From: Ayman El-Khashab <ayman@elkhashab.com>
To: linuxppc-dev@lists.ozlabs.org
Subject: Re: Problems mapping OCM memory from 460EX to user space
Date: Sat, 10 Jul 2010 23:14:18 -0500 [thread overview]
Message-ID: <4C39451A.201@elkhashab.com> (raw)
In-Reply-To: <20100707194846.GA724@crust.elkhashab.com>
On 7/7/2010 2:48 PM, ayman@austin.rr.com wrote:
> rc = io_remap_pfn_range(vma, PLB_OCM_BASE_ADDR>>PAGE_SHIFT, vma->vm_start, len, vma->vm_page_prot);
>
> I am fairly certain the physical address is correct, I've verified that the
> TLB entries in u-boot look ok. Any tips on how to make this work?
>
>
I found / fixed the issue. The first problem is that start and offset
are swapped in the io_remap_pfn_range invocation. The 2nd was that
there were some TLB changes that were needed to map the OCM.
prev parent reply other threads:[~2010-07-11 4:14 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-07 19:48 Problems mapping OCM memory from 460EX to user space ayman
2010-07-11 4:14 ` Ayman El-Khashab [this message]
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