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2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 | u32 SCRIPT[] = { /* ; NCR 53c810 driver, main script ; Sponsored by ; iX Multiuser Multitasking Magazine ; hm@ix.de ; ; Copyright 1993, 1994, 1995 Drew Eckhardt ; Visionary Computing ; (Unix and Linux consulting and custom programming) ; drew@PoohSticks.ORG ; +1 (303) 786-7975 ; ; TolerANT and SCSI SCRIPTS are registered trademarks of NCR Corporation. ; ; PRE-ALPHA ; ; For more information, please consult ; ; NCR 53C810 ; PCI-SCSI I/O Processor ; Data Manual ; ; NCR 53C710 ; SCSI I/O Processor ; Programmers Guide ; ; NCR Microelectronics ; 1635 Aeroplaza Drive ; Colorado Springs, CO 80916 ; 1+ (719) 578-3400 ; ; Toll free literature number ; +1 (800) 334-5454 ; ; IMPORTANT : This code is self modifying due to the limitations of ; the NCR53c7,8xx series chips. Persons debugging this code with ; the remote debugger should take this into account, and NOT set ; breakpoints in modified instructions. ; ; Design: ; The NCR53c7,8xx family of SCSI chips are busmasters with an onboard ; microcontroller using a simple instruction set. ; ; So, to minimize the effects of interrupt latency, and to maximize ; throughput, this driver offloads the practical maximum amount ; of processing to the SCSI chip while still maintaining a common ; structure. ; ; Where tradeoffs were needed between efficiency on the older ; chips and the newer NCR53c800 series, the NCR53c800 series ; was chosen. ; ; While the NCR53c700 and NCR53c700-66 lacked the facilities to fully ; automate SCSI transfers without host processor intervention, this ; isn't the case with the NCR53c710 and newer chips which allow ; ; - reads and writes to the internal registers from within the SCSI ; scripts, allowing the SCSI SCRIPTS(tm) code to save processor ; state so that multiple threads of execution are possible, and also ; provide an ALU for loop control, etc. ; ; - table indirect addressing for some instructions. This allows ; pointers to be located relative to the DSA ((Data Structure ; Address) register. ; ; These features make it possible to implement a mailbox style interface, ; where the same piece of code is run to handle I/O for multiple threads ; at once minimizing our need to relocate code. Since the NCR53c700/ ; NCR53c800 series have a unique combination of features, making a ; a standard ingoing/outgoing mailbox system, costly, I've modified it. ; ; - Mailboxes are a mixture of code and data. This lets us greatly ; simplify the NCR53c810 code and do things that would otherwise ; not be possible. ; ; The saved data pointer is now implemented as follows : ; ; Control flow has been architected such that if control reaches ; munge_save_data_pointer, on a restore pointers message or ; reconnection, a jump to the address formerly in the TEMP register ; will allow the SCSI command to resume execution. ; ; ; Note : the DSA structures must be aligned on 32 bit boundaries, ; since the source and destination of MOVE MEMORY instructions ; must share the same alignment and this is the alignment of the ; NCR registers. ; ABSOLUTE dsa_temp_lun = 0 ; Patch to lun for current dsa ABSOLUTE dsa_temp_next = 0 ; Patch to dsa next for current dsa ABSOLUTE dsa_temp_addr_next = 0 ; Patch to address of dsa next address ; for current dsa ABSOLUTE dsa_temp_sync = 0 ; Patch to address of per-target ; sync routine ABSOLUTE dsa_temp_target = 0 ; Patch to id for current dsa ABSOLUTE dsa_temp_addr_saved_pointer = 0; Patch to address of per-command ; saved data pointer ABSOLUTE dsa_temp_addr_residual = 0 ; Patch to address of per-command ; current residual code ABSOLUTE dsa_temp_addr_saved_residual = 0; Patch to address of per-command ; saved residual code ABSOLUTE dsa_temp_addr_new_value = 0 ; Address of value for JUMP operand ABSOLUTE dsa_temp_addr_array_value = 0 ; Address to copy to ABSOLUTE dsa_temp_addr_dsa_value = 0 ; Address of this DSA value ; ; Once a device has initiated reselection, we need to compare it ; against the singly linked list of commands which have disconnected ; and are pending reselection. These commands are maintained in ; an unordered singly linked list of DSA structures, through the ; DSA pointers at their 'centers' headed by the reconnect_dsa_head ; pointer. ; ; To avoid complications in removing commands from the list, ; I minimize the amount of expensive (at eight operations per ; addition @ 500-600ns each) pointer operations which must ; be done in the NCR driver by precomputing them on the ; host processor during dsa structure generation. ; ; The fixed-up per DSA code knows how to recognize the nexus ; associated with the corresponding SCSI command, and modifies ; the source and destination pointers for the MOVE MEMORY ; instruction which is executed when reselected_ok is called ; to remove the command from the list. Similarly, DSA is ; loaded with the address of the next DSA structure and ; reselected_check_next is called if a failure occurs. ; ; Perhaps more conscisely, the net effect of the mess is ; ; for (dsa = reconnect_dsa_head, dest = &reconnect_dsa_head, ; src = NULL; dsa; dest = &dsa->next, dsa = dsa->next) { ; src = &dsa->next; ; if (target_id == dsa->id && target_lun == dsa->lun) { ; *dest = *src; ; break; ; } ; } ; ; if (!dsa) ; error (int_err_unexpected_reselect); ; else ; longjmp (dsa->jump_resume, 0); ; ; ; Define DSA structure used for mailboxes ENTRY dsa_code_template dsa_code_template: ENTRY dsa_code_begin dsa_code_begin: MOVE dmode_memory_to_ncr TO DMODE at 0x00000000 : */ 0x78380000,0x00000000, /* MOVE MEMORY 4, dsa_temp_addr_dsa_value, addr_scratch at 0x00000002 : */ 0xc0000004,0x00000000,0x00000000, /* MOVE dmode_memory_to_memory TO DMODE at 0x00000005 : */ 0x78380000,0x00000000, /* CALL scratch_to_dsa at 0x00000007 : */ 0x88080000,0x00000980, /* CALL select at 0x00000009 : */ 0x88080000,0x000001fc, /* ; Handle the phase mismatch which may have resulted from the ; MOVE FROM dsa_msgout if we returned here. The CLEAR ATN ; may or may not be necessary, and we should update script_asm.pl ; to handle multiple pieces. CLEAR ATN at 0x0000000b : */ 0x60000008,0x00000000, /* CLEAR ACK at 0x0000000d : */ 0x60000040,0x00000000, /* ; Replace second operand with address of JUMP instruction dest operand ; in schedule table for this DSA. Becomes dsa_jump_dest in 53c7,8xx.c. ENTRY dsa_code_fix_jump dsa_code_fix_jump: MOVE MEMORY 4, NOP_insn, 0 at 0x0000000f : */ 0xc0000004,0x00000000,0x00000000, /* JUMP select_done at 0x00000012 : */ 0x80080000,0x00000224, /* ; wrong_dsa