3.8.4 TCU_ERRGEN

This is the TCU Error Generation Register. Use this register to generate tag parity errors, for example when testing error-handling software.

The TCU_ERRGEN characteristics are:

Usage constraints

When TCU_SCR.NS_RAS = 0, Non-secure accesses to this register are RAZ/WI.

Configurations

This register exists in all TCU configurations.

Attributes
Offset

0x08EC0

Type

RW

Reset

0x00000000

Width

64

The following figure shows the bit assignments.

Figure 3-11 TCU_ERRGEN register 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.


The following table shows the bit assignments.

Table 3-25 TCU_ERRGEN register bit assignments

Bits Name Function
[63:4] - Reserved.
[3] TCC

Configuration cache tag parity error.

0No tag parity error is written to the configuration cache.
1Entries that are written to the configuration cache include a tag parity error. A fault occurs when the entry is used.
[2] DCC

Configuration cache data parity error.

0No data parity error is written to the configuration cache.
1Entries that are written to the configuration cache include a data parity error. A fault occurs when the entry is used.

Note:

Tag parity errors mask data parity errors. When testing data parity error functionality, ensure that software does not set this bit and the TCC bit at the same time.
[1] TWC

Walk cache tag parity error.

0No tag parity error is written to the walk cache.
1Entries that are written to the walk cache include a tag parity error. A fault occurs when the entry is used.
[0] DWC

Walk cache data parity error.

0No data parity error is written to the walk cache.
1Entries that are written to the walk cache include a data parity error. A fault occurs when the entry is used.

Note:

Tag parity errors mask data parity errors. When testing data parity error functionality, ensure that software does not set this bit and the TWC bit at the same time.
Non-ConfidentialPDF file icon PDF version100310_0100_00_en
Copyright © 2016–2018 Arm Limited or its affiliates. All rights reserved.