address@hidden: [patch] fixed serial handling in gnumach]

[Roland McGrath]

Has anybody tried this patch out on their gnumach?  A good test would be to
hook up your test machine's two serial ports with a null modem cable and
see if you can write data to one and read it from the other at high baud rates.

> --- Begin Message ---
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>
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> Subject: 
>
> [patch] fixed serial handling in gnumach
>
>
>
>
> Date: 
>
> Fri, 19 Oct 2001 21:44:28 +0200
>
>
>
>
> User-agent: 
>
> Mutt/1.2.5i
>
>
>
>
> Hi,
>
>   I finally fixed gnumach so it can handle sustained transfert on serial
> port at higher speed. On my PC works great so I'm posting the patch for any
> brave guys who want test it on their PC.
>
>   I hope to see the patch applied to the official gnumach soon, so I don't
> have to manually apply to any new version of gnumach.
>
> diff -u -r1.3 chario.c
> --- device/chario.c     2001/04/29 20:29:29     1.3
> +++ device/chario.c     2001/10/19 19:37:20
> @@ -55,8 +55,8 @@
>   * is greater than largest tthiwat entry.
>   */
>  short  tthiwat[NSPEEDS] =
> -   { 100,100,100,100,100,100,100,200,200,400,400,400,650,650,1300,2000,
> -     2000,2000 };
> +   { 100,100,100,100,100,100,100,200,200,400,400,400,650,650,1024,1024,
> +     1024,1024 };
>  short  ttlowat[NSPEEDS] =
>     {  30, 30, 30, 30, 30, 30, 30, 50, 50,120,120,120,125,125, 125, 125,
>       125,125 };
> @@ -122,8 +122,8 @@
>    pdma_timeouts[B2400] = _PR(240);
>    pdma_timeouts[B4800] = _PR(480);
>    pdma_timeouts[B9600] = _PR(960);
> -  pdma_timeouts[EXTA]  = _PR(1440); /* >14400 baud */
> -  pdma_timeouts[EXTB]  = _PR(1920); /* >19200 baud */
> +  pdma_timeouts[B19200]  = _PR(1920); /* >14400 baud */
> +  pdma_timeouts[B38400]  = _PR(3840); /* >19200 baud */
>    pdma_timeouts[B57600] = _PR(5760);
>    pdma_timeouts[B115200] = _PR(11520);
>  
> @@ -143,13 +143,21 @@
>    pdma_water_mark[B1800] = _PR(180);
>    pdma_water_mark[B2400] = _PR(240);
>    pdma_water_mark[B4800] = _PR(480);
> +  pdma_water_mark[B9600] = _PR(960);
> +  pdma_water_mark[B19200] = _PR(1920);
> +  pdma_water_mark[B38400] = 192;
> +  pdma_water_mark[B57600] = 96;
> +  pdma_water_mark[B115200] = 64;
> +   
> +#if 0   
>    i = tty_inq_size/2;
>    pdma_water_mark[B9600] = i;
>    pdma_water_mark[EXTA]  = i; /* >14400 baud */
>    pdma_water_mark[EXTB]  = i; /* >19200 baud */
>    pdma_water_mark[B57600] = i;
>    pdma_water_mark[B115200] = i;
> -
> +#endif
> +   
>    return;
>  }
>  
>
> -- 
> Saluti / Regards
>
> Diego Roversi | diegor at maganet.net
>               | diegor at tiscalinet.it 
>
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> --- End Message ---