在各平台初始化过程中调用early_init_fdt_scan_reserved_mem()进行保留内存的初始化。 setup_arch_memory in init.c(arch\arc\mm) : early_init_fdt_scan_reserved_mem(); arm64_memblock_init in init.c(arch\arm64\mm) : early_init_fdt_scan_reserved_mem(); ...