/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Device driver for the SYMBIOS / LSILOGIC 53 C8XX and 53 C1010 family
* of PCI - SCSI IO processors .
*
* Copyright ( C ) 1999 - 2001 Gerard Roudier < groudier @ free . fr >
*
* This driver is derived from the Linux sym53c8xx driver .
* Copyright ( C ) 1998 - 2000 Gerard Roudier
*
* The sym53c8xx driver is derived from the ncr53c8xx driver that had been
* a port of the FreeBSD ncr driver to Linux - 1 . 2 . 13 .
*
* The original ncr driver has been written for 386 bsd and FreeBSD by
* Wolfgang Stanglmeier < wolf @ cologne . de >
* Stefan Esser < se @ mi . Uni - Koeln . de >
* Copyright ( C ) 1994 Wolfgang Stanglmeier
*
* Other major contributions :
*
* NVRAM detection and reading .
* Copyright ( C ) 1997 Richard Waltham < dormouse @ farsrobt . demon . co . uk >
*
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
*/
/*
* Scripts for SYMBIOS - Processor
*
* We have to know the offsets of all labels before we reach
* them ( for forward jumps ) . Therefore we declare a struct
* here . If you make changes inside the script ,
*
* DONT FORGET TO CHANGE THE LENGTHS HERE !
*/
/*
* Script fragments which are loaded into the on - chip RAM
* of 825 A , 875 , 876 , 895 , 895 A , 896 and 1010 chips .
* Must not exceed 4 K bytes .
*/
struct SYM_FWA_SCR {
u32 start [ 14 ];
u32 getjob_begin [ 4 ];
u32 getjob_end [ 4 ];
#ifdef SYM_CONF_TARGET_ROLE_SUPPORT
u32 select [ 6 ];
#else
u32 select [ 4 ];
#endif
#if SYM_CONF_DMA_ADDRESSING_MODE == 2
u32 is_dmap_dirty [ 4 ];
#endif
u32 wf_sel_done [ 2 ];
u32 sel_done [ 2 ];
u32 send_ident [ 2 ];
#ifdef SYM_CONF_IARB_SUPPORT
u32 select2 [ 8 ];
#else
u32 select2 [ 2 ];
#endif
u32 command [ 2 ];
u32 dispatch [ 28 ];
u32 sel_no_cmd [ 10 ];
u32 init [ 6 ];
u32 clrack [ 4 ];
u32 datai_done [ 10 ];
u32 datai_done_wsr [ 20 ];
u32 datao_done [ 10 ];
u32 datao_done_wss [ 6 ];
u32 datai_phase [ 4 ];
u32 datao_phase [ 6 ];
u32 msg_in [ 2 ];
u32 msg_in2 [ 10 ];
#ifdef SYM_CONF_IARB_SUPPORT
u32 status [ 14 ];
#else
u32 status [ 10 ];
#endif
u32 complete [ 6 ];
u32 complete2 [ 12 ];
u32 done [ 14 ];
u32 done_end [ 2 ];
u32 complete_error [ 4 ];
u32 save_dp [ 12 ];
u32 restore_dp [ 8 ];
u32 disconnect [ 12 ];
#ifdef SYM_CONF_IARB_SUPPORT
u32 idle [ 4 ];
#else
u32 idle [ 2 ];
#endif
#ifdef SYM_CONF_IARB_SUPPORT
u32 ungetjob [ 6 ];
#else
u32 ungetjob [ 4 ];
#endif
#ifdef SYM_CONF_TARGET_ROLE_SUPPORT
u32 reselect [ 4 ];
#else
u32 reselect [ 2 ];
#endif
u32 reselected [ 22 ];
u32 resel_scntl4 [ 20 ];
u32 resel_lun0 [ 6 ];
#if SYM_CONF_MAX_TASK*4 > 512
u32 resel_tag [ 26 ];
#elif SYM_CONF_MAX_TASK*4 > 256
u32 resel_tag [ 20 ];
#else
u32 resel_tag [ 16 ];
#endif
u32 resel_dsa [ 2 ];
u32 resel_dsa1 [ 4 ];
u32 resel_no_tag [ 6 ];
u32 data_in [SYM_CONF_MAX_SG * 2 ];
u32 data_in2 [ 4 ];
u32 data_out [SYM_CONF_MAX_SG * 2 ];
u32 data_out2 [ 4 ];
u32 pm0_data [ 12 ];
u32 pm0_data_out [ 6 ];
u32 pm0_data_end [ 6 ];
u32 pm1_data [ 12 ];
u32 pm1_data_out [ 6 ];
u32 pm1_data_end [ 6 ];
};
/*
* Script fragments which stay in main memory for all chips
* except for chips that support 8 K on - chip RAM .
*/
struct SYM_FWB_SCR {
u32 start64 [ 2 ];
u32 no_data [ 2 ];
#ifdef SYM_CONF_TARGET_ROLE_SUPPORT
u32 sel_for_abort [ 18 ];
#else
u32 sel_for_abort [ 16 ];
#endif
u32 sel_for_abort_1 [ 2 ];
u32 msg_in_etc [ 12 ];
u32 msg_received [ 4 ];
u32 msg_weird_seen [ 4 ];
u32 msg_extended [ 20 ];
u32 msg_bad [ 6 ];
u32 msg_weird [ 4 ];
u32 msg_weird1 [ 8 ];
u32 wdtr_resp [ 6 ];
u32 send_wdtr [ 4 ];
u32 sdtr_resp [ 6 ];
u32 send_sdtr [ 4 ];
u32 ppr_resp [ 6 ];
u32 send_ppr [ 4 ];
u32 nego_bad_phase [ 4 ];
u32 msg_out [ 4 ];
u32 msg_out_done [ 4 ];
u32 data_ovrun [ 2 ];
u32 data_ovrun1 [ 22 ];
u32 data_ovrun2 [ 8 ];
u32 abort_resel [ 16 ];
u32 resend_ident [ 4 ];
u32 ident_break [ 4 ];
u32 ident_break_atn [ 4 ];
u32 sdata_in [ 6 ];
u32 resel_bad_lun [ 4 ];
u32 bad_i_t_l [ 4 ];
u32 bad_i_t_l_q [ 4 ];
u32 bad_status [ 6 ];
u32 pm_handle [ 20 ];
u32 pm_handle1 [ 4 ];
u32 pm_save [ 4 ];
u32 pm0_save [ 12 ];
u32 pm_save_end [ 4 ];
u32 pm1_save [ 14 ];
/* WSR handling */
u32 pm_wsr_handle [ 38 ];
u32 wsr_ma_helper [ 4 ];
/* Data area */
u32 zero [ 1 ];
u32 scratch [ 1 ];
u32 pm0_data_addr [ 1 ];
u32 pm1_data_addr [ 1 ];
u32 done_pos [ 1 ];
u32 startpos [ 1 ];
u32 targtbl [ 1 ];
};
/*
* Script fragments used at initialisations .
* Only runs out of main memory .
*/
struct SYM_FWZ_SCR {
u32 snooptest [ 6 ];
u32 snoopend [ 2 ];
};
static struct SYM_FWA_SCR SYM_FWA_SCR = {
/*--------------------------< START >----------------------------*/ {
/*
* Switch the LED on .
* Will be patched with a NO_OP if LED
* not needed or not desired .
*/
SCR_REG_REG (gpreg, SCR_AND, 0 xfe),
0 ,
/*
* Clear SIGP .
*/
SCR_FROM_REG (ctest2),
0 ,
/*
* Stop here if the C code wants to perform
* some error recovery procedure manually .
* ( Indicate this by setting SEM in ISTAT )
*/
SCR_FROM_REG (istat),
0 ,
/*
* Report to the C code the next position in
* the start queue the SCRIPTS will schedule .
* The C code must not change SCRATCHA .
*/
SCR_LOAD_ABS (scratcha, 4 ),
PADDR_B (startpos),
SCR_INT ^ IFTRUE (MASK (SEM, SEM)),
SIR_SCRIPT_STOPPED,
/*
* Start the next job .
*
* @ DSA = start point for this job .
* SCRATCHA = address of this job in the start queue .
