127 lines
3.0 KiB
C++
127 lines
3.0 KiB
C++
/*!
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\file CPU.h
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\brief Main CPU class
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\author Màrius Montón
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\date August 2018
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*/
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// SPDX-License-Identifier: GPL-3.0-or-later
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#ifndef CPU_BASE_H
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#define CPU_BASE_H
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#define SC_INCLUDE_DYNAMIC_PROCESSES
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#include "systemc"
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#include "tlm.h"
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#include "tlm_utils/simple_initiator_socket.h"
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#include "tlm_utils/tlm_quantumkeeper.h"
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#include "memory.h"
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#include "MemoryInterface.h"
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#include "BASE_ISA.h"
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#include "Registers.h"
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#include "Instruction.h"
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#include "C_extension.h"
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#include "M_extension.h"
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#include "A_extension.h"
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namespace riscv_tlm {
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/**
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* @brief ISC_V CPU model
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* @param name name of the module
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*/
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class CPU : sc_core::sc_module {
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public:
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/**
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* @brief Instruction Memory bus socket
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* @param trans transction to perfoem
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* @param delay time to annotate
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*/
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tlm_utils::simple_initiator_socket<CPU> instr_bus;
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/**
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* @brief IRQ line socket
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* @param trans transction to perform (empty)
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* @param delay time to annotate
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*/
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tlm_utils::simple_target_socket<CPU> irq_line_socket;
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/**
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* @brief Constructor
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* @param name Module name
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* @param PC Program Counter initialize value
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* @param debug To start debugging
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*/
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CPU(sc_core::sc_module_name const &name, std::uint32_t PC, bool debug);
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/**
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* @brief Destructor
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*/
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~CPU() override;
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MemoryInterface *mem_intf;
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bool CPU_step();
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Registers *getRegisterBank() { return register_bank; }
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private:
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Registers *register_bank;
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Performance *perf;
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std::shared_ptr<spdlog::logger> logger;
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C_extension *c_inst;
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M_extension *m_inst;
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A_extension *a_inst;
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BASE_ISA *exec;
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tlm_utils::tlm_quantumkeeper *m_qk;
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Instruction inst;
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bool interrupt;
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std::uint32_t int_cause;
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bool irq_already_down;
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sc_core::sc_time default_time;
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bool dmi_ptr_valid;
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tlm::tlm_generic_payload trans;
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std::uint32_t INSTR;
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unsigned char *dmi_ptr = nullptr;
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/**
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*
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* @brief Process and triggers IRQ if all conditions met
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* @return true if IRQ is triggered, false otherwise
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*/
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bool cpu_process_IRQ();
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/**
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* main thread for CPU simulation
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* @brief CPU mai thread
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*/
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[[noreturn]] void CPU_thread();
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/**
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* @brief callback for IRQ simple socket
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* @param trans transaction to perform (empty)
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* @param delay time to annotate
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*
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* it triggers an IRQ when called
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*/
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void call_interrupt(tlm::tlm_generic_payload &trans,
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sc_core::sc_time &delay);
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/**
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* DMI pointer is not longer valid
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* @param start memory address region start
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* @param end memory address region end
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*/
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void invalidate_direct_mem_ptr(sc_dt::uint64 start, sc_dt::uint64 end);
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};
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}
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#endif
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