MIPS: Add HARDWARE_WATCHPOINTS definitions and support code.

This is the main support code for the patch.  Here we just add the
code, the following patches hook it up.

Signed-off-by: David Daney <ddaney@avtrex.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

 create mode 100644 arch/mips/include/asm/watch.h
 create mode 100644 arch/mips/kernel/watch.c

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/mips/include/asm/cpu-info.h b/arch/mips/include/asm/cpu-info.h
index 2de73dbb2e9e..744cd8fb107f 100644
--- a/arch/mips/include/asm/cpu-info.h
+++ b/arch/mips/include/asm/cpu-info.h
@@ -12,6 +12,8 @@
 #ifndef __ASM_CPU_INFO_H
 #define __ASM_CPU_INFO_H
 
+#include <linux/types.h>
+
 #include <asm/cache.h>
 
 /*
@@ -69,6 +71,10 @@ struct cpuinfo_mips {
         int                     tc_id;   /* Thread Context number */
 #endif
         void                    *data;  /* Additional data */
+        unsigned int            watch_reg_count;   /* Number that exist */
+        unsigned int            watch_reg_use_cnt; /* Usable by ptrace */
+#define NUM_WATCH_REGS 4
+        u16                     watch_reg_masks[NUM_WATCH_REGS];
 } __attribute__((aligned(SMP_CACHE_BYTES)));
 
 extern struct cpuinfo_mips cpu_data[];