/* * Copyright (c) 2007 The Hewlett-Packard Development Company * All rights reserved. * * Redistribution and use of this software in source and binary forms, * with or without modification, are permitted provided that the * following conditions are met: * * The software must be used only for Non-Commercial Use which means any * use which is NOT directed to receiving any direct monetary * compensation for, or commercial advantage from such use. Illustrative * examples of non-commercial use are academic research, personal study, * teaching, education and corporate research & development. * Illustrative examples of commercial use are distributing products for * commercial advantage and providing services using the software for * commercial advantage. * * If you wish to use this software or functionality therein that may be * covered by patents for commercial use, please contact: * Director of Intellectual Property Licensing * Office of Strategy and Technology * Hewlett-Packard Company * 1501 Page Mill Road * Palo Alto, California 94304 * * Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. Redistributions * in binary form must reproduce the above copyright notice, this list of * conditions and the following disclaimer in the documentation and/or * other materials provided with the distribution. Neither the name of * the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its * contributors may be used to endorse or promote products derived from * this software without specific prior written permission. No right of * sublicense is granted herewith. Derivatives of the software and * output created using the software may be prepared, but only for * Non-Commercial Uses. Derivatives of the software may be shared with * others provided: (i) the others agree to abide by the list of * conditions herein which includes the Non-Commercial Use restrictions; * and (ii) such Derivatives of the software include the above copyright * notice to acknowledge the contribution from this software where * applicable, this list of conditions and the disclaimer below. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * Authors: Gabe Black */ #ifndef __ARCH_X86_MISCREGS_HH__ #define __ARCH_X86_MISCREGS_HH__ #include "arch/x86/segmentregs.hh" #include "arch/x86/x86_traits.hh" #include "base/bitunion.hh" //These get defined in some system headers (at least termbits.h). That confuses //things here significantly. #undef CR0 #undef CR2 #undef CR3 namespace X86ISA { enum CondFlagBit { CFBit = 1 << 0, PFBit = 1 << 2, ECFBit = 1 << 3, AFBit = 1 << 4, EZFBit = 1 << 5, ZFBit = 1 << 6, SFBit = 1 << 7, DFBit = 1 << 10, OFBit = 1 << 11 }; enum MiscRegIndex { // Control registers // Most of these are invalid. MISCREG_CR_BASE, MISCREG_CR0 = MISCREG_CR_BASE, MISCREG_CR1, MISCREG_CR2, MISCREG_CR3, MISCREG_CR4, MISCREG_CR5, MISCREG_CR6, MISCREG_CR7, MISCREG_CR8, MISCREG_CR9, MISCREG_CR10, MISCREG_CR11, MISCREG_CR12, MISCREG_CR13, MISCREG_CR14, MISCREG_CR15, // Debug registers MISCREG_DR_BASE = MISCREG_CR_BASE + NumCRegs, MISCREG_DR0 = MISCREG_DR_BASE, MISCREG_DR1, MISCREG_DR2, MISCREG_DR3, MISCREG_DR4, MISCREG_DR5, MISCREG_DR6, MISCREG_DR7, // Flags register MISCREG_RFLAGS = MISCREG_DR_BASE + NumDRegs, /* * Model Specific Registers */ // Time stamp counter MISCREG_TSC, MISCREG_MTRRCAP, MISCREG_SYSENTER_CS, MISCREG_SYSENTER_ESP, MISCREG_SYSENTER_EIP, MISCREG_MCG_CAP, MISCREG_MCG_STATUS, MISCREG_MCG_CTL, MISCREG_DEBUG_CTL_MSR, MISCREG_LAST_BRANCH_FROM_IP, MISCREG_LAST_BRANCH_TO_IP, MISCREG_LAST_EXCEPTION_FROM_IP, MISCREG_LAST_EXCEPTION_TO_IP, MISCREG_MTRR_PHYS_BASE_BASE, MISCREG_MTRR_PHYS_BASE_0 = MISCREG_MTRR_PHYS_BASE_BASE, MISCREG_MTRR_PHYS_BASE_1, MISCREG_MTRR_PHYS_BASE_2, MISCREG_MTRR_PHYS_BASE_3, MISCREG_MTRR_PHYS_BASE_4, MISCREG_MTRR_PHYS_BASE_5, MISCREG_MTRR_PHYS_BASE_6, MISCREG_MTRR_PHYS_BASE_7, MISCREG_MTRR_PHYS_MASK_BASE, MISCREG_MTRR_PHYS_MASK_0 = MISCREG_MTRR_PHYS_MASK_BASE, MISCREG_MTRR_PHYS_MASK_1, MISCREG_MTRR_PHYS_MASK_2, MISCREG_MTRR_PHYS_MASK_3, MISCREG_MTRR_PHYS_MASK_4, MISCREG_MTRR_PHYS_MASK_5, MISCREG_MTRR_PHYS_MASK_6, MISCREG_MTRR_PHYS_MASK_7, MISCREG_MTRR_FIX_64K_00000, MISCREG_MTRR_FIX_16K_80000, MISCREG_MTRR_FIX_16K_A0000, MISCREG_MTRR_FIX_4K_C0000, MISCREG_MTRR_FIX_4K_C8000, MISCREG_MTRR_FIX_4K_D0000, MISCREG_MTRR_FIX_4K_D8000, MISCREG_MTRR_FIX_4K_E0000, MISCREG_MTRR_FIX_4K_E8000, MISCREG_MTRR_FIX_4K_F0000, MISCREG_MTRR_FIX_4K_F8000, MISCREG_PAT, MISCREG_DEF_TYPE, MISCREG_MC_CTL_BASE, MISCREG_MC0_CTL = MISCREG_MC_CTL_BASE, MISCREG_MC1_CTL, MISCREG_MC2_CTL, MISCREG_MC3_CTL, MISCREG_MC4_CTL, MISCREG_MC_STATUS_BASE, MISCREG_MC0_STATUS = MISCREG_MC_STATUS_BASE, MISCREG_MC1_STATUS, MISCREG_MC2_STATUS, MISCREG_MC3_STATUS, MISCREG_MC4_STATUS, MISCREG_MC_ADDR_BASE, MISCREG_MC0_ADDR = MISCREG_MC_ADDR_BASE, MISCREG_MC1_ADDR, MISCREG_MC2_ADDR, MISCREG_MC3_ADDR, MISCREG_MC4_ADDR, MISCREG_MC_MISC_BASE, MISCREG_MC0_MISC = MISCREG_MC_MISC_BASE, MISCREG_MC1_MISC, MISCREG_MC2_MISC, MISCREG_MC3_MISC, MISCREG_MC4_MISC, // Extended feature enable register MISCREG_EFER, MISCREG_STAR, MISCREG_LSTAR, MISCREG_CSTAR, MISCREG_SF_MASK, MISCREG_KERNEL_GS_BASE, MISCREG_TSC_AUX, MISCREG_PERF_EVT_SEL_BASE, MISCREG_PERF_EVT_SEL0 = MISCREG_PERF_EVT_SEL_BASE, MISCREG_PERF_EVT_SEL1, MISCREG_PERF_EVT_SEL2, MISCREG_PERF_EVT_SEL3, MISCREG_PERF_EVT_CTR_BASE, MISCREG_PERF_EVT_CTR0 = MISCREG_PERF_EVT_CTR_BASE, MISCREG_PERF_EVT_CTR1, MISCREG_PERF_EVT_CTR2, MISCREG_PERF_EVT_CTR3, MISCREG_SYSCFG, MISCREG_IORR_BASE_BASE, MISCREG_IORR_BASE0 = MISCREG_IORR_BASE_BASE, MISCREG_IORR_BASE1, MISCREG_IORR_MASK_BASE, MISCREG_IORR_MASK0 = MISCREG_IORR_MASK_BASE, MISCREG_IORR_MASK1, MISCREG_TOP_MEM, MISCREG_TOP_MEM2, MISCREG_VM_CR, MISCREG_IGNNE, MISCREG_SMM_CTL, MISCREG_VM_HSAVE_PA, /* * Segment registers */ // Segment selectors MISCREG_SEG_SEL_BASE, MISCREG_ES = MISCREG_SEG_SEL_BASE, MISCREG_CS, MISCREG_SS, MISCREG_DS, MISCREG_FS, MISCREG_GS, MISCREG_HS, MISCREG_TSL, MISCREG_TSG, MISCREG_LS, MISCREG_MS, MISCREG_TR, MISCREG_IDTR, // Hidden segment base field MISCREG_SEG_BASE_BASE = MISCREG_SEG_SEL_BASE + NUM_SEGMENTREGS, MISCREG_ES_BASE = MISCREG_SEG_BASE_BASE, MISCREG_CS_BASE, MISCREG_SS_BASE, MISCREG_DS_BASE, MISCREG_FS_BASE, MISCREG_GS_BASE, MISCREG_HS_BASE, MISCREG_TSL_BASE, MISCREG_TSG_BASE, MISCREG_LS_BASE, MISCREG_MS_BASE, MISCREG_TR_BASE, MISCREG_IDTR_BASE, // The effective segment base, ie what is actually added to an // address. In 64 bit mode this can be different from the above, // namely 0. MISCREG_SEG_EFF_BASE_BASE = MISCREG_SEG_BASE_BASE + NUM_SEGMENTREGS, MISCREG_ES_EFF_BASE = MISCREG_SEG_EFF_BASE_BASE, MISCREG_CS_EFF_BASE, MISCREG_SS_EFF_BASE, MISCREG_DS_EFF_BASE, MISCREG_FS_EFF_BASE, MISCREG_GS_EFF_BASE, MISCREG_HS_EFF_BASE, MISCREG_TSL_EFF_BASE, MISCREG_TSG_EFF_BASE, MISCREG_LS_EFF_BASE, MISCREG_MS_EFF_BASE, MISCREG_TR_EFF_BASE, MISCREG_IDTR_EFF_BASE, // Hidden segment limit field MISCREG_SEG_LIMIT_BASE = MISCREG_SEG_EFF_BASE_BASE + NUM_SEGMENTREGS, MISCREG_ES_LIMIT = MISCREG_SEG_LIMIT_BASE, MISCREG_CS_LIMIT, MISCREG_SS_LIMIT, MISCREG_DS_LIMIT, MISCREG_FS_LIMIT, MISCREG_GS_LIMIT, MISCREG_HS_LIMIT, MISCREG_TSL_LIMIT, MISCREG_TSG_LIMIT, MISCREG_LS_LIMIT, MISCREG_MS_LIMIT, MISCREG_TR_LIMIT, MISCREG_IDTR_LIMIT, // Hidden segment limit attributes MISCREG_SEG_ATTR_BASE = MISCREG_SEG_LIMIT_BASE + NUM_SEGMENTREGS, MISCREG_ES_ATTR = MISCREG_SEG_ATTR_BASE, MISCREG_CS_ATTR, MISCREG_SS_ATTR, MISCREG_DS_ATTR, MISCREG_FS_ATTR, MISCREG_GS_ATTR, MISCREG_HS_ATTR, MISCREG_TSL_ATTR, MISCREG_TSG_ATTR, MISCREG_LS_ATTR, MISCREG_MS_ATTR, MISCREG_TR_ATTR, MISCREG_IDTR_ATTR, // Floating point control registers MISCREG_X87_TOP = MISCREG_SEG_ATTR_BASE + NUM_SEGMENTREGS, //XXX Add "Model-Specific Registers" MISCREG_PCI_CONFIG_ADDRESS, NUM_MISCREGS }; static inline MiscRegIndex MISCREG_CR(int index) { return (MiscRegIndex)(MISCREG_CR_BASE + index); } static inline MiscRegIndex MISCREG_DR(int index) { return (MiscRegIndex)(MISCREG_DR_BASE + index); } static inline MiscRegIndex MISCREG_MTRR_PHYS_BASE(int index) { return (MiscRegIndex)(MISCREG_MTRR_PHYS_BASE_BASE + index); } static inline MiscRegIndex MISCREG_MTRR_PHYS_MASK(int index) { return (MiscRegIndex)(MISCREG_MTRR_PHYS_MASK_BASE + index); } static inline MiscRegIndex MISCREG_MC_CTL(int index) { return (MiscRegIndex)(MISCREG_MC_CTL_BASE + index); } static inline MiscRegIndex MISCREG_MC_STATUS(int index) { return (MiscRegIndex)(MISCREG_MC_STATUS_BASE + index); } static inline MiscRegIndex MISCREG_MC_ADDR(int index) { return (MiscRegIndex)(MISCREG_MC_ADDR_BASE + index); } static inline MiscRegIndex MISCREG_MC_MISC(int index) { return (MiscRegIndex)(MISCREG_MC_MISC_BASE + index); } static inline MiscRegIndex MISCREG_PERF_EVT_SEL(int index) { return (MiscRegIndex)(MISCREG_PERF_EVT_SEL_BASE + index); } static inline MiscRegIndex MISCREG_PERF_EVT_CTR(int index) { return (MiscRegIndex)(MISCREG_PERF_EVT_CTR_BASE + index); } static inline MiscRegIndex MISCREG_IORR_BASE(int index) { return (MiscRegIndex)(MISCREG_IORR_BASE_BASE + index); } static inline MiscRegIndex MISCREG_IORR_MASK(int index) { return (MiscRegIndex)(MISCREG_IORR_MASK_BASE + index); } static inline MiscRegIndex MISCREG_SEG_SEL(int index) { return (MiscRegIndex)(MISCREG_SEG_SEL_BASE + index); } static inline MiscRegIndex MISCREG_SEG_BASE(int