AMD 3200 Revision History - Page 88
Processor, Restore, Registers
UPC - 730143241144
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Revision Guide for AMD Family 15h Models 00h-0Fh Processors 48063 Rev. 3.18 October 2012 744 Processor CC6 May Not Restore Trap Registers Description Following a core C6 (CC6) power state transition, the processor core may not restore the following registers: • MSRC001_0053, IO Trap Register 3 • MSRC001_0052, IO Trap Register 2 • MSRC001_0051, IO Trap Register 1 • MSRC001_0050, IO Trap Register 0 Instead, the registers are set to zero when the processor resumes from CC6 state. This erratum only applies on processor models that have a single core per compute-unit (Compute Unit Status Register[DualCore], D18F5x80[16] is 0b). Potential Effect on System The processor may not observe debug traps after the processor has entered and exited CC6 mode. Suggested Workaround BIOS should not use these trap registers. Fix Planned No fix planned 88 Product Errata