linux-kernel - [PATCH 1/6] set up MSP VPE1 timer.

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Message-Id: <1295943561-20000-1-git-send-email-anoop.pa@gmail.com>
Date:	Tue, 25 Jan 2011 13:49:21 +0530
From:	"Anoop P.A" <anoop.pa@...il.com>
To:	ralf@...ux-mips.org, linux-mips@...ux-mips.org,
	linux-kernel@...r.kernel.org
Cc:	Anoop P A <anoop.pa@...il.com>
Subject: [PATCH 1/6] set up MSP VPE1 timer.

From: Anoop P A <anoop.pa@...il.com>

VPE1 timer will be required for MIPS_MT modes ( VSMP / SMTC ).
This patch will setup will setup VPE1 timer irq.This has been
tested with both SMTC and VSMP

Signed-off-by: Anoop P A <anoop.pa@...il.com>
---
 arch/mips/pmc-sierra/msp71xx/msp_time.c |   15 ++++++++++++++-
 1 files changed, 14 insertions(+), 1 deletions(-)

diff --git a/arch/mips/pmc-sierra/msp71xx/msp_time.c b/arch/mips/pmc-sierra/msp71xx/msp_time.c
index 01df84c..b6c2d33 100644
--- a/arch/mips/pmc-sierra/msp71xx/msp_time.c
+++ b/arch/mips/pmc-sierra/msp71xx/msp_time.c
@@ -36,6 +36,13 @@
 #include <msp_int.h>
 #include <msp_regs.h>
 
+#define get_current_vpe()   \
+	((read_c0_tcbind() >> TCBIND_CURVPE_SHIFT) & TCBIND_CURVPE)
+
+extern struct irqaction c0_compare_irqaction;
+static struct irqaction timer_vpe1;
+static int tim_installed;
+
 void __init plat_time_init(void)
 {
 	char    *endp, *s;
@@ -83,5 +90,11 @@ void __init plat_time_init(void)
 
 unsigned int __cpuinit get_c0_compare_int(void)
 {
-	return MSP_INT_VPE0_TIMER;
+	/* MIPS_MT modes may want timer for second VPE */
+	if ((get_current_vpe()) && !tim_installed) {
+		memcpy(&timer_vpe1, &c0_compare_irqaction, sizeof(timer_vpe1));
+		setup_irq(MSP_INT_VPE1_TIMER, &timer_vpe1);
+		tim_installed++;
+	}
+	return (get_current_vpe() ? MSP_INT_VPE1_TIMER : MSP_INT_VPE0_TIMER);
 }
-- 
1.7.0.4

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