index) { return (MiscRegIndex)(MISCREG_SEG_BASE_BASE + index); } static inline MiscRegIndex MISCREG_SEG_EFF_BASE(int index) { return (MiscRegIndex)(MISCREG_SEG_EFF_BASE_BASE + index); } static inline MiscRegIndex MISCREG_SEG_LIMIT(int index) { return (MiscRegIndex)(MISCREG_SEG_LIMIT_BASE + index); } static inline MiscRegIndex MISCREG_SEG_ATTR(int index) { return (MiscRegIndex)(MISCREG_SEG_ATTR_BASE + index); } /** * A type to describe the condition code bits of the RFLAGS register, * plus two flags, EZF and ECF, which are only visible to microcode. */ BitUnion64(CCFlagBits) Bitfield<11> of; Bitfield<7> sf; Bitfield<6> zf; Bitfield<5> ezf; Bitfield<4> af; Bitfield<3> ecf; Bitfield<2> pf; Bitfield<0> cf; EndBitUnion(CCFlagBits) /** * RFLAGS */ BitUnion64(RFLAGS) Bitfield<21> id; // ID Flag Bitfield<20> vip; // Virtual Interrupt Pending Bitfield<19> vif; // Virtual Interrupt Flag Bitfield<18> ac; // Alignment Check Bitfield<17> vm; // Virtual-8086 Mode Bitfield<16> rf; // Resume Flag Bitfield<14> nt; // Nested Task Bitfield<13, 12> iopl; // I/O Privilege Level Bitfield<11> of; // Overflow Flag Bitfield<10> df; // Direction Flag Bitfield<9> intf; // Interrupt Flag Bitfield<8> tf; // Trap Flag Bitfield<7> sf; // Sign Flag Bitfield<6> zf; // Zero Flag Bitfield<4> af; // Auxiliary Flag Bitfield<2> pf; // Parity Flag Bitfield<0> cf; // Carry Flag EndBitUnion(RFLAGS) /** * Control registers */ BitUnion64(CR0) Bitfield<31> pg; // Paging Bitfield<30> cd; // Cache Disable Bitfield<29> nw; // Not Writethrough Bitfield<18> am; // Alignment Mask Bitfield<16> wp; // Write Protect Bitfield<5> ne; // Numeric Error Bitfield<4> et; // Extension Type Bitfield<3> ts; // Task Switched Bitfield<2> em; // Emulation Bitfield<1> mp; // Monitor Coprocessor Bitfield<0> pe; // Protection Enabled EndBitUnion(CR0) // Page Fault Virtual Address BitUnion64(CR2) Bitfield<31, 0> legacy; EndBitUnion(CR2) BitUnion64(CR3) Bitfield<51, 12> longPdtb; // Long Mode Page-Directory-Table // Base Address Bitfield<31, 12> pdtb; // Non-PAE Addressing Page-Directory-Table // Base Address Bitfield<31, 5> paePdtb; // PAE Addressing Page-Directory-Table // Base Address Bitfield<4> pcd; // Page-Level Cache Disable Bitfield<3> pwt; // Page-Level Writethrough EndBitUnion(CR3) BitUnion64(CR4) Bitfield<10> osxmmexcpt; // Operating System Unmasked // Exception Support Bitfield<9> osfxsr; // Operating System FXSave/FSRSTOR Support Bitfield<8> pce; // Performance-Monitoring Counter Enable Bitfield<7> pge; // Page-Global Enable Bitfield<6> mce; // Machine Check Enable Bitfield<5> pae; // Physical-Address Extension Bitfield<4> pse; // Page Size Extensions Bitfield<3> de; // Debugging Extensions Bitfield<2> tsd; // Time Stamp Disable Bitfield<1> pvi; // Protected-Mode Virtual Interrupts Bitfield<0> vme; // Virtual-8086 Mode Extensions EndBitUnion(CR4) BitUnion64(CR8) Bitfield<3, 0> tpr; // Task Priority Register EndBitUnion(CR8) // MTRR capabilities BitUnion64(MTRRcap) Bitfield<7, 0> vcnt; // Variable-Range Register Count Bitfield<8> fix; // Fixed-Range Registers Bitfield<10> wc; // Write-Combining EndBitUnion(MTRRcap) /** * SYSENTER configuration registers */ BitUnion64(SysenterCS) Bitfield<15, 0> targetCS; EndBitUnion(SysenterCS) BitUnion64(SysenterESP) Bitfield<31, 0> targetESP; EndBitUnion(SysenterESP) BitUnion64(SysenterEIP) Bitfield<31, 0> targetEIP; EndBitUnion(SysenterEIP) /** * Global machine check registers */ BitUnion64(McgCap) Bitfield<7, 0> count; // Number of error reporting register banks Bitfield<8> MCGCP; // MCG_CTL register present. EndBitUnion(McgCap) BitUnion64(McgStatus) Bitfield<0> ripv; // Restart-IP valid Bitfield<1> eipv; // Error-IP valid Bitfield<2> mcip; // Machine check in-progress EndBitUnion(McgStatus) BitUnion64(DebugCtlMsr) Bitfield<0> lbr; // Last-branch record Bitfield<1> btf; // Branch single step Bitfield<2> pb0; // Performance monitoring pin control 0 Bitfield<3> pb1; // Performance monitoring pin control 1 Bitfield<4> pb2; // Performance monitoring pin control 2 Bitfield<5> pb3; // Performance monitoring pin control 3 /*uint64_t pb(int index) { return bits(__data, index + 2); }*/ EndBitUnion(DebugCtlMsr) BitUnion64(MtrrPhysBase) Bitfield<7, 0> type; // Default memory type Bitfield<51, 12> physbase; // Range physical base address EndBitUnion(MtrrPhysBase) BitUnion64(MtrrPhysMask) Bitfield<11> valid; // MTRR pair enable Bitfield<51, 12> physmask; // Range physical mask EndBitUnion(MtrrPhysMask) BitUnion64(MtrrFixed) /*uint64_t type(int index) { return bits(__data, index * 8 + 7, index * 8); }*/ EndBitUnion(MtrrFixed) BitUnion64(Pat) /*uint64_t pa(int index) { return bits(__data, index * 8 + 2, index * 8); }*/ EndBitUnion(Pat) BitUnion64(MtrrDefType) Bitfield<7, 0> type; // Default type Bitfield<10> fe; // Fixed range enable Bitfield<11> e; // MTRR enable EndBitUnion(MtrrDefType) /** * Machine check */ BitUnion64(McStatus) Bitfield<15,0> mcaErrorCode; Bitfield<31,16> modelSpecificCode; Bitfield<56,32> otherInfo; Bitfield<57> pcc; // Processor-context corrupt Bitfield<58> addrv; // Error-address register valid Bitfield<59> miscv; // Miscellaneous-error register valid Bitfield<60> en; // Error condition enabled Bitfield<61> uc; // Uncorrected error Bitfield<62> over; // Status register overflow Bitfield<63> val; // Valid EndBitUnion(McStatus) BitUnion64(McCtl) /*uint64_t en(int index) { return bits(__data, index); }*/ EndBitUnion(McCtl) // Extended feature enable register BitUnion64(Efer) Bitfield<0> sce; // System call extensions Bitfield<8> lme; // Long mode enable Bitfield<10> lma; // Long mode active Bitfield<11> nxe; // No-execute enable Bitfield<12> svme; // Secure virtual machine enable Bitfield<14> ffxsr; // Fast fxsave/fxrstor EndBitUnion(Efer) BitUnion64(Star) Bitfield<31,0> targetEip; Bitfield<47,32> syscallCsAndSs; Bitfield<63,48> sysretCsAndSs; EndBitUnion(Star) BitUnion64(SfMask) Bitfield<31,0> mask; EndBitUnion(SfMask) BitUnion64(PerfEvtSel) Bitfield<7,0> eventMask; Bitfield<15,8> unitMask; Bitfield<16> usr; // User mode Bitfield<17> os; // Operating-system mode Bitfield<18> e; // Edge detect Bitfield<19> pc; // Pin control Bitfield<20> intEn; // Interrupt enable