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Line 46... |
generic (
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generic (
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-- General --
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-- General --
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CLOCK_FREQUENCY : natural := 0; -- clock frequency of clk_i in Hz
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CLOCK_FREQUENCY : natural := 0; -- clock frequency of clk_i in Hz
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BOOTLOADER_USE : boolean := true; -- implement processor-internal bootloader?
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BOOTLOADER_USE : boolean := true; -- implement processor-internal bootloader?
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USER_CODE : std_ulogic_vector(31 downto 0) := x"00000000"; -- custom user code
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USER_CODE : std_ulogic_vector(31 downto 0) := x"00000000"; -- custom user code
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-- Memory configuration: Instruction memory --
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-- Internal Instruction memory --
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MEM_ISPACE_BASE : std_ulogic_vector(31 downto 0) := x"00000000"; -- base address of instruction memory space
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MEM_ISPACE_SIZE : natural := 8*1024; -- total size of instruction memory space in byte
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MEM_INT_IMEM_USE : boolean := true; -- implement processor-internal instruction memory
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MEM_INT_IMEM_USE : boolean := true; -- implement processor-internal instruction memory
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MEM_INT_IMEM_SIZE : natural := 8*1024; -- size of processor-internal instruction memory in bytes
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MEM_INT_IMEM_SIZE : natural := 8*1024; -- size of processor-internal instruction memory in bytes
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MEM_INT_IMEM_ROM : boolean := false; -- implement processor-internal instruction memory as ROM
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MEM_INT_IMEM_ROM : boolean := false; -- implement processor-internal instruction memory as ROM
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-- Memory configuration: Data memory --
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-- Internal Data memory --
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MEM_DSPACE_BASE : std_ulogic_vector(31 downto 0) := x"80000000"; -- base address of data memory space
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MEM_DSPACE_SIZE : natural := 4*1024; -- total size of data memory space in byte
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MEM_INT_DMEM_USE : boolean := true; -- implement processor-internal data memory
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MEM_INT_DMEM_USE : boolean := true; -- implement processor-internal data memory
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MEM_INT_DMEM_SIZE : natural := 4*1024; -- size of processor-internal data memory in bytes
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MEM_INT_DMEM_SIZE : natural := 4*1024; -- size of processor-internal data memory in bytes
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-- Memory configuration: External memory interface --
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-- External memory interface --
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MEM_EXT_USE : boolean := false; -- implement external memory bus interface?
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MEM_EXT_USE : boolean := false; -- implement external memory bus interface?
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-- Processor peripherals --
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-- Processor peripherals --
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IO_GPIO_USE : boolean := true; -- implement general purpose input/output port unit (GPIO)?
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IO_GPIO_USE : boolean := true; -- implement general purpose input/output port unit (GPIO)?
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IO_MTIME_USE : boolean := true; -- implement machine system timer (MTIME)?
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IO_MTIME_USE : boolean := true; -- implement machine system timer (MTIME)?
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IO_UART_USE : boolean := true; -- implement universal asynchronous receiver/transmitter (UART)?
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IO_UART_USE : boolean := true; -- implement universal asynchronous receiver/transmitter (UART)?
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IO_SPI_USE : boolean := true; -- implement serial peripheral interface (SPI)?
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IO_SPI_USE : boolean := true; -- implement serial peripheral interface (SPI)?
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IO_TWI_USE : boolean := true; -- implement two-wire interface (TWI)?
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IO_TWI_USE : boolean := true; -- implement two-wire interface (TWI)?
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IO_PWM_USE : boolean := true; -- implement pulse-width modulation unit (PWM)?
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IO_PWM_USE : boolean := true; -- implement pulse-width modulation unit (PWM)?
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IO_WDT_USE : boolean := true; -- implement watch dog timer (WDT)?
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IO_WDT_USE : boolean := true; -- implement watch dog timer (WDT)?
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IO_TRNG_USE : boolean := true; -- implement true random number generator (TRNG)?
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IO_TRNG_USE : boolean := true; -- implement true random number generator (TRNG)?
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IO_DEVNULL_USE : boolean := true -- implement dummy device (DEVNULL)?
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IO_DEVNULL_USE : boolean := true; -- implement dummy device (DEVNULL)?
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IO_CFU_USE : boolean := true -- implement custom functions unit (CFU)?
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);
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);
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port (
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port (
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-- host access --
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-- host access --
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clk_i : in std_ulogic; -- global clock line
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clk_i : in std_ulogic; -- global clock line
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addr_i : in std_ulogic_vector(31 downto 0); -- address
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addr_i : in std_ulogic_vector(31 downto 0); -- address
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Line 109... |
-- -------------------------------------------------------------------------------------------
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-- -------------------------------------------------------------------------------------------
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-- SYSINFO(0): Processor (primary) clock frequency --
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-- SYSINFO(0): Processor (primary) clock frequency --
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sysinfo_mem(0) <= std_ulogic_vector(to_unsigned(CLOCK_FREQUENCY, 32));
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sysinfo_mem(0) <= std_ulogic_vector(to_unsigned(CLOCK_FREQUENCY, 32));
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-- SYSINFO(1): Custom user code --
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-- SYSINFO(1): Custom user code/ID --
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sysinfo_mem(1) <= USER_CODE;
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sysinfo_mem(1) <= USER_CODE;
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-- SYSINFO(2): Implemented processor devices/features --
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-- SYSINFO(2): Implemented processor devices/features --
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-- Memory
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-- Memory --
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sysinfo_mem(2)(00) <= bool_to_ulogic_f(BOOTLOADER_USE); -- implement processor-internal bootloader?
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sysinfo_mem(2)(00) <= bool_to_ulogic_f(BOOTLOADER_USE); -- processor-internal bootloader implemented?
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sysinfo_mem(2)(01) <= bool_to_ulogic_f(MEM_EXT_USE); -- implement external memory bus interface?
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sysinfo_mem(2)(01) <= bool_to_ulogic_f(MEM_EXT_USE); -- external memory bus interface implemented?
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sysinfo_mem(2)(02) <= bool_to_ulogic_f(MEM_INT_IMEM_USE); -- implement processor-internal instruction memory?
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sysinfo_mem(2)(02) <= bool_to_ulogic_f(MEM_INT_IMEM_USE); -- processor-internal instruction memory implemented?
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sysinfo_mem(2)(03) <= bool_to_ulogic_f(MEM_INT_IMEM_ROM); -- implement processor-internal instruction memory as ROM?
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sysinfo_mem(2)(03) <= bool_to_ulogic_f(MEM_INT_IMEM_ROM); -- processor-internal instruction memory implemented as ROM?
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sysinfo_mem(2)(04) <= bool_to_ulogic_f(MEM_INT_DMEM_USE); -- implement processor-internal data memory?
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sysinfo_mem(2)(04) <= bool_to_ulogic_f(MEM_INT_DMEM_USE); -- processor-internal data memory implemented?
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--
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sysinfo_mem(2)(15 downto 05) <= (others => '0'); -- reserved
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sysinfo_mem(2)(15 downto 05) <= (others => '0'); -- reserved
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-- IO
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-- IO --
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sysinfo_mem(2)(16) <= bool_to_ulogic_f(IO_GPIO_USE); -- implement general purpose input/output port unit (GPIO)?
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sysinfo_mem(2)(16) <= bool_to_ulogic_f(IO_GPIO_USE); -- general purpose input/output port unit (GPIO) implemented?
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sysinfo_mem(2)(17) <= bool_to_ulogic_f(IO_MTIME_USE); -- implement machine system timer (MTIME)?
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sysinfo_mem(2)(17) <= bool_to_ulogic_f(IO_MTIME_USE); -- machine system timer (MTIME) implemented?
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sysinfo_mem(2)(18) <= bool_to_ulogic_f(IO_UART_USE); -- implement universal asynchronous receiver/transmitter (UART)?
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sysinfo_mem(2)(18) <= bool_to_ulogic_f(IO_UART_USE); -- universal asynchronous receiver/transmitter (UART) implemented?
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sysinfo_mem(2)(19) <= bool_to_ulogic_f(IO_SPI_USE); -- implement serial peripheral interface (SPI)?
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sysinfo_mem(2)(19) <= bool_to_ulogic_f(IO_SPI_USE); -- serial peripheral interface (SPI) implemented?
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sysinfo_mem(2)(20) <= bool_to_ulogic_f(IO_TWI_USE); -- implement two-wire interface (TWI)?
