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 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.

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.