/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 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 386bsd 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 used at initialisations. * Only runs out of main memory.
*/ struct SYM_FWZ_SCR {
u32 snooptest [ 6];
u32 snoopend [ 2];
};
staticstruct 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, 0xfe),
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 2nd 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, 0x7f),
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, 0x7f),
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, 0x01),
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, 0xff),
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, 0xfe),
0, /* * load the target id into the sdid
*/
SCR_REG_SFBR (ssid, SCR_AND, 0x8F),
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, 0x3c),
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 (0x80, 0xbf)),
PADDR_A (resel_lun0), /* * If message isn't an IDENTIFY, * tell the C code about.
*/
SCR_INT ^ IFFALSE (MASK (0x80, 0x80)),
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, 0xfc),
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, 0xfc),
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,
}/*-------------------------<>-----------------------------------*/
};
staticstruct SYM_FWB_SCR SYM_FWB_SCR = { /*--------------------------< START64 >--------------------------*/ { /* * SCRIPT entry point for the 895A, 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, 0x7f),
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 (0x00, 0xf0)),
PADDR_B (msg_received),
SCR_JUMP ^ IFTRUE (MASK (0x10, 0xf0)),
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 (0x20, 0xf0)),
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, 0x01),
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, 0x7f),
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 (1rst 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),
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