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# SPDX-License-Identifier: MIT
from m1n1.utils import align_up
def collect_aic_irqs_in_use(adt):
used = set()
aic_phandle = getattr(adt["/arm-io/aic"], "AAPL,phandle")
for node in adt.walk_tree():
if not hasattr(node, "interrupt_parent") or \
node.interrupt_parent != aic_phandle:
continue
for no in node.interrupts:
used.add(no)
return used
def usable_aic_irq_range(adt):
# These are too optimistic but since we allocate
# from the bottom of the range it doesn't matter much.
return {
"aic,1": range(0, 0x400),
"aic,2": range(0, 0x1000),
}.get(adt["/arm-io/aic"].compatible[0])
def alloc_aic_irq(adt):
used = collect_aic_irqs_in_use(adt)
for no in usable_aic_irq_range(adt):
if no not in used:
return no
return None
def usable_mmio_range(adt):
arm_io_range = adt["arm-io"].ranges[0]
return range(arm_io_range.parent_addr, arm_io_range.parent_addr + arm_io_range.size)
def alloc_mmio_base(adt, size, alignment=0x4000):
span = usable_mmio_range(adt)
la = adt.build_addr_lookup()
for zone, devs in la.populate(span):
if len(devs) != 0:
continue
base = align_up(zone.start, alignment)
if zone.stop > base + size:
return base
return None
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