139 lines
4.3 KiB
C++
139 lines
4.3 KiB
C++
//****************************************************************************
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//
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// RVDDT (RISC-V Dynamic Debugging Tool)
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//
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// Copyright (C) 2020 John Winans
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
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// USA
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//
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//****************************************************************************
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#ifndef rv32_H
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#define rv32_H
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#include <stdint.h>
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#include <stdint.h>
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#include "memory.h"
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enum class insntype { R, I, S, B, U, J };
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class rv32;
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typedef void (*execInsnFunc)(rv32 *, uint32_t);
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struct insn
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{
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uint8_t opcode;
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insntype itype;
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uint8_t funct3_flag;
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uint8_t funct3;
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uint8_t funct7_flag;
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uint8_t funct7;
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const char *mneumonic;
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execInsnFunc func;
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};
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class rv32
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{
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public:
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rv32();
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~rv32();
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void reset();
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void dump();
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int32_t getReg(uint8_t reg);
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int32_t getPc();
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void setReg(uint8_t reg, int32_t val);
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void setPc(int32_t val);
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int exec();
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int setTrace(int);
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int getRegNamesABI() const { return regNamesABI; }
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void setRegNamesABI(int i) { regNamesABI = i?1:0; }
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const char *getRegName(uint8_t r);
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int32_t getInsnImmI(uint32_t insn);
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int32_t getInsnImmS(uint32_t insn);
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int32_t getInsnImmB(uint32_t insn);
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int32_t getInsnImmU(uint32_t insn);
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int32_t getInsnImmJ(uint32_t insn);
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int8_t getInsnRd(uint32_t insn) { return (insn&0x00000f80)>>7; }
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int8_t getInsnRs1(uint32_t insn) { return (insn&0x000f8000)>>15; }
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int8_t getInsnRs2(uint32_t insn) { return (insn&0x01f00000)>>20; }
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int8_t getInsnOpcode(uint32_t insn) { return insn&0x000007f; }
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int8_t getInsnFunct3(uint32_t insn) { return (insn&0x0007000)>>12; }
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int8_t getInsnFunct7(uint32_t insn) { return (insn&0xfe000000)>>25; }
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static void exec_LUI(rv32 *, uint32_t insn);
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static void exec_AUIPC(rv32 *, uint32_t insn);
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static void exec_JAL(rv32 *, uint32_t insn);
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static void exec_JALR(rv32 *, uint32_t insn);
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static void exec_BEQ(rv32 *, uint32_t insn);
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static void exec_BNE(rv32 *, uint32_t insn);
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static void exec_BLT(rv32 *, uint32_t insn);
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static void exec_BGE(rv32 *, uint32_t insn);
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static void exec_BLTU(rv32 *, uint32_t insn);
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static void exec_BGEU(rv32 *, uint32_t insn);
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static void exec_LB(rv32 *, uint32_t insn);
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static void exec_LH(rv32 *, uint32_t insn);
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static void exec_LW(rv32 *, uint32_t insn);
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static void exec_LBU(rv32 *, uint32_t insn);
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static void exec_LHU(rv32 *, uint32_t insn);
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static void exec_SB(rv32 *, uint32_t insn);
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static void exec_SH(rv32 *, uint32_t insn);
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static void exec_SW(rv32 *, uint32_t insn);
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static void exec_ADDI(rv32 *, uint32_t insn);
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static void exec_SLTI(rv32 *, uint32_t insn);
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static void exec_SLTIU(rv32 *, uint32_t insn);
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static void exec_XORI(rv32 *, uint32_t insn);
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static void exec_ORI(rv32 *, uint32_t insn);
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static void exec_ANDI(rv32 *, uint32_t insn);
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static void exec_SLLI(rv32 *, uint32_t insn);
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static void exec_SRLI(rv32 *, uint32_t insn);
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static void exec_SRAI(rv32 *, uint32_t insn);
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static void exec_ADD(rv32 *, uint32_t insn);
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static void exec_SUB(rv32 *, uint32_t insn);
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static void exec_SLL(rv32 *, uint32_t insn);
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static void exec_SLT(rv32 *, uint32_t insn);
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static void exec_SLTU(rv32 *, uint32_t insn);
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static void exec_XOR(rv32 *, uint32_t insn);
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static void exec_SRL(rv32 *, uint32_t insn);
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static void exec_SRA(rv32 *, uint32_t insn);
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static void exec_OR(rv32 *, uint32_t insn);
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static void exec_AND(rv32 *, uint32_t insn);
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//void printInsn(uint32_t insn);
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private:
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static const char *regNames[2][32];
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static const insn insns[];
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//void printInsnArgs(const insn *pi, uint32_t insn);
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int execInsn(int32_t insn);
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//void execInsn2(const insn *pi, uint32_t insn);
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int32_t reg[32];
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uint32_t pc;
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int trace;
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int regNamesABI; // true = print ABI names
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};
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#endif
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