412 lines
11 KiB
Text
412 lines
11 KiB
Text
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; Script for the NCR (or symbios) 53c700 and 53c700-66 chip
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;
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; Copyright (C) 2001 James.Bottomley@HansenPartnership.com
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;;-----------------------------------------------------------------------------
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;;
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;; This program is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2 of the License, or
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;; (at your option) any later version.
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;;
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;;
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;; You should have received a copy of the GNU General Public License
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;; along with this program; if not, write to the Free Software
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;; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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;;
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;;-----------------------------------------------------------------------------
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;
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; This script is designed to be modified for the particular command in
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; operation. The particular variables pertaining to the commands are:
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;
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ABSOLUTE Device_ID = 0 ; ID of target for command
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ABSOLUTE MessageCount = 0 ; Number of bytes in message
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ABSOLUTE MessageLocation = 0 ; Addr of message
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ABSOLUTE CommandCount = 0 ; Number of bytes in command
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ABSOLUTE CommandAddress = 0 ; Addr of Command
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ABSOLUTE StatusAddress = 0 ; Addr to receive status return
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ABSOLUTE ReceiveMsgAddress = 0 ; Addr to receive msg
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;
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; This is the magic component for handling scatter-gather. Each of the
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; SG components is preceded by a script fragment which moves the
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; necessary amount of data and jumps to the next SG segment. The final
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; SG segment jumps back to . However, this address is the first SG script
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; segment.
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;
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ABSOLUTE SGScriptStartAddress = 0
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; The following represent status interrupts we use 3 hex digits for
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; this: 0xPRS where
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; P:
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ABSOLUTE AFTER_SELECTION = 0x100
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ABSOLUTE BEFORE_CMD = 0x200
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ABSOLUTE AFTER_CMD = 0x300
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ABSOLUTE AFTER_STATUS = 0x400
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ABSOLUTE AFTER_DATA_IN = 0x500
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ABSOLUTE AFTER_DATA_OUT = 0x600
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ABSOLUTE DURING_DATA_IN = 0x700
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; R:
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ABSOLUTE NOT_MSG_OUT = 0x10
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ABSOLUTE UNEXPECTED_PHASE = 0x20
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ABSOLUTE NOT_MSG_IN = 0x30
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ABSOLUTE UNEXPECTED_MSG = 0x40
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ABSOLUTE MSG_IN = 0x50
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ABSOLUTE SDTR_MSG_R = 0x60
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ABSOLUTE REJECT_MSG_R = 0x70
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ABSOLUTE DISCONNECT = 0x80
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ABSOLUTE MSG_OUT = 0x90
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ABSOLUTE WDTR_MSG_R = 0xA0
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; S:
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ABSOLUTE GOOD_STATUS = 0x1
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; Combinations, since the script assembler can't process |
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ABSOLUTE NOT_MSG_OUT_AFTER_SELECTION = 0x110
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ABSOLUTE UNEXPECTED_PHASE_BEFORE_CMD = 0x220
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ABSOLUTE UNEXPECTED_PHASE_AFTER_CMD = 0x320
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ABSOLUTE NOT_MSG_IN_AFTER_STATUS = 0x430
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ABSOLUTE GOOD_STATUS_AFTER_STATUS = 0x401
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ABSOLUTE UNEXPECTED_PHASE_AFTER_DATA_IN = 0x520
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ABSOLUTE UNEXPECTED_PHASE_AFTER_DATA_OUT = 0x620
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ABSOLUTE UNEXPECTED_MSG_BEFORE_CMD = 0x240
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ABSOLUTE MSG_IN_BEFORE_CMD = 0x250
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ABSOLUTE MSG_IN_AFTER_CMD = 0x350
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ABSOLUTE SDTR_MSG_BEFORE_CMD = 0x260
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ABSOLUTE REJECT_MSG_BEFORE_CMD = 0x270
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ABSOLUTE DISCONNECT_AFTER_CMD = 0x380
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ABSOLUTE SDTR_MSG_AFTER_CMD = 0x360
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ABSOLUTE WDTR_MSG_AFTER_CMD = 0x3A0
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ABSOLUTE MSG_IN_AFTER_STATUS = 0x440
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ABSOLUTE DISCONNECT_AFTER_DATA = 0x580
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ABSOLUTE MSG_IN_AFTER_DATA_IN = 0x550
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ABSOLUTE MSG_IN_AFTER_DATA_OUT = 0x650
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ABSOLUTE MSG_OUT_AFTER_DATA_IN = 0x590
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ABSOLUTE DATA_IN_AFTER_DATA_IN = 0x5a0
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ABSOLUTE MSG_IN_DURING_DATA_IN = 0x750
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ABSOLUTE DISCONNECT_DURING_DATA = 0x780
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;
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; Other interrupt conditions
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;
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ABSOLUTE RESELECTED_DURING_SELECTION = 0x1000
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ABSOLUTE COMPLETED_SELECTION_AS_TARGET = 0x1001
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ABSOLUTE RESELECTION_IDENTIFIED = 0x1003
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;
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; Fatal interrupt conditions. If you add to this, also add to the
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; array of corresponding messages
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;
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ABSOLUTE FATAL = 0x2000
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ABSOLUTE FATAL_UNEXPECTED_RESELECTION_MSG = 0x2000
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ABSOLUTE FATAL_SEND_MSG = 0x2001
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ABSOLUTE FATAL_NOT_MSG_IN_AFTER_SELECTION = 0x2002
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ABSOLUTE FATAL_ILLEGAL_MSG_LENGTH = 0x2003
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ABSOLUTE DEBUG_INTERRUPT = 0x3000
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ABSOLUTE DEBUG_INTERRUPT1 = 0x3001
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ABSOLUTE DEBUG_INTERRUPT2 = 0x3002
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ABSOLUTE DEBUG_INTERRUPT3 = 0x3003
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ABSOLUTE DEBUG_INTERRUPT4 = 0x3004
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ABSOLUTE DEBUG_INTERRUPT5 = 0x3005
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ABSOLUTE DEBUG_INTERRUPT6 = 0x3006
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;
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; SCSI Messages we interpret in the script
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;
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ABSOLUTE COMMAND_COMPLETE_MSG = 0x00
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ABSOLUTE EXTENDED_MSG = 0x01
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ABSOLUTE SDTR_MSG = 0x01
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ABSOLUTE SAVE_DATA_PTRS_MSG = 0x02
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ABSOLUTE RESTORE_DATA_PTRS_MSG = 0x03
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ABSOLUTE WDTR_MSG = 0x03
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ABSOLUTE DISCONNECT_MSG = 0x04
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ABSOLUTE REJECT_MSG = 0x07
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ABSOLUTE PARITY_ERROR_MSG = 0x09
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ABSOLUTE SIMPLE_TAG_MSG = 0x20
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ABSOLUTE IDENTIFY_MSG = 0x80
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ABSOLUTE IDENTIFY_MSG_MASK = 0x7F
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ABSOLUTE TWO_BYTE_MSG = 0x20
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ABSOLUTE TWO_BYTE_MSG_MASK = 0x0F
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; This is where the script begins
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ENTRY StartUp
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StartUp:
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SELECT ATN Device_ID, Reselect
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JUMP Finish, WHEN STATUS
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JUMP SendIdentifyMsg, IF MSG_OUT
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INT NOT_MSG_OUT_AFTER_SELECTION
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Reselect:
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WAIT RESELECT SelectedAsTarget
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INT RESELECTED_DURING_SELECTION, WHEN MSG_IN
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INT FATAL_NOT_MSG_IN_AFTER_SELECTION
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ENTRY GetReselectionData
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GetReselectionData:
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MOVE 1, ReceiveMsgAddress, WHEN MSG_IN
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INT RESELECTION_IDENTIFIED
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ENTRY GetReselectionWithTag
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GetReselectionWithTag:
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MOVE 3, ReceiveMsgAddress, WHEN MSG_IN
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INT RESELECTION_IDENTIFIED
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ENTRY SelectedAsTarget
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SelectedAsTarget:
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; Basically tell the selecting device that there's nothing here
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SET TARGET
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DISCONNECT
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CLEAR TARGET
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INT COMPLETED_SELECTION_AS_TARGET
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;
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; These are the messaging entries
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;
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; Send a message. Message count should be correctly patched
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ENTRY SendMessage
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SendMessage:
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MOVE MessageCount, MessageLocation, WHEN MSG_OUT
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ResumeSendMessage:
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RETURN, WHEN NOT MSG_OUT
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INT FATAL_SEND_MSG
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ENTRY SendMessagePhaseMismatch
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SendMessagePhaseMismatch:
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CLEAR ACK
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JUMP ResumeSendMessage
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;
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; Receive a message. Need to identify the message to
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; receive it correctly
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ENTRY ReceiveMessage
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ReceiveMessage:
