Intel I3-530 Specifications - Page 29
An Uncorrectable Error Logged in IA32_CR_MC2_STATUS May Also
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AAU39. DR6 May Contain Incorrect Information When the First Instruction After a MOV SS,r/m or POP SS is a Store Problem: Normally, each instruction clears the changes in DR6 (Debug Status Register) caused by the previous instruction. However, the instruction following a MOV SS,r/m (MOV to the stack segment selector) or POP SS (POP stack segment selector) instruction will not clear the changes in DR6 because data breakpoints are not taken immediately after a MOV SS,r/m or POP SS instruction. Due to this erratum, any DR6 changes caused by a MOV SS,r/m or POP SS instruction may be cleared if the following instruction is a store. Implication: When this erratum occurs, incorrect information may exist in DR6. This erratum will not be observed under normal usage of the MOV SS,r/m or POP SS instructions (i.e., following them with an instruction that writes [e/r]SP). When debugging or when developing debuggers, this behavior should be noted. Workaround: None identified. Status: For the steppings affected, see the Summary Tables of Changes. AAU40. An Uncorrectable Error Logged in IA32_CR_MC2_STATUS May Also Result in a System Hang Problem: Uncorrectable errors logged in IA32_CR_MC2_STATUS MSR (409H) may also result in a system hang causing an Internal Timer Error (MCACOD = 0x0400h) to be logged in another machine check bank (IA32_MCi_STATUS). Implication: Uncorrectable errors logged in IA32_CR_MC2_STATUS can further cause a system hang and an Internal Timer Error to be logged. Workaround: None identified. Status: For the steppings affected, see the Summary Tables of Changes. AAU41. IA32_PERF_GLOBAL_CTRL MSR May Be Incorrectly Initialized Problem: The IA32_PERF_GLOBAL_CTRL MSR (38FH) bits [34:32] may be incorrectly set to 7H after reset; the correct value should be 0H. Implication: The IA32_PERF_GLOBAL_CTRL MSR bits [34:32] may be incorrect after reset (EN_FIXED_CTR{0, 1, 2} may be enabled). Workaround: None identified. Status: For the steppings affected, see the Summary Tables of Changes. AAU42. Performance Monitor Counter INST_RETIRED.STORES May Count Higher than Expected Problem: Performance Monitoring counter INST_RETIRED.STORES (Event: C0H) is used to track retired instructions which contain a store operation. Due to this erratum, the processor may also count other types of instructions including WRMSR and MFENCE. Implication: Performance Monitoring counter INST_RETIRED.STORES may report counts higher than expected. Workaround: None identified. Status: For the steppings affected, see the Summary Tables of Changes. 29 Specification Update