718cf2ccb9
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
1872 lines
48 KiB
C
1872 lines
48 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Device driver optimized for the Symbios/LSI 53C896/53C895A/53C1010
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* PCI-SCSI controllers.
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*
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* Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr>
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*
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* This driver also supports the following Symbios/LSI PCI-SCSI chips:
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* 53C810A, 53C825A, 53C860, 53C875, 53C876, 53C885, 53C895,
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* 53C810, 53C815, 53C825 and the 53C1510D is 53C8XX mode.
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*
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*
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* This driver for FreeBSD-CAM is derived from the Linux sym53c8xx driver.
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* Copyright (C) 1998-1999 Gerard Roudier
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*
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* The sym53c8xx driver is derived from the ncr53c8xx driver that had been
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* a port of the FreeBSD ncr driver to Linux-1.2.13.
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*
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* The original ncr driver has been written for 386bsd and FreeBSD by
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* Wolfgang Stanglmeier <wolf@cologne.de>
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* Stefan Esser <se@mi.Uni-Koeln.de>
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* Copyright (C) 1994 Wolfgang Stanglmeier
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*
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* The initialisation code, and part of the code that addresses
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* FreeBSD-CAM services is based on the aic7xxx driver for FreeBSD-CAM
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* written by Justin T. Gibbs.
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*
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* Other major contributions:
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*
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* NVRAM detection and reading.
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* Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
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*
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*-----------------------------------------------------------------------------
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/* $FreeBSD$ */
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/*
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* Scripts for SYMBIOS-Processor
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*
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* We have to know the offsets of all labels before we reach
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* them (for forward jumps). Therefore we declare a struct
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* here. If you make changes inside the script,
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*
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* DONT FORGET TO CHANGE THE LENGTHS HERE!
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*/
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/*
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* Script fragments which are loaded into the on-chip RAM
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* of 825A, 875, 876, 895, 895A, 896 and 1010 chips.
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* Must not exceed 4K bytes.
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*/
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struct SYM_FWA_SCR {
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u32 start [ 14];
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u32 getjob_begin [ 4];
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u32 getjob_end [ 4];
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u32 select [ 8];
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u32 wf_sel_done [ 2];
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u32 sel_done [ 2];
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u32 send_ident [ 2];
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#ifdef SYM_CONF_IARB_SUPPORT
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u32 select2 [ 8];
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#else
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u32 select2 [ 2];
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#endif
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u32 command [ 2];
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u32 dispatch [ 28];
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u32 sel_no_cmd [ 10];
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u32 init [ 6];
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u32 clrack [ 4];
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u32 disp_status [ 4];
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u32 datai_done [ 26];
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u32 datao_done [ 12];
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u32 datai_phase [ 2];
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u32 datao_phase [ 4];
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u32 msg_in [ 2];
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u32 msg_in2 [ 10];
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#ifdef SYM_CONF_IARB_SUPPORT
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u32 status [ 14];
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#else
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u32 status [ 10];
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#endif
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u32 complete [ 8];
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u32 complete2 [ 12];
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u32 complete_error [ 4];
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u32 done [ 14];
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u32 done_end [ 2];
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u32 save_dp [ 8];
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u32 restore_dp [ 4];
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u32 disconnect [ 20];
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#ifdef SYM_CONF_IARB_SUPPORT
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u32 idle [ 4];
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#else
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u32 idle [ 2];
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#endif
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#ifdef SYM_CONF_IARB_SUPPORT
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u32 ungetjob [ 6];
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#else
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u32 ungetjob [ 4];
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#endif
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u32 reselect [ 4];
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u32 reselected [ 22];
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u32 resel_scntl4 [ 20];
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u32 resel_lun0 [ 6];
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#if SYM_CONF_MAX_TASK*4 > 512
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u32 resel_tag [ 26];
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#elif SYM_CONF_MAX_TASK*4 > 256
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u32 resel_tag [ 20];
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#else
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u32 resel_tag [ 16];
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#endif
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u32 resel_dsa [ 2];
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u32 resel_dsa1 [ 6];
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u32 resel_no_tag [ 6];
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u32 data_in [SYM_CONF_MAX_SG * 2];
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u32 data_in2 [ 4];
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u32 data_out [SYM_CONF_MAX_SG * 2];
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u32 data_out2 [ 4];
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u32 pm0_data [ 12];
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u32 pm0_data_out [ 6];
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u32 pm0_data_end [ 6];
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u32 pm1_data [ 12];
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u32 pm1_data_out [ 6];
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u32 pm1_data_end [ 6];
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};
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/*
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* Script fragments which stay in main memory for all chips
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* except for chips that support 8K on-chip RAM.
