Generate dmadata

Makefile

@@ -37,7 +37,13 @@ build/src/boot_O2_g3/%: CC := python3 preprocess.py $(CC) -- $(AS) $(ASFLAGS) --
 build/src/code/%: CC := python3 preprocess.py $(CC) -- $(AS) $(ASFLAGS) --
 
 BASEROM_FILES := $(wildcard baserom/*)
-BASEROM_O_FILES := $(BASEROM_FILES:baserom/%=build/baserom/%.o)
+# Exclude dmadata, it will be generated right before packing the rom
+BASEROM_FILES := $(subst baserom/dmadata ,,$(BASEROM_FILES))
+BASEROM_BUILD_FILES := $(BASEROM_FILES:baserom/%=build/baserom/%)
+
+DECOMP_FILES := $(wildcard decomp/*)
+COMP_FILES := $(DECOMP_FILES:decomp/%=build/comp/%.yaz0)
+
 S_FILES := $(wildcard asm/*)
 S_O_FILES = $(S_FILES:asm/%.asm=build/asm/%.o)
 C_FILES := $(wildcard src/libultra/*) \
@@ -89,6 +95,9 @@ test.txt: build/src/test.o
 clean:
 	rm $(ROM) code.elf code.bin boot.bin -r build
 
+build/baserom/dmadata: $(COMP_FILES) $(BASEROM_BUILD_FILES)
+	python3 dmadata.py
+
 # Recipes
 
 build/baserom/%: baserom/%

dmadata.py

@@ -0,0 +1,64 @@
+import os
+import struct
+import sys
+
+OUT = 'build/baserom/dmadata'
+
+from dmadata_table import *
+
+def align_up(base, align_to):
+    return ((base + align_to - 1) // align_to) * align_to
+
+if __name__ == "__main__":
+    with open(OUT, 'wb') as dmadata:
+        curr_vrom = 0
+        curr_phys = 0
+        for base_file, comp_file, alignment, size_if_missing in dmadata_table:
+            try:
+                uncompressed = comp_file == ''
+                missing = base_file == '' and comp_file == ''
+                blank = missing and size_if_missing == 0
+                is_dmadata = base_file == 'dmadata'
+
+                alignment = max(alignment, 0x10)
+
+                if missing:
+                    vrom_size = size_if_missing
+                    phys_size = 0
+                elif is_dmadata:
+                    vrom_size = len(dmadata_table) * 0x10
+                    phys_size = vrom_size
+                else:
+                    vrom_size = os.path.getsize(base_file)
+                    if uncompressed:
+                        phys_size = vrom_size
+                    else:
+                        phys_size = os.path.getsize(comp_file)
+
+                if blank:
+                    vrom_start = 0
+                    vrom_end = 0
+                else:
+                    vrom_start = align_up(curr_vrom, alignment)
+                    vrom_end = vrom_start + vrom_size
+
+                if blank:
+                    phys_start = 0
+                    phys_end = 0
+                elif missing:
+                    phys_start = 0xFFFFFFFF
+                    phys_end = 0xFFFFFFFF
+                else:
+                    phys_start = align_up(curr_phys, 0x10)
+                    phys_end = 0 if uncompressed else phys_start + phys_size
+
+                curr_vrom = align_up(curr_vrom, alignment) + vrom_size
+                curr_phys = align_up(curr_phys, 0x10) + phys_size
+
+                dmadata.write(vrom_start.to_bytes(4, 'big'))
+                dmadata.write(vrom_end.to_bytes(4, 'big'))
+                dmadata.write(phys_start.to_bytes(4, 'big'))
+                dmadata.write(phys_end.to_bytes(4, 'big'))
+            except:
+                print('Error when processing entry ' + base_file)
+                sys.exit(1)