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MOVE 1, ReceiveMsgAddress, WHEN MSG_IN
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;
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; Use this entry if we've just tried to look at the first byte
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; of the message and want to process it further
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ProcessReceiveMessage:
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JUMP ReceiveExtendedMessage, IF EXTENDED_MSG
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RETURN, IF NOT TWO_BYTE_MSG, AND MASK TWO_BYTE_MSG_MASK
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CLEAR ACK
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MOVE 1, ReceiveMsgAddress + 1, WHEN MSG_IN
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RETURN
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ReceiveExtendedMessage:
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CLEAR ACK
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MOVE 1, ReceiveMsgAddress + 1, WHEN MSG_IN
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JUMP Receive1Byte, IF 0x01
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JUMP Receive2Byte, IF 0x02
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JUMP Receive3Byte, IF 0x03
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JUMP Receive4Byte, IF 0x04
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JUMP Receive5Byte, IF 0x05
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INT FATAL_ILLEGAL_MSG_LENGTH
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Receive1Byte:
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CLEAR ACK
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MOVE 1, ReceiveMsgAddress + 2, WHEN MSG_IN
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RETURN
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Receive2Byte:
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CLEAR ACK
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MOVE 2, ReceiveMsgAddress + 2, WHEN MSG_IN
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RETURN
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Receive3Byte:
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CLEAR ACK
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MOVE 3, ReceiveMsgAddress + 2, WHEN MSG_IN
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RETURN
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Receive4Byte:
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CLEAR ACK
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MOVE 4, ReceiveMsgAddress + 2, WHEN MSG_IN
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RETURN
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Receive5Byte:
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CLEAR ACK
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MOVE 5, ReceiveMsgAddress + 2, WHEN MSG_IN
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RETURN
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;
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; Come here from the message processor to ignore the message
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;
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ENTRY IgnoreMessage
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IgnoreMessage:
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CLEAR ACK
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RETURN
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;
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; Come here to send a reply to a message
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;
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ENTRY SendMessageWithATN
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SendMessageWithATN:
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SET ATN
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CLEAR ACK
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JUMP SendMessage
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SendIdentifyMsg:
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CALL SendMessage
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CLEAR ATN
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IgnoreMsgBeforeCommand:
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CLEAR ACK
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ENTRY SendCommand
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SendCommand:
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JUMP Finish, WHEN STATUS
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JUMP MsgInBeforeCommand, IF MSG_IN
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INT UNEXPECTED_PHASE_BEFORE_CMD, IF NOT CMD
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MOVE CommandCount, CommandAddress, WHEN CMD
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ResumeSendCommand:
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JUMP Finish, WHEN STATUS
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JUMP MsgInAfterCmd, IF MSG_IN
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JUMP DataIn, IF DATA_IN
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JUMP DataOut, IF DATA_OUT
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INT UNEXPECTED_PHASE_AFTER_CMD
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IgnoreMsgDuringData:
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CLEAR ACK
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; fall through to MsgInDuringData
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Entry MsgInDuringData
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MsgInDuringData:
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;
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; Could be we have nothing more to transfer
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;
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JUMP Finish, WHEN STATUS
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MOVE 1, ReceiveMsgAddress, WHEN MSG_IN
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JUMP DisconnectDuringDataIn, IF DISCONNECT_MSG
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JUMP IgnoreMsgDuringData, IF SAVE_DATA_PTRS_MSG
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JUMP IgnoreMsgDuringData, IF RESTORE_DATA_PTRS_MSG
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INT MSG_IN_DURING_DATA_IN
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MsgInAfterCmd:
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MOVE 1, ReceiveMsgAddress, WHEN MSG_IN
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JUMP DisconnectAfterCmd, IF DISCONNECT_MSG
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JUMP IgnoreMsgInAfterCmd, IF SAVE_DATA_PTRS_MSG
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JUMP IgnoreMsgInAfterCmd, IF RESTORE_DATA_PTRS_MSG
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CALL ProcessReceiveMessage