loads the DSA register with the value of the dsa_next ; field. ; wrong_dsa: ; Patch the MOVE MEMORY INSTRUCTION such that ; the destination address is the address of the OLD ; next pointer. ; MOVE MEMORY 4, dsa_temp_addr_next, reselected_ok + 8 at 0x00000014 : */ 0xc0000004,0x00000000,0x00000758, /* MOVE dmode_memory_to_ncr TO DMODE at 0x00000017 : */ 0x78380000,0x00000000, /* ; ; Move the _contents_ of the next pointer into the DSA register as ; the next I_T_L or I_T_L_Q tupple to check against the established ; nexus. ; MOVE MEMORY 4, dsa_temp_next, addr_scratch at 0x00000019 : */ 0xc0000004,0x00000000,0x00000000, /* MOVE dmode_memory_to_memory TO DMODE at 0x0000001c : */ 0x78380000,0x00000000, /* CALL scratch_to_dsa at 0x0000001e : */ 0x88080000,0x00000980, /* JUMP reselected_check_next at 0x00000020 : */ 0x80080000,0x000006a4, /* ABSOLUTE dsa_save_data_pointer = 0 ENTRY dsa_code_save_data_pointer dsa_code_save_data_pointer: MOVE dmode_ncr_to_memory TO DMODE at 0x00000022 : */ 0x78380000,0x00000000, /* MOVE MEMORY 4, addr_temp, dsa_temp_addr_saved_pointer at 0x00000024 : */ 0xc0000004,0x00000000,0x00000000, /* MOVE dmode_memory_to_memory TO DMODE at 0x00000027 : */ 0x78380000,0x00000000, /* ; HARD CODED : 24 bytes needs to agree with 53c7,8xx.h MOVE MEMORY 24, dsa_temp_addr_residual, dsa_temp_addr_saved_residual at 0x00000029 : */ 0xc0000018,0x00000000,0x00000000, /* CLEAR ACK at 0x0000002c : */ 0x60000040,0x00000000, /* RETURN at 0x0000002e : */ 0x90080000,0x00000000, /* ABSOLUTE dsa_restore_pointers = 0 ENTRY dsa_code_restore_pointers dsa_code_restore_pointers: MOVE dmode_memory_to_ncr TO DMODE at 0x00000030 : */ 0x78380000,0x00000000, /* MOVE MEMORY 4, dsa_temp_addr_saved_pointer, addr_temp at 0x00000032 : */ 0xc0000004,0x00000000,0x00000000, /* MOVE dmode_memory_to_memory TO DMODE at 0x00000035 : */ 0x78380000,0x00000000, /* ; HARD CODED : 24 bytes needs to agree with 53c7,8xx.h MOVE MEMORY 24, dsa_temp_addr_saved_residual, dsa_temp_addr_residual at 0x00000037 : */ 0xc0000018,0x00000000,0x00000000, /* CLEAR ACK at 0x0000003a : */ 0x60000040,0x00000000, /* RETURN at 0x0000003c : */ 0x90080000,0x00000000, /* ABSOLUTE dsa_check_reselect = 0 ; dsa_check_reselect determines whether or not the current target and ; lun match the current DSA ENTRY dsa_code_check_reselect dsa_code_check_reselect: MOVE SSID TO SFBR ; SSID contains 3 bit target ID at 0x0000003e : */ 0x720a0000,0x00000000, /* ; FIXME : we need to accomodate bit fielded and binary here for '7xx/'8xx chips JUMP REL (wrong_dsa), IF NOT dsa_temp_target, AND MASK 0xf8 at 0x00000040 : */ 0x8084f800,0x00ffff48, /* ; ; Hack - move to scratch first, since SFBR is not writeable ; via the CPU and hence a MOVE MEMORY instruction. ; MOVE dmode_memory_to_ncr TO DMODE at 0x00000042 : */ 0x78380000,0x00000000, /* MOVE MEMORY 1, reselected_identify, addr_scratch at 0x00000044 : */ 0xc0000001,0x00000000,0x00000000, /* MOVE dmode_memory_to_memory TO DMODE at 0x00000047 : */ 0x78380000,0x00000000, /* MOVE SCRATCH0 TO SFBR at 0x00000049 : */ 0x72340000,0x00000000, /* ; FIXME : we need to accomodate bit fielded and binary here for '7xx/'8xx chips JUMP REL (wrong_dsa), IF NOT dsa_temp_lun, AND MASK 0xf8 at 0x0000004b : */ 0x8084f800,0x00ffff1c, /* ; Patch the MOVE MEMORY INSTRUCTION such that ; the source address is the address of this dsa's ; next pointer. MOVE MEMORY 4, dsa_temp_addr_next, reselected_ok + 4 at 0x0000004d : */ 0xc0000004,0x00000000,0x00000754, /* CALL reselected_ok at 0x00000050 : */ 0x88080000,0x00000750, /* CALL dsa_temp_sync at 0x00000052 : */ 0x88080000,0x00000000, /* ; Release ACK on the IDENTIFY message _after_ we've set the synchronous ; transfer parameters! CLEAR ACK at 0x00000054 : */ 0x60000040,0x00000000, /* ; Implicitly restore pointers on reselection, so a RETURN ; will transfer control back to the right spot. CALL REL (dsa_code_restore_pointers) at 0x00000056 : */ 0x88880000,0x00ffff60, /* RETURN at 0x00000058 : */ 0x90080000,0x00000000, /* ENTRY dsa_zero dsa_zero: ENTRY dsa_code_template_end dsa_code_template_end: ; Perform sanity check for dsa_fields_start == dsa_code_template_end - ; dsa_zero, puke. ABSOLUTE dsa_fields_start = 0 ; Sanity marker ; pad 48 bytes (fix this RSN) ABSOLUTE dsa_next = 48 ; len 4 Next DSA ; del 4 Previous DSA address ABSOLUTE dsa_cmnd = 56 ; len 4 Scsi_Cmnd * for this thread. ABSOLUTE dsa_select = 60 ; len 4 Device ID, Period, Offset for ; table indirect select ABSOLUTE dsa_msgout = 64 ; len 8 table indirect move parameter for ; select message ABSOLUTE dsa_cmdout = 72 ; len 8 table indirect move parameter for ; command ABSOLUTE dsa_dataout = 80 ; len 4 code pointer for dataout ABSOLUTE dsa_datain = 84 ; len 4 code pointer for datain ABSOLUTE dsa_msgin = 88 ; len 8 table indirect move for msgin ABSOLUTE dsa_status = 96 ; len 8 table indirect move for status byte ABSOLUTE dsa_msgout_other = 104 ; len 8 table indirect for normal message out ; (Synchronous transfer negotiation, etc). ABSOLUTE dsa_end = 112 ABSOLUTE schedule = 0 ; Array of JUMP dsa_begin or JUMP (next), ; terminated by a call to JUMP wait_reselect ; Linked lists of DSA structures ABSOLUTE reconnect_dsa_head = 0 ; Link list of DSAs which can reconnect ABSOLUTE addr_reconnect_dsa_head = 0 ; Address of variable contataining ; address of reconnect_dsa_head ; These select the source and destination of a MOVE MEMORY instruction ABSOLUTE dmode_memory_to_memory = 0x0 ABSOLUTE dmode_memory_to_ncr = 0x0 ABSOLUTE dmode_ncr_to_memory = 0x0 ABSOLUTE addr_scratch = 0x0 ABSOLUTE addr_temp = 0x0 ; Interrupts - ; MSB indicates type ; 0 handle error condition ; 1 handle message ; 2 handle normal condition ; 3 debugging interrupt ; 4 testing interrupt ; Next byte indicates specific error ; XXX not yet implemented, I'm not sure if I want to - ; Next byte indicates the routine the error occurred in ; The LSB indicates the specific place the error occurred ABSOLUTE int_err_unexpected_phase = 0x00000000 ; Unexpected phase encountered ABSOLUTE int_err_selected = 0x00010000 ; SELECTED (nee RESELECTED) ABSOLUTE int_err_unexpected_reselect = 0x00020000 ABSOLUTE int_err_check_condition = 0x00030000 ABSOLUTE int_err_no_phase = 0x00040000 ABSOLUTE int_msg_wdtr = 0x01000000 ; WDTR message received ABSOLUTE int_msg_sdtr = 0x01010000 ; SDTR received ABSOLUTE int_msg_1 = 0x01020000 ; single byte special message ; received ABSOLUTE int_norm_select_complete = 0x02000000 ; Select complete, reprogram ; registers. ABSOLUTE int_norm_reselect_complete = 0x02010000 ; Nexus established ABSOLUTE int_norm_command_complete = 