diff options
Diffstat (limited to 'sys/dev/aic7xxx/aic7xxx.seq')
| -rw-r--r-- | sys/dev/aic7xxx/aic7xxx.seq | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/sys/dev/aic7xxx/aic7xxx.seq b/sys/dev/aic7xxx/aic7xxx.seq index e8cc5bb..3338c1c 100644 --- a/sys/dev/aic7xxx/aic7xxx.seq +++ b/sys/dev/aic7xxx/aic7xxx.seq @@ -41,7 +41,7 @@ # ##-M######################################################################### -VERSION AIC7XXX_SEQ_VER "$Id: aic7xxx.seq,v 1.15 1995/04/27 17:44:27 gibbs Exp $" +VERSION AIC7XXX_SEQ_VER "$Id: aic7xxx.seq,v 1.16 1995/05/17 07:05:49 davidg Exp $" SCBMASK = 0x1f @@ -252,8 +252,8 @@ SAVED_TCL = 0x56 # Temporary storage for the # ram since a reconnecting target can request sense and this will create # yet another SCB waiting for selection. The solution used here is to # use byte 31 of the SCB as a psuedo-next pointer and to thread a list -# of SCBs that are awaiting selection. Since 0 is a valid SCB offset, -# SCB_LIST_NULL is 0x10 which is out of range. The kernel driver must +# of SCBs that are awaiting selection. Since 0-0xfe are valid SCB offsets, +# SCB_LIST_NULL is 0xff which is out of range. The kernel driver must # add an entry to this list everytime a request sense occurs. The sequencer # will automatically consume the entries. @@ -261,14 +261,14 @@ WAITING_SCBH = 0x57 # head of list of SCBs awaiting # selection WAITING_SCBT = 0x58 # tail of list of SCBs awaiting # selection -SCB_LIST_NULL = 0x10 +SCB_LIST_NULL = 0xff # Poll QINCNT for work - the lower bits contain # the number of entries in the Queue In FIFO. # start: - test WAITING_SCBH,SCB_LIST_NULL jz start_waiting + cmp WAITING_SCBH,SCB_LIST_NULL jne start_waiting poll_for_work: test FLAGS,TWIN_BUS jz start2 # Are we a twin channel device? # For fairness, we check the other bus first, since we just finished a @@ -280,7 +280,7 @@ poll_for_work: start2: test SSTAT0,SELDI jnz reselect test SSTAT0,SELDO jnz select - test WAITING_SCBH,SCB_LIST_NULL jz start_waiting + cmp WAITING_SCBH,SCB_LIST_NULL jne start_waiting test QINCNT,SCBMASK jz poll_for_work # We have at least one queued SCB now and we don't have any @@ -328,12 +328,12 @@ test SCBARRAY+0,NEEDDMA jz test_busy # initialization, board reset, and a target's SELTO. test_busy: - test SCBARRAY+0,0x20 jnz start_scb and FUNCTION1,0x70,SCBARRAY+1 mov A,FUNCTION1 test SCBARRAY+1,0x88 jz test_a # Id < 8 && A channel test ACTIVE_B,A jnz requeue + test SCBARRAY+0,0x20 jnz start_scb or ACTIVE_B,A # Mark the current target as busy jmp start_scb @@ -349,6 +349,7 @@ start_waiting: test_a: test ACTIVE_A,A jnz requeue + test SCBARRAY+0,0x20 jnz start_scb or ACTIVE_A,A # Mark the current target as busy start_scb: |
