Hi all:
Sorry for the newbie question. I’m
working on a kernel module which is meant to manage a chunk of physical memory.
My intent is to boot the kernel with ‘physmem=<somevalue>’ to limit the
physical memory available to the OS, and then use this kernel module to manage
the rest of physical memory to support some code that we are porting from
another OS.
One of the things the module needs
to do is map this reserved physical memory into the kernel virtual address
space so that
we can write data management structs etc. into it. The module will then
service ioctl's from user space, as well as calls from other kernel modules to
manipulate the memory.
My question is: is there an
established ddi to map physical memory into the kernel AS
for this sort of thing? The ddi for mapping into user space is well
documented,
but I need to be able to do the same in a kernel module.
Any pointers would be
appreciated.
thanks in
advance
Mark
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