TRCBBCTLR, Branch Broadcast Control Register
The TRCBBCTLR controls how branch broadcasting behaves, and allows branch broadcasting to be enabled for certain memory regions.
Bit field descriptions
Figure D8-5 TRCBBCTLR bit assignments
- RES0, [31:9]
-
res0 Reserved. - 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 pairn
. 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.
Bit fields and details not provided in this description are architecturally defined. See the Arm® Architecture Reference Manual Armv8, for Armv8-A architecture profile.
The TRCBBCTLR can be accessed through the external debug interface, offset
.0x03C