Date: Mon, 08 Dec 1997 09:01:19 +0900 From: Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp> To: Joao Carlos Mendes Luis <jonny@coppe.ufrj.br> Cc: cvs-committers@freebsd.org, cvs-all@freebsd.org, cvs-sys@freebsd.org, hackers@freebsd.org, yokota@zodiac.mech.utsunomiya-u.ac.jp Subject: Re: cvs commit: src/sys/i386/conf LINT src/sys/i386/include console.h mouse.h src/sys/i386/isa kbdio.h mse.c psm.c syscons.c Message-ID: <199712080001.JAA28710@zodiac.mech.utsunomiya-u.ac.jp> In-Reply-To: Your message of "Sun, 07 Dec 1997 15:25:33 -0200." <199712071725.PAA17469@gaia.coppe.ufrj.br> References: <199712071725.PAA17469@gaia.coppe.ufrj.br>
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>// - The `psm' driver is made to recognize various models of PS/2 mice
>// and enable their extra features so that their additional buttons and
>// wheel/roller are recognized. The name of the detected model will be
>// printed at boot time.
>
>How much memory does this model info waste ?
int*5 = 20 bytes
>I don't like the ideia of using kernel memory (which cannot yet be
>swapped out) for something almost useless.
In general, I agree that the kernel shouldn't waste memory. But, the
`psm' driver's info is NOT useless. I didn't add it just for fun. It
is used by `moused' and possibly by the X server (I have contacted
XFree86 people on this issue).
Recent PS/2 mice with wheels and additional buttons use vairous
proprietary data formats to report wheel/button events. Therefore it
is essential to know which model of mice is attached to the system in
order to decode mouse data.
>This (and also the VGA type info) could be in some memory area that
~~~~~~~~~~~~~~~~~
Which info are you talking about? I don't think the console driver
currently distinguishes VGA types.
>could later be released for VM usage. Something like pre-alocated
>VM pages, disposable after booting.
>
> Jonny
Kazu
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