let the kernel set dma mode for ata by default

rc/bin/termrc

@@ -9,30 +9,6 @@ mntgen -s slashn && chmod 666 /srv/slashn
 for(i in f t m v L P u U '$' Σ κ)
 	/bin/bind -a '#'^$i /dev >/dev/null >[2=1]
 
-fn ask {
-	if(~ $"$1 ask){
-		echo -n $1
-		echo -n $2
-		echo -n ' ['
-		echo -n $3
-		echo -n '] '
-		$1=`{read}
-		if(~ $"$1 '!rc'){
-			rc -i
-			$1=ask
-		}
-		if(~ $#$1 0)
-			$1=$3
-		ask $*
-	}
-}
-
-ask dmamode ' is (on, off)' on
-if(~ $"dmamode on off){
-	for(c in `{ls /dev/sd*/ctl >[2]/dev/null})
-		echo dma $dmamode >$c
-}
-
 # set up any partitions
 diskparts
 
@@ -91,6 +67,24 @@ if(! ~ $terminal *vx32*){
 			aux/vmware
 }
 
+fn ask {
+	if(~ $"$1 ask){
+		echo -n $1
+		echo -n $2
+		echo -n ' ['
+		echo -n $3
+		echo -n '] '
+		$1=`{read}
+		if(~ $"$1 '!rc'){
+			rc -i
+			$1=ask
+		}
+		if(~ $#$1 0)
+			$1=$3
+		ask $*
+	}
+}
+
 ask vgasize ' is (text, 640x480x8, 1024x768x16, ...)' 1024x768x16
 if(! ~ $"vgasize '' text none){
 	ask monitor ' is (vesa, xga, lcd, ...)' vesa

sys/lib/dist/pc/plan9.ini.cd

@@ -2,17 +2,11 @@
 # very cautious settings to get started.
 # will defeat booting from usb devices.
 *nomp=1
-# *noahciload=1
-# *debugload=1
 *nodumpstack=1
-# this would disable ether and usb probing.
-# *nousbprobe=1
-# *noetherprobe=1
 partition=new
 mouseport=ask
 monitor=ask
 vgasize=ask
-dmamode=ask
 adisk=/dev/sdD0/data
 cdboot=yes
 # console=0

sys/src/9/pc/sdata.c

@@ -570,7 +570,8 @@ atadmamode(Drive* drive)
 		if(drive->dma)
 			drive->dma |= 'U'<<16;
 	}
-
+	if(!getconf("*nodma"))
+		drive->dmactl = drive->dma;
 	return dma;
 }
 

sys/src/boot/pc/mkfile

@@ -54,17 +54,11 @@ $BIN/%:	%
 test.iso: 9bootiso
 	rm -fr tmp $target
 	mkdir tmp
-	touch tmp/foo
-	touch tmp/bar
-	touch tmp/baz
-	touch tmp/386aaa
 	mkdir tmp/386
-	cp 386/9bootiso tmp/386
-	cp /386/9pc tmp/386
-	cp /386/9pcload tmp/386
-	cp /386/9pcf tmp/386
+	cp 9bootiso tmp/386
+	cp /386/9pccd tmp/386
 	mkdir tmp/cfg
-	echo 'bootfile=/386/9pc' >tmp/cfg/plan9.ini
+	echo 'bootfile=/386/9pccd' >tmp/cfg/plan9.ini
 	disk/mk9660 -B 386/9bootiso -p /sys/lib/sysconfig/proto/allproto -s tmp $target
 	rm -fr tmp