target-arm: Implement setting of watchpoints

Implement support for setting QEMU watchpoints based on the
values the guest writes to the ARM architected watchpoint
registers. (We do not yet report the firing of the watchpoints
to the guest, so they will just be ignored.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 10 insertions, 0 deletions

diff --git a/target-arm/internals.h b/target-arm/internals.h
index 53c2e3c..22f382c 100644
--- a/target-arm/internals.h
+++ b/target-arm/internals.h
@@ -296,4 +296,14 @@ static inline uint32_t syn_swstep(int same_el, int isv, int ex)
         | (isv << 24) | (ex << 6) | 0x22;
 }
 
+/* Update a QEMU watchpoint based on the information the guest has set in the
+ * DBGWCR<n>_EL1 and DBGWVR<n>_EL1 registers.
+ */
+void hw_watchpoint_update(ARMCPU *cpu, int n);
+/* Update the QEMU watchpoints for every guest watchpoint. This does a
+ * complete delete-and-reinstate of the QEMU watchpoint list and so is
+ * suitable for use after migration or on reset.
+ */
+void hw_watchpoint_update_all(ARMCPU *cpu);
+
 #endif