From: coolsandyforyou@gmail.com (sandeep kumar)
To: kernelnewbies@lists.kernelnewbies.org
Subject: Clarification on memory mapping
Date: Wed, 1 Jun 2011 12:04:28 +0530 [thread overview]
Message-ID: <BANLkTin0Ge_b7S8kedbMx4NVcwQdm92etQ@mail.gmail.com> (raw)
Hi,
I am new to kernel programming. Last few days i have been reading about
memory management, memory mapping etc.,
But i could not put the things together.
Here i need clarifications regarding the few things whether wat i understood
is right or not.
1) Mapping means bringing a device memory which is not in the address space
of kernel/user to its address space.
ioremap() :
2) ioremap does mapping of a particular i/o device to kernel logical memory
address.
mmap()
3) mmap does the mapping of a device memory to user space virtual address.
kmap()
4) gets a kernel virtual address of an allocated high memory page.
5) And finally memory mapping does a manipulation of a PTE.
Tell if i have interpreted anything wrong and please correct me.
Thank you
--
With regards,
Sandeep Kumar Anantapalli,
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next reply other threads:[~2011-06-01 6:34 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-01 6:34 sandeep kumar [this message]
2011-06-01 16:00 ` Clarification on memory mapping Mulyadi Santosa
2011-06-01 17:38 ` Prashant Shah
2011-06-01 23:47 ` Dave Hylands
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