risc-v-tlm/inc/CPU.h

213 lines
5.7 KiB
C++

/*!
\file CPU.h
\brief Main CPU class
\author Màrius Montón
\date August 2018
*/
// SPDX-License-Identifier: GPL-3.0-or-later
#ifndef CPU_BASE_H
#define CPU_BASE_H
#define SC_INCLUDE_DYNAMIC_PROCESSES
#include "systemc"
#include "tlm.h"
#include "tlm_utils/simple_initiator_socket.h"
#include "tlm_utils/tlm_quantumkeeper.h"
#include "memory.h"
#include "MemoryInterface.h"
#include "BASE_ISA.h"
#include "Registers.h"
#include "Instruction.h"
#include "C_extension.h"
#include "M_extension.h"
#include "A_extension.h"
namespace riscv_tlm {
class CPU : sc_core::sc_module {
public:
/* Constructors */
explicit CPU(sc_core::sc_module_name const &name, bool debug);
CPU() noexcept = delete;
CPU(const CPU& other) noexcept = delete;
CPU(CPU && other) noexcept = delete;
CPU& operator=(const CPU& other) noexcept = delete;
CPU& operator=(CPU&& other) noexcept = delete;
/* Destructors */
~CPU() override = default;
/**
* @brief Perform one instruction step
* @return Breackpoint found (TBD, always true)
*/
virtual bool CPU_step() = 0;
/**
* @brief Instruction Memory bus socket
* @param trans transction to perfoem
* @param delay time to annotate
*/
tlm_utils::simple_initiator_socket<CPU> instr_bus;
/**
* @brief IRQ line socket
* @param trans transction to perform (empty)
* @param delay time to annotate
*/
tlm_utils::simple_target_socket<CPU> irq_line_socket;
/**
* @brief DMI pointer is not longer valid
* @param start memory address region start
* @param end memory address region end
*/
void invalidate_direct_mem_ptr(sc_dt::uint64 start, sc_dt::uint64 end);
/**
* @brief CPU main thread
*/
[[noreturn]] void CPU_thread();
/**
* @brief Process and triggers IRQ if all conditions met
* @return true if IRQ is triggered, false otherwise
*/
virtual bool cpu_process_IRQ() = 0;
/**
* @brief callback for IRQ simple socket
* @param trans transaction to perform (empty)
* @param delay time to annotate
*
* it triggers an IRQ when called
*/
virtual void call_interrupt(tlm::tlm_generic_payload &trans,
sc_core::sc_time &delay) = 0;
public:
MemoryInterface *mem_intf;
protected:
Performance *perf;
std::shared_ptr<spdlog::logger> logger;
tlm_utils::tlm_quantumkeeper *m_qk;
Instruction inst;
bool interrupt;
bool irq_already_down;
sc_core::sc_time default_time;
bool dmi_ptr_valid;
tlm::tlm_generic_payload trans;
unsigned char *dmi_ptr = nullptr;
};
/**
* @brief RISC_V CPU 32 bits model
* @param name name of the module
*/
class RV32 : public CPU {
public:
using BaseType = std::uint32_t;
/**
* @brief Constructor
* @param name Module name
* @param PC Program Counter initialize value
* @param debug To start debugging
*/
RV32(sc_core::sc_module_name const &name, BaseType PC, bool debug);
/**
* @brief Destructor
*/
~RV32() override;
bool CPU_step() override;
Registers<BaseType> *getRegisterBank() { return register_bank; }
private:
Registers<BaseType> *register_bank;
C_extension<BaseType> *c_inst;
M_extension<BaseType> *m_inst;
A_extension<BaseType> *a_inst;
BASE_ISA<BaseType> *exec;
BaseType int_cause;
BaseType INSTR;
/**
*
* @brief Process and triggers IRQ if all conditions met
* @return true if IRQ is triggered, false otherwise
*/
bool cpu_process_IRQ() override;
/**
* @brief callback for IRQ simple socket
* @param trans transaction to perform (empty)
* @param delay time to annotate
*
* it triggers an IRQ when called
*/
void call_interrupt(tlm::tlm_generic_payload &trans,
sc_core::sc_time &delay) override;
}; // RV32 class
/**
* @brief RISC_V CPU 64 bits model
* @param name name of the module
*/
class RV64 : public CPU {
public:
using BaseType = std::uint64_t;
/**
* @brief Constructor
* @param name Module name
* @param PC Program Counter initialize value
* @param debug To start debugging
*/
RV64(sc_core::sc_module_name const &name, BaseType PC, bool debug);
/**
* @brief Destructor
*/
~RV64() override;
bool CPU_step() override;
Registers<BaseType> *getRegisterBank() { return register_bank; }
private:
Registers<BaseType> *register_bank;
C_extension<BaseType> *c_inst;
M_extension<BaseType> *m_inst;
A_extension<BaseType> *a_inst;
BASE_ISA<BaseType> *exec;
BaseType int_cause;
BaseType INSTR;
/**
*
* @brief Process and triggers IRQ if all conditions met
* @return true if IRQ is triggered, false otherwise
*/
bool cpu_process_IRQ() override;
/**
* @brief callback for IRQ simple socket
* @param trans transaction to perform (empty)
* @param delay time to annotate
*
* it triggers an IRQ when called
*/
void call_interrupt(tlm::tlm_generic_payload &trans,
sc_core::sc_time &delay) override;
}; // RV64 class
}
#endif