0x02020000 ; Command complete ABSOLUTE int_norm_disconnected = 0x02030000 ; Disconnected ABSOLUTE int_norm_aborted =0x02040000 ; Aborted *dsa ABSOLUTE int_norm_reset = 0x02050000 ; Generated BUS reset. ABSOLUTE int_debug_break = 0x03000000 ; Break point ABSOLUTE int_debug_panic = 0x030b0000 ; Panic driver ABSOLUTE int_test_1 = 0x04000000 ; Test 1 complete ABSOLUTE int_test_2 = 0x04010000 ; Test 2 complete ABSOLUTE int_test_3 = 0x04020000 ; Test 3 complete ; These should start with 0x05000000, with low bits incrementing for ; each one. ABSOLUTE NCR53c7xx_msg_abort = 0 ; Pointer to abort message ABSOLUTE NCR53c7xx_msg_reject = 0 ; Pointer to reject message ABSOLUTE NCR53c7xx_zero = 0 ; long with zero in it, use for source ABSOLUTE NCR53c7xx_sink = 0 ; long to dump worthless data in ABSOLUTE NOP_insn = 0 ; NOP instruction ; Pointer to message, potentially multi-byte ABSOLUTE msg_buf = 0 ; Pointer to holding area for reselection information ABSOLUTE reselected_identify = 0 ABSOLUTE reselected_tag = 0 ; Request sense command pointer, it's a 6 byte command, should ; be constant for all commands since we always want 16 bytes of ; sense and we don't need to change any fields as we did under ; SCSI-I when we actually cared about the LUN field. ;EXTERNAL NCR53c7xx_sense ; Request sense command ; dsa_schedule ; PURPOSE : after a DISCONNECT message has been received, and pointers ; saved, insert the current DSA structure at the head of the ; disconnected queue and fall through to the scheduler. ; ; CALLS : OK ; ; INPUTS : dsa - current DSA structure, reconnect_dsa_head - list ; of disconnected commands ; ; MODIFIES : SCRATCH, reconnect_dsa_head ; ; EXITS : always passes control to schedule ENTRY dsa_schedule dsa_schedule: ; ; Calculate the address of the next pointer within the DSA ; structure of the command that is currently disconnecting ; CALL dsa_to_scratch at 0x0000005a : */ 0x88080000,0x00000938, /* MOVE SCRATCH0 + dsa_next TO SCRATCH0 at 0x0000005c : */ 0x7e343000,0x00000000, /* MOVE SCRATCH1 + 0 TO SCRATCH1 WITH CARRY at 0x0000005e : */ 0x7f350000,0x00000000, /* MOVE SCRATCH2 + 0 TO SCRATCH2 WITH CARRY at 0x00000060 : */ 0x7f360000,0x00000000, /* MOVE SCRATCH3 + 0 TO SCRATCH3 WITH CARRY at 0x00000062 : */ 0x7f370000,0x00000000, /* ; Point the next field of this DSA structure at the current disconnected ; list MOVE dmode_ncr_to_memory TO DMODE at 0x00000064 : */ 0x78380000,0x00000000, /* MOVE MEMORY 4, addr_scratch, dsa_schedule_insert + 8 at 0x00000066 : */ 0xc0000004,0x00000000,0x000001b4, /* MOVE dmode_memory_to_memory TO DMODE at 0x00000069 : */ 0x78380000,0x00000000, /* dsa_schedule_insert: MOVE MEMORY 4, reconnect_dsa_head, 0 at 0x0000006b : */ 0xc0000004,0x00000000,0x00000000, /* ; And update the head pointer. CALL dsa_to_scratch at 0x0000006e : */ 0x88080000,0x00000938, /* MOVE dmode_ncr_to_memory TO DMODE at 0x00000070 : */ 0x78380000,0x00000000, /* MOVE MEMORY 4, addr_scratch, reconnect_dsa_head at 0x00000072 : */ 0xc0000004,0x00000000,0x00000000, /* MOVE dmode_memory_to_memory TO DMODE at 0x00000075 : */ 0x78380000,0x00000000, /* MOVE SCNTL2 & 0x7f TO SCNTL2 at 0x00000077 : */ 0x7c027f00,0x00000000, /* CLEAR ACK at 0x00000079 : */ 0x60000040,0x00000000, /* WAIT DISCONNECT at 0x0000007b : */ 0x48000000,0x00000000, /* JUMP schedule at 0x0000007d : */ 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 0x0000007f : */ 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. ; SELECT ATN FROM dsa_select, select_failed at 0x00000081 : */ 0x4300003c,0x000007a4, /* JUMP select_msgout, WHEN MSG_OUT at 0x00000083 : */ 0x860b0000,0x00000214, /* ENTRY select_msgout select_msgout: MOVE FROM dsa_msgout, WHEN MSG_OUT at 0x00000085 : */ 0x1e000000,0x00000040, /* RETURN at 0x00000087 : */ 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: ; After a successful selection, we should get either a CMD phase or ; some transfer request negotiation message. JUMP cmdout, WHEN CMD at 0x00000089 : */ 0x820b0000,0x00000244, /* INT int_err_unexpected_phase, WHEN NOT MSG_IN at 0x0000008b : */ 0x9f030000,0x00000000, /* select_msg_in: CALL msg_in, WHEN MSG_IN at 0x0000008d : */ 0x8f0b0000,0x00000404, /* JUMP select_msg_in, WHEN MSG_IN at 0x0000008f : */ 0x870b0000,0x00000234, /* cmdout: INT int_err_unexpected_phase, WHEN NOT CMD at 0x00000091 : */ 0x9a030000,0x00000000, /* ENTRY cmdout_cmdout cmdout_cmdout: MOVE FROM dsa_cmdout, WHEN CMD at 0x00000093 : */ 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_tranfer_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 0x00000095 : */ 0x820b0000,0x0000024c, /* CALL msg_in, WHEN MSG_IN at 0x00000097 : */ 0x8f0b0000,0x00000404, /* INT int_err_unexpected_phase, WHEN MSG_OUT at 0x00000099 : */ 0x9e0b0000,0x00000000, /* JUMP do_dataout, WHEN DATA_OUT at 0x0000009b : */ 0x800b0000,0x0000028c, /* JUMP do_datain, WHEN DATA_IN at 0x0000009d : */ 0x810b0000,0x000002e4, /* JUMP command_complete, WHEN STATUS at 0x0000009f : */ 0x830b0000,0x0000060c, /* JUMP data_transfer at 0x000000a1 : */ 0x80080000,0x00000254, /* 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: CALL dsa_to_scratch at 0x000000a3 : */ 0x88080000,0x00000938, /* MOVE SCRATCH0 + dsa_dataout TO SCRATCH0 at 0x000000a5 : */ 0x7e345000,0x00000000, /* MOVE SCRATCH1 + 0 TO SCRATCH1 WITH CARRY at 0x000000a7 : */ 0x7f350000,0x00000000, /* MOVE SCRATCH2 + 0 TO SCRATCH2 WITH CARRY at 0x000000a9 : */ 0x7f360000,0x00000000, /* MOVE SCRATCH3 + 0 TO SCRATCH3 WITH CARRY at 0x000000ab : */ 0x7f370000,0x00000000, /* MOVE dmode_ncr_to_memory TO DMODE at 0x000000ad : */ 0x78380000,0x00000000, /* MOVE MEMORY 4, addr_scratch, dataout_to_jump + 4 at 0x000000af : */ 0xc0000004,0x00000000,0x000002d4, /* MOVE dmode_memory_to_memory TO DMODE at 0x000000b2 : */ 0x78380000,0x00000000, /* dataout_to_jump: MOVE MEMORY 4, 0, dataout_jump + 4 at 0x000000b4 : */ 0xc0000004,0x00000000,0x000002e0, /* dataout_jump: JUMP 0 at 0x000000b7 : */ 0x80080000,0x00000000, /* ; Nasty jump to dsa->dsain do_datain: CALL dsa_to_scratch at 0x000000b9 : */ 0x88080000,0x00000938, /* MOVE SCRATCH0 + dsa_datain TO SCRATCH0 at 0x000000bb : */ 0x7e345400,0x00000000, /* MOVE SCRATCH1 + 0 TO SCRATCH1 WITH CARRY at 0x000000bd : */ 0x7f350000,0x00000000, /* MOVE SCRATCH2 + 0 TO SCRATCH2 WITH CARRY at 0x000000bf : */ 0x7f360000,0x00000000, /* MOVE SCRATCH3 + 0 TO SCRATCH3 WITH CARRY at 0x000000c1 : */ 0x7f370000,0x00000000, /* MOVE dmode_ncr_to_memory TO DMODE at 0x000000c3 : */ 0x78380000,0x00000000, /* MOVE MEMORY 4, addr_scratch, datain_to_jump + 4 at 0x000000c5 : */ 0xc0000004,0x00000000,0x0000032c, /* MOVE dmode_memory_to_memory