| Line 53... |
Line 53... |
-- User Configuration ---------------------------------------------------------------------
|
-- User Configuration ---------------------------------------------------------------------
|
-- -------------------------------------------------------------------------------------------
|
-- -------------------------------------------------------------------------------------------
|
-- general --
|
-- general --
|
constant ext_imem_c : boolean := false; -- false: use and boot from proc-internal IMEM, true: use and boot from external (initialized) simulated IMEM (ext. mem A)
|
constant ext_imem_c : boolean := false; -- false: use and boot from proc-internal IMEM, true: use and boot from external (initialized) simulated IMEM (ext. mem A)
|
constant ext_dmem_c : boolean := false; -- false: use proc-internal DMEM, true: use external simulated DMEM (ext. mem B)
|
constant ext_dmem_c : boolean := false; -- false: use proc-internal DMEM, true: use external simulated DMEM (ext. mem B)
|
constant icache_use_c : boolean := false; -- set true to use processor-internal instruction cache
|
constant icache_en_c : boolean := false; -- set true to use processor-internal instruction cache
|
constant imem_size_c : natural := 16*1024; -- size in bytes of processor-internal IMEM / external mem A
|
constant imem_size_c : natural := 16*1024; -- size in bytes of processor-internal IMEM / external mem A
|
constant dmem_size_c : natural := 8*1024; -- size in bytes of processor-internal DMEM / external mem B
|
constant dmem_size_c : natural := 8*1024; -- size in bytes of processor-internal DMEM / external mem B
|
constant f_clock_c : natural := 100000000; -- main clock in Hz
|
constant f_clock_c : natural := 100000000; -- main clock in Hz
|
constant baud_rate_c : natural := 19200; -- simulation UART output baudrate
|
constant baud_rate_c : natural := 19200; -- simulation UART output baudrate
|
-- simulated external Wishbone memory A (can be used as external IMEM) --
|
-- simulated external Wishbone memory A (can be used as external IMEM) --
|
| Line 171... |
Line 171... |
-- -------------------------------------------------------------------------------------------
|
-- -------------------------------------------------------------------------------------------
|
neorv32_top_inst: neorv32_top
|
neorv32_top_inst: neorv32_top
|
generic map (
|
generic map (
|
-- General --
|
-- General --
|
CLOCK_FREQUENCY => f_clock_c, -- clock frequency of clk_i in Hz
|
CLOCK_FREQUENCY => f_clock_c, -- clock frequency of clk_i in Hz
|
BOOTLOADER_USE => false, -- implement processor-internal bootloader?
|
BOOTLOADER_EN => false, -- implement processor-internal bootloader?
|
USER_CODE => x"12345678", -- custom user code
|
USER_CODE => x"12345678", -- custom user code
|
HW_THREAD_ID => x"00000000", -- hardware thread id (hartid)
|
HW_THREAD_ID => x"00000000", -- hardware thread id (hartid)
|
-- RISC-V CPU Extensions --
|
-- RISC-V CPU Extensions --
|
CPU_EXTENSION_RISCV_A => true, -- implement atomic extension?
|
CPU_EXTENSION_RISCV_A => true, -- implement atomic extension?
|
|
CPU_EXTENSION_RISCV_B => true, -- implement bit manipulation extensions?
|
CPU_EXTENSION_RISCV_C => true, -- implement compressed extension?
|
CPU_EXTENSION_RISCV_C => true, -- implement compressed extension?
|
CPU_EXTENSION_RISCV_E => false, -- implement embedded RF extension?
|
CPU_EXTENSION_RISCV_E => false, -- implement embedded RF extension?
|
CPU_EXTENSION_RISCV_M => true, -- implement muld/div extension?
|
CPU_EXTENSION_RISCV_M => true, -- implement muld/div extension?
|
CPU_EXTENSION_RISCV_U => true, -- implement user mode extension?
|
CPU_EXTENSION_RISCV_U => true, -- implement user mode extension?
|
CPU_EXTENSION_RISCV_Zicsr => true, -- implement CSR system?
|
CPU_EXTENSION_RISCV_Zicsr => true, -- implement CSR system?
