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53c700.scr
资源名称：SBC-2410X_kernel.tar.gz　[点击查看]
上传用户：lgb322
上传日期：2013-02-24
资源大小：30529k
文件大小：11k
源码类别：

嵌入式Linux

开发平台：

Unix_Linux

53c700.scr：源码内容
  1. ; Script for the NCR (or symbios) 53c700 and 53c700-66 chip
  2. ;
  3. ; Copyright (C) 2001 James.Bottomley@HansenPartnership.com
  4. ;;-----------------------------------------------------------------------------
  5. ;;  
  6. ;;  This program is free software; you can redistribute it and/or modify
  7. ;;  it under the terms of the GNU General Public License as published by
  8. ;;  the Free Software Foundation; either version 2 of the License, or
  9. ;;  (at your option) any later version.
  10. ;;
  11. ;;  This program is distributed in the hope that it will be useful,
  12. ;;  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13. ;;  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14. ;;  GNU General Public License for more details.
  15. ;;
  16. ;;  You should have received a copy of the GNU General Public License
  17. ;;  along with this program; if not, write to the Free Software
  18. ;;  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19. ;;
  20. ;;-----------------------------------------------------------------------------
  21. ;
  22. ; This script is designed to be modified for the particular command in
  23. ; operation.  The particular variables pertaining to the commands are:
  24. ;
  25. ABSOLUTE Device_ID = 0 ; ID of target for command
  26. ABSOLUTE MessageCount = 0 ; Number of bytes in message
  27. ABSOLUTE MessageLocation = 0 ; Addr of message
  28. ABSOLUTE CommandCount = 0 ; Number of bytes in command
  29. ABSOLUTE CommandAddress = 0 ; Addr of Command
  30. ABSOLUTE StatusAddress = 0 ; Addr to receive status return
  31. ABSOLUTE ReceiveMsgAddress = 0 ; Addr to receive msg
  32. ;
  33. ; This is the magic component for handling scatter-gather.  Each of the
  34. ; SG components is preceeded by a script fragment which moves the
  35. ; necessary amount of data and jumps to the next SG segment.  The final
  36. ; SG segment jumps back to .  However, this address is the first SG script
  37. ; segment.
  38. ;
  39. ABSOLUTE SGScriptStartAddress = 0
  41. ; The following represent status interrupts we use 3 hex digits for
  42. ; this: 0xPRS where 
  44. ; P:
  45. ABSOLUTE AFTER_SELECTION  = 0x100
  46. ABSOLUTE BEFORE_CMD  = 0x200
  47. ABSOLUTE AFTER_CMD  = 0x300
  48. ABSOLUTE AFTER_STATUS  = 0x400
  49. ABSOLUTE AFTER_DATA_IN = 0x500
  50. ABSOLUTE AFTER_DATA_OUT = 0x600
  51. ABSOLUTE DURING_DATA_IN = 0x700
  53. ; R:
  54. ABSOLUTE NOT_MSG_OUT  = 0x10
