python: make Region parameter owner optional

Also ensure the description is created correctly.

Signed-off-by: Axel Heider <axelheider@gmx.de>

tools/hardware/config.py

@@ -59,7 +59,7 @@ class ARMConfig(Config):
         extra_reserved = set()
 
         new = ret[0].align_base(self.get_kernel_phys_align())
-        resv = Region(ret[0].base, new.base - ret[0].base, None)
+        resv = Region(ret[0].base, new.base - ret[0].base)
         extra_reserved.add(resv)
         ret[0] = new
 
@@ -86,7 +86,7 @@ class RISCVConfig(Config):
 
         physBase = ret[0].base
 
-        resv = Region(ret[0].base, self.get_bootloader_reserve(), None)
+        resv = Region(ret[0].base, self.get_bootloader_reserve())
         extra_reserved.add(resv)
         ret[0].base += self.get_bootloader_reserve()
         ret[0].size -= self.get_bootloader_reserve()

tools/hardware/memory.py

@@ -13,7 +13,7 @@ import hardware.utils as utils
 class Region:
     ''' Represents a region of memory. '''
 
-    def __init__(self, base: int, size: int, owner: 'WrappedNode'):
+    def __init__(self, base: int, size: int, owner: 'WrappedNode' = None):
         self.base = base
         self.size = size
         self.owner = owner
@@ -48,7 +48,7 @@ class Region:
         return hash((self.base, self.size))
 
     @staticmethod
-    def from_range(start, end, owner):
+    def from_range(start, end, owner=None):
         ''' create a region from a start/end rather than start/size '''
         if start > end:
             raise ValueError(

tools/hardware/utils/memory.py

@@ -100,7 +100,7 @@ def get_addrspace_exclude(regions: List[Region], config: Config):
     # We can't create untypeds that exceed the addrspace_max, so we round down to the smallest
     # untyped size alignment so that the kernel will be able to turn the entire range into untypeds.
     as_max = utils.align_down(config.addrspace_max, config.get_smallest_kernel_object_alignment())
-    ret.add(Region(0, as_max, None))
+    ret.add(Region(0, as_max))
 
     for reg in regions:
         if type(reg) == KernelRegionGroup:

tools/hardware/utils/rule.py

@@ -39,7 +39,7 @@ class KernelRegionGroup:
 
     def __init__(self, region: Region, kernel_name: str, page_bits: int, max_size: int, condition_macro: str = None, user_ok: bool = False):
         self.macro = condition_macro
-        self.desc = region.owner.path
+        self.desc = region.owner.path if region.owner else 'dynamically generated region'
         self.kernel_offset = -1
         self.page_bits = page_bits
         self.labels = {}  # dict of label => offset within region.