Re: how to allocate 9MB of memory in kernel ?

On Tuesday 22 July 2008, Misbah khan wrote:

First of all let me thank you for your valuable suggessions ...

1. I wanted to allocate 9MB in kernel and wanted that memory to be mapped to
the physically continews SDRAM memory. but till now i could not found a way
to do so ???

2. So i thought to use ioremap to map SDRAM and make it accessible to user
using mmap technique but there is only one doubt and that is will it be
secure and stable and whether it is a right way of doing ???

As I have told you a few times now, you *either* allocate the memory *or*
ioremap it, NOT BOTH!!!

If you SDRAM is you main memory, you need vmalloc and remap_vmalloc_range.
If the SDRAM is not your main memory but some I/O attached buffer, you need
ioremap/of_iomap and remap_pfn_range.

	Arnd <><