reflect.Pointer() returned value is not the value address

type BookInfo struct {
    Meta         *TableMeta
    ...
}

func (si *schemaInfo) getTabInfo(obj interface{}) (*tabInfo, error) {
    typ := reflect.TypeOf(obj)
    val := reflect.ValueOf(obj)
    if typ.Kind() != reflect.Ptr {
        return nil, errors.New("nborm.schemaInfo.getDBInfo() error: required a pointer")
    }
    meta := *(**TableMeta)(unsafe.Pointer(val.Pointer()))
    ...
 }

getTabInfo() works well, but I want to know why val.Pointer() return a value of **TableMeta? Why not a *TableMeta?The document of reflect says,

Pointer returns v's value as a uintptr. It returns uintptr instead of unsafe.Pointer so that code using reflect cannot obtain unsafe.Pointers without importing the unsafe package explicitly. It panics if v's Kind is not Chan, Func, Map, Ptr, Slice, or UnsafePointer.

In my mind:

info := &BookInfo{}
val := reflect.ValueOf(info)
ptr := val.Pointer()
meta := (*TableMeta)(unsafe.Pointer(val.Pointer()))

should work, but infact when I called val.Pointer(), the returned value is the pointer of *TableMeta(**TableMeta).