From: Anton Vorontsov <anton.vorontsov@linaro.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Jason Wessel <jason.wessel@windriver.com>,
John Stultz <john.stultz@linaro.org>,
linux-kernel@vger.kernel.org, linaro-kernel@lists.linaro.org,
patches@linaro.org, kernel-team@android.com,
kgdb-bugreport@lists.sourceforge.net
Subject: [PATCH 3/4] ARM: VIC: Add a couple of low-level FIQ management helpers
Date: Thu, 22 Nov 2012 16:31:38 -0800 [thread overview]
Message-ID: <1353630699-2866-3-git-send-email-anton.vorontsov@linaro.org> (raw)
In-Reply-To: <20121123002957.GA31679@lizard.mcd25758.sjc.wayport.net>
Just a couple of calls to manage VIC FIQ routing. We'll use them for
KGDB FIQ support on ARM Versatile machines.
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
---
arch/arm/common/vic.c | 28 ++++++++++++++++++++++++++++
arch/arm/include/asm/hardware/vic.h | 2 ++
2 files changed, 30 insertions(+)
diff --git a/arch/arm/common/vic.c b/arch/arm/common/vic.c
index e0d5388..df2fc82 100644
--- a/arch/arm/common/vic.c
+++ b/arch/arm/common/vic.c
@@ -66,6 +66,34 @@ static struct vic_device vic_devices[CONFIG_ARM_VIC_NR];
static int vic_id;
+static void __iomem *vic_base(struct irq_data *d)
+{
+ return (void __iomem *)irq_data_get_irq_chip_data(d);
+}
+
+void vic_fiq_select(unsigned int irq, bool on)
+{
+ void __iomem *base = vic_base(&irq_to_desc(irq)->irq_data);
+ void __iomem *sel = base + VIC_INT_SELECT;
+ u32 msk = 1 << irq;
+ u32 val;
+
+ pr_debug("rerouting VIC vector %d to %s\n", irq, on ? "FIQ" : "IRQ");
+
+ val = readl(sel);
+ val &= ~msk;
+ if (on)
+ val |= msk;
+ writel(val, sel);
+}
+
+bool vic_is_fiq_rised(unsigned int irq)
+{
+ void __iomem *base = vic_base(&irq_to_desc(irq)->irq_data);
+
+ return readl(base + VIC_FIQ_STATUS) & (1 << irq);
+}
+
/**
* vic_init2 - common initialisation code
* @base: Base of the VIC.
diff --git a/arch/arm/include/asm/hardware/vic.h b/arch/arm/include/asm/hardware/vic.h
index e14af1a..2728975 100644
--- a/arch/arm/include/asm/hardware/vic.h
+++ b/arch/arm/include/asm/hardware/vic.h
@@ -52,6 +52,8 @@ void __vic_init(void __iomem *base, unsigned int irq_start, u32 vic_sources,
void vic_init(void __iomem *base, unsigned int irq_start, u32 vic_sources, u32 resume_sources);
int vic_of_init(struct device_node *node, struct device_node *parent);
void vic_handle_irq(struct pt_regs *regs);
+void vic_fiq_select(unsigned int irq, bool on);
+bool vic_is_fiq_rised(unsigned int irq);
#endif /* __ASSEMBLY__ */
#endif
--
1.8.0
next prev parent reply other threads:[~2012-11-23 0:35 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-23 0:29 [PATCH resend 0/4] ARM: KDB FIQ debugger Anton Vorontsov
2012-11-23 0:31 ` [PATCH 1/4] ARM: Move some macros from entry-armv to entry-header Anton Vorontsov
2012-11-23 0:31 ` [PATCH 2/4] ARM: Add KGDB/KDB FIQ debugger generic code Anton Vorontsov
2012-11-23 0:31 ` Anton Vorontsov [this message]
2012-11-23 0:31 ` [PATCH 4/4] ARM: versatile: Make able to use UART ports for KGDB FIQ debugger Anton Vorontsov
2012-11-23 0:42 ` [PATCH 1/4] ARM: Move some macros from entry-armv to entry-header Anton Vorontsov
2012-11-23 0:42 ` [PATCH 2/4] ARM: Add KGDB/KDB FIQ debugger generic code Anton Vorontsov
2012-11-23 0:42 ` [PATCH 3/4] ARM: VIC: Add a couple of low-level FIQ management helpers Anton Vorontsov
2012-11-23 0:42 ` [PATCH 4/4] ARM: versatile: Make able to use UART ports for KGDB FIQ debugger Anton Vorontsov
2012-12-06 15:17 ` [PATCH resend 0/4] ARM: KDB " Anton Vorontsov
2012-12-06 15:38 ` Anton Vorontsov
-- strict thread matches above, loose matches on Subject: below --
2012-10-16 0:37 [PATCH v10 " Anton Vorontsov
2012-10-16 0:39 ` [PATCH 3/4] ARM: VIC: Add a couple of low-level FIQ management helpers Anton Vorontsov
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