3.5.61. Lock Access Register, ETMLAR, ETMv3.2 and later

The ETMLAR characteristics are:

Purpose

Locks and unlocks access to all other ETM registers.

Usage constraints

Writes to this register from an interface that ignores the lock registers are ignored.

In ETMv3.5 coprocessor accesses to ETMLAR are unpredictable.

Configurations

This register is only available in ETMv3.2 or later.

Attributes

See the register summary in Table 3.3 and Reset behavior.

Figure 3.54 shows the ETMLAR bit assignments.

Figure 3.54. ETMLAR bit assignments

To view this graphic, your browser must support the SVG format. Either install a browser with native support, or install an appropriate plugin such as Adobe SVG Viewer.


Table 3.69 shows the ETMLAR bit assignments.

Table 3.69. ETMLAR bit assignments

Bits

Version [a]

Description

[31:0]

v3.2

Write 0xC5ACCE55 to this field to unlock the ETM.

Write any other value to this field to lock the ETM.

[a] The first ETM architecture version that defines the field.


Copyright © 1999-2002, 2004-2009, 2011 ARM Limited. All rights reserved.ARM IHI 0014Q
Non-ConfidentialID101211