Good news, The FDT works. For testing purposes, I used a different DTB file
provided by
raspberrpi foundation. It has a different structure than the DTB from
FreeBSD, so I modified the
initialization code a little bit, but anyhow it works, the registers are
initialized from the DTB file. But they are
virtual addresses we need to offset them before initializing the registers.
(gdb) p pl011_context
$23 = {base = {lock = {interrupt = {<No data fields>}, mutex = {_Queue =
{_Lock = {_next_ticket = 0,
_now_serving = 0}, _heads = 0x0, _owner = 0x0, _name = 0x0}}},
lock_acquire = 0x2095d1 <rtems_termios_device_lock_acquire_default>,
lock_release = 0x2095e1 <rtems_termios_device_lock_release_default>},*
regs = 0x7e201000*, irq = 0,
initial_baud = 0}
(gdb)
I will add the offset function, and send in the patch. I am also planning
to replace a manual search with
fdt_node_offset_by_compatible.
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