海思开发板中/proc/media-mem文件不存在

海思板中使用cat在终端查看mmz内存使用情况 cat /proc/media-mem出现如下情况:

Welcome to HiLinux.
~ # cat /proc/media-mem
cat: can't open '/proc/media-mem': No such file or directory
~ # 
~ # cd /proc/
/proc # 
/proc # ls
1             1235          1388          2             29            348           5             748           914           consoles      filesystems   kmsg          net           thread-self
10            1242          14            20            3             3509          515           752           917           cpu           fs            kpagecount    pagetypeinfo  timer_list
1041          1243          1475          2068          30            3529          516           753           918           cpuinfo       higmac        kpageflags    partitions    tty
1088          1245          1481          21            3034          3704          517           8             920           crypto        interrupts    loadavg       scsi          umap
1089          1247          15            2160          3220          3857          520           842           921           device-tree   iomem         locks         self          uptime
1090          13            16            2279          3268          3868          532           854           asound        devices       ioports       mci           slabinfo      version
11            1346          164           24            342           399           56            863           buddyinfo     diskstats     irq           meminfo       softirqs      vmallocinfo
1128          1353          19            25            343           4             606           884           bus           driver        kallsyms      misc          stat          vmstat
12            1383          1928          26            345           403           69            9             cgroups       execdomains   key-users     modules       sys           zoneinfo
1234          1387          1933          27            346           405           747           913           cmdline       fb            keys          mounts        sysvipc
/proc # 
/proc # ls m
mci/     meminfo  misc     modules  mounts
/proc # ls media-mem
ls: media-mem: No such file or directory
/proc #

又遇到过这样情况的吗?

查询mmz内存使用和系统内存分配结果有哪些方法? 不吝赐教