linux-kernel - [Patch 3/6] MIPS: Probe watch registers and report configuration.

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Message-ID: <48C8B333.4000003@avtrex.com>
Date:	Wed, 10 Sep 2008 22:57:07 -0700
From:	David Daney <ddaney@...rex.com>
To:	linux-mips@...ux-mips.org
Cc:	linux-kernel@...r.kernel.org
Subject: [Patch 3/6] MIPS: Probe watch registers and report configuration.

Probe watch registers and report configuration.

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

Signed-off-by: David Daney <ddaney@...rex.com>
---
 arch/mips/kernel/cpu-probe.c |    2 ++
 arch/mips/kernel/proc.c      |    9 +++++++--
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index 335a6ae..d0d07b8 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,
@@ -685,6 +686,7 @@ 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 36f0653..9d60679 100644
--- a/arch/mips/kernel/proc.c
+++ b/arch/mips/kernel/proc.c
@@ -50,8 +50,13 @@ 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: 0x%04x\n",
+			   cpu_data[n].watch_reg_count,
+			   cpu_data[n].watch_reg_masks[0]);
 	seq_printf(m, "ASEs implemented\t:%s%s%s%s%s%s\n",
 		      cpu_has_mips16 ? " mips16" : "",
 		      cpu_has_mdmx ? " mdmx" : "",
-- 
1.5.5.1

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