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In asc_vsbus_attach() the SCSI id for the controller is read from some
clock chip NVRAM. This causes a segv in kernel mode for the KA53 which
seems to lack the clock chip. OpenBSD uses a hardcoded SCSI id 6 for all
systems but KA46, but since the existing code works with KA48 and KA49
too I made the hardcoded value a special case for the KA53.


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%SYSTEM-F-ANARCHISM, The operating system has been overthrown

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Index: asc_vsbus.c
===================================================================
RCS file: /cvsroot/src/sys/arch/vax/vsa/asc_vsbus.c,v
retrieving revision 1.35
diff -u -r1.35 asc_vsbus.c
--- asc_vsbus.c	4 Mar 2007 19:21:56 -0000	1.35
+++ asc_vsbus.c	29 Jul 2007 08:53:04 -0000
@@ -249,8 +249,18 @@
 	error = bus_dmamap_create(asc->sc_dmat, ASC_MAXXFERSIZE, 1, 
 	    ASC_MAXXFERSIZE, 0, BUS_DMA_NOWAIT, &asc->sc_dmamap);
 
-	/* SCSI ID is store in the clock NVRAM at magic address 0xbc */
-	sc->sc_id = (clk_page[0xbc/2] >> clk_tweak) & 7;
+	switch (vax_boardtype) {
+#if defined(VAX53)
+	case VAX_BTYP_53:
+		sc->sc_id = 6; /* XXX need to get this from VMB */
+		break;
+#endif
+	default:
+		/* SCSI ID is store in the clock NVRAM at magic address 0xbc */
+		sc->sc_id = (clk_page[0xbc/2] >> clk_tweak) & 7;
+		break;
+	}
+
 	sc->sc_freq = ASC_FREQUENCY;
 
 	/* gimme MHz */

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