target-arm: Implement setting guest breakpoints

This patch adds support for setting guest breakpoints
based on values the guest writes to the DBGBVR and DBGBCR
registers. (It doesn't include the code to handle when
these breakpoints fire, so has no guest-visible effect.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1410523465-13400-2-git-send-email-peter.maydell@linaro.org
diff --git a/target-arm/cpu.h b/target-arm/cpu.h
index d1e1ccb..fa6ae0a 100644
--- a/target-arm/cpu.h
+++ b/target-arm/cpu.h
@@ -323,6 +323,7 @@
     int eabi;
 #endif
 
+    struct CPUBreakpoint *cpu_breakpoint[16];
     struct CPUWatchpoint *cpu_watchpoint[16];
 
     CPU_COMMON