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Handle reselect entirely in script; for this provide a script area, 

modified by the driver, which will load the appropriate DSA for a given
target/lun.
This commit is contained in:
bouyer 2000-10-06 16:31:17 +00:00
parent 533e348801
commit c67eef4e7d
1 changed files with 47 additions and 3 deletions
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50
sys/dev/microcode/siop/siop.ss
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@ -1,4 +1,4 @@
; $NetBSD: siop.ss,v 1.7 2000/06/13 13:59:15 bouyer Exp $
; $NetBSD: siop.ss,v 1.8 2000/10/06 16:31:17 bouyer Exp $
;
; Copyright (c) 2000 Manuel Bouyer.
@ -87,6 +87,18 @@ EXTERN slot_abs_selected;
EXTERN endslot_abs_reselect;
EXTERN abs_find_dsa;
ENTRY rtarget;
ENTRY rlun;
ENTRY rdsa0;
ENTRY rdsa1;
ENTRY rdsa2;
ENTRY rdsa3;
ENTRY rsxfer;
ENTRY rscntl3;
ENTRY res_nextld;
EXTERN resel_abs_selected;
PROC siop_script:
selected:
@ -110,8 +122,8 @@ reselect:
MOVE SFBR to SCRATCHA0 ; save reselect ID
INT int_err, WHEN NOT MSG_IN;
MOVE FROM t_msg_in, WHEN MSG_IN;
INT int_resel;
MOVE SFBR & 0x07 to SCRATCHA2; save LUN
JUMP abs_find_dsa;
reselect_fail:
; check that host asserted SIGP, this'll clear SIGP in ISTAT
MOVE CTEST2 & 0x40 TO SFBR;
@ -261,3 +273,35 @@ nextslot: NOP; /* will be changed to the next slot entry
PROC endslot_script:
JUMP endslot_abs_reselect;
;; script used to find the DSA after a reselect.
;; each slot contain a target/lun identifier (when free target = 0xff, so it's
;; ignored) used to load the appropriate DSA for this reselect
PROC reselected_script:
MOVE SCRATCHA0 to SFBR; load ID
rtarget:
JUMP REL(res_nextid), IF NOT 0xff;
MOVE SCRATCHA2 to SFBR; load LUN
rlun:
JUMP REL(res_nextld), IF NOT 0xff;
rdsa0:
MOVE 0x00 to dsa0;
rdsa1:
MOVE 0x01 to dsa1;
rdsa2:
MOVE 0x02 to dsa2;
rdsa3:
MOVE 0x03 to dsa3;
; the select is here to reload sxfer and scntl3 from the table. As we're
; already reselected is always fais, and always jumps to the main script.
SELECT FROM t_id, resel_abs_selected;
res_nextld:
NOP ; MOVE SCRATCHA0 to SFBR
res_nextid:
NOP ; JUMP REL(res_nextid), IF NOT 0xff
PROC reselected_end_script:
INT int_resel;
INT int_resel; /* need two because res_nextld and res_nextid */