  55. ABSOLUTE UNEXPECTED_PHASE  = 0x20
  56. ABSOLUTE NOT_MSG_IN  = 0x30
  57. ABSOLUTE UNEXPECTED_MSG = 0x40
  58. ABSOLUTE MSG_IN = 0x50
  59. ABSOLUTE SDTR_MSG_R = 0x60
  60. ABSOLUTE REJECT_MSG_R = 0x70
  61. ABSOLUTE DISCONNECT = 0x80
  62. ABSOLUTE MSG_OUT = 0x90
  63. ABSOLUTE WDTR_MSG_R = 0xA0
  65. ; S:
  66. ABSOLUTE GOOD_STATUS  = 0x1
  68. ; Combinations, since the script assembler can't process |
  69. ABSOLUTE NOT_MSG_OUT_AFTER_SELECTION = 0x110
  70. ABSOLUTE UNEXPECTED_PHASE_BEFORE_CMD = 0x220
  71. ABSOLUTE UNEXPECTED_PHASE_AFTER_CMD = 0x320
  72. ABSOLUTE NOT_MSG_IN_AFTER_STATUS = 0x430
  73. ABSOLUTE GOOD_STATUS_AFTER_STATUS = 0x401
  74. ABSOLUTE UNEXPECTED_PHASE_AFTER_DATA_IN = 0x520
  75. ABSOLUTE UNEXPECTED_PHASE_AFTER_DATA_OUT = 0x620
  76. ABSOLUTE UNEXPECTED_MSG_BEFORE_CMD = 0x240
  77. ABSOLUTE MSG_IN_BEFORE_CMD = 0x250
  78. ABSOLUTE MSG_IN_AFTER_CMD = 0x350
  79. ABSOLUTE SDTR_MSG_BEFORE_CMD = 0x260
  80. ABSOLUTE REJECT_MSG_BEFORE_CMD = 0x270
  81. ABSOLUTE DISCONNECT_AFTER_CMD = 0x380
  82. ABSOLUTE SDTR_MSG_AFTER_CMD = 0x360
  83. ABSOLUTE WDTR_MSG_AFTER_CMD = 0x3A0
  84. ABSOLUTE MSG_IN_AFTER_STATUS = 0x440
  85. ABSOLUTE DISCONNECT_AFTER_DATA = 0x580
  86. ABSOLUTE MSG_IN_AFTER_DATA_IN = 0x550
  87. ABSOLUTE MSG_IN_AFTER_DATA_OUT = 0x650
  88. ABSOLUTE MSG_OUT_AFTER_DATA_IN = 0x590
  89. ABSOLUTE DATA_IN_AFTER_DATA_IN = 0x5a0
  90. ABSOLUTE MSG_IN_DURING_DATA_IN = 0x750
  91. ABSOLUTE DISCONNECT_DURING_DATA = 0x780
  93. ;
  94. ; Other interrupt conditions
  95. ; 
  96. ABSOLUTE RESELECTED_DURING_SELECTION = 0x1000
  97. ABSOLUTE COMPLETED_SELECTION_AS_TARGET = 0x1001
  98. ABSOLUTE RESELECTION_IDENTIFIED = 0x1003
  99. ;
  100. ; Fatal interrupt conditions.  If you add to this, also add to the
  101. ; array of corresponding messages
  102. ;
  103. ABSOLUTE FATAL = 0x2000
  104. ABSOLUTE FATAL_UNEXPECTED_RESELECTION_MSG = 0x2000
  105. ABSOLUTE FATAL_SEND_MSG = 0x2001
  106. ABSOLUTE FATAL_NOT_MSG_IN_AFTER_SELECTION = 0x2002
  107. ABSOLUTE FATAL_ILLEGAL_MSG_LENGTH = 0x2003
  109. ABSOLUTE DEBUG_INTERRUPT = 0x3000
  110. ABSOLUTE DEBUG_INTERRUPT1 = 0x3001
  111. ABSOLUTE DEBUG_INTERRUPT2 = 0x3002
  112. ABSOLUTE DEBUG_INTERRUPT3 = 0x3003
  113. ABSOLUTE DEBUG_INTERRUPT4 = 0x3004
  114. ABSOLUTE DEBUG_INTERRUPT5 = 0x3005
  115. ABSOLUTE DEBUG_INTERRUPT6 = 0x3006
  118. ;
  119. ; SCSI Messages we interpret in the script
  120. ;
  121. ABSOLUTE COMMAND_COMPLETE_MSG = 0x00
  122. ABSOLUTE EXTENDED_MSG = 0x01
  123. ABSOLUTE SDTR_MSG = 0x01
  124. ABSOLUTE SAVE_DATA_PTRS_MSG = 0x02
  125. ABSOLUTE RESTORE_DATA_PTRS_MSG = 0x03
  126. ABSOLUTE WDTR_MSG = 0x03
  127. ABSOLUTE DISCONNECT_MSG = 0x04
