Cortex-A15 MPCore Technical Reference ManualRevision: r3p0
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10.4.10. Breakpoint Extended Value Registers

The DBGBXVR characteristics are:

Purpose

Holds a value for use in breakpoint matching, to support Context ID matching.

Usage constraints

Used in conjunction with a DBGBCR, see Breakpoint Control Registers, and Breakpoint Value Registers. Each DBGBXVR is associated with a DBGBCR and DBGBVR to form a Breakpoint Register Pair (BRP). DBGBXVRn is associated with DBGBCRn and DBGBVRn to form BRPn.

Configurations

The processor implements 2 BRPs that can be used for Context ID matching, and is specified by the DBGDIDR.CTX_CMPs field, see Debug ID Register.

Attributes

See the register summary in Table 10.1.

Figure 10.12 shows the DBGBXVR bit assignments.

Figure 10.12. DBGBXVR bit assignments

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Table 10.12 shows the DBGBXVR bit assignments.

Table 10.12. DBGBXVR bit assignments

BitsNameFunction
[31:8]-

UNK/SBZP.

[7:0]VMID

VMID value. Used to compare with the Virtual Machine ID (VMID) field, held in the Virtualization Translation Table Base Register (VTTBR). See the ARM Architecture Reference Manual for more information.


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