The answer is..
SCE8000#en 15
SCE8000#>debug slot 0 ppc 0 func SANB_MemShow
MemTotal: 2028668 kB
MemFree: 391256 kB
Buffers: 42524 kB
Cached: 141484 kB
SwapCached: 0 kB
Active: 1402556 kB
Inactive: 76052 kB
HighTotal: 1310720 kB
HighFree: 1860 kB
LowTotal: 717948 kB
LowFree: 389396 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 0 kB
Writeback: 0 kB
AnonPages: 1294600 kB
Mapped: 50812 kB
Slab: 147460 kB
SReclaimable: 133928 kB
SUnreclaim: 13532 kB
PageTables: 1816 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 2028668 kB
Committed_AS: 1314724 kB
VmallocTotal: 170948 kB
VmallocUsed: 87404 kB
VmallocChunk: 74176 kB
Return value is: 0 = 0x0.
SCE8000#>debug linux-shell
[root@SCE8000]#>free
total used free shared buffers cached
Mem: 2028668 1889216 139452 0 43912 187496
-/+ buffers/cache: 1657808 370860
Swap: 0 0 0
[root@SCE8000]#>free -m
See at free | -/+ buffers/cache