How do I set a breakpoint in ROM?

If code is in ROM, you cannot set a software breakpoint on an instruction. You must use hardware breakpoints, if your target supports them.

To check the break capability of your target, select the Show Break Capabilities of HW… option from the Complex Breakpoints submenu of the Code window Debug menu.

To set a simple breakpoint on an instruction, double-click on the line in the margin of the source file. If there is a hardware break available, RealView sets it automatically and you can see it in the File Editor pane and Break/Tracepoints pane in the same way as a software breakpoint.

RealView Debugger menu items related to hardware breakpoints are grayed out if your target cannot support them, or if no more are available.

See Set Address/Data Breakpoint dialog.