colibri_imx6: fix video stdout in default environment

[oweals/u-boot.git] / doc / README.distro

diff --git a/doc/README.distro b/doc/README.distro
index 2af559009bb58c4a9848587c79cafeedcb453e23..5076bebd1808672073067e048912f7407b498f8d 100644 (file)
--- a/doc/README.distro
+++ b/doc/README.distro
@@ -1,9 +1,8 @@
+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
@@ -165,8 +164,7 @@ 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 "default y if ARCH_FOO" to the DISTRO_DEFAULTS section of
-the Kconfig file in the root of the u-boot sources.
+add a "imply DISTRO_DEFAULTS" to your SoC CONFIG option.
 
 In your board configuration file, include the following:
 
@@ -248,6 +246,18 @@ kernel_addr_r:
 
   A size of 16MB for the kernel is likely adequate.
 
+kernel_comp_addr_r:
+  Optional. This is only required if user wants to boot Linux from a compressed
+  Image(.gz, .bz2, .lzma, .lzo) using booti command. It represents the location
+  in RAM where the compressed Image will be decompressed temporarily. Once the
+  decompression is complete, decompressed data will be moved kernel_addr_r for
+  booting.
+
+kernel_comp_size:
+  Optional. This is only required if user wants to boot Linux from a compressed
+  Image using booti command. It represents the size of the compressed file. The
+  size has to at least the size of loaded image for decompression to succeed.
+
 pxefile_addr_r:
 
   Mandatory. The location in RAM where extlinux.conf will be loaded to prior
@@ -294,7 +304,7 @@ Each entry in the macro defines a single boot device (e.g. a specific eMMC
 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.
 
@@ -400,6 +410,7 @@ The list of possible targets consists of:
   * 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