有没有前辈用过ARM双核？CPU0怎么唤醒CPU1？看了zynq的手册，描述如下：
The steps for CPU 0 to start an application on CPU 1 are as follows:
1. Write the address of the application for CPU 1 to 0xFFFFFFF0.
2. Execute the SEV instruction to cause CPU 1 to wake up and jump to the application.
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