Re: Symbios 53c770 driver

[Geert U. <ge...@li...>]

On Sun, 22 Oct 2000 fh...@at... wrote:
> In <Pine.LNX.4.10.10010181211150.841-100000@cassiopeia.home>, on 10/18/00 
>    at 12:46 PM, Geert Uytterhoeven <ge...@li...> said:
> 
> >On Tue, 17 Oct 2000 fh...@at... wrote:
> >> In <Pine.LNX.4.10.10010171602340.394-100000@cassiopeia.home>, on 10/17/00 
> >>    at 04:09 PM, Geert Uytterhoeven <ge...@li...> said:
> >> 
> >> >On Tue, 17 Oct 2000 fh...@at... wrote:
> >> >> So, have I got this right?  Setup has:
> >> >To find out that unknown location, you can replace the `7' by some easy
> >> >to find unique value (whatever that may mean, e.g. 0xdeadbeef or
> >> >0xdeadcode or 0xfAedbeef (looks like Fredbeef :-)) and search for it in
> >> >memory after running the DSP script.
> >> 
> >> How to I search the memory? grep deadcode /dev/kmem ?
> 
> >No, you search from 0xc0000000 to 0xc4000000 in your driver.
> 
> Never did figure out out to search memory by address in the
> driver.  Could you use a for loop with a readl() in it?

It's very simple:

    int *p;
    for (p = (int *)0xc0000000; p < (int *)0xc4000000; p++)
	if (*p == 0xxxxxxxxx)
	    printk("Match at %p\n", p);

If you want to catch unaligned occurrencies as well, it becomes a bit more
complex.

> I got the driver to pass the cache test finally.

Good! What exactly did you have to change?

> I also found out something interesting:  There is a limit as
> to how many printks you can have in a driver. :)

Really?

> Now hopefully I can get to more of the "fun" stuff.

Good luck!

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- ge...@li...

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds