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  • Why does FPU performance differ in AArch64 and AArch32 with Cortex-A53?

    Hello experts,


    I have come to having a question.
    VFP Benchmark is a benchmark application which was made by a certain Japanese in order to measure ARM VFP performance especially for ARMv7-A and ARMv8-A.
    The software can be downloaded from the following link…

  • indicator for A core system timer implemented or not

    Hi ARM expert,

        In ARM V7 RM, I saw "This chapter describes the implementation of the ARM Generic Timer as an OPTIONAL extension to an ARMv7-A or ARMv7-R processor implementation.". So, I think it means that a SoC implementation…

  • aarch64 kernel using aarch32 page tables

    Hi !

    I'm trying to update my custom kernel, working with short or long descriptor in armv7a to a target supporting armv8.

    My current setup uses TTBR0 to point to the PL0 page table and TTBR1 to point to the PL1 page table.

    At the moment, I sometimes…

  • 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 the memory? For example, the instruction "ldr rd, address…