TO DMODE at 0x000000c8 : */ 0x78380000,0x00000000, /* ENTRY datain_to_jump datain_to_jump: MOVE MEMORY 4, 0, datain_jump + 4 at 0x000000ca : */ 0xc0000004,0x00000000,0x00000338, /* datain_jump: JUMP 0 at 0x000000cd : */ 0x80080000,0x00000000, /* ; Note that other_out and other_in loop until a non-data phase ; is discoverred, 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 0x000000cf : */ 0x9a0b0000,0x00000000, /* JUMP msg_in_restart, WHEN MSG_IN at 0x000000d1 : */ 0x870b0000,0x000003e4, /* INT int_err_unexpected_phase, WHEN MSG_OUT at 0x000000d3 : */ 0x9e0b0000,0x00000000, /* INT int_err_unexpected_phase, WHEN DATA_IN at 0x000000d5 : */ 0x990b0000,0x00000000, /* JUMP command_complete, WHEN STATUS at 0x000000d7 : */ 0x830b0000,0x0000060c, /* JUMP other_out, WHEN NOT DATA_OUT at 0x000000d9 : */ 0x80030000,0x0000033c, /* RETURN at 0x000000db : */ 0x90080000,0x00000000, /* ENTRY other_in other_in: INT int_err_unexpected_phase, WHEN CMD at 0x000000dd : */ 0x9a0b0000,0x00000000, /* JUMP msg_in_restart, WHEN MSG_IN at 0x000000df : */ 0x870b0000,0x000003e4, /* INT int_err_unexpected_phase, WHEN MSG_OUT at 0x000000e1 : */ 0x9e0b0000,0x00000000, /* INT int_err_unexpected_phase, WHEN DATA_OUT at 0x000000e3 : */ 0x980b0000,0x00000000, /* JUMP command_complete, WHEN STATUS at 0x000000e5 : */ 0x830b0000,0x0000060c, /* JUMP other_in, WHEN NOT DATA_IN at 0x000000e7 : */ 0x81030000,0x00000374, /* RETURN at 0x000000e9 : */ 0x90080000,0x00000000, /* ENTRY other_transfer other_transfer: INT int_err_unexpected_phase, WHEN CMD at 0x000000eb : */ 0x9a0b0000,0x00000000, /* CALL msg_in, WHEN MSG_IN at 0x000000ed : */ 0x8f0b0000,0x00000404, /* INT int_err_unexpected_phase, WHEN MSG_OUT at 0x000000ef : */ 0x9e0b0000,0x00000000, /* INT int_err_unexpected_phase, WHEN DATA_OUT at 0x000000f1 : */ 0x980b0000,0x00000000, /* INT int_err_unexpected_phase, WHEN DATA_IN at 0x000000f3 : */ 0x990b0000,0x00000000, /* JUMP command_complete, WHEN STATUS at 0x000000f5 : */ 0x830b0000,0x0000060c, /* JUMP other_transfer at 0x000000f7 : */ 0x80080000,0x000003ac, /* ; ; 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 ; hasnt 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. ; ; DISCONNECT messages are handled by moving the command ; to the reconnect_dsa_queue. ; ; INPUTS : DSA - SCSI COMMAND, SFBR - first byte of message (munge_msg ; only) ; ; CALLS : NO. The TEMP register isn't backed up to allow nested calls. ; ; MODIFIES : SCRATCH, DSA on DISCONNECT ; ; EXITS : On receipt of SAVE DATA POINTER, RESTORE POINTERS, ; and normal return from message handlers running under ; Linux, control is returned to the caller. Receipt ; of DISCONNECT messages pass control to dsa_schedule. ; ENTRY msg_in_restart msg_in_restart: ; XXX - hackish ; ; Since it's easier to debug changes to the statically ; compiled code, rather than the dynamically generated ; stuff, such as ; ; MOVE x, y, WHEN data_phase ; CALL other_z, WHEN NOT data_phase ; MOVE x, y, WHEN data_phase ; ; I'd like to have certain routines (notably the message handler) ; restart on the conditional call rather than the next instruction. ; ; So, subtract 8 from the return address MOVE TEMP0 + 0xf8 TO TEMP0 at 0x000000f9 : */ 0x7e1cf800,0x00000000, /* MOVE TEMP1 + 0xff TO TEMP1 WITH CARRY at 0x000000fb : */ 0x7f1dff00,0x00000000, /* MOVE TEMP2 + 0xff TO TEMP2 WITH CARRY at 0x000000fd : */ 0x7f1eff00,0x00000000, /* MOVE TEMP3 + 0xff TO TEMP3 WITH CARRY at 0x000000ff : */ 0x7f1fff00,0x00000000, /* ENTRY msg_in msg_in: MOVE 1, msg_buf, WHEN MSG_IN at 0x00000101 : */ 0x0f000001,0x00000000, /* munge_msg: JUMP munge_extended, IF 0x01 ; EXTENDED MESSAGE at 0x00000103 : */ 0x800c0001,0x00000524, /* JUMP munge_2, IF 0x20, AND MASK 0xdf ; two byte message at 0x00000105 : */ 0x800cdf20,0x0000044c, /* ; ; XXX - I've seen a handful of broken SCSI devices which fail to issue ; a SAVE POINTERS message before disconnecting in the middle of ; a transfer, assuming that the DATA POINTER will be implicitly ; restored. ; ; Historically, I've often done an implicit save when the DISCONNECT ; message is processed. We may want to consider having the option of ; doing that here. ; JUMP munge_save_data_pointer, IF 0x02 ; SAVE DATA POINTER at 0x00000107 : */ 0x800c0002,0x00000454, /* JUMP munge_restore_pointers, IF 0x03 ; RESTORE POINTERS at 0x00000109 : */ 0x800c0003,0x000004b8, /* JUMP munge_disconnect, IF 0x04 ; DISCONNECT at 0x0000010b : */ 0x800c0004,0x0000051c, /* INT int_msg_1, IF 0x07 ; MESSAGE REJECT at 0x0000010d : */ 0x980c0007,0x01020000, /* INT int_msg_1, IF 0x0f ; INITIATE RECOVERY at 0x0000010f : */ 0x980c000f,0x01020000, /* JUMP reject_message at 0x00000111 : */ 0x80080000,0x000005b4, /* munge_2: JUMP reject_message at 0x00000113 : */ 0x80080000,0x000005b4, /* ; ; The SCSI standard allows targets to recover from transient ; error conditions by backing up the data pointer with a ; RESTORE POINTERS message. ; ; So, we must save and restore the _residual_ code as well as ; the current instruction pointer. Because of this messiness, ; it is simpler to put dynamic code in the dsa for this and to ; just do a simple jump down there. ; munge_save_data_pointer: MOVE DSA0 + dsa_save_data_pointer TO SFBR at 0x00000115 : */ 0x76100000,0x00000000, /* MOVE SFBR TO SCRATCH0 at 0x00000117 : */ 0x6a340000,0x00000000, /* MOVE DSA1 + 0xff TO SFBR WITH CARRY at 0x00000119 : */ 0x7711ff00,0x00000000, /* MOVE SFBR TO SCRATCH1 at 0x0000011b : */ 0x6a350000,0x00000000, /* MOVE DSA2 + 0xff TO SFBR WITH CARRY at 0x0000011d : */ 0x7712ff00,0x00000000, /* MOVE SFBR TO SCRATCH2 at 0x0000011f : */ 0x6a360000,0x00000000, /* MOVE DSA3 + 0xff TO SFBR WITH CARRY at 0x00000121 : */ 0x7713ff00,0x00000000, /* MOVE SFBR TO SCRATCH3 at 0x00000123 : */ 0x6a370000,0x00000000, /* MOVE dmode_ncr_to_memory TO DMODE at 0x00000125 : */ 0x78380000,0x00000000, /* MOVE MEMORY 4, addr_scratch, jump_dsa_save + 4 at 0x00000127 : */ 0xc0000004,0x00000000,0x000004b4, /* MOVE dmode_memory_to_memory TO DMODE at 0x0000012a : */ 0x78380000,0x00000000, /* jump_dsa_save: JUMP 0 at 0x0000012c : */ 0x80080000,0x00000000, /* munge_restore_pointers: MOVE DSA0 + dsa_restore_pointers TO SFBR at 0x0000012e : */ 0x76100000,0x00000000, /* MOVE SFBR TO SCRATCH0 at 0x00000130 : */ 0x6a340000,0x00000000, /* MOVE DSA1 + 0xff TO SFBR WITH CARRY at 0x00000132 : */ 0x7711ff00,0x00000000, /* MOVE SFBR TO SCRATCH1 at 0x00000134 : */ 0x6a350000,0x00000000, /* MOVE DSA2 + 0xff TO SFBR WITH CARRY at 0x00000136 : */ 0x7712ff00,0x00000000, /* MOVE SFBR TO SCRATCH2 at 0x00000138 : */ 0x6a360000,0x00000000, /* MOVE