|
| Line 191... |
Line 192... |
PMP_NUM_REGIONS => 5, -- number of regions (0..64)
|
PMP_NUM_REGIONS => 5, -- number of regions (0..64)
|
PMP_MIN_GRANULARITY => 64*1024, -- minimal region granularity in bytes, has to be a power of 2, min 8 bytes
|
PMP_MIN_GRANULARITY => 64*1024, -- minimal region granularity in bytes, has to be a power of 2, min 8 bytes
|
-- Hardware Performance Monitors (HPM) --
|
-- Hardware Performance Monitors (HPM) --
|
HPM_NUM_CNTS => 12, -- number of inmplemnted HPM counters (0..29)
|
HPM_NUM_CNTS => 12, -- number of inmplemnted HPM counters (0..29)
|
-- Internal Instruction memory --
|
-- Internal Instruction memory --
|
MEM_INT_IMEM_USE => int_imem_c , -- implement processor-internal instruction memory
|
MEM_INT_IMEM_EN => int_imem_c , -- implement processor-internal instruction memory
|
MEM_INT_IMEM_SIZE => imem_size_c, -- size of processor-internal instruction memory in bytes
|
MEM_INT_IMEM_SIZE => imem_size_c, -- size of processor-internal instruction memory in bytes
|
MEM_INT_IMEM_ROM => false, -- implement processor-internal instruction memory as ROM
|
MEM_INT_IMEM_ROM => false, -- implement processor-internal instruction memory as ROM
|
-- Internal Data memory --
|
-- Internal Data memory --
|
MEM_INT_DMEM_USE => int_dmem_c, -- implement processor-internal data memory
|
MEM_INT_DMEM_EN => int_dmem_c, -- implement processor-internal data memory
|
MEM_INT_DMEM_SIZE => dmem_size_c, -- size of processor-internal data memory in bytes
|
MEM_INT_DMEM_SIZE => dmem_size_c, -- size of processor-internal data memory in bytes
|
-- Internal Cache memory --
|
-- Internal Cache memory --
|
ICACHE_USE => icache_use_c, -- implement instruction cache
|
ICACHE_EN => icache_en_c, -- implement instruction cache
|
ICACHE_NUM_BLOCKS => 8, -- i-cache: number of blocks (min 2), has to be a power of 2
|
ICACHE_NUM_BLOCKS => 8, -- i-cache: number of blocks (min 2), has to be a power of 2
|
ICACHE_BLOCK_SIZE => 64, -- i-cache: block size in bytes (min 4), has to be a power of 2
|
ICACHE_BLOCK_SIZE => 64, -- i-cache: block size in bytes (min 4), has to be a power of 2
|
-- External memory interface --
|
-- External memory interface --
|
MEM_EXT_USE => true, -- implement external memory bus interface?
|
MEM_EXT_EN => true, -- implement external memory bus interface?
|
-- Processor peripherals --
|
-- Processor peripherals --
|
IO_GPIO_USE => true, -- implement general purpose input/output port unit (GPIO)?
|
IO_GPIO_EN => true, -- implement general purpose input/output port unit (GPIO)?
|
IO_MTIME_USE => true, -- implement machine system timer (MTIME)?
|
IO_MTIME_EN => true, -- implement machine system timer (MTIME)?
|
IO_UART_USE => true, -- implement universal asynchronous receiver/transmitter (UART)?
|
IO_UART_EN => true, -- implement universal asynchronous receiver/transmitter (UART)?
|
IO_SPI_USE => true, -- implement serial peripheral interface (SPI)?
|
IO_SPI_EN => true, -- implement serial peripheral interface (SPI)?
|
IO_TWI_USE => true, -- implement two-wire interface (TWI)?
|
IO_TWI_EN => true, -- implement two-wire interface (TWI)?
|
IO_PWM_USE => true, -- implement pulse-width modulation unit (PWM)?
|
IO_PWM_EN => true, -- implement pulse-width modulation unit (PWM)?
|
IO_WDT_USE => true, -- implement watch dog timer (WDT)?
|
IO_WDT_EN => true, -- implement watch dog timer (WDT)?
|
IO_TRNG_USE => false, -- trng cannot be simulated
|
IO_TRNG_EN => false, -- trng cannot be simulated
|
IO_CFU0_USE => true, -- implement custom functions unit 0 (CFU0)?
|
IO_CFU0_EN => true, -- implement custom functions unit 0 (CFU0)?
|
IO_CFU1_USE => true -- implement custom functions unit 1 (CFU1)?
|
IO_CFU1_EN => true -- implement custom functions unit 1 (CFU1)?
|
)
|
)
|
port map (
|
port map (
|
-- Global control --
|
-- Global control --
|
clk_i => clk_gen, -- global clock, rising edge
|
clk_i => clk_gen, -- global clock, rising edge
|
rstn_i => rst_gen, -- global reset, low-active, async
|
rstn_i => rst_gen, -- global reset, low-active, async
|
| Line 250... |
Line 251... |
-- TWI --
|
-- TWI --
|
twi_sda_io => twi_sda, -- twi serial data line
|
twi_sda_io => twi_sda, -- twi serial data line
|
twi_scl_io => twi_scl, -- twi serial clock line
|
twi_scl_io => twi_scl, -- twi serial clock line
|
-- PWM --
|
-- PWM --
|
pwm_o => open, -- pwm channels
|
pwm_o => open, -- pwm channels
|
-- system time input from external MTIME (available if IO_MTIME_USE = false) --
|
-- system time input from external MTIME (available if IO_MTIME_EN = false) --
|
mtime_i => (others => '0'), -- current system time
|
mtime_i => (others => '0'), -- current system time
|
-- Interrupts --
|
-- Interrupts --
|
mtime_irq_i => '0', -- machine software interrupt, available if IO_MTIME_USE = false
|
mtime_irq_i => '0', -- machine software interrupt, available if IO_MTIME_EN = false
|
msw_irq_i => msi_ring, -- machine software interrupt
|
msw_irq_i => msi_ring, -- machine software interrupt
|
mext_irq_i => mei_ring -- machine external interrupt
|
mext_irq_i => mei_ring -- machine external interrupt
|
);
|
);
|
|
|
-- TWI termination (pull-ups) --
|
-- TWI termination (pull-ups) --
|
