U-Boot - Revision history

Dejvino at 20:47, 28 March 2020

2020-03-28T20:47:06Z

2020-03-28T20:45:22Z

2020-03-28T20:37:40Z

2020-03-28T20:19:59Z

2020-03-28T19:58:53Z

2020-03-28T19:51:36Z

2020-03-28T19:44:59Z

2020-03-28T18:46:16Z

2020-03-28T18:23:22Z

2020-03-28T18:22:37Z

@@ Line 49: / Line 49: @@
 ===== Examples =====
 {{code|/boot/extlinux/extlinux.conf}}
-<pre>
+<pre class="wm-collapsible wm-collapsed">
 ui menu.c32
@@ Line 68: / Line 68: @@
 {{code|boot.cmd}}
-<pre>
+<pre class="wm-collapsible wm-collapsed">
 setenv bootargs console=ttymxc0,115200 quiet video=mxcfb0:dev=hdmi,640x480@60,if=RGB24 video=mxcfb1:dev=lcd,640x480@60,if=RGB666 rootfstype=squashfs root=/dev/ram autoinstall ${teziargs}
@@ Line 80: / Line 80: @@
 bootm ${ramdisk_addr_r}
 </pre>
 == Related ==

@@ Line 44: / Line 44: @@
 After U-Boot has found a {{code|boot.scr}} (in absence of an {{code|extlinux.conf}}), it will simply execute its contents in the U-Boot shell. This means that you can (and should only) use any U-Boot command to customize your boot process. This is specially convenient if you want to circumvent the limitations of the {{code|extlinux.conf}} approach.
 ===== Examples =====
@@ Line 63: / Line 65: @@
      fdtdir /dtbs
      initrd /initramfs-linux.img
 </pre>

@@ Line 40: / Line 40: @@
 For each of these devices, U-Boot will search in the first partition marked with a bootable flag (via the MBR bootable flag, or GPT legacy_bios_bootable attribute). In its absence, it will fall back to looking at the first valid partition. Disto Boot recognizes FAT and ext2/3/4 filesystems.
 U-Boot searches for {{code|/extlinux/extlinux.conf}} then {{code|/boot/extlinux/extlinux.conf}} on disk, or {{code|pxelinux.cfg/default}} over the network. The content is as recognized by [[syslinux]] (extlinux). It also supports its own {{code|bootcmd}} format in {{code|boot.scr}} file.
 == Related ==
@@ Line 53: / Line 76: @@
 * Presentation on TPL: SPL loading SPL (and what is SPL?) [http://www.denx.de/wiki/pub/U-Boot/MiniSummitELCE2013/tpl-presentation.pdf]
 * Distro boot Linux: [https://developer.toradex.com/knowledge-base/distro-boot-linux]
-* Syslinux/Extlinus [https://wiki.syslinux.org/wiki/index.php?title=SYSLINUX]
+* Syslinux/Extlinux [https://wiki.syslinux.org/wiki/index.php?title=SYSLINUX]

@@ Line 21: / Line 21: @@
 # SPL does more extended initialization, loads and executes U-Boot
 # U-Boot finishes initialization, provides a command prompt / searches for OS images / boots them
 === Distro Boot ===
@@ Line 52: / Line 53: @@
 * Presentation on TPL: SPL loading SPL (and what is SPL?) [http://www.denx.de/wiki/pub/U-Boot/MiniSummitELCE2013/tpl-presentation.pdf]
 * Distro boot Linux: [https://developer.toradex.com/knowledge-base/distro-boot-linux]

@@ Line 23: / Line 23: @@
 === Distro Boot ===
-Source: [https://gitlab.denx.de/u-boot/u-boot/-/blob/master/doc/README.distro README.distro]
+Source: [https://gitlab.denx.de/u-boot/u-boot/-/blob/master/doc/README.distro README.distro] [https://developer.toradex.com/knowledge-base/distro-boot-linux]
 Standardized way of booting a [[Linux distribution]] from U-Boot, without needing to build the distribution specifically for the target device. A distribution needs to provide its own generic bootloader, e.g. [[syslinux]] (extlinux).
 Enabled by: <code>CONFIG_DISTRO_DEFAULTS=y</code>
 U-Boot searches for {{code|/extlinux/extlinux.conf}} then {{code|/boot/extlinux/extlinux.conf}} on disk, or {{code|pxelinux.cfg/default}} over the network. The content is as recognized by [[syslinux]] (extlinux). It also supports its own {{code|bootcmd}} format in {{code|boot.scr}} file.
 == Related ==

@@ Line 45: / Line 45: @@
 * Get More out of U-Boot (introduction, partitioning, etc.) [https://github.com/umiddelb/armhf/wiki/Get-more-out-of-%22Das-U-Boot%22]
 * Presentation on TPL: SPL loading SPL (and what is SPL?) [http://www.denx.de/wiki/pub/U-Boot/MiniSummitELCE2013/tpl-presentation.pdf]
-* Distro boot Linux: [[https://developer.toradex.com/knowledge-base/distro-boot-linux]]
+* Distro boot Linux: [https://developer.toradex.com/knowledge-base/distro-boot-linux]

@@ Line 12: / Line 12: @@
 * ITB {{Todo|???}}
 * FIT (Flat Image Tree) {{Todo|Enhance}}
 == Related ==

@@ Line 19: / Line 19: @@
 == External ==
 * Repository: [https://gitlab.denx.de/u-boot/u-boot/]
 * Presentation of U-Boot and porting to devices [https://bootlin.com/pub/conferences/2015/captronic/captronic-porting-linux-on-arm.pdf]
 * Get More out of U-Boot (introduction, partitioning, etc.) [https://github.com/umiddelb/armhf/wiki/Get-more-out-of-%22Das-U-Boot%22]
 * Presentation on TPL: SPL loading SPL (and what is SPL?) [http://www.denx.de/wiki/pub/U-Boot/MiniSummitELCE2013/tpl-presentation.pdf]
 * Distro boot Linux: [[https://developer.toradex.com/knowledge-base/distro-boot-linux]]