diff --git a/tools/hardware/memory.py b/tools/hardware/memory.py
index c02b9881dc..b5e36e9b3b 100644
--- a/tools/hardware/memory.py
+++ b/tools/hardware/memory.py
@@ -84,36 +84,6 @@ def reserve(self, excluded):
                                              self.base + self.size, self.owner))
         return ret
 
-    def align_base(self, align_bits):
-        ''' align this region up to a given number of bits '''
-        new_base = hardware.utils.align_up(self.base, align_bits)
-        diff = new_base - self.base
-        if self.size < diff:
-            raise ValueError(
-                'can''t align region base to {} bits, {} too small'.format(
-                    align_bits, self))
-        # This could become an empty region now. We don't care, the caller has
-        # to check if this region still fits its needs.
-        return Region(new_base, self.size - diff, self.owner)
-
-    def align_size(self, align_bits):
-        ''' align this region's size to a given number of bits.
-         will move the base address down and the region's size
-         up '''
-        new_base = hardware.utils.align_down(self.base, align_bits)
-        new_size = hardware.utils.align_up(self.size, align_bits)
-        return Region(new_base, new_size, self.owner)
-
-    def make_chunks(self, chunksz):
-        base = self.base
-        size = self.size
-        ret = []
-        while size > 0:
-            ret.append(Region(base, min(size, chunksz), self.owner))
-            base += chunksz
-            size -= chunksz
-        return ret
-
     def cut_from_start(self, size: int) -> Region:
         ''' Cut off a region from the start and return it, no owner is set.
         Adjust the original region's size.'''
diff --git a/tools/hardware/utils/rule.py b/tools/hardware/utils/rule.py
index 829272d54b..8131794196 100644
--- a/tools/hardware/utils/rule.py
+++ b/tools/hardware/utils/rule.py
@@ -46,10 +46,21 @@ def __init__(self, region: Region, kernel_name: str, page_bits: int, max_size: i
         self.user_ok = user_ok
 
         region.size = min(max_size, region.size)
-        aligned = region.align_size(page_bits)
-        self.size = aligned.size
-        self.base = aligned.base
-        self.regions = aligned.make_chunks(1 << page_bits)
+
+        self.size = hardware.utils.align_down(region.base, align_bits)
+        self.base = hardware.utils.align_up(region.size, align_bits)
+
+        chunks = []
+        chunk_size = 1 << page_bits
+        base = self.base
+        size = self.size
+        while size > 0:
+            regions
+            chunks.append(Region(base, min(size, chunk_size), self.owner))
+            base += chunk_size
+            size -= chunk_size
+        self.regions = chunks
+
         self.labels[kernel_name] = region.base - aligned.base
 
     def has_macro(self):