RealView
DebuggerInterleaving is controlled with a workspace setting, which is set on (True) by default. If you cannot see interleaved source when debugging, you can check the setting as follows:
1. Select
Workspace
Workspace Options…
from the Code window File
menu. The Workspace Options window
is displayed.
2. Expand the DEBUGGER group, and click on Disassembler:

3. Right-click on Asm source in the right pane:

A context menu is displayed
4. Select True to turn interleaving on, or False to turn it off.
If you want to change the interleaving
behavior globally, make the changes in the Options
window.