• [ARMv7] question about writel & barrier
    Hi Sirs, I got a question about the way Linux 3.18 defines the "writel()". In linux-3.18/arch/arm64/include/asm/io.h, it describes: /* * I/O memory access primitives. Reads are ordered relative to any...
  • A question about the access flag fault
    Hi, everyone. The CPU will receive a access flag fault if we set the access flag = 0. My question is if we always set the access flag to be zero in the fault handler, does the CPU get the value in...
  • Hard Faults and MemManage Faults in Cortex m3/m4
    I wrote a simple program, where I am writing to an illegal memory location. Writing in an illegal Memory location generates a MemManage fault. And if MemManage is not enabled, HardFault in generated....
  • ARMv7-M: Question about syn/asynchronous exception?
    Hi all, I have little experience with bare metal programming at STM32 series and currently studying exception behavior in "ARMv-7m Architecture Reference Manual" . I'm confused about syn/asynchronous...
  • ARMv7 architecture
    Can anyone share the ARMv7 architecture document to download ? - Hari.