From: Misbah khan <misbah_khan@engineer.com>
To: linuxppc-embedded@ozlabs.org
Subject: Re: Kmalloc returns which address
Date: Sun, 22 Jul 2007 20:47:47 -0700 (PDT) [thread overview]
Message-ID: <11737504.post@talk.nabble.com> (raw)
In-Reply-To: <469B92DC.50609@freescale.com>
hi Scott
yes really it would really generate a machine check... but i guess if you
convert this virt address to physical address using __pa() then pass it to
the ioremap() i guess things will work .
Please correct me if i am wrong
regard
misbah
Scott Wood-2 wrote:
>
> suresh suresh wrote:
>> I want know the address return by kmalloc function? is it physical
>> address
>> or kernel virtual address.
>
> Kernel virtual.
>
>> For Tx and Rx, hardware uses buffers, so I have to allocate buffers and
>> pass
>> the pointer to hardware. Can I pass the pointer returned kmalloc? or I
>> should convert it into physical address?
>
> You need to convert it; read Documentation/DMA-mapping.txt.
>
> -Scott
> _______________________________________________
> Linuxppc-embedded mailing list
> Linuxppc-embedded@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-embedded
>
>
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next prev parent reply other threads:[~2007-07-23 3:47 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-16 13:59 Kmalloc returns which address suresh suresh
2007-07-16 15:46 ` Scott Wood
2007-07-23 3:47 ` Misbah khan [this message]
2007-07-23 18:35 ` Scott Wood
2007-07-24 7:03 ` Misbah khan
2007-07-20 10:52 ` Misbah khan
2007-07-20 12:13 ` Alessandro Rubini
2007-07-20 16:58 ` Scott Wood
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