+SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2014 Red Hat Inc.
* Copyright (c) 2014-2015, NVIDIA CORPORATION. All rights reserved.
* Copyright (C) 2015 K. Merker <merker@debian.org>
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
Generic Distro Configuration Concept
Enabling the distro options
---------------------------
+In your board's defconfig, enable the DISTRO_DEFAULTS option by adding
+a line with "CONFIG_DISTRO_DEFAULTS=y". If you want to enable this
+from Kconfig itself, for e.g. all boards using a specific SoC then
+add a "imply DISTRO_DEFAULTS" to your SoC CONFIG option.
+
In your board configuration file, include the following:
------------------------------------------------------------
#ifndef CONFIG_SPL_BUILD
-#include <config_distro_defaults.h>
#include <config_distro_bootcmd.h>
#endif
------------------------------------------------------------
specific boot.scr scripts are enabled. This enables distros to generate a
U-Boot-specific boot.scr script rather than extlinux.conf as the boot
configuration file. While doing so is fully supported, and
-<config_distro_defaults.h> exposes enough parameterization to boot.scr to
+CONFIG_DISTRO_DEFAULTS exposes enough parameterization to boot.scr to
allow for board-agnostic boot.scr content, this document recommends that
distros generate extlinux.conf rather than boot.scr. extlinux.conf is intended
to work across multiple bootloaders, whereas boot.scr will only work with
device or SD card) or type of boot device (e.g. USB disk). The parameters to
the func macro (passed in by the internal implementation of the header) are:
-- Upper-case disk type (MMC, SATA, SCSI, IDE, USB, DHCP, PXE).
+- Upper-case disk type (MMC, SATA, SCSI, IDE, USB, DHCP, PXE, VIRTIO).
- Lower-case disk type (same options as above).
- ID of the specific disk (MMC only) or ignored for other types.
* scsi
* ide
* usb
+ * virtio
Other *boot* variables than the ones defined above are only for internal use
of the boot environment and are not guaranteed to exist or work in the same