MIPS: Probe watch registers and report configuration.

Probe for watch register characteristics, and report them in /proc/cpuinfo.

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

2 files changed, 13 insertions, 2 deletions

diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index e621fda8ab37..0cf15457ecac 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -21,6 +21,7 @@
 #include <asm/fpu.h>
 #include <asm/mipsregs.h>
 #include <asm/system.h>
+#include <asm/watch.h>
 
 /*
  * Not all of the MIPS CPUs have the "wait" instruction available. Moreover,
@@ -677,6 +678,7 @@ static inline void spram_config(void) {}
 static inline void cpu_probe_mips(struct cpuinfo_mips *c)
 {
         decode_configs(c);
+        mips_probe_watch_registers(c);
         switch (c->processor_id & 0xff00) {
         case PRID_IMP_4KC:
                 c->cputype = CPU_4KC;
diff --git a/arch/mips/kernel/proc.c b/arch/mips/kernel/proc.c
index 36f065398243..75bb1300dd7a 100644
--- a/arch/mips/kernel/proc.c
+++ b/arch/mips/kernel/proc.c
@@ -23,6 +23,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
         unsigned int version = cpu_data[n].processor_id;
         unsigned int fp_vers = cpu_data[n].fpu_id;
         char fmt [64];
+        int i;
 
 #ifdef CONFIG_SMP
         if (!cpu_isset(n, cpu_online_map))
@@ -50,8 +51,16 @@ static int show_cpuinfo(struct seq_file *m, void *v)
         seq_printf(m, "tlb_entries\t\t: %d\n", cpu_data[n].tlbsize);
         seq_printf(m, "extra interrupt vector\t: %s\n",
                       cpu_has_divec ? "yes" : "no");
-        seq_printf(m, "hardware watchpoint\t: %s\n",
-                      cpu_has_watch ? "yes" : "no");
+        seq_printf(m, "hardware watchpoint\t: %s",
+                   cpu_has_watch ? "yes, " : "no\n");
+        if (cpu_has_watch) {
+                seq_printf(m, "count: %d, address/irw mask: [",
+                           cpu_data[n].watch_reg_count);
+                for (i = 0; i < cpu_data[n].watch_reg_count; i++)
+                        seq_printf(m, "%s0x%04x", i ? ", " : "" ,
+                                   cpu_data[n].watch_reg_masks[i]);
+                seq_printf(m, "]\n");
+        }
         seq_printf(m, "ASEs implemented\t:%s%s%s%s%s%s\n",
                       cpu_has_mips16 ? " mips16" : "",
                       cpu_has_mdmx ? " mdmx" : "",