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