DSA3 + 0xff TO SFBR WITH CARRY at 0x0000013a : */ 0x7713ff00,0x00000000, /* MOVE SFBR TO SCRATCH3 at 0x0000013c : */ 0x6a370000,0x00000000, /* MOVE dmode_ncr_to_memory TO DMODE at 0x0000013e : */ 0x78380000,0x00000000, /* MOVE MEMORY 4, addr_scratch, jump_dsa_restore + 4 at 0x00000140 : */ 0xc0000004,0x00000000,0x00000518, /* MOVE dmode_memory_to_memory TO DMODE at 0x00000143 : */ 0x78380000,0x00000000, /* jump_dsa_restore: JUMP 0 at 0x00000145 : */ 0x80080000,0x00000000, /* munge_disconnect: JUMP dsa_schedule at 0x00000147 : */ 0x80080000,0x00000168, /* munge_extended: CLEAR ACK at 0x00000149 : */ 0x60000040,0x00000000, /* INT int_err_unexpected_phase, WHEN NOT MSG_IN at 0x0000014b : */ 0x9f030000,0x00000000, /* MOVE 1, msg_buf + 1, WHEN MSG_IN at 0x0000014d : */ 0x0f000001,0x00000001, /* JUMP munge_extended_2, IF 0x02 at 0x0000014f : */ 0x800c0002,0x00000554, /* JUMP munge_extended_3, IF 0x03 at 0x00000151 : */ 0x800c0003,0x00000584, /* JUMP reject_message at 0x00000153 : */ 0x80080000,0x000005b4, /* munge_extended_2: CLEAR ACK at 0x00000155 : */ 0x60000040,0x00000000, /* MOVE 1, msg_buf + 2, WHEN MSG_IN at 0x00000157 : */ 0x0f000001,0x00000002, /* JUMP reject_message, IF NOT 0x02 ; Must be WDTR at 0x00000159 : */ 0x80040002,0x000005b4, /* CLEAR ACK at 0x0000015b : */ 0x60000040,0x00000000, /* MOVE 1, msg_buf + 3, WHEN MSG_IN at 0x0000015d : */ 0x0f000001,0x00000003, /* INT int_msg_wdtr at 0x0000015f : */ 0x98080000,0x01000000, /* munge_extended_3: CLEAR ACK at 0x00000161 : */ 0x60000040,0x00000000, /* MOVE 1, msg_buf + 2, WHEN MSG_IN at 0x00000163 : */ 0x0f000001,0x00000002, /* JUMP reject_message, IF NOT 0x01 ; Must be SDTR at 0x00000165 : */ 0x80040001,0x000005b4, /* CLEAR ACK at 0x00000167 : */ 0x60000040,0x00000000, /* MOVE 2, msg_buf + 3, WHEN MSG_IN at 0x00000169 : */ 0x0f000002,0x00000003, /* INT int_msg_sdtr at 0x0000016b : */ 0x98080000,0x01010000, /* ENTRY reject_message reject_message: SET ATN at 0x0000016d : */ 0x58000008,0x00000000, /* CLEAR ACK at 0x0000016f : */ 0x60000040,0x00000000, /* MOVE 1, NCR53c7xx_msg_reject, WHEN MSG_OUT at 0x00000171 : */ 0x0e000001,0x00000000, /* RETURN at 0x00000173 : */ 0x90080000,0x00000000, /* ENTRY accept_message accept_message: CLEAR ATN at 0x00000175 : */ 0x60000008,0x00000000, /* CLEAR ACK at 0x00000177 : */ 0x60000040,0x00000000, /* RETURN at 0x00000179 : */ 0x90080000,0x00000000, /* ENTRY respond_message respond_message: SET ATN at 0x0000017b : */ 0x58000008,0x00000000, /* CLEAR ACK at 0x0000017d : */ 0x60000040,0x00000000, /* MOVE FROM dsa_msgout_other, WHEN MSG_OUT at 0x0000017f : */ 0x1e000000,0x00000068, /* RETURN at 0x00000181 : */ 0x90080000,0x00000000, /* ; ; command_complete ; ; PURPOSE : handle command termination when STATUS IN is detected by reading ; a status byte followed by a command termination message. ; ; Normal termination results in an INTFLY instruction, and ; the host system can pick out which command terminated by ; examining the MESSAGE and STATUS buffers of all currently ; executing commands; ; ; Abnormal (CHECK_CONDITION) termination results in an ; int_err_check_condition interrupt so that a REQUEST SENSE ; command can be issued out-of-order so that no other command ; clears the contingent allegiance condition. ; ; ; INPUTS : DSA - command ; ; CALLS : OK ; ; EXITS : On successful termination, control is passed to schedule. ; On abnormal termination, the user will usually modify the ; DSA fields and corresponding buffers and return control ; to select. ; ENTRY command_complete command_complete: MOVE FROM dsa_status, WHEN STATUS at 0x00000183 : */ 0x1b000000,0x00000060, /* MOVE SFBR TO SCRATCH0 ; Save status at 0x00000185 : */ 0x6a340000,0x00000000, /* ENTRY command_complete_msgin command_complete_msgin: MOVE FROM dsa_msgin, WHEN MSG_IN at 0x00000187 : */ 0x1f000000,0x00000058, /* ; Indicate that we should be expecting a disconnect MOVE SCNTL2 & 0x7f TO SCNTL2 at 0x00000189 : */ 0x7c027f00,0x00000000, /* CLEAR ACK at 0x0000018b : */ 0x60000040,0x00000000, /* WAIT DISCONNECT at 0x0000018d : */ 0x48000000,0x00000000, /* ; ; The SCSI specification states that when a UNIT ATTENTION condition ; is pending, as indicated by a CHECK CONDITION status message, ; the target shall revert to asynchronous transfers. Since ; synchronous transfers parameters are maintained on a per INITIATOR/TARGET ; basis, and returning control to our scheduler could work on a command ; running on another lun on that target using the old parameters, we must ; interrupt the host processor to get them changed, or change them ourselves. ; ; Once SCSI-II tagged queueing is implemented, things will be even more ; hairy, since contingent allegiance conditions exist on a per-target/lun ; basis, and issuing a new command with a different tag would clear it. ; In these cases, we must interrupt the host processor to get a request ; added to the HEAD of the queue with the request sense command, or we ; must automatically issue the request sense command. INTFLY at 0x0000018f : */ 0x98180000,0x00000000, /* JUMP schedule at 0x00000191 : */ 0x80080000,0x00000000, /* command_failed: INT int_err_check_condition at 0x00000193 : */ 0x98080000,0x00030000, /* ; ; wait_reselect ; ; PURPOSE : This is essentially the idle routine, where control lands ; when there are no new processes to schedule. wait_reselect ; waits for reselection, selection, and new commands. ; ; When a successful reselection occurs, with the aid ; of fixed up code in each DSA, wait_reselect walks the ; reconnect_dsa_queue, asking each dsa if the target ID ; and LUN match its. ; ; If a match is found, a call is made back to reselected_ok, ; which through the miracles of self modifying code, extracts ; the found DSA from the reconnect_dsa_queue and then ; returns control to the DSAs thread of execution. ; ; INPUTS : NONE ; ; CALLS : OK ; ; MODIFIES : DSA, ; ; EXITS : On successful reselection, control is returned to the ; DSA which called reselected_ok. If the WAIT RESELECT ; was interrupted by a new commands arrival signaled by ; SIG_P, control is passed to schedule. If the NCR is ; selected, the host system is interrupted with an ; int_err_selected which is usually responded to by ; setting DSP to the target_abort address. ENTRY wait_reselect wait_reselect: WAIT RESELECT wait_reselect_failed at 0x00000195 : */ 0x50000000,0x0000076c, /* reselected: CLEAR TARGET at 0x00000197 : */ 0x60000200,0x00000000, /* MOVE dmode_memory_to_memory TO DMODE at 0x00000199 : */ 0x78380000,0x00000000, /* ; Read all data needed to reestablish the nexus - MOVE 