| Line 65... |
Line 65... |
-- Extension Options --
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-- Extension Options --
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FAST_MUL_EN : boolean := false; -- use DSPs for M extension's multiplier
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FAST_MUL_EN : boolean := false; -- use DSPs for M extension's multiplier
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-- Physical Memory Protection (PMP) --
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-- Physical Memory Protection (PMP) --
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PMP_USE : boolean := false; -- implement PMP?
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PMP_USE : boolean := false; -- implement PMP?
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PMP_NUM_REGIONS : natural := 4; -- number of regions (max 8)
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PMP_NUM_REGIONS : natural := 4; -- number of regions (max 8)
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PMP_GRANULARITY : natural := 14; -- minimal region granularity (1=8B, 2=16B, 3=32B, ...) default is 64k
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PMP_GRANULARITY : natural := 14 -- minimal region granularity (1=8B, 2=16B, 3=32B, ...) default is 64k
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-- Bus Interface --
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BUS_TIMEOUT : natural := 15 -- cycles after which a valid bus access will timeout
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);
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);
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port (
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port (
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-- global control --
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-- global control --
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clk_i : in std_ulogic := '0'; -- global clock, rising edge
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clk_i : in std_ulogic := '0'; -- global clock, rising edge
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rstn_i : in std_ulogic := '0'; -- global reset, low-active, async
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rstn_i : in std_ulogic := '0'; -- global reset, low-active, async
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| Line 155... |
Line 153... |
assert not ((CPU_EXTENSION_RISCV_Zicsr = false) and (PMP_USE = true)) report "NEORV32 CPU CONFIG ERROR! Physical memory protection (PMP) requires CPU_EXTENSION_RISCV_Zicsr extension." severity error;
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assert not ((CPU_EXTENSION_RISCV_Zicsr = false) and (PMP_USE = true)) report "NEORV32 CPU CONFIG ERROR! Physical memory protection (PMP) requires CPU_EXTENSION_RISCV_Zicsr extension." severity error;
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-- PMP regions --
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-- PMP regions --
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assert not ((PMP_NUM_REGIONS > pmp_max_r_c) and (PMP_USE = true)) report "NEORV32 CPU CONFIG ERROR! Number of PMP regions out of valid range." severity error;
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assert not ((PMP_NUM_REGIONS > pmp_max_r_c) and (PMP_USE = true)) report "NEORV32 CPU CONFIG ERROR! Number of PMP regions out of valid range." severity error;
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-- PMP granulartiy --
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-- PMP granulartiy --
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assert not (((PMP_GRANULARITY < 1) or (PMP_GRANULARITY > 32)) and (PMP_USE = true)) report "NEORV32 CPU CONFIG ERROR! Invalid PMP granulartiy (0 < G < 33)." severity error;
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assert not (((PMP_GRANULARITY < 1) or (PMP_GRANULARITY > 32)) and (PMP_USE = true)) report "NEORV32 CPU CONFIG ERROR! Invalid PMP granulartiy (0 < G < 33)." severity error;
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-- Bus timeout --
|
|
assert not (BUS_TIMEOUT < 1) report "NEORV32 CPU CONFIG ERROR! Invalid bus timeout - must be at least 1 cycle." severity error;
|
|
|
|
|
|
-- Control Unit ---------------------------------------------------------------------------
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-- Control Unit ---------------------------------------------------------------------------
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-- -------------------------------------------------------------------------------------------
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-- -------------------------------------------------------------------------------------------
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neorv32_cpu_control_inst: neorv32_cpu_control
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neorv32_cpu_control_inst: neorv32_cpu_control
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| Line 313... |
Line 309... |
-- Bus Interface Unit ---------------------------------------------------------------------
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-- Bus Interface Unit ---------------------------------------------------------------------
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-- -------------------------------------------------------------------------------------------
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-- -------------------------------------------------------------------------------------------
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neorv32_cpu_bus_inst: neorv32_cpu_bus
|
neorv32_cpu_bus_inst: neorv32_cpu_bus
|
generic map (
|
generic map (
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CPU_EXTENSION_RISCV_C => CPU_EXTENSION_RISCV_C, -- implement compressed extension?
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CPU_EXTENSION_RISCV_C => CPU_EXTENSION_RISCV_C, -- implement compressed extension?
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BUS_TIMEOUT => BUS_TIMEOUT, -- cycles after which a valid bus access will timeout
|
|
-- Physical memory protection (PMP) --
|
-- Physical memory protection (PMP) --
|
PMP_USE => PMP_USE, -- implement physical memory protection?
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PMP_USE => PMP_USE, -- implement physical memory protection?
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PMP_NUM_REGIONS => PMP_NUM_REGIONS, -- number of regions (1..4)
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PMP_NUM_REGIONS => PMP_NUM_REGIONS, -- number of regions (1..4)
|
PMP_GRANULARITY => PMP_GRANULARITY -- granularity (0=none, 1=8B, 2=16B, 3=32B, ...)
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PMP_GRANULARITY => PMP_GRANULARITY -- granularity (0=none, 1=8B, 2=16B, 3=32B, ...)
|
)
|
)
|
