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TRCIDR9, ID Register 9

The TRCIDR9 characteristics are:

Purpose

Returns the tracing capabilities of the trace unit.

Configuration

External register TRCIDR9 bits [31:0] are architecturally mapped to AArch64 System register TRCIDR9[31:0] .

This register is present only when ETE is implemented. Otherwise, direct accesses to TRCIDR9 are RES0.

Attributes

TRCIDR9 is a 32-bit register.

Field descriptions

The TRCIDR9 bit assignments are:

313029282726252423222120191817161514131211109876543210
NUMP0KEY

NUMP0KEY, bits [31:0]

When TRCIDR0.TRCDATA != 0b00:

Indicates the number of P0 right-hand keys. Data tracing is not implemented in ETE and this field is reserved for other trace architectures. Allocated in other trace architectures.


Otherwise:

Reserved, RES0.

Accessing the TRCIDR9

TRCIDR9 can be accessed through the external debug interface:

ComponentOffset
ETE0x184

This interface is accessible as follows:

  • When OSLockStatus() or !IsTraceCorePowered() accesses to this register generate an error response.
  • Otherwise accesses to this register are RO.


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