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Hi experts,
I know for the TZC-400 each region has an attribute register which has two bits: s_wr_en and s_wr_en for controlling secure access. On the other hand, these control registers could be changed by secure access.
In this case, it looks like even one secure application / OS operation is blocked by these two bits, application / OS could also modify the bits for their requirement so I don't understand why does the TZC-400 need these two bits.
Any discussion is welcomed.
Thank you.
Simon