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Be careful to maintain the bits in SBLKCTL that are reserved.

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This commit is contained in:
Justin T. Gibbs 1995-03-07 09:00:44 +00:00
parent 7896fbec24
commit 06f0e1ceb8
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=6940
2 changed files with 10 additions and 12 deletions
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11
sys/dev/aic7xxx/aic7xxx.seq
View File

@ -21,7 +21,7 @@
# FreeBSD, Twin, Wide, 2 command per target support, tagged queuing and other
# optimizations provided by Justin T. Gibbs (gibbs@FreeBSD.org)
#
# $Id: aic7xxx.seq,v 1.7 1995/02/03 17:18:44 gibbs Exp $
# $Id: aic7xxx.seq,v 1.8 1995/02/22 01:37:52 gibbs Exp $
VERSION AIC7XXX_SEQ_VERSION 1.8
@ -190,7 +190,6 @@ SCBCOUNT = 0x52 # the actual number of SCBs
FLAGS = 0x53 # Device configuration flags
TWIN_BUS = 0x01
WIDE_BUS = 0x02
SELECTED_SCB = 0x08
SENSE = 0x10
ACTIVE_MSG = 0x20
IDENTIFY_SEEN = 0x40
@ -302,10 +301,10 @@ test_a:
start_scb:
or SCBARRAY+0,NEEDDMA
and SINDEX,0x08,SCBARRAY+1
and A,WIDE_BUS,FLAGS # Wide bus?
or SINDEX,A
mov SBLKCTL,SINDEX # select channel, bus width
and SINDEX,0xf7,SBLKCTL #Clear the channel select bit
and A,0x08,SCBARRAY+1 #Get new channel bit
or SINDEX,A
mov SBLKCTL,SINDEX # select channel
mov SCBARRAY+1 call initialize
clr SG_NOLOAD
and FLAGS,0x3f # !RESELECTING

11
sys/gnu/misc/aic7xxx/aic7xxx.seq
View File

@ -21,7 +21,7 @@
# FreeBSD, Twin, Wide, 2 command per target support, tagged queuing and other
# optimizations provided by Justin T. Gibbs (gibbs@FreeBSD.org)
#
# $Id: aic7xxx.seq,v 1.7 1995/02/03 17:18:44 gibbs Exp $
# $Id: aic7xxx.seq,v 1.8 1995/02/22 01:37:52 gibbs Exp $
VERSION AIC7XXX_SEQ_VERSION 1.8
@ -190,7 +190,6 @@ SCBCOUNT = 0x52 # the actual number of SCBs
FLAGS = 0x53 # Device configuration flags
TWIN_BUS = 0x01
WIDE_BUS = 0x02
SELECTED_SCB = 0x08
SENSE = 0x10
ACTIVE_MSG = 0x20
IDENTIFY_SEEN = 0x40
@ -302,10 +301,10 @@ test_a:
start_scb:
or SCBARRAY+0,NEEDDMA
and SINDEX,0x08,SCBARRAY+1
and A,WIDE_BUS,FLAGS # Wide bus?
or SINDEX,A
mov SBLKCTL,SINDEX # select channel, bus width
and SINDEX,0xf7,SBLKCTL #Clear the channel select bit
and A,0x08,SCBARRAY+1 #Get new channel bit
or SINDEX,A
mov SBLKCTL,SINDEX # select channel
mov SCBARRAY+1 call initialize
clr SG_NOLOAD
and FLAGS,0x3f # !RESELECTING