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Applies to: AXI
The use of a cache can cause of misleading information on the AxPROT signals where data with different AxPROT values (such as instruction and data) resides in the same cache line. This can also be true where a write-back cache line holds both privileged and user data. Typically when a line is evicted from such a cache it will be written with privileged access although it may contain non-privileged data.
The security information given by AxPROT will always be accurate and any cache used in a system that make use of the security features must be able to generate accurate AxPROT information.
Article last edited on: 2008-09-09 15:47:45
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