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microwatt/wishbone_types.vhdl

55 lines
2.0 KiB
VHDL

library ieee;
use ieee.std_logic_1164.all;
package wishbone_types is
--
-- Main CPU bus. 32-bit address, 64-bit data
--
constant wishbone_addr_bits : integer := 32;
constant wishbone_data_bits : integer := 64;
constant wishbone_sel_bits : integer := wishbone_data_bits/8;
subtype wishbone_addr_type is std_ulogic_vector(wishbone_addr_bits-1 downto 0);
subtype wishbone_data_type is std_ulogic_vector(wishbone_data_bits-1 downto 0);
subtype wishbone_sel_type is std_ulogic_vector(wishbone_sel_bits-1 downto 0);
type wishbone_master_out is record
adr : wishbone_addr_type;
dat : wishbone_data_type;
sel : wishbone_sel_type;
cyc : std_ulogic;
stb : std_ulogic;
we : std_ulogic;
end record;
constant wishbone_master_out_init : wishbone_master_out := (adr => (others => '0'), dat => (others => '0'), cyc => '0', stb => '0', sel => (others => '0'), we => '0');
type wishbone_slave_out is record
dat : wishbone_data_type;
ack : std_ulogic;
stall : std_ulogic;
end record;
constant wishbone_slave_out_init : wishbone_slave_out := (ack => '0', stall => '0', others => (others => '0'));
type wishbone_master_out_vector is array (natural range <>) of wishbone_master_out;
type wishbone_slave_out_vector is array (natural range <>) of wishbone_slave_out;
--
-- IO Bus to a device, 30-bit address, 32-bits data
--
type wb_io_master_out is record
adr : std_ulogic_vector(29 downto 0);
dat : std_ulogic_vector(31 downto 0);
sel : std_ulogic_vector(3 downto 0);
cyc : std_ulogic;
stb : std_ulogic;
we : std_ulogic;
end record;
type wb_io_slave_out is record
dat : std_ulogic_vector(31 downto 0);
ack : std_ulogic;
stall : std_ulogic;
end record;
constant wb_io_slave_out_init : wb_io_slave_out := (ack => '0', stall => '0', others => (others => '0'));
end package wishbone_types;