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79f663515a
We use the terms 'distro' to mean extlinux but they are not really the same. 'Distro' could refer to any method of booting a distribution, whereas extlinux is a particular method. Also we sometimes use syslinux, but it is better to use the same term in all cases. Rename distro to syslinux and also update bootstd uses of syslinux to use extlinux instead. Signed-off-by: Simon Glass <sjg@chromium.org>
112 lines
3.6 KiB
ReStructuredText
112 lines
3.6 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0+:
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bootmeth command
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================
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Synopis
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-------
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::
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bootmeth list [-a] - list selected bootmeths (-a for all)
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bootmeth order "[<bm> ...]" - select the order of bootmeths\n"
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Description
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-----------
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The `bootmeth` command is used to manage bootmeths. It can list them and change
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the order in which they are used.
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See :doc:`../../develop/bootstd` for more information.
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.. _bootmeth_order:
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bootmeth order
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~~~~~~~~~~~~~~
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Selects which bootmeths to use and the order in which they are invoked. When
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scanning bootdevs, each bootmeth is tried in turn to see if it can find a valid
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bootflow. You can use this command to adjust the order or even to omit some
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boomeths.
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The argument is a quoted list of bootmeths to use, by name. If global bootmeths
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are included, they must be at the end, otherwise the scanning mechanism will not
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work correctly.
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bootmeth list
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~~~~~~~~~~~~~
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This lists the selected bootmeths, or all of them, if the `-a` flag is used.
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The format looks like this:
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===== === ================== =================================
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Order Seq Name Description
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===== === ================== =================================
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0 0 extlinunx Extlinux boot from a block device
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1 1 efi EFI boot from an .efi file
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2 2 pxe PXE boot from a network device
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3 3 sandbox Sandbox boot for testing
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glob 4 efi_mgr EFI bootmgr flow
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===== === ================== =================================
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The fields are as follows:
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Order:
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The order in which these bootmeths are invoked for each bootdev. If this
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shows as a hyphen, then the bootmeth is not in the current ordering. If it
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shows as 'glob', then this is a global bootmeth and should be at the end.
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Seq:
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The sequence number of the bootmeth, i.e. the normal ordering if none is set
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Name:
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Name of the bootmeth
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Description:
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A friendly description for the bootmeth
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Example
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-------
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This shows listing bootmeths. All are present and in the normal order::
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=> bootmeth list
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Order Seq Name Description
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----- --- ------------------ ------------------
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0 0 distro Extlinux boot from a block device
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1 1 efi EFI boot from an .efi file
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2 2 pxe PXE boot from a network device
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3 3 sandbox Sandbox boot for testing
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4 4 efi_mgr EFI bootmgr flow
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----- --- ------------------ ------------------
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(5 bootmeths)
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Now the order is changed, to include only two of them::
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=> bootmeth order "sandbox distro"
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=> bootmeth list
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Order Seq Name Description
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----- --- ------------------ ------------------
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0 3 sandbox Sandbox boot for testing
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1 0 distro Extlinux boot from a block device
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----- --- ------------------ ------------------
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(2 bootmeths)
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The -a flag shows all bootmeths so you can clearly see which ones are used and
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which are not::
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=> bootmeth list -a
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Order Seq Name Description
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----- --- ------------------ ------------------
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1 0 distro Extlinux boot from a block device
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- 1 efi EFI boot from an .efi file
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- 2 pxe PXE boot from a network device
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0 3 sandbox Sandbox boot for testing
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- 4 efi_mgr EFI bootmgr flow
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----- --- ------------------ ------------------
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(5 bootmeths)
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