Can I load data from RAM by using pointer to memory with physical addressing(not to virtual) from my driver (Linux-kernel) without allocating pages (PDEs/PTEs) in virtual addressing?
Can I load data from RAM by using pointer to memory with physical addressing?
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Yes! "/dev/mem" is an image of physical memory, and you can even access this from user space.
For example, to access physical address
0x7000000, the code below summarizes the steps: