4 messages, 2 authors, 2007-10-23 · open the first message on its own page
From: Misbah khan <hidden>
Date: 2007-10-22 10:03:08
Hi all Could you Please let me know what is the difference between ioremap() and phy_to_virt() function being provided by the Kernel. --Misbah -- View this message in context: http://www.nabble.com/Difference-between-ioremap%28%29-and-phy_to_virt%28%29-Kernel-function-tf4669833.html#a13339930 Sent from the linuxppc-embedded mailing list archive at Nabble.com.
From: Arnd Bergmann <arnd@arndb.de>
Date: 2007-10-22 11:05:35
On Monday 22 October 2007, Misbah khan wrote:
Could you Please let me know what is the difference between ioremap() and phy_to_virt() function being provided by the Kernel.
ioremap gives you a new mapping for I/O addresses that you can access with functions like in_be32 and the like. phy_to_virt() is rarely used at all, it only serves to convert a physical address for main memory (RAM) into the address used inside of the kernel. Arnd <><
From: Misbah khan <hidden>
Date: 2007-10-23 04:08:23
Thanks Arnd But i wish to know that could i use phy_to_virt() function in place io ioremap() ????? And could you give me an example where we could use phy_to_virt(). ioremap() implementation i have already done. ---Misbah Arnd Bergmann wrote:
On Monday 22 October 2007, Misbah khan wrote:quoted
Could you Please let me know what is the difference between ioremap() and phy_to_virt() function being provided by the Kernel.ioremap gives you a new mapping for I/O addresses that you can access with functions like in_be32 and the like. phy_to_virt() is rarely used at all, it only serves to convert a physical address for main memory (RAM) into the address used inside of the kernel. Arnd <>< _______________________________________________ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded
-- View this message in context: http://www.nabble.com/Difference-between-ioremap%28%29-and-phy_to_virt%28%29-Kernel-function-tf4669833.html#a13357088 Sent from the linuxppc-embedded mailing list archive at Nabble.com.
From: Arnd Bergmann <arnd@arndb.de>
Date: 2007-10-23 09:17:49
On Tuesday 23 October 2007, Misbah khan wrote:
But i wish to know that could i use phy_to_virt() function in place io ioremap() ?????
Sorry to disappoint you there, but you can't.
And could you give me an example where we could use phy_to_virt().
Not really, I can't think of any correct use of phys_to_virt on powerpc. Arnd <><