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Embedded Trace Macrocell Interface
Port name
Direction
ETMIA[31:1]
Output
ETMFOLD
Output
ETMFLUSH
Output
ETMFINDBR
Output
ETMCANCEL
Output
16-4
Qualified by
-
ETMIVALID
-
ETMFLUSH
-
Copyright © 2005, 2006 ARM Limited. All rights reserved.
Table 16-1 ETM interface ports (continued)
Description
Instruction address. Indicates the current fetch address of the
opcode in execution, or of the last opcode executed. You can
determine the context by examining:
ETMIVALID
HALTED
SLEEPING
The ETM examines this net when ETMIVALID and
ETMIBRANCH are asserted. The DWT examines this net for
PC samples and bus watching.
Opcode fold. Indicates that an IT or NOP opcode has been
folded in this cycle. PC advances past the current (16-bit)
opcode and the IT/NOP instruction (16 bits). This affects the
ETMIA.
Flush marker of PC event. A PC modifying opcode has
executed or an interrupt push/pop has started. The ETM can use
this control to complete outstanding packets in preparation for
an ETMIBRANCH event.
Flush is indirect. Marks that the flush hint destination cannot be
deduced from the PC.
Current opcode in execute has been cancelled. Opcodes that are
interrupted restart or continue on return to this execution
context. These include:
LDR/STR
LDRD/STRD
LDM/STM
U/SMULL
MLA
U/SDIV
MSR
CPSID
ARM DDI 0337B
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