6.5.3. TFO packet headers

TFO packets are placed in the FIFO by a TFO cycle. The decompressor knows when a packet is placed in the FIFO by a TFO, so TFO packets have their own header byte, as Table 6.6 shows.

Table 6.6. TFO packet header encodings

ValueDescription
b0RR00000[a]

Normal TFO packet

b1RR00000a

LSM In Progress TFO packet

[a] RR represents the TFO reason code.


All other encodings are reserved. The TFO packet header encodings are completely independent of the encoding space used by trace data packets.

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