mirror of
https://github.com/taigrr/gopher-os
synced 2025-01-18 04:43:13 -08:00
8dfc5d4e92
By setting up pwd as a Go workspace, we can trim import paths from something like "github.com/achilleasa/gopher-os/kernel" to just "kernel". These changes make forking easier and also allows us to move the code to a different git hosting provider without having to rewrite the imports.
20 lines
608 B
Go
20 lines
608 B
Go
package vmm
|
|
|
|
import "gopheros/kernel"
|
|
|
|
// Translate returns the physical address that corresponds to the supplied
|
|
// virtual address or ErrInvalidMapping if the virtual address does not
|
|
// correspond to a mapped physical address.
|
|
func Translate(virtAddr uintptr) (uintptr, *kernel.Error) {
|
|
pte, err := pteForAddress(virtAddr)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
// Calculate the physical address by taking the physical frame address and
|
|
// appending the offset from the virtual address
|
|
physAddr := pte.Frame().Address() + (virtAddr & ((1 << pageLevelShifts[pageLevels-1]) - 1))
|
|
|
|
return physAddr, nil
|
|
}
|