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sysinfo_mem(2)(20) <= bool_to_ulogic_f(IO_TWI_USE); -- two-wire interface (TWI) implemented?
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sysinfo_mem(2)(21) <= bool_to_ulogic_f(IO_PWM_USE); -- implement pulse-width modulation unit (PWM)?
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sysinfo_mem(2)(21) <= bool_to_ulogic_f(IO_PWM_USE); -- pulse-width modulation unit (PWM) implemented?
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sysinfo_mem(2)(22) <= bool_to_ulogic_f(IO_WDT_USE); -- implement watch dog timer (WDT)?
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sysinfo_mem(2)(22) <= bool_to_ulogic_f(IO_WDT_USE); -- watch dog timer (WDT) implemented?
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sysinfo_mem(2)(23) <= '0';
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sysinfo_mem(2)(23) <= bool_to_ulogic_f(IO_CFU_USE); -- custom functions unit (CFU) implemented?
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sysinfo_mem(2)(24) <= bool_to_ulogic_f(IO_TRNG_USE); -- implement true random number generator (TRNG)?
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sysinfo_mem(2)(24) <= bool_to_ulogic_f(IO_TRNG_USE); -- true random number generator (TRNG) implemented?
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sysinfo_mem(2)(25) <= bool_to_ulogic_f(IO_DEVNULL_USE); -- implement dummy device (DEVNULL)?
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sysinfo_mem(2)(25) <= bool_to_ulogic_f(IO_DEVNULL_USE); -- dummy device (DEVNULL) implemented?
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--
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sysinfo_mem(2)(31 downto 26) <= (others => '0'); -- reserved
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sysinfo_mem(2)(31 downto 26) <= (others => '0'); -- reserved
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-- SYSINFO(3): reserved --
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-- SYSINFO(3): reserved --
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sysinfo_mem(3) <= (others => '0'); -- reserved - maybe for technology-specific configuration options?
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sysinfo_mem(3) <= (others => '0'); -- reserved
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-- SYSINFO(4): Base address of instruction memory space --
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-- SYSINFO(4): Base address of instruction memory space --
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sysinfo_mem(4) <= MEM_ISPACE_BASE;
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sysinfo_mem(4) <= ispace_base_c; -- defined in neorv32_package.vhd file
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-- SYSINFO(5): Base address of data memory space --
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-- SYSINFO(5): Base address of data memory space --
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sysinfo_mem(5) <= MEM_DSPACE_BASE;
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sysinfo_mem(5) <= dspace_base_c; -- defined in neorv32_package.vhd file
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-- SYSINFO(6): Total size of instruction memory space in bytes --
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-- SYSINFO(6): Size of IMEM in bytes --
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sysinfo_mem(6) <= std_ulogic_vector(to_unsigned(MEM_ISPACE_SIZE, 32));
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sysinfo_mem(6) <= std_ulogic_vector(to_unsigned(MEM_INT_IMEM_SIZE, 32)) when (MEM_INT_IMEM_USE = true) else (others => '0');
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-- SYSINFO(7): Total size of data memory space in bytes --
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-- SYSINFO(7): Size of DMEM in bytes --
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sysinfo_mem(7) <= std_ulogic_vector(to_unsigned(MEM_DSPACE_SIZE, 32));
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sysinfo_mem(7) <= std_ulogic_vector(to_unsigned(MEM_INT_DMEM_SIZE, 32)) when (MEM_INT_DMEM_USE = true) else (others => '0');
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-- Read Access ----------------------------------------------------------------------------
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-- Read Access ----------------------------------------------------------------------------
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-- -------------------------------------------------------------------------------------------
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-- -------------------------------------------------------------------------------------------
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read_access: process(clk_i)
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read_access: process(clk_i)
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begin
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begin
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if rising_edge(clk_i) then
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if rising_edge(clk_i) then
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ack_o <= rden;
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ack_o <= rden;
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data_o <= (others => '0');
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if (rden = '1') then
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if (rden = '1') then
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data_o <= sysinfo_mem(to_integer(unsigned(info_addr)));
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data_o <= sysinfo_mem(to_integer(unsigned(info_addr)));
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else
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data_o <= (others => '0');
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end if;
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end if;
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end if;
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end if;
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end process read_access;
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end process read_access;
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