ddram:0.dq
set_property LOC A20 [get_ports {ddram_dq[3]}]
set_property SLEW FAST [get_ports {ddram_dq[3]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[3]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[3]}]

# ddram:0.dq
set_property LOC F19 [get_ports {ddram_dq[4]}]
set_property SLEW FAST [get_ports {ddram_dq[4]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[4]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[4]}]

# ddram:0.dq
set_property LOC C19 [get_ports {ddram_dq[5]}]
set_property SLEW FAST [get_ports {ddram_dq[5]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[5]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[5]}]

# ddram:0.dq
set_property LOC F20 [get_ports {ddram_dq[6]}]
set_property SLEW FAST [get_ports {ddram_dq[6]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[6]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[6]}]

# ddram:0.dq
set_property LOC C18 [get_ports {ddram_dq[7]}]
set_property SLEW FAST [get_ports {ddram_dq[7]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[7]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[7]}]

# ddram:0.dq
set_property LOC E22 [get_ports {ddram_dq[8]}]
set_property SLEW FAST [get_ports {ddram_dq[8]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[8]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[8]}]

# ddram:0.dq
set_property LOC G21 [get_ports {ddram_dq[9]}]
set_property SLEW FAST [get_ports {ddram_dq[9]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[9]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[9]}]

# ddram:0.dq
set_property LOC D20 [get_ports {ddram_dq[10]}]
set_property SLEW FAST [get_ports {ddram_dq[10]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[10]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[10]}]

# ddram:0.dq
set_property LOC E21 [get_ports {ddram_dq[11]}]
set_property SLEW FAST [get_ports {ddram_dq[11]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[11]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[11]}]

# ddram:0.dq
set_property LOC C22 [get_ports {ddram_dq[12]}]
set_property SLEW FAST [get_ports {ddram_dq[12]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[12]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[12]}]

# ddram:0.dq
set_property LOC D21 [get_ports {ddram_dq[13]}]
set_property SLEW FAST [get_ports {ddram_dq[13]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[13]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[13]}]

# ddram:0.dq
set_property LOC B22 [get_ports {ddram_dq[14]}]
set_property SLEW FAST [get_ports {ddram_dq[14]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[14]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[14]}]

# ddram:0.dq
set_property LOC D22 [get_ports {ddram_dq[15]}]
set_property SLEW FAST [get_ports {ddram_dq[15]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[15]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[15]}]

# ddram:0.dqs_p
set_property LOC F18 [get_ports {ddram_dqs_p[0]}]
set_property SLEW FAST [get_ports {ddram_dqs_p[0]}]
set_property IOSTANDARD DIFF_SSTL15 [get_ports {ddram_dqs_p[0]}]

# ddram:0.dqs_p
set_property LOC B21 [get_ports {ddram_dqs_p[1]}]
set_property SLEW FAST [get_ports {ddram_dqs_p[1]}]
set_property IOSTANDARD DIFF_SSTL15 [get_ports {ddram_dqs_p[1]}]

# ddram:0.dqs_n
set_property LOC E18 [get_ports {ddram_dqs_n[0]}]
set_property SLEW FAST [get_ports {ddram_dqs_n[0]}]
set_property IOSTANDARD DIFF_SSTL15 [get_ports {ddram_dqs_n[0]}]

# ddram:0.dqs_n
set_property LOC A21 [get_ports {ddram_dqs_n[1]}]
set_property SLEW FAST [get_ports {ddram_dqs_n[1]}]
set_property IOSTANDARD DIFF_SSTL15 [get_ports {ddram_dqs_n[1]}]

# ddram:0.clk_p
set_property LOC K17 [get_ports {ddram_clk_p}]
set_property SLEW FAST [get_ports {ddram_clk_p}]
set_property IOSTANDARD DIFF_SSTL15 [get_ports {ddram_clk_p}]

