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entity neorv32_sysinfo is
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entity neorv32_sysinfo is
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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_EN : boolean := true; -- implement processor-internal bootloader?
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INT_BOOTLOADER_EN : boolean := true; -- boot configuration: true = boot explicit bootloader; false = boot from int/ext (I)MEM
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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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-- Internal Instruction memory --
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-- Internal Instruction memory --
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MEM_INT_IMEM_EN : boolean := true; -- implement processor-internal instruction memory
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MEM_INT_IMEM_EN : 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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-- Internal Data memory --
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-- Internal Data memory --
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MEM_INT_DMEM_EN : boolean := true; -- implement processor-internal data memory
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MEM_INT_DMEM_EN : 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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-- Internal Cache memory --
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-- Internal Cache memory --
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ICACHE_EN : boolean := true; -- implement instruction cache
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ICACHE_EN : boolean := true; -- implement instruction cache
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IO_TWI_EN : boolean := true; -- implement two-wire interface (TWI)?
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IO_TWI_EN : boolean := true; -- implement two-wire interface (TWI)?
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IO_PWM_NUM_CH : natural := 4; -- number of PWM channels to implement
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IO_PWM_NUM_CH : natural := 4; -- number of PWM channels to implement
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IO_WDT_EN : boolean := true; -- implement watch dog timer (WDT)?
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IO_WDT_EN : boolean := true; -- implement watch dog timer (WDT)?
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IO_TRNG_EN : boolean := true; -- implement true random number generator (TRNG)?
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IO_TRNG_EN : boolean := true; -- implement true random number generator (TRNG)?
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IO_CFS_EN : boolean := true; -- implement custom functions subsystem (CFS)?
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IO_CFS_EN : boolean := true; -- implement custom functions subsystem (CFS)?
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IO_NCO_EN : boolean := true; -- implement numerically-controlled oscillator (NCO)?
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IO_SLINK_EN : boolean := true; -- implement stream link interface?
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IO_NEOLED_EN : boolean := true -- implement NeoPixel-compatible smart LED interface (NEOLED)?
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IO_NEOLED_EN : boolean := true; -- implement NeoPixel-compatible smart LED interface (NEOLED)?
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IO_XIRQ_NUM_CH : natural := 32 -- number of external interrupt (XIRQ) channels to implement
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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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-- SYSINFO(1): Custom user code/ID --
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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_EN); -- processor-internal bootloader implemented?
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sysinfo_mem(2)(00) <= bool_to_ulogic_f(INT_BOOTLOADER_EN); -- processor-internal bootloader implemented?
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sysinfo_mem(2)(01) <= bool_to_ulogic_f(MEM_EXT_EN); -- external memory bus interface implemented?
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sysinfo_mem(2)(01) <= bool_to_ulogic_f(MEM_EXT_EN); -- external memory bus interface implemented?
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sysinfo_mem(2)(02) <= bool_to_ulogic_f(MEM_INT_IMEM_EN); -- processor-internal instruction memory implemented?
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sysinfo_mem(2)(02) <= bool_to_ulogic_f(MEM_INT_IMEM_EN); -- processor-internal instruction memory implemented?
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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)(03) <= bool_to_ulogic_f(MEM_INT_DMEM_EN); -- processor-internal data memory implemented?
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sysinfo_mem(2)(04) <= bool_to_ulogic_f(MEM_INT_DMEM_EN); -- processor-internal data memory implemented?
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sysinfo_mem(2)(04) <= bool_to_ulogic_f(wb_big_endian_c); -- is external memory bus interface using BIG-endian byte-order?
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sysinfo_mem(2)(05) <= bool_to_ulogic_f(xbus_big_endian_c); -- is external memory bus interface using BIG-endian byte-order?
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sysinfo_mem(2)(05) <= bool_to_ulogic_f(ICACHE_EN); -- processor-internal instruction cache implemented?
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sysinfo_mem(2)(06) <= bool_to_ulogic_f(ICACHE_EN); -- processor-internal instruction cache implemented?
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--
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--
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sysinfo_mem(2)(13 downto 07) <= (others => '0'); -- reserved
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sysinfo_mem(2)(13 downto 06) <= (others => '0'); -- reserved
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-- Misc --
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-- Misc --
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sysinfo_mem(2)(14) <= bool_to_ulogic_f(ON_CHIP_DEBUGGER_EN); -- on-chip debugger implemented?
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sysinfo_mem(2)(14) <= bool_to_ulogic_f(ON_CHIP_DEBUGGER_EN); -- on-chip debugger implemented?
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sysinfo_mem(2)(15) <= bool_to_ulogic_f(dedicated_reset_c); -- dedicated hardware reset of all core registers?
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sysinfo_mem(2)(15) <= bool_to_ulogic_f(dedicated_reset_c); -- dedicated hardware reset of all core registers?
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-- IO --
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-- IO --
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sysinfo_mem(2)(16) <= bool_to_ulogic_f(IO_GPIO_EN); -- general purpose input/output port unit (GPIO) implemented?
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sysinfo_mem(2)(16) <= bool_to_ulogic_f(IO_GPIO_EN); -- general purpose input/output port unit (GPIO) implemented?
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sysinfo_mem(2)(20) <= bool_to_ulogic_f(IO_TWI_EN); -- two-wire interface (TWI) implemented?
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sysinfo_mem(2)(20) <= bool_to_ulogic_f(IO_TWI_EN); -- two-wire interface (TWI) implemented?
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sysinfo_mem(2)(21) <= bool_to_ulogic_f(boolean(IO_PWM_NUM_CH > 0)); -- pulse-width modulation unit (PWM) implemented?
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sysinfo_mem(2)(21) <= bool_to_ulogic_f(boolean(IO_PWM_NUM_CH > 0)); -- pulse-width modulation unit (PWM) implemented?
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sysinfo_mem(2)(22) <= bool_to_ulogic_f(IO_WDT_EN); -- watch dog timer (WDT) implemented?
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sysinfo_mem(2)(22) <= bool_to_ulogic_f(IO_WDT_EN); -- watch dog timer (WDT) implemented?
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sysinfo_mem(2)(23) <= bool_to_ulogic_f(IO_CFS_EN); -- custom functions subsystem (CFS) implemented?
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sysinfo_mem(2)(23) <= bool_to_ulogic_f(IO_CFS_EN); -- custom functions subsystem (CFS) implemented?
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sysinfo_mem(2)(24) <= bool_to_ulogic_f(IO_TRNG_EN); -- true random number generator (TRNG) implemented?
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sysinfo_mem(2)(24) <= bool_to_ulogic_f(IO_TRNG_EN); -- true random number generator (TRNG) implemented?
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sysinfo_mem(2)(25) <= bool_to_ulogic_f(IO_NCO_EN); -- numerically-controlled oscillator (NCO) implemented?
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sysinfo_mem(2)(25) <= bool_to_ulogic_f(IO_SLINK_EN); -- stream links (SLINK) implemented?
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sysinfo_mem(2)(26) <= bool_to_ulogic_f(IO_UART1_EN); -- secondary universal asynchronous receiver/transmitter (UART1) implemented?
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sysinfo_mem(2)(26) <= bool_to_ulogic_f(IO_UART1_EN); -- secondary universal asynchronous receiver/transmitter (UART1) implemented?
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sysinfo_mem(2)(27) <= bool_to_ulogic_f(IO_NEOLED_EN); -- NeoPixel-compatible smart LED interface (NEOLED) implemented?
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sysinfo_mem(2)(27) <= bool_to_ulogic_f(IO_NEOLED_EN); -- NeoPixel-compatible smart LED interface (NEOLED) implemented?
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sysinfo_mem(2)(28) <= bool_to_ulogic_f(boolean(IO_XIRQ_NUM_CH > 0)); -- external interrupt controller (XIRQ) implemented?
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--
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--
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sysinfo_mem(2)(31 downto 28) <= (others => '0'); -- reserved
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sysinfo_mem(2)(31 downto 29) <= (others => '0'); -- reserved
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-- SYSINFO(3): Cache configuration --
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-- SYSINFO(3): Cache configuration --
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sysinfo_mem(3)(03 downto 00) <= std_ulogic_vector(to_unsigned(index_size_f(ICACHE_BLOCK_SIZE), 4)) when (ICACHE_EN = true) else (others => '0'); -- i-cache: log2(block_size_in_bytes)
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sysinfo_mem(3)(03 downto 00) <= std_ulogic_vector(to_unsigned(index_size_f(ICACHE_BLOCK_SIZE), 4)) when (ICACHE_EN = true) else (others => '0'); -- i-cache: log2(block_size_in_bytes)
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sysinfo_mem(3)(07 downto 04) <= std_ulogic_vector(to_unsigned(index_size_f(ICACHE_NUM_BLOCKS), 4)) when (ICACHE_EN = true) else (others => '0'); -- i-cache: log2(number_of_block)
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sysinfo_mem(3)(07 downto 04) <= std_ulogic_vector(to_unsigned(index_size_f(ICACHE_NUM_BLOCKS), 4)) when (ICACHE_EN = true) else (others => '0'); -- i-cache: log2(number_of_block)
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sysinfo_mem(3)(11 downto 08) <= std_ulogic_vector(to_unsigned(index_size_f(ICACHE_ASSOCIATIVITY), 4)) when (ICACHE_EN = true) else (others => '0'); -- i-cache: log2(associativity)
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sysinfo_mem(3)(11 downto 08) <= std_ulogic_vector(to_unsigned(index_size_f(ICACHE_ASSOCIATIVITY), 4)) when (ICACHE_EN = true) else (others => '0'); -- i-cache: log2(associativity)
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