text: // Copyright 2019 Google LLC
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //     http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  #ifndef DARWINN_DRIVER_RUN_CONTROLLER_H_
  #define DARWINN_DRIVER_RUN_CONTROLLER_H_
  
  #include "driver/config/chip_config.h"
  #include "driver/config/scalar_core_csr_offsets.h"
  #include "driver/config/tile_config_csr_offsets.h"
  #include "driver/config/tile_csr_offsets.h"
  #include "driver/hardware_structures.h"
  #include "driver/registers/registers.h"
  #include "port/status.h"
  
  namespace platforms {
  namespace darwinn {
  namespace driver {
  
  // Controls run states of both scalar core and tiles.
  class RunController {
   public:
    RunController(const config::ChipConfig& config, Registers* registers);
    virtual ~RunController() = default;
  
    // This class is neither copyable nor movable.
    RunController(const RunController&) = delete;
    RunController& operator=(const RunController&) = delete;
  
    // Performs run control.
    virtual util::Status DoRunControl(RunControl run_state);
  
   private:
    // CSR offsets.
    const config::ScalarCoreCsrOffsets& scalar_core_csr_offsets_;
    const config::TileConfigCsrOffsets& tile_config_csr_offsets_;
    const config::TileCsrOffsets& tile_csr_offsets_;
    bool has_thread_csr_offsets_;
    const config::TileThreadCsrOffsets* const tile_thread_0_csr_offsets_;
    const config::TileThreadCsrOffsets* const tile_thread_1_csr_offsets_;
    const config::TileThreadCsrOffsets* const tile_thread_2_csr_offsets_;
    const config::TileThreadCsrOffsets* const tile_thread_3_csr_offsets_;
    const config::TileThreadCsrOffsets* const tile_thread_4_csr_offsets_;
    const config::TileThreadCsrOffsets* const tile_thread_5_csr_offsets_;
    const config::TileThreadCsrOffsets* const tile_thread_6_csr_offsets_;
    const config::TileThreadCsrOffsets* const tile_thread_7_csr_offsets_;
  
    // CSR interface.
    Registers* const registers_;
  };
  
  }  // namespace driver
  }  // namespace darwinn
  }  // namespace platforms
  
  #endif  // DARWINN_DRIVER_RUN_CONTROLLER_H_
  