From 141c876c43e192bc2ecaf9da399849e782245131 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Sat, 24 May 1997 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1997-05-24

---
 ip/gre.c | 15 +--------------
 pc/mp.c  | 15 ++++++++++++---
 2 files changed, 13 insertions(+), 17 deletions(-)

diff --git a/ip/gre.c b/ip/gre.c
index 5621abf642d413c7d5ee5968c098711af688aa5d..ec617b422a1662a657ad09cd8a8448181d61021f 100644
--- a/ip/gre.c
+++ b/ip/gre.c
@@ -121,8 +121,7 @@ static void
 grekick(Conv *c, int l)
 {
 	GREhdr *ghp;
-	Block *bp, *f;
-	int dlen;
+	Block *bp;
 
 	USED(l);
 
@@ -130,18 +129,6 @@ grekick(Conv *c, int l)
 	if(bp == nil)
 		return;
 
-	/* Round packet up to even number of bytes */
-	dlen = blocklen(bp);
-	if(dlen & 1) {
-		for(f = bp; f->next; f = f->next)
-			;
-		if(f->wp >= f->lim) {
-			f->next = allocb(1);
-			f = f->next;
-		}
-		*f->wp++ = 0;
-	}
-
 	/* Make space to fit ip header (gre header already there) */
 	bp = padblock(bp, GRE_IPHDRSIZE);
 	if(bp == nil)
diff --git a/pc/mp.c b/pc/mp.c
index d4d200c58849eb4e5a457c601b00b041d758d1c6..ab2d9673896f03800c40f0fa80f8eb9340018096 100644
--- a/pc/mp.c
+++ b/pc/mp.c
@@ -207,9 +207,18 @@ mpintrinit(Bus* bus, PCMPintr* intr, int vector)
 		break;
 
 	case PcmpExtINT:
-po = PcmpHIGH;
-el = PcmpEDGE;
 		v |= ApicExtINT;
+		/*
+		 * The AMI Goliath doesn't boot successfully with it's LINTR0 entry
+		 * which decodes to low+level. The PPro manual says ExtINT should be
+		 * level, whereas the Pentium is edge. Setting the Goliath to edge+high
+		 * seems to cure the problem. Other PPro MP tables (e.g. ASUS P/I-P65UP5
+		 * have a entry which decodes to edge+high, so who knows.
+		 * Perhaps it would be best just to not set an ExtINT entry at all,
+		 * it shouldn't be needed for SMP mode.
+		 */
+		po = PcmpHIGH;
+		el = PcmpEDGE;
 		break;
 	}
 
@@ -587,7 +596,7 @@ mpintrenable(int v, int tbdf, Irqctl* irqctl)
 	int r;
 
 	r = mpintrenablex(v, tbdf, irqctl);
-	if(r == -1 && tbdf != BUSUNKNOWN && _mp_->specrev == 1)
+	if(r == -1 && tbdf != BUSUNKNOWN /*&& _mp_->specrev == 1*/)
 		return mpintrenablex(v, BUSUNKNOWN, irqctl);
 	return r;
 }