| Line 116... |
Line 116... |
rdat : std_ulogic_vector(31 downto 0);
|
rdat : std_ulogic_vector(31 downto 0);
|
sel : std_ulogic_vector(03 downto 0);
|
sel : std_ulogic_vector(03 downto 0);
|
ack : std_ulogic;
|
ack : std_ulogic;
|
err : std_ulogic;
|
err : std_ulogic;
|
tmo : std_ulogic;
|
tmo : std_ulogic;
|
timeout : std_ulogic_vector(index_size_f(BUS_TIMEOUT)-1 downto 0);
|
timeout : std_ulogic_vector(index_size_f(BUS_TIMEOUT) downto 0);
|
src : std_ulogic;
|
src : std_ulogic;
|
lock : std_ulogic;
|
lock : std_ulogic;
|
priv : std_ulogic_vector(01 downto 0);
|
priv : std_ulogic_vector(01 downto 0);
|
end record;
|
end record;
|
signal ctrl : ctrl_t;
|
signal ctrl : ctrl_t;
|
| Line 140... |
Line 140... |
assert not (PIPE_MODE = false) report "NEORV32 PROCESSOR CONFIG NOTE: External Bus Interface - Implementing STANDARD Wishbone protocol." severity note;
|
assert not (PIPE_MODE = false) report "NEORV32 PROCESSOR CONFIG NOTE: External Bus Interface - Implementing STANDARD Wishbone protocol." severity note;
|
assert not (PIPE_MODE = true) report "NEORV32 PROCESSOR CONFIG NOTE: External Bus Interface - Implementing PIEPLINED Wishbone protocol." severity note;
|
assert not (PIPE_MODE = true) report "NEORV32 PROCESSOR CONFIG NOTE: External Bus Interface - Implementing PIEPLINED Wishbone protocol." severity note;
|
|
|
-- bus timeout --
|
-- bus timeout --
|
assert not (BUS_TIMEOUT /= 0) report "NEORV32 PROCESSOR CONFIG NOTE: External Bus Interface - Implementing auto-timeout (" & integer'image(BUS_TIMEOUT) & " cycles)." severity note;
|
assert not (BUS_TIMEOUT /= 0) report "NEORV32 PROCESSOR CONFIG NOTE: External Bus Interface - Implementing auto-timeout (" & integer'image(BUS_TIMEOUT) & " cycles)." severity note;
|
assert not (BUS_TIMEOUT = 0) report "NEORV32 PROCESSOR CONFIG NOTE: External Bus Interface - Implementing no auto-timeout (can cause permanent CPU stall!)." severity note;
|
assert not (BUS_TIMEOUT = 0) report "NEORV32 PROCESSOR CONFIG WARNING: External Bus Interface - Implementing NO auto-timeout (can cause permanent CPU stall!)." severity warning;
|
|
|
-- endianness --
|
-- endianness --
|
assert not (BIG_ENDIAN = false) report "NEORV32 PROCESSOR CONFIG NOTE: External Bus Interface - Implementing LITTLE-endian byte order." severity note;
|
assert not (BIG_ENDIAN = false) report "NEORV32 PROCESSOR CONFIG NOTE: External Bus Interface - Implementing LITTLE-endian byte order." severity note;
|
assert not (BIG_ENDIAN = true) report "NEORV32 PROCESSOR CONFIG NOTE: External Bus Interface - Implementing BIG-endian byte." severity note;
|
assert not (BIG_ENDIAN = true) report "NEORV32 PROCESSOR CONFIG NOTE: External Bus Interface - Implementing BIG-endian byte." severity note;
|
|
|
| Line 188... |
Line 188... |
ctrl.state_ff <= ctrl.state;
|
ctrl.state_ff <= ctrl.state;
|
ctrl.rdat <= (others => '0'); -- required for internal output gating
|
ctrl.rdat <= (others => '0'); -- required for internal output gating
|
ctrl.ack <= '0';
|
ctrl.ack <= '0';
|
ctrl.err <= '0';
|
ctrl.err <= '0';
|
ctrl.tmo <= '0';
|
ctrl.tmo <= '0';
|
ctrl.timeout <= std_ulogic_vector(to_unsigned(BUS_TIMEOUT, index_size_f(BUS_TIMEOUT)));
|
ctrl.timeout <= std_ulogic_vector(to_unsigned(BUS_TIMEOUT, index_size_f(BUS_TIMEOUT)+1));
|
|
|
-- state machine --
|
-- state machine --
|
case ctrl.state is
|
case ctrl.state is
|
|
|
when IDLE => -- waiting for host request
|
when IDLE => -- waiting for host request
|
