C11.5 Branch Broadcast Control Register
The TRCBBCTLR characteristics are:
Purpose
Controls how branch broadcasting behaves, and enables branch broadcasting to be enabled for
certain memory regions.
Usage constraints
• Only accepts writes when the trace unit is disabled.
• Must be programmed if TRCCONFIGR.BB == 1.
Configurations
Available in all configurations.
Attributes
See C11.1 ETM register summary on page C11-733.
31 0
RES0
8 7
RANGE
9
MODE
Figure C11-4 TRCBBCTLR bit assignments
[31:9]
Reserved, RES0.
MODE, [8]
Mode bit:
0 Exclude mode. Branch broadcasting is not enabled in the address range that RANGE defines.
If RANGE==0 then branch broadcasting is enabled for the entire memory map.
1 Include mode. Branch broadcasting is enabled in the address range that RANGE defines.
If RANGE==0 then the behavior of the trace unit is constrained UNPREDICTABLE. That is, the
trace unit might or might not consider any instructions to be in a branch broadcast region.
RANGE, [7:0]
Address range field.
Selects which address range comparator pairs are in use with branch broadcasting. Each bit
represents an address range comparator pair, so bit[n] controls the selection of address range
comparator pair n. If bit[n] is:
0 The address range that address range comparator pair n defines, is not selected.
1 The address range that address range comparator pair n defines, is selected.
The TRCBBCTLR can be accessed through the external debug interface, offset 0x03C.
C11 ETM registers
C11.5 Branch Broadcast Control Register
100236_0100_00_en Copyright © 2015–2017, 2019 Arm Limited or its affiliates. All rights
reserved.
C11-740
Non-Confidential
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