?? ncr.c
字號:
SCR_REG_REG (scntl2, SCR_AND, 0x7f), 0, SCR_CLR (SCR_ACK|SCR_ATN), 0, /* ** Wait for the disconnect. */ SCR_WAIT_DISC, 0, /* ** Profiling: ** Set a time stamp, ** and count the disconnects. */ SCR_COPY (sizeof (struct timeval)), KVAR (KVAR_TIME), NADDR (header.stamp.disconnect), SCR_COPY (4), NADDR (disc_phys), RADDR (temp), SCR_REG_REG (temp, SCR_ADD, 0x01), 0, SCR_COPY (4), RADDR (temp), NADDR (disc_phys), /* ** Status is: DISCONNECTED. */ SCR_LOAD_REG (HS_REG, HS_DISCONNECT), 0, SCR_JUMP, PADDR (cleanup),}/*-------------------------< MSG_OUT >-------------------*/,{ /* ** The target requests a message. */ SCR_MOVE_ABS (1) ^ SCR_MSG_OUT, NADDR (msgout), SCR_COPY (1), RADDR (sfbr), NADDR (lastmsg), /* ** If it was no ABORT message ... */ SCR_JUMP ^ IFTRUE (DATA (M_ABORT)), PADDRH (msg_out_abort), /* ** ... wait for the next phase ** if it's a message out, send it again, ... */ SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_OUT)), PADDR (msg_out),}/*-------------------------< MSG_OUT_DONE >--------------*/,{ /* ** ... else clear the message ... */ SCR_LOAD_REG (scratcha, M_NOOP), 0, SCR_COPY (4), RADDR (scratcha), NADDR (msgout), /* ** ... and process the next phase */ SCR_JUMP, PADDR (dispatch),}/*------------------------< BADGETCC >---------------------*/,{ /* ** If SIGP was set, clear it and try again. */ SCR_FROM_REG (ctest2), 0, SCR_JUMP ^ IFTRUE (MASK (CSIGP,CSIGP)), PADDRH (getcc2), SCR_INT, SIR_SENSE_FAILED,}/*-------------------------< RESELECT >--------------------*/,{ /* ** This NOP will be patched with LED OFF ** SCR_REG_REG (gpreg, SCR_OR, 0x01) */ SCR_NO_OP, 0, /* ** make the DSA invalid. */ SCR_LOAD_REG (dsa, 0xff), 0, SCR_CLR (SCR_TRG), 0, /* ** Sleep waiting for a reselection. ** If SIGP is set, special treatment. ** ** Zu allem bereit .. */ SCR_WAIT_RESEL, PADDR(reselect2),}/*-------------------------< RESELECT1 >--------------------*/,{ /* ** This NOP will be patched with LED ON ** SCR_REG_REG (gpreg, SCR_AND, 0xfe) */ SCR_NO_OP, 0, /* ** ... zu nichts zu gebrauchen ? ** ** load the target id into the SFBR ** and jump to the control block. ** ** Look at the declarations of ** - struct ncb ** - struct tcb ** - struct lcb ** - struct ccb ** to understand what's going on. */ SCR_REG_SFBR (ssid, SCR_AND, 0x8F), 0, SCR_TO_REG (ctest0), 0, SCR_JUMP, NADDR (jump_tcb),}/*-------------------------< RESELECT2 >-------------------*/,{ /* ** This NOP will be patched with LED ON ** SCR_REG_REG (gpreg, SCR_AND, 0xfe) */ SCR_NO_OP, 0, /* ** If it's not connected :( ** -> interrupted by SIGP bit. ** Jump to start. */ SCR_FROM_REG (ctest2), 0, SCR_JUMP ^ IFTRUE (MASK (CSIGP,CSIGP)), PADDR (start), SCR_JUMP, PADDR (reselect),}/*-------------------------< RESEL_TMP >-------------------*/,{ /* ** The return address in TEMP ** is in fact the data structure address, ** so copy it to the DSA register. */ SCR_COPY (4), RADDR (temp), RADDR (dsa), SCR_JUMP, PADDR (prepare),}/*-------------------------< RESEL_LUN >-------------------*/,{ /* ** come back to this point ** to get an IDENTIFY message ** Wait for a msg_in phase. *//*<<<*/ SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_IN)), 48, /* ** message phase ** It's not a sony, it's a trick: ** read the data without acknowledging it. */ SCR_FROM_REG (sbdl), 0,/*<<<*/ SCR_JUMPR ^ IFFALSE (MASK (M_IDENTIFY, 0x98)), 32, /* ** It WAS an Identify message. ** get it and ack it! */ SCR_MOVE_ABS (1) ^ SCR_MSG_IN, NADDR (msgin), SCR_CLR (SCR_ACK), 0, /* ** Mask out the lun. */ SCR_REG_REG (sfbr, SCR_AND, 0x07), 0, SCR_RETURN, 0, /* ** No message phase or no IDENTIFY message: ** return 0. *//*>>>*/ SCR_LOAD_SFBR (0), 0, SCR_RETURN, 0,}/*-------------------------< RESEL_TAG >-------------------*/,{ /* ** come back to this point ** to get a SIMPLE_TAG message ** Wait