powerpc: BookE hardware watchpoint support

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This patch implements support for HW based watchpoint via the
DBSR_DAC (Data Address Compare) facility of the BookE processors.

It does so by interfacing with the existing DABR breakpoint code
and adding the necessary bits and pieces for the new bits to
be properly set or cleared

Signed-off-by: Luis Machado <luisgpm@br.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

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Luis Machado 2008-07-24 02:10:41 +10:00 • committed by Benjamin Herrenschmidt

parent 00bf6e9061

commit d6a61bfc06

7 changed files with 138 additions and 35 deletions

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include/asm-powerpc/system.h

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