135 lines
2.4 KiB
C++
135 lines
2.4 KiB
C++
/*!
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\file A_extension.h
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\brief Implement A extensions part of the RISC-V
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\author Màrius Montón
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\date December 2018
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*/
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// SPDX-License-Identifier: GPL-3.0-or-later
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#ifndef A_EXTENSION__H
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#define A_EXTENSION__H
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#include "systemc"
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#include <unordered_set>
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#include "Log.h"
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#include "Registers.h"
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#include "MemoryInterface.h"
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#include "extension_base.h"
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typedef enum {
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OP_A_LR,
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OP_A_SC,
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OP_A_AMOSWAP,
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OP_A_AMOADD,
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OP_A_AMOXOR,
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OP_A_AMOAND,
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OP_A_AMOOR,
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OP_A_AMOMIN,
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OP_A_AMOMAX,
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OP_A_AMOMINU,
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OP_A_AMOMAXU,
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OP_A_ERROR
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} op_A_Codes;
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typedef enum {
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A_LR = 0b00010,
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A_SC = 0b00011,
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A_AMOSWAP = 0b00001,
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A_AMOADD = 0b00000,
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A_AMOXOR = 0b00100,
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A_AMOAND = 0b01100,
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A_AMOOR = 0b01000,
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A_AMOMIN = 0b10000,
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A_AMOMAX = 0b10100,
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A_AMOMINU = 0b11000,
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A_AMOMAXU = 0b11100,
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} A_Codes;
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/**
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* @brief Instruction decoding and fields access
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*/
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class A_extension: public extension_base {
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public:
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/**
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* @brief Constructor, same as base class
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*/
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using extension_base::extension_base;
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/**
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* @brief Access to opcode field
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* @return return opcode field
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*/
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inline int32_t opcode() const override {
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return m_instr.range(31, 27);
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}
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/**
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* @brief Access to rs1 field
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* @return rs1 field
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*/
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inline int32_t get_rs1() const override {
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return m_instr.range(19, 15);
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}
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inline void set_rs1(int32_t value) override {
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m_instr.range(19, 15) = value;
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}
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/**
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* @brief Access to rs2 field
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* @return rs2 field
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*/
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inline int32_t get_rs2() const override {
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return m_instr.range(24, 20);
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}
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inline void set_rs2(int32_t value) override {
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m_instr.range(24, 20) = value;
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}
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inline int32_t get_funct3() const override {
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return m_instr.range(14, 12);
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}
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inline void set_funct3(int32_t value) override {
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m_instr.range(14, 12) = value;
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}
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/**
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* @brief Decodes opcode of instruction
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* @return opcode of instruction
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*/
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op_A_Codes decode() const;
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inline void dump() const override {
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std::cout << std::hex << "0x" << m_instr << std::dec << std::endl;
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}
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bool Exec_A_LR();
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bool Exec_A_SC();
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bool Exec_A_AMOSWAP() const;
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bool Exec_A_AMOADD() const;
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bool Exec_A_AMOXOR() const;
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bool Exec_A_AMOAND() const;
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bool Exec_A_AMOOR() const;
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bool Exec_A_AMOMIN() const;
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bool Exec_A_AMOMAX() const;
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bool Exec_A_AMOMINU() const;
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bool Exec_A_AMOMAXU() const;
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bool process_instruction(Instruction *inst);
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void TLB_reserve(uint32_t address);
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bool TLB_reserved(uint32_t address);
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private:
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std::unordered_set<uint32_t> TLB_A_Entries;
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};
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#endif
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