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////////////////////////////////////////////////////////////////////
//
// Privilege mode instructions
//
output header {{
/**
* Base class for privelege mode operations.
*/
class Priv : public SparcStaticInst
{
protected:
// Constructor
Priv(const char *mnem, ExtMachInst _machInst, OpClass __opClass) :
SparcStaticInst(mnem, _machInst, __opClass)
{
}
std::string generateDisassembly(Addr pc,
const SymbolTable *symtab) const;
};
/**
* Base class for user mode "tick" access.
*/
class PrivTick : public SparcStaticInst
{
protected:
// Constructor
PrivTick(const char *mnem, ExtMachInst _machInst,
OpClass __opClass) :
SparcStaticInst(mnem, _machInst, __opClass)
{
}
std::string generateDisassembly(Addr pc,
const SymbolTable *symtab) const;
};
/**
* Base class for privelege mode operations with immediates.
*/
class PrivImm : public Priv
{
protected:
// Constructor
PrivImm(const char *mnem, ExtMachInst _machInst,
OpClass __opClass) :
Priv(mnem, _machInst, __opClass), imm(SIMM13)
{
}
int32_t imm;
};
/**
* Base class for user mode "tick" access with immediates.
*/
class PrivTickImm : public PrivTick
{
protected:
// Constructor
PrivTickImm(const char *mnem, ExtMachInst _machInst,
OpClass __opClass) :
PrivTick(mnem, _machInst, __opClass), imm(SIMM13)
{
}
int32_t imm;
};
}};
output decoder {{
std::string Priv::generateDisassembly(Addr pc,
const SymbolTable *symtab) const
{
return "Privileged Instruction";
}
std::string PrivTick::generateDisassembly(Addr pc,
const SymbolTable *symtab) const
{
return "Regular access to Tick";
}
}};
def template PrivExecute {{
Fault %(class_name)s::execute(%(CPU_exec_context)s *xc,
Trace::InstRecord *traceData) const
{
%(op_decl)s;
%(op_rd)s;
//If the processor isn't in privileged mode, fault out right away
if(%(check)s)
return new PrivilegedAction;
%(code)s;
%(op_wb)s;
return NoFault;
}
}};
let {{
def doPrivFormat(code, checkCode, name, Name, opt_flags):
(usesImm, code, immCode,
rString, iString) = splitOutImm(code)
iop = InstObjParams(name, Name, 'Priv', code,
opt_flags, ("check", checkCode))
header_output = BasicDeclare.subst(iop)
decoder_output = BasicConstructor.subst(iop)
exec_output = PrivExecute.subst(iop)
if usesImm:
imm_iop = InstObjParams(name, Name + 'Imm', 'PrivImm',
immCode, opt_flags, ("check", checkCode))
header_output += BasicDeclare.subst(imm_iop)
decoder_output += BasicConstructor.subst(imm_iop)
exec_output += PrivExecute.subst(imm_iop)
decode_block = ROrImmDecode.subst(iop)
else:
decode_block = BasicDecode.subst(iop)
return (header_output, decoder_output, exec_output, decode_block)
}};
// Primary format for integer operate instructions:
def format Priv(code, *opt_flags) {{
checkCode = "(!PstatePriv)"
(header_output, decoder_output,
exec_output, decode_block) = doPrivFormat(code,
checkCode, name, Name, opt_flags)
}};
// Primary format for integer operate instructions:
def format PrivTick(code, *opt_flags) {{
checkCode = "(!PstatePriv && TickNpt)"
(header_output, decoder_output,
exec_output, decode_block) = doPrivFormat(code,
checkCode, name, Name, opt_flags)
}};
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