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[top] restrict IO access to M-mode software

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stnolting 2024-07-21 10:08:16 +02:00
parent 92547d3764
commit ff658f2319
1 changed files with 10 additions and 4 deletions
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14
rtl/core/neorv32_top.vhd
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@ -740,29 +740,35 @@ begin
A_BASE => mem_imem_base_c,
A_SIZE => imem_size_c,
A_TMO_EN => true,
A_PRIV => false,
-- port B: DMEM --
B_ENABLE => MEM_INT_DMEM_EN,
B_BASE => mem_dmem_base_c,
B_SIZE => dmem_size_c,
B_TMO_EN => true,
B_PRIV => false,
-- port C: XIP --
C_ENABLE => XIP_EN,
C_BASE => mem_xip_base_c,
C_SIZE => mem_xip_size_c,
C_TMO_EN => false, -- not timeout for XIP flash accesses
C_TMO_EN => false, -- no timeout for XIP accesses
C_PRIV => false,
-- port D: BOOT ROM --
D_ENABLE => INT_BOOTLOADER_EN,
D_BASE => mem_boot_base_c,
D_SIZE => mem_boot_size_c,
D_TMO_EN => true,
D_PRIV => false,
-- port E: IO --
E_ENABLE => true, -- always enabled (mandatory core module)
E_ENABLE => true, -- always enabled (but will be trimmed if no IO devices are implemented)
E_BASE => mem_io_base_c,
E_SIZE => mem_io_size_c,
E_TMO_EN => true,
-- port X: XBUS --
E_PRIV => true, -- only privileged (M-mode) accesses are allowed
-- port X (the void): XBUS --
X_ENABLE => XBUS_EN,
X_TMO_EN => false -- timeout handled by XBUS gateway
X_TMO_EN => false, -- timeout handled by XBUS gateway
X_PRIV => false
)
port map (
-- global control --