class FastCPU;
class FullCPU;
class Checkpoint;
+class ExecContext;
namespace LittleEndianGuest {};
-using namespace LittleEndianGuest;
#define TARGET_MIPS
namespace MipsISA
{
+ using namespace LittleEndianGuest;
+
typedef uint32_t MachInst;
typedef uint32_t MachInst;
typedef uint64_t ExtMachInst;
typedef uint8_t RegIndex;
// typedef uint64_t Addr;
- enum {
- MemoryEnd = 0xffffffffffffffffULL,
-
- NumIntRegs = 32,
- NumFloatRegs = 32,
- NumMiscRegs = 258, //account for hi,lo regs
-
- MaxRegsOfAnyType = 32,
- // Static instruction parameters
- MaxInstSrcRegs = 3,
- MaxInstDestRegs = 2,
-
- // semantically meaningful register indices
- ZeroReg = 0, // architecturally meaningful
- // the rest of these depend on the ABI
- StackPointerReg = 30,
- GlobalPointerReg = 29,
- ProcedureValueReg = 27,
- ReturnAddressReg = 26,
- ReturnValueReg = 0,
- FramePointerReg = 15,
- ArgumentReg0 = 16,
- ArgumentReg1 = 17,
- ArgumentReg2 = 18,
- ArgumentReg3 = 19,
- ArgumentReg4 = 20,
- ArgumentReg5 = 21,
- SyscallNumReg = ReturnValueReg,
- SyscallPseudoReturnReg = ArgumentReg4,
- SyscallSuccessReg = 19,
- LogVMPageSize = 13, // 8K bytes
- VMPageSize = (1 << LogVMPageSize),
-
- BranchPredAddrShiftAmt = 2, // instructions are 4-byte aligned
-
- WordBytes = 4,
- HalfwordBytes = 2,
- ByteBytes = 1,
- DepNA = 0,
- };
+
+ // Constants Related to the number of registers
+
+ const int NumIntArchRegs = 32;
+ const int NumPALShadowRegs = 8;
+ const int NumFloatArchRegs = 32;
+ // @todo: Figure out what this number really should be.
+ const int NumMiscArchRegs = 32;
+
+ const int NumIntRegs = NumIntArchRegs + NumPALShadowRegs;
+ const int NumFloatRegs = NumFloatArchRegs;
+ const int NumMiscRegs = NumMiscArchRegs;
+
+ const int TotalNumRegs = NumIntRegs + NumFloatRegs +
+ NumMiscRegs + 0/*NumInternalProcRegs*/;
+
+ const int TotalDataRegs = NumIntRegs + NumFloatRegs;
+
+ // Static instruction parameters
+ const int MaxInstSrcRegs = 3;
+ const int MaxInstDestRegs = 2;
+
+ // semantically meaningful register indices
+ const int ZeroReg = 0;
+ const int AssemblerReg = 1;
+ const int ReturnValueReg1 = 2;
+ const int ReturnValueReg2 = 3;
+ const int ArgumentReg0 = 4;
+ const int ArgumentReg1 = 5;
+ const int ArgumentReg2 = 6;
+ const int ArgumentReg3 = 7;
+ const int KernelReg0 = 26;
+ const int KernelReg1 = 27;
+ const int GlobalPointerReg = 28;
+ const int StackPointerReg = 29;
+ const int FramePointerReg = 30;
+ const int ReturnAddressReg = 31;
+
+ const int SyscallNumReg = ReturnValueReg1;
+ const int SyscallPseudoReturnReg = ReturnValueReg1;
+ const int SyscallSuccessReg = ReturnValueReg1;
+
+ const int LogVMPageSize = 13; // 8K bytes
+ const int VMPageSize = (1 << LogVMPageSize);
+
+ const int BranchPredAddrShiftAmt = 2; // instructions are 4-byte aligned
+
+ const int MachineBytes = 4;
+ const int WordBytes = 4;
+ const int HalfwordBytes = 2;
+ const int ByteBytes = 1;
+
// These enumerate all the registers for dependence tracking.
