ARM r1p3, R4, R4F

Debug

ID013010 Non-Confidential, Unrestricted Access

To use the Debug ID Register, read CP14 c0 with:

MRC p14, 0, <Rd>, c0, c0, 0 ; Read Debug ID Register

11.4.3 CP14 c0, Debug ROM Address Register

The Debug ROM Address Register is a read-only register that returns a 32-bit Debug ROM

Address Register value. This is the address that indicates where in memory a debug monitor can

locate the debug bus ROM specified by the CoreSight™ multiprocessor trace and debug

architecture. This ROM holds information about all the components in the debug bus. You can

configure the address read in this register during integration using the

DBGROMADDR[31:12] and DBGROMADDRV inputs. DBGROMADDRV must be tied

off to 1 if DBGROMADDR[31:12] is tied off to a valid value.

The Debug ROM Address Register is:

• in CP14 c0, sub-register c1

• a 32 bit read-only register

• accessible in User and Privileged modes.

Figure 11-3 shows the bit arrangement of the Debug ROM address register.

Figure 11-3 Debug ROM Address Register format

Table11-8 shows how the bit values correspond with the Debug ROM Address Register

functions.

To use the Debug ROM Address Register, read CP14 c0 with:

MRC p14, 0, <Rd>, c1, c0, 0 ; Read Debug ROM Address Register

11.4.4 CP14 c0, Debug Self Address Offset Register

The Debug Self Address Offset Register is a read-only register that returns a 32-bit offset value

from the Debug ROM Address Register to the address of the processor debug registers. You can

configure the address read in this register during integration using the

DBGSELFADDR[31:12] and DBGSELFADDRV inputs. DBGSELFADDRV must be tied

off to 1 if DBGSELFADDR[31:12] is tied off to a valid value.

Debug bus ROM physical address Reserved

Valid bits

31 1211 2 1 0

Table11-8 Debug ROM Address Register functions

Bits Field Function

[31:12] Debug bus

ROM address.

Indicates bits [31:12] of the debug bus ROM address.

[11: 2] Reserved SBZ.

[1:0] Valid bits Indicates that the ROM address is valid.

Reads b11 if DBGROMADDRV is set to 1, otherwise reads b00. DBGROMADDRV must

be set to 1 if DBGROMADDR[31:12] is set to a valid value.