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ebfb2f4)
Hi everyone (again),
Watchpoints on xscale are quirky, so I thought a little explanation in the
user's manual was warranted.
Comments gratefully received.
Last one, Øyvind :-)
Thanks,
Mike
Signed-off-by: Mike Dunn <mikedunn@newsguy.com>
debug handler are either (0x800 - 0x1fef800) or (0xfe000800 -
0xfffff800). The default value is 0xfe000800.
debug handler are either (0x800 - 0x1fef800) or (0xfe000800 -
0xfffff800). The default value is 0xfe000800.
+XScale has resources to support two hardware breakpoints and two
+watchpoints. However, the following restrictions on watchpoint
+functionality apply: (1) the value and mask arguments to the @code{wp}
+command are not supported, (2) the watchpoint length must be a
+power of two and not less than four, and can not be greater than the
+watchpoint address, and (3) a watchpoint with a length greater than
+four consumes all the watchpoint hardware resources. This means that
+at any one time, you can have enabled either two watchpoints with a
+length of four, or one watchpoint with a length greater than four.
These commands are available to XScale based CPUs,
which are implementations of the ARMv5TE architecture.
These commands are available to XScale based CPUs,
which are implementations of the ARMv5TE architecture.
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