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/dev/mem works but driver readb does not

I have allocated some memory in a driver with request_mem_region and ioremap_nocache that cannot seem to read some of its addresses. The reads seem to either hang or crash (fault?). The funny thing is that if I go into user space and open /dev/mem, I can read these locations.

I'm using an XScale (ARM) and have set up the TLBs to include the entire region I want (I think). I'm still looking to verify the table... someone else did that bootloader and kernel work.

Any ideas as to why this could be happening?

Reply to
dc
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I have allocated some memory in a driver with request_mem_region and ioremap_nocache that cannot seem to read some of its addresses. The reads seem to either hang or crash (fault?). The funny thing is that if I go into user space and open /dev/mem, I can read these locations.

I'm using an XScale (ARM) and have set up the TLBs to include the entire region I want (I think). I'm still looking to verify the table... someone else did that bootloader and kernel work.

Any ideas as to why this could be happening?

Reply to
dc

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