53c7xx_d.h_shipped

来自「Linux Kernel 2.6.9 for OMAP1710」· H_SHIPPED 代码 · 共 2,875 行 · 第 1/5 页

; Calculate the address of the next pointer within the DSA 
; structure of the command that is currently disconnecting
;

    ; Read what should be the current DSA from memory - actual DSA
    ; register is probably corrupt
    MOVE MEMORY 4, saved_dsa, addr_scratch

at 0x0000005e : */	0xc0000004,0x00000000,0x00000000,
/*



    MOVE SCRATCH0 + dsa_next TO SCRATCH0

at 0x00000061 : */	0x7e343000,0x00000000,
/*
    MOVE SCRATCH1 + 0 TO SCRATCH1 WITH CARRY

at 0x00000063 : */	0x7f350000,0x00000000,
/*
    MOVE SCRATCH2 + 0 TO SCRATCH2 WITH CARRY

at 0x00000065 : */	0x7f360000,0x00000000,
/*
    MOVE SCRATCH3 + 0 TO SCRATCH3 WITH CARRY

at 0x00000067 : */	0x7f370000,0x00000000,
/*

; Point the next field of this DSA structure at the current disconnected 
; list
    
    MOVE MEMORY 4, addr_scratch, dsa_schedule_insert + 8

at 0x00000069 : */	0xc0000004,0x00000000,0x000001b8,
/*
    
dsa_schedule_insert:
    MOVE MEMORY 4, reconnect_dsa_head, 0 

at 0x0000006c : */	0xc0000004,0x00000000,0x00000000,
/*

; And update the head pointer.

    ; Read what should be the current DSA from memory - actual DSA
    ; register is probably corrupt
    MOVE MEMORY 4, saved_dsa, addr_scratch

at 0x0000006f : */	0xc0000004,0x00000000,0x00000000,
/*



    
    MOVE MEMORY 4, addr_scratch, reconnect_dsa_head

at 0x00000072 : */	0xc0000004,0x00000000,0x00000000,
/*
    





    CLEAR ACK

at 0x00000075 : */	0x60000040,0x00000000,
/*


    ; Time to correct DSA following memory move
    MOVE MEMORY 4, saved_dsa, addr_dsa

at 0x00000077 : */	0xc0000004,0x00000000,0x00000000,
/*

    WAIT DISCONNECT

at 0x0000007a : */	0x48000000,0x00000000,
/*






    JUMP schedule

at 0x0000007c : */	0x80080000,0x00000000,
/*


;
; select
;
; PURPOSE : establish a nexus for the SCSI command referenced by DSA.
;	On success, the current DSA structure is removed from the issue 
;	queue.  Usually, this is entered as a fall-through from schedule,
;	although the contingent allegiance handling code will write
;	the select entry address to the DSP to restart a command as a 
;	REQUEST SENSE.  A message is sent (usually IDENTIFY, although
;	additional SDTR or WDTR messages may be sent).  COMMAND OUT
;	is handled.
;
; INPUTS : DSA - SCSI command, issue_dsa_head
;
; CALLS : NOT OK
;
; MODIFIES : SCRATCH, issue_dsa_head
;
; EXITS : on reselection or selection, go to select_failed
;	otherwise, RETURN so control is passed back to 
;	dsa_begin.
;

ENTRY select
select:








    CLEAR TARGET

at 0x0000007e : */	0x60000200,0x00000000,
/*

; XXX
;
; In effect, SELECTION operations are backgrounded, with execution
; continuing until code which waits for REQ or a fatal interrupt is 
; encountered.
;
; So, for more performance, we could overlap the code which removes 
; the command from the NCRs issue queue with the selection, but 
; at this point I don't want to deal with the error recovery.
;



