summaryrefslogtreecommitdiff
path: root/doc
diff options
context:
space:
mode:
Diffstat (limited to 'doc')
-rw-r--r--doc/board/emulation/acpi.rst23
-rw-r--r--doc/board/emulation/index.rst1
-rw-r--r--doc/develop/devicetree/control.rst3
3 files changed, 27 insertions, 0 deletions
diff --git a/doc/board/emulation/acpi.rst b/doc/board/emulation/acpi.rst
new file mode 100644
index 00000000000..17b68e1b780
--- /dev/null
+++ b/doc/board/emulation/acpi.rst
@@ -0,0 +1,23 @@
+.. SPDX-License-Identifier: GPL-2.0+
+
+ACPI on QEMU
+============
+
+QEMU can provide ACPI tables on ARM, RISC-V (since QEMU v8.0.0), and x86.
+
+The following U-Boot settings are needed for ACPI support::
+
+ CONFIG_CMD_QFW=y
+ CONFIG_ACPI=y
+ CONFIG_GENERATE_ACPI_TABLE=y
+
+On x86 these settings are already included in the defconfig files. ARM and
+RISC-V default to use device-trees.
+
+Instead of updating the configuration manually you can add the configuration
+fragment `acpi.config` to the make command for initializing the configuration.
+E.g.
+
+.. code-block:: bash
+
+ make qemu-riscv64_smode_defconfig acpi.config
diff --git a/doc/board/emulation/index.rst b/doc/board/emulation/index.rst
index 932c65adebb..d3d6b8f3d86 100644
--- a/doc/board/emulation/index.rst
+++ b/doc/board/emulation/index.rst
@@ -6,6 +6,7 @@ Emulation
.. toctree::
:maxdepth: 1
+ acpi
blkdev
../../usage/semihosting
qemu-arm
diff --git a/doc/develop/devicetree/control.rst b/doc/develop/devicetree/control.rst
index cbb65c9b177..11c92d440f4 100644
--- a/doc/develop/devicetree/control.rst
+++ b/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.