diff options
Diffstat (limited to 'doc/develop')
| -rw-r--r-- | doc/develop/bootstd.rst | 4 | ||||
| -rw-r--r-- | doc/develop/distro.rst | 6 |
2 files changed, 10 insertions, 0 deletions
diff --git a/doc/develop/bootstd.rst b/doc/develop/bootstd.rst index 496e24bc7a6..a07a72581e7 100644 --- a/doc/develop/bootstd.rst +++ b/doc/develop/bootstd.rst @@ -531,6 +531,10 @@ Then the iterator is set up to according to the parameters given: `BOOTFLOWIF_SINGLE_MEDIA` is set. In this case, moving to the next bootdev processes just the children of the media device. Hunters are used, in this example just the "mmc" hunter. + - If `label` indicates a particular partition in a particular media device + (e.g. "mmc1:3") then `BOOTFLOWIF_SINGLE_PARTITION` is set. In this case, + only a single partition within a bootdev is processed. Hunters are used, in + this example just the "mmc" hunter. - If `label` indicates a media uclass (e.g. "mmc") then `BOOTFLOWIF_SINGLE_UCLASS` is set. In this case, all bootdevs in that uclass are used. Hunters are used, in this example just the "mmc" hunter diff --git a/doc/develop/distro.rst b/doc/develop/distro.rst index 8016acad098..9e715b23ebb 100644 --- a/doc/develop/distro.rst +++ b/doc/develop/distro.rst @@ -81,6 +81,12 @@ as specified at `Boot Loader Specification`_: * Does not document the fdtdir option, which automatically selects the DTB to pass to the kernel. +* If no fdt/fdtdir is provided, the U-Boot will pass its own currently used + device tree. + +* If ``-`` is passed as fdt argument and ``CONFIG_SUPPORT_PASSING_ATAGS`` is + enabled, then no device tree will be used (legacy booting / pre-dtb kernel). + See also doc/README.pxe under 'pxe file format'. One example extlinux.conf generated by the Fedora installer is:: |