Справочник Пользователя для Intel 253668-032US
9-4 Vol. 3
PROCESSOR MANAGEMENT AND INITIALIZATION
LDTR, Task
Register
Selector = 0000H
Base = 00000000H
Limit = FFFFH
AR = Present, R/W
Selector = 0000H
Base = 00000000H
Limit = FFFFH
AR = Present, R/W
Selector = 0000H
Base = 00000000H
Limit = FFFFH
AR = Present, R/W
DR0, DR1, DR2,
DR3
00000000H
00000000H
00000000H
DR6
FFFF0FF0H
FFFF0FF0H
FFFF0FF0H
DR7
00000400H
00000400H
00000400H
Time-Stamp
Counter
Power up or Reset: 0H
INIT: Unchanged
Power up or Reset: 0H
INIT: Unchanged
Power up or Reset: 0H
INIT: Unchanged
Perf. Counters and
Event Select
Power up or Reset: 0H
INIT: Unchanged
Power up or Reset: 0H
INIT: Unchanged
Power up or Reset: 0H
INIT: Unchanged
All Other MSRs
Pwr up or Reset:
Undefined
INIT: Unchanged
Pwr up or Reset:
Undefined
INIT: Unchanged
Pwr up or Reset:
Undefined
INIT: Unchanged
Data and Code
Cache, TLBs
Invalid
Invalid
Invalid
Fixed MTRRs
Pwr up or Reset: Disabled
INIT: Unchanged
Pwr up or Reset: Disabled
INIT: Unchanged
Not Implemented
Variable MTRRs
Pwr up or Reset: Disabled
INIT: Unchanged
Pwr up or Reset: Disabled
INIT: Unchanged
Not Implemented
Machine-Check
Architecture
Pwr up or Reset:
Undefined
INIT: Unchanged
Pwr up or Reset:
Undefined
INIT: Unchanged
Not Implemented
APIC
Pwr up or Reset: Enabled
INIT: Unchanged
Pwr up or Reset: Enabled
INIT: Unchanged
Pwr up or Reset: Enabled
INIT: Unchanged
NOTES:
1. The 10 most-significant bits of the EFLAGS register are undefined following a reset. Software
should not depend on the states of any of these bits.
2. The CD and NW flags are unchanged, bit 4 is set to 1, all other bits are cleared.
3. Where “n” is the Extended Model Value for the respective processor.
4. If Built-In Self-Test (BIST) is invoked on power up or reset, EAX is 0 only if all tests passed. (BIST
3. Where “n” is the Extended Model Value for the respective processor.
4. If Built-In Self-Test (BIST) is invoked on power up or reset, EAX is 0 only if all tests passed. (BIST
cannot be invoked during an INIT.)
5. The state of the x87 FPU and MMX registers is not changed by the execution of an INIT.
Table 9-1. IA-32 Processor States Following Power-up, Reset, or INIT (Contd.)
Register
Pentium 4 and Intel
Xeon Processor
P6 Family Processor
Pentium Processor