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package neorv32_package is
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package neorv32_package is
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-- Architecture Constants/Configuration ---------------------------------------------------
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-- Architecture Constants/Configuration ---------------------------------------------------
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-- -------------------------------------------------------------------------------------------
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-- -------------------------------------------------------------------------------------------
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constant data_width_c : natural := 32; -- data width - FIXED!
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constant data_width_c : natural := 32; -- data width - FIXED!
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constant hw_version_c : std_ulogic_vector(31 downto 0) := x"01040300"; -- no touchy!
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constant hw_version_c : std_ulogic_vector(31 downto 0) := x"01040302"; -- no touchy!
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constant pmp_max_r_c : natural := 8; -- max PMP regions - FIXED!
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constant pmp_max_r_c : natural := 8; -- max PMP regions - FIXED!
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constant ipb_entries_c : natural := 2; -- entries in instruction prefetch buffer, must be a power of 2, default=2
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constant ipb_entries_c : natural := 2; -- entries in instruction prefetch buffer, must be a power of 2, default=2
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constant rf_r0_is_reg_c : boolean := true; -- reg_file.r0 is a physical register that has to be initialized to zero
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-- Helper Functions -----------------------------------------------------------------------
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-- Helper Functions -----------------------------------------------------------------------
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-- -------------------------------------------------------------------------------------------
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-- -------------------------------------------------------------------------------------------
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function index_size_f(input : natural) return natural;
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function index_size_f(input : natural) return natural;
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function cond_sel_natural_f(cond : boolean; val_t : natural; val_f : natural) return natural;
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function cond_sel_natural_f(cond : boolean; val_t : natural; val_f : natural) return natural;
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constant ctrl_rf_rd_adr1_c : natural := 13; -- destiantion register address bit 1
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constant ctrl_rf_rd_adr1_c : natural := 13; -- destiantion register address bit 1
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constant ctrl_rf_rd_adr2_c : natural := 14; -- destiantion register address bit 2
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constant ctrl_rf_rd_adr2_c : natural := 14; -- destiantion register address bit 2
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constant ctrl_rf_rd_adr3_c : natural := 15; -- destiantion register address bit 3
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constant ctrl_rf_rd_adr3_c : natural := 15; -- destiantion register address bit 3
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constant ctrl_rf_rd_adr4_c : natural := 16; -- destiantion register address bit 4
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constant ctrl_rf_rd_adr4_c : natural := 16; -- destiantion register address bit 4
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constant ctrl_rf_wb_en_c : natural := 17; -- write back enable
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constant ctrl_rf_wb_en_c : natural := 17; -- write back enable
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constant ctrl_rf_clear_rs1_c : natural := 18; -- force rs1=r0
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constant ctrl_rf_r0_we_c : natural := 18; -- allow write access to r0 (zero), also forces dst=r0
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-- alu --
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-- alu --
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constant ctrl_alu_cmd0_c : natural := 19; -- ALU command bit 0
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constant ctrl_alu_cmd0_c : natural := 19; -- ALU command bit 0
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constant ctrl_alu_cmd1_c : natural := 20; -- ALU command bit 1
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constant ctrl_alu_cmd1_c : natural := 20; -- ALU command bit 1
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constant ctrl_alu_cmd2_c : natural := 21; -- ALU command bit 2
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constant ctrl_alu_cmd2_c : natural := 21; -- ALU command bit 2
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constant ctrl_alu_opa_mux_lsb_c : natural := 22; -- operand A select lsb (00=rs1, 01=PC)
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constant ctrl_alu_opa_mux_lsb_c : natural := 22; -- operand A select lsb (00=rs1, 01=PC)
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constant ctrl_alu_opa_mux_msb_c : natural := 23; -- operand A select msb (1-=CSR)
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constant ctrl_alu_opa_mux_msb_c : natural := 23; -- operand A select msb (1-=CSR)
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constant ctrl_alu_opb_mux_lsb_c : natural := 24; -- operand B select lsb (00=rs2, 01=IMM)
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constant ctrl_alu_opb_mux_c : natural := 24; -- operand B select (0=rs2, 1=IMM)
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constant ctrl_alu_opb_mux_msb_c : natural := 25; -- operand B select msb (1-=rs1)
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constant ctrl_alu_opc_mux_c : natural := 25; -- operand C select (0=IMM, 1=rs2)
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constant ctrl_alu_opc_mux_c : natural := 26; -- operand C select (0=IMM, 1=rs2)
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constant ctrl_alu_unsigned_c : natural := 26; -- is unsigned ALU operation
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constant ctrl_alu_unsigned_c : natural := 27; -- is unsigned ALU operation
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constant ctrl_alu_shift_dir_c : natural := 27; -- shift direction (0=left, 1=right)
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constant ctrl_alu_shift_dir_c : natural := 28; -- shift direction (0=left, 1=right)
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constant ctrl_alu_shift_ar_c : natural := 28; -- is arithmetic shift
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constant ctrl_alu_shift_ar_c : natural := 29; -- is arithmetic shift
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-- bus interface --
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-- bus interface --
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constant ctrl_bus_size_lsb_c : natural := 30; -- transfer size lsb (00=byte, 01=half-word)
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constant ctrl_bus_size_lsb_c : natural := 29; -- transfer size lsb (00=byte, 01=half-word)
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constant ctrl_bus_size_msb_c : natural := 31; -- transfer size msb (10=word, 11=?)
