How the mapping of virtual address into the physical address works?
The run time mapping between Virtual address and Physical Address is done by a hardware device known as MMU. In memory management, the Operating System will handle the processes and move the processes between disk and memory for execution . It keeps track of available and used memory.
Does CPU use virtual address?
The operating system manages virtual address spaces and the assignment of real memory to virtual memory. Address translation hardware in the CPU, often referred to as a memory management unit (MMU), automatically translates virtual addresses to physical addresses.
How does the CPU know which virtual address?
– Unix & Linux Stack Exchange How does the CPU knows which physical address is mapped to which virtual address?
How are physical address and virtual address related?
The physical address is where the actual data is stored, and the logical address generated by CPU is how the system will see the addresses. Physical memory (RAM) is divided into pages contiguous sequences of memory typically in the 4KB-16KB range. Physical addresses are provided by the hardware.
What happens when a logical address is mapped to a physical address?
When a logical address is mapped to its corresponding physical address, it becomes a joint a memory management unit between the CPU and the bus that carries the memory since the tasks performed are similar when it gets to the address translation layer and the CPU.
How is CPU physical address space mapped to physical DRAM?
You answered one of them: the physical address space represents more than just RAM/memory, there are also PCIe devices, ROM (where BIOS is located), etc, and thus there are memory holes. To inspect what does the physical address correspond to in the system, in Linux take a look at /proc/iomem, as it has the mappings.