Bitfield<22> en; // Counter enable Bitfield<23> inv; // Invert mask Bitfield<31,24> counterMask; EndBitUnion(PerfEvtSel) BitUnion32(Syscfg) Bitfield<18> mfde; // MtrrFixDramEn Bitfield<19> mfdm; // MtrrFixDramModEn Bitfield<20> mvdm; // MtrrVarDramEn Bitfield<21> tom2; // MtrrTom2En EndBitUnion(Syscfg) BitUnion64(IorrBase) Bitfield<3> wr; // WrMem Enable Bitfield<4> rd; // RdMem Enable Bitfield<51,12> physbase; // Range physical base address EndBitUnion(IorrBase) BitUnion64(IorrMask) Bitfield<11> v; // I/O register pair enable (valid) Bitfield<51,12> physmask; // Range physical mask EndBitUnion(IorrMask) BitUnion64(Tom) Bitfield<51,23> physAddr; // Top of memory physical address EndBitUnion(Tom) BitUnion64(VmCrMsr) Bitfield<0> dpd; Bitfield<1> rInit; Bitfield<2> disA20M; EndBitUnion(VmCrMsr) BitUnion64(IgnneMsr) Bitfield<0> ignne; EndBitUnion(IgnneMsr) BitUnion64(SmmCtlMsr) Bitfield<0> dismiss; Bitfield<1> enter; Bitfield<2> smiCycle; Bitfield<3> exit; Bitfield<4> rsmCycle; EndBitUnion(SmmCtlMsr) /** * Segment Selector */ BitUnion64(SegSelector) // The following bitfield is not defined in the ISA, but it's useful // when checking selectors in larger data types to make sure they // aren't too large. Bitfield<63, 3> esi; // Extended selector Bitfield<15, 3> si; // Selector Index Bitfield<2> ti; // Table Indicator Bitfield<1, 0> rpl; // Requestor Privilege Level EndBitUnion(SegSelector) /** * Segment Descriptors */ BitUnion64(SegDescriptor) Bitfield<63, 56> baseHigh; Bitfield<39, 16> baseLow; Bitfield<55> g; // Granularity Bitfield<54> d; // Default Operand Size Bitfield<54> b; // Default Operand Size Bitfield<53> l; // Long Attribute Bit Bitfield<52> avl; // Available To Software Bitfield<51, 48> limitHigh; Bitfield<15, 0> limitLow; Bitfield<47> p; // Present Bitfield<46, 45> dpl; // Descriptor Privilege-Level Bitfield<44> s; // System SubBitUnion(type, 43, 40) // Specifies whether this descriptor is for code or data. Bitfield<43> codeOrData; // These bit fields are for code segments Bitfield<42> c; // Conforming Bitfield<41> r; // Readable // These bit fields are for data segments Bitfield<42> e; // Expand-Down Bitfield<41> w; // Writable // This is used for both code and data segments. Bitfield<40> a; // Accessed EndSubBitUnion(type) EndBitUnion(SegDescriptor) BitUnion64(SegAttr) Bitfield<0> writable; Bitfield<1> readable; Bitfield<2> expandDown; Bitfield<4, 3> dpl; Bitfield<5> defaultSize; Bitfield<6> longMode; EndBitUnion(SegAttr) BitUnion64(GateDescriptor) Bitfield<63, 48> offsetHigh; // Target Code-Segment Offset Bitfield<15, 0> offsetLow; // Target Code-Segment Offset Bitfield<31, 16> selector; // Target Code-Segment Selector Bitfield<47> p; // Present Bitfield<46, 45> dpl; // Descriptor Privilege-Level Bitfield<43, 40> type; Bitfield<36, 32> count; // Parameter Count EndBitUnion(GateDescriptor) /** * Descriptor-Table Registers */ BitUnion64(GDTR) EndBitUnion(GDTR) BitUnion64(IDTR) EndBitUnion(IDTR) BitUnion64(LDTR) EndBitUnion(LDTR) /** * Task Register */ BitUnion64(TR) EndBitUnion(TR) }; #endif // __ARCH_X86_INTREGS_HH__