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microwatt
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Merge pull request #277 from paulus/gpio

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A few cleanups. GPIO IRQ number is now 4 as 3 is now taken by the SD card.
remove-potato-uart
Michael Neuling 4 years ago
parent 7f44980611 f06a0f4e5a
commit 84473eda1b
6 changed files with 261 additions and 56 deletions
Show Stats Download Patch File Download Diff File

2
Makefile
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@ -54,7 +54,7 @@ core_files = decode_types.vhdl common.vhdl wishbone_types.vhdl fetch1.vhdl \
core.vhdl fpu.vhdl

soc_files = wishbone_arbiter.vhdl wishbone_bram_wrapper.vhdl sync_fifo.vhdl \
wishbone_debug_master.vhdl xics.vhdl syscon.vhdl soc.vhdl \
wishbone_debug_master.vhdl xics.vhdl syscon.vhdl gpio.vhdl soc.vhdl \
spi_rxtx.vhdl spi_flash_ctrl.vhdl

uart_files = $(wildcard uart16550/*.v)

75
fpga/arty_a7.xdc
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@ -9,15 +9,6 @@ set_property -dict { PACKAGE_PIN C2 IOSTANDARD LVCMOS33 } [get_ports { ext_rst_
set_property -dict { PACKAGE_PIN D10 IOSTANDARD LVCMOS33 } [get_ports { uart_main_tx }];
set_property -dict { PACKAGE_PIN A9 IOSTANDARD LVCMOS33 } [get_ports { uart_main_rx }];

################################################################################
# Pmod Header JC: UART (bottom)
################################################################################

set_property -dict { PACKAGE_PIN U14 IOSTANDARD LVCMOS33 } [get_ports { uart_pmod_cts_n }];
set_property -dict { PACKAGE_PIN V14 IOSTANDARD LVCMOS33 } [get_ports { uart_pmod_tx }];
set_property -dict { PACKAGE_PIN T13 IOSTANDARD LVCMOS33 } [get_ports { uart_pmod_rx }];
set_property -dict { PACKAGE_PIN U13 IOSTANDARD LVCMOS33 } [get_ports { uart_pmod_rts_n }];

################################################################################
# RGB LEDs
################################################################################
@ -138,39 +129,39 @@ set_property IOB true [get_cells -hierarchical -filter {NAME =~*.litesdcard/sdca
# Arduino/chipKIT shield connector
################################################################################

