Module Name: src
Committed By: macallan
Date: Sun Dec 18 01:16:05 UTC 2022
Modified Files:
src/sys/arch/macppc/macppc: locore.S
Log Message:
add comment to explain why we zero SPRG0 here
NFC
To generate a diff of this commit:
cvs rdiff -u -r1.81 -r1.82 src/sys/arch/macppc/macppc/locore.S
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/macppc/macppc/locore.S
diff -u src/sys/arch/macppc/macppc/locore.S:1.81 src/sys/arch/macppc/macppc/locore.S:1.82
--- src/sys/arch/macppc/macppc/locore.S:1.81 Sun Dec 18 01:10:57 2022
+++ src/sys/arch/macppc/macppc/locore.S Sun Dec 18 01:16:05 2022
@@ -1,4 +1,4 @@
-/* $NetBSD: locore.S,v 1.81 2022/12/18 01:10:57 macallan Exp $ */
+/* $NetBSD: locore.S,v 1.82 2022/12/18 01:16:05 macallan Exp $ */
/*
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
@@ -92,6 +92,11 @@ __start:
mr %r13,%r6
mr %r14,%r7
+/*
+ * Zero SPRG0 so we can catch usage of curcpu(), which just returns SPRG0,
+ * before it is set up properly. Console output uses locks now, which need
+ * working curcpu(), and macppc sets up its console *very* early.
+ */
#ifdef DEBUG
li %r0,0
mtsprg0 %r0
