Merge branch 'next'

doc/develop/bloblist.rst

@@ -14,6 +14,8 @@ structure defined by the code that owns it.
 For the design goals of bloblist, please see the comments at the top of the
 `bloblist.h` header file.
 
+Bloblist is an implementation with the `Firmware Handoff`_ protocol.
+
 Passing state through the boot process
 --------------------------------------
 
@@ -99,7 +101,7 @@ API documentation
 -----------------
 
 .. kernel-doc:: include/bloblist.h
-
+.. _`Firmware Handoff`: https://github.com/FirmwareHandoff/firmware_handoff
 
 Simon Glass
 sjg@chromium.org

doc/develop/devicetree/control.rst

@@ -108,6 +108,9 @@ If CONFIG_OF_BOARD is defined, a board-specific routine will provide the
 devicetree at runtime, for example if an earlier bootloader stage creates
 it and passes it to U-Boot.
 
+If CONFIG_BLOBLIST is defined, the devicetree may come from a bloblist passed
+from a previous stage, if present.
+
 If CONFIG_SANDBOX is defined, then it will be read from a file on
 startup. Use the -d flag to U-Boot to specify the file to read, -D for the
 default and -T for the test devicetree, used to run sandbox unit tests.

doc/develop/uefi/uefi.rst

@@ -642,6 +642,40 @@ UEFI variables. Booting according to these variables is possible via::
 As of U-Boot v2020.10 UEFI variables cannot be set at runtime. The U-Boot
 command 'efidebug' can be used to set the variables.
 
+UEFI HTTP Boot
+~~~~~~~~~~~~~~
+
+HTTP Boot provides the capability for system deployment and configuration
+over the network. HTTP Boot can be activated by specifying::
+
+    CONFIG_EFI_HTTP_BOOT
+
+Enabling that will automatically select::
+
+    CONFIG_CMD_DNS
+    CONFIG_CMD_WGET
+    CONFIG_BLKMAP
+
+Set up the load option specifying the target URI::
+
+    efidebug boot add -u 1 netinst http://foo/bar
+
+When this load option is selected as boot selection, resolve the
+host ip address by dns, then download the file with wget.
+If the downloaded file extension is .iso or .img file, efibootmgr tries to
+mount the image and boot with the default file(e.g. EFI/BOOT/BOOTAA64.EFI).
+If the downloaded file is PE-COFF image, load the downloaded file and
+start it.
+
+The current implementation tries to resolve the IP address as a host name.
+If the uri is like "http://192.168.1.1/foobar",
+the dns process tries to resolve the host "192.168.1.1" and it will
+end up with "host not found".
+
+We need to preset the "httpserverip" environment variable to proceed the wget::
+
+    setenv httpserverip 192.168.1.1
+
 Executing the built in hello world application
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~