參數(shù)資料
型號: BX805565130P
廠商: INTEL CORP
元件分類: 微控制器/微處理器
英文描述: 64-BIT, MICROPROCESSOR, BGA771
封裝: LGA-771
文件頁數(shù): 7/40頁
文件大?。?/td> 200K
代理商: BX805565130P
Dual-Core Intel Xeon Processor 5100 Series Specification Update
15
Errata
AG1.
Writing the Local Vector Table (LVT) when an Interrupt is Pending
May Cause an Unexpected Interrupt
Problem:
If a local interrupt is pending when the LVT entry is written, an interrupt may be taken
on the new interrupt vector even if the mask bit is set.
Implication: An interrupt may immediately be generated with the new vector when a LVT entry is
written, even if the new LVT entry has the mask bit set.
If there is no Interrupt
Service Routine (ISR) set up for that vector the system will GP fault. If the ISR does
not do an End of Interrupt (EOI) the bit for the vector will be left set in the in-service
register and mask all interrupts at the same or lower priority.
Workaround: Any vector programmed into an LVT entry must have an ISR associated with it, even if
that vector was programmed as masked. This ISR routine must do an EOI to clear any
unexpected interrupts that may occur. The ISR associated with the spurious vector
does not generate an EOI, therefore the spurious vector should not be used when
writing the LVT.
Status:
For the steppings affected, see the Summary Tables of Changes.
AG2.
LOCK# Asserted During a Special Cycle Shutdown Transaction May
Unexpectedly De-assert
Problem:
During a processor shutdown transaction, when LOCK# is asserted and if a DEFER# is
received during a snoop phase and the Locked transaction is pipelined on the front side
bus (FSB), LOCK# may unexpectedly de-assert.
Implication: When this erratum occurs, the system may hang during shutdown. Intel has not
observed this erratum with any commercially available systems or software.
Workaround: None identified.
Status:
For the steppings affected, see the Summary Tables of Changes.
AG3.
Address Reported by Machine-Check Architecture (MCA) on Single-bit
L2 ECC Errors May be Incorrect
Problem:
When correctable Single-bit ECC errors occur in the L2 cache, the address is logged in
the MCA address register (MCi_ADDR). Under some scenarios, the address reported
may be incorrect.
Implication: Software should not rely on the value reported in MCi_ADDR, for Single-bit L2 ECC
errors.
Workaround: None identified.
Status:
For the steppings affected, see the Summary Tables of Changes.
AG4.
VERW/VERR/LSL/LAR Instructions May Unexpectedly Update the Last
Exception Record (LER) MSR
Problem:
The LER MSR may be unexpectedly updated, if the resultant value of the Zero Flag (ZF)
is zero after executing the following instructions
1) VERR (ZF=0 indicates unsuccessful segment read verification)
2) VERW (ZF=0 indicates unsuccessful segment write verification)
3) LAR (ZF=0 indicates unsuccessful access rights load)
4) LSL (ZF=0 indicates unsuccessful segment limit load)
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