TWR-MPC5125 Freescale Semiconductor, TWR-MPC5125 Datasheet - Page 17

• Manufacturer Part Number: TWR-MPC5125
• Description: TOWER SYSTEM BOARD MPC5125
• Manufacturer: Freescale Semiconductor
• Type: MCUr

Specifications of TWR-MPC5125

• Contents: Board
• Processor To Be Evaluated: MPC5125
• Data Bus Width: 32 bit
• Interface Type: Ethernet, USB, HDMI
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Silicon Manufacturer: Freescale
• Core Architecture: Power Architecture
• Core Sub-architecture: Power Architecture
• Silicon Core Number: MPC5xxx
• Silicon Family Name: MobileGT
• Rohs Compliant: Yes
• For Use With/related Products: Freescale Tower System
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

6.3 Configuring U-Boot
To boot the Linux kernel u-boot must have device tree support compiled in. To
verify this support is enabled, type help bootm at the u-boot prompt.
If the help message indicates that bootm takes three arguments then device
tree support is enabled. If not then it will be necessary to install a new u-boot.
See the Flashing U-Boot chapter below for details.
The factory installed u-boot has several commands predefined in the default
environment.
1). Print the existing u-boot configuration by typing “print” at the u-boot
prompt.
TWR-MPC 5125
=> print
bootcmd=run nfsboot
bootdelay=5
baudrate=115200
loads_echo=1
preboot=echo;echo Type \"run flash_nfs\" to mount root filesystem over
NFS;echo
loadaddr=400000
u-boot_addr_r=200000
u-boot_addr=FFF00000
kernel_addr=FC040000
=> help bootm
bootm [addr [arg ...]]
- boot application image stored in memory
passing arguments 'arg ...'; when booting a Linux kernel, 'arg' can be the
address of an initrd image
When booting a Linux kernel which requires a flat device-tree
a third argument is required which is the address of the of the device-tree blob.
To boot that kernel without an initrd image, use a '-' for the second argument. If
you do not pass a third a bd_info struct will be passed instead
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