YTM32B1MD14 - MPU Configuration - Can I grant permission rw-|r-- for a memory section?

[nguyan2]

Hello all,

For one memory section, I want to grant read-write access for privileged mode and read-only access for unprivileged mode (rw-|r--).

However, I don’t see any permission option like this in the source code generated by the YTConfig Tool.

I also checked the ARMv8-M documentation, and it seems that this kind of permission is not directly supported.

Is there any known solution or workaround for this case?

Thanks in advance!

[Diga]

ARMv8 can't support your case.
If set AP = 0b00, only privaleged code can read/write memory, user mode can't read or write;
If set AP = 0b01, any privaleged code can read/write memory, user mode also;

[nguyan2]

Diga 在 YTM32B1MD14 - MPU Configuration - Can I grant permission rw-|r-- for a memory section? 中说：

ARMv8 can't support your case.
If set AP = 0b00, only privaleged code can read/write memory, user mode can't read or write;
If set AP = 0b01, any privaleged code can read/write memory, user mode also;

Hi, thanks for your reply. Do you have any idea about the workaround for my case?

[Diga]

ARMv7 can support your workaround. YTM32B1HA01's core is CORTEX-M7 with ARMv7.