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INT MSG_IN_AFTER_CMD
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CLEAR ACK
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JUMP ResumeSendCommand
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IgnoreMsgInAfterCmd:
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CLEAR ACK
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JUMP ResumeSendCommand
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DisconnectAfterCmd:
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CLEAR ACK
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WAIT DISCONNECT
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ENTRY Disconnect1
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Disconnect1:
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INT DISCONNECT_AFTER_CMD
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ENTRY Disconnect2
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Disconnect2:
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; We return here after a reselection
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CLEAR ACK
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JUMP ResumeSendCommand
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MsgInBeforeCommand:
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MOVE 1, ReceiveMsgAddress, WHEN MSG_IN
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JUMP IgnoreMsgBeforeCommand, IF SAVE_DATA_PTRS_MSG
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JUMP IgnoreMsgBeforeCommand, IF RESTORE_DATA_PTRS_MSG
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CALL ProcessReceiveMessage
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INT MSG_IN_BEFORE_CMD
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CLEAR ACK
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JUMP SendCommand
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DataIn:
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CALL SGScriptStartAddress
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ResumeDataIn:
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JUMP Finish, WHEN STATUS
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JUMP MsgInAfterDataIn, IF MSG_IN
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JUMP DataInAfterDataIn, if DATA_IN
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INT MSG_OUT_AFTER_DATA_IN, if MSG_OUT
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INT UNEXPECTED_PHASE_AFTER_DATA_IN
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DataInAfterDataIn:
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INT DATA_IN_AFTER_DATA_IN
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JUMP ResumeDataIn
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DataOut:
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CALL SGScriptStartAddress
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ResumeDataOut:
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JUMP Finish, WHEN STATUS
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JUMP MsgInAfterDataOut, IF MSG_IN
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INT UNEXPECTED_PHASE_AFTER_DATA_OUT
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MsgInAfterDataIn:
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MOVE 1, ReceiveMsgAddress, WHEN MSG_IN
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JUMP DisconnectAfterDataIn, IF DISCONNECT_MSG
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JUMP IgnoreMsgAfterData, IF SAVE_DATA_PTRS_MSG
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JUMP IgnoreMsgAfterData, IF RESTORE_DATA_PTRS_MSG
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CALL ProcessReceiveMessage
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INT MSG_IN_AFTER_DATA_IN
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CLEAR ACK
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JUMP ResumeDataIn
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DisconnectDuringDataIn:
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CLEAR ACK
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WAIT DISCONNECT
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ENTRY Disconnect3
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Disconnect3:
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INT DISCONNECT_DURING_DATA
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ENTRY Disconnect4
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Disconnect4:
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; we return here after a reselection
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CLEAR ACK
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JUMP ResumeSendCommand
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DisconnectAfterDataIn:
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CLEAR ACK
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WAIT DISCONNECT
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ENTRY Disconnect5
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Disconnect5:
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INT DISCONNECT_AFTER_DATA
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ENTRY Disconnect6
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Disconnect6:
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; we return here after a reselection
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CLEAR ACK
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JUMP ResumeDataIn
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MsgInAfterDataOut:
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MOVE 1, ReceiveMsgAddress, WHEN MSG_IN
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|
JUMP DisconnectAfterDataOut, if DISCONNECT_MSG
|
||
|
|
JUMP IgnoreMsgAfterData, IF SAVE_DATA_PTRS_MSG
|
||
|
|
JUMP IgnoreMsgAfterData, IF RESTORE_DATA_PTRS_MSG
|
||
|
|
CALL ProcessReceiveMessage
|
||
|
|
INT MSG_IN_AFTER_DATA_OUT
|
||
|
|
CLEAR ACK
|
||
|
|
JUMP ResumeDataOut
|
||
|
|
|
||
|
|
IgnoreMsgAfterData:
|
||
|
|
CLEAR ACK
|
||
|
|
; Data in and out do the same thing on resume, so pick one
|
||
|
|
JUMP ResumeDataIn
|
||
|
|
|
||
|
|
DisconnectAfterDataOut:
|
||
|
|
CLEAR ACK
|
||
|
|
WAIT DISCONNECT
|
||
|
|
ENTRY Disconnect7
|
||
|
|
Disconnect7:
|
||
|
|
INT DISCONNECT_AFTER_DATA
|
||
|
|
ENTRY Disconnect8
|
||
|
|
Disconnect8:
|
||
|
|
; we return here after a reselection
|
||
|
|
CLEAR ACK
|
||
|
|
JUMP ResumeDataOut
|
||
|
|
|
||
|
|
Finish:
|
||
|
|
MOVE 1, StatusAddress, WHEN STATUS
|
||
|
|
INT NOT_MSG_IN_AFTER_STATUS, WHEN NOT MSG_IN
|
||
|
|
MOVE 1, ReceiveMsgAddress, WHEN MSG_IN
|
||
|
|
JUMP FinishCommandComplete, IF COMMAND_COMPLETE_MSG
|
||
|
|
CALL ProcessReceiveMessage
|
||
|
|
INT MSG_IN_AFTER_STATUS
|
||
|
|
ENTRY FinishCommandComplete
|
||
|
|
FinishCommandComplete:
|
||
|
|
CLEAR ACK
|
||
|
|
WAIT DISCONNECT
|
||
|
|
ENTRY Finish1
|
||
|
|
Finish1:
|
||
|
|
INT GOOD_STATUS_AFTER_STATUS
|
||
|
|
ENTRY Finish2
|
||
|
|
Finish2:
|
||
|
|
|