| Line 214... |
Line 214... |
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-- External platform interrupts (available if XIRQ_NUM_CH > 0) --
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-- External platform interrupts (available if XIRQ_NUM_CH > 0) --
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xirq_i : in std_ulogic_vector(XIRQ_NUM_CH-1 downto 0) := (others => 'L'); -- IRQ channels
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xirq_i : in std_ulogic_vector(XIRQ_NUM_CH-1 downto 0) := (others => 'L'); -- IRQ channels
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-- CPU interrupts --
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-- CPU interrupts --
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nm_irq_i : in std_ulogic := 'L'; -- non-maskable interrupt
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mtime_irq_i : in std_ulogic := 'L'; -- machine timer interrupt, available if IO_MTIME_EN = false
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mtime_irq_i : in std_ulogic := 'L'; -- machine timer interrupt, available if IO_MTIME_EN = false
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msw_irq_i : in std_ulogic := 'L'; -- machine software interrupt
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msw_irq_i : in std_ulogic := 'L'; -- machine software interrupt
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mext_irq_i : in std_ulogic := 'L' -- machine external interrupt
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mext_irq_i : in std_ulogic := 'L' -- machine external interrupt
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);
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);
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end neorv32_top;
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end neorv32_top;
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| Line 327... |
Line 326... |
signal neoled_irq : std_ulogic;
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signal neoled_irq : std_ulogic;
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signal slink_tx_irq : std_ulogic;
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signal slink_tx_irq : std_ulogic;
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signal slink_rx_irq : std_ulogic;
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signal slink_rx_irq : std_ulogic;
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signal xirq_irq : std_ulogic;
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signal xirq_irq : std_ulogic;
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-- machine (CPU) interrupts --
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signal x_nm_irq, nm_irq_ff : std_ulogic;
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signal x_mtime_irq, mtime_irq_ff : std_ulogic;
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signal x_msw_irq, msw_irq_ff : std_ulogic;
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signal x_mext_irq, mext_irq_ff : std_ulogic;
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-- misc --
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-- misc --
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signal mtime_time : std_ulogic_vector(63 downto 0); -- current system time from MTIME
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signal mtime_time : std_ulogic_vector(63 downto 0); -- current system time from MTIME
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signal cpu_sleep : std_ulogic; -- CPU is in sleep mode when set
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signal cpu_sleep : std_ulogic; -- CPU is in sleep mode when set
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signal bus_keeper_err : std_ulogic; -- bus keeper: bus access timeout
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signal bus_keeper_err : std_ulogic; -- bus keeper: bus access timeout
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| Line 512... |
Line 505... |
d_bus_fence_o => cpu_d.fence, -- executed FENCE operation
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d_bus_fence_o => cpu_d.fence, -- executed FENCE operation
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d_bus_priv_o => cpu_d.priv, -- privilege level
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d_bus_priv_o => cpu_d.priv, -- privilege level
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-- system time input from MTIME --
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-- system time input from MTIME --
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time_i => mtime_time, -- current system time
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time_i => mtime_time, -- current system time
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-- non-maskable interrupt --
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-- non-maskable interrupt --
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nm_irq_i => x_nm_irq, -- NMI
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msw_irq_i => msw_irq_i, -- machine software interrupt
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msw_irq_i => x_msw_irq, -- machine software interrupt
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mext_irq_i => mext_irq_i, -- machine external interrupt request
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mext_irq_i => x_mext_irq, -- machine external interrupt request
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mtime_irq_i => mtime_irq, -- machine timer interrupt
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mtime_irq_i => mtime_irq, -- machine timer interrupt
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-- fast interrupts (custom) --
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-- fast interrupts (custom) --
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firq_i => fast_irq, -- fast interrupt trigger
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firq_i => fast_irq, -- fast interrupt trigger
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-- debug mode (halt) request --
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-- debug mode (halt) request --
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db_halt_req_i => dci_halt_req
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db_halt_req_i => dci_halt_req
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| Line 530... |
Line 522... |
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-- advanced memory control --
|
-- advanced memory control --
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fence_o <= cpu_d.fence; -- indicates an executed FENCE operation
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fence_o <= cpu_d.fence; -- indicates an executed FENCE operation
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fencei_o <= cpu_i.fence; -- indicates an executed FENCEI operation
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fencei_o <= cpu_i.fence; -- indicates an executed FENCEI operation
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|
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-- external machine-level (CPU) interrupts --
|
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nm_irq_ff <= nm_irq_i when rising_edge(clk_i);
|
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mtime_irq_ff <= mtime_irq_i when rising_edge(clk_i);
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msw_irq_ff <= msw_irq_i when rising_edge(clk_i);
|
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mext_irq_ff <= mext_irq_i when rising_edge(clk_i);
|
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-- rising-edge detector --
|
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x_nm_irq <= nm_irq_i and (not nm_irq_ff);
|
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x_mtime_irq <= mtime_irq_i and (not mtime_irq_ff);
|
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x_msw_irq <= msw_irq_i and (not msw_irq_ff);
|
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x_mext_irq <= mext_irq_i and (not mext_irq_ff);
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|
|
|
-- fast interrupts --
|
-- fast interrupts --
|
fast_irq(00) <= wdt_irq; -- HIGHEST PRIORITY - watchdog timeout
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fast_irq(00) <= wdt_irq; -- HIGHEST PRIORITY - watchdog timeout
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fast_irq(01) <= cfs_irq; -- custom functions subsystem
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fast_irq(01) <= cfs_irq; -- custom functions subsystem
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fast_irq(02) <= uart0_rxd_irq; -- primary UART (UART0) data received
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fast_irq(02) <= uart0_rxd_irq; -- primary UART (UART0) data received
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fast_irq(03) <= uart0_txd_irq; -- primary UART (UART0) sending done
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fast_irq(03) <= uart0_txd_irq; -- primary UART (UART0) sending done
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| Line 993... |
Line 974... |
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neorv32_mtime_inst_false:
|
neorv32_mtime_inst_false:
|
if (IO_MTIME_EN = false) generate
|
if (IO_MTIME_EN = false) generate
|
resp_bus(RESP_MTIME) <= resp_bus_entry_terminate_c;
|
resp_bus(RESP_MTIME) <= resp_bus_entry_terminate_c;
|
mtime_time <= mtime_i; -- use external machine timer time signal
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mtime_time <= mtime_i; -- use external machine timer time signal
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mtime_irq <= x_mtime_irq; -- use external machine timer interrupt
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mtime_irq <= mtime_irq_i; -- use external machine timer interrupt
|
end generate;
|
end generate;
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|
|
|
|
-- system time output LO --
|
-- system time output LO --
|
mtime_sync: process(clk_i)
|
mtime_sync: process(clk_i)
|
