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STM32MP157芯片内部包含了一个Cortex-M4协处理器,也简称为CM4,可以处理对实时性有要求的任务或数据计算。


Linux Remote Processor Messaging (RPMsg) framework: 是一个virtio-based 消息总线,它可以允许一个本地处理器和远端处理器通信。

Linux remoteproc framework:remote processor(RPROC) framework允许不同的平台/架构可以控制(开启电源,加载固件,关闭电源)远端处理器,同时抽象出硬件差异。


CM4是通过三个端口内部连接(ML-AHB):

  • I-bus is used to fetch code instructions in the 0x00000000--0x1FFFFFFF address range
  • D-bus is used to read/write data in the 0x00000000--0x1FFFFFFF address range
  • S-bus is used for all accesses in the 0x20000000--0xFFFFFFFF address range; all STM32MP15 internal peripherals registers are mapped in this range.


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