#set_property -dict { PACKAGE_PIN V15 IOSTANDARD LVCMOS33 } [get_ports { shield_io0 }];
#set_property -dict { PACKAGE_PIN U16 IOSTANDARD LVCMOS33 } [get_ports { shield_io1 }];
#set_property -dict { PACKAGE_PIN P14 IOSTANDARD LVCMOS33 } [get_ports { shield_io2 }];
#set_property -dict { PACKAGE_PIN T11 IOSTANDARD LVCMOS33 } [get_ports { shield_io3 }];
#set_property -dict { PACKAGE_PIN R12 IOSTANDARD LVCMOS33 } [get_ports { shield_io4 }];
#set_property -dict { PACKAGE_PIN T14 IOSTANDARD LVCMOS33 } [get_ports { shield_io5 }];
#set_property -dict { PACKAGE_PIN T15 IOSTANDARD LVCMOS33 } [get_ports { shield_io6 }];
#set_property -dict { PACKAGE_PIN T16 IOSTANDARD LVCMOS33 } [get_ports { shield_io7 }];
#set_property -dict { PACKAGE_PIN N15 IOSTANDARD LVCMOS33 } [get_ports { shield_io8 }];
#set_property -dict { PACKAGE_PIN M16 IOSTANDARD LVCMOS33 } [get_ports { shield_io9 }];
#set_property -dict { PACKAGE_PIN V17 IOSTANDARD LVCMOS33 } [get_ports { shield_io10 }];
#set_property -dict { PACKAGE_PIN U18 IOSTANDARD LVCMOS33 } [get_ports { shield_io11 }];
#set_property -dict { PACKAGE_PIN R17 IOSTANDARD LVCMOS33 } [get_ports { shield_io12 }];
#set_property -dict { PACKAGE_PIN P17 IOSTANDARD LVCMOS33 } [get_ports { shield_io13 }];
#set_property -dict { PACKAGE_PIN U11 IOSTANDARD LVCMOS33 } [get_ports { shield_io26 }];
#set_property -dict { PACKAGE_PIN V16 IOSTANDARD LVCMOS33 } [get_ports { shield_io27 }];
#set_property -dict { PACKAGE_PIN M13 IOSTANDARD LVCMOS33 } [get_ports { shield_io28 }];
#set_property -dict { PACKAGE_PIN R10 IOSTANDARD LVCMOS33 } [get_ports { shield_io29 }];
#set_property -dict { PACKAGE_PIN R11 IOSTANDARD LVCMOS33 } [get_ports { shield_io30 }];
#set_property -dict { PACKAGE_PIN R13 IOSTANDARD LVCMOS33 } [get_ports { shield_io31 }];
#set_property -dict { PACKAGE_PIN R15 IOSTANDARD LVCMOS33 } [get_ports { shield_io32 }];
#set_property -dict { PACKAGE_PIN P15 IOSTANDARD LVCMOS33 } [get_ports { shield_io33 }];
#set_property -dict { PACKAGE_PIN R16 IOSTANDARD LVCMOS33 } [get_ports { shield_io34 }];
#set_property -dict { PACKAGE_PIN N16 IOSTANDARD LVCMOS33 } [get_ports { shield_io35 }];
#set_property -dict { PACKAGE_PIN N14 IOSTANDARD LVCMOS33 } [get_ports { shield_io36 }];
#set_property -dict { PACKAGE_PIN U17 IOSTANDARD LVCMOS33 } [get_ports { shield_io37 }];
#set_property -dict { PACKAGE_PIN T18 IOSTANDARD LVCMOS33 } [get_ports { shield_io38 }];
#set_property -dict { PACKAGE_PIN R18 IOSTANDARD LVCMOS33 } [get_ports { shield_io39 }];
#set_property -dict { PACKAGE_PIN P18 IOSTANDARD LVCMOS33 } [get_ports { shield_io40 }];
#set_property -dict { PACKAGE_PIN N17 IOSTANDARD LVCMOS33 } [get_ports { shield_io41 }];
#set_property -dict { PACKAGE_PIN M17 IOSTANDARD LVCMOS33 } [get_ports { shield_ioa }];
#set_property -dict { PACKAGE_PIN L18 IOSTANDARD LVCMOS33 } [get_ports { shield_scl }];
#set_property -dict { PACKAGE_PIN M18 IOSTANDARD LVCMOS33 } [get_ports { shield_sda }];
set_property -dict { PACKAGE_PIN V15 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[0] }];
set_property -dict { PACKAGE_PIN U16 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[1] }];
set_property -dict { PACKAGE_PIN P14 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[2] }];
set_property -dict { PACKAGE_PIN T11 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[3] }];
set_property -dict { PACKAGE_PIN R12 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[4] }];
set_property -dict { PACKAGE_PIN T14 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[5] }];
set_property -dict { PACKAGE_PIN T15 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[6] }];
set_property -dict { PACKAGE_PIN T16 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[7] }];
set_property -dict { PACKAGE_PIN N15 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[8] }];
set_property -dict { PACKAGE_PIN M16 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[9] }];
set_property -dict { PACKAGE_PIN V17 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[10] }];
set_property -dict { PACKAGE_PIN U18 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[11] }];
set_property -dict { PACKAGE_PIN R17 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[12] }];
set_property -dict { PACKAGE_PIN P17 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[13] }];
set_property -dict { PACKAGE_PIN U11 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[26] }];
set_property -dict { PACKAGE_PIN V16 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[27] }];
set_property -dict { PACKAGE_PIN M13 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[28] }];
set_property -dict { PACKAGE_PIN R10 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[29] }];
set_property -dict { PACKAGE_PIN R11 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[30] }];
set_property -dict { PACKAGE_PIN R13 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[31] }];
set_property -dict { PACKAGE_PIN R15 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[32] }];
set_property -dict { PACKAGE_PIN P15 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[33] }];
set_property -dict { PACKAGE_PIN R16 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[34] }];
set_property -dict { PACKAGE_PIN N16 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[35] }];
set_property -dict { PACKAGE_PIN N14 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[36] }];
set_property -dict { PACKAGE_PIN U17 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[37] }];
set_property -dict { PACKAGE_PIN T18 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[38] }];
set_property -dict { PACKAGE_PIN R18 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[39] }];
set_property -dict { PACKAGE_PIN P18 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[40] }];
set_property -dict { PACKAGE_PIN N17 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[41] }];
set_property -dict { PACKAGE_PIN M17 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[42] }]; # A
set_property -dict { PACKAGE_PIN L18 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[43] }]; # SCL
set_property -dict { PACKAGE_PIN M18 IOSTANDARD LVCMOS33 PULLDOWN TRUE } [get_ports { shield_io[44] }]; # SDA
#set_property -dict { PACKAGE_PIN C2 IOSTANDARD LVCMOS33 } [get_ports { shield_rst }];