*
* We will restore startpos with SCRATCHA if we fails the
* arbitration or if it is the idle job .
*
* The below GETJOB_BEGIN to GETJOB_END section of SCRIPTS
* is a critical path . If it is partially executed , it then
* may happen that the job address is not yet in the DSA
* and the next queue position points to the next JOB .
*/
SCR_LOAD_ABS (dsa, 4 ),
PADDR_B (startpos),
SCR_LOAD_REL (temp, 4 ),
4 ,
}/*-------------------------< GETJOB_BEGIN >---------------------*/,{
SCR_STORE_ABS (temp, 4 ),
PADDR_B (startpos),
SCR_LOAD_REL (dsa, 4 ),
0 ,
}/*-------------------------< GETJOB_END >-----------------------*/,{
SCR_LOAD_REL (temp, 4 ),
0 ,
SCR_RETURN,
0 ,
}/*-------------------------< SELECT >---------------------------*/,{
/*
* DSA contains the address of a scheduled
* data structure .
*
* SCRATCHA contains the address of the start queue
* entry which points to the next job .
*
* Set Initiator mode .
*
* ( Target mode is left as an exercise for the reader )
*/
#ifdef SYM_CONF_TARGET_ROLE_SUPPORT
SCR_CLR (SCR_TRG),
0 ,
#endif
/*
* And try to select this target .
*/
SCR_SEL_TBL_ATN ^ offsetof (struct sym_dsb, select),
PADDR_A (ungetjob),
/*
* Now there are 4 possibilities :
*
* ( 1 ) The chip loses arbitration .
* This is ok , because it will try again ,
* when the bus becomes idle .
* ( But beware of the timeout function ! )
*
* ( 2 ) The chip is reselected .
* Then the script processor takes the jump
* to the RESELECT label .
*
* ( 3 ) The chip wins arbitration .
* Then it will execute SCRIPTS instruction until
* the next instruction that checks SCSI phase .
* Then will stop and wait for selection to be
* complete or selection time - out to occur .
*
* After having won arbitration , the SCRIPTS
* processor is able to execute instructions while
* the SCSI core is performing SCSI selection .
*/
/*
* Initialize the status registers
*/
SCR_LOAD_REL (scr0, 4 ),
offsetof (struct sym_ccb, phys.head.status),
/*
* We may need help from CPU if the DMA segment
* registers aren ' t up - to - date for this IO .
* Patched with NOOP for chips that donnot
* support DAC addressing .
*/
#if SYM_CONF_DMA_ADDRESSING_MODE == 2
}/*-------------------------< IS_DMAP_DIRTY >--------------------*/,{
SCR_FROM_REG (HX_REG),
0 ,
SCR_INT ^ IFTRUE (MASK (HX_DMAP_DIRTY, HX_DMAP_DIRTY)),
SIR_DMAP_DIRTY,
#endif
}/*-------------------------< WF_SEL_DONE >----------------------*/,{
SCR_INT ^ IFFALSE (WHEN (SCR_MSG_OUT)),
SIR_SEL_ATN_NO_MSG_OUT,
}/*-------------------------< SEL_DONE >-------------------------*/,{
/*
* C1010 - 33 errata work - around .
* Due to a race , the SCSI core may not have
* loaded SCNTL3 on SEL_TBL instruction .
* We reload it once phase is stable .
* Patched with a NOOP for other chips .
*/
SCR_LOAD_REL (scntl3, 1 ),
offsetof(struct sym_dsb, select.sel_scntl3),
}/*-------------------------< SEND_IDENT >-----------------------*/,{
/*
* Selection complete .
* Send the IDENTIFY and possibly the TAG message
* and negotiation message if present .
*/
SCR_MOVE_TBL ^ SCR_MSG_OUT,
offsetof (struct sym_dsb, smsg),
}/*-------------------------< SELECT2 >--------------------------*/,{
#ifdef SYM_CONF_IARB_SUPPORT
/*
* Set IMMEDIATE ARBITRATION if we have been given
* a hint to do so . ( Some job to do after this one ) .
*/
SCR_FROM_REG (HF_REG),
0 ,
SCR_JUMPR ^ IFFALSE (MASK (HF_HINT_IARB, HF_HINT_IARB)),
8 ,
SCR_REG_REG (scntl1, SCR_OR, IARB),
0 ,
#endif
/*
* Anticipate the COMMAND phase .
* This is the PHASE we expect at this point .
*/
SCR_JUMP ^ IFFALSE (WHEN (SCR_COMMAND)),
PADDR_A (sel_no_cmd),
}/*-------------------------< COMMAND >--------------------------*/,{
/*
* . . . and send the command
*/
SCR_MOVE_TBL ^ SCR_COMMAND,
offsetof (struct sym_dsb, cmd),
}/*-------------------------< DISPATCH >-------------------------*/,{
/*
* MSG_IN is the only phase that shall be
* entered at least once for each ( re ) selection .
* So we test it first .
*/
SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_IN)),
PADDR_A (msg_in),
SCR_JUMP ^ IFTRUE (IF (SCR_DATA_OUT)),
PADDR_A (datao_phase),
SCR_JUMP ^ IFTRUE (IF (SCR_DATA_IN)),
PADDR_A (datai_phase),
SCR_JUMP ^ IFTRUE (IF (SCR_STATUS)),
PADDR_A (status),
SCR_JUMP ^ IFTRUE (IF (SCR_COMMAND)),
PADDR_A (command),
SCR_JUMP ^ IFTRUE (IF (SCR_MSG_OUT)),
PADDR_B (msg_out),
/*
* Discard as many illegal phases as
* required and tell the C code about .
*/
SCR_JUMPR ^ IFFALSE (WHEN (SCR_ILG_OUT)),
16 ,
SCR_MOVE_ABS (1 ) ^ SCR_ILG_OUT,
HADDR_1 (scratch),
SCR_JUMPR ^ IFTRUE (WHEN (SCR_ILG_OUT)),
-16 ,
SCR_JUMPR ^ IFFALSE (WHEN (SCR_ILG_IN)),
16 ,
SCR_MOVE_ABS (1 ) ^ SCR_ILG_IN,
HADDR_1 (scratch),
SCR_JUMPR ^ IFTRUE (WHEN (SCR_ILG_IN)),
-16 ,
SCR_INT,
SIR_BAD_PHASE,
SCR_JUMP,
PADDR_A (dispatch),
}/*-------------------------< SEL_NO_CMD >-----------------------*/,{
/*
* The target does not switch to command
* phase after IDENTIFY has been sent .
*
* If it stays in MSG OUT phase send it
* the IDENTIFY again .
*/
SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_OUT)),
PADDR_B (resend_ident),
/*
* If target does not switch to MSG IN phase
* and we sent a negotiation , assert the
* failure immediately .
*/
SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_IN)),
PADDR_A (dispatch),
SCR_FROM_REG (HS_REG),
0 ,
SCR_INT ^ IFTRUE (DATA (HS_NEGOTIATE)),
SIR_NEGO_FAILED,
/*
* Jump to dispatcher .
*/
SCR_JUMP,
PADDR_A (dispatch),
}/*-------------------------< INIT >-----------------------------*/,{
/*
* Wait for the SCSI RESET signal to be
* inactive before restarting operations ,
* since the chip may hang on SEL_ATN
* if SCSI RESET is active .
*/
SCR_FROM_REG (sstat0),
0 ,
SCR_JUMPR ^ IFTRUE (MASK (IRST, IRST)),
-16 ,
SCR_JUMP,
PADDR_A (start),
}/*-------------------------< CLRACK >---------------------------*/,{
/*
* Terminate possible pending message phase .
*/
SCR_CLR (SCR_ACK),
0 ,
SCR_JUMP,
PADDR_A (dispatch),
}/*-------------------------< DATAI_DONE >-----------------------*/,{
/*
* Save current pointer to LASTP .
*/
SCR_STORE_REL (temp, 4 ),
offsetof (struct sym_ccb, phys.head.lastp),
/*
* If the SWIDE is not full , jump to dispatcher .
* We anticipate a STATUS phase .
