ibex_core.core

CAPI=2:
# Copyright lowRISC contributors.
# Licensed under the Apache License, Version 2.0, see LICENSE for details.
# SPDX-License-Identifier: Apache-2.0
name: "lowrisc:ibex:ibex_core:0.1"
description: "CPU core with 2 stage pipeline implementing the RV32IMC_Zicsr_Zifencei ISA"

filesets:
  files_rtl:
    depend:
      - lowrisc:prim:assert
      - lowrisc:ibex:ibex_pkg
      - lowrisc:ibex:ibex_icache
    files:
      - rtl/ibex_alu.sv
      - rtl/ibex_compressed_decoder.sv
      - rtl/ibex_controller.sv
      - rtl/ibex_cs_registers.sv
      - rtl/ibex_counters.sv
      - rtl/ibex_decoder.sv
      - rtl/ibex_ex_block.sv
      - rtl/ibex_fetch_fifo.sv
      - rtl/ibex_id_stage.sv
      - rtl/ibex_if_stage.sv
      - rtl/ibex_load_store_unit.sv
      - rtl/ibex_multdiv_fast.sv
      - rtl/ibex_multdiv_slow.sv
      - rtl/ibex_prefetch_buffer.sv
      - rtl/ibex_pmp.sv
      - rtl/ibex_wb_stage.sv
      # XXX: Figure out the best way to switch these two implementations
      # dynamically on the target.
#      - rtl/ibex_register_file_latch.sv # ASIC
#      - rtl/ibex_register_file_fpga.sv # FPGA
      - rtl/ibex_register_file_ff.sv # generic FF-based
      - rtl/ibex_core.sv
    file_type: systemVerilogSource

  files_lint:
    depend:
      - lowrisc:ibex:sim_shared

  files_lint_verilator:
    files:
      - lint/verilator_waiver.vlt: {file_type: vlt}

  files_check_tool_requirements:
    depend:
     - lowrisc:ibex:check_tool_requirements

parameters:
  RVFI:
    datatype: bool
    paramtype: vlogdefine

  SYNTHESIS:
    datatype: bool
    paramtype: vlogdefine

  RV32E:
    datatype: bool
    paramtype: vlogparam

  RV32M:
    datatype: bool
    paramtype: vlogparam

  RV32B:
    datatype: bool
    default: false
    paramtype: vlogparam

  MultiplierImplementation:
    datatype: str
    paramtype: vlogparam
    description: "Multiplier implementation. Valid values: fast, slow"
    default: fast

  ICache:
    datatype: bool
    paramtype: vlogparam
    description: "Enable instruction cache"
    default: false

  ICacheECC:
    datatype: bool
    paramtype: vlogparam
    description: "Enable ECC protection in instruction cache"
    default: false

  BranchTargetALU:
    datatype: bool
    paramtype: vlogparam
    default: false
    description: "Enables seperate branch target ALU (increasing branch performance EXPERIMENTAL)"

  WritebackStage:
    datatype: bool
    paramtype: vlogparam
    default: false
    description: "Enables third pipeline stage (EXPERIMENTAL)"

targets:
  default:
    filesets:
      - tool_verilator ? (files_lint_verilator)
      - files_rtl
      - files_check_tool_requirements
  lint:
    filesets:
      - tool_verilator ? (files_lint_verilator)
      - files_rtl
      - files_lint
      - files_check_tool_requirements
    parameters:
      - SYNTHESIS=true
      - RVFI=true
    default_tool: verilator
    toplevel: ibex_core
    tools:
      verilator:
        mode: lint-only
        verilator_options:
          - "-Wall"
          # RAM primitives wider than 64bit (required for ECC) fail to build in
          # Verilator without increasing the unroll count (see Verilator#1266)
          - "--unroll-count 72"
      veriblelint:
        ruleset: default
        rules:
          - "-parameter-name-style"
  format:
    filesets:
      - files_rtl
    parameters:
      - SYNTHESIS=true
      - RVFI=true
    default_tool: veribleformat
    toplevel: ibex_core
    tools:
      veribleformat:
        verible_format_args:
          - "--inplace"