events.hh

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/*
 * Copyright (c) 2016 ARM Limited
 * All rights reserved
 *
 * The license below extends only to copyright in the software and shall
 * not be construed as granting a license to any other intellectual
 * property including but not limited to intellectual property relating
 * to a hardware implementation of the functionality of the software
 * licensed hereunder.  You may use the software subject to the license
 * terms below provided that you ensure that this notice is replicated
 * unmodified and in its entirety in all distributions of the software,
 * modified or unmodified, in source code or in binary form.
 *
 * Copyright (c) 2004-2006 The Regents of The University of Michigan
 * All rights reserved.
 *
 * 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;
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#ifndef __KERN_LINUX_EVENTS_HH__
#define __KERN_LINUX_EVENTS_HH__
 
#include <functional>
#include <string>
 
#include "base/compiler.hh"
#include "base/trace.hh"
#include "debug/DebugPrintf.hh"
#include "kern/linux/printk.hh"
#include "kern/system_events.hh"
#include "mem/se_translating_port_proxy.hh"
#include "sim/guest_abi.hh"
 
namespace gem5
{
 
class ThreadContext;
 
namespace linux
{
 
template <typename ABI, typename Base>
class DebugPrintk : public Base
{
  public:
    using Base::Base;
    void
    process(ThreadContext *tc) override
    {
        if (debug::DebugPrintf) {
            std::string str;
            std::function<int(ThreadContext *, Addr, PrintkVarArgs)> func =
                [&str](ThreadContext *tc, Addr format_ptr,
                    PrintkVarArgs args) -> int {
                return printk(str, tc, format_ptr, args);
            };
            invokeSimcall<ABI>(tc, func);
            DPRINTFN("%s", str);
        }
        Base::process(tc);
    }
};
 
class DmesgDump : public PCEvent
{
  protected:
    std::string fname;
 
  public:
    DmesgDump(PCEventScope *s, const std::string &desc, Addr addr,
              const std::string &_fname) :
        PCEvent(s, desc, addr), fname(_fname)
    {}
    void process(ThreadContext *tc) override;
};
 
class KernelPanic : public PCEvent
{
  protected:
    std::string fname;
 
  public:
    KernelPanic(PCEventScope *s, const std::string &desc, Addr addr,
                const std::string &_fname) :
        PCEvent(s, desc, addr), fname(_fname)
    {}
    void process(ThreadContext *tc) override;
};
 
void onUDelay(ThreadContext *tc, uint64_t div, uint64_t mul, uint64_t time);
 
template <typename ABI, typename Base>
class SkipUDelay : public Base
{
  private:
    uint64_t argDivToNs;
 
    uint64_t argMultToNs;
 
  public:
    SkipUDelay(PCEventScope *s, const std::string &desc, Addr addr,
            uint64_t mult, uint64_t div) :
        Base(s, desc, addr), argDivToNs(div), argMultToNs(mult)
    {}
 
    void
    process(ThreadContext *tc) override
    {
        // Use Addr since it's handled specially and will act as a natively
        // sized data type.
        std::function<void(ThreadContext *, Addr)> call_udelay =
            [this](ThreadContext *tc, Addr time) {
            onUDelay(tc, argDivToNs, argMultToNs, time);
        };
        invokeSimcall<ABI>(tc, call_udelay);
        Base::process(tc);
    }
};
 
} // namespace linux
} // namespace gem5
 
#endif // __KERN_LINUX_EVENTS_HH__