*/
SCR_FROM_REG (scntl2),
0 ,
SCR_JUMP ^ IFTRUE (MASK (WSR, WSR)),
PADDR_A (datai_done_wsr),
SCR_JUMP ^ IFTRUE (WHEN (SCR_STATUS)),
PADDR_A (status),
SCR_JUMP,
PADDR_A (dispatch),
}/*-------------------------< DATAI_DONE_WSR >-------------------*/,{
/*
* The SWIDE is full .
* Clear this condition .
*/
SCR_REG_REG (scntl2, SCR_OR, WSR),
0 ,
/*
* We are expecting an IGNORE RESIDUE message
* from the device , otherwise we are in data
* overrun condition . Check against MSG_IN phase .
*/
SCR_INT ^ IFFALSE (WHEN (SCR_MSG_IN)),
SIR_SWIDE_OVERRUN,
SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
PADDR_A (dispatch),
/*
* We are in MSG_IN phase ,
* Read the first byte of the message .
* If it is not an IGNORE RESIDUE message ,
* signal overrun and jump to message
* processing .
*/
SCR_MOVE_ABS (1 ) ^ SCR_MSG_IN,
HADDR_1 (msgin[0 ]),
SCR_INT ^ IFFALSE (DATA (M_IGN_RESIDUE)),
SIR_SWIDE_OVERRUN,
SCR_JUMP ^ IFFALSE (DATA (M_IGN_RESIDUE)),
PADDR_A (msg_in2),
/*
* We got the message we expected .
* Read the 2 nd byte , and jump to dispatcher .
*/
SCR_CLR (SCR_ACK),
0 ,
SCR_MOVE_ABS (1 ) ^ SCR_MSG_IN,
HADDR_1 (msgin[1 ]),
SCR_CLR (SCR_ACK),
0 ,
SCR_JUMP,
PADDR_A (dispatch),
}/*-------------------------< DATAO_DONE >-----------------------*/,{
/*
* Save current pointer to LASTP .
*/
SCR_STORE_REL (temp, 4 ),
offsetof (struct sym_ccb, phys.head.lastp),
/*
* If the SODL is not full jump to dispatcher .
* We anticipate a STATUS phase .
*/
SCR_FROM_REG (scntl2),
0 ,
SCR_JUMP ^ IFTRUE (MASK (WSS, WSS)),
PADDR_A (datao_done_wss),
SCR_JUMP ^ IFTRUE (WHEN (SCR_STATUS)),
PADDR_A (status),
SCR_JUMP,
PADDR_A (dispatch),
}/*-------------------------< DATAO_DONE_WSS >-------------------*/,{
/*
* The SODL is full , clear this condition .
*/
SCR_REG_REG (scntl2, SCR_OR, WSS),
0 ,
/*
* And signal a DATA UNDERRUN condition
* to the C code .
*/
SCR_INT,
SIR_SODL_UNDERRUN,
SCR_JUMP,
PADDR_A (dispatch),
}/*-------------------------< DATAI_PHASE >----------------------*/,{
/*
* Jump to current pointer .
*/
SCR_LOAD_REL (temp, 4 ),
offsetof (struct sym_ccb, phys.head.lastp),
SCR_RETURN,
0 ,
}/*-------------------------< DATAO_PHASE >----------------------*/,{
/*
* C1010 - 66 errata work - around .
* Extra clocks of data hold must be inserted
* in DATA OUT phase on 33 MHz PCI BUS .
* Patched with a NOOP for other chips .
*/
SCR_REG_REG (scntl4, SCR_OR, (XCLKH_DT|XCLKH_ST)),
0 ,
/*
* Jump to current pointer .
*/
SCR_LOAD_REL (temp, 4 ),
offsetof (struct sym_ccb, phys.head.lastp),
SCR_RETURN,
0 ,
}/*-------------------------< MSG_IN >---------------------------*/,{
/*
* Get the first byte of the message .
*
* The script processor doesn ' t negate the
* ACK signal after this transfer .
*/
SCR_MOVE_ABS (1 ) ^ SCR_MSG_IN,
HADDR_1 (msgin[0 ]),
}/*-------------------------< MSG_IN2 >--------------------------*/,{
/*
* Check first against 1 byte messages
* that we handle from SCRIPTS .
*/
SCR_JUMP ^ IFTRUE (DATA (M_COMPLETE)),
PADDR_A (complete),
SCR_JUMP ^ IFTRUE (DATA (M_DISCONNECT)),
PADDR_A (disconnect),
SCR_JUMP ^ IFTRUE (DATA (M_SAVE_DP)),
PADDR_A (save_dp),
SCR_JUMP ^ IFTRUE (DATA (M_RESTORE_DP)),
PADDR_A (restore_dp),
/*
* We handle all other messages from the
* C code , so no need to waste on - chip RAM
* for those ones .
*/
SCR_JUMP,
PADDR_B (msg_in_etc),
}/*-------------------------< STATUS >---------------------------*/,{
/*
* get the status
*/
SCR_MOVE_ABS (1 ) ^ SCR_STATUS,
HADDR_1 (scratch),
#ifdef SYM_CONF_IARB_SUPPORT
/*
* If STATUS is not GOOD , clear IMMEDIATE ARBITRATION ,
* since we may have to tamper the start queue from
* the C code .
*/
SCR_JUMPR ^ IFTRUE (DATA (S_GOOD)),
8 ,
SCR_REG_REG (scntl1, SCR_AND, ~IARB),
0 ,
#endif
/*
* save status to scsi_status .
* mark as complete .
*/
SCR_TO_REG (SS_REG),
0 ,
SCR_LOAD_REG (HS_REG, HS_COMPLETE),
0 ,
/*
* Anticipate the MESSAGE PHASE for
* the TASK COMPLETE message .
*/
SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_IN)),
PADDR_A (msg_in),
SCR_JUMP,
PADDR_A (dispatch),
}/*-------------------------< COMPLETE >-------------------------*/,{
/*
* Complete message .
*
* When we terminate the cycle by clearing ACK ,
* the target may disconnect immediately .
*
* We don ' t want to be told of an " unexpected disconnect " ,
* so we disable this feature .
*/
SCR_REG_REG (scntl2, SCR_AND, 0 x7f),
0 ,
/*
* Terminate cycle . . .
*/
SCR_CLR (SCR_ACK|SCR_ATN),
0 ,
/*
* . . . and wait for the disconnect .
*/
SCR_WAIT_DISC,
0 ,
}/*-------------------------< COMPLETE2 >------------------------*/,{
/*
* Save host status .
*/
SCR_STORE_REL (scr0, 4 ),
offsetof (struct sym_ccb, phys.head.status),
/*
* Some bridges may reorder DMA writes to memory .
* We donnot want the CPU to deal with completions
* without all the posted write having been flushed
* to memory . This DUMMY READ should flush posted
* buffers prior to the CPU having to deal with
* completions .
*/
SCR_LOAD_REL (scr0, 4 ), /* DUMMY READ */
offsetof (struct sym_ccb, phys.head.status),
/*
* If command resulted in not GOOD status ,
* call the C code if needed .
*/
SCR_FROM_REG (SS_REG),
0 ,
SCR_CALL ^ IFFALSE (DATA (S_GOOD)),
PADDR_B (bad_status),
/*
* If we performed an auto - sense , call
* the C code to synchronyze task aborts
* with UNIT ATTENTION conditions .
*/
SCR_FROM_REG (HF_REG),
0 ,
SCR_JUMP ^ IFFALSE (MASK (0 ,(HF_SENSE|HF_EXT_ERR))),
PADDR_A (complete_error),
}/*-------------------------< DONE >-----------------------------*/,{
/*
* Copy the DSA to the DONE QUEUE and
* signal completion to the host .
* If we are interrupted between DONE
* and DONE_END , we must reset , otherwise
* the completed CCB may be lost .
*/
SCR_STORE_ABS (dsa, 4 ),
PADDR_B (scratch),
SCR_LOAD_ABS (dsa, 4 ),
PADDR_B (done_pos),
SCR_LOAD_ABS (scratcha, 4 ),
PADDR_B (scratch),
SCR_STORE_REL (scratcha, 4 ),
0 ,
/*
* The instruction below reads the DONE QUEUE next
* free position from memory .
