On Tue, Jul 26, 2011 at 5:03 PM, Hamo <hamo.by(a)gmail.com> wrote:
thinking of extending the resource allocator? How does uboot
do this? What would your device tree look like?
the resource allocator is based on
PCI bus. We need a device's bus
number and device number to allocate resources to it. But on ARM, no
devices are connected to a PCI bus. So the device tree should not have
U-boot uses a register r8 to store an address holding the device tree.
The tree records the information of the hardware on the board. After
U-boot finishes init one device, it writes the device's information to
PCI is an important part of the devicetree, but you should look at
device/device.c and device/root_device.c. The root devices are above
the PCI bus and may be the place to start.