[build] Change memory_layout from csv to yaml

I realized we don't need yet another format for configuration. As a
bonus, yaml also allows for a more descriptive file.

definitions/memory_layout.csv

@@ -1,5 +0,0 @@
-linear,64T,shared
-bitmap,1T,shared
-heap,64G
-stacks,64G
-buffers,64G

definitions/memory_layout.yaml

@@ -0,0 +1,17 @@
+---
+- name: linear
+  size: 64T
+  shared: true
+
+- name: bitmap
+  size: 1T
+  shared: true
+
+- name: heap
+  size: 64G
+
+- name: stacks
+  size: 64G
+
+- name: buffers
+  size: 64G

scripts/memory.py

@@ -4,27 +4,29 @@ class Layout:
 
     sizes = {'G': 1024 ** 3, 'T': 1024 ** 4}
 
-    def __init__(self, path):
-        import csv
-
-        regions = []
-        addr = 1 << 64
-
-        with open(path, newline='') as infile:
-            reader = csv.reader(infile)
-            for row in reader:
-                name, size = row[:2]
-                shared = (len(row) > 2 and "shared" in row[2])
-
-                size, mag = int(size[:-1]), size[-1]
+    @staticmethod
+    def get_size(desc):
+        size, mag = int(desc[:-1]), desc[-1]
 
         try:
             mult = Layout.sizes[mag]
         except KeyError:
             raise RuntimeError(f"No magnitude named '{mag}'.")
 
-                size *= mult
+        return size * mult
+
+    def __init__(self, path):
+        from yaml import safe_load
+
+        regions = []
+        addr = 1 << 64
+
+        with open(path, 'r') as infile:
+            data = safe_load(infile.read())
+            for r in data:
+                size = Layout.get_size(r["size"])
                 addr -= size
-                regions.append(Layout.Region(name, addr, size, shared))
+                regions.append(Layout.Region(r["name"], addr, size,
+                    r.get("shared", False)))
 
         self.regions = tuple(regions)

src/kernel/kernel.module

@@ -68,7 +68,7 @@ kernel = module("kernel",
 from glob import glob
 from os.path import join
 
-layout = join(source_root, "definitions/memory_layout.csv")
+layout = join(source_root, "definitions/memory_layout.yaml")
 definitions = glob('definitions/**/*.def', recursive=True)
 
 kernel.add_depends(["memory.h.cog"], [layout])

src/kernel/memory.h.cog

@@ -37,7 +37,7 @@ constexpr unsigned kernel_buffer_pages = 16;
 from os.path import join
 from memory import Layout
 
-layout = Layout(join(definitions_path, "memory_layout.csv"))
+layout = Layout(join(definitions_path, "memory_layout.yaml"))
 l = max([len(r.name) for r in layout.regions])
 
 for region in layout.regions:

src/libraries/bootproto/bootproto.module

@@ -8,5 +8,5 @@ bp = module("bootproto",
 
 from os.path import join
 
-layout = join(source_root, "definitions/memory_layout.csv")
+layout = join(source_root, "definitions/memory_layout.yaml")
 bp.add_input("include/bootproto/memory.h.cog", deps=[layout])

src/libraries/bootproto/include/bootproto/memory.h.cog

@@ -11,7 +11,7 @@ namespace mem {
 from os.path import join
 from memory import Layout
 
-layout = Layout(join(definitions_path, "memory_layout.csv"))
+layout = Layout(join(definitions_path, "memory_layout.yaml"))
 
 for region in layout.regions:
     if region.shared: