Re: sun4v_data_access_exception during access to hardware

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



From: "Alex Mach" <alexvm12e@xxxxxxx>
Date: Tue, 18 May 2010 17:41:06 +0400

> 
>> This driver is terribly non-portable and needs some work before you'll
>> be able to use it on sparc64.
> 
> Could you call any driver that was succesfully ported on Sparc and
> which use access to physical IO space, please?

Only drivers/net/niu.c does, it does the physical address handling
by hand.

You can't use the DMA interfaces because dma_addr_t is 32-bits and
there is no reason to bloat up the kernel by making it 64-bits
just for one or two drivers that want to work with real physical
addresses instead of DMA addresses.
--
To unsubscribe from this list: send the line "unsubscribe sparclinux" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html

[Index of Archives]     [Kernel Development]     [DCCP]     [Linux ARM Development]     [Linux]     [Photo]     [Yosemite Help]     [Linux ARM Kernel]     [Linux SCSI]     [Linux x86_64]     [Linux Hams]

  Powered by Linux