powerpc/405ex: Support cuImage for PPC405EX

[Tiejun Chen]

Summary: powerpc/405ex: Support cuImage for PPC405EX
Reviewers: Benjmain and linux-ppc
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These patch series are used to support cuImage on the kilauea board based on PPC405ex.

Tested on the amcc kilauea board:
===
...
=> tftp 1000000 cuImage.kilauea
Waiting for PHY auto negotiation to complete.. done
ENET Speed is 100 Mbps - FULL duplex connection (EMAC0)
Using ppc_4xx_eth0 device
TFTP from server 192.168.1.2; our IP address is 192.168.1.103
Filename 'cuImage.kilauea'.
Load address: 0x1000000
Loading: #################################################################
         #################################################################
         #################################################################
         #################################################################
         #########################################
done
Bytes transferred = 1540945 (178351 hex)
=> bootm
## Booting kernel from Legacy Image at 01000000 ...
   Image Name:   Linux-2.6.31-rc5-57857-g8df7f47-
   Created:      2009-08-17   6:31:13 UTC
   Image Type:   PowerPC Linux Kernel Image (gzip compressed)
   Data Size:    1540881 Bytes =  1.5 MB
   Load Address: 00400000
   Entry Point:  00400468
   Verifying Checksum ... OK
   Uncompressing Kernel Image ... OK
CPU clock-frequency <- 0x23c345fa (600MHz)
CPU timebase-frequency <- 0x23c345fa (600MHz)
/plb: clock-frequency <- bebc1fe (200MHz)
/plb/opb: clock-frequency <- 5f5e0ff (100MHz)
/plb/opb/ebc: clock-frequency <- 5f5e0ff (100MHz)
/plb/opb/serial at ef600200: clock-frequency <- a8c000 (11MHz)
/plb/opb/serial at ef600300: clock-frequency <- a8c000 (11MHz)
Memory <- <0x0 0x10000000> (256MB)
ethernet0: local-mac-address <- 00:06:4b:10:22:6c
ethernet1: local-mac-address <- 00:06:4b:10:22:6d

zImage starting: loaded at 0x00400000 (sp: 0x0fe9ec08)
Allocating 0x330c70 bytes for kernel ...
gunzipping (0x00000000 <- 0x0040f000:0x0073a03c)...done 0x31425c bytes

Linux/PowerPC load: root=/dev/nfs rw nfsroot=192.168.1.2:/home/vividfe/rootfsf
Finalizing device tree... flat tree at 0x747300
Using PowerPC 40x Platform machine description
...

Best Regards
Tiejun