/*
 * Copyright 2020 Google Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution;
 * neither the name of the copyright holders nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 */

#ifndef __ARCH_MIPS_SE_WORKLOAD_HH__
#define __ARCH_MIPS_SE_WORKLOAD_HH__

#include "arch/mips/regs/int.hh"
#include "arch/mips/remote_gdb.hh"
#include "params/MipsSEWorkload.hh"
#include "sim/se_workload.hh"
#include "sim/syscall_abi.hh"
#include "sim/syscall_desc.hh"

namespace gem5
{

namespace MipsISA
{

class SEWorkload : public gem5::SEWorkload
{
  public:
    using Params = MipsSEWorkloadParams;

    SEWorkload(const Params &p, Addr page_shift) :
        gem5::SEWorkload(p, page_shift)
    {}

    void
    setSystem(System *sys) override
    {
        gem5::SEWorkload::setSystem(sys);
        gdb = BaseRemoteGDB::build<RemoteGDB>(system);
    }

    loader::Arch getArch() const override { return loader::Mips; }

    struct SyscallABI : public GenericSyscallABI64
    {
        static const std::vector<int> ArgumentRegs;
    };
};

} // namespace MipsISA

GEM5_DEPRECATED_NAMESPACE(GuestABI, guest_abi);
namespace guest_abi
{

template <>
struct Result<MipsISA::SEWorkload::SyscallABI, SyscallReturn>
{
    static void
    store(ThreadContext *tc, const SyscallReturn &ret)
    {
        if (ret.suppressed() || ret.needsRetry())
            return;

        if (ret.successful()) {
            // no error
            tc->setIntReg(MipsISA::SyscallSuccessReg, 0);
            tc->setIntReg(MipsISA::ReturnValueReg, ret.returnValue());
        } else {
            // got an error, return details
            tc->setIntReg(MipsISA::SyscallSuccessReg, (uint32_t)(-1));
            tc->setIntReg(MipsISA::ReturnValueReg, ret.errnoValue());
        }
        if (ret.count() > 1)
            tc->setIntReg(MipsISA::SyscallPseudoReturnReg, ret.value2());
    }
};

} // namespace guest_abi
} // namespace gem5

#endif // __ARCH_MIPS_SE_WORKLOAD_HH__