92 lines
2.2 KiB
C++
92 lines
2.2 KiB
C++
/*!
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\file extension_base.h
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\brief Base class for ISA extensions
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\author Màrius Montón
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\date May 2020
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*/
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// SPDX-License-Identifier: GPL-3.0-or-later
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#ifndef INC_EXTENSION_BASE_H_
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#define INC_EXTENSION_BASE_H_
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#include "systemc"
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#include "Instruction.h"
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#include "Registers.h"
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#include "MemoryInterface.h"
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#include "spdlog/spdlog.h"
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#include "spdlog/sinks/basic_file_sink.h"
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#define EXCEPTION_CAUSE_INSTRUCTION_MISALIGN 0
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#define EXCEPTION_CAUSE_INSTRUCTION_ACCESS 1
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#define EXCEPTION_CAUSE_ILLEGAL_INSTRUCTION 2
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#define EXCEPTION_CAUSE_BREAKPOINT 3
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#define EXCEPTION_CAUSE_BREAK 3
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#define EXCEPTION_CAUSE_LOAD_ADDR_MISALIGN 4
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#define EXCEPTION_CAUSE_LOAD_ACCESS_FAULT 5
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namespace riscv_tlm {
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class extension_base {
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public:
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extension_base(const sc_dt::sc_uint<32> &instr, Registers *register_bank,
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MemoryInterface *mem_interface);
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virtual ~extension_base() = 0;
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void setInstr(std::uint32_t p_instr);
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void RaiseException(std::uint32_t cause, std::uint32_t inst);
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bool NOP();
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/* pure virtual functions */
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virtual std::int32_t opcode() const = 0;
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virtual std::int32_t get_rd() const {
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return m_instr.range(11, 7);
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}
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virtual void set_rd(std::int32_t value) {
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m_instr.range(11, 7) = value;
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}
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virtual std::int32_t get_rs1() const {
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return m_instr.range(19, 15);
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}
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virtual void set_rs1(std::int32_t value) {
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m_instr.range(19, 15) = value;
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}
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virtual std::int32_t get_rs2() const {
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return m_instr.range(24, 20);
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}
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virtual void set_rs2(std::int32_t value) {
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m_instr.range(24, 20) = value;
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}
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virtual std::int32_t get_funct3() const {
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return m_instr.range(14, 12);
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}
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virtual void set_funct3(std::int32_t value) {
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m_instr.range(14, 12) = value;
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}
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virtual void dump() const;
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protected:
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sc_dt::sc_uint<32> m_instr;
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Registers *regs;
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Performance *perf;
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MemoryInterface *mem_intf;
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std::shared_ptr<spdlog::logger> logger;
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};
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}
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#endif /* INC_EXTENSION_BASE_H_ */
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