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*/
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struct SYM_FWB_SCR {
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u32 start64 [ 2];
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u32 no_data [ 2];
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u32 sel_for_abort [ 18];
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u32 sel_for_abort_1 [ 2];
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u32 msg_in_etc [ 12];
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u32 msg_received [ 4];
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u32 msg_weird_seen [ 4];
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u32 msg_extended [ 20];
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u32 msg_bad [ 6];
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u32 msg_weird [ 4];
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u32 msg_weird1 [ 8];
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u32 wdtr_resp [ 6];
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u32 send_wdtr [ 4];
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u32 sdtr_resp [ 6];
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u32 send_sdtr [ 4];
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u32 ppr_resp [ 6];
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u32 send_ppr [ 4];
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u32 nego_bad_phase [ 4];
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u32 msg_out [ 4];
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u32 msg_out_done [ 4];
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u32 data_ovrun [ 2];
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u32 data_ovrun1 [ 22];
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u32 data_ovrun2 [ 8];
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u32 abort_resel [ 16];
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u32 resend_ident [ 4];
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u32 ident_break [ 4];
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u32 ident_break_atn [ 4];
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u32 sdata_in [ 6];
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u32 resel_bad_lun [ 4];
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u32 bad_i_t_l [ 4];
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u32 bad_i_t_l_q [ 4];
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u32 bad_status [ 6];
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u32 pm_handle [ 20];
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u32 pm_handle1 [ 4];
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u32 pm_save [ 4];
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u32 pm0_save [ 14];
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u32 pm1_save [ 14];
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/* WSR handling */
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u32 pm_wsr_handle [ 42];
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u32 wsr_ma_helper [ 4];
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/* Data area */
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u32 zero [ 1];
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u32 scratch [ 1];
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u32 pm0_data_addr [ 1];
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u32 pm1_data_addr [ 1];
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u32 saved_dsa [ 1];
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u32 saved_drs [ 1];
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u32 done_pos [ 1];
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u32 startpos [ 1];
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u32 targtbl [ 1];
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/* End of data area */
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u32 snooptest [ 6];
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u32 snoopend [ 2];
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};
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static const struct SYM_FWA_SCR SYM_FWA_SCR = {
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/*--------------------------< START >----------------------------*/ {
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/*
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* Switch the LED on.
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* Will be patched with a NO_OP if LED
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* not needed or not desired.
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*/
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SCR_REG_REG (gpreg, SCR_AND, 0xfe),
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0,
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/*
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* Clear SIGP.
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*/
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SCR_FROM_REG (ctest2),
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0,
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/*
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* Stop here if the C code wants to perform
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* some error recovery procedure manually.
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* (Indicate this by setting SEM in ISTAT)
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*/
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SCR_FROM_REG (istat),
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0,
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/*
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* Report to the C code the next position in
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* the start queue the SCRIPTS will schedule.
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* The C code must not change SCRATCHA.
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*/
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SCR_LOAD_ABS (scratcha, 4),
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PADDR_B (startpos),
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SCR_INT ^ IFTRUE (MASK (SEM, SEM)),
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SIR_SCRIPT_STOPPED,
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/*
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* Start the next job.
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*
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* @DSA = start point for this job.
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* SCRATCHA = address of this job in the start queue.
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*
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* We will restore startpos with SCRATCHA if we fails the
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* arbitration or if it is the idle job.
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*
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* The below GETJOB_BEGIN to GETJOB_END section of SCRIPTS
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* is a critical path. If it is partially executed, it then
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* may happen that the job address is not yet in the DSA
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* and the next queue position points to the next JOB.
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*/
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SCR_LOAD_ABS (dsa, 4),
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PADDR_B (startpos),
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SCR_LOAD_REL (temp, 4),
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4,
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}/*-------------------------< GETJOB_BEGIN >---------------------*/,{
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SCR_STORE_ABS (temp, 4),
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PADDR_B (startpos),
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SCR_LOAD_REL (dsa, 4),
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0,
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}/*-------------------------< GETJOB_END >-----------------------*/,{
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SCR_LOAD_REL (temp, 4),
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0,
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SCR_RETURN,
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0,
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}/*-------------------------< SELECT >---------------------------*/,{
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/*
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* DSA contains the address of a scheduled
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* data structure.
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*
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* SCRATCHA contains the address of the start queue
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* entry which points to the next job.
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*
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* Set Initiator mode.
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*
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* (Target mode is left as an exercise for the reader)
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*/
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SCR_CLR (SCR_TRG),
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0,
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/*
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* And try to select this target.
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*/
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SCR_SEL_TBL_ATN ^ offsetof (struct sym_dsb, select),
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PADDR_A (ungetjob),
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/*
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* Now there are 4 possibilities:
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*
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* (1) The chip loses arbitration.
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* This is ok, because it will try again,
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* when the bus becomes idle.
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* (But beware of the timeout function!)
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*
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* (2) The chip is reselected.
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* Then the script processor takes the jump
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* to the RESELECT label.
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*
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* (3) The chip wins arbitration.
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* Then it will execute SCRIPTS instruction until
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* the next instruction that checks SCSI phase.
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* Then will stop and wait for selection to be
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* complete or selection time-out to occur.
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*
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* After having won arbitration, the SCRIPTS
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* processor is able to execute instructions while
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* the SCSI core is performing SCSI selection.
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*/
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/*
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* load the savep (saved data pointer) into
|
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* the actual data pointer.
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*/
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SCR_LOAD_REL (temp, 4),
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offsetof (struct sym_ccb, phys.head.savep),
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/*
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* Initialize the status registers
|
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*/
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SCR_LOAD_REL (scr0, 4),
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offsetof (struct sym_ccb, phys.head.status),
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}/*-------------------------< WF_SEL_DONE >----------------------*/,{
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SCR_INT ^ IFFALSE (WHEN (SCR_MSG_OUT)),
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SIR_SEL_ATN_NO_MSG_OUT,
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}/*-------------------------< SEL_DONE >-------------------------*/,{
|
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/*
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* C1010-33 errata work-around.
|
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* Due to a race, the SCSI core may not have
|
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* loaded SCNTL3 on SEL_TBL instruction.
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* We reload it once phase is stable.
|
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* Patched with a NOOP for other chips.
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*/
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SCR_LOAD_REL (scntl3, 1),
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offsetof(struct sym_dsb, select.sel_scntl3),
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}/*-------------------------< SEND_IDENT >-----------------------*/,{
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/*
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* Selection complete.
|
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* Send the IDENTIFY and possibly the TAG message
|
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* and negotiation message if present.
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*/
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SCR_MOVE_TBL ^ SCR_MSG_OUT,
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offsetof (struct sym_dsb, smsg),
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}/*-------------------------< SELECT2 >--------------------------*/,{
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#ifdef SYM_CONF_IARB_SUPPORT
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/*
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* Set IMMEDIATE ARBITRATION if we have been given
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* a hint to do so. (Some job to do after this one).
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*/
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SCR_FROM_REG (HF_REG),
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0,
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SCR_JUMPR ^ IFFALSE (MASK (HF_HINT_IARB, HF_HINT_IARB)),
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8,
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SCR_REG_REG (scntl1, SCR_OR, IARB),
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0,
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#endif
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/*
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* Anticipate the COMMAND phase.
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* This is the PHASE we expect at this point.
|
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*/
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SCR_JUMP ^ IFFALSE (WHEN (SCR_COMMAND)),
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PADDR_A (sel_no_cmd),
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}/*-------------------------< COMMAND >--------------------------*/,{
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/*
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* ... and send the command
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*/
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SCR_MOVE_TBL ^ SCR_COMMAND,
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offsetof (struct sym_dsb, cmd),
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}/*-------------------------< DISPATCH >-------------------------*/,{
|
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/*
|
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* MSG_IN is the only phase that shall be
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* entered at least once for each (re)selection.
|
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* So we test it first.
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*/
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SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_IN)),
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PADDR_A (msg_in),
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SCR_JUMP ^ IFTRUE (IF (SCR_DATA_OUT)),
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PADDR_A (datao_phase),
|
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SCR_JUMP ^ IFTRUE (IF (SCR_DATA_IN)),
|
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PADDR_A (datai_phase),
|
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SCR_JUMP ^ IFTRUE (IF (SCR_STATUS)),
|
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PADDR_A (status),
|
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SCR_JUMP ^ IFTRUE (IF (SCR_COMMAND)),
|
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PADDR_A (command),
|
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SCR_JUMP ^ IFTRUE (IF (SCR_MSG_OUT)),
|
|
PADDR_B (msg_out),
|
|
/*
|
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* Discard as many illegal phases as
|
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* required and tell the C code about.
|
|
*/
|
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SCR_JUMPR ^ IFFALSE (WHEN (SCR_ILG_OUT)),
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16,
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SCR_MOVE_ABS (1) ^ SCR_ILG_OUT,
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HADDR_1 (scratch),
|
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SCR_JUMPR ^ IFTRUE (WHEN (SCR_ILG_OUT)),
|
|
-16,
|
|
SCR_JUMPR ^ IFFALSE (WHEN (SCR_ILG_IN)),
|
|
16,
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|
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),
|
|
}/*-------------------------< DISP_STATUS >----------------------*/,{
|
|
/*
|
|
* Anticipate STATUS phase.
|
|
*
|
|
* Does spare 3 SCRIPTS instructions when we have
|
|
* completed the INPUT of the data.
|
|
*/
|
|
SCR_JUMP ^ IFTRUE (WHEN (SCR_STATUS)),
|
|
PADDR_A (status),
|
|
SCR_JUMP,
|
|
PADDR_A (dispatch),
|
|
}/*-------------------------< DATAI_DONE >-----------------------*/,{
|
|
/*
|
|
* If the device still wants to send us data,
|
|
* we must count the extra bytes.
|
|
*/
|
|
SCR_JUMP ^ IFTRUE (WHEN (SCR_DATA_IN)),
|
|
PADDR_B (data_ovrun),
|
|
/*
|
|
* If the SWIDE is not full, jump to dispatcher.
|
|
* We anticipate a STATUS phase.
|
|
*/
|
|
SCR_FROM_REG (scntl2),
|
|
0,
|
|
SCR_JUMP ^ IFFALSE (MASK (WSR, WSR)),
|
|
PADDR_A (disp_status),
|
|
/*
|
|
* 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 (disp_status),
|
|
/*
|
|
* 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 (disp_status),
|
|
}/*-------------------------< DATAO_DONE >-----------------------*/,{
|
|
/*
|
|
* If the device wants us to send more data,
|
|
* we must count the extra bytes.
|
|
*/
|
|
SCR_JUMP ^ IFTRUE (WHEN (SCR_DATA_OUT)),
|
|
PADDR_B (data_ovrun),
|
|
/*
|
|
* If the SODL is not full jump to dispatcher.
|
|
* We anticipate a STATUS phase.
|
|
*/
|
|
SCR_FROM_REG (scntl2),
|
|
0,
|
|
SCR_JUMP ^ IFFALSE (MASK (WSS, WSS)),
|
|
PADDR_A (disp_status),
|
|
/*
|
|
* 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 >----------------------*/,{
|
|
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,
|
|
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.
|
|
*
|
|
* Copy the data pointer to LASTP.
|
|
*/
|
|
SCR_STORE_REL (temp, 4),
|
|
offsetof (struct sym_ccb, phys.head.lastp),
|
|
/*
|
|
* 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_JUMPR ^ IFTRUE (MASK (0 ,(HF_SENSE|HF_EXT_ERR))),
|
|
16,
|
|
}/*-------------------------< COMPLETE_ERROR >-------------------*/,{
|
|
SCR_LOAD_ABS (scratcha, 4),
|
|
PADDR_B (startpos),
|
|
SCR_INT,
|
|
SIR_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 (saved_dsa),
|
|
SCR_LOAD_ABS (dsa, 4),
|
|
PADDR_B (done_pos),
|
|
SCR_LOAD_ABS (scratcha, 4),
|
|
PADDR_B (saved_dsa),
|
|
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 (temp, 4),
|
|
4,
|
|
SCR_INT_FLY,
|
|
0,
|
|
SCR_STORE_ABS (temp, 4),
|
|
PADDR_B (done_pos),
|
|
}/*-------------------------< DONE_END >-------------------------*/,{
|
|
SCR_JUMP,
|
|
PADDR_A (start),
|
|
}/*-------------------------< 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 the data pointer to SAVEP.
