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minor optimization in access logic

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stnolting 2020-10-11 19:11:55 +02:00
parent 488338d958
commit e07f69d3d9
1 changed files with 5 additions and 2 deletions
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7
rtl/core/neorv32_wishbone.vhd
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@ -123,11 +123,14 @@ begin
-- Access Control -------------------------------------------------------------------------
-- -------------------------------------------------------------------------------------------
-- access to internal IMEM or DMEM? --
int_imem_acc <= '1' when (addr_i >= imem_base_c) and (addr_i < std_ulogic_vector(unsigned(imem_base_c) + MEM_INT_IMEM_SIZE)) else '0';
int_dmem_acc <= '1' when (addr_i >= dmem_base_c) and (addr_i < std_ulogic_vector(unsigned(dmem_base_c) + MEM_INT_DMEM_SIZE)) else '0';
int_imem_acc <= '1' when (addr_i(31 downto index_size_f(MEM_INT_IMEM_SIZE)) = imem_base_c(31 downto index_size_f(MEM_INT_IMEM_SIZE))) else '0';
int_dmem_acc <= '1' when (addr_i(31 downto index_size_f(MEM_INT_DMEM_SIZE)) = dmem_base_c(31 downto index_size_f(MEM_INT_DMEM_SIZE))) else '0';
int_imem_acc_real <= int_imem_acc when (MEM_INT_IMEM_USE = true) else '0';
int_dmem_acc_real <= int_dmem_acc when (MEM_INT_DMEM_USE = true) else '0';
-- access to internal BOOTROM or IO devices? --
int_boot_acc <= '1' when (addr_i >= boot_rom_base_c) else '0'; -- this also covers access to the IO space
--int_boot_acc <= '1' when (addr_i(31 downto index_size_f(2*boot_rom_max_size_c)) = boot_rom_base_c(31 downto index_size_f(2*boot_rom_max_size_c))) else '0'; -- this also covers access to the IO space
--int_io_acc <= '1' when (addr_i >= io_base_c) else '0';
-- actual external bus access? --