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

 

 

 

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With regards,
Sandeep Kumar Anantapalli,