Difference between revisions of "Kernel Command Line Arguments"
From LinuxMIPS
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; maxcpus=<number> : Allows to limit the number of processors to be used on a multiprocessor systems. | ; 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 remote filesystem exported by the NFS server. | ; 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 remote filesystem exported by the NFS server. | ||
| − | ; 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. | + | ; 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. |
; nosmp : Disable [[SMP]]. Same as <code>maxcpus=0</code>. | ; nosmp : Disable [[SMP]]. Same as <code>maxcpus=0</code>. | ||
; nowait : Disable the use of the wait instruction for powersaving. | ; nowait : Disable the use of the wait instruction for powersaving. | ||
Latest revision as of 15:25, 26 February 2009
- 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 remote filesystem exported by the NFS server.
- 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.
- nosmp
- Disable SMP. Same as
maxcpus=0. - nowait
- Disable the use of the wait instruction for powersaving.
- rd_start
- The base address of a loaded ramdisk image. This option was added in Linux 2.6.10-rc2. See also rd_size.
- rd_size
- The size of a loaded ramdisk image. This option was added in Linux 2.6.10-rc2. See also rd_start.
- 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, when the root filesystem is mounted over NFS, root=/dev/nfs can be used.
