Cortex™-A8 Technical Reference Manual 3.2.4. c0, TCM Type Register

3.2.4. c0, TCM Type Register

The processor does not implement Tightly Coupled Memory (TCM). The TCM Type Register specifies that the processor does not implement instruction and data TCMs.

The TCM Type Register is:

a read-only register that is Read-As-Zero
accessible in privileged modes only.

Table 3.8 shows the results of attempted access for each mode.

Table 3.8. Results of access to the TCM Type Register

Secure privileged		Nonsecure privileged		Secure User		Nonsecure User
Read	Write	Read	Write	Read	Write	Read	Write
Data	Undefined exception	Data	Undefined exception	Undefined exception	Undefined exception	Undefined exception	Undefined exception

To access the TCM Type Register, read CP15 with:

MRC p15, 0, <Rd>, c0, c0, 2; Read TCM Type Register

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