|
|
*/
|
|
SCR_STORE_REL (temp, 4),
|
|
offsetof (struct sym_ccb, phys.head.savep),
|
|
SCR_JUMP,
|
|
PADDR_A (dispatch),
|
|
}/*-------------------------< RESTORE_DP >-----------------------*/,{
|
|
/*
|
|
* RESTORE_DP message:
|
|
* Copy SAVEP to actual data pointer.
|
|
*/
|
|
SCR_LOAD_REL (temp, 4),
|
|
offsetof (struct sym_ccb, phys.head.savep),
|
|
SCR_JUMP,
|
|
PADDR_A (clrack),
|
|
}/*-------------------------< 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),
|
|
/*
|
|
* If QUIRK_AUTOSAVE is set,
|
|
* do a "save pointer" operation.
|
|
*/
|
|
SCR_FROM_REG (QU_REG),
|
|
0,
|
|
SCR_JUMP ^ IFFALSE (MASK (SYM_QUIRK_AUTOSAVE, SYM_QUIRK_AUTOSAVE)),
|
|
PADDR_A (start),
|
|
/*
|
|
* like SAVE_DP message:
|
|
* Remember we saved the data pointer.
|
|
* Copy data pointer to SAVEP.
|
|
*/
|
|
SCR_REG_REG (HF_REG, SCR_OR, HF_DP_SAVED),
|
|
0,
|
|
SCR_STORE_REL (temp, 4),
|
|
offsetof (struct sym_ccb, phys.head.savep),
|
|
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 >-------------------------*/,{
|
|
/*
|
|
* Make sure we are in initiator mode.
|
|
*/
|
|
SCR_CLR (SCR_TRG),
|
|
0,
|
|
/*
|
|
* 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 >-----------------------*/,{
|
|
/*
|
|
* load the savep (saved pointer) into
|
|
* the actual data pointer.
|
|
*/
|
|
SCR_LOAD_REL (temp, 4),
|
|
offsetof (struct sym_ccb, phys.head.savep),
|
|
/*
|
|
* 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 const struct 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.
|
|
*/
|
|
|
|
/*
|
|
* Set initiator mode.
|
|
*/
|
|
SCR_CLR (SCR_TRG),
|
|
0,
|
|
/*
|
|
* 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 (temp, 4),
|
|
PADDR_B (pm0_data_addr),
|
|
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 (temp, 4),
|
|
PADDR_B (pm1_data_addr),
|
|
SCR_JUMP,
|
|
PADDR_A (dispatch),
|
|
}/*-------------------------< 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 explicitely 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.
|
|
*/
|
|
SCR_STORE_ABS (ia, 4),
|
|
PADDR_B (scratch),
|
|
SCR_LOAD_ABS (temp, 4),
|
|
PADDR_B (scratch),
|
|
SCR_JUMP,
|
|
PADDR_A (dispatch),
|
|
}/*-------------------------< 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,
|
|
}/*-------------------------< SAVED_DSA >------------------------*/,{
|
|
SCR_DATA_ZERO,
|
|
}/*-------------------------< SAVED_DRS >------------------------*/,{
|
|
SCR_DATA_ZERO,
|
|
}/*-------------------------< DONE_POS >-------------------------*/,{
|
|
SCR_DATA_ZERO,
|
|
}/*-------------------------< STARTPOS >-------------------------*/,{
|
|
SCR_DATA_ZERO,
|
|
}/*-------------------------< TARGTBL >--------------------------*/,{
|
|
SCR_DATA_ZERO,
|
|
|
|
}/*-------------------------< SNOOPTEST >------------------------*/,{
|
|
/*
|
|
* Read the variable from memory.
|
|
*/
|
|
SCR_LOAD_REL (scratcha, 4),
|
|
offsetof(struct sym_hcb, cache),
|
|
/*
|
|
* Write the variable to memory.
|
|
*/
|
|
SCR_STORE_REL (temp, 4),
|
|
offsetof(struct sym_hcb, cache),
|
|
/*
|
|
* Read back the variable from memory.
|
|
*/
|
|
SCR_LOAD_REL (temp, 4),
|
|
offsetof(struct sym_hcb, cache),
|
|
}/*-------------------------< SNOOPEND >-------------------------*/,{
|
|
/*
|
|
* And stop.
|
|
*/
|
|
SCR_INT,
|
|
99,
|
|
}/*-------------------------<>-----------------------------------*/
|
|
};
|