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constant ctrl_bus_size_msb_c : natural := 30; -- transfer size msb (10=word, 11=?)
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constant ctrl_bus_rd_c : natural := 32; -- read data request
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constant ctrl_bus_rd_c : natural := 31; -- read data request
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constant ctrl_bus_wr_c : natural := 33; -- write data request
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constant ctrl_bus_wr_c : natural := 32; -- write data request
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constant ctrl_bus_if_c : natural := 34; -- instruction fetch request
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constant ctrl_bus_if_c : natural := 33; -- instruction fetch request
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constant ctrl_bus_mar_we_c : natural := 35; -- memory address register write enable
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constant ctrl_bus_mar_we_c : natural := 34; -- memory address register write enable
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constant ctrl_bus_mdo_we_c : natural := 36; -- memory data out register write enable
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constant ctrl_bus_mdo_we_c : natural := 35; -- memory data out register write enable
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constant ctrl_bus_mdi_we_c : natural := 37; -- memory data in register write enable
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constant ctrl_bus_mdi_we_c : natural := 36; -- memory data in register write enable
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constant ctrl_bus_unsigned_c : natural := 38; -- is unsigned load
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constant ctrl_bus_unsigned_c : natural := 37; -- is unsigned load
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constant ctrl_bus_ierr_ack_c : natural := 39; -- acknowledge instruction fetch bus exception
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constant ctrl_bus_ierr_ack_c : natural := 38; -- acknowledge instruction fetch bus exception
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constant ctrl_bus_derr_ack_c : natural := 40; -- acknowledge data access bus exception
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constant ctrl_bus_derr_ack_c : natural := 39; -- acknowledge data access bus exception
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constant ctrl_bus_fence_c : natural := 41; -- executed fence operation
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constant ctrl_bus_fence_c : natural := 40; -- executed fence operation
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constant ctrl_bus_fencei_c : natural := 42; -- executed fencei operation
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constant ctrl_bus_fencei_c : natural := 41; -- executed fencei operation
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-- co-processor --
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-- co-processor --
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constant ctrl_cp_use_c : natural := 43; -- is cp operation
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constant ctrl_cp_use_c : natural := 42; -- is cp operation
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constant ctrl_cp_id_lsb_c : natural := 44; -- cp select lsb
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constant ctrl_cp_id_lsb_c : natural := 43; -- cp select ID lsb
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constant ctrl_cp_id_msb_c : natural := 45; -- cp select msb
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constant ctrl_cp_id_msb_c : natural := 44; -- cp select ID msb
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constant ctrl_cp_cmd0_c : natural := 46; -- cp command bit 0
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constant ctrl_cp_cmd0_c : natural := 45; -- cp command bit 0
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constant ctrl_cp_cmd1_c : natural := 47; -- cp command bit 1
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constant ctrl_cp_cmd1_c : natural := 46; -- cp command bit 1
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constant ctrl_cp_cmd2_c : natural := 48; -- cp command bit 2
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constant ctrl_cp_cmd2_c : natural := 47; -- cp command bit 2
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-- control bus size --
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-- control bus size --
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constant ctrl_width_c : natural := 49; -- control bus size
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constant ctrl_width_c : natural := 48; -- control bus size
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-- ALU Comparator Bus ---------------------------------------------------------------------
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-- ALU Comparator Bus ---------------------------------------------------------------------
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-- -------------------------------------------------------------------------------------------
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-- -------------------------------------------------------------------------------------------
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constant alu_cmp_equal_c : natural := 0;
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constant alu_cmp_equal_c : natural := 0;
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constant alu_cmp_less_c : natural := 1; -- for signed and unsigned comparisons
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constant alu_cmp_less_c : natural := 1; -- for signed and unsigned comparisons
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