#ifndef __HIGH_CODE
#define __HIGH_CODE __attribute__((section(".highcode")))
#endif
/* Load highcode code section from flash to RAM */
2:
la a0, _highcode_lma
la a1, _highcode_vma_start
la a2, _highcode_vma_end
bgeu a1, a2, 2f
是放到内存里面运行吗
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