1, reselected_identify, WHEN MSG_IN at 0x0000019b : */ 0x0f000001,0x00000000, /* ; We used to CLEAR ACK here. ; Point DSA at the current head of the disconnected queue. MOVE dmode_memory_to_ncr TO DMODE at 0x0000019d : */ 0x78380000,0x00000000, /* MOVE MEMORY 4, reconnect_dsa_head, addr_scratch at 0x0000019f : */ 0xc0000004,0x00000000,0x00000000, /* MOVE dmode_memory_to_memory TO DMODE at 0x000001a2 : */ 0x78380000,0x00000000, /* CALL scratch_to_dsa at 0x000001a4 : */ 0x88080000,0x00000980, /* ; Fix the update-next pointer so that the reconnect_dsa_head ; pointer is the one that will be updated if this DSA is a hit ; and we remove it from the queue. MOVE MEMORY 4, addr_reconnect_dsa_head, reselected_ok + 8 at 0x000001a6 : */ 0xc0000004,0x00000000,0x00000758, /* ENTRY reselected_check_next reselected_check_next: ; Check for a NULL pointer. MOVE DSA0 TO SFBR at 0x000001a9 : */ 0x72100000,0x00000000, /* JUMP reselected_not_end, IF NOT 0 at 0x000001ab : */ 0x80040000,0x000006ec, /* MOVE DSA1 TO SFBR at 0x000001ad : */ 0x72110000,0x00000000, /* JUMP reselected_not_end, IF NOT 0 at 0x000001af : */ 0x80040000,0x000006ec, /* MOVE DSA2 TO SFBR at 0x000001b1 : */ 0x72120000,0x00000000, /* JUMP reselected_not_end, IF NOT 0 at 0x000001b3 : */ 0x80040000,0x000006ec, /* MOVE DSA3 TO SFBR at 0x000001b5 : */ 0x72130000,0x00000000, /* JUMP reselected_not_end, IF NOT 0 at 0x000001b7 : */ 0x80040000,0x000006ec, /* INT int_err_unexpected_reselect at 0x000001b9 : */ 0x98080000,0x00020000, /* reselected_not_end: ; ; XXX the ALU is only eight bits wide, and the assembler ; wont do the dirt work for us. As long as dsa_check_reselect ; is negative, we need to sign extend with 1 bits to the full ; 32 bit width of the address. ; ; A potential work around would be to have a known alignment ; of the DSA structure such that the base address plus ; dsa_check_reselect doesn't require carrying from bytes ; higher than the LSB. ; MOVE DSA0 TO SFBR at 0x000001bb : */ 0x72100000,0x00000000, /* MOVE SFBR + dsa_check_reselect TO SCRATCH0 at 0x000001bd : */ 0x6e340000,0x00000000, /* MOVE DSA1 TO SFBR at 0x000001bf : */ 0x72110000,0x00000000, /* MOVE SFBR + 0xff TO SCRATCH1 WITH CARRY at 0x000001c1 : */ 0x6f35ff00,0x00000000, /* MOVE DSA2 TO SFBR at 0x000001c3 : */ 0x72120000,0x00000000, /* MOVE SFBR + 0xff TO SCRATCH2 WITH CARRY at 0x000001c5 : */ 0x6f36ff00,0x00000000, /* MOVE DSA3 TO SFBR at 0x000001c7 : */ 0x72130000,0x00000000, /* MOVE SFBR + 0xff TO SCRATCH3 WITH CARRY at 0x000001c9 : */ 0x6f37ff00,0x00000000, /* MOVE dmode_ncr_to_memory TO DMODE at 0x000001cb : */ 0x78380000,0x00000000, /* MOVE MEMORY 4, addr_scratch, reselected_check + 4 at 0x000001cd : */ 0xc0000004,0x00000000,0x0000074c, /* MOVE dmode_memory_to_memory TO DMODE at 0x000001d0 : */ 0x78380000,0x00000000, /* reselected_check: JUMP 0 at 0x000001d2 : */ 0x80080000,0x00000000, /* ; ; ENTRY reselected_ok reselected_ok: MOVE MEMORY 4, 0, 0 ; Patched : first word at 0x000001d4 : */ 0xc0000004,0x00000000,0x00000000, /* ; is address of ; successful dsa_next ; Second word is last ; unsuccessful dsa_next, ; starting with ; dsa_reconnect_head ; We used to CLEAR ACK here. RETURN ; Return control to where at 0x000001d7 : */ 0x90080000,0x00000000, /* selected: INT int_err_selected; at 0x000001d9 : */ 0x98080000,0x00010000, /* ; ; A select or reselect failure can be caused by one of two conditions : ; 1. SIG_P was set. This will be the case if the user has written ; a new value to a previously NULL head of the issue queue. ; ; 2. The NCR53c810 was selected or reselected by another device. ; ; 3. The bus was allready busy since we were selected or reselected ; before starting the command. wait_reselect_failed: ; Check selected bit. MOVE SIST0 & 0x20 TO SFBR at 0x000001db : */ 0x74422000,0x00000000, /* JUMP selected, IF 0x20 at 0x000001dd : */ 0x800c0020,0x00000764, /* ; Reading CTEST2 clears the SIG_P bit in the ISTAT register. MOVE CTEST2 & 0x40 TO SFBR at 0x000001df : */ 0x741a4000,0x00000000, /* JUMP schedule, IF 0x40 at 0x000001e1 : */ 0x800c0040,0x00000000, /* ; Check connected bit. ; FIXME: this needs to change if we support target mode MOVE ISTAT & 0x08 TO SFBR at 0x000001e3 : */ 0x74140800,0x00000000, /* JUMP reselected, IF 0x08 at 0x000001e5 : */ 0x800c0008,0x0000065c, /* ; FIXME : Something bogus happened, and we shouldn't fail silently. INT int_debug_panic at 0x000001e7 : */ 0x98080000,0x030b0000, /* select_failed: ; Otherwise, mask the selected and reselected bits off SIST0 MOVE SIST0 & 0x30 TO SFBR at 0x000001e9 : */ 0x74423000,0x00000000, /* JUMP selected, IF 0x20 at 0x000001eb : */ 0x800c0020,0x00000764, /* JUMP reselected, IF 0x10 at 0x000001ed : */ 0x800c0010,0x0000065c, /* ; If SIGP is set, the user just gave us another command, and ; we should restart or return to the scheduler. ; Reading CTEST2 clears the SIG_P bit in the ISTAT register. MOVE CTEST2 & 0x40 TO SFBR at 0x000001ef : */ 0x741a4000,0x00000000, /* JUMP select, IF 0x40 at 0x000001f1 : */ 0x800c0040,0x000001fc, /* ; Check connected bit. ; FIXME: this needs to change if we support target mode ; FIXME: is this really necessary? MOVE ISTAT & 0x08 TO SFBR at 0x000001f3 : */ 0x74140800,0x00000000, /* JUMP reselected, IF 0x08 at 0x000001f5 : */ 0x800c0008,0x0000065c, /* ; FIXME : Something bogus happened, and we shouldn't fail silently. INT int_debug_panic at 0x000001f7 : */ 0x98080000,0x030b0000, /* ; ; test_1 ; test_2 ; ; PURPOSE : run some verification tests on the NCR. test_1 ; copies test_src to test_dest and interrupts the host ; processor, testing for cache coherency and interrupt ; problems in the processes. ; ; test_2 runs a command with offsets relative to the ; DSA on entry, and is useful for miscellaneous experimentation. ; ; Verify that interrupts are working correctly and that we don't ; have a cache invalidation problem. ABSOLUTE test_src = 0, test_dest = 0 ENTRY test_1 test_1: MOVE MEMORY 4, test_src, test_dest at 0x000001f9 : */ 0xc0000004,0x00000000,0x00000000, /* INT int_test_1 at 0x000001fc : */ 0x98080000,0x04000000, /* ; ; Run arbitrary commands, with test code establishing a DSA ; ENTRY test_2 test_2: CLEAR TARGET at 0x000001fe : */ 0x60000200,0x00000000, /* SELECT ATN FROM 0, test_2_fail at 0x00000200 : */ 0x43000000,0x00000850, /* JUMP test_2_msgout, WHEN MSG_OUT at 0x00000202 : */ 0x860b0000,0x00000810, /* ENTRY test_2_msgout test_2_msgout: MOVE FROM 8, WHEN MSG_OUT at 0x00000204 : */ 0x1e000000,0x00000008, /* MOVE FROM 16, WHEN CMD at 0x00000206 : */ 0x1a000000,0x00000010, /* MOVE FROM 24, WHEN DATA_IN at 0x00000208 : */ 0x19000000,0x00000018, /* MOVE