What's the difference between ETM and Debug?

In the ARM core such as cortex-R4, it has ETM and Debug so I want ask What's the difference between ETM and Debug?
What's the difference between os_itv_wait and os_dly_wait?

Hello I'm a newer to RL-ARM and I found that there're two wait function os_itv_wait and os_dly_wait in RL-ARM. Who can tell me what's the difference between them? For example is it possible to replace...
What's the difference between LDAXR and LDREX

Hi experts: In armv8 specification, I have found two types of exclusive access instructions: LDAXR/STLXR and LDREX/STREX. I have some questions about these instructions: (1) What's the difference...
What's the difference between os_itv_wait and os_dly_wait?

Hello I'm a newer to RL-ARM and I found that there're two wait function os_itv_wait and os_dly_wait in RL-ARM. Who can tell me what's the difference between them? For example is it possible to replace...
What's the difference between LDAXR and LDREX

Hi experts: In armv8 specification, I have found two types of exclusive access instructions: LDAXR/STLXR and LDREX/STREX. I have some questions about these instructions: (1) What's the difference...