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Breakpoints and watchpoints

A breakpoint consists of a breakpoint control register and a breakpoint value register. These two registers are referred to as a Breakpoint Register Pair (BRP).

Four of the breakpoints (BRP 0-3) match only to virtual address and the other two (BRP 4 and 5) match against either virtual address or context ID, or VMID. All the watchpoints can be linked to two breakpoints (BRP 4 and 5) to enable a memory request to be trapped in a given process context.

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