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2012-07-20device_tree: Add support for reading device tree propertiesPeter Maydell1-0/+30
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>
2012-06-24dt: make setprop argument staticAlexander Graf1-1/+1
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>
2012-06-24dt: Add global option to set phandle start offsetAlexander Graf1-1/+27
If anyone outside of QEMU wants to mess with a QEMU generated device tree, he needs to know which range phandles are valid in. So let's expose a machine option that an external program can use to set the start allocate id for phandles in QEMU. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-06-24Revert "dt: temporarily disable subtree creation failure check"Alexander Graf1-2/+0
This reverts commit "dt: temporarily disable subtree creation failure check" which was meant as a temporary solution to keep external and dynamic device tree construction intact. Now that we switched to fully dynamic dt construction, it's no longer necessary. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-06-24dt: add helper for 64bit cell addsAlexander Graf1-0/+7
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>
2012-06-24dt: add helper for phandle allocationAlexander Graf1-0/+7
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>
2012-06-24dt: add helper for empty dt creationAlexander Graf1-0/+37
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>
2012-06-24dt: add helper for phandle enumerationAlexander Graf1-1/+15
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>
2012-06-24dt: temporarily disable subtree creation failure checkAlexander Graf1-0/+2
Usually we want to know when creating a subtree fails. However, while introducing this patch set we have to modify the device tree and some times have the code to create a subtree in both the binary tree and the dynamically created tree. So ignore failures about this for now and enable them once we got rid of the binary device tree. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-06-24dt: add helper for phandle referencesAlexander Graf1-0/+8
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>
2012-06-24dt: allow add_subnode to create root subnodesAlexander Graf1-1/+6
Our subnode creation helper can't handle creation of root subnodes, like "/memory". Fix this by allowing the parent node to be an empty string, indicating the root node. Signed-off-by: Alexander Graf <agraf@suse.de> Reviewed-by: Peter Crosthwaite <peter.crosthwaite@petalogix.com>
2011-10-26device_tree: Fix potential memory leakStefan Weil1-0/+1
cppcheck error report: device_tree.c:156: error: Memory leak: dupname Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-10-06device tree: give dt more sizeAlexander Graf1-0/+1
We currently load a device tree blob and then just take its size x2 to account for modifications we do inside. While this is nice and great, it fails when we have a small device tree as blob and lots of nodes added in machine init code. So for now, just make it 20k bigger than it was before. We maybe want to be more clever about this later. Signed-off-by: Alexander Graf <agraf@suse.de>
2011-10-06device tree: dont fail operationsAlexander Graf1-25/+51
When we screw up and issue an FDT command that doesn't work, we really need to know immediately and usually can't continue to create the machine. To make sure we don't need to add error checking in all device tree modification code users, we can just add the fail checks to the qemu abstract functions. Signed-off-by: Alexander Graf <agraf@suse.de>
2011-10-06device tree: add add_subnode commandAlexander Graf1-0/+24
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>
2011-10-06device tree: add nop_nodeAlexander Graf1-0/+11
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>
2011-08-20Use glib memory allocation and free functionsAnthony Liguori1-2/+2
qemu_malloc/qemu_free no longer exist after this commit. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-04-15Remove unused sysemu.h include directivesBlue Swirl1-1/+0
Remove unused sysemu.h include directives to speed up build with the following patches. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-04-01Allow qemu_devtree_setprop() to take arbitrary valuesDavid Gibson1-1/+1
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>
2009-09-23Fix device tree compile broken by ca20cf32ab3d945155141ef737f5d08ebb373e1dBlue Swirl1-0/+1
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2009-05-24Remove unused variablePaul Brook1-1/+0
Signed-off-by: Paul Brook <paul@codesourcery.com>
2009-04-10Wean device tree code off phys_ram_base.pbrook1-18/+18
Signed-off-by: Paul Brook <paul@codesourcery.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@7068 c046a42c-6fe2-441c-8c8c-71466251a162
2009-02-05toplevel: remove error handling from qemu_malloc() callers (Avi Kivity)aliguori1-4/+0
Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6531 c046a42c-6fe2-441c-8c8c-71466251a162
2008-12-16Implement device tree support needed for Bamboo emulationaurel321-0/+114
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
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