FROM 32, WHEN STATUS at 0x0000020a : */ 0x1b000000,0x00000020, /* MOVE FROM 40, WHEN MSG_IN at 0x0000020c : */ 0x1f000000,0x00000028, /* MOVE SCNTL2 & 0x7f TO SCNTL2 at 0x0000020e : */ 0x7c027f00,0x00000000, /* CLEAR ACK at 0x00000210 : */ 0x60000040,0x00000000, /* WAIT DISCONNECT at 0x00000212 : */ 0x48000000,0x00000000, /* test_2_fail: INT int_test_2 at 0x00000214 : */ 0x98080000,0x04010000, /* ENTRY debug_break debug_break: INT int_debug_break at 0x00000216 : */ 0x98080000,0x03000000, /* ; ; initiator_abort ; target_abort ; ; PURPOSE : Abort the currently established nexus from with initiator ; or target mode. ; ; ENTRY target_abort target_abort: SET TARGET at 0x00000218 : */ 0x58000200,0x00000000, /* DISCONNECT at 0x0000021a : */ 0x48000000,0x00000000, /* CLEAR TARGET at 0x0000021c : */ 0x60000200,0x00000000, /* JUMP schedule at 0x0000021e : */ 0x80080000,0x00000000, /* ENTRY initiator_abort initiator_abort: SET ATN at 0x00000220 : */ 0x58000008,0x00000000, /* ; ; The SCSI-I specification says that targets may go into MSG out at ; their leisure upon receipt of the ATN single. On all versions of the ; specification, we can't change phases until REQ transitions true->false, ; so we need to sink/source one byte of data to allow the transition. ; ; For the sake of safety, we'll only source one byte of data in all ; cases, but to accomodate the SCSI-I dain bramage, we'll sink an ; arbitrary number of bytes. JUMP spew_cmd, WHEN CMD at 0x00000222 : */ 0x820b0000,0x000008b8, /* JUMP eat_msgin, WHEN MSG_IN at 0x00000224 : */ 0x870b0000,0x000008c8, /* JUMP eat_datain, WHEN DATA_IN at 0x00000226 : */ 0x810b0000,0x000008f8, /* JUMP eat_status, WHEN STATUS at 0x00000228 : */ 0x830b0000,0x000008e0, /* JUMP spew_dataout, WHEN DATA_OUT at 0x0000022a : */ 0x800b0000,0x00000910, /* JUMP sated at 0x0000022c : */ 0x80080000,0x00000918, /* spew_cmd: MOVE 1, NCR53c7xx_zero, WHEN CMD at 0x0000022e : */ 0x0a000001,0x00000000, /* JUMP sated at 0x00000230 : */ 0x80080000,0x00000918, /* eat_msgin: MOVE 1, NCR53c7xx_sink, WHEN MSG_IN at 0x00000232 : */ 0x0f000001,0x00000000, /* JUMP eat_msgin, WHEN MSG_IN at 0x00000234 : */ 0x870b0000,0x000008c8, /* JUMP sated at 0x00000236 : */ 0x80080000,0x00000918, /* eat_status: MOVE 1, NCR53c7xx_sink, WHEN STATUS at 0x00000238 : */ 0x0b000001,0x00000000, /* JUMP eat_status, WHEN STATUS at 0x0000023a : */ 0x830b0000,0x000008e0, /* JUMP sated at 0x0000023c : */ 0x80080000,0x00000918, /* eat_datain: MOVE 1, NCR53c7xx_sink, WHEN DATA_IN at 0x0000023e : */ 0x09000001,0x00000000, /* JUMP eat_datain, WHEN DATA_IN at 0x00000240 : */ 0x810b0000,0x000008f8, /* JUMP sated at 0x00000242 : */ 0x80080000,0x00000918, /* spew_dataout: MOVE 1, NCR53c7xx_zero, WHEN DATA_OUT at 0x00000244 : */ 0x08000001,0x00000000, /* sated: MOVE SCNTL2 & 0x7f TO SCNTL2 at 0x00000246 : */ 0x7c027f00,0x00000000, /* MOVE 1, NCR53c7xx_msg_abort, WHEN MSG_OUT at 0x00000248 : */ 0x0e000001,0x00000000, /* WAIT DISCONNECT at 0x0000024a : */ 0x48000000,0x00000000, /* INT int_norm_aborted at 0x0000024c : */ 0x98080000,0x02040000, /* ; ; dsa_to_scratch ; scratch_to_dsa ; ; PURPOSE : ; The NCR chips cannot do a move memory instruction with the DSA register ; as the source or destination. So, we provide a couple of subroutines ; that let us switch between the DSA register and scratch register. ; ; Memory moves to/from the DSPS register also don't work, but we ; don't use them. ; ; dsa_to_scratch: MOVE DSA0 TO SFBR at 0x0000024e : */ 0x72100000,0x00000000, /* MOVE SFBR TO SCRATCH0 at 0x00000250 : */ 0x6a340000,0x00000000, /* MOVE DSA1 TO SFBR at 0x00000252 : */ 0x72110000,0x00000000, /* MOVE SFBR TO SCRATCH1 at 0x00000254 : */ 0x6a350000,0x00000000, /* MOVE DSA2 TO SFBR at 0x00000256 : */ 0x72120000,0x00000000, /* MOVE SFBR TO SCRATCH2 at 0x00000258 : */ 0x6a360000,0x00000000, /* MOVE DSA3 TO SFBR at 0x0000025a : */ 0x72130000,0x00000000, /* MOVE SFBR TO SCRATCH3 at 0x0000025c : */ 0x6a370000,0x00000000, /* RETURN at 0x0000025e : */ 0x90080000,0x00000000, /* scratch_to_dsa: MOVE SCRATCH0 TO SFBR at 0x00000260 : */ 0x72340000,0x00000000, /* MOVE SFBR TO DSA0 at 0x00000262 : */ 0x6a100000,0x00000000, /* MOVE SCRATCH1 TO SFBR at 0x00000264 : */ 0x72350000,0x00000000, /* MOVE SFBR TO DSA1 at 0x00000266 : */ 0x6a110000,0x00000000, /* MOVE SCRATCH2 TO SFBR at 0x00000268 : */ 0x72360000,0x00000000, /* MOVE SFBR TO DSA2 at 0x0000026a : */ 0x6a120000,0x00000000, /* MOVE SCRATCH3 TO SFBR at 0x0000026c : */ 0x72370000,0x00000000, /* MOVE SFBR TO DSA3 at 0x0000026e : */ 0x6a130000,0x00000000, /* RETURN at 0x00000270 : */ 0x90080000,0x00000000, }; #define A_NCR53c7xx_msg_abort 0x00000000 u32 A_NCR53c7xx_msg_abort_used[] = { 0x00000249, }; #define A_NCR53c7xx_msg_reject 0x00000000 u32 A_NCR53c7xx_msg_reject_used[] = { 0x00000172, }; #define A_NCR53c7xx_sink 0x00000000 u32 A_NCR53c7xx_sink_used[] = { 0x00000233, 0x00000239, 0x0000023f, }; #define A_NCR53c7xx_zero 0x00000000 u32 A_NCR53c7xx_zero_used[] = { 0x0000022f, 0x00000245, }; #define A_NOP_insn 0x00000000 u32 A_NOP_insn_used[] = { 0x00000010, }; #define A_addr_reconnect_dsa_head 0x00000000 u32 A_addr_reconnect_dsa_head_used[] = { 0x000001a7, }; #define A_addr_scratch 0x00000000 u32 A_addr_scratch_used[] = { 0x00000004, 0x0000001b, 0x00000046, 0x00000067, 0x00000073, 0x000000b0, 0x000000c6, 0x00000128, 0x00000141, 0x000001a1, 0x000001ce, }; #define A_addr_temp 0x00000000 u32 A_addr_temp_used[] = { 0x00000025, 0x00000034, }; #define A_dmode_memory_to_memory 0x00000000 u32 A_dmode_memory_to_memory_used[] = { 0x00000005, 0x0000001c, 0x00000027, 0x00000035, 0x00000047, 0x00000069, 0x00000075, 0x000000b2, 0x000000c8, 0x0000012a, 0x00000143, 0x00000199, 0x000001a2, 0x000001d0, }; #define A_dmode_memory_to_ncr 0x00000000 u32 A_dmode_memory_to_ncr_used[] = { 0x00000000, 0x00000017, 0x00000030, 0x00000042, 0x0000019d, }; #define A_dmode_ncr_to_memory 0x00000000 u32 A_dmode_ncr_to_memory_used[] = { 0x00000022, 0x00000064, 0x00000070, 0x000000ad, 0x000000c3, 0x00000125, 0x0000013e, 0x000001cb, }; #define A_dsa_check_reselect 0x00000000 u32 A_dsa_check_reselect_used[] = { 0x000001bd, }; #define A_dsa_cmdout 0x00000048 u32 A_dsa_cmdout_used[] = { 0x00000094, }; #define A_dsa_cmnd 0x00000038 u32 A_dsa_cmnd_used[] = { }; #define A_dsa_datain 0x00000054 u32 A_dsa_datain_used[] = { 0x000000bb, }; #define A_dsa_dataout 0x00000050 u32 A_dsa_dataout_used[] = { 0x000000a5, }; #define A_dsa_end 0x00000070 u32 A_dsa_end_used[] = { }; #define A_dsa_fields_start 0x00000000 u32 A_dsa_fields_start_used[] = { }; #define A_dsa_msgin 0x00000058 u32 