Kernel Command Line Arguments

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nofpu 
Can be used to disable the FPU entirely. In this the kernel FPU emulation will take over floating point processing. Useful if a FPU is known to be defective, has accuracy problems and wrongly detected as present even though none exists.
rd_start 
The base address of a loaded ramdisk image. This option was added in Linux 2.6.10-rc2. See also rd_start.
rd_base 
The size of a loaded ramdisk image. This option was added in Linux 2.6.10-rc2. See also rd_start.
console 
The console settings. When using this option, you will need to specify the serial console port and baud rate. For example: console=ttyS0,38400 where ttyS0 is the serial console port and 38400 is the baud rate for the serial port. Another example: console=ttyS0,384008N1 where 8 is is data bits, N is odd parity and 1 is stop bits.
maxcpus=<number> 
Allows to limit the number of processors to be used on a multiprocessor systems.
nfsroot 
If the root filesystem for a board is mounted from a remote NFS server, this option can be used to specify the NFS server and the NFS filesystem. This option can be used as: nfsroot=<server-name>:<remote filesystem>. For example: nfsroot=10.0.0.139:/opt/mips_le_fs, where 10.0.0.139 is the NFS server name and /opt/mips_le_fs is the remove filesystem exported by the NFS server.
nosmp 
Disable SMP. Same as maxcpus=0.
root 
This option is used to specify the root filesystem. For example, if the root filesytem resides on the second partition of a SCSI device /dev/sda, then this can be specified as: root=/dev/sda2. Similarly, then the root filesystem is mounted over NFS, root=/dev/nfs can be used.