* In addition it ensures that all PCI posted writes
* are flushed and so the DSA value of the done
* CCB is visible by the CPU before INTFLY is raised .
*/
SCR_LOAD_REL (scratcha, 4 ),
4 ,
SCR_INT_FLY,
0 ,
SCR_STORE_ABS (scratcha, 4 ),
PADDR_B (done_pos),
}/*-------------------------< DONE_END >-------------------------*/,{
SCR_JUMP,
PADDR_A (start),
}/*-------------------------< COMPLETE_ERROR >-------------------*/,{
SCR_LOAD_ABS (scratcha, 4 ),
PADDR_B (startpos),
SCR_INT,
SIR_COMPLETE_ERROR,
}/*-------------------------< SAVE_DP >--------------------------*/,{
/*
* Clear ACK immediately .
* No need to delay it .
*/
SCR_CLR (SCR_ACK),
0 ,
/*
* Keep track we received a SAVE DP , so
* we will switch to the other PM context
* on the next PM since the DP may point
* to the current PM context .
*/
SCR_REG_REG (HF_REG, SCR_OR, HF_DP_SAVED),
0 ,
/*
* SAVE_DP message :
* Copy LASTP to SAVEP .
*/
SCR_LOAD_REL (scratcha, 4 ),
offsetof (struct sym_ccb, phys.head.lastp),
SCR_STORE_REL (scratcha, 4 ),
offsetof (struct sym_ccb, phys.head.savep),
/*
* Anticipate the MESSAGE PHASE for
* the DISCONNECT message .
*/
SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_IN)),
PADDR_A (msg_in),
SCR_JUMP,
PADDR_A (dispatch),
}/*-------------------------< RESTORE_DP >-----------------------*/,{
/*
* Clear ACK immediately .
* No need to delay it .
*/
SCR_CLR (SCR_ACK),
0 ,
/*
* Copy SAVEP to LASTP .
*/
SCR_LOAD_REL (scratcha, 4 ),
offsetof (struct sym_ccb, phys.head.savep),
SCR_STORE_REL (scratcha, 4 ),
offsetof (struct sym_ccb, phys.head.lastp),
SCR_JUMP,
PADDR_A (dispatch),
}/*-------------------------< DISCONNECT >-----------------------*/,{
/*
* DISCONNECTing . . .
*
* disable the " unexpected disconnect " feature ,
* and remove the ACK signal .
*/
SCR_REG_REG (scntl2, SCR_AND, 0 x7f),
0 ,
SCR_CLR (SCR_ACK|SCR_ATN),
0 ,
/*
* Wait for the disconnect .
*/
SCR_WAIT_DISC,
0 ,
/*
* Status is : DISCONNECTED .
*/
SCR_LOAD_REG (HS_REG, HS_DISCONNECT),
0 ,
/*
* Save host status .
*/
SCR_STORE_REL (scr0, 4 ),
offsetof (struct sym_ccb, phys.head.status),
SCR_JUMP,
PADDR_A (start),
}/*-------------------------< IDLE >-----------------------------*/,{
/*
* Nothing to do ?
* Switch the LED off and wait for reselect .
* Will be patched with a NO_OP if LED
* not needed or not desired .
*/
SCR_REG_REG (gpreg, SCR_OR, 0 x01),
0 ,
#ifdef SYM_CONF_IARB_SUPPORT
SCR_JUMPR,
8 ,
#endif
}/*-------------------------< UNGETJOB >-------------------------*/,{
#ifdef SYM_CONF_IARB_SUPPORT
/*
* Set IMMEDIATE ARBITRATION , for the next time .
* This will give us better chance to win arbitration
* for the job we just wanted to do .
*/
SCR_REG_REG (scntl1, SCR_OR, IARB),
0 ,
#endif
/*
* We are not able to restart the SCRIPTS if we are
* interrupted and these instruction haven ' t been
* all executed . BTW , this is very unlikely to
* happen , but we check that from the C code .
*/
SCR_LOAD_REG (dsa, 0 xff),
0 ,
SCR_STORE_ABS (scratcha, 4 ),
PADDR_B (startpos),
}/*-------------------------< RESELECT >-------------------------*/,{
#ifdef SYM_CONF_TARGET_ROLE_SUPPORT
/*
* Make sure we are in initiator mode .
*/
SCR_CLR (SCR_TRG),
0 ,
#endif
/*
* Sleep waiting for a reselection .
*/
SCR_WAIT_RESEL,
PADDR_A(start),
}/*-------------------------< RESELECTED >-----------------------*/,{
/*
* Switch the LED on .
* Will be patched with a NO_OP if LED
* not needed or not desired .
*/
SCR_REG_REG (gpreg, SCR_AND, 0 xfe),
0 ,
/*
* load the target id into the sdid
*/
SCR_REG_SFBR (ssid, SCR_AND, 0 x8F),
0 ,
SCR_TO_REG (sdid),
0 ,
/*
* Load the target control block address
*/
SCR_LOAD_ABS (dsa, 4 ),
PADDR_B (targtbl),
SCR_SFBR_REG (dsa, SCR_SHL, 0 ),
0 ,
SCR_REG_REG (dsa, SCR_SHL, 0 ),
0 ,
SCR_REG_REG (dsa, SCR_AND, 0 x3c),
0 ,
SCR_LOAD_REL (dsa, 4 ),
0 ,
/*
* We expect MESSAGE IN phase .
* If not , get help from the C code .
*/
SCR_INT ^ IFFALSE (WHEN (SCR_MSG_IN)),
SIR_RESEL_NO_MSG_IN,
/*
* Load the legacy synchronous transfer registers .
*/
SCR_LOAD_REL (scntl3, 1 ),
offsetof(struct sym_tcb, head.wval),
SCR_LOAD_REL (sxfer, 1 ),
offsetof(struct sym_tcb, head.sval),
}/*-------------------------< RESEL_SCNTL4 >---------------------*/,{
/*
* The C1010 uses a new synchronous timing scheme .
* Will be patched with a NO_OP if not a C1010 .
*/
SCR_LOAD_REL (scntl4, 1 ),
offsetof(struct sym_tcb, head.uval),
/*
* Get the IDENTIFY message .
*/
SCR_MOVE_ABS (1 ) ^ SCR_MSG_IN,
HADDR_1 (msgin),
/*
* If IDENTIFY LUN # 0 , use a faster path
* to find the LCB structure .
*/
SCR_JUMP ^ IFTRUE (MASK (0 x80, 0 xbf)),
PADDR_A (resel_lun0),
/*
* If message isn ' t an IDENTIFY ,
* tell the C code about .
*/
SCR_INT ^ IFFALSE (MASK (0 x80, 0 x80)),
SIR_RESEL_NO_IDENTIFY,
/*
* It is an IDENTIFY message ,
* Load the LUN control block address .
*/
SCR_LOAD_REL (dsa, 4 ),
offsetof(struct sym_tcb, head.luntbl_sa),
SCR_SFBR_REG (dsa, SCR_SHL, 0 ),
0 ,
SCR_REG_REG (dsa, SCR_SHL, 0 ),
0 ,
SCR_REG_REG (dsa, SCR_AND, 0 xfc),
0 ,
SCR_LOAD_REL (dsa, 4 ),
0 ,
SCR_JUMPR,
8 ,
}/*-------------------------< RESEL_LUN0 >-----------------------*/,{
/*
* LUN 0 special case ( but usual one : ) )
*/
SCR_LOAD_REL (dsa, 4 ),
offsetof(struct sym_tcb, head.lun0_sa),
/*
* Jump indirectly to the reselect action for this LUN .
*/
SCR_LOAD_REL (temp, 4 ),
offsetof(struct sym_lcb, head.resel_sa),
SCR_RETURN,
0 ,
/* In normal situations, we jump to RESEL_TAG or RESEL_NO_TAG */
}/*-------------------------< RESEL_TAG >------------------------*/,{
/*
* ACK the IDENTIFY previously received .
*/
SCR_CLR (SCR_ACK),
0 ,
/*
* It shall be a tagged command .
* Read SIMPLE + TAG .
* The C code will deal with errors .
