Problem with mmap() & noncached memory

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Last Post 07 Dec 2004 04:29 PM by Anonymous

Problem with mmap() & noncached memory

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miriam@rapportincorporated.com

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24 Aug 2004 12:28 PM
How do I memory map(mmap()) a region to user space as noncachable memory? The problem appears to be that the system has mapped the memory range as cacheable and caching needs to be disabled. I have written a device driver that exports a mmap() function that maps the appropriate region as follows- if (remap_page_range(vma->vm_start, offset, vma->vm_end - vma->vm_start, pgprot_noncached(vma->vm_page_prot))) return -EAGAIN; Any help would be greatly appreciated...

Anonymous
Posts:

07 Dec 2004 04:29 PM
m, Please keep in mind that Logic's Linux port is meant as a starting point only. It is not what could be considered production ready. If you need assistance with certain driver or BSP work it might be good to contact productsales@logicpd.com to set up a contract to get some of this work done if it is still troubling you. Regards, Platform Support

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