How does x86 northbridge/memory controller routes addresses for memory mapped io?Linux I/O shared memory...

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How does x86 northbridge/memory controller routes addresses for memory mapped io?


Linux I/O shared memory accessHow to get a procesess's actual memory usage (including data in swap)what does it mean 'fork()' will copy address space of original processHow to specify memory region for ramdriveHow does the CPU knows which physical address is mapped to which virtual address?Allocating secure memoryLinux Kernel memory management quoteIs memory mapped I/O only used internally by OS, not exposed to and used by programmers on top of Linux?






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My current understanding is that northbridge/memory controller routes address accesses, based on some programmable rule, such that accesses to memory mapped region will be re-directed to southbridge and relayed to devices, while RAM will not even notice these memory accesses. Is this correct, and if so, how does it do it?










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    My current understanding is that northbridge/memory controller routes address accesses, based on some programmable rule, such that accesses to memory mapped region will be re-directed to southbridge and relayed to devices, while RAM will not even notice these memory accesses. Is this correct, and if so, how does it do it?










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      My current understanding is that northbridge/memory controller routes address accesses, based on some programmable rule, such that accesses to memory mapped region will be re-directed to southbridge and relayed to devices, while RAM will not even notice these memory accesses. Is this correct, and if so, how does it do it?










      share|improve this question
















      My current understanding is that northbridge/memory controller routes address accesses, based on some programmable rule, such that accesses to memory mapped region will be re-directed to southbridge and relayed to devices, while RAM will not even notice these memory accesses. Is this correct, and if so, how does it do it?







      linux-kernel memory io x86






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