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From: Marcin Glogowski <marcin.glogowski@interia.pl>
To: linux-kernel@vger.kernel.org
Subject: ioremap - simply question, big problem (to me)
Date: Sat, 02 Apr 2005 09:42:32 +0200	[thread overview]
Message-ID: <424E4CE8.4070702@interia.pl> (raw)

Hi everybody,

I have several questions about ioremap:

1) I have two 16 bit sram memory devices. To force it works I had to use 
ioremap with memorysize*2, because
I was able to write to the 1 and 2 byte, 5,6, 9,10, 13,14 and so on.
Please explain why my ioremap space is non-continous,
how to ioremap a 32 bit device that consists of 2 16 bit devices? (in 
another system I simply copied the 16 bits to first device and another 
16 bits
to the second device and I had a working system) and why in the remapped 
memory are holes?

2) In my another system to get a value of the register from a flash 
device I had to use "volatile u16 the_address_of_my_device".
How to get the value in the case when Linux has virtual remapped the 
physical address?

Thank you.

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                 reply	other threads:[~2005-04-02  7:42 UTC|newest]

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