    ; Enable selection timer



    MOVE CTEST7 & 0xef TO CTEST7

at 0x00000080 : */	0x7c1bef00,0x00000000,
/*


    SELECT ATN FROM dsa_select, select_failed

at 0x00000082 : */	0x4300003c,0x00000828,
/*
    JUMP select_msgout, WHEN MSG_OUT

at 0x00000084 : */	0x860b0000,0x00000218,
/*
ENTRY select_msgout
select_msgout:

    ; Disable selection timer
    MOVE CTEST7 | 0x10 TO CTEST7

at 0x00000086 : */	0x7a1b1000,0x00000000,
/*

    MOVE FROM dsa_msgout, WHEN MSG_OUT

at 0x00000088 : */	0x1e000000,0x00000040,
/*










   RETURN

at 0x0000008a : */	0x90080000,0x00000000,
/*

; 
; select_done
; 
; PURPOSE: continue on to normal data transfer; called as the exit 
;	point from dsa_begin.
;
; INPUTS: dsa
;
; CALLS: OK
;
;

select_done:

; NOTE DSA is corrupt when we arrive here!
    MOVE MEMORY 4, saved_dsa, addr_dsa

at 0x0000008c : */	0xc0000004,0x00000000,0x00000000,
/*








; After a successful selection, we should get either a CMD phase or 
; some transfer request negotiation message.

    JUMP cmdout, WHEN CMD

at 0x0000008f : */	0x820b0000,0x0000025c,
/*
    INT int_err_unexpected_phase, WHEN NOT MSG_IN 

at 0x00000091 : */	0x9f030000,0x00000000,
/*

select_msg_in:
    CALL msg_in, WHEN MSG_IN

at 0x00000093 : */	0x8f0b0000,0x0000041c,
/*
    JUMP select_msg_in, WHEN MSG_IN

at 0x00000095 : */	0x870b0000,0x0000024c,
/*

cmdout:
    INT int_err_unexpected_phase, WHEN NOT CMD

at 0x00000097 : */	0x9a030000,0x00000000,
/*



ENTRY cmdout_cmdout
cmdout_cmdout:

    MOVE FROM dsa_cmdout, WHEN CMD

at 0x00000099 : */	0x1a000000,0x00000048,
/*




;
; data_transfer  
; other_out
; other_in
; other_transfer
;
; PURPOSE : handle the main data transfer for a SCSI command in 
;	several parts.  In the first part, data_transfer, DATA_IN
;	and DATA_OUT phases are allowed, with the user provided
;	code (usually dynamically generated based on the scatter/gather
;	list associated with a SCSI command) called to handle these 
;	phases.
;
;	After control has passed to one of the user provided 
;	DATA_IN or DATA_OUT routines, back calls are made to 
;	other_transfer_in or other_transfer_out to handle non-DATA IN
;	and DATA OUT phases respectively, with the state of the active
;	data pointer being preserved in TEMP.
;
;	On completion, the user code passes control to other_transfer
;	which causes DATA_IN and DATA_OUT to result in unexpected_phase
;	interrupts so that data overruns may be trapped.
;
; INPUTS : DSA - SCSI command
;
; CALLS : OK in data_transfer_start, not ok in other_out and other_in, ok in
;	other_transfer
;
; MODIFIES : SCRATCH
;
; EXITS : if STATUS IN is detected, signifying command completion,
;	the NCR jumps to command_complete.  If MSG IN occurs, a 
;	CALL is made to msg_in.  Otherwise, other_transfer runs in 
;	an infinite loop.
;	

ENTRY data_transfer
data_transfer:
    JUMP cmdout_cmdout, WHEN CMD

at 0x0000009b : */	0x820b0000,0x00000264,
/*
    CALL msg_in, WHEN MSG_IN

at 0x0000009d : */	0x8f0b0000,0x0000041c,
/*
    INT int_err_unexpected_phase, WHEN MSG_OUT

at 0x0000009f : */	0x9e0b0000,0x00000000,
/*
    JUMP do_dataout, WHEN DATA_OUT

at 0x000000a1 : */	0x800b0000,0x000002a4,
/*
    JUMP do_datain, WHEN DATA_IN

at 0x000000a3 : */	0x810b0000,0x000002fc,
/*
    JUMP command_complete, WHEN STATUS

at 0x000000a5 : */	0x830b0000,0x0000065c,
/*
    JUMP data_transfer

at 0x000000a7 : */	0x80080000,0x0000026c,
/*
ENTRY end_data_transfer
end_data_transfer:

;
; FIXME: On NCR53c700 and NCR53c700-66 chips, do_dataout/do_datain 
; should be fixed up whenever the nexus changes so it can point to the 
; correct routine for that command.
;


; Nasty jump to dsa->dataout
do_dataout:

    MOVE MEMORY 4, saved_dsa, addr_scratch

at 0x000000a9 : */	0xc0000004,0x00000000,0x00000000,
/*



    MOVE SCRATCH0 + dsa_dataout TO SCRATCH0	

at 0x000000ac : */	0x7e345000,0x00000000,
/*
    MOVE SCRATCH1 + 0 TO SCRATCH1 WITH CARRY 

at 0x000000ae : */	0x7f350000,0x00000000,
/*
    MOVE SCRATCH2 + 0 TO SCRATCH2 WITH CARRY 

at 0x000000b0 : */	0x7f360000,0x00000000,
/*
    MOVE SCRATCH3 + 0 TO SCRATCH3 WITH CARRY 

at 0x000000b2 : */	0x7f370000,0x00000000,
/*
    
    MOVE MEMORY 4, addr_scratch, dataout_to_jump + 4

at 0x000000b4 : */	0xc0000004,0x00000000,0x000002e0,
/*
    
dataout_to_jump:
    MOVE MEMORY 4, 0, dataout_jump + 4 

at 0x000000b7 : */	0xc0000004,0x00000000,0x000002f8,
/*

    ; Time to correct DSA following memory move
    MOVE MEMORY 4, saved_dsa, addr_dsa

at 0x000000ba : */	0xc0000004,0x00000000,0x00000000,
/*

dataout_jump:
    JUMP 0

at 0x000000bd : */	0x80080000,0x00000000,
/*

; Nasty jump to dsa->dsain
do_datain:

    MOVE MEMORY 4, saved_dsa, addr_scratch

at 0x000000bf : */	0xc0000004,0x00000000,0x00000000,
/*



    MOVE SCRATCH0 + dsa_datain TO SCRATCH0	

at 0x000000c2 : */	0x7e345400,0x00000000,
/*
    MOVE SCRATCH1 + 0 TO SCRATCH1 WITH CARRY 

at 0x000000c4 : */	0x7f350000,0x00000000,
/*
    MOVE SCRATCH2 + 0 TO SCRATCH2 WITH CARRY 

at 0x000000c6 : */	0x7f360000,0x00000000,
/*
    MOVE SCRATCH3 + 0 TO SCRATCH3 WITH CARRY 

at 0x000000c8 : */	0x7f370000,0x00000000,
/*
    
    MOVE MEMORY 4, addr_scratch, datain_to_jump + 4

at 0x000000ca : */	0xc0000004,0x00000000,0x00000338,
/*
    
ENTRY datain_to_jump
datain_to_jump:
    MOVE MEMORY 4, 0, datain_jump + 4

at 0x000000cd : */	0xc0000004,0x00000000,0x00000350,
/*

    ; Time to correct DSA following memory move
    MOVE MEMORY 4, saved_dsa, addr_dsa

at 0x000000d0 : */	0xc0000004,0x00000000,0x00000000,
/*




datain_jump:
    JUMP 0

at 0x000000d3 : */	0x80080000,0x00000000,
/*



; Note that other_out and other_in loop until a non-data phase
; is discovered, so we only execute return statements when we
; can go on to the next data phase block move statement.

ENTRY other_out
other_out:



    INT int_err_unexpected_phase, WHEN CMD

at 0x000000d5 : */	0x9a0b0000,0x00000000,
/*
    JUMP msg_in_restart, WHEN MSG_IN 

at 0x000000d7 : */	0x870b0000,0x000003fc,
/*
    INT int_err_unexpected_phase, WHEN MSG_OUT

at 0x000000d9 : */	0x9e0b0000,0x00000000,
/*
    INT int_err_unexpected_phase, WHEN DATA_IN

at 0x000000db : */	0x990b0000,0x00000000,
/*
    JUMP command_complete, WHEN STATUS

at 0x000000dd : */	0x830b0000,0x0000065c,
/*
    JUMP other_out, WHEN NOT DATA_OUT

at 0x000000df : */	0x80030000,0x00000354,
/*

; TEMP should be OK, as we got here from a call in the user dataout code.

    RETURN

at 0x000000e1 : */	0x90080000,0x00000000,
/*

ENTRY other_in
other_in:



    INT int_err_unexpected_phase, WHEN CMD

at 0x000000e3 : */	0x9a0b0000,0x00000000,
/*
    JUMP msg_in_restart, WHEN MSG_IN 

at 0x000000e5 : */	0x870b0000,0x000003fc,
/*
    INT int_err_unexpected_phase, WHEN MSG_OUT

at 0x000000e7 : */	0x9e0b0000,0x00000000,
/*
    INT int_err_unexpected_phase, WHEN DATA_OUT

at 0x000000e9 : */	0x980b0000,0x00000000,
/*
    JUMP command_complete, WHEN STATUS

at 0x000000eb : */	0x830b0000,0x0000065c,
/*
    JUMP other_in, WHEN NOT DATA_IN

at 0x000000ed : */	0x81030000,0x0000038c,
/*

; TEMP should be OK, as we got here from a call in the user datain code.

    RETURN

at 0x000000ef : */	0x90080000,0x00000000,
/*


ENTRY other_transfer
other_transfer:
    INT int_err_unexpected_phase, WHEN CMD

at 0x000000f1 : */	0x9a0b0000,0x00000000,
/*
    CALL msg_in, WHEN MSG_IN

at 0x000000f3 : */	0x8f0b0000,0x0000041c,
/*
    INT int_err_unexpected_phase, WHEN MSG_OUT

at 0x000000f5 : */	0x9e0b0000,0x00000000,
/*
    INT int_err_unexpected_phase, WHEN DATA_OUT

at 0x000000f7 : */	0x980b0000,0x00000000,
/*
    INT int_err_unexpected_phase, WHEN DATA_IN

at 0x000000f9 : */	0x990b0000,0x00000000,
/*
    JUMP command_complete, WHEN STATUS

at 0x000000fb : */	0x830b0000,0x0000065c,
/*
    JUMP other_transfer

at 0x000000fd : */	0x80080000,0x000003c4,
/*

;
; msg_in_restart
; msg_in
; munge_msg
;
; PURPOSE : process messages from a target.  msg_in is called when the 
;	caller hasn't read the first byte of the message.  munge_message
;	is called when the caller has read the first byte of the message,
;	and left it in SFBR.  msg_in_restart is called when the caller 
;	hasn't read the first byte of the message, and wishes RETURN
;	to transfer control back to the address of the conditional
;	CALL instruction rather than to the instruction after it.
;
;	Various int_* interrupts are generated when the host system
;	needs to intervene, as is the case with SDTR, WDTR, and
;	INITIATE RECOVERY messages.
;
;	When the host system handles one of these interrupts,
;	it can respond by reentering at reject_message, 
;	which rejects the message and returns control to
;	the caller of msg_in or munge_msg, accept_message
;	which clears ACK and returns control, or reply_message
;	which sends the message pointed to by the DSA 
;	msgout_other table indirect field.