for a MSG_IN phase. *//*<<<*/ SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_IN)), 64, /* ** message phase ** It's a trick - read the data ** without acknowledging it. */ SCR_FROM_REG (sbdl), 0,/*<<<*/ SCR_JUMPR ^ IFFALSE (DATA (M_SIMPLE_TAG)), 48, /* ** It WAS a SIMPLE_TAG message. ** get it and ack it! */ SCR_MOVE_ABS (1) ^ SCR_MSG_IN, NADDR (msgin), SCR_CLR (SCR_ACK), 0, /* ** Wait for the second byte (the tag) *//*<<<*/ SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_IN)), 24, /* ** Get it and ack it! */ SCR_MOVE_ABS (1) ^ SCR_MSG_IN, NADDR (msgin), SCR_CLR (SCR_ACK|SCR_CARRY), 0, SCR_RETURN, 0, /* ** No message phase or no SIMPLE_TAG message ** or no second byte: return 0. *//*>>>*/ SCR_LOAD_SFBR (0), 0, SCR_SET (SCR_CARRY), 0, SCR_RETURN, 0,}/*-------------------------< DATA_IN >--------------------*/,{/*** Because the size depends on the** #define MAX_SCATTER parameter,** it is filled in at runtime.**** SCR_JUMP ^ IFFALSE (WHEN (SCR_DATA_IN)),** PADDR (no_data),** SCR_COPY (sizeof (struct timeval)),** KVAR (KVAR_TIME),** NADDR (header.stamp.data),** SCR_MOVE_TBL ^ SCR_DATA_IN,** offsetof (struct dsb, data[ 0]),**** ##===========< i=1; i<MAX_SCATTER >=========** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN)),** || PADDR (checkatn),** || SCR_MOVE_TBL ^ SCR_DATA_IN,** || offsetof (struct dsb, data[ i]),** ##==========================================**** SCR_CALL,** PADDR (checkatn),** SCR_JUMP,** PADDR (no_data),*/0}/*-------------------------< DATA_OUT >-------------------*/,{/*** Because the size depends on the** #define MAX_SCATTER parameter,** it is filled in at runtime.**** SCR_JUMP ^ IFFALSE (WHEN (SCR_DATA_OUT)),** PADDR (no_data),** SCR_COPY (sizeof (struct timeval)),** KVAR (KVAR_TIME),** NADDR (header.stamp.data),** SCR_MOVE_TBL ^ SCR_DATA_OUT,** offsetof (struct dsb, data[ 0]),**** ##===========< i=1; i<MAX_SCATTER >=========** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT)),** || PADDR (dispatch),** || SCR_MOVE_TBL ^ SCR_DATA_OUT,** || offsetof (struct dsb, data[ i]),** ##==========================================**** SCR_CALL,** PADDR (dispatch),** SCR_JUMP,** PADDR (no_data),****---------------------------------------------------------*/#ifdef __OpenBSD__0#else(u_long)&ident#endif}/*--------------------------------------------------------*/};static struct scripth scripth0 = {/*-------------------------< TRYLOOP >---------------------*/{/*** Load an entry of the start queue into dsa** and try to start it by jumping to TRYSEL.**** Because the size depends on the** #define MAX_START parameter, it is filled** in at runtime.****-----------------------------------------------------------**** ##===========< I=0; i<MAX_START >===========** || SCR_COPY (4),** || NADDR (squeue[i]),** || RADDR (dsa),** || SCR_CALL,** || PADDR (trysel),** ##==========================================**** SCR_JUMP,** PADDRH(tryloop),****-----------------------------------------------------------*/0}/*-------------------------< MSG_PARITY >---------------*/,{ /* ** count it */ SCR_REG_REG (PS_REG, SCR_ADD, 0x01), 0, /* ** send a "message parity error" message. */ SCR_LOAD_REG (scratcha, M_PARITY), 0, SCR_JUMP, PADDR (setmsg),}/*-------------------------< MSG_REJECT >---------------*/,{ /* ** If a negotiation was in progress, ** negotiation failed. */ SCR_FROM_REG (HS_REG), 0, SCR_INT ^ IFTRUE (DATA (HS_NEGOTIATE)), SIR_NEGO_FAILED, /* ** else make host log this message */ SCR_INT ^ IFFALSE (DATA (HS_NEGOTIATE)), SIR_REJECT_RECEIVED, SCR_JUMP, PADDR (clrack),}/*-------------------------< MSG_IGN_RESIDUE >----------*/,{ /* ** Terminate cycle */ SCR_CLR (SCR_ACK), 0, SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)), PADDR (dispatch), /* ** get residue size. */ SCR_MOVE_ABS (1) ^ SCR_MSG_IN, NADDR (msgin[1]), /* ** Check for message parity error. */ SCR_TO_REG (scratcha), 0, SCR_FROM_REG (socl), 0, SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)), PADDRH (msg_parity), SCR_FROM_REG (scratcha), 0, /* ** Size is 0 .. ignore message. */ SCR_JUMP ^ IFTRUE (DATA (0)), PADDR (clrack), /* ** Size is not 1 .. have to interrupt. *//*<<<*/ SCR_JUMPR ^ IFFALSE (DATA (1)), 40, /* ** Check for residue byte in swide register */ SCR_FROM_REG (scntl2), 0,/*<<<*/ SCR_JUMPR ^ IFFALSE (MASK (WSR, WSR)), 16, /* ** There IS data in the swide register. ** Discard it. */ SCR_REG_REG (scntl2, SCR_OR, WSR), 0, SCR_JUMP, PADDR (clrack), /* ** Load again the size to the sfbr register. *//*>>>*/ SCR_FROM_REG (scratcha), 0,/*>>>*/ SCR_INT, SIR_IGN_RESIDUE, SCR_JUMP, PADDR (clrack),}/*-------------------------< MSG_EXTENDED >-------------*/,{ /* ** Terminate cycle */ SCR_CLR (SCR_ACK), 0, SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)), PADDR (dispatch), /* ** get length. */ SCR_MOVE_ABS (1) ^ SCR_MSG_IN, NADDR (msgin[1]), /* ** Check for message parity error. */ SCR_TO_REG (scratcha), 0, SCR_FROM_REG (socl), 0, SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)), PADDRH (msg_parity), SCR_FROM_REG (scratcha), 0, /* */ SCR_JUMP ^ IFTRUE (DATA (3)), PADDRH (msg_ext_3), SCR_JUMP ^ IFFALSE (DATA (2)), PADDR (msg_bad),}/*-------------------------< MSG_EXT_2 >----------------*/,{ SCR_CLR (SCR_ACK), 0, SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)), PADDR (dispatch), /* ** get extended message code. */ SCR_MOVE_ABS (1) ^ SCR_MSG_IN, NADDR (msgin[2]), /* ** Check for message parity error. */ SCR_TO_REG (scratcha), 0, SCR_FROM_REG (socl), 0, SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)), PADDRH (msg_parity), SCR_FROM_REG (scratcha), 0, SCR_JUMP ^ IFTRUE (DATA (M_X_WIDE_REQ)), PADDRH (msg_wdtr), /* ** unknown extended message */ SCR_JUMP, PADDR (msg_bad)}/*-------------------------< MSG_WDTR >-----------------*/,{ SCR_CLR (SCR_ACK), 0, SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)), PADDR (dispatch), /* ** get data bus width */ SCR_MOVE_ABS (1) ^ SCR_MSG_IN, NADDR (msgin[3]), SCR_FROM_REG (socl), 0, SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)), PADDRH (msg_parity), /* ** let the host do the real work. */ SCR_INT, SIR_NEGO_WIDE, /* ** let the target fetch our answer. */ SCR_SET (SCR_ATN), 0, SCR_CLR (SCR_ACK), 0, SCR_INT ^ IFFALSE (WHEN (SCR_MSG_OUT)), SIR_NEGO_PROTO, /* ** Send the M_X_WIDE_REQ */ SCR_MOVE_ABS (4) ^ SCR_MSG_OUT, NADDR (msgout), SCR_CLR (SCR_ATN), 0, SCR_COPY (1), RADDR (sfbr), NADDR (lastmsg), SCR_JUMP, PADDR (msg_out_done),}/*-------------------------< MSG_EXT_3 >----------------*/,{ SCR_CLR (SCR_ACK), 0, SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)), PADDR (dispatch), /* ** get extended message code. */ SCR_MOVE_ABS (1) ^ SCR_MSG_IN, NADDR (msgin[2]), /* ** Check for message parity error. */ SCR_TO_REG (scratcha), 0, SCR_FROM_REG (socl), 0, SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)), PADDRH (msg_parity), SCR_FROM_REG (scratcha), 0, SCR_JUMP ^ IFTRUE (DATA (M_X_SYNC_REQ)), PADDRH (msg_sdtr), /* ** unknown extended message */ SCR_JUMP, PADDR (msg_bad)}/*-------------------------< MSG_SDTR >-----------------*/,{ SCR_CLR (SCR_ACK), 0, SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)), PADDR (dispatch), /* ** get period and offset */ SCR_MOVE_ABS (2) ^ SCR_MSG_IN, NADDR (msgin[3]), SCR_FROM_REG (socl), 0, SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)), PADDRH (msg_parity), /* ** let the host do the real work. */ SCR_INT, SIR_NEGO_SYNC, /* ** let the target fetch our answer. */ SCR_SET (SCR_ATN), 0, SCR_CLR (SCR_ACK), 0, SCR_INT ^ IFFALSE (WHEN (SCR_MSG_OUT)), SIR_NEGO_PROTO, /* ** Send the M_X_SYNC_REQ
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -