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| author | Will Deacon <will.deacon@arm.com> | 2011-08-02 16:16:57 +0100 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2011-08-31 10:42:48 +0100 |
| commit | 6f26aa05c9edffff6a4c2cd71774bc659a5cceec (patch) | |
| tree | a2db63a03389e2153004347ddd93805486d1076b /arch/arm/include/asm/hw_breakpoint.h | |
| parent | c512de955f0982aafa49d3f00d5643052a6790e5 (diff) | |
| download | op-kernel-dev-6f26aa05c9edffff6a4c2cd71774bc659a5cceec.zip op-kernel-dev-6f26aa05c9edffff6a4c2cd71774bc659a5cceec.tar.gz | |
ARM: hw_breakpoint: add support for multiple watchpoints
ARM debug architecture 7.1 mandates that the DFAR is updated on a
watchpoint debug exception to contain the faulting virtual address
of the memory access. This allows us to determine which watchpoints
have fired and therefore report useful information to userspace.
This patch adds support for using the DFAR in the watchpoint handler,
which allows us to support multiple watchpoints on CPUs implementing
the new debug architecture.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm/include/asm/hw_breakpoint.h')
| -rw-r--r-- | arch/arm/include/asm/hw_breakpoint.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/include/asm/hw_breakpoint.h b/arch/arm/include/asm/hw_breakpoint.h index 0ac141a..c190bc9 100644 --- a/arch/arm/include/asm/hw_breakpoint.h +++ b/arch/arm/include/asm/hw_breakpoint.h @@ -58,6 +58,7 @@ static inline void decode_ctrl_reg(u32 reg, /* Watchpoints */ #define ARM_BREAKPOINT_LOAD 1 #define ARM_BREAKPOINT_STORE 2 +#define ARM_FSR_ACCESS_MASK (1 << 11) /* Privilege Levels */ #define ARM_BREAKPOINT_PRIV 1 |
