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58 #ifndef __ARCH_X86_MISCREGS_HH__
59 #define __ARCH_X86_MISCREGS_HH__
61 #include "base/bitunion.hh"
79 // Most of these are invalid.
81 MISCREG_CR0 = MISCREG_CR_BASE,
100 MISCREG_DR0 = MISCREG_DR_BASE,
113 MISCREG_SEG_SEL_BASE,
114 MISCREG_ES = MISCREG_SEG_SEL_BASE,
121 // Hidden segment base field
122 MISCREG_SEG_BASE_BASE,
123 MISCREG_ES_BASE = MISCREG_SEG_BASE_BASE,
130 // Hidden segment limit field
131 MISCREG_SEG_LIMIT_BASE,
132 MISCREG_ES_LIMIT = MISCREG_SEG_LIMIT_BASE,
139 // Hidden segment limit attributes
140 MISCREG_SEG_ATTR_BASE,
141 MISCREG_ES_ATTR = MISCREG_SEG_ATTR_BASE,
148 // System segment selectors
149 MISCREG_SYSSEG_SEL_BASE,
150 MISCREG_LDTR = MISCREG_SYSSEG_SEL_BASE,
153 // Hidden system segment base field
154 MISCREG_SYSSEG_BASE_BASE,
155 MISCREG_LDTR_BASE = MISCREG_SYSSEG_BASE_BASE,
160 // Hidden system segment limit field
161 MISCREG_SYSSEG_LIMIT_BASE,
162 MISCREG_LDTR_LIMIT = MISCREG_SYSSEG_LIMIT_BASE,
167 // Hidden system segment attribute field
168 MISCREG_SYSSEG_ATTR_BASE,
169 MISCREG_LDTR_ATTR = MISCREG_SYSSEG_ATTR_BASE,
172 //XXX Add "Model-Specific Registers"
178 * A type to describe the condition code bits of the RFLAGS register,
179 * plus two flags, EZF and ECF, which are only visible to microcode.
181 BitUnion64(CCFlagBits)
190 EndBitUnion(CCFlagBits)
196 Bitfield<21> ID; // ID Flag
197 Bitfield<20> VIP; // Virtual Interrupt Pending
198 Bitfield<19> VIF; // Virtual Interrupt Flag
199 Bitfield<18> AC; // Alignment Check
200 Bitfield<17> VM; // Virtual-8086 Mode
201 Bitfield<16> RF; // Resume Flag
202 Bitfield<14> NT; // Nested Task
203 Bitfield<13, 12> IOPL; // I/O Privilege Level
204 Bitfield<11> OF; // Overflow Flag
205 Bitfield<10> DF; // Direction Flag
206 Bitfield<9> IF; // Interrupt Flag
207 Bitfield<8> TF; // Trap Flag
208 Bitfield<7> SF; // Sign Flag
209 Bitfield<6> ZF; // Zero Flag
210 Bitfield<4> AF; // Auxiliary Flag
211 Bitfield<2> PF; // Parity Flag
212 Bitfield<0> CF; // Carry Flag
219 Bitfield<31> PG; // Paging
220 Bitfield<30> CD; // Cache Disable
221 Bitfield<29> NW; // Not Writethrough
222 Bitfield<18> AM; // Alignment Mask
223 Bitfield<16> WP; // Write Protect
224 Bitfield<5> NE; // Numeric Error
225 Bitfield<4> ET; // Extension Type
226 Bitfield<3> TS; // Task Switched
227 Bitfield<2> EM; // Emulation
228 Bitfield<1> MP; // Monitor Coprocessor
229 Bitfield<0> PE; // Protection Enabled
232 // Page Fault Virtual Address
234 Bitfield<31, 0> legacy;
238 Bitfield<51, 12> longPDTB; // Long Mode Page-Directory-Table
240 Bitfield<31, 12> PDTB; // Non-PAE Addressing Page-Directory-Table
242 Bitfield<31, 5> PAEPDTB; // PAE Addressing Page-Directory-Table
244 Bitfield<4> PCD; // Page-Level Cache Disable
245 Bitfield<3> PWT; // Page-Level Writethrough
249 Bitfield<10> OSXMMEXCPT; // Operating System Unmasked
251 Bitfield<9> OSFXSR; // Operating System FXSave/FSRSTOR Support
252 Bitfield<8> PCE; // Performance-Monitoring Counter Enable
253 Bitfield<7> PGE; // Page-Global Enable
254 Bitfield<6> MCE; // Machine Check Enable
255 Bitfield<5> PAE; // Physical-Address Extension
256 Bitfield<4> PSE; // Page Size Extensions
257 Bitfield<3> DE; // Debugging Extensions
258 Bitfield<2> TSD; // Time Stamp Disable
259 Bitfield<1> PVI; // Protected-Mode Virtual Interrupts
260 Bitfield<0> VME; // Virtual-8086 Mode Extensions
264 Bitfield<3, 0> TPR; // Task Priority Register
270 BitUnion64(SegSelector)
271 Bitfield<15, 3> SI; // Selector Index
272 Bitfield<2> TI; // Table Indicator
273 Bitfield<1, 0> RPL; // Requestor Privilege Level
274 EndBitUnion(SegSelector)
277 * Segment Descriptors
280 BitUnion64(SegDescriptor)
281 Bitfield<63, 56> baseHigh;
282 Bitfield<39, 16> baseLow;
283 Bitfield<55> G; // Granularity
284 Bitfield<54> D; // Default Operand Size
285 Bitfield<54> B; // Default Operand Size
286 Bitfield<53> L; // Long Attribute Bit
287 Bitfield<52> AVL; // Available To Software
288 Bitfield<51, 48> limitHigh;
289 Bitfield<15, 0> limitLow;
290 Bitfield<47> P; // Present
291 Bitfield<46, 45> DPL; // Descriptor Privilege-Level
292 Bitfield<44> S; // System
293 SubBitUnion(type, 43, 40)
294 // Specifies whether this descriptor is for code or data.
295 Bitfield<43> codeOrData;
297 // These bit fields are for code segments
298 Bitfield<42> C; // Conforming
299 Bitfield<41> R; // Readable
301 // These bit fields are for data segments
302 Bitfield<42> E; // Expand-Down
303 Bitfield<41> W; // Writable
305 // This is used for both code and data segments.
306 Bitfield<40> A; // Accessed
308 EndBitUnion(SegDescriptor)
310 BitUnion64(GateDescriptor)
311 Bitfield<63, 48> offsetHigh; // Target Code-Segment Offset
312 Bitfield<15, 0> offsetLow; // Target Code-Segment Offset
313 Bitfield<31, 16> selector; // Target Code-Segment Selector
314 Bitfield<47> P; // Present
315 Bitfield<46, 45> DPL; // Descriptor Privilege-Level
316 Bitfield<43, 40> type;
317 Bitfield<36, 32> count; // Parameter Count
318 EndBitUnion(GateDescriptor)
321 * Descriptor-Table Registers
339 #endif // __ARCH_X86_INTREGS_HH__