enum DependenceTags {
};
typedef uint64_t IntReg;
- typedef IntReg IntRegFile[NumIntRegs];
- // floating point register file entry type
+ class IntRegFile
+ {
+ protected:
+ IntReg regs[NumIntRegs];
+
+ public:
+ IntReg readReg(int intReg)
+ {
+ return regs[intReg];
+ }
+
+ Fault setReg(int intReg, const IntReg &val)
+ {
+ regs[intReg] = val;
+ return NoFault;
+ }
+
+ void serialize(std::ostream &os);
+
+ void unserialize(Checkpoint *cp, const std::string §ion);
+
+ };
+
+/* floating point register file entry type
typedef union {
uint64_t q;
double d;
- } FloatReg;
+ } FloatReg;*/
- typedef union {
+ typedef double FloatReg;
+ typedef uint64_t FloatRegBits;
+
+/*typedef union {
uint64_t q[NumFloatRegs]; // integer qword view
double d[NumFloatRegs]; // double-precision floating point view
- } FloatRegFile;
+ } FloatRegFile;*/
+
+ class FloatRegFile
+ {
+ protected:
+
+ FloatRegBits q[NumFloatRegs]; // integer qword view
+ double d[NumFloatRegs]; // double-precision floating point view
+
+ public:
+
+ FloatReg readReg(int floatReg)
+ {
+ return d[floatReg];
+ }
+
+ FloatReg readReg(int floatReg, int width)
+ {
+ return readReg(floatReg);
+ }
+
+ FloatRegBits readRegBits(int floatReg)
+ {
+ return q[floatReg];
+ }
+
+ FloatRegBits readRegBits(int floatReg, int width)
+ {
+ return readRegBits(floatReg);
+ }
+
+ Fault setReg(int floatReg, const FloatReg &val)
+ {
+ d[floatReg] = val;
+ return NoFault;
+ }
+
+ Fault setReg(int floatReg, const FloatReg &val, int width)
+ {
+ return setReg(floatReg, val);
+ }
+
+ Fault setRegBits(int floatReg, const FloatRegBits &val)
+ {
+ q[floatReg] = val;
+ return NoFault;
+ }
+
+ Fault setRegBits(int floatReg, const FloatRegBits &val, int width)
+ {
+ return setRegBits(floatReg, val);
+ }
+
+ void serialize(std::ostream &os);
+
+ void unserialize(Checkpoint *cp, const std::string §ion);
+
+ };
+
+ void copyRegs(ExecContext *src, ExecContext *dest);
// cop-0/cop-1 system control register file
typedef uint64_t MiscReg;
};
#endif
- enum {
- TotalNumRegs =
- NumIntRegs + NumFloatRegs + NumMiscRegs + NumInternalProcRegs
- };
-
- enum {
- TotalDataRegs = NumIntRegs + NumFloatRegs
- };
-
typedef union {
IntReg intreg;
FloatReg fpreg;
MiscReg ctrlreg;
} AnyReg;
- struct RegFile {
+ class RegFile {
+ protected:
IntRegFile intRegFile; // (signed) integer register file
FloatRegFile floatRegFile; // floating point register file
- MiscRegFile miscRegs; // control register file
+ MiscRegFile miscRegFile; // control register file
+
+ public:
+ void clear()
+ {
+ bzero(&intRegFile, sizeof(intRegFile));
+ bzero(&floatRegFile, sizeof(floatRegFile));
+ bzero(&miscRegFile, sizeof(miscRegFile));
+ }
+
+ MiscReg readMiscReg(int miscReg)
+ {
+ return miscRegFile.readReg(miscReg);
+ }
+
+ MiscReg readMiscRegWithEffect(int miscReg,
+ Fault &fault, ExecContext *xc)
+ {
+ fault = NoFault;
+ return miscRegFile.readRegWithEffect(miscReg, fault, xc);
+ }
+
+ Fault setMiscReg(int miscReg, const MiscReg &val)
+ {
+ return miscRegFile.setReg(miscReg, val);
+ }
+
