［轉(zhuǎn)］kernel thread & mmap() 相關(guān)技術(shù)

haox2653

http://www.scs.ch/~frey/linux/
Linux Device Drivers Examples
PurposeThe examples below show some code and explanations to solve
various problems with Linux device drivers that I run into while writing drivers
for our development projects.
Mapping Memory to user space
This example
shows how
to map vmalloc() allocated memory from a device driver to user space.
It
contains a function virt_to_kseg() that calculates the address in the 1:1
virtual to physical mapping kernel virtual memory view out of a general kernel
virtual memory address. This function can also be useful e.g. to do DMA into
such an address.
Starting and Stopping Kernel Threads
This example
shows
how to start and stop kernel threads in a loadable module.
               
               
               

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