# ddram:0.clk_n
set_property LOC J17 [get_ports {ddram_clk_n}]
set_property SLEW FAST [get_ports {ddram_clk_n}]
set_property IOSTANDARD DIFF_SSTL15 [get_ports {ddram_clk_n}]

# ddram:0.cke
set_property LOC H22 [get_ports {ddram_cke}]
set_property SLEW FAST [get_ports {ddram_cke}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_cke}]

# ddram:0.odt
set_property LOC K19 [get_ports {ddram_odt}]
set_property SLEW FAST [get_ports {ddram_odt}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_odt}]

# ddram:0.reset_n
set_property LOC K16 [get_ports {ddram_reset_n}]
set_property SLEW FAST [get_ports {ddram_reset_n}]
set_property IOSTANDARD LVCMOS15 [get_ports {ddram_reset_n}]

################################################################################
# LEDs
################################################################################

set_property -dict { PACKAGE_PIN G3 IOSTANDARD LVCMOS33 } [get_ports { led0 }];
set_property -dict { PACKAGE_PIN H3 IOSTANDARD LVCMOS33 } [get_ports { led1 }];
set_property -dict { PACKAGE_PIN G4 IOSTANDARD LVCMOS33 } [get_ports { led2 }];
set_property -dict { PACKAGE_PIN H4 IOSTANDARD LVCMOS33 } [get_ports { led3 }];

###############################################################################
# SPI Flash
###############################################################################

set_property -dict { PACKAGE_PIN T19 IOSTANDARD LVCMOS33 } [get_ports { spi_flash_cs_n }];
set_property -dict { PACKAGE_PIN P22 IOSTANDARD LVCMOS33 } [get_ports { spi_flash_mosi }];
set_property -dict { PACKAGE_PIN R22 IOSTANDARD LVCMOS33 } [get_ports { spi_flash_miso }];
set_property -dict { PACKAGE_PIN P21 IOSTANDARD LVCMOS33 } [get_ports { spi_flash_wp_n }];
set_property -dict { PACKAGE_PIN R21 IOSTANDARD LVCMOS33 } [get_ports { spi_flash_hold_n }];


################################################################################
# Design constraints
################################################################################

set_property INTERNAL_VREF 0.750 [get_iobanks 34]
set_property CONFIG_MODE SPIx4 [current_design]
set_property BITSTREAM.CONFIG.SPI_BUSWIDTH 4 [current_design]
set_property BITSTREAM.CONFIG.OVERTEMPPOWERDOWN ENABLE [current_design]
set_property CONFIG_VOLTAGE 3.3 [current_design]
set_property CFGBVS VCCO [current_design]
set_property BITSTREAM.CONFIG.SPI_FALL_EDGE YES [current_design]
set_property BITSTREAM.GENERAL.COMPRESS TRUE [current_design]
set_property BITSTREAM.CONFIG.EXTMASTERCCLK_EN Div-1 [current_design]

################################################################################
# Clock constraints
################################################################################


create_clock -name clk200_p -period 5.0 [get_nets clk200_p]

################################################################################
# False path constraints
################################################################################


set_false_path -quiet -through [get_nets -hierarchical -filter {mr_ff == TRUE}]

set_false_path -quiet -to [get_pins -filter {REF_PIN_NAME == PRE} -of_objects [get_cells -hierarchical -filter {ars_ff1 == TRUE || ars_ff2 == TRUE}]]

set_max_delay 2 -quiet -from [get_pins -filter {REF_PIN_NAME == C} -of_objects [get_cells -hierarchical -filter {ars_ff1 == TRUE}]] -to [get_pins -filter {REF_PIN_NAME == D} -of_objects [get_cells -hierarchical -filter {ars_ff2 == TRUE}]]

12
fpga/clk_gen_plle2.vhd
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@ -40,6 +40,18 @@ architecture rtl of clock_generator is
force_rst => '1');
begin
case input_hz is
when 200000000 =>
case output_hz is
when 100000000 =>
return (clkin_period => 5.0,
clkfbout_mult => 8,
clkout_divide => 16,
divclk_divide => 1,
force_rst => '0');
when others =>
report "Unsupported output frequency" severity failure;
return bad_settings;
end case;
when 100000000 =>
case output_hz is
when 100000000 =>

