Support for 'default configuration' mpbios attachment was never completed,

so instead of halfway configuring this mode and unconditionally panicing,
just don't attach mpbios at all if this mode is detected during probe.

ok kettenis

1 files changed, 94 insertions, 136 deletions

diff --git a/sys/arch/i386/i386/mpbios.c b/sys/arch/i386/i386/mpbios.c
index c742166e0be..06ed6e64c21 100644
--- a/sys/arch/i386/i386/mpbios.c
+++ b/sys/arch/i386/i386/mpbios.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: mpbios.c,v 1.38 2015/06/07 12:16:27 jsg Exp $	*/
+/*	$OpenBSD: mpbios.c,v 1.39 2016/04/21 22:13:27 mlarkin Exp $	*/
 /*	$NetBSD: mpbios.c,v 1.2 2002/10/01 12:56:57 fvdl Exp $	*/
 
 /*-
@@ -130,10 +130,6 @@
 extern int haveacpibutusingapm;
 #endif
 
-static struct mpbios_ioapic default_ioapic = {
-    2, 0, 1, IOAPICENTRY_FLAG_EN, (caddr_t)IOAPIC_BASE_DEFAULT
-};
-
 /* descriptions of MP basetable entries */
 struct mpbios_baseentry {
 	u_int8_t  	type;
@@ -359,16 +355,14 @@ mpbios_probe(struct device *self)
 		    self->dv_xname, loc_where[scan_loc], mp_fp_map.pa);
 
 	if (mp_fps->pap == 0) {
-		if (mp_fps->mpfb1 == 0) {
+		if (mp_fps->mpfb1 == 0)
 			printf("%s: MP fps invalid: "
 			    "no default config and no configuration table\n",
 			    self->dv_xname);
-
-			goto err;
-		}
-		printf("%s: MP default configuration %d\n",
-		    self->dv_xname, mp_fps->mpfb1);
-		return (10);
+		else
+			printf("%s: MP default configuration %d not "
+    			    "supported\n", self->dv_xname, mp_fps->mpfb1);
+		goto err;
 	}
 
 	cthpa = mp_fps->pap;
@@ -395,7 +389,7 @@ mpbios_probe(struct device *self)
 		    self->dv_xname);
 		goto err;
 	}
-	return (10);
+	return (1);
 
  err:
 	if (mp_fps) {
@@ -547,138 +541,102 @@ mpbios_scan(struct device *self)
 
 	lapic_boot_init(lapic_base);
 
-	/* check for use of 'default' configuration */
-	if (mp_fps->mpfb1 != 0) {
-		struct mpbios_proc pe;
-
-		printf("%s: MP default configuration %d\n",
-		    self->dv_xname, mp_fps->mpfb1);
-
-		/* use default addresses */
-		pe.apic_id = cpu_number();
-		pe.cpu_flags = PROCENTRY_FLAG_EN|PROCENTRY_FLAG_BP;
-		pe.cpu_signature = cpu_info_primary.ci_signature;
-		pe.feature_flags = cpu_info_primary.ci_feature_flags;
-
-		mpbios_cpu((u_int8_t *)&pe, self);
-
-		pe.apic_id = 1 - cpu_number();
-		pe.cpu_flags = PROCENTRY_FLAG_EN;
-
-		mpbios_cpu((u_int8_t *)&pe, self);
-
-		mpbios_ioapic((u_int8_t *)&default_ioapic, self);
-
-		/* XXX */
-		printf("%s: WARNING: interrupts not configured\n",
-		    self->dv_xname);
-		panic("lazy bum");
-		return;
-	} else {
-		/*
-		 * should not happen; mp_probe returns 0 in this case,
-		 * but..
-		 */
-		if (mp_cth == NULL)
-			panic("mpbios_scan: no config (can't happen?)");
+	/*
+	 * Walk the table once, counting items
+	 */
+	for (count = mp_cth->entry_count,
+	    position = (const u_int8_t *)mp_cth + sizeof(*mp_cth),
+	    end = position + mp_cth->base_len;
+	    count-- && position < end;
+	    position += mp_conf[type].length) {
+
+		type = *position;
+		if (type >= MPS_MCT_NTYPES) {
+			printf("%s: unknown entry type %x"
+			    " in MP config table\n",
+			    self->dv_xname, type);
+			end = position;
+			break;
+		}
+		mp_conf[type].count++;
+	}
 
-		/*
-		 * Walk the table once, counting items
-		 */
-		for (count = mp_cth->entry_count,
-		    position = (const u_int8_t *)mp_cth + sizeof(*mp_cth),
-		    end = position + mp_cth->base_len;
-		    count-- && position < end;
-		    position += mp_conf[type].length) {
-
-			type = *position;
-			if (type >= MPS_MCT_NTYPES) {
-				printf("%s: unknown entry type %x"
-				    " in MP config table\n",
-				    self->dv_xname, type);
-				end = position;
-				break;
-			}
-			mp_conf[type].count++;
+	/*
+	 * Walk the table twice, counting int and bus entries
+	 */
+	for (count = mp_cth->entry_count,
+	    intr_cnt = 15,	/* presume all isa irqs missing */
+	    position = (const u_int8_t *)mp_cth + sizeof(*mp_cth);
+	    count-- && position < end;
+	    position += mp_conf[type].length) {
+		type = *position;
+		if (type == MPS_MCT_BUS) {
+			const struct mpbios_bus *bp =
+			    (const struct mpbios_bus *)position;
+			if (bp->bus_id >= mp_nbusses)
+				mp_nbusses = bp->bus_id + 1;
 		}
 