* Aggressive optimization , isn ' t it ? : )
*/
SCR_MOVE_ABS (2 ) ^ SCR_MSG_IN,
HADDR_1 (msgin),
/*
* Load the pointer to the tagged task
* table for this LUN .
*/
SCR_LOAD_REL (dsa, 4 ),
offsetof(struct sym_lcb, head.itlq_tbl_sa),
/*
* The SIDL still contains the TAG value .
* Aggressive optimization , isn ' t it ? : ) : )
*/
SCR_REG_SFBR (sidl, SCR_SHL, 0 ),
0 ,
#if SYM_CONF_MAX_TASK*4 > 512
SCR_JUMPR ^ IFFALSE (CARRYSET),
8 ,
SCR_REG_REG (dsa1, SCR_OR, 2 ),
0 ,
SCR_REG_REG (sfbr, SCR_SHL, 0 ),
0 ,
SCR_JUMPR ^ IFFALSE (CARRYSET),
8 ,
SCR_REG_REG (dsa1, SCR_OR, 1 ),
0 ,
#elif SYM_CONF_MAX_TASK*4 > 256
SCR_JUMPR ^ IFFALSE (CARRYSET),
8 ,
SCR_REG_REG (dsa1, SCR_OR, 1 ),
0 ,
#endif
/*
* Retrieve the DSA of this task .
* JUMP indirectly to the restart point of the CCB .
*/
SCR_SFBR_REG (dsa, SCR_AND, 0 xfc),
0 ,
SCR_LOAD_REL (dsa, 4 ),
0 ,
SCR_LOAD_REL (temp, 4 ),
offsetof(struct sym_ccb, phys.head.go.restart),
SCR_RETURN,
0 ,
/* In normal situations we branch to RESEL_DSA */
}/*-------------------------< RESEL_DSA >------------------------*/,{
/*
* ACK the IDENTIFY or TAG previously received .
*/
SCR_CLR (SCR_ACK),
0 ,
}/*-------------------------< RESEL_DSA1 >-----------------------*/,{
/*
* Initialize the status registers
*/
SCR_LOAD_REL (scr0, 4 ),
offsetof (struct sym_ccb, phys.head.status),
/*
* Jump to dispatcher .
*/
SCR_JUMP,
PADDR_A (dispatch),
}/*-------------------------< RESEL_NO_TAG >---------------------*/,{
/*
* Load the DSA with the unique ITL task .
*/
SCR_LOAD_REL (dsa, 4 ),
offsetof(struct sym_lcb, head.itl_task_sa),
/*
* JUMP indirectly to the restart point of the CCB .
*/
SCR_LOAD_REL (temp, 4 ),
offsetof(struct sym_ccb, phys.head.go.restart),
SCR_RETURN,
0 ,
/* In normal situations we branch to RESEL_DSA */
}/*-------------------------< DATA_IN >--------------------------*/,{
/*
* Because the size depends on the
* # define SYM_CONF_MAX_SG parameter ,
* it is filled in at runtime .
*
* # # = = = = = = = = = = = < i = 0 ; i < SYM_CONF_MAX_SG > = = = = = = = = =
* | | SCR_CHMOV_TBL ^ SCR_DATA_IN ,
* | | offsetof ( struct sym_dsb , data [ i ] ) ,
* # # = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
*/
0
}/*-------------------------< DATA_IN2 >-------------------------*/,{
SCR_CALL,
PADDR_A (datai_done),
SCR_JUMP,
PADDR_B (data_ovrun),
}/*-------------------------< DATA_OUT >-------------------------*/,{
/*
* Because the size depends on the
* # define SYM_CONF_MAX_SG parameter ,
* it is filled in at runtime .
*
* # # = = = = = = = = = = = < i = 0 ; i < SYM_CONF_MAX_SG > = = = = = = = = =
* | | SCR_CHMOV_TBL ^ SCR_DATA_OUT ,
* | | offsetof ( struct sym_dsb , data [ i ] ) ,
* # # = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
*/
0
}/*-------------------------< DATA_OUT2 >------------------------*/,{
SCR_CALL,
PADDR_A (datao_done),
SCR_JUMP,
PADDR_B (data_ovrun),
}/*-------------------------< PM0_DATA >-------------------------*/,{
/*
* Read our host flags to SFBR , so we will be able
* to check against the data direction we expect .
*/
SCR_FROM_REG (HF_REG),
0 ,
/*
* Check against actual DATA PHASE .
*/
SCR_JUMP ^ IFFALSE (WHEN (SCR_DATA_IN)),
PADDR_A (pm0_data_out),
/*
* Actual phase is DATA IN .
* Check against expected direction .
*/
SCR_JUMP ^ IFFALSE (MASK (HF_DATA_IN, HF_DATA_IN)),
PADDR_B (data_ovrun),
/*
* Keep track we are moving data from the
* PM0 DATA mini - script .
*/
SCR_REG_REG (HF_REG, SCR_OR, HF_IN_PM0),
0 ,
/*
* Move the data to memory .
*/
SCR_CHMOV_TBL ^ SCR_DATA_IN,
offsetof (struct sym_ccb, phys.pm0.sg),
SCR_JUMP,
PADDR_A (pm0_data_end),
}/*-------------------------< PM0_DATA_OUT >---------------------*/,{
/*
* Actual phase is DATA OUT .
* Check against expected direction .
*/
SCR_JUMP ^ IFTRUE (MASK (HF_DATA_IN, HF_DATA_IN)),
PADDR_B (data_ovrun),
/*
* Keep track we are moving data from the
* PM0 DATA mini - script .
*/
SCR_REG_REG (HF_REG, SCR_OR, HF_IN_PM0),
0 ,
/*
* Move the data from memory .
*/
SCR_CHMOV_TBL ^ SCR_DATA_OUT,
offsetof (struct sym_ccb, phys.pm0.sg),
}/*-------------------------< PM0_DATA_END >---------------------*/,{
/*
* Clear the flag that told we were moving
* data from the PM0 DATA mini - script .
*/
SCR_REG_REG (HF_REG, SCR_AND, (~HF_IN_PM0)),
0 ,
/*
* Return to the previous DATA script which
* is guaranteed by design ( if no bug ) to be
* the main DATA script for this transfer .
*/
SCR_LOAD_REL (temp, 4 ),
offsetof (struct sym_ccb, phys.pm0.ret),
SCR_RETURN,
0 ,
}/*-------------------------< PM1_DATA >-------------------------*/,{
/*
* Read our host flags to SFBR , so we will be able
* to check against the data direction we expect .
*/
SCR_FROM_REG (HF_REG),
0 ,
/*
* Check against actual DATA PHASE .
*/
SCR_JUMP ^ IFFALSE (WHEN (SCR_DATA_IN)),
PADDR_A (pm1_data_out),
/*
* Actual phase is DATA IN .
* Check against expected direction .
*/
SCR_JUMP ^ IFFALSE (MASK (HF_DATA_IN, HF_DATA_IN)),
PADDR_B (data_ovrun),
/*
* Keep track we are moving data from the
* PM1 DATA mini - script .
*/
SCR_REG_REG (HF_REG, SCR_OR, HF_IN_PM1),
0 ,
/*
* Move the data to memory .
*/
SCR_CHMOV_TBL ^ SCR_DATA_IN,
offsetof (struct sym_ccb, phys.pm1.sg),
SCR_JUMP,
PADDR_A (pm1_data_end),
}/*-------------------------< PM1_DATA_OUT >---------------------*/,{
/*
* Actual phase is DATA OUT .
* Check against expected direction .
*/
SCR_JUMP ^ IFTRUE (MASK (HF_DATA_IN, HF_DATA_IN)),
PADDR_B (data_ovrun),
/*
* Keep track we are moving data from the
* PM1 DATA mini - script .
*/
SCR_REG_REG (HF_REG, SCR_OR, HF_IN_PM1),
0 ,
/*
* Move the data from memory .
*/
SCR_CHMOV_TBL ^ SCR_DATA_OUT,
offsetof (struct sym_ccb, phys.pm1.sg),
}/*-------------------------< PM1_DATA_END >---------------------*/,{
/*
* Clear the flag that told we were moving
* data from the PM1 DATA mini - script .