#set_property -dict { PACKAGE_PIN C1 IOSTANDARD LVCMOS33 } [get_ports { spi_hdr_ss }];

99
fpga/top-arty.vhdl
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@ -27,7 +27,8 @@ entity toplevel is
USE_LITEETH : boolean := false;
UART_IS_16550 : boolean := false;
HAS_UART1 : boolean := true;
USE_LITESDCARD : boolean := false
USE_LITESDCARD : boolean := false;
NGPIO : natural := 32
);
port(
ext_clk : in std_ulogic;
@ -37,12 +38,6 @@ entity toplevel is
uart_main_tx : out std_ulogic;
uart_main_rx : in std_ulogic;

-- UART1 signals:
uart_pmod_tx : out std_ulogic;
uart_pmod_rx : in std_ulogic;
uart_pmod_cts_n : in std_ulogic;
uart_pmod_rts_n : out std_ulogic;

-- LEDs
led0_b : out std_ulogic;
led0_g : out std_ulogic;
@ -60,6 +55,9 @@ entity toplevel is
spi_flash_wp_n : inout std_ulogic;
spi_flash_hold_n : inout std_ulogic;

-- GPIO
shield_io : inout std_ulogic_vector(44 downto 0);

-- Ethernet
eth_ref_clk : out std_ulogic;
eth_clocks_tx : in std_ulogic;
@ -158,6 +156,11 @@ architecture behaviour of toplevel is
signal spi_sdat_oe : std_ulogic_vector(3 downto 0);
signal spi_sdat_i : std_ulogic_vector(3 downto 0);

-- GPIO
signal gpio_in : std_ulogic_vector(NGPIO - 1 downto 0);
signal gpio_out : std_ulogic_vector(NGPIO - 1 downto 0);
signal gpio_dir : std_ulogic_vector(NGPIO - 1 downto 0);

-- Fixup various memory sizes based on generics
function get_bram_size return natural is
begin
@ -203,7 +206,8 @@ begin
HAS_LITEETH => USE_LITEETH,
UART0_IS_16550 => UART_IS_16550,
HAS_UART1 => HAS_UART1,
HAS_SD_CARD => USE_LITESDCARD
HAS_SD_CARD => USE_LITESDCARD,
NGPIO => NGPIO
)
port map (
-- System signals
@ -215,8 +219,8 @@ begin
uart0_rxd => uart_main_rx,

-- UART1 signals
uart1_txd => uart_pmod_tx,
uart1_rxd => uart_pmod_rx,
--uart1_txd => uart_pmod_tx,
--uart1_rxd => uart_pmod_rx,

-- SPI signals
spi_flash_sck => spi_sck,
@ -225,6 +229,11 @@ begin
spi_flash_sdat_oe => spi_sdat_oe,
spi_flash_sdat_i => spi_sdat_i,

-- GPIO signals
gpio_in => gpio_in,
gpio_out => gpio_out,
gpio_dir => gpio_dir,

-- External interrupts
ext_irq_eth => ext_irq_eth,
ext_irq_sdcard => ext_irq_sdcard,
@ -248,7 +257,7 @@ begin
alt_reset => core_alt_reset
);

uart_pmod_rts_n <= '0';
--uart_pmod_rts_n <= '0';

-- SPI Flash
--
@ -678,6 +687,72 @@ begin
led4 <= system_clk_locked;
led5 <= eth_clk_locked;
led6 <= not soc_rst;
led7 <= not spi_flash_cs_n;

