Add a hack for SPARC64 V CPUs, which set some undocumented bits in the

first data word.
2010-05-02 12:08:15 +00:00 · 2010-05-02 12:08:15 +00:00 · d5713c1a66
commit d5713c1a66
parent 90843ddc5c
1 changed files with 5 additions and 2 deletions
--- a/sys/sparc64/sparc64/interrupt.S
+++ b/sys/sparc64/sparc64/interrupt.S
@ -83,8 +83,11 @@ ENTRY(intr_vector)
 	 * The 2nd word points to code to execute and the 3rd is an argument
 	 * to pass.  Jump to it.
 	 */
-	brnz,a,pt %g3, 1f
-	 nop
+	brnz,pt %g3, 1f
+	/*
+	 * NB: Zeus CPUs set some undocumented bits in the first data word.
+	 */
+	 and	%g3, IV_MAX - 1, %g3
 	jmpl	%g4, %g0
 	 nop
 	/* NOTREACHED */