add DOL file loader

2022-06-01 13:00:43 -07:00
parent 40aa08bd4f
commit 562bc4a40c
20 changed files with 948 additions and 264 deletions
@@ -0,0 +1,18 @@
+# This macro clears the data and instruction caches at the beginning of each
+# function. This is necessary because apparently some versions of PSO don't do
+# this correctly by themselves.
+
+# This macro expects to be run immediately at the entrypoint (usually the start
+# label) for all functions. It returns the original return address in r12, and
+# the address of the start label in r11.
+  mflr   r12  # r12 = address to return to
+  mfctr  r3  # r3 = address of start label (this code is called via bctrl)
+  addi   r4, r3, 0x7C00  # r4 = end of relevant region
+InitClearCaches__next_cache_block:
+  dcbst  r0, r3
+  sync
+  icbi   r0, r3
+  addi   r3, r3, 0x20
+  cmpl   r3, r4
+  blt    InitClearCaches__next_cache_block
+  isync