BOUNCE rtl@rtlinux.org: Approval required: Non-member submissionfrom ["Norm Dresner" <ndrez@att.net>] (fwd)

[Der Herr Hofrat <der.herr@hofr.at>]

>From owner-rtl Thu May 17 19:02:25 2001
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From: "Norm Dresner" <ndrez@att.net>
To: "rtlinux" <rtl@rtlinux.org>
References: <sb040da9.099@fayat-genest.fr>
Subject: Re: [rtl] Shared memory with Lilo and __va()
Date: Thu, 17 May 2001 20:57:00 -0400
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What kernel version?  If it's 2.2.x or later, you need to call ioremap() to
get a virtual address to use.

    Norm

----- Original Message -----
From: Marc LE DOUARAIN <mledouarain@garbarini.com>
To: <rtl@fsmlabs.com>
Cc: Patrick VIGOT <pvigot@garbarini.com>
Sent: Thursday, May 17, 2001 12:02 PM
Subject: [rtl] Shared memory with Lilo and __va()


> Hello,
>
> I've tried sharing memory on RTLinux as explained in the Shared Memory
HOWTO :
>
> I've 64Megs RAM on the computer...
> With Lilo, I set to use only 31m with append="mem=31m"
>
> I do the following define :
> #define ADDRESS (31*0x100000)
>
> In the real-time module , I have the following :
> my_structure * Params = ADDRESS;
>
> And when I insmod the real-time module, I get the following error :
> "Unable to handle kernel paging request"
>
> Any idea?
>
>
> I've tried the same code on another computer (128Megs RAM) using also 31m
with Lilo, and all is working perfectly...
>
> I've tried on the first computer with incorrect #define ADDRESS
(5*0x100000), strange, I've no more the error, but datas seems not to be
shared...
>
> Many Thanks.
>
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