*/
SCR_REG_REG (HF_REG, SCR_AND, (~HF_IN_PM1)),
0 ,
/*
* Return to the previous DATA script which
* is guaranteed by design ( if no bug ) to be
* the main DATA script for this transfer .
*/
SCR_LOAD_REL (temp, 4 ),
offsetof (struct sym_ccb, phys.pm1.ret),
SCR_RETURN,
0 ,
}/*-------------------------<>-----------------------------------*/
};
static struct SYM_FWB_SCR SYM_FWB_SCR = {
/*--------------------------< START64 >--------------------------*/ {
/*
* SCRIPT entry point for the 895 A , 896 and 1010 .
* For now , there is no specific stuff for those
* chips at this point , but this may come .
*/
SCR_JUMP,
PADDR_A (init),
}/*-------------------------< NO_DATA >--------------------------*/,{
SCR_JUMP,
PADDR_B (data_ovrun),
}/*-------------------------< SEL_FOR_ABORT >--------------------*/,{
/*
* We are jumped here by the C code , if we have
* some target to reset or some disconnected
* job to abort . Since error recovery is a serious
* busyness , we will really reset the SCSI BUS , if
* case of a SCSI interrupt occurring in this path .
*/
#ifdef SYM_CONF_TARGET_ROLE_SUPPORT
/*
* Set initiator mode .
*/
SCR_CLR (SCR_TRG),
0 ,
#endif
/*
* And try to select this target .
*/
SCR_SEL_TBL_ATN ^ offsetof (struct sym_hcb, abrt_sel),
PADDR_A (reselect),
/*
* Wait for the selection to complete or
* the selection to time out .
*/
SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_OUT)),
-8 ,
/*
* Call the C code .
*/
SCR_INT,
SIR_TARGET_SELECTED,
/*
* The C code should let us continue here .
* Send the ' kiss of death ' message .
* We expect an immediate disconnect once
* the target has eaten the message .
*/
SCR_REG_REG (scntl2, SCR_AND, 0 x7f),
0 ,
SCR_MOVE_TBL ^ SCR_MSG_OUT,
offsetof (struct sym_hcb, abrt_tbl),
SCR_CLR (SCR_ACK|SCR_ATN),
0 ,
SCR_WAIT_DISC,
0 ,
/*
* Tell the C code that we are done .
*/
SCR_INT,
SIR_ABORT_SENT,
}/*-------------------------< SEL_FOR_ABORT_1 >------------------*/,{
/*
* Jump at scheduler .
*/
SCR_JUMP,
PADDR_A (start),
}/*-------------------------< MSG_IN_ETC >-----------------------*/,{
/*
* If it is an EXTENDED ( variable size message )
* Handle it .
*/
SCR_JUMP ^ IFTRUE (DATA (M_EXTENDED)),
PADDR_B (msg_extended),
/*
* Let the C code handle any other
* 1 byte message .
*/
SCR_JUMP ^ IFTRUE (MASK (0 x00, 0 xf0)),
PADDR_B (msg_received),
SCR_JUMP ^ IFTRUE (MASK (0 x10, 0 xf0)),
PADDR_B (msg_received),
/*
* We donnot handle 2 bytes messages from SCRIPTS .
* So , let the C code deal with these ones too .
*/
SCR_JUMP ^ IFFALSE (MASK (0 x20, 0 xf0)),
PADDR_B (msg_weird_seen),
SCR_CLR (SCR_ACK),
0 ,
SCR_MOVE_ABS (1 ) ^ SCR_MSG_IN,
HADDR_1 (msgin[1 ]),
}/*-------------------------< MSG_RECEIVED >---------------------*/,{
SCR_LOAD_REL (scratcha, 4 ), /* DUMMY READ */
0 ,
SCR_INT,
SIR_MSG_RECEIVED,
}/*-------------------------< MSG_WEIRD_SEEN >-------------------*/,{
SCR_LOAD_REL (scratcha, 4 ), /* DUMMY READ */
0 ,
SCR_INT,
SIR_MSG_WEIRD,
}/*-------------------------< MSG_EXTENDED >---------------------*/,{
/*
* Clear ACK and get the next byte
* assumed to be the message length .
*/
SCR_CLR (SCR_ACK),
0 ,
SCR_MOVE_ABS (1 ) ^ SCR_MSG_IN,
HADDR_1 (msgin[1 ]),
/*
* Try to catch some unlikely situations as 0 length
* or too large the length .
*/
SCR_JUMP ^ IFTRUE (DATA (0 )),
PADDR_B (msg_weird_seen),
SCR_TO_REG (scratcha),
0 ,
SCR_REG_REG (sfbr, SCR_ADD, (256 -8 )),
0 ,
SCR_JUMP ^ IFTRUE (CARRYSET),
PADDR_B (msg_weird_seen),
/*
* We donnot handle extended messages from SCRIPTS .
* Read the amount of data corresponding to the
* message length and call the C code .
*/
SCR_STORE_REL (scratcha, 1 ),
offsetof (struct sym_dsb, smsg_ext.size),
SCR_CLR (SCR_ACK),
0 ,
SCR_MOVE_TBL ^ SCR_MSG_IN,
offsetof (struct sym_dsb, smsg_ext),
SCR_JUMP,
PADDR_B (msg_received),
}/*-------------------------< MSG_BAD >--------------------------*/,{
/*
* unimplemented message - reject it .
*/
SCR_INT,
SIR_REJECT_TO_SEND,
SCR_SET (SCR_ATN),
0 ,
SCR_JUMP,
PADDR_A (clrack),
}/*-------------------------< MSG_WEIRD >------------------------*/,{
/*
* weird message received
* ignore all MSG IN phases and reject it .
*/
SCR_INT,
SIR_REJECT_TO_SEND,
SCR_SET (SCR_ATN),
0 ,
}/*-------------------------< MSG_WEIRD1 >-----------------------*/,{
SCR_CLR (SCR_ACK),
0 ,
SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
PADDR_A (dispatch),
SCR_MOVE_ABS (1 ) ^ SCR_MSG_IN,
HADDR_1 (scratch),
SCR_JUMP,
PADDR_B (msg_weird1),
}/*-------------------------< WDTR_RESP >------------------------*/,{
/*
* let the target fetch our answer .
*/
SCR_SET (SCR_ATN),
0 ,
SCR_CLR (SCR_ACK),
0 ,
SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_OUT)),
PADDR_B (nego_bad_phase),
}/*-------------------------< SEND_WDTR >------------------------*/,{
/*
* Send the M_X_WIDE_REQ
*/
SCR_MOVE_ABS (4 ) ^ SCR_MSG_OUT,
HADDR_1 (msgout),
SCR_JUMP,
PADDR_B (msg_out_done),
}/*-------------------------< SDTR_RESP >------------------------*/,{
/*
* let the target fetch our answer .
*/
SCR_SET (SCR_ATN),
0 ,
SCR_CLR (SCR_ACK),
0 ,
SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_OUT)),
PADDR_B (nego_bad_phase),
}/*-------------------------< SEND_SDTR >------------------------*/,{
/*
* Send the M_X_SYNC_REQ
*/
SCR_MOVE_ABS (5 ) ^ SCR_MSG_OUT,
HADDR_1 (msgout),
SCR_JUMP,
PADDR_B (msg_out_done),
}/*-------------------------< PPR_RESP >-------------------------*/,{
/*
* let the target fetch our answer .
*/
SCR_SET (SCR_ATN),
0 ,
SCR_CLR (SCR_ACK),
0 ,
SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_OUT)),
PADDR_B (nego_bad_phase),
}/*-------------------------< SEND_PPR >-------------------------*/,{
/*
* Send the M_X_PPR_REQ
*/
SCR_MOVE_ABS (8 ) ^ SCR_MSG_OUT,
HADDR_1 (msgout),
SCR_JUMP,
PADDR_B (msg_out_done),
}/*-------------------------< NEGO_BAD_PHASE >-------------------*/,{
SCR_INT,
SIR_NEGO_PROTO,
SCR_JUMP,
PADDR_A (dispatch),
}/*-------------------------< MSG_OUT >--------------------------*/,{
/*
* The target requests a message .
