sample_embedding_folder2/0737534.txt

Ticket Name: TDA2: Cortex-A15 cores secure state after exiting from ROM Code

Query Text:
Part Number: TDA2 Hi, I have noticed that ROM Code provides some Secure Monitor Call interfaces to user. Why so? Is it because A15 cores enter non-secure state after exiting from ROM code?

Responses:
Hi Yang, I think they are the only way to accomplish the respective functions on a non-secure, aka general-purpose (GP) device (SoC). I guess they are not needed on HS devices. I'm not an expert, just can recall some older threads in the forum. The TRM also states the following: The ROM code provides different services that can be called on GP devices for L1 and L2-cache maintenance, Enter in Low Power, etc. ... The following code example shows how the monitor ROM code functions can be accessed by an application running in public mode: .... Regards, Stan