diff options
Diffstat (limited to 'drivers/scsi/53c7xx_d.h_shipped')
| -rw-r--r-- | drivers/scsi/53c7xx_d.h_shipped | 2874 |
1 files changed, 0 insertions, 2874 deletions
diff --git a/drivers/scsi/53c7xx_d.h_shipped b/drivers/scsi/53c7xx_d.h_shipped deleted file mode 100644 index 21d31b08ec3..00000000000 --- a/drivers/scsi/53c7xx_d.h_shipped +++ /dev/null @@ -1,2874 +0,0 @@ -/* DO NOT EDIT - Generated automatically by script_asm.pl */ -static u32 SCRIPT[] = { -/* - - - - - -; 53c710 driver. Modified from Drew Eckhardts driver -; for 53c810 by Richard Hirst [richard@sleepie.demon.co.uk] -; -; I have left the script for the 53c8xx family in here, as it is likely -; to be useful to see what I changed when bug hunting. - -; 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. -; - -; For some systems (MVME166, for example) dmode is always the same, so don't -; waste time writing it - - - - - - - - - - - -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_sscf_710 = 0 ; Patch to address of per-target - ; sscf value (53c710) -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 concisely, 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: -; RGH: Don't care about TEMP and DSA here - - MOVE MEMORY 4, dsa_temp_addr_dsa_value, addr_scratch - -at 0x00000000 : */ 0xc0000004,0x00000000,0x00000000, -/* - - - MOVE MEMORY 4, addr_scratch, saved_dsa - -at 0x00000003 : */ 0xc0000004,0x00000000,0x00000000, -/* - ; We are about to go and select the device, so must set SSCF bits - MOVE MEMORY 4, dsa_sscf_710, addr_scratch - -at 0x00000006 : */ 0xc0000004,0x00000000,0x00000000, -/* - - MOVE SCRATCH3 TO SFBR - -at 0x00000009 : */ 0x72370000,0x00000000, -/* - - - - MOVE SFBR TO SBCL - -at 0x0000000b : */ 0x6a0b0000,0x00000000, -/* - MOVE MEMORY 4, saved_dsa, addr_dsa - -at 0x0000000d : */ 0xc0000004,0x00000000,0x00000000, -/* - - - - CALL select - -at 0x00000010 : */ 0x88080000,0x000001f8, -/* -; 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 0x00000012 : */ 0x60000008,0x00000000, -/* - CLEAR ACK - -at 0x00000014 : */ 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 0x00000016 : */ 0xc0000004,0x00000000,0x00000000, -/* - JUMP select_done - -at 0x00000019 : */ 0x80080000,0x00000230, -/* - -; wrong_dsa loads the DSA register with the value of the dsa_next -; field. -; -wrong_dsa: - -; NOTE DSA is corrupt when we arrive here! - -; 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_patch + 8 - -at 0x0000001b : */ 0xc0000004,0x00000000,0x000007ec, -/* - -; -; 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 0x0000001e : */ 0xc0000004,0x00000000,0x00000000, -/* - - - MOVE MEMORY 4, addr_scratch, saved_dsa - -at 0x00000021 : */ 0xc0000004,0x00000000,0x00000000, -/* - MOVE MEMORY 4, saved_dsa, addr_dsa - -at 0x00000024 : */ 0xc0000004,0x00000000,0x00000000, -/* - - - - JUMP reselected_check_next - -at 0x00000027 : */ 0x80080000,0x000006f0, -/* - -ABSOLUTE dsa_save_data_pointer = 0 -ENTRY dsa_code_save_data_pointer -dsa_code_save_data_pointer: - - ; When we get here, TEMP has been saved in jump_temp+4, DSA is corrupt - ; We MUST return with DSA correct - MOVE MEMORY 4, jump_temp+4, dsa_temp_addr_saved_pointer - -at 0x00000029 : */ 0xc0000004,0x000009c8,0x00000000, -/* -; HARD CODED : 24 bytes needs to agree with 53c7,8xx.h - MOVE MEMORY 24, dsa_temp_addr_residual, dsa_temp_addr_saved_residual - -at 0x0000002c : */ 0xc0000018,0x00000000,0x00000000, -/* - CLEAR ACK - -at 0x0000002f : */ 0x60000040,0x00000000, -/* - - - - MOVE MEMORY 4, saved_dsa, addr_dsa - -at 0x00000031 : */ 0xc0000004,0x00000000,0x00000000, -/* - JUMP jump_temp - -at 0x00000034 : */ 0x80080000,0x000009c4, -/* - -ABSOLUTE dsa_restore_pointers = 0 -ENTRY dsa_code_restore_pointers -dsa_code_restore_pointers: - - ; TEMP and DSA are corrupt when we get here, but who cares! - MOVE MEMORY 4, dsa_temp_addr_saved_pointer, jump_temp + 4 - -at 0x00000036 : */ 0xc0000004,0x00000000,0x000009c8, -/* -; HARD CODED : 24 bytes needs to agree with 53c7,8xx.h - MOVE MEMORY 