 		/*
-		 * Walk the table twice, counting int and bus entries
+		 * Count actual interrupt instances.
+		 * dst_apic_id of MPS_ALL_APICS means "wired to all
+		 * apics of this type".
 		 */
-		for (count = mp_cth->entry_count,
-		    intr_cnt = 15,	/* presume all isa irqs missing */
-		    position = (const u_int8_t *)mp_cth + sizeof(*mp_cth);
-		    count-- && position < end;
-		    position += mp_conf[type].length) {
-			type = *position;
-			if (type == MPS_MCT_BUS) {
-				const struct mpbios_bus *bp =
-				    (const struct mpbios_bus *)position;
-				if (bp->bus_id >= mp_nbusses)
-					mp_nbusses = bp->bus_id + 1;
-			}
-
-			/*
-			 * Count actual interrupt instances.
-			 * dst_apic_id of MPS_ALL_APICS means "wired to all
-			 * apics of this type".
-			 */
-			if ((type == MPS_MCT_IOINT) ||
-			    (type == MPS_MCT_LINT)) {
-				const struct mpbios_int *ie =
-				    (const struct mpbios_int *)position;
-				if (ie->dst_apic_id != MPS_ALL_APICS)
-					intr_cnt++;
-				else if (type == MPS_MCT_IOINT)
-					intr_cnt +=
-					    mp_conf[MPS_MCT_IOAPIC].count;
-				else
-					intr_cnt += mp_conf[MPS_MCT_CPU].count;
-			}
+		if ((type == MPS_MCT_IOINT) ||
+		    (type == MPS_MCT_LINT)) {
+			const struct mpbios_int *ie =
+			    (const struct mpbios_int *)position;
+			if (ie->dst_apic_id != MPS_ALL_APICS)
+				intr_cnt++;
+			else if (type == MPS_MCT_IOINT)
+				intr_cnt +=
+				    mp_conf[MPS_MCT_IOAPIC].count;
+			else
+				intr_cnt += mp_conf[MPS_MCT_CPU].count;
 		}
+	}
 
-		mp_busses = mallocarray(mp_nbusses, sizeof(struct mp_bus),
-		    M_DEVBUF, M_NOWAIT|M_ZERO);
-		mp_intrs = mallocarray(intr_cnt, sizeof(struct mp_intr_map),
-		    M_DEVBUF, M_NOWAIT);
-
-		/* re-walk the table, recording info of interest */
-		position = (const u_int8_t *)mp_cth + sizeof(*mp_cth);
-		count = mp_cth->entry_count;
-		mp_nintrs = 0;
-
-		while ((count--) && (position < end)) {
-			switch (type = *(u_char *)position) {
-			case MPS_MCT_CPU:
-				mpbios_cpu(position, self);
-				break;
-			case MPS_MCT_BUS:
-				mpbios_bus(position, self);
-				break;
-			case MPS_MCT_IOAPIC:
-				mpbios_ioapic(position, self);
-				break;
-			case MPS_MCT_IOINT:
-			case MPS_MCT_LINT:
-				if (mpbios_int(position,
-				    &mp_intrs[mp_nintrs]) == 0)
-					mp_nintrs++;
-				break;
-			default:
-				printf("%s: unknown entry type %x "
-				    "in MP config table\n",
-				    self->dv_xname, type);
-				/* NOTREACHED */
-				return;
-			}
-
-			position += mp_conf[type].length;
+	mp_busses = mallocarray(mp_nbusses, sizeof(struct mp_bus),
+	    M_DEVBUF, M_NOWAIT|M_ZERO);
+	mp_intrs = mallocarray(intr_cnt, sizeof(struct mp_intr_map),
+	    M_DEVBUF, M_NOWAIT);
+
+	/* re-walk the table, recording info of interest */
+	position = (const u_int8_t *)mp_cth + sizeof(*mp_cth);
+	count = mp_cth->entry_count;
+	mp_nintrs = 0;
+
+	while ((count--) && (position < end)) {
+		switch (type = *(u_char *)position) {
+		case MPS_MCT_CPU:
+			mpbios_cpu(position, self);
+			break;
+		case MPS_MCT_BUS:
+			mpbios_bus(position, self);
+			break;
+		case MPS_MCT_IOAPIC:
+			mpbios_ioapic(position, self);
+			break;
+		case MPS_MCT_IOINT:
+		case MPS_MCT_LINT:
+			if (mpbios_int(position,
+			    &mp_intrs[mp_nintrs]) == 0)
+				mp_nintrs++;
+			break;
+		default:
+			printf("%s: unknown entry type %x "
+			    "in MP config table\n",
+			    self->dv_xname, type);
+			/* NOTREACHED */
+			return;
 		}
-		if (mp_verbose && mp_cth->ext_len)
-			printf("%s: MP WARNING: %d "
-			    "bytes of extended entries not examined\n",
-			    self->dv_xname, mp_cth->ext_len);
+
+		position += mp_conf[type].length;
 	}
+	if (mp_verbose && mp_cth->ext_len)
+		printf("%s: MP WARNING: %d "
+		    "bytes of extended entries not examined\n",
+		    self->dv_xname, mp_cth->ext_len);
 
 	/* Clean up. */
 	mp_fps = NULL;