319
fpga/top-acorn-cle-215.vhdl
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@ -0,0 +1,319 @@
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;

library unisim;
use unisim.vcomponents.all;

library work;
use work.wishbone_types.all;

entity toplevel is
generic (
MEMORY_SIZE : integer := 16384;
RAM_INIT_FILE : string := "firmware.hex";
CLK_FREQUENCY : positive := 100000000;
USE_LITEDRAM : boolean := false;
NO_BRAM : boolean := false;
DISABLE_FLATTEN_CORE : boolean := false;
SPI_FLASH_OFFSET : integer := 10485760;
SPI_FLASH_DEF_CKDV : natural := 1;
SPI_FLASH_DEF_QUAD : boolean := true;
LOG_LENGTH : natural := 2048;
UART_IS_16550 : boolean := true
);
port(
clk200_p : in std_ulogic;
clk200_n : in std_ulogic;

-- P2 signals used as UART
uart_rx : in std_ulogic;
uart_tx : out std_ulogic;

-- LEDs
led0 : out std_logic;
led1 : out std_logic;
led2 : out std_logic;
led3 : out std_logic;

-- SPI
spi_flash_cs_n : out std_ulogic;
spi_flash_mosi : inout std_ulogic;
spi_flash_miso : inout std_ulogic;
spi_flash_wp_n : inout std_ulogic;
spi_flash_hold_n : inout std_ulogic;

-- DRAM wires
ddram_a : out std_logic_vector(15 downto 0);
ddram_ba : out std_logic_vector(2 downto 0);
ddram_ras_n : out std_logic;
ddram_cas_n : out std_logic;
ddram_we_n : out std_logic;
ddram_dm : out std_logic_vector(1 downto 0);
ddram_dq : inout std_logic_vector(15 downto 0);
ddram_dqs_p : inout std_logic_vector(1 downto 0);
ddram_dqs_n : inout std_logic_vector(1 downto 0);
ddram_clk_p : out std_logic;
ddram_clk_n : out std_logic;
ddram_cke : out std_logic;
ddram_odt : out std_logic;
ddram_reset_n : out std_logic
);
end entity toplevel;

architecture behaviour of toplevel is

-- Internal clock
signal ext_clk : std_ulogic;

-- Reset signals:
signal soc_rst : std_ulogic;
signal pll_rst : std_ulogic;

-- Internal clock signals:
signal system_clk : std_ulogic;
signal system_clk_locked : std_ulogic;

-- DRAM main data wishbone connection
signal wb_dram_in : wishbone_master_out;
signal wb_dram_out : wishbone_slave_out;

-- DRAM control wishbone connection
signal wb_ext_io_in : wb_io_master_out;
signal wb_ext_io_out : wb_io_slave_out;
signal wb_ext_is_dram_csr : std_ulogic;
signal wb_ext_is_dram_init : std_ulogic;

-- Control/status
signal core_alt_reset : std_ulogic;

-- SPI flash
signal spi_sck : std_ulogic;
signal spi_cs_n : std_ulogic;
signal spi_sdat_o : std_ulogic_vector(3 downto 0);
signal spi_sdat_oe : std_ulogic_vector(3 downto 0);
signal spi_sdat_i : std_ulogic_vector(3 downto 0);

-- Fixup various memory sizes based on generics
function get_bram_size return natural is
begin
if USE_LITEDRAM and NO_BRAM then
return 0;
else
return MEMORY_SIZE;
end if;
end function;

function get_payload_size return natural is
begin
if USE_LITEDRAM and NO_BRAM then
return MEMORY_SIZE;
else
return 0;
end if;
end function;

constant BRAM_SIZE : natural := get_bram_size;
constant PAYLOAD_SIZE : natural := get_payload_size;
begin

-- Main SoC
soc0: entity work.soc
generic map(
MEMORY_SIZE => BRAM_SIZE,
RAM_INIT_FILE => RAM_INIT_FILE,
SIM => false,
CLK_FREQ => CLK_FREQUENCY,
HAS_DRAM => USE_LITEDRAM,
DRAM_SIZE => 1024 * 1024 * 1024,
DRAM_INIT_SIZE => PAYLOAD_SIZE,
DISABLE_FLATTEN_CORE => DISABLE_FLATTEN_CORE,
HAS_SPI_FLASH => true,
SPI_FLASH_DLINES => 4,
SPI_FLASH_OFFSET => SPI_FLASH_OFFSET,
SPI_FLASH_DEF_CKDV => SPI_FLASH_DEF_CKDV,
SPI_FLASH_DEF_QUAD => SPI_FLASH_DEF_QUAD,
LOG_LENGTH => LOG_LENGTH,
UART0_IS_16550 => UART_IS_16550
)
port map (
-- System signals
system_clk => system_clk,
rst => soc_rst,

-- UART signals
uart0_txd => uart_tx,
uart0_rxd => uart_rx,

-- SPI signals
spi_flash_sck => spi_sck,
spi_flash_cs_n => spi_cs_n,
spi_flash_sdat_o => spi_sdat_o,
spi_flash_sdat_oe => spi_sdat_oe,
spi_flash_sdat_i => spi_sdat_i,

-- DRAM wishbone
wb_dram_in => wb_dram_in,
wb_dram_out => wb_dram_out,
wb_ext_io_in => wb_ext_io_in,
wb_ext_io_out => wb_ext_io_out,
wb_ext_is_dram_csr => wb_ext_is_dram_csr,
wb_ext_is_dram_init => wb_ext_is_dram_init,
alt_reset => core_alt_reset
);

-- SPI Flash. The SPI clk needs to be fed through the STARTUPE2
-- primitive of the FPGA as it's not a normal pin
--
spi_flash_cs_n <= spi_cs_n;
spi_flash_mosi <= spi_sdat_o(0) when spi_sdat_oe(0) = '1' else 'Z';
spi_flash_miso <= spi_sdat_o(1) when spi_sdat_oe(1) = '1' else 'Z';
spi_flash_wp_n <= spi_sdat_o(2) when spi_sdat_oe(2) = '1' else 'Z';
spi_flash_hold_n <= spi_sdat_o(3) when spi_sdat_oe(3) = '1' else 'Z';
spi_sdat_i(0) <= spi_flash_mosi;
spi_sdat_i(1) <= spi_flash_miso;
spi_sdat_i(2) <= spi_flash_wp_n;
spi_sdat_i(3) <= spi_flash_hold_n;

STARTUPE2_INST: STARTUPE2
port map (
CLK => '0',
GSR => '0',
GTS => '0',
KEYCLEARB => '0',
PACK => '0',
USRCCLKO => spi_sck,
USRCCLKTS => '0',
USRDONEO => '1',
USRDONETS => '0'
);

clk200: IBUFDS
port map (
i => clk200_p,
ib => clk200_n,
o => ext_clk
);

nodram: if not USE_LITEDRAM generate
signal ddram_clk_dummy : std_ulogic;
begin
reset_controller: entity work.soc_reset
generic map(
RESET_LOW => false
)
port map(
ext_clk => ext_clk,
pll_clk => system_clk,
pll_locked_in => system_clk_locked,
ext_rst_in => '0',
pll_rst_out => pll_rst,
rst_out => soc_rst
);

clkgen: entity work.clock_generator
generic map(
CLK_INPUT_HZ => 200000000,
CLK_OUTPUT_HZ => CLK_FREQUENCY
)
port map(
ext_clk => ext_clk,
pll_rst_in => pll_rst,
pll_clk_out => system_clk,
pll_locked_out => system_clk_locked
);

led0 <= soc_rst;
led1 <= pll_rst;
led2 <= not system_clk_locked;
led3 <= '0';
core_alt_reset <= '0';

