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  • Priority Drop and Deactivation Interrupts at EL2

    Hello 

    I'm working on the Bootloader stage (EL2), I'm trying to enable Interrupts with gic v3 in that stage

    I've enabled routing IRQ, FIQ and Aborts from EL0, EL1 and EL2 to EL2  using these piece of code 

    MRS X0, HCR_EL2
    AND X0, X0, 0xFFFFFF…

  • System wide cache flush

    Hello,

    I'm working with i.MX8DX (Dual Core CortexA35 + CortexM4) with the following simplified caching system:

    My need is to flush a cached memory area to RAM in order to be viewed by the M4 core, unfortunately this area maybe cached by Core 0 and…

  • Cortex-A35 performance for DDR3 read accesses

    Hi,

     

    I am using iMX 8X which has 1 cluster of 4 Cortex-A35 cores, with DDR3L (DDR3-1866) with ECC enabled.

    I performed some measurement for MEMCPY and MEMSET functions to have an estimate of the DDR bandwidth, with one cortex-A35 core running. Here are…

  • Performance ratio between A35 and M4

    I am working on project and i used A35 to measure the performance of Application and this application will be ported on M4 , is there a fixed ratio or an equation so i can estimate the execution time of the application on CM4 ?

  • System Frequency for CortexA35

    Hello,

    For a CortexA35, when reading the system counter clock frequency CNTFRQ_EL0, I found out that the frequency is 8 MHz.

    Is this normal? For a target running in GHz?

    The target is i.MX8QXP (Quad-Core CortexA35).

  • Cortex-A35 Counter-timer Physical Count register (CNTPCT_EL0) always reads zero

    Counter-timer Physical Count register CNTPCT_EL0 always reads zero on FVP_Base_Cortex-A35x1. 

    I expect the value of this register to change over time. 

    I set $CNTFRQ_EL0=35000000, and $CNTP_CTL_EL0=5.

    What is the possible reasons, and how is there any configuration…

  • Enabling MMU in EL-2

    Hello,

    I'm developing a Baremetal application running on ARM Cortex A35 (ARMv8).

    I have succeeded to enable the Caches and MMU in EL-1.

    My questions are:

    1. Can I enable the MMU and invalidate and enable the Caches in EL-2 without enabling them…

  • What ARMv8.x revision Cortex-A35 is?

    Hi,

    ARMv8-A specification mentions revisions and options. I cannot find Cortex-A35 adheres to which exact version: ARMv8.1, 8.2, 8.3? I want to know which of the extensions described in the generic ARMv8-A spec are really available in that core.

    Thanks…

  • Introducing Cortex-A35: ARM's Most Efficient Application Processor

    The announcement of the ARM®Cortex®-A35 processor today marks the beginning of a new family of ultra high efficiency application processors from ARM. So, what are the key features of Cortex-A35 and what benefits does it provide compared to previous…

  • ARM发布全新CPU Cortex-A35:64位 超低功耗

    ARM今天宣布了一颗全新设计的CPU Cortex-A35,定位于低功耗的低端手机、可穿戴、物联网等领域。

    从这张图上就可以清晰地看到A35的位置:它也是基于ARMv8-A 64位架构的,但被放置在Cortex-A53的下边,取代对象则是32位的Cortex-A7/A5两个老核心。

    ARM宣称,A35是其有史以来能效最高的处理器,目标功耗不超过125毫瓦,而且已经在28nm工艺、1GHz频率下做到了90毫瓦,因此采用16/14nm工艺的话,可以在保持功耗不变甚至更低的前提下,轻松超过2GHz。

    它还可以和A53…