isa/microops/debug.isa

// Copyright (c) 2008 The Hewlett-Packard Development Company
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//
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// this software without specific prior written permission.
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// Authors: Gabe Black

//////////////////////////////////////////////////////////////////////////
//
// Debug Microops
//
//////////////////////////////////////////////////////////////////////////

output header {{
    class MicroDebugBase : public X86ISA::X86MicroopBase
    {
      protected:
        typedef GenericISA::M5DebugFault::DebugFunc DebugFunc;
        DebugFunc func;
        std::string message;
        uint8_t cc;

      public:
        MicroDebugBase(ExtMachInst machInst, const char * mnem,
                const char * instMnem, uint64_t setFlags,
                DebugFunc _func, std::string _message, uint8_t _cc) :
            X86MicroopBase(machInst, mnem, instMnem, setFlags, No_OpClass),
                    func(_func), message(_message), cc(_cc)
        {}

        std::string
        generateDisassembly(Addr pc, const SymbolTable *symtab) const
        {
            std::stringstream response;

            printMnemonic(response, instMnem, mnemonic);
            response << "\"" << message << "\"";

            return response.str();
        }
    };
}};

def template MicroDebugDeclare {{
    class %(class_name)s : public %(base_class)s
    {
      public:
        %(class_name)s(ExtMachInst _machInst, const char * instMnem,
                uint64_t setFlags, std::string _message, uint8_t _cc);

        %(BasicExecDeclare)s
    };
}};

def template MicroDebugExecute {{
        Fault
        %(class_name)s::execute(CPU_EXEC_CONTEXT *xc,
                Trace::InstRecord *traceData) const
        {
            %(op_decl)s
            %(op_rd)s
            if (%(cond_test)s) {
                return std::make_shared<GenericISA::M5DebugFault>(func,
                                                                  message);
            } else {
                return NoFault;
            }
        }
}};

def template MicroDebugConstructor {{
    %(class_name)s::%(class_name)s(
            ExtMachInst machInst, const char * instMnem, uint64_t setFlags,
            std::string _message, uint8_t _cc) :
        %(base_class)s(machInst, "%(func)s", instMnem,
                setFlags, %(func_num)s, _message, _cc)
    {
        %(constructor)s;
    }
}};

let {{
    class MicroDebug(X86Microop):
        def __init__(self, message, flags=None):
            self.message = message
            if flags:
                if not isinstance(flags, (list, tuple)):
                    raise Exception, "flags must be a list or tuple of flags"
                self.cond = " | ".join(flags)
                self.className += "Flags"
            else:
                self.cond = "0"

        def getAllocator(self, microFlags):
            allocator = '''new %(class_name)s(machInst, macrocodeBlock,
                    %(flags)s, "%(message)s", %(cc)s)''' % {
                "class_name" : self.className,
                "flags" : self.microFlagsText(microFlags),
                "message" : self.message,
                "cc" : self.cond}
            return allocator

    exec_output = ""
    header_output = ""
    decoder_output = ""

    def buildDebugMicro(func, func_num):
        global exec_output, header_output, decoder_output

        iop = InstObjParams(func, "Micro%sFlags" % func.capitalize(),
                "MicroDebugBase",
                {"code": "",
                 "func": func,
                 "func_num": "GenericISA::M5DebugFault::%s" % func_num,
                 "cond_test": "checkCondition(ccFlagBits | cfofBits | \
                                              dfBit | ecfBit | ezfBit, cc)"})
        exec_output += MicroDebugExecute.subst(iop)
        header_output += MicroDebugDeclare.subst(iop)
        decoder_output += MicroDebugConstructor.subst(iop)

        iop = InstObjParams(func, "Micro%s" % func.capitalize(),
                "MicroDebugBase",
                {"code": "",
                 "func": func,
                 "func_num": "GenericISA::M5DebugFault::%s" % func_num,
                 "cond_test": "true"})
        exec_output += MicroDebugExecute.subst(iop)
        header_output += MicroDebugDeclare.subst(iop)
        decoder_output += MicroDebugConstructor.subst(iop)

        class MicroDebugChild(MicroDebug):
            className = "Micro%s" % func.capitalize()

        global microopClasses
        microopClasses[func] = MicroDebugChild

    buildDebugMicro("panic", "PanicFunc")
    buildDebugMicro("fatal", "FatalFunc")
    buildDebugMicro("warn", "WarnFunc")
    buildDebugMicro("warn_once", "WarnOnceFunc")
}};