A_dsa_msgin_used[] = { 0x00000188, }; #define A_dsa_msgout 0x00000040 u32 A_dsa_msgout_used[] = { 0x00000086, }; #define A_dsa_msgout_other 0x00000068 u32 A_dsa_msgout_other_used[] = { 0x00000180, }; #define A_dsa_next 0x00000030 u32 A_dsa_next_used[] = { 0x0000005c, }; #define A_dsa_restore_pointers 0x00000000 u32 A_dsa_restore_pointers_used[] = { 0x0000012e, }; #define A_dsa_save_data_pointer 0x00000000 u32 A_dsa_save_data_pointer_used[] = { 0x00000115, }; #define A_dsa_select 0x0000003c u32 A_dsa_select_used[] = { 0x00000081, }; #define A_dsa_status 0x00000060 u32 A_dsa_status_used[] = { 0x00000184, }; #define A_dsa_temp_addr_array_value 0x00000000 u32 A_dsa_temp_addr_array_value_used[] = { }; #define A_dsa_temp_addr_dsa_value 0x00000000 u32 A_dsa_temp_addr_dsa_value_used[] = { 0x00000003, }; #define A_dsa_temp_addr_new_value 0x00000000 u32 A_dsa_temp_addr_new_value_used[] = { }; #define A_dsa_temp_addr_next 0x00000000 u32 A_dsa_temp_addr_next_used[] = { 0x00000015, 0x0000004e, }; #define A_dsa_temp_addr_residual 0x00000000 u32 A_dsa_temp_addr_residual_used[] = { 0x0000002a, 0x00000039, }; #define A_dsa_temp_addr_saved_pointer 0x00000000 u32 A_dsa_temp_addr_saved_pointer_used[] = { 0x00000026, 0x00000033, }; #define A_dsa_temp_addr_saved_residual 0x00000000 u32 A_dsa_temp_addr_saved_residual_used[] = { 0x0000002b, 0x00000038, }; #define A_dsa_temp_lun 0x00000000 u32 A_dsa_temp_lun_used[] = { 0x0000004b, }; #define A_dsa_temp_next 0x00000000 u32 A_dsa_temp_next_used[] = { 0x0000001a, }; #define A_dsa_temp_sync 0x00000000 u32 A_dsa_temp_sync_used[] = { 0x00000053, }; #define A_dsa_temp_target 0x00000000 u32 A_dsa_temp_target_used[] = { 0x00000040, }; #define A_int_debug_break 0x03000000 u32 A_int_debug_break_used[] = { 0x00000217, }; #define A_int_debug_panic 0x030b0000 u32 A_int_debug_panic_used[] = { 0x000001e8, 0x000001f8, }; #define A_int_err_check_condition 0x00030000 u32 A_int_err_check_condition_used[] = { 0x00000194, }; #define A_int_err_no_phase 0x00040000 u32 A_int_err_no_phase_used[] = { }; #define A_int_err_selected 0x00010000 u32 A_int_err_selected_used[] = { 0x000001da, }; #define A_int_err_unexpected_phase 0x00000000 u32 A_int_err_unexpected_phase_used[] = { 0x0000008c, 0x00000092, 0x0000009a, 0x000000d0, 0x000000d4, 0x000000d6, 0x000000de, 0x000000e2, 0x000000e4, 0x000000ec, 0x000000f0, 0x000000f2, 0x000000f4, 0x0000014c, }; #define A_int_err_unexpected_reselect 0x00020000 u32 A_int_err_unexpected_reselect_used[] = { 0x000001ba, }; #define A_int_msg_1 0x01020000 u32 A_int_msg_1_used[] = { 0x0000010e, 0x00000110, }; #define A_int_msg_sdtr 0x01010000 u32 A_int_msg_sdtr_used[] = { 0x0000016c, }; #define A_int_msg_wdtr 0x01000000 u32 A_int_msg_wdtr_used[] = { 0x00000160, }; #define A_int_norm_aborted 0x02040000 u32 A_int_norm_aborted_used[] = { 0x0000024d, }; #define A_int_norm_command_complete 0x02020000 u32 A_int_norm_command_complete_used[] = { }; #define A_int_norm_disconnected 0x02030000 u32 A_int_norm_disconnected_used[] = { }; #define A_int_norm_reselect_complete 0x02010000 u32 A_int_norm_reselect_complete_used[] = { }; #define A_int_norm_reset 0x02050000 u32 A_int_norm_reset_used[] = { }; #define A_int_norm_select_complete 0x02000000 u32 A_int_norm_select_complete_used[] = { }; #define A_int_test_1 0x04000000 u32 A_int_test_1_used[] = { 0x000001fd, }; #define A_int_test_2 0x04010000 u32 A_int_test_2_used[] = { 0x00000215, }; #define A_int_test_3 0x04020000 u32 A_int_test_3_used[] = { }; #define A_msg_buf 0x00000000 u32 A_msg_buf_used[] = { 0x00000102, 0x0000014e, 0x00000158, 0x0000015e, 0x00000164, 0x0000016a, }; #define A_reconnect_dsa_head 0x00000000 u32 A_reconnect_dsa_head_used[] = { 0x0000006c, 0x00000074, 0x000001a0, }; #define A_reselected_identify 0x00000000 u32 A_reselected_identify_used[] = { 0x00000045, 0x0000019c, }; #define A_reselected_tag 0x00000000 u32 A_reselected_tag_used[] = { }; #define A_schedule 0x00000000 u32 A_schedule_used[] = { 0x0000007e, 0x00000192, 0x000001e2, 0x0000021f, }; #define A_test_dest 0x00000000 u32 A_test_dest_used[] = { 0x000001fb, }; #define A_test_src 0x00000000 u32 A_test_src_used[] = { 0x000001fa, }; #define Ent_accept_message 0x000005d4 #define Ent_cmdout_cmdout 0x0000024c #define Ent_command_complete 0x0000060c #define Ent_command_complete_msgin 0x0000061c #define Ent_data_transfer 0x00000254 #define Ent_datain_to_jump 0x00000328 #define Ent_debug_break 0x00000858 #define Ent_dsa_code_begin 0x00000000 #define Ent_dsa_code_check_reselect 0x000000f8 #define Ent_dsa_code_fix_jump 0x0000003c #define Ent_dsa_code_restore_pointers 0x000000c0 #define Ent_dsa_code_save_data_pointer 0x00000088 #define Ent_dsa_code_template 0x00000000 #define Ent_dsa_code_template_end 0x00000168 #define Ent_dsa_schedule 0x00000168 #define Ent_dsa_zero 0x00000168 #define Ent_end_data_transfer 0x0000028c #define Ent_initiator_abort 0x00000880 #define Ent_msg_in 0x00000404 #define Ent_msg_in_restart 0x000003e4 #define Ent_other_in 0x00000374 #define Ent_other_out 0x0000033c #define Ent_other_transfer 0x000003ac #define Ent_reject_message 0x000005b4 #define Ent_reselected_check_next 0x000006a4 #define Ent_reselected_ok 0x00000750 #define Ent_respond_message 0x000005ec #define Ent_select 0x000001fc #define Ent_select_msgout 0x00000214 #define Ent_target_abort 0x00000860 #define Ent_test_1 0x000007e4 #define Ent_test_2 0x000007f8 #define Ent_test_2_msgout 0x00000810 #define Ent_wait_reselect 0x00000654 u32 LABELPATCHES[] = { 0x00000008, 0x0000000a, 0x00000013, 0x00000016, 0x0000001f, 0x00000021, 0x0000004f, 0x00000051, 0x0000005b, 0x00000068, 0x0000006f, 0x00000082, 0x00000084, 0x0000008a, 0x0000008e, 0x00000090, 0x00000096, 0x00000098, 0x0000009c, 0x0000009e, 0x000000a0, 0x000000a2, 0x000000a4, 0x000000b1, 0x000000b6, 0x000000ba, 0x000000c7, 0x000000cc, 0x000000d2, 0x000000d8, 0x000000da, 0x000000e0, 0x000000e6, 0x000000e8, 0x000000ee, 0x000000f6, 0x000000f8, 0x00000104, 0x00000106, 0x00000108, 0x0000010a, 0x0000010c, 0x00000112, 0x00000114, 0x00000129, 0x00000142, 0x00000148, 0x00000150, 0x00000152, 0x00000154, 0x0000015a, 0x00000166, 0x00000196, 0x000001a5, 0x000001a8, 0x000001ac, 0x000001b0, 0x000001b4, 0x000001b8, 0x000001cf, 0x000001de, 0x000001e6, 0x000001ec, 0x000001ee, 0x000001f2, 0x000001f6, 0x00000201, 0x00000203, 0x00000223, 0x00000225, 0x00000227, 0x00000229, 0x0000022b, 0x0000022d, 0x00000231, 0x00000235, 0x00000237, 0x0000023b, 0x0000023d, 0x00000241, 0x00000243, }; struct { u32 offset; void *address; } EXTERNAL_PATCHES[] = { }; u32 INSTRUCTIONS = 301; u32 PATCHES = 81; u32 EXTERNAL_PATCHES_LEN = 0; |