24, dsa_temp_addr_saved_residual, dsa_temp_addr_residual - -at 0x00000039 : */ 0xc0000018,0x00000000,0x00000000, -/* - CLEAR ACK - -at 0x0000003c : */ 0x60000040,0x00000000, -/* - ; Restore DSA, note we don't care about TEMP - MOVE MEMORY 4, saved_dsa, addr_dsa - -at 0x0000003e : */ 0xc0000004,0x00000000,0x00000000, -/* - - - - JUMP jump_temp - -at 0x00000041 : */ 0x80080000,0x000009c4, -/* - - -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 LCRC TO SFBR ; LCRC has our ID and his ID bits set - -at 0x00000043 : */ 0x72230000,0x00000000, -/* - JUMP REL (wrong_dsa), IF NOT dsa_temp_target, AND MASK 0x80 - -at 0x00000045 : */ 0x80848000,0x00ffff50, -/* - - - - - -; -; Hack - move to scratch first, since SFBR is not writeable -; via the CPU and hence a MOVE MEMORY instruction. -; - - MOVE MEMORY 1, reselected_identify, addr_scratch - -at 0x00000047 : */ 0xc0000001,0x00000000,0x00000000, -/* - - - ; BIG ENDIAN ON MVME16x - MOVE SCRATCH3 TO SFBR - -at 0x0000004a : */ 0x72370000,0x00000000, -/* - - - -; FIXME : we need to accommodate bit fielded and binary here for '7xx/'8xx chips -; Are you sure about that? richard@sleepie.demon.co.uk - JUMP REL (wrong_dsa), IF NOT dsa_temp_lun, AND MASK 0xf8 - -at 0x0000004c : */ 0x8084f800,0x00ffff34, -/* -; 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_patch + 4 - -at 0x0000004e : */ 0xc0000004,0x00000000,0x000007e8, -/* - CALL reselected_ok - -at 0x00000051 : */ 0x88080000,0x00000798, -/* - -; Restore DSA following memory moves in reselected_ok -; dsa_temp_sync doesn't really care about DSA, but it has an -; optional debug INT so a valid DSA is a good idea. - MOVE MEMORY 4, saved_dsa, addr_dsa - -at 0x00000053 : */ 0xc0000004,0x00000000,0x00000000, -/* - - CALL dsa_temp_sync - -at 0x00000056 : */ 0x88080000,0x00000000, -/* -; Release ACK on the IDENTIFY message _after_ we've set the synchronous -; transfer parameters! - CLEAR ACK - -at 0x00000058 : */ 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 0x0000005a : */ 0x88880000,0x00ffff68, -/* - RETURN - -at 0x0000005c : */ 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 containing - ; 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 - -ABSOLUTE saved_dsa = 0x0 -ABSOLUTE emulfly = 0x0 -ABSOLUTE addr_dsa = 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_norm_emulateintfly = 0x02060000 ; 53C710 Emulated intfly -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 -; - - ; 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. -; -; DISCONNECT messages are handled by moving the command -; to the reconnect_dsa_queue. - -; NOTE: DSA should be valid when we get here - we cannot save both it -; and TEMP in this routine. - -; -; 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 0x000000ff : */ 0x7e1cf800,0x00000000, -/* - MOVE TEMP1 + 0xff TO TEMP1 WITH CARRY - -at 0x00000101 : */ 0x7f1dff00,0x00000000, -/* - MOVE TEMP2 + 0xff TO TEMP2 WITH CARRY - -at 0x00000103 : */ 0x7f1eff00,0x00000000, -/* - MOVE TEMP3 + 0xff TO TEMP3 WITH CARRY - -at 0x00000105 : */ 0x7f1fff00,0x00000000, -/* - -ENTRY msg_in -msg_in: - MOVE 1, msg_buf, WHEN MSG_IN - -at 0x00000107 : */ 0x0f000001,0x00000000, -/* - -munge_msg: - JUMP munge_extended, IF 0x01 ; EXTENDED MESSAGE - -at 0x00000109 : */ 0x800c0001,0x00000574, -/* - JUMP munge_2, IF 0x20, AND MASK 0xdf ; two byte message - -at 0x0000010b : */ 0x800cdf20,0x00000464, -/* -; -; 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 0x0000010d : */ 0x800c0002,0x0000046c, -/* - JUMP munge_restore_pointers, IF 0x03 ; RESTORE POINTERS - -at 0x0000010f : */ 0x800c0003,0x00000518, -/* - JUMP munge_disconnect, IF 0x04 ; DISCONNECT - -at 0x00000111 : */ 0x800c0004,0x0000056c, -/* - INT int_msg_1, IF 0x07 ; MESSAGE REJECT - -at 0x00000113 : */ 0x980c0007,0x01020000, -/* - INT int_msg_1, IF 0x0f ; INITIATE RECOVERY - -at 0x00000115 : */ 0x980c000f,0x01020000, -/* - - - - JUMP reject_message - -at 0x00000117 : */ 0x80080000,0x00000604, -/* - -munge_2: - JUMP reject_message - -at 0x00000119 : */ 0x80080000,0x00000604, |