  128. ABSOLUTE REJECT_MSG = 0x07
  129. ABSOLUTE PARITY_ERROR_MSG = 0x09
  130. ABSOLUTE SIMPLE_TAG_MSG = 0x20
  131. ABSOLUTE IDENTIFY_MSG = 0x80
  132. ABSOLUTE IDENTIFY_MSG_MASK = 0x7F
  133. ABSOLUTE TWO_BYTE_MSG = 0x20
  134. ABSOLUTE TWO_BYTE_MSG_MASK = 0x0F
  136. ; This is where the script begins
  138. ENTRY StartUp
  140. StartUp:
  141. SELECT ATN Device_ID, Reselect
  142. JUMP Finish, WHEN STATUS
  143. JUMP SendIdentifyMsg, IF MSG_OUT
  144. INT NOT_MSG_OUT_AFTER_SELECTION
  146. Reselect:
  147. WAIT RESELECT SelectedAsTarget
  148. INT RESELECTED_DURING_SELECTION, WHEN MSG_IN
  149. INT FATAL_NOT_MSG_IN_AFTER_SELECTION
  151. ENTRY GetReselectionData
  152. GetReselectionData:
  153. MOVE 1, ReceiveMsgAddress, WHEN MSG_IN
  154. INT RESELECTION_IDENTIFIED
  156. ENTRY GetReselectionWithTag
  157. GetReselectionWithTag:
  158. MOVE 3, ReceiveMsgAddress, WHEN MSG_IN
  159. INT RESELECTION_IDENTIFIED
  161. ENTRY SelectedAsTarget
  162. SelectedAsTarget:
  163. ; Basically tell the selecting device that there's nothing here
  164. SET TARGET
  165. DISCONNECT
  166. CLEAR TARGET
  167. INT COMPLETED_SELECTION_AS_TARGET
  168. ;
  169. ; These are the messaging entries
  170. ;
  171. ; Send a message.  Message count should be correctly patched
  172. ENTRY SendMessage
  173. SendMessage:
  174. MOVE MessageCount, MessageLocation, WHEN MSG_OUT
  175. ResumeSendMessage:
  176. RETURN, WHEN NOT MSG_OUT
  177. INT FATAL_SEND_MSG
  179. ENTRY SendMessagePhaseMismatch
  180. SendMessagePhaseMismatch:
  181. CLEAR ACK
  182. JUMP ResumeSendMessage
  183. ;
  184. ; Receive a message.  Need to identify the message to
  185. ; receive it correctly
  186. ENTRY ReceiveMessage
  187. ReceiveMessage:
  188. MOVE 1, ReceiveMsgAddress, WHEN MSG_IN
  189. ;
  190. ; Use this entry if we've just tried to look at the first byte
  191. ; of the message and want to process it further
  192. ProcessReceiveMessage:
  193. JUMP ReceiveExtendedMessage, IF EXTENDED_MSG
  194. RETURN, IF NOT TWO_BYTE_MSG, AND MASK TWO_BYTE_MSG_MASK
  195. CLEAR ACK
  196. MOVE 1, ReceiveMsgAddress + 1, WHEN MSG_IN
  197. RETURN
  198. ReceiveExtendedMessage:
  199. CLEAR ACK
  200. MOVE 1, ReceiveMsgAddress + 1, WHEN MSG_IN
  201. JUMP Receive1Byte, IF 0x01
  202. JUMP Receive2Byte, IF 0x02
  203. JUMP Receive3Byte, IF 0x03
  204. JUMP Receive4Byte, IF 0x04
  205. JUMP Receive5Byte, IF 0x05
  206. INT FATAL_ILLEGAL_MSG_LENGTH
  207. Receive1Byte:
  208. CLEAR ACK
  209. MOVE 1, ReceiveMsgAddress + 2, WHEN MSG_IN
  210. RETURN
  211. Receive2Byte:
  212. CLEAR ACK
  213. MOVE 2, ReceiveMsgAddress + 2, WHEN MSG_IN
  214. RETURN
  215. Receive3Byte:
