Misbah khan ha scritto:
This i am not very sure with :-
Can we allocate 9MB using vmalloc and assure it to be low memory and not
highmem ?
Why do you need only low memory? And why do you need to allocate memory?
If I understood correctly you need only to "ioremap" a chunk of memory.
can we ioremap 9 MB SDRAM to kernel virtual ?
Yep.
can we use vmalloc and do mmap to that allocated memory ,if the pages are
not continues then is it going to concern mapping to user space ?
The "contiguous" problem is related only to DMA operations.
---Misbah <><
Arnd Bergmann wrote:
On Thursday 17 July 2008, Misbah khan wrote:
I need to allocate 9 MB of memory in to the kernel space which i need to
mmap for the application to access.
I need to know what could be the best possible way of doing the same.
If you don't need the memory to be physically contiguous, you can use
vmalloc to get the memory, but then you need to use remap_vmalloc_range
for mapping the memory into a user address space.
Arnd <><
_______________________________________________
Linuxppc-embedded mailing list
Linuxppc-embedded@ozlabs.org
https://ozlabs.org/mailman/listinfo/linuxppc-embedded
--
Marco Stornelli
Embedded Software Engineer
CoRiTeL - Consorzio di Ricerca sulle Telecomunicazioni
http://www.coritel.it
[EMAIL PROTECTED]
+39 06 72582838
_______________________________________________
Linuxppc-embedded mailing list
Linuxppc-embedded@ozlabs.org
https://ozlabs.org/mailman/listinfo/linuxppc-embedded
