From: Anton Vorontsov <anton.vorontsov@linaro.org>
To: Andrew Morton <akpm@linux-foundation.org>,
Russell King <linux@arm.linux.org.uk>,
Jason Wessel <jason.wessel@windriver.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Alan Cox <alan@linux.intel.com>
Cc: "Arve Hjønnevåg" <arve@android.com>,
"Colin Cross" <ccross@android.com>,
"Brian Swetland" <swetland@google.com>,
"John Stultz" <john.stultz@linaro.org>,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linaro-kernel@lists.linaro.org, patches@linaro.org,
kernel-team@android.com, kgdb-bugreport@lists.sourceforge.net,
linux-serial@vger.kernel.org
Subject: [PATCH 11/12] ARM: VIC: Add a couple of low-level FIQ management helpers
Date: Tue, 11 Sep 2012 02:35:05 -0700 [thread overview]
Message-ID: <1347356106-25368-11-git-send-email-anton.vorontsov@linaro.org> (raw)
In-Reply-To: <20120911093042.GA12471@lizard>
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
--
1.7.11.5
next prev parent reply other threads:[~2012-09-11 9:39 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-11 9:30 [PATCH v6 0/12] KGDB/KDB FIQ (NMI) debugger Anton Vorontsov
2012-09-11 9:34 ` [PATCH 01/12] kernel/debug: Mask KGDB NMI upon entry Anton Vorontsov
2012-09-11 9:34 ` [PATCH 02/12] kdb: Implement disable_nmi command Anton Vorontsov
2012-09-11 9:34 ` [PATCH 03/12] kdb: Turn KGDB_KDB=n stubs into static inlines Anton Vorontsov
2012-09-11 9:34 ` [PATCH 04/12] tty/serial/core: Introduce poll_init callback Anton Vorontsov
2012-09-11 9:34 ` [PATCH 05/12] tty/serial/amba-pl011: Implement " Anton Vorontsov
2012-09-11 9:35 ` [PATCH 06/12] tty/serial/kgdboc: Add and wire up clear_irqs callback Anton Vorontsov
2012-09-11 14:15 ` Alan Cox
2012-09-12 3:32 ` [RFC] " Anton Vorontsov
2012-09-12 3:42 ` Colin Cross
2012-09-12 4:06 ` Anton Vorontsov
2012-09-12 4:40 ` Colin Cross
2012-09-12 7:01 ` Anton Vorontsov
2012-09-12 9:44 ` Alan Cox
2012-09-12 10:32 ` Anton Vorontsov
2012-09-11 9:35 ` [PATCH 07/12] tty/serial/amba-pl011: Implement " Anton Vorontsov
2012-09-11 9:35 ` [PATCH 08/12] tty/serial: Add kgdb_nmi driver Anton Vorontsov
2012-09-11 14:14 ` Alan Cox
2012-09-12 0:41 ` Anton Vorontsov
2012-09-11 9:35 ` [PATCH 09/12] ARM: Move some macros from entry-armv to entry-header Anton Vorontsov
2012-09-11 9:35 ` [PATCH 10/12] ARM: Add KGDB/KDB FIQ debugger generic code Anton Vorontsov
2012-09-11 9:35 ` Anton Vorontsov [this message]
2012-09-11 9:35 ` [PATCH 12/12] ARM: versatile: Make able to use UART ports for KGDB FIQ debugger Anton Vorontsov
-- strict thread matches above, loose matches on Subject: below --
2012-08-20 14:44 [PATCH v4 0/12] KGDB/KDB FIQ (NMI) debugger Anton Vorontsov
2012-08-20 14:47 ` [PATCH 11/12] ARM: VIC: Add a