Cortex-A8 R2P2.pdf - ARM Information Center

DebugTable 12-22 shows how the bit values correspond with the Breakpoint Value Registersfunctions.Table 12-22 Breakpoint Value Registers bit functionsBitsFieldDescription[31:0] - Breakpoint value. The reset value is 0.Note• Only BRP4 and BRP5 support context ID comparison.• BVR0[1:0], BVR1[1:0], BVR2[1:0], and BVR3[1:0] are Should-Be-Zero orPreserved on writes and Read-As-Zero on reads because these registers do notsupport context ID comparisons.• The context ID value for a BVR to match with is given by the contents of theCP15 Context ID Register. See Chapter 3 System Control Coprocessor forinformation on the Context ID Register.12.4.14 Breakpoint Control RegistersThe BCR is a read/write register that contains the necessary control bits for setting:• breakpoints• linked breakpoints.Figure 12-12 shows the bit arrangement of the BCRs.31 29 28 24 23 22 20 19 16 15 14 13 9 8 5 4 3 2 1 0ByteBreakpointM Linked BRP Reserved address S Baddress maskselectReservedReservedSecure state access controlReservedFigure 12-12 Breakpoint Control Registers format12-38 Copyright © 2006-2008 ARM Limited. All rights reserved. ARM DDI 0344E