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From: "Justin T. Gibbs" <gibbs@FreeBSD.ORG>
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	Sat, 27 Sep 1997 12:38:32 -0700 (PDT)
Date: Sat, 27 Sep 1997 12:38:32 -0700 (PDT)
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To: cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG, cvs-sys@FreeBSD.ORG
Subject: cvs commit: src/sys/dev/aic7xxx Makefile aic7xxx.reg aic7xxx.seq
         aicasm_gram.y aicasm_scan.l aicasm_symbol.c aicasm_symbol.h
         sequencer.h src/sys/i386/scsi aic7xxx.c
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gibbs       1997/09/27 12:38:32 PDT

  Modified files:
    sys/dev/aic7xxx      Makefile aic7xxx.reg aic7xxx.seq 
                         aicasm_gram.y aicasm_scan.l 
                         aicasm_symbol.c aicasm_symbol.h 
                         sequencer.h 
  Log:
  Add support to aicasm for "downloaded constants".  These are immediate
  operands that are set during seqeuncer program download instead of at
  assembly time.
  
  Convert the sequencer code to use" downloaded constants" for four run time
  constants that vary depending on the board type.  This frees up 4 bytes
  of sequencer scratch ram space where these constants used to be stored and
  also removes the additional instructions required to load their values
  into the accumulator prior to using them.
  
  Remove the REJBYTE sram variable.  The host driver can just as easly
  read the accumulator to get this value.
  
  The scratch ram savings is important as the old code used to clober the
  SCSICONF register on 274X cards which sits near the top of scratch ram
  space.  The SCSICONF register controls bus termination, and clobbering
  it is not a good thing.  Now we have 4 bytes to spare.
  
  This should fix the reported problems with cards that don't have devices
  attached to them failing with a stream of "Somone reset bus X" messages.
  
  Doug Ledford determined the cause of the problem, fixes by me.
  
  Revision  Changes    Path
  1.4       +8 -1      src/sys/dev/aic7xxx/Makefile
  1.6       +16 -37    src/sys/dev/aic7xxx/aic7xxx.reg
  1.76      +5 -10     src/sys/dev/aic7xxx/aic7xxx.seq
  1.4       +59 -3     src/sys/dev/aic7xxx/aicasm_gram.y
  1.5       +2 -1      src/sys/dev/aic7xxx/aicasm_scan.l
  1.4       +23 -1     src/sys/dev/aic7xxx/aicasm_symbol.c
  1.3       +2 -1      src/sys/dev/aic7xxx/aicasm_symbol.h
  1.3       +2 -1      src/sys/dev/aic7xxx/sequencer.h

  Modified files:
    sys/i386/scsi        aic7xxx.c 
  Log:
  Add support to the host driver for "downloaded constants".  These are immediate
  operands that are set during seqeuncer program download instead of at
  assembly time.
  
  Remove the REJBYTE sram variable.  The host driver can just as easly
  read the accumulator to get this value.
  
  This should fix the reported problems with cards that don't have devices
  attached to them failing with a stream of "Somone reset bus X" messages.
  
  Doug Ledford determined the cause of the problem, fixes by me.
  
  Revision  Changes    Path
  1.126     +32 -43    src/sys/i386/scsi/aic7xxx.c