Commit Graph

14 Commits

Author SHA1 Message Date
Alexander Graf 711934334e fdt: move dumpdtb interpretation code to device_tree.c
The dumpdtb code can be useful in more places than just for e500. Move it
to a generic place.

Signed-off-by: Alexander Graf <agraf@suse.de>
2012-10-05 02:35:11 +02:00
Peter Maydell f0aa713f65 device_tree: Add support for reading device tree properties
Add support for reading device tree properties (both generic
and single-cell ones) to QEMU's convenience wrapper layer.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter A. G. Crosthwaite <peter.crosthwaite@petalogix.com>
2012-07-20 13:34:50 +01:00
Alexander Graf 45e9dfb2fd dt: make setprop argument static
Whatever we pass in to qemu_devtree_setprop to put into the device tree
will not get modified by that function, so it can easily be declared const.

Signed-off-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@petalogix.com>
2012-06-24 01:04:51 +02:00
Alexander Graf bb28eb3797 dt: add helper for 64bit cell adds
Some times in the device tree, we find an array of 2 u32 cells that
really are a single u64 value. This patch adds a helper to make the
creation of these easy.

Signed-off-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@petalogix.com>
2012-06-24 01:04:46 +02:00
Alexander Graf 3601b57282 dt: add helper for phandle allocation
Phandle references work by having 2 pieces:

  - a "phandle" 1-cell property in the device tree node
  - a reference to the same value in a property we want to point
    to the other node

To generate the 1-cell property, we need an allocation mechanism that
gives us a unique number space. This patch adds an allocator for these
properties.

Signed-off-by: Alexander Graf <agraf@suse.de>
2012-06-24 01:04:46 +02:00
Alexander Graf ce36252cc1 dt: add helper for empty dt creation
We want to get rid of the concept of loading an external device tree and instead
generate our own. However, to do this we need to also create a device tree
template programatically.

This patch adds a helper to create an empty device tree in memory.

Signed-off-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@petalogix.com>
2012-06-24 01:04:46 +02:00
Alexander Graf 7d5fd1089c dt: add helper for phandle enumeration
This patch adds a helper to search for a node's phandle by its path. This
is especially useful when the phandle is part of an array, not just a single
cell in which case qemu_devtree_setprop_phandle would be the easy choice.

Signed-off-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@petalogix.com>
2012-06-24 01:04:46 +02:00
Alexander Graf 8535ab1258 dt: add helper for phandle references
Phandles are the fancy device tree name for "pointer to another node".
To create a phandle property, we most likely want to reference to the
node we're pointing to by its path. So create a helper that allows
us to do so.

Signed-off-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@petalogix.com>
2012-06-24 01:04:46 +02:00
Alexander Graf 7ae2291e8e dt: add helpers for multi-cell adds
We have device tree helpers that allow us to create single cell (u32)
wide properties. However, when creating properties that contain an array of
cells, we need to jump through hoops, manually passing in an array with
converted endianness.

To ease the pain of this, create a generic macro helper that allows us
to pass the cells as arguments.

Signed-off-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@petalogix.com>
2012-06-24 01:04:46 +02:00
Alexander Graf 80ad781643 device tree: add add_subnode command
We want to be able to create subnodes in our device tree, so export it through
the qemu device tree abstraction framework.

Signed-off-by: Alexander Graf <agraf@suse.de>
2011-10-06 09:48:00 +02:00
Alexander Graf d69a8e6387 device tree: add nop_node
We have a qemu internal abstraction layer on FDT. While I'm not fully convinced
we need it at all, it's missing the nop_node functionality that we now need
on e500. So let's add it and think about the general future of that API later.

Signed-off-by: Alexander Graf <agraf@suse.de>
2011-10-06 09:43:34 +02:00
David Gibson c489749030 Allow qemu_devtree_setprop() to take arbitrary values
Currently qemu_devtree_setprop() expects the new property value to be
given as a uint32_t *.  While property values consisting of u32s are
common, in general they can have any bytestring value.

Therefore, this patch alters the function to take a void * instead,
allowing callers to easily give anything as the property value.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 18:34:54 +02:00
pbrook 7ec632b45c Wean device tree code off phys_ram_base.
Signed-off-by: Paul Brook <paul@codesourcery.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@7068 c046a42c-6fe2-441c-8c8c-71466251a162
2009-04-10 16:23:59 +00:00
aurel32 f652e6af11 Implement device tree support needed for Bamboo emulation
To implement the -kernel, -initrd, and -append options, 4xx board emulation
must load the guest kernel as if firmware had loaded it. Where u-boot would be
the firmware, we must load the flat device tree into memory and set key fields
such as /chosen/bootargs.

This patch introduces a dependency on libfdt for flat device tree support.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6064 c046a42c-6fe2-441c-8c8c-71466251a162
2008-12-16 10:43:48 +00:00