diff options
Diffstat (limited to 'sys/dev/aic7xxx/aic7xxx.seq')
| -rw-r--r-- | sys/dev/aic7xxx/aic7xxx.seq | 60 |
1 files changed, 19 insertions, 41 deletions
diff --git a/sys/dev/aic7xxx/aic7xxx.seq b/sys/dev/aic7xxx/aic7xxx.seq index 1bae18c..0a64425 100644 --- a/sys/dev/aic7xxx/aic7xxx.seq +++ b/sys/dev/aic7xxx/aic7xxx.seq @@ -37,7 +37,7 @@ *OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF *SUCH DAMAGE. * - * $Id: aic7xxx.seq,v 1.70 1997/04/10 19:13:05 gibbs Exp $ + * $Id: aic7xxx.seq,v 1.71 1997/04/14 02:26:59 gibbs Exp $ * *-M************************************************************************/ @@ -71,8 +71,6 @@ reset: /* Always allow reselection */ mvi SCSISEQ, ENRSELI|ENAUTOATNP; call clear_target_state; -repoll_for_work: - and SIMODE1, ~ENBUSFREE; poll_for_work: test SSTAT0,SELDO jnz select; test SSTAT0,SELDI jnz reselect; @@ -163,12 +161,13 @@ paged_busy_link: call add_scb_to_disc_list; mvi SEQCTL, FASTMODE; jmp poll_for_work; -.endif +.else simple_busy_link: mov SCBPTR, ARG_1; mov SCB_LINKED_NEXT, CUR_SCBID; mvi SEQCTL, FASTMODE; jmp poll_for_work; +.endif make_busy: mov DINDIR, CUR_SCBID; mov SCBPTR, SAVED_SCBPTR; @@ -209,14 +208,6 @@ initialize_scsiid: */ reselect: clr MSG_LEN; /* Don't have anything in the mesg buffer */ - mvi CLRSINT1,CLRBUSFREE; - or SIMODE1, ENBUSFREE; /* - * We aren't expecting a - * bus free, so interrupt - * the kernel driver if it - * happens. - */ - test SSTAT0, SELDI jz repoll_for_work;/* False alarm? */ mvi CLRSINT0, CLRSELDI; /* XXX test for and handle ONE BIT condition */ and SAVED_TCL, SELID_MASK, SELID; @@ -230,25 +221,14 @@ reselect: * SCB is used, so don't bother with it now. */ select: - mov SCBPTR, WAITING_SCBH; - mvi CLRSINT1,CLRBUSFREE; + /* Turn off the selection hardware */ mvi SCSISEQ, ENRSELI|ENAUTOATNP; /* * ATN on parity errors * for "in" phases */ - or SIMODE1, ENBUSFREE; /* - * We aren't expecting a - * bus free, so interrupt - * the kernel driver if it - * happens. - */ - test SSTAT0, SELDO jnz select_good; - mvi SCSISEQ, ENSELO|ENAUTOATNO|ENRSELI|ENAUTOATNP; - jmp repoll_for_work; -select_good: - mov WAITING_SCBH,SCB_NEXT; - /* Turn off the selection hardware */ mvi CLRSINT0, CLRSELDO; + mov SCBPTR, WAITING_SCBH; + mov WAITING_SCBH,SCB_NEXT; mov SAVED_TCL, SCB_TCL; /* * As soon as we get a successful selection, the target should go @@ -285,6 +265,13 @@ mk_message: mvi INTSTAT,AWAITING_MSG; select2: + mvi CLRSINT1,CLRBUSFREE; + or SIMODE1, ENBUSFREE; /* + * We aren't expecting a + * bus free, so interrupt + * the kernel driver if it + * happens. + */ /* * Initialize Ultra mode setting and clear the SCSI channel. */ @@ -557,14 +544,14 @@ p_mesgout_loop: test SSTAT1, SCSIPERR jnz p_mesgout_loop; and LASTPHASE, PHASE_MASK, SCSISIGI; cmp LASTPHASE, P_MESGOUT jne p_mesgout_done; -/* - * If the next bus phase after ATN drops is a message out, it means - * that the target is requesting that the last message(s) be resent. - */ p_mesgout_testretry: test DINDEX,0xff jnz p_mesgout_dropatn; or SCSISIGO,ATNO,LASTPHASE;/* turn on ATN for the retry */ jmp p_mesgout_start; +/* + * If the next bus phase after ATN drops is a message out, it means + * that the target is requesting that the last message(s) be resent. + */ p_mesgout_dropatn: cmp DINDEX,1 jne p_mesgout_outb; /* last byte? */ mvi CLRSINT1,CLRATNO; /* drop ATN */ @@ -670,6 +657,7 @@ dma_next_scb: /* Only DMA on top of ourselves if we are the SCB to download */ mov A, SCB_LINKED_NEXT; cmp SCB_TAG, A je dma_next_scb2; + call add_scb_to_free_list; mov SCBPTR, A; jmp add_to_waiting_list; .endif @@ -835,17 +823,7 @@ setup_SCB: not_found: mvi INTSTAT, NO_MATCH; -send_abort_msg: - test SEQ_FLAGS, TAGGED_SCB jnz send_abort_tag_msg; - mvi MSG_ABORT call mk_mesg; - jmp send_abort_done; -send_abort_tag_msg: - mvi MSG_ABORT_TAG call mk_mesg; /* ABORT TAG message */ -send_abort_done: - /* If we don't have the tag ID yet, we're "looking ahead" at state - * that hasn't been processed, so don't ack. - */ - cmp ARG_1, SCB_LIST_NULL je ITloop; + mvi MSG_BUS_DEV_RESET call mk_mesg; jmp mesgin_done; /* |