  216. CLEAR ACK
  217. MOVE 3, ReceiveMsgAddress + 2, WHEN MSG_IN
  218. RETURN
  219. Receive4Byte:
  220. CLEAR ACK
  221. MOVE 4, ReceiveMsgAddress + 2, WHEN MSG_IN
  222. RETURN
  223. Receive5Byte:
  224. CLEAR ACK
  225. MOVE 5, ReceiveMsgAddress + 2, WHEN MSG_IN
  226. RETURN
  227. ;
  228. ; Come here from the message processor to ignore the message
  229. ;
  230. ENTRY IgnoreMessage
  231. IgnoreMessage:
  232. CLEAR ACK
  233. RETURN
  234. ;
  235. ; Come here to send a reply to a message
  236. ;
  237. ENTRY SendMessageWithATN
  238. SendMessageWithATN:
  239. SET ATN
  240. CLEAR ACK
  241. JUMP SendMessage
  243. SendIdentifyMsg:
  244. CALL SendMessage
  245. CLEAR ATN
  247. IgnoreMsgBeforeCommand:
  248. CLEAR ACK
  249. ENTRY SendCommand
  250. SendCommand:
  251. JUMP Finish, WHEN STATUS
  252. JUMP MsgInBeforeCommand, IF MSG_IN
  253. INT UNEXPECTED_PHASE_BEFORE_CMD, IF NOT CMD
  254. MOVE CommandCount, CommandAddress, WHEN CMD
  255. ResumeSendCommand:
  256. JUMP Finish, WHEN STATUS
  257. JUMP MsgInAfterCmd, IF MSG_IN
  258. JUMP DataIn, IF DATA_IN
  259. JUMP DataOut, IF DATA_OUT
  260. INT UNEXPECTED_PHASE_AFTER_CMD
  262. IgnoreMsgDuringData:
  263. CLEAR ACK
  264. ; fall through to MsgInDuringData
  266. Entry MsgInDuringData
  267. MsgInDuringData:
  268. ;
  269. ; Could be we have nothing more to transfer
  270. ;
  271. JUMP Finish, WHEN STATUS
  272. MOVE 1, ReceiveMsgAddress, WHEN MSG_IN
  273. JUMP DisconnectDuringDataIn, IF DISCONNECT_MSG
  274. JUMP IgnoreMsgDuringData, IF SAVE_DATA_PTRS_MSG
  275. JUMP IgnoreMsgDuringData, IF RESTORE_DATA_PTRS_MSG
  276. INT MSG_IN_DURING_DATA_IN
  278. MsgInAfterCmd:
  279. MOVE 1, ReceiveMsgAddress, WHEN MSG_IN
  280. JUMP DisconnectAfterCmd, IF DISCONNECT_MSG
  281. JUMP IgnoreMsgInAfterCmd, IF SAVE_DATA_PTRS_MSG
  282. JUMP IgnoreMsgInAfterCmd, IF RESTORE_DATA_PTRS_MSG
  283. CALL ProcessReceiveMessage
  284. INT MSG_IN_AFTER_CMD
  285. CLEAR ACK
  286. JUMP ResumeSendCommand
  288. IgnoreMsgInAfterCmd:
  289. CLEAR ACK
  290. JUMP ResumeSendCommand
  292. DisconnectAfterCmd:
  293. CLEAR ACK
  294. WAIT DISCONNECT
  295. ENTRY Disconnect1
  296. Disconnect1:
  297. INT DISCONNECT_AFTER_CMD
  298. ENTRY Disconnect2
  299. Disconnect2:
  300. ; We return here after a reselection
  301. CLEAR ACK
  302. JUMP ResumeSendCommand
  304. MsgInBeforeCommand:
  305. MOVE 1, ReceiveMsgAddress, WHEN MSG_IN
  306. JUMP IgnoreMsgBeforeCommand, IF SAVE_DATA_PTRS_MSG
  307. JUMP IgnoreMsgBeforeCommand, IF RESTORE_DATA_PTRS_MSG
  308. CALL ProcessReceiveMessage
  309. INT MSG_IN_BEFORE_CMD
  310. CLEAR ACK
  311. JUMP SendCommand
  313. DataIn:
  314. CALL SGScriptStartAddress
  315. ResumeDataIn:
  316. JUMP Finish, WHEN STATUS
  317. JUMP MsgInAfterDataIn, IF MSG_IN
  318. JUMP DataInAfterDataIn, if DATA_IN
  319. INT MSG_OUT_AFTER_DATA_IN, if MSG_OUT
  320. INT UNEXPECTED_PHASE_AFTER_DATA_IN
  322. DataInAfterDataIn:
  323. INT DATA_IN_AFTER_DATA_IN
  324. JUMP ResumeDataIn
  326. DataOut:
  327. CALL SGScriptStartAddress
  328. ResumeDataOut:
  329. JUMP Finish, WHEN STATUS
  330. JUMP MsgInAfterDataOut, IF MSG_IN
  331. INT UNEXPECTED_PHASE_AFTER_DATA_OUT
  333. MsgInAfterDataIn:
  334. MOVE 1, ReceiveMsgAddress, WHEN MSG_IN
  335. JUMP DisconnectAfterDataIn, IF DISCONNECT_MSG
  336. JUMP IgnoreMsgAfterData, IF SAVE_DATA_PTRS_MSG
  337. JUMP IgnoreMsgAfterData, IF RESTORE_DATA_PTRS_MSG
  338. CALL ProcessReceiveMessage
  339. INT MSG_IN_AFTER_DATA_IN
  340. CLEAR ACK
  341. JUMP ResumeDataIn
  343. DisconnectDuringDataIn:
  344. CLEAR ACK
  345. WAIT DISCONNECT
  346. ENTRY Disconnect3
  347. Disconnect3:
  348. INT DISCONNECT_DURING_DATA
  349. ENTRY Disconnect4
  350. Disconnect4:
  351. ; we return here after a reselection
  352. CLEAR ACK
  353. JUMP ResumeSendCommand
  356. DisconnectAfterDataIn:
  357. CLEAR ACK
  358. WAIT DISCONNECT
  359. ENTRY Disconnect5
  360. Disconnect5:
  361. INT DISCONNECT_AFTER_DATA
  362. ENTRY Disconnect6
  363. Disconnect6:
  364. ; we return here after a reselection
  365. CLEAR ACK
  366. JUMP ResumeDataIn
  368. MsgInAfterDataOut:
  369. MOVE 1, ReceiveMsgAddress, WHEN MSG_IN
  370. JUMP DisconnectAfterDataOut, if DISCONNECT_MSG
  371. JUMP IgnoreMsgAfterData, IF SAVE_DATA_PTRS_MSG
  372. JUMP IgnoreMsgAfterData, IF RESTORE_DATA_PTRS_MSG
  373. CALL ProcessReceiveMessage
  374. INT MSG_IN_AFTER_DATA_OUT
  375. CLEAR ACK
  376. JUMP ResumeDataOut
  378. IgnoreMsgAfterData:
  379. CLEAR ACK
  380. ; Data in and out do the same thing on resume, so pick one
  381. JUMP ResumeDataIn
  383. DisconnectAfterDataOut:
  384. CLEAR ACK
  385. WAIT DISCONNECT
  386. ENTRY Disconnect7
  387. Disconnect7:
  388. INT DISCONNECT_AFTER_DATA
  389. ENTRY Disconnect8
  390. Disconnect8:
  391. ; we return here after a reselection
  392. CLEAR ACK
  393. JUMP ResumeDataOut
  395. Finish:
  396. MOVE 1, StatusAddress, WHEN STATUS
  397. INT NOT_MSG_IN_AFTER_STATUS, WHEN NOT MSG_IN
  398. MOVE 1, ReceiveMsgAddress, WHEN MSG_IN
  399. JUMP FinishCommandComplete, IF COMMAND_COMPLETE_MSG
  400. CALL ProcessReceiveMessage
  401. INT MSG_IN_AFTER_STATUS
  402. ENTRY FinishCommandComplete
  403. FinishCommandComplete:
  404. CLEAR ACK
  405. WAIT DISCONNECT
  406. ENTRY Finish1
  407. Finish1:
  408. INT GOOD_STATUS_AFTER_STATUS
  409. ENTRY Finish2
  410. Finish2: