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10.5.3. Watchpoint Value Registers

The Watchpoint Value Registers (WVRs) are registers 96-99, at offsets 0x180-0x18C. Each WVR is associated with a Watchpoint Control Register (WCR), for example:

  • WVR0 with WCR0

  • WVR1 with WCR1.

This pattern continues up to WVR3 with WCR3.

Table 10.6 shows the WVRs and corresponding WCRs.

Table 10.6. WVRs and corresponding WCRs
Watchpoint Value RegistersWatchpoint Control Registers
Register numberOffsetNameRegister numberOffsetName
960x180WVR0112

0x1C0

WCR0
970x184WVR11130x1C4WCR1
980x188WVR21140x1C8WCR2
990x18CWVR31150x1DCWCR3

A pair of watchpoint registers, WVRn and WCRn, is called a Watchpoint Register Pair (WRPn).

The watchpoint value contained in the WVR always corresponds to a Data Virtual Address (DVA) and can be set either on:

  • a DVA

  • a DVA and context ID pair.

For a DVA and context ID pair, a WRP and a BRPs with context ID comparison capability must be linked. A debug event is generated when both the DVA and the context ID pair match simultaneously. Table 10.7 shows how the bit values correspond with the Watchpoint Value Registers functions.

Table 10.7. Watchpoint Value Registers bit functions
BitsNameDescription

[31:2]

-

Watchpoint address

[1:0]

-

RAZ on reads, SBZP on writes


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