How is a virtual address converted to a physical address?

There are two ways to convert a virtual address to a physical address: by using the ! vtop extension, and by using the ! pte extension. For an overview of virtual address in Windows, see Virtual address spaces.

What does Ioremap return?

A successful call to ioremap() returns a kernel virtual address corresponding to start of the requested physical address range. This address is not normally meant to be dereferenced directly, though, for a number of (often architecture-specific) reasons.

How does a file manager convert logical address into physical address?

The logical address undergoes translation by the MMU or address translation unit in particular. The output of this process is the appropriate physical address or the location of code/data in RAM. If you know that during compile time, where process will reside in memory, then an absolute address is generated.

How does a virtual address work?

At its most basic level, a virtual address works like this: You choose an address that’s owned by a virtual address service. Mail sent to that address is received by the virtual address service. The virtual address service scans the mail and uploads it to a cloud-based service where you can see it.

How does virtual mailing address work?

How Virtual Mailbox Works

• Your virtual mailbox is a digital service that you access via any computer, tablet, or smartphone.
• Receive, forward, pick up, shred, or discard mail and packages.
• Your virtual mailbox address is a real street address with your own personal box number.

What is the use of Ioremap?

ioremap() function is used to map the physical addres of an I/O device to the kernel virtual address. Kernel creates a page table i.e mapping of virtual address to the physical address requested.

Why is Ioremap required?

Why do we convert logical address to physical address?

This is to allow the logical address space of a process to be non-contiguous, which makes the process to be allocated physical memory. Logical address space of a process can be non-contiguous; process is allocated physical memory.