-- Vivado barfs on those differential signals if left
-- unconnected. So instanciate a diff. buffer and feed
-- it a constant '0'.
dummy_dram_clk: OBUFDS
port map (
O => ddram_clk_p,
OB => ddram_clk_n,
I => ddram_clk_dummy
);
ddram_clk_dummy <= '0';

end generate;

has_dram: if USE_LITEDRAM generate
signal dram_init_done : std_ulogic;
signal dram_init_error : std_ulogic;
signal dram_sys_rst : std_ulogic;
begin

-- Eventually dig out the frequency from the generator
-- but for now, assert it's 100Mhz
assert CLK_FREQUENCY = 100000000;

reset_controller: entity work.soc_reset
generic map(
RESET_LOW => false,
PLL_RESET_BITS => 18,
SOC_RESET_BITS => 1
)
port map(
ext_clk => ext_clk,
pll_clk => system_clk,
pll_locked_in => '1',
ext_rst_in => '0',
pll_rst_out => pll_rst,
rst_out => open
);

dram: entity work.litedram_wrapper
generic map(
DRAM_ABITS => 26,
DRAM_ALINES => 16,
DRAM_DLINES => 16,
DRAM_PORT_WIDTH => 128,
PAYLOAD_FILE => RAM_INIT_FILE,
PAYLOAD_SIZE => PAYLOAD_SIZE
)
port map(
clk_in => ext_clk,
rst => pll_rst,
system_clk => system_clk,
system_reset => soc_rst,
core_alt_reset => core_alt_reset,
pll_locked => system_clk_locked,

wb_in => wb_dram_in,
wb_out => wb_dram_out,
wb_ctrl_in => wb_ext_io_in,
wb_ctrl_out => wb_ext_io_out,
wb_ctrl_is_csr => wb_ext_is_dram_csr,
wb_ctrl_is_init => wb_ext_is_dram_init,

init_done => dram_init_done,
init_error => dram_init_error,

ddram_a => ddram_a,
ddram_ba => ddram_ba,
ddram_ras_n => ddram_ras_n,
ddram_cas_n => ddram_cas_n,
ddram_we_n => ddram_we_n,
ddram_cs_n => open,
ddram_dm => ddram_dm,
ddram_dq => ddram_dq,
ddram_dqs_p => ddram_dqs_p,
ddram_dqs_n => ddram_dqs_n,
ddram_clk_p => ddram_clk_p,
ddram_clk_n => ddram_clk_n,
ddram_cke => ddram_cke,
ddram_odt => ddram_odt,
ddram_reset_n => ddram_reset_n
);

led0 <= soc_rst;
led1 <= pll_rst;
led2 <= not dram_init_done or dram_init_error;
led3 <= not dram_init_error; -- Make it blink ?
end generate;
end architecture behaviour;

42
litedram/gen-src/acorn-cle-215.yml
Unescape Escape View File

@ -0,0 +1,42 @@
# This file is Copyright (c) 2018-2019 Florent Kermarrec <florent@enjoy-digital.fr>
# License: BSD

{
# General ------------------------------------------------------------------
"cpu": "None", # Type of CPU used for init/calib (vexriscv, lm32)
"cpu_variant":"standard",
"speedgrade": -2, # FPGA speedgrade
"memtype": "DDR3", # DRAM type

# PHY ----------------------------------------------------------------------
"cmd_delay": 0, # Command additional delay (in taps)
"cmd_latency": 0, # Command additional latency
"sdram_module": "MT41K512M16", # SDRAM modules of the board or SO-DIMM
"sdram_module_nb": 2, # Number of byte groups
"sdram_rank_nb": 1, # Number of ranks
"sdram_phy": "A7DDRPHY", # Type of FPGA PHY