+ Fault setMiscRegWithEffect(int miscReg, const MiscReg &val,
+ ExecContext * xc)
+ {
+ return miscRegFile.setRegWithEffect(miscReg, val, xc);
+ }
+
+ FloatReg readFloatReg(int floatReg)
+ {
+ return floatRegFile.readReg(floatReg);
+ }
+
+ FloatReg readFloatReg(int floatReg, int width)
+ {
+ return readFloatReg(floatReg);
+ }
+
+ FloatRegBits readFloatRegBits(int floatReg)
+ {
+ return floatRegFile.readRegBits(floatReg);
+ }
+
+ FloatRegBits readFloatRegBits(int floatReg, int width)
+ {
+ return readFloatRegBits(floatReg);
+ }
+
+ Fault setFloatReg(int floatReg, const FloatReg &val)
+ {
+ return floatRegFile.setReg(floatReg, val);
+ }
+
+ Fault setFloatReg(int floatReg, const FloatReg &val, int width)
+ {
+ return setFloatReg(floatReg, val);
+ }
+
+ Fault setFloatRegBits(int floatReg, const FloatRegBits &val)
+ {
+ return floatRegFile.setRegBits(floatReg, val);
+ }
+
+ Fault setFloatRegBits(int floatReg, const FloatRegBits &val, int width)
+ {
+ return setFloatRegBits(floatReg, val);
+ }
+
+ IntReg readIntReg(int intReg)
+ {
+ return intRegFile.readReg(intReg);
+ }
+
+ Fault setIntReg(int intReg, const IntReg &val)
+ {
+ return intRegFile.setReg(intReg, val);
+ }
+ protected:
Addr pc; // program counter
Addr npc; // next-cycle program counter
Addr nnpc; // next-next-cycle program counter
// used to implement branch delay slot
// not real register
+ public:
+ Addr readPC()
+ {
+ return pc;
+ }
+
+ void setPC(Addr val)
+ {
+ pc = val;
+ }
+
+ Addr readNextPC()
+ {
+ return npc;
+ }
+
+ void setNextPC(Addr val)
+ {
+ npc = val;
+ }
+
+ Addr readNextNPC()
+ {
+ return nnpc;
+ }
+
+ void setNextNPC(Addr val)
+ {
+ nnpc = val;
+ }
MiscReg hi; // MIPS HI Register
MiscReg lo; // MIPS LO Register
void createCP0Regs();
void coldReset();
+
+ typedef int ContextParam;
+ typedef int ContextVal;
+
+ void changeContext(ContextParam param, ContextVal val)
+ {
+ }
};
StaticInstPtr decodeInst(ExtMachInst);
static inline void setSyscallReturn(SyscallReturn return_value, RegFile *regs)
{
- // check for error condition. SPARC syscall convention is to
- // indicate success/failure in reg the carry bit of the ccr
- // and put the return value itself in the standard return value reg ().
+ // check for error condition. Alpha syscall convention is to
+ // indicate success/failure in reg a3 (r19) and put the
+ // return value itself in the standard return value reg (v0).
if (return_value.successful()) {
// no error
- //regs->miscRegFile.ccrFields.iccFields.c = 0;
- regs->intRegFile[ReturnValueReg] = return_value.value();
+ regs->setIntReg(ReturnValueReg1, 0);
+ regs->setIntReg(ReturnValueReg2, return_value.value());
} else {
// got an error, return details
- //regs->miscRegFile.ccrFields.iccFields.c = 1;
- regs->intRegFile[ReturnValueReg] = -return_value.value();
+ regs->setIntReg(ReturnValueReg1, (IntReg) -1);
+ regs->setIntReg(ReturnValueReg2, -return_value.value());
}
+
+ //regs->intRegFile[ReturnValueReg1] = (IntReg)return_value;
+ //panic("Returning from syscall\n");
}
// Machine operations
projects / gem5.git / blobdiff