HIFIVE1-VP/riscv/incl/iss/arch/rv32imac.h

////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2017, MINRES Technologies GmbH
// All rights reserved.
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// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
//    this list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
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//    may be used to endorse or promote products derived from this software
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// POSSIBILITY OF SUCH DAMAGE.
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// Created on: Tue Sep 26 17:41:14 CEST 2017
//             *      rv32imac.h Author: <CoreDSL Generator>
//
////////////////////////////////////////////////////////////////////////////////

#ifndef _RV32IMAC_H_
#define _RV32IMAC_H_

#include <iss/arch/traits.h>
#include <iss/arch_if.h>
#include <iss/vm_if.h>

namespace iss {
namespace arch {

struct rv32imac;

template <> struct traits<rv32imac> {

    enum constants {
        XLEN = 32,
        XLEN2 = 64,
        XLEN_BIT_MASK = 31,
        PCLEN = 32,
        fence = 0,
        fencei = 1,
        fencevmal = 2,
        fencevmau = 3,
        MISA_VAL = 1075056897,
        PGSIZE = 4096,
        PGMASK = 4095
    };

    enum reg_e {
        X0,
        X1,
        X2,
        X3,
        X4,
        X5,
        X6,
        X7,
        X8,
        X9,
        X10,
        X11,
        X12,
        X13,
        X14,
        X15,
        X16,
        X17,
        X18,
        X19,
        X20,
        X21,
        X22,
        X23,
        X24,
        X25,
        X26,
        X27,
        X28,
        X29,
        X30,
        X31,
        PC,
        NUM_REGS,
        NEXT_PC = NUM_REGS,
        TRAP_STATE,
        PENDING_TRAP,
        MACHINE_STATE,
        ICOUNT
    };

    using reg_t = uint32_t;

    using addr_t = uint32_t;

    using code_word_t = uint32_t; // TODO: check removal

    using virt_addr_t = iss::typed_addr_t<iss::VIRTUAL>;

    using phys_addr_t = iss::typed_addr_t<iss::PHYSICAL>;

    constexpr static unsigned reg_bit_width(unsigned r) {
        const uint32_t RV32IMAC_reg_size[] = {32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32,
                                              32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32,
                                              32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 64};
        return RV32IMAC_reg_size[r];
    }

    constexpr static unsigned reg_byte_offset(unsigned r) {
        const uint32_t RV32IMAC_reg_byte_offset[] = {0,   4,   8,   12,  16,  20,  24,  28,  32,  36,  40,  44,  48,
                                                     52,  56,  60,  64,  68,  72,  76,  80,  84,  88,  92,  96,  100,
                                                     104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 144, 152, 160};
        return RV32IMAC_reg_byte_offset[r];
    }

    enum sreg_flag_e { FLAGS };

    enum mem_type_e { MEM, CSR, FENCE, RES };
};

struct rv32imac : public arch_if {

    using virt_addr_t = typename traits<rv32imac>::virt_addr_t;
    using phys_addr_t = typename traits<rv32imac>::phys_addr_t;
    using reg_t = typename traits<rv32imac>::reg_t;
    using addr_t = typename traits<rv32imac>::addr_t;

    rv32imac();
    ~rv32imac() = default;

    void reset(uint64_t address = 0) override;

    uint8_t *get_regs_base_ptr() override;
    /// deprecated
    void get_reg(short idx, std::vector<uint8_t> &value) override {}
    void set_reg(short idx, const std::vector<uint8_t> &value) override {}
    /// deprecated
    bool get_flag(int flag) override { return false; }
    void set_flag(int, bool value) override{};
    /// deprecated
    void update_flags(operations op, uint64_t opr1, uint64_t opr2) override{};

    void notify_phase(exec_phase phase) override {
        if (phase == ISTART) {
            ++reg.icount;
            reg.PC = reg.NEXT_PC;
            reg.trap_state = reg.pending_trap;
        }
    }

    uint64_t get_icount() { return reg.icount; }

    virtual phys_addr_t v2p(const iss::addr_t &pc);

    virtual iss::sync_type needed_sync() const { return iss::PRE_SYNC; }

protected:
    struct RV32IMAC_regs {
        uint32_t X0;
        uint32_t X1;
        uint32_t X2;
        uint32_t X3;
        uint32_t X4;
        uint32_t X5;
        uint32_t X6;
        uint32_t X7;
        uint32_t X8;
        uint32_t X9;
        uint32_t X10;
        uint32_t X11;
        uint32_t X12;
        uint32_t X13;
        uint32_t X14;
        uint32_t X15;
        uint32_t X16;
        uint32_t X17;
        uint32_t X18;
        uint32_t X19;
        uint32_t X20;
        uint32_t X21;
        uint32_t X22;
        uint32_t X23;
        uint32_t X24;
        uint32_t X25;
        uint32_t X26;
        uint32_t X27;
        uint32_t X28;
        uint32_t X29;
        uint32_t X30;
        uint32_t X31;
        uint32_t PC;
        uint32_t NEXT_PC;
        uint32_t trap_state, pending_trap, machine_state;
        uint64_t icount;
    } reg;
};
}
}
#endif /* _RV32IMAC_H_ */