diff options
| -rw-r--r-- | src/arch/x86/isa/microops/regop.isa | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/src/arch/x86/isa/microops/regop.isa b/src/arch/x86/isa/microops/regop.isa index ba996060c..d7d1e3063 100644 --- a/src/arch/x86/isa/microops/regop.isa +++ b/src/arch/x86/isa/microops/regop.isa @@ -236,6 +236,15 @@ output header {{ SegNoCheck, SegCSCheck, SegCallGateCheck, SegIntGateCheck, SegSSCheck, SegIretCheck, SegIntCSCheck }; + + enum LongModeDescriptorType { + LDT64 = 2, + AvailableTSS64 = 9, + BusyTSS64 = 0xb, + CallGate64 = 0xc, + IntGate64 = 0xe, + TrapGate64 = 0xf + }; }}; output decoder {{ @@ -1098,7 +1107,26 @@ let {{ class Wrdh(RegOp): code = ''' + SegDescriptor desc = SrcReg1; + uint64_t target = bits(SrcReg2, 31, 0) << 32; + switch(desc.type) { + case LDT64: + case AvailableTSS64: + case BusyTSS64: + replaceBits(target, 23, 0, desc.baseLow); + replaceBits(target, 31, 24, desc.baseHigh); + break; + case CallGate64: + case IntGate64: + case TrapGate64: + replaceBits(target, 15, 0, bits(desc, 15, 0)); + replaceBits(target, 31, 16, bits(desc, 63, 48)); + break; + default: + panic("Wrdh used with wrong descriptor type!\\n"); + } + DestReg = target; ''' class Wrtsc(WrRegOp): |