# Electrical ---------------------------------------------------------------
"rtt_nom": "60ohm", # Nominal termination
"rtt_wr": "60ohm", # Write termination
"ron": "34ohm", # Output driver impedance

# Frequency ----------------------------------------------------------------
"input_clk_freq": 200e6, # Input clock frequency
"sys_clk_freq": 100e6, # System clock frequency (DDR_clk = 4 x sys_clk)
"iodelay_clk_freq": 200e6, # IODELAYs reference clock frequency

# Core ---------------------------------------------------------------------
"cmd_buffer_depth": 16, # Depth of the command buffer

# User Ports ---------------------------------------------------------------
"user_ports": {
"native_0": {
"type": "native",
},
},

# CSR Port -----------------------------------------------------------------
"csr_alignment" : 32,
"csr_data_width" : 32,
}

2
litedram/gen-src/generate.py
Unescape Escape View File

@ -140,7 +140,7 @@ def generate_one(t):

def main():

targets = ['arty','nexys-video', 'genesys2', 'sim']
targets = ['arty','nexys-video', 'genesys2', 'acorn-cle-215', 'sim']
for t in targets:
generate_one(t)

123
litedram/generated/acorn-cle-215/litedram-initmem.vhdl
Unescape Escape View File

@ -0,0 +1,123 @@
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
use std.textio.all;

library work;
use work.wishbone_types.all;
use work.utils.all;

entity dram_init_mem is
generic (
EXTRA_PAYLOAD_FILE : string := "";
EXTRA_PAYLOAD_SIZE : integer := 0
);
port (
clk : in std_ulogic;
wb_in : in wb_io_master_out;
wb_out : out wb_io_slave_out
);
end entity dram_init_mem;

architecture rtl of dram_init_mem is

constant INIT_RAM_SIZE : integer := 24576;
constant RND_PAYLOAD_SIZE : integer := round_up(EXTRA_PAYLOAD_SIZE, 8);
constant TOTAL_RAM_SIZE : integer := INIT_RAM_SIZE + RND_PAYLOAD_SIZE;
constant INIT_RAM_ABITS : integer := log2ceil(TOTAL_RAM_SIZE-1);
constant INIT_RAM_FILE : string := "litedram_core.init";

type ram_t is array(0 to (TOTAL_RAM_SIZE / 4) - 1) of std_logic_vector(31 downto 0);

-- XXX FIXME: Have a single init function called twice with
-- an offset as argument
procedure init_load_payload(ram: inout ram_t; filename: string) is
file payload_file : text open read_mode is filename;
variable ram_line : line;
variable temp_word : std_logic_vector(63 downto 0);
begin
for i in 0 to RND_PAYLOAD_SIZE-1 loop
exit when endfile(payload_file);
readline(payload_file, ram_line);
hread(ram_line, temp_word);
ram((INIT_RAM_SIZE/4) + i*2) := temp_word(31 downto 0);
ram((INIT_RAM_SIZE/4) + i*2+1) := temp_word(63 downto 32);
end loop;
assert endfile(payload_file) report "Payload too big !" severity failure;
end procedure;

impure function init_load_ram(name : string) return ram_t is
file ram_file : text open read_mode is name;
variable temp_word : std_logic_vector(63 downto 0);
variable temp_ram : ram_t := (others => (others => '0'));
variable ram_line : line;
begin
report "Payload size:" & integer'image(EXTRA_PAYLOAD_SIZE) &
" rounded to:" & integer'image(RND_PAYLOAD_SIZE);
report "Total RAM size:" & integer'image(TOTAL_RAM_SIZE) &
" bytes using " & integer'image(INIT_RAM_ABITS) &
" address bits";
for i in 0 to (INIT_RAM_SIZE/8)-1 loop
exit when endfile(ram_file);
readline(ram_file, ram_line);
hread(ram_line, temp_word);
temp_ram(i*2) := temp_word(31 downto 0);
temp_ram(i*2+1) := temp_word(63 downto 32);
end loop;
if RND_PAYLOAD_SIZE /= 0 then
init_load_payload(temp_ram, EXTRA_PAYLOAD_FILE);
end if;
return temp_ram;
end function;

impure function init_zero return ram_t is
variable temp_ram : ram_t := (others => (others => '0'));
begin
return temp_ram;
end function;

impure function initialize_ram(filename: string) return ram_t is
begin
report "Opening file " & filename;
if filename'length = 0 then
return init_zero;
else
return init_load_ram(filename);
end if;
end function;
signal init_ram : ram_t := initialize_ram(INIT_RAM_FILE);

attribute ram_style : string;
attribute ram_style of init_ram: signal is "block";

signal obuf : std_ulogic_vector(31 downto 0);
signal oack : std_ulogic;
begin

init_ram_0: process(clk)
variable adr : integer;
begin
if rising_edge(clk) then
oack <= '0';
if (wb_in.cyc and wb_in.stb) = '1' then
adr := to_integer((unsigned(wb_in.adr(INIT_RAM_ABITS-1 downto 2))));
if wb_in.we = '0' then
obuf <= init_ram(adr);
else
for i in 0 to 3 loop
if wb_in.sel(i) = '1' then
init_ram(adr)(((i + 1) * 8) - 1 downto i * 8) <=
wb_in.dat(((i + 1) * 8) - 1 downto i * 8);
end if;
end loop;
end if;
oack <= '1';
end if;
wb_out.ack <= oack;
wb_out.dat <= obuf;
end if;
end process;

wb_out.stall <= '0';

end architecture rtl;

1858
litedram/generated/acorn-cle-215/litedram_core.init
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17061
litedram/generated/acorn-cle-215/litedram_core.v
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File diff suppressed because one or more lines are too long

43
microwatt.core
Unescape Escape View File

@ -85,6 +85,12 @@ filesets:
- fpga/clk_gen_plle2.vhd : {file_type : vhdlSource-2008}
- fpga/top-nexys-video.vhdl : {file_type : vhdlSource-2008}

acorn_cle_215:
files:
- fpga/acorn-cle-215.xdc : {file_type : xdc}
- fpga/clk_gen_plle2.vhd : {file_type : vhdlSource-2008}
- fpga/top-acorn-cle-215.vhdl : {file_type : vhdlSource-2008}

arty_a7:
files:
- fpga/arty_a7.xdc : {file_type : xdc}
@ -122,6 +128,39 @@ targets:
vivado: {part : xc7a100tcsg324-1}
toplevel : toplevel

acorn-cle-215-nodram:
default_tool: vivado
filesets: [core, acorn_cle_215, soc, fpga, debug_xilinx, uart16550, xilinx_specific]
parameters :
- memory_size
- ram_init_file
- clk_input
- clk_frequency
- disable_flatten_core
- spi_flash_offset=10485760
- log_length=2048
- uart_is_16550
tools:
vivado: {part : xc7a200tsbg484-2}
toplevel : toplevel

acorn-cle-215:
default_tool: vivado
filesets: [core, acorn_cle_215, soc, fpga, debug_xilinx, litedram, uart16550, xilinx_specific]
parameters :
- memory_size
- ram_init_file
- use_litedram=true
- disable_flatten_core
- no_bram
- spi_flash_offset=10485760
- log_length=2048
- uart_is_16550
generate: [litedram_acorn_cle_215]
tools:
vivado: {part : xc7a200tsbg484-2}
toplevel : toplevel

nexys_video-nodram:
default_tool: vivado
filesets: [core, nexys_video, soc, fpga, debug_xilinx, uart16550, xilinx_specific]
@ -262,6 +301,10 @@ generate:
generator: litedram_gen
parameters: {board : nexys-video}

litedram_acorn_cle_215:
generator: litedram_gen
parameters: {board : acorn-cle-215}

parameters:
memory_size:
datatype : int

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