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

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Message-ID: <480D2E27.1000309@avtrex.com>
Date:	Mon, 21 Apr 2008 17:15:35 -0700
From:	David Daney <ddaney@...rex.com>
To:	linux-mips@...ux-mips.org
Cc:	linux-kernel@...r.kernel.org
Subject: [Patch 3/6] Probe watch registers and report configuration.

This portion of the patch add probing for the watch registers.  The probing
code is in watch.c, here we add a call to that code.

Also /proc/cpu info is modified to print out the watch register information.

Signed-off-by: David Daney <ddaney@...rex.com>
---
 arch/mips/kernel/cpu-probe.c |    3 +++
 arch/mips/kernel/proc.c      |   10 ++++++++++
 2 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index 89c3304..c3308d3 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -678,6 +678,9 @@ static void __cpuinit decode_configs(struct cpuinfo_mips *c)
 static inline void cpu_probe_mips(struct cpuinfo_mips *c)
 {
 	decode_configs(c);
+#if defined(CONFIG_HARDWARE_WATCHPOINTS)
+	mips_probe_watch_registers(c);
+#endif
 	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..e2f716c 100644
--- a/arch/mips/kernel/proc.c
+++ b/arch/mips/kernel/proc.c
@@ -50,8 +50,18 @@ 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");
+#ifdef CONFIG_HARDWARE_WATCHPOINTS
+	seq_printf(m, "hardware watchpoint\t: %s",
+		   cpu_has_watch ? "yes" : "no\n");
+	if (cpu_has_watch)
+		seq_printf(m, ", count: %d, address mask: 0x%04x, irw mask 0x%02x\n",
+			   cpu_data[n].watch_reg_count,
+			   cpu_data[n].watch_reg_mask,
+			   cpu_data[n].watch_reg_irw);
+#else
 	seq_printf(m, "hardware watchpoint\t: %s\n",
 	              cpu_has_watch ? "yes" : "no");
+#endif
 	seq_printf(m, "ASEs implemented\t:%s%s%s%s%s%s\n",
 		      cpu_has_mips16 ? " mips16" : "",
 		      cpu_has_mdmx ? " mdmx" : "",
-- 
1.5.5

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