-- GPIO
gpio_in(0) <= shield_io(0);
gpio_in(1) <= shield_io(1);
gpio_in(2) <= shield_io(2);
gpio_in(3) <= shield_io(3);
gpio_in(4) <= shield_io(4);
gpio_in(5) <= shield_io(5);
gpio_in(6) <= shield_io(6);
gpio_in(7) <= shield_io(7);
gpio_in(8) <= shield_io(8);
gpio_in(9) <= shield_io(9);
gpio_in(10) <= shield_io(10);
gpio_in(11) <= shield_io(11);
gpio_in(12) <= shield_io(12);
gpio_in(13) <= shield_io(13);
gpio_in(14) <= shield_io(26);
gpio_in(15) <= shield_io(27);
gpio_in(16) <= shield_io(28);
gpio_in(17) <= shield_io(29);
gpio_in(18) <= shield_io(30);
gpio_in(19) <= shield_io(31);
gpio_in(20) <= shield_io(32);
gpio_in(21) <= shield_io(33);
gpio_in(22) <= shield_io(34);
gpio_in(23) <= shield_io(35);
gpio_in(24) <= shield_io(36);
gpio_in(25) <= shield_io(37);
gpio_in(26) <= shield_io(38);
gpio_in(27) <= shield_io(39);
gpio_in(28) <= shield_io(40);
gpio_in(29) <= shield_io(41);
gpio_in(30) <= shield_io(43);
gpio_in(31) <= shield_io(44);

shield_io(0) <= gpio_out(0) when gpio_dir(0) = '1' else 'Z';
shield_io(1) <= gpio_out(1) when gpio_dir(1) = '1' else 'Z';
shield_io(2) <= gpio_out(2) when gpio_dir(2) = '1' else 'Z';
shield_io(3) <= gpio_out(3) when gpio_dir(3) = '1' else 'Z';
shield_io(4) <= gpio_out(4) when gpio_dir(4) = '1' else 'Z';
shield_io(5) <= gpio_out(5) when gpio_dir(5) = '1' else 'Z';
shield_io(6) <= gpio_out(6) when gpio_dir(6) = '1' else 'Z';
shield_io(7) <= gpio_out(7) when gpio_dir(7) = '1' else 'Z';
shield_io(8) <= gpio_out(8) when gpio_dir(8) = '1' else 'Z';
shield_io(9) <= gpio_out(9) when gpio_dir(9) = '1' else 'Z';
shield_io(10) <= gpio_out(10) when gpio_dir(10) = '1' else 'Z';
shield_io(11) <= gpio_out(11) when gpio_dir(11) = '1' else 'Z';
shield_io(12) <= gpio_out(12) when gpio_dir(12) = '1' else 'Z';
shield_io(13) <= gpio_out(13) when gpio_dir(13) = '1' else 'Z';
shield_io(26) <= gpio_out(14) when gpio_dir(14) = '1' else 'Z';
shield_io(27) <= gpio_out(15) when gpio_dir(15) = '1' else 'Z';
shield_io(28) <= gpio_out(16) when gpio_dir(16) = '1' else 'Z';
shield_io(29) <= gpio_out(17) when gpio_dir(17) = '1' else 'Z';
shield_io(30) <= gpio_out(18) when gpio_dir(18) = '1' else 'Z';
shield_io(31) <= gpio_out(19) when gpio_dir(19) = '1' else 'Z';
shield_io(32) <= gpio_out(20) when gpio_dir(20) = '1' else 'Z';
shield_io(33) <= gpio_out(21) when gpio_dir(21) = '1' else 'Z';
shield_io(34) <= gpio_out(22) when gpio_dir(22) = '1' else 'Z';
shield_io(35) <= gpio_out(23) when gpio_dir(23) = '1' else 'Z';
shield_io(36) <= gpio_out(24) when gpio_dir(24) = '1' else 'Z';
shield_io(37) <= gpio_out(25) when gpio_dir(25) = '1' else 'Z';
shield_io(38) <= gpio_out(26) when gpio_dir(26) = '1' else 'Z';
shield_io(39) <= gpio_out(27) when gpio_dir(27) = '1' else 'Z';
shield_io(40) <= gpio_out(28) when gpio_dir(28) = '1' else 'Z';
shield_io(41) <= gpio_out(29) when gpio_dir(29) = '1' else 'Z';
shield_io(43) <= gpio_out(30) when gpio_dir(30) = '1' else 'Z';
shield_io(44) <= gpio_out(31) when gpio_dir(31) = '1' else 'Z';

end architecture behaviour;

99
gpio.vhdl
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@ -0,0 +1,99 @@
-- GPIO module for microwatt
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;

library work;
use work.wishbone_types.all;

entity gpio is
generic (
NGPIO : integer := 32
);
port (
clk : in std_ulogic;
rst : in std_ulogic;

-- Wishbone
wb_in : in wb_io_master_out;
wb_out : out wb_io_slave_out;

-- GPIO lines
gpio_in : in std_ulogic_vector(NGPIO - 1 downto 0);
gpio_out : out std_ulogic_vector(NGPIO - 1 downto 0);
-- 1 = output, 0 = input
gpio_dir : out std_ulogic_vector(NGPIO - 1 downto 0);

-- Interrupt
intr : out std_ulogic
);
end entity gpio;

architecture behaviour of gpio is
constant GPIO_REG_BITS : positive := 5;

-- Register addresses, matching addr downto 2, so 4 bytes per reg
constant GPIO_REG_DATA_OUT : std_ulogic_vector(GPIO_REG_BITS-1 downto 0) := "00000";
constant GPIO_REG_DATA_IN : std_ulogic_vector(GPIO_REG_BITS-1 downto 0) := "00001";
constant GPIO_REG_DIR : std_ulogic_vector(GPIO_REG_BITS-1 downto 0) := "00010";
constant GPIO_REG_DATA_SET : std_ulogic_vector(GPIO_REG_BITS-1 downto 0) := "00100";
constant GPIO_REG_DATA_CLR : std_ulogic_vector(GPIO_REG_BITS-1 downto 0) := "00101";

-- Current output value and direction
signal reg_data : std_ulogic_vector(NGPIO - 1 downto 0) := (others => '0');
signal reg_dirn : std_ulogic_vector(NGPIO - 1 downto 0) := (others => '0');
signal reg_in1 : std_ulogic_vector(NGPIO - 1 downto 0);
signal reg_in2 : std_ulogic_vector(NGPIO - 1 downto 0);

signal wb_rsp : wb_io_slave_out;
signal reg_out : std_ulogic_vector(NGPIO - 1 downto 0);

begin

-- No interrupt facility for now
intr <= '0';

gpio_out <= reg_data;
gpio_dir <= reg_dirn;

-- Wishbone response
wb_rsp.ack <= wb_in.cyc and wb_in.stb;
with wb_in.adr(GPIO_REG_BITS + 1 downto 2) select reg_out <=
reg_data when GPIO_REG_DATA_OUT,
reg_in2 when GPIO_REG_DATA_IN,
reg_dirn when GPIO_REG_DIR,
(others => '0') when others;
wb_rsp.dat(wb_rsp.dat'left downto NGPIO) <= (others => '0');
wb_rsp.dat(NGPIO - 1 downto 0) <= reg_out;
wb_rsp.stall <= '0';

regs_rw: process(clk)
begin
if rising_edge(clk) then
wb_out <= wb_rsp;
reg_in2 <= reg_in1;
reg_in1 <= gpio_in;
if rst = '1' then
reg_data <= (others => '0');
reg_dirn <= (others => '0');
wb_out.ack <= '0';
else
if wb_in.cyc = '1' and wb_in.stb = '1' and wb_in.we = '1' then
case wb_in.adr(GPIO_REG_BITS + 1 downto 2) is
when GPIO_REG_DATA_OUT =>
reg_data <= wb_in.dat(NGPIO - 1 downto 0);
when GPIO_REG_DIR =>
reg_dirn <= wb_in.dat(NGPIO - 1 downto 0);
when GPIO_REG_DATA_SET =>
reg_data <= reg_data or wb_in.dat(NGPIO - 1 downto 0);
when GPIO_REG_DATA_CLR =>
reg_data <= reg_data and not wb_in.dat(NGPIO - 1 downto 0);
when others =>
end case;
end if;
end if;
end if;
end process;

end architecture behaviour;

1
microwatt.core
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@ -44,6 +44,7 @@ filesets:
- wishbone_bram_wrapper.vhdl
- soc.vhdl
- xics.vhdl
- gpio.vhdl
- syscon.vhdl
- sync_fifo.vhdl
- spi_rxtx.vhdl

41
soc.vhdl
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@ -24,6 +24,7 @@ use work.wishbone_types.all;
-- 0xc0004000: XICS ICP
-- 0xc0005000: XICS ICS
-- 0xc0006000: SPI Flash controller
-- 0xc0007000: GPIO controller
-- 0xc8nnnnnn: External IO bus
-- 0xf0000000: Flash "ROM" mapping
-- 0xff000000: DRAM init code (if any) or flash ROM (**)
@ -48,6 +49,7 @@ use work.wishbone_types.all;
-- 1 : Ethernet
-- 2 : UART1
-- 3 : SD card
-- 4 : GPIO

entity soc is
generic (
@ -78,7 +80,8 @@ entity soc is
DCACHE_NUM_WAYS : natural := 2;
DCACHE_TLB_SET_SIZE : natural := 64;
DCACHE_TLB_NUM_WAYS : natural := 2;
HAS_SD_CARD : boolean := false
HAS_SD_CARD : boolean := false;
NGPIO : natural := 0
);
port(
rst : in std_ulogic;
@ -119,6 +122,11 @@ entity soc is
spi_flash_sdat_oe : out std_ulogic_vector(SPI_FLASH_DLINES-1 downto 0);
spi_flash_sdat_i : in std_ulogic_vector(SPI_FLASH_DLINES-1 downto 0) := (others => '1');

-- GPIO signals
gpio_out : out std_ulogic_vector(NGPIO - 1 downto 0);
gpio_dir : out std_ulogic_vector(NGPIO - 1 downto 0);
gpio_in : in std_ulogic_vector(NGPIO - 1 downto 0) := (others => '0');

-- DRAM controller signals
alt_reset : in std_ulogic := '0'
);
@ -186,6 +194,11 @@ architecture behaviour of soc is
signal ics_to_icp : ics_to_icp_t;
signal core_ext_irq : std_ulogic;

-- GPIO signals:
signal wb_gpio_in : wb_io_master_out;
signal wb_gpio_out : wb_io_slave_out;
signal gpio_intr : std_ulogic := '0';

-- Main memory signals:
signal wb_bram_in : wishbone_master_out;
signal wb_bram_out : wishbone_slave_out;
@ -211,6 +224,7 @@ architecture behaviour of soc is
signal rst_uart : std_ulogic := '1';
signal rst_xics : std_ulogic := '1';
signal rst_spi : std_ulogic := '1';
signal rst_gpio : std_ulogic := '1';
signal rst_bram : std_ulogic := '1';
signal rst_dtm : std_ulogic := '1';
signal rst_wbar : std_ulogic := '1';
@ -225,6 +239,7 @@ architecture behaviour of soc is
SLAVE_IO_UART1,
SLAVE_IO_SPI_FLASH_REG,
SLAVE_IO_SPI_FLASH_MAP,
SLAVE_IO_GPIO,
SLAVE_IO_EXTERNAL,
SLAVE_IO_NONE);
signal slave_io_dbg : slave_io_type;
@ -294,6 +309,7 @@ begin
rst_uart <= rst;
rst_spi <= rst;
rst_xics <= rst;
rst_gpio <= rst;
rst_bram <= rst;
rst_dtm <= rst;
rst_wbar <= rst;
@ -603,6 +619,8 @@ begin
slave_io := SLAVE_IO_ICS;
elsif std_match(match, x"C0006") then
slave_io := SLAVE_IO_SPI_FLASH_REG;
elsif std_match(match, x"C0007") then
slave_io := SLAVE_IO_GPIO;
end if;
slave_io_dbg <= slave_io;
wb_uart0_in <= wb_sio_out;
@ -613,6 +631,8 @@ begin
wb_spiflash_in.cyc <= '0';
wb_spiflash_is_reg <= '0';
wb_spiflash_is_map <= '0';
wb_gpio_in <= wb_sio_out;
wb_gpio_in.cyc <= '0';

-- Only give xics 8 bits of wb addr (for now...)
wb_xics_icp_in <= wb_sio_out;
@ -696,6 +716,9 @@ begin
wb_spiflash_in.cyc <= wb_sio_out.cyc;
wb_sio_in <= wb_spiflash_out;
wb_spiflash_is_reg <= '1';
when SLAVE_IO_GPIO =>
wb_gpio_in.cyc <= wb_sio_out.cyc;
wb_sio_in <= wb_gpio_out;
when others =>
end case;

@ -890,6 +913,21 @@ begin
icp_out => ics_to_icp
);

gpio : entity work.gpio
generic map(
NGPIO => NGPIO
)
port map(
clk => system_clk,
rst => rst_gpio,
wb_in => wb_gpio_in,
wb_out => wb_gpio_out,
gpio_in => gpio_in,
gpio_out => gpio_out,
gpio_dir => gpio_dir,
intr => gpio_intr
);

-- Assign external interrupts
interrupts: process(all)
begin
@ -898,6 +936,7 @@ begin
int_level_in(1) <= ext_irq_eth;
int_level_in(2) <= uart1_irq;
int_level_in(3) <= ext_irq_sdcard;
int_level_in(4) <= gpio_intr;
end process;

-- BRAM Memory slave

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