ARM Cortex R4F - Manual (Page 289)

Debug
ARM DDI 0363E Copyright © 2009 ARM Limited. All rights reserved. 11-20
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Figure 11-7 Vector Catch Register format
If one of the bits in this register is set and the instruction at the corresponding vector is
committed for execution, the processor either enters debug state or takes a debug exception.
Note
• Under this model, any prefetch from an exception vector can trigger a vector catch, not
only the ones because of exception entries. An explicit branch to an exception vector
might generate a vector catch debug event.
• If any of the bits are set when the processor is in Monitor debug-mode, then the processor
ignores the setting and does not generate a vector catch debug event. This prevents the
processor entering an unrecoverable state. The debugger must program these bits to zero
when Monitor debug-mode is selected and enabled to ensure forward-compatibility.
Table 11-13 shows how the bit values correspond with the Vector Catch Register functions.
31 8 7 6 5 4 3 2 1 0
Reserved
Reset
Reserved
SVC
Prefetch abort
Data abort
Reserved
IRQ
FIQ
Table 11-13 Vector Catch Register functions
Bits Field
Reset
value Normal
address High vectors
address
Function Access
[31:8] Reserved 0 - - Do not modify on writes. On reads,
the value returns zero. RAZ or
SBZP
[7] FIQ 0 0x0000001C 0xFFFF001C Vector catch enable. RW
[6] IRQ -
0x00000018
a
0xFFFF0018
a Vector catch enable. -
[5] Reserved 0 - - Do not modify on writes. On reads,
the value returns zero. RAZ or
SBZP
[4] Data Abort 0 0x00000010 0xFFFF0010 Vector catch enable. RW
[3] Prefetch Abort 0
0x0000000C 0xFFFF000C
Vector catch enable. RW
[2] SVC 0 0x00000008 0xFFFF0008 Vector catch enable. RW
[1] Reserved 0 0x00000004 0xFFFF0004 Vector catch enable, Undefined
instruction. RW
[0] Reset 0
0x00000000 0xFFFF0000
Vector catch enable. RW
a. If the VIC interface is enabled, the address is the last IRQ handler address supplied by the VIC, whether or not high vectors
are in use.