Thanks Eric
El 28/01/2015 a las 11:29, Eric Bénard escribió:
Hi Jose,
Le Wed, 28 Jan 2015 11:00:40 +0100,
Jose Mª Ferreriro Carnota<[email protected]> a écrit :
I was derived here from :
https://community.freescale.com/message/473511#473511
My kernel stops loading when I try to access to registers in
mach-imx6q.c. I think it has something to do with iMX6 security system.
Access to that registers at that moment seems to be denied and the
kernel load crashes.
you code is wrong : you can't access the physical memory as there is
MMU. You can check in the code how this is done.
The following link may me also be of interest :
http://www.makelinux.net/ldd3/chp-9-sect-4
meta-fsl-arm is not the right place for this kind of generic
kernel question, you should ask on kernel related mailing lists such as
for ARM :
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
for beginners :
http://kernelnewbies.org/ML
Best regards
Eric
I used the request_mem_region, ioremap and ioread32 process .. and
kernel keeps hanging if I try to use the ioread32 funtion.
Then I traced calls to __request_region on kernel/resource.c. IPU driver
is calling this in a different way:
platform_get_resource(pdev, IORESOURCE_MEM, 0);
devm_request_mem_region(&pdev->dev, res->start, resource_size(res),
pdev->name);
I am going to redirect this to linux-arm-kernel and see if I can use
this other method.
Best regards,
Jose
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