ARM EN0-001 Question Answer
A message passing system between two CPUs is implemented using data stored in a shared area of memory. To pass a message, the first CPU executes the instructions:
The second CPU receives the message using the instructions:
On both CPUs, r1 = 0x5000 and r2 = 0x6000. At which of the points A, B, C and D must Data Memory Barrier (DMB) instructions be placed in order to ensure messages are passed reliably and efficiently?
ARM EN0-001 Summary
- Vendor: ARM
- Product: EN0-001
- Update on: Jul 25, 2025
- Questions: 210
