From ee02306e1d3e9ea0496ecac9f8b4311bce3c76f0 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Wed, 8 Nov 2000 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 2000-11-08

---
 bitsy/devuda1341.c | 24 +++++++++++++++---------
 pc/pci.c           | 11 ++++++-----
 2 files changed, 21 insertions(+), 14 deletions(-)

diff --git a/bitsy/devuda1341.c b/bitsy/devuda1341.c
index 8fd102f23c13fdb7cca7d2ef0f356e4b5b3a8f59..6f2225fdd26a110a8d572a91a5914c5b901d5b8b 100644
--- a/bitsy/devuda1341.c
+++ b/bitsy/devuda1341.c
@@ -502,19 +502,25 @@ audioopen(Chan *c, int omode)
 		break;
 
 	case Qaudio:
-		amode = Awrite;
-		switch (omode & 0x7)
-		case OREAD:
-			break;
-		case OWRITE
+		if ((omode & 0x7) > 2)
+			error(Ebadarg);
 		qlock(&audio);
-		if(audio.amode != Aclosed){
+		omode++;
+		if(audio.amode & omode){
 			qunlock(&audio);
 			error(Einuse);
 		}
-		if(audio.bufinit == 0) {
-			audio.bufinit = 1;
-			sbbufinit();
+		if (omode & AudioIn) {
+			/* read */
+			audio.amode |= AudioIn;
+			if((audio.bufinit & AudioIn) == 0) {
+				audio.bufinit |= AudioIn;
+				sbbufinit();
+			}
+		}
+		if (omode & 0x2) {
+			/* write */
+			audio.amode |= 0x2;
 		}
 		audio.amode = amode;
 		setempty();
diff --git a/pc/pci.c b/pc/pci.c
index 32fea605ef60ff73fef57dbf6f13eacc228f49e2..2ef3dc6b06fa1619e7e1b50521f47bba2c832fd7 100644
--- a/pc/pci.c
+++ b/pc/pci.c
@@ -44,8 +44,6 @@ enum
 
 	MaxFNO		= 7,
 	MaxUBN		= 255,
-
-	NOBIOS		= 0,		/* initialise if the BIOS didn't */
 };
 
 enum
@@ -66,6 +64,7 @@ static int pcimaxdno;
 static Pcidev* pciroot;
 static Pcidev* pcilist;
 static Pcidev* pcitail;
+static int nobios;
 
 static int pcicfgrw32(int, int, int, int);
 static int pcicfgrw8(int, int, int, int);
@@ -180,7 +179,7 @@ pcibusmap(Pcidev *root, ulong *pmema, ulong *pioa, int wrreg)
 	Pcisiz *table, *tptr, *mtb, *itb;
 	extern void qsort(void*, long, long, int (*)(void*, void*));
 
-	if(!NOBIOS)
+	if(!nobios)
 		return;
 
 	ioa = *pioa;
@@ -469,7 +468,7 @@ pciscan(int bno, Pcidev** list)
 		sbn = pcicfgr8(p, PciSBN);
 		ubn = pcicfgr8(p, PciUBN);
 
-		if(sbn == 0 || ubn == 0 || NOBIOS) {
+		if(sbn == 0 || ubn == 0 || nobios) {
 			sbn = maxubn+1;
 			/*
 			 * Make sure memory, I/O and master enables are
@@ -509,6 +508,8 @@ pcicfginit(void)
 	if(pcicfgmode != -1)
 		goto out;
 
+	if (getconf("*nobios"))
+		nobios = 1;
 	/*
 	 * Try to determine which PCI configuration mode is implemented.
 	 * Mode2 uses a byte at 0xCF8 and another at 0xCFA; Mode1 uses
@@ -550,7 +551,7 @@ pcicfginit(void)
 	if(pciroot == nil)
 		goto out;
 
-	if(NOBIOS) {
+	if(nobios) {
 		/*
 		 * Work out how big the top bus is
 		 */