efi_fdt_data
fdt_start = (u_long)efi_fdt_data();
armv7_exec_kernel((register_t)marks[MARK_ENTRY], (register_t)efi_fdt_data());
const int chosen = fdt_path_offset(efi_fdt_data(), "/chosen");
data = fdt_getprop(efi_fdt_data(), chosen, "boot-hartid", NULL);
fdt_start = (register_t)efi_fdt_data();
fdt = efi_fdt_data();
void *efi_fdt_data(void);