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→Authenticated Mode
===== Exit =====
===== Exit =====
The CPU automatically goes back to non-secure mode when returning back into non-secret pages. When this happens, the valid bit (bit0) in the TLB flags is cleared for all secret pages.
The CPU automatically goes back to non-secure mode when returning back into non-secret pages. When this happens, the valid bit (bit0) in the TLB flags is cleared for all secret pages.
===== Implementation =====
Under certain circumstances, it is possible to observe [[#csigauth|csigauth]] being briefly written to [[#TSEC_SCP_INSN_STAT|TSEC_SCP_INSN_STAT]] as "csigauth $c4 $c6" while the opcodes in [[#TSEC_SCP_AES_STAT|TSEC_SCP_AES_STAT]] are set to "cxsin" and "csigauth", respectively.
Via [[#TSEC_SCP_SEQ0_STAT|TSEC_SCP_SEQ0_STAT]] it can be observed that a 3-sized macro sequence is loaded into cs0 during a secure mode transition.
== Crypto processing ==
== Crypto processing ==