* We donnot send messages that may
* require the device to go to bus free .
*/
SCR_MOVE_ABS (1 ) ^ SCR_MSG_OUT,
HADDR_1 (msgout),
/*
* . . . wait for the next phase
* if it ' s a message out , send it again , . . .
*/
SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_OUT)),
PADDR_B (msg_out),
}/*-------------------------< MSG_OUT_DONE >---------------------*/,{
/*
* Let the C code be aware of the
* sent message and clear the message .
*/
SCR_INT,
SIR_MSG_OUT_DONE,
/*
* . . . and process the next phase
*/
SCR_JUMP,
PADDR_A (dispatch),
}/*-------------------------< DATA_OVRUN >-----------------------*/,{
/*
* Use scratcha to count the extra bytes .
*/
SCR_LOAD_ABS (scratcha, 4 ),
PADDR_B (zero),
}/*-------------------------< DATA_OVRUN1 >----------------------*/,{
/*
* The target may want to transfer too much data .
*
* If phase is DATA OUT write 1 byte and count it .
*/
SCR_JUMPR ^ IFFALSE (WHEN (SCR_DATA_OUT)),
16 ,
SCR_CHMOV_ABS (1 ) ^ SCR_DATA_OUT,
HADDR_1 (scratch),
SCR_JUMP,
PADDR_B (data_ovrun2),
/*
* If WSR is set , clear this condition , and
* count this byte .
*/
SCR_FROM_REG (scntl2),
0 ,
SCR_JUMPR ^ IFFALSE (MASK (WSR, WSR)),
16 ,
SCR_REG_REG (scntl2, SCR_OR, WSR),
0 ,
SCR_JUMP,
PADDR_B (data_ovrun2),
/*
* Finally check against DATA IN phase .
* Signal data overrun to the C code
* and jump to dispatcher if not so .
* Read 1 byte otherwise and count it .
*/
SCR_JUMPR ^ IFTRUE (WHEN (SCR_DATA_IN)),
16 ,
SCR_INT,
SIR_DATA_OVERRUN,
SCR_JUMP,
PADDR_A (dispatch),
SCR_CHMOV_ABS (1 ) ^ SCR_DATA_IN,
HADDR_1 (scratch),
}/*-------------------------< DATA_OVRUN2 >----------------------*/,{
/*
* Count this byte .
* This will allow to return a negative
* residual to user .
*/
SCR_REG_REG (scratcha, SCR_ADD, 0 x01),
0 ,
SCR_REG_REG (scratcha1, SCR_ADDC, 0 ),
0 ,
SCR_REG_REG (scratcha2, SCR_ADDC, 0 ),
0 ,
/*
* . . and repeat as required .
*/
SCR_JUMP,
PADDR_B (data_ovrun1),
}/*-------------------------< ABORT_RESEL >----------------------*/,{
SCR_SET (SCR_ATN),
0 ,
SCR_CLR (SCR_ACK),
0 ,
/*
* send the abort / abortag / reset message
* we expect an immediate disconnect
*/
SCR_REG_REG (scntl2, SCR_AND, 0 x7f),
0 ,
SCR_MOVE_ABS (1 ) ^ SCR_MSG_OUT,
HADDR_1 (msgout),
SCR_CLR (SCR_ACK|SCR_ATN),
0 ,
SCR_WAIT_DISC,
0 ,
SCR_INT,
SIR_RESEL_ABORTED,
SCR_JUMP,
PADDR_A (start),
}/*-------------------------< RESEND_IDENT >---------------------*/,{
/*
* The target stays in MSG OUT phase after having acked
* Identify [ + Tag [ + Extended message ] ] . Targets shall
* behave this way on parity error .
* We must send it again all the messages .
*/
SCR_SET (SCR_ATN), /* Shall be asserted 2 deskew delays before the */
0 , /* 1rst ACK = 90 ns. Hope the chip isn't too fast */
SCR_JUMP,
PADDR_A (send_ident),
}/*-------------------------< IDENT_BREAK >----------------------*/,{
SCR_CLR (SCR_ATN),
0 ,
SCR_JUMP,
PADDR_A (select2),
}/*-------------------------< IDENT_BREAK_ATN >------------------*/,{
SCR_SET (SCR_ATN),
0 ,
SCR_JUMP,
PADDR_A (select2),
}/*-------------------------< SDATA_IN >-------------------------*/,{
SCR_CHMOV_TBL ^ SCR_DATA_IN,
offsetof (struct sym_dsb, sense),
SCR_CALL,
PADDR_A (datai_done),
SCR_JUMP,
PADDR_B (data_ovrun),
}/*-------------------------< RESEL_BAD_LUN >--------------------*/,{
/*
* Message is an IDENTIFY , but lun is unknown .
* Signal problem to C code for logging the event .
* Send a M_ABORT to clear all pending tasks .
*/
SCR_INT,
SIR_RESEL_BAD_LUN,
SCR_JUMP,
PADDR_B (abort_resel),
}/*-------------------------< BAD_I_T_L >------------------------*/,{
/*
* We donnot have a task for that I_T_L .
* Signal problem to C code for logging the event .
* Send a M_ABORT message .
*/
SCR_INT,
SIR_RESEL_BAD_I_T_L,
SCR_JUMP,
PADDR_B (abort_resel),
}/*-------------------------< BAD_I_T_L_Q >----------------------*/,{
/*
* We donnot have a task that matches the tag .
* Signal problem to C code for logging the event .
* Send a M_ABORTTAG message .
*/
SCR_INT,
SIR_RESEL_BAD_I_T_L_Q,
SCR_JUMP,
PADDR_B (abort_resel),
}/*-------------------------< BAD_STATUS >-----------------------*/,{
/*
* Anything different from INTERMEDIATE
* CONDITION MET should be a bad SCSI status ,
* given that GOOD status has already been tested .
* Call the C code .
*/
SCR_LOAD_ABS (scratcha, 4 ),
PADDR_B (startpos),
SCR_INT ^ IFFALSE (DATA (S_COND_MET)),
SIR_BAD_SCSI_STATUS,
SCR_RETURN,
0 ,
}/*-------------------------< PM_HANDLE >------------------------*/,{
/*
* Phase mismatch handling .
*
* Since we have to deal with 2 SCSI data pointers
* ( current and saved ) , we need at least 2 contexts .
* Each context ( pm0 and pm1 ) has a saved area , a
* SAVE mini - script and a DATA phase mini - script .
*/
/*
* Get the PM handling flags .
*/
SCR_FROM_REG (HF_REG),
0 ,
/*
* If no flags ( 1 rst PM for example ) , avoid
* all the below heavy flags testing .
* This makes the normal case a bit faster .
*/
SCR_JUMP ^ IFTRUE (MASK (0 , (HF_IN_PM0 | HF_IN_PM1 | HF_DP_SAVED))),
PADDR_B (pm_handle1),
/*
* If we received a SAVE DP , switch to the
* other PM context since the savep may point
* to the current PM context .
*/
SCR_JUMPR ^ IFFALSE (MASK (HF_DP_SAVED, HF_DP_SAVED)),
8 ,
SCR_REG_REG (sfbr, SCR_XOR, HF_ACT_PM),
0 ,
/*
* If we have been interrupt in a PM DATA mini - script ,
* we take the return address from the corresponding
* saved area .
* This ensure the return address always points to the
* main DATA script for this transfer .
*/
SCR_JUMP ^ IFTRUE (MASK (0 , (HF_IN_PM0 | HF_IN_PM1))),
PADDR_B (pm_handle1),
SCR_JUMPR ^ IFFALSE (MASK (HF_IN_PM0, HF_IN_PM0)),
16 ,
SCR_LOAD_REL (ia, 4 ),
offsetof(struct sym_ccb, phys.pm0.ret),
SCR_JUMP,
PADDR_B (pm_save),
SCR_LOAD_REL (ia, 4 ),
offsetof(struct sym_ccb, phys.pm1.ret),
SCR_JUMP,
PADDR_B (pm_save),
}/*-------------------------< PM_HANDLE1 >-----------------------*/,{
/*
* Normal case .
* Update the return address so that it
* will point after the interrupted MOVE .
*/
SCR_REG_REG (ia, SCR_ADD, 8 ),
0 ,
SCR_REG_REG (ia1, SCR_ADDC, 0 ),
0 ,
}/*-------------------------< PM_SAVE >--------------------------*/,{
/*
* Clear all the flags that told us if we were
* interrupted in a PM DATA mini - script and / or
* we received a SAVE DP .
*/
SCR_SFBR_REG (HF_REG, SCR_AND, (~(HF_IN_PM0|HF_IN_PM1|HF_DP_SAVED))),
0 ,
/*
* Choose the current PM context .
*/
SCR_JUMP ^ IFTRUE (MASK (HF_ACT_PM, HF_ACT_PM)),
PADDR_B (pm1_save),
}/*-------------------------< PM0_SAVE >-------------------------*/,{
SCR_STORE_REL (ia, 4 ),
offsetof(struct sym_ccb, phys.pm0.ret),
/*
* If WSR bit is set , either UA and RBC may
* have to be changed whether the device wants
* to ignore this residue or not .
*/
SCR_FROM_REG (scntl2),
0 ,
SCR_CALL ^ IFTRUE (MASK (WSR, WSR)),
PADDR_B (pm_wsr_handle),
/*
* Save the remaining byte count , the updated
* address and the return address .
*/
SCR_STORE_REL (rbc, 4 ),
offsetof(struct sym_ccb, phys.pm0.sg.size),
SCR_STORE_REL (ua, 4 ),
offsetof(struct sym_ccb, phys.pm0.sg.addr),
/*
* Set the current pointer at the PM0 DATA mini - script .
*/
SCR_LOAD_ABS (ia, 4 ),
PADDR_B (pm0_data_addr),
}/*-------------------------< PM_SAVE_END >----------------------*/,{
SCR_STORE_REL (ia, 4 ),
offsetof(struct sym_ccb, phys.head.lastp),
SCR_JUMP,
PADDR_A (dispatch),
}/*-------------------------< PM1_SAVE >-------------------------*/,{
SCR_STORE_REL (ia, 4 ),
offsetof(struct sym_ccb, phys.pm1.ret),
/*
* If WSR bit is set , either UA and RBC may
* have to be changed whether the device wants
* to ignore this residue or not .
*/
SCR_FROM_REG (scntl2),
0 ,
SCR_CALL ^ IFTRUE (MASK (WSR, WSR)),
PADDR_B (pm_wsr_handle),
/*
* Save the remaining byte count , the updated
* address and the return address .
*/
SCR_STORE_REL (rbc, 4 ),
offsetof(struct sym_ccb, phys.pm1.sg.size),
SCR_STORE_REL (ua, 4 ),
offsetof(struct sym_ccb, phys.pm1.sg.addr),
/*
* Set the current pointer at the PM1 DATA mini - script .
*/
SCR_LOAD_ABS (ia, 4 ),
PADDR_B (pm1_data_addr),
SCR_JUMP,
PADDR_B (pm_save_end),
}/*-------------------------< PM_WSR_HANDLE >--------------------*/,{
/*
* Phase mismatch handling from SCRIPT with WSR set .
* Such a condition can occur if the chip wants to
* execute a CHMOV ( size > 1 ) when the WSR bit is
* set and the target changes PHASE .
*
* We must move the residual byte to memory .
*
* UA contains bit 0 . . 31 of the address to
* move the residual byte .
* Move it to the table indirect .
*/
SCR_STORE_REL (ua, 4 ),
offsetof (struct sym_ccb, phys.wresid.addr),
/*
* Increment UA ( move address to next position ) .
*/
SCR_REG_REG (ua, SCR_ADD, 1 ),
0 ,
SCR_REG_REG (ua1, SCR_ADDC, 0 ),
0 ,
SCR_REG_REG (ua2, SCR_ADDC, 0 ),
0 ,
SCR_REG_REG (ua3, SCR_ADDC, 0 ),
0 ,
/*
* Compute SCRATCHA as :
* - size to transfer = 1 byte .
* - bit 24 . . 31 = high address bit [ 32 . . . 39 ] .
*/
SCR_LOAD_ABS (scratcha, 4 ),
PADDR_B (zero),
SCR_REG_REG (scratcha, SCR_OR, 1 ),
0 ,
SCR_FROM_REG (rbc3),
0 ,
SCR_TO_REG (scratcha3),
0 ,
/*
* Move this value to the table indirect .
*/
SCR_STORE_REL (scratcha, 4 ),
offsetof (struct sym_ccb, phys.wresid.size),
/*
* Wait for a valid phase .
* While testing with bogus QUANTUM drives , the C1010
* sometimes raised a spurious phase mismatch with
* WSR and the CHMOV ( 1 ) triggered another PM .
* Waiting explicitly for the PHASE seemed to avoid
* the nested phase mismatch . Btw , this didn ' t happen
* using my IBM drives .
*/
SCR_JUMPR ^ IFFALSE (WHEN (SCR_DATA_IN)),
0 ,
/*
* Perform the move of the residual byte .
*/
SCR_CHMOV_TBL ^ SCR_DATA_IN,
offsetof (struct sym_ccb, phys.wresid),
/*
* We can now handle the phase mismatch with UA fixed .
* RBC [ 0 . . 23 ] = 0 is a special case that does not require
* a PM context . The C code also checks against this .
*/
SCR_FROM_REG (rbc),
0 ,
SCR_RETURN ^ IFFALSE (DATA (0 )),
0 ,
SCR_FROM_REG (rbc1),
0 ,
SCR_RETURN ^ IFFALSE (DATA (0 )),
0 ,
SCR_FROM_REG (rbc2),
0 ,
SCR_RETURN ^ IFFALSE (DATA (0 )),
0 ,
/*
* RBC [ 0 . . 23 ] = 0 .
* Not only we donnot need a PM context , but this would
* lead to a bogus CHMOV ( 0 ) . This condition means that
* the residual was the last byte to move from this CHMOV .
* So , we just have to move the current data script pointer
* ( i . e . TEMP ) to the SCRIPTS address following the
* interrupted CHMOV and jump to dispatcher .
* IA contains the data pointer to save .
*/
SCR_JUMP,
PADDR_B (pm_save_end),
}/*-------------------------< WSR_MA_HELPER >--------------------*/,{
/*
* Helper for the C code when WSR bit is set .
* Perform the move of the residual byte .
*/
SCR_CHMOV_TBL ^ SCR_DATA_IN,
offsetof (struct sym_ccb, phys.wresid),
SCR_JUMP,
PADDR_A (dispatch),
}/*-------------------------< ZERO >-----------------------------*/,{
SCR_DATA_ZERO,
}/*-------------------------< SCRATCH >--------------------------*/,{
SCR_DATA_ZERO,
}/*-------------------------< PM0_DATA_ADDR >--------------------*/,{
SCR_DATA_ZERO,
}/*-------------------------< PM1_DATA_ADDR >--------------------*/,{
SCR_DATA_ZERO,
}/*-------------------------< DONE_POS >-------------------------*/,{
SCR_DATA_ZERO,
}/*-------------------------< STARTPOS >-------------------------*/,{
SCR_DATA_ZERO,
}/*-------------------------< TARGTBL >--------------------------*/,{
SCR_DATA_ZERO,
}/*-------------------------<>-----------------------------------*/
};
static struct SYM_FWZ_SCR SYM_FWZ_SCR = {
/*-------------------------< SNOOPTEST >------------------------*/{
/*
* Read the variable from memory .
*/
SCR_LOAD_REL (scratcha, 4 ),
offsetof(struct sym_hcb, scratch),
/*
* Write the variable to memory .
*/
SCR_STORE_REL (temp, 4 ),
offsetof(struct sym_hcb, scratch),
/*
* Read back the variable from memory .
*/
SCR_LOAD_REL (temp, 4 ),
offsetof(struct sym_hcb, scratch),
}/*-------------------------< SNOOPEND >-------------------------*/,{
/*
* And stop .
*/
SCR_INT,
99 ,
}/*-------------------------<>-----------------------------------*/
};
Messung V0.5 in Prozent C=86 H=100 G=93
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(vorverarbeitet am 2026-10-01)
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