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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)
{
}
uint32_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)
{
}
uint32_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;
//Since these are processed inside templates and not in codeblocks,
//They aren't translated by the isa_parser. Their names begin with
//underscores so they don't cause conflicts.
uint32_t _PstatePriv = xc->readMiscReg(MISCREG_PSTATE_PRIV);
//If the processor isn't in privileged mode, fault out right away
if(!_PstatePriv)
return new PrivilegedOpcode;
%(code)s;
%(op_wb)s;
return NoFault;
}
}};
def template PrivTickExecute {{
Fault %(class_name)s::execute(%(CPU_exec_context)s *xc,
Trace::InstRecord *traceData) const
{
%(op_decl)s;
%(op_rd)s;
//Since these are processed inside templates and not in codeblocks,
//They aren't translated by the isa_parser. Their names begin with
//underscores so they don't cause conflicts.
uint32_t _PstatePriv = xc->readMiscReg(MISCREG_PSTATE_PRIV);
uint32_t _TickNpt = xc->readMiscReg(MISCREG_TICK_NPT);
//If the processor isn't in privileged mode, fault out right away
if(!_PstatePriv && _TickNpt)
return new PrivilegedAction;
%(code)s;
%(op_wb)s;
return NoFault;
}
}};
// Primary format for integer operate instructions:
def format Priv(code, *opt_flags) {{
uses_imm = (code.find('Rs2_or_imm13') != -1)
if uses_imm:
orig_code = code
code = re.sub(r'Rs2_or_imm13', 'Rs2', orig_code)
imm_code = re.sub(r'Rs2_or_imm13(\.\w+)?', 'imm', orig_code)
cblk = CodeBlock(code)
iop = InstObjParams(name, Name, 'Priv', cblk, opt_flags)
header_output = BasicDeclare.subst(iop)
decoder_output = BasicConstructor.subst(iop)
exec_output = PrivExecute.subst(iop)
if uses_imm:
imm_cblk = CodeBlock(imm_code)
imm_iop = InstObjParams(name, Name + 'Imm', 'PrivImm', imm_cblk,
opt_flags)
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)
}};
// Primary format for integer operate instructions:
def format PrivTick(code, *opt_flags) {{
uses_imm = (code.find('Rs2_or_imm13') != -1)
if uses_imm:
orig_code = code
code = re.sub(r'Rs2_or_imm13', 'Rs2', orig_code)
imm_code = re.sub(r'Rs2_or_imm13(\.\w+)?', 'imm', orig_code)
cblk = CodeBlock(code)
iop = InstObjParams(name, Name, 'PrivTick', cblk, opt_flags)
header_output = BasicDeclare.subst(iop)
decoder_output = BasicConstructor.subst(iop)
exec_output = PrivTickExecute.subst(iop)
if uses_imm:
imm_cblk = CodeBlock(imm_code)
imm_iop = InstObjParams(name, Name + 'Imm', 'PrivTickImm', imm_cblk,
opt_flags)
header_output += BasicDeclare.subst(imm_iop)
decoder_output += BasicConstructor.subst(imm_iop)
exec_output += PrivTickExecute.subst(imm_iop)
decode_block = Rb2OrImmDecode.subst(iop)
else:
decode_block = BasicDecode.subst(iop)
}};
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