From d54baa15f1f0ada1ac5523c7df665b04d460c487 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Sun, 15 Mar 1992 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1992-03-15

---
 gnot/mmu.c      |  2 +-
 port/devlance.c | 13 ++++++++++++-
 port/devmnt.c   | 14 +++++---------
 port/page.c     | 24 ++++++++++++++----------
 4 files changed, 32 insertions(+), 21 deletions(-)

diff --git a/gnot/mmu.c b/gnot/mmu.c
index 38438fd165930cc5f7874d93e46d876ea1225667..1e5eb37130c36846c616d26b58e6e11419a98f48 100644
--- a/gnot/mmu.c
+++ b/gnot/mmu.c
@@ -94,7 +94,7 @@ kmapinit(void)
 	}
 
 	e = (MB4 - 256*1024)/BY2PG;	/* screen lives at top 256K */
-	i = PGROUND(((ulong)ialloc(0, 0))&~KZERO)/BY2PG;
+	i = PGROUND(palloc.addr0)/BY2PG;
 
 	print("%lud free map registers\n", e-i);
 
diff --git a/port/devlance.c b/port/devlance.c
index c6380c6f4261edb20c2f676e4facc902be9daa69..dddf74ad1eca3841a1584eb8d3a8b40c9c41f2a9 100644
--- a/port/devlance.c
+++ b/port/devlance.c
@@ -93,6 +93,7 @@ typedef struct {
 
 	Lance;			/* host dependent lance params */
 	int	prom;		/* number of promiscuous channels */
+	int	all;		/* number of channels listening to all packets */
 	Network	net;
 	Netprot	prot[Ntypes];
 
@@ -245,6 +246,11 @@ lancestclose(Queue *q)
 			lancestart(0, 1);
 		qunlock(&l);
 	}
+	if(et->type == -1){
+		qlock(&l);
+		l.all--;
+		qunlock(&l);
+	}
 	qlock(et);
 	et->type = 0;
 	et->q = 0;
@@ -277,6 +283,11 @@ lanceoput(Queue *q, Block *bp )
 		e = q->ptr;
 		if(streamparse("connect", bp)){
 			e->type = strtol((char *)bp->rptr, 0, 0);
+			if(e->type == -1){
+				qlock(&l);
+				l.all++;
+				qunlock(&l);
+			}
 		} else if(streamparse("promiscuous", bp)) {
 			e->prom = 1;
 			qlock(&l);
@@ -309,7 +320,7 @@ lanceoput(Queue *q, Block *bp )
 		}
 		return;
 	}
-	if(memcmp(l.bcast, p->d, sizeof(l.bcast)) == 0 || l.prom){
+	if(memcmp(l.bcast, p->d, sizeof(l.bcast)) == 0 || l.prom || l.all){
 		len = blen(bp);
 		nbp = copyb(bp, len);
 		nbp = expandb(nbp, len >= ETHERMINTU ? len : ETHERMINTU);
diff --git a/port/devmnt.c b/port/devmnt.c
index 412f04f9267b9b939329ae1fe3d7459e4dc0c477..7e529e38fba5894cc4aac7d1a775573a12daefed 100644
--- a/port/devmnt.c
+++ b/port/devmnt.c
@@ -93,19 +93,15 @@ mntreset(void)
 	mntalloc.rpcarena = mntalloc.rpcfree;
 	re = &mntalloc.rpcfree[conf.nmntbuf];
 
-	/* Align mount buffers to 256 byte boundaries so we can use burst mode vme transfers */
-	p = (ulong)ialloc(0, 0);
-	if(p&(ALIGN-1))
-		ialloc(ALIGN-(p&(ALIGN-1)), 0);
-
-	i = MAXRPC+(ALIGN-1);
-	i &= ~(ALIGN-1);
-
+	/*
+	 *  Align mount buffers to 256 byte boundaries
+	 *  so we can use burst mode vme transfers
+	 */
 	tag = Tagspace;
 	for(rd = mntalloc.rpcfree; rd < re; rd++) {
 		rd->list = rd+1;
 		rd->request.tag = tag++;
-		rd->rpc = ialloc(i, 0);
+		rd->rpc = iallocspan(MAXRPC, ALIGN, 0);
 	}
 	re[-1].list = 0;
 	for(md = mntalloc.mntfree; md < me; md++){
diff --git a/port/page.c b/port/page.c
index 7d8cc78c7b2a5d7e2bcb7d76f244d8d2e0fea3f0..735c1fda947e08d830b803a746a8ce839609e35b 100644
--- a/port/page.c
+++ b/port/page.c
@@ -17,7 +17,8 @@ struct Ptealloc
 	int	pages;
 }ptealloclk;
 
-extern long end;
+extern	long end;
+ulong	hiaddr;
 static Lock pglock;
 
 /* Multiplex a hardware lock for per page manipulations */
@@ -63,14 +64,6 @@ enum
 Region region[Nregion];
 
 
-/*
- *  Called to allocate permanent data structures, before calling pageinit().
- *  We assume all of text+data+bss is in the first memory bank.
- *
- *  alignment is in number of bytes
- *
- *  WARNING: You can't cross a crevasse!
- */
 void
 addsplit(Region *r, ulong start, ulong end)
 {
@@ -99,6 +92,17 @@ addsplit(Region *r, ulong start, ulong end)
 		}
 	}
 }
+
+/*
+ *  Called to allocate permanent data structures, before calling pageinit().
+ *  We assume all of text+data+bss is in the first memory bank.
+ *
+ *  alignment is in number of bytes.  It pretains both to the start and
+ *  end of the allocated memory.
+ *
+ *  If crevasse is specified, no allocation can span an address that is
+ *  a multiple of crevasse.
+ */
 void*
 iallocspan(ulong n, int align, ulong crevasse)
 {
@@ -131,7 +135,7 @@ iallocspan(ulong n, int align, ulong crevasse)
 
 	p = 0;
 	for(r = region; r < &region[Nregion]; r++){
-		/* allign region */
+		/* align region */
 		p = r->start;
 		if(align){
 			m = p % align;