for_each_mem_pfn_range宏

kenrel: 5.10
arch: aarch64

启动阶段经过arm64_memblock_init之后，通过gdb可以查看到memblock布局如下，此处的memblock可以理解为在线的memory

(gdb) p/x memblock
$5 = {
   
   
  bottom_up = 0x0,
  current_limit = 0xffffffffffffffff,
  memory = {
   
   
    cnt = 0x1,
    max = 0x80,
    total_size = 0x40000000,
    regions = 0xffff8000120a8848,
    name = 0xffff80001139cc28
  },
  reserved = {
   
   
    cnt = 0x5,
    max = 0x181,
    total_size = 0x58a20c4,
    regions = 0xffff8000120a9448,
    name = 0xffff80001127e258
  }
}

其中memblock.memory如下：

(gdb) p/x *(struct memblock_region *)0xffff8000120a8848
$6 = {
   
   
  base = 0x40000000,
  size = 0x40000000,
  flags = 0x0,
  nid = 0x10
}

memblock.reserved如下：

(gdb) p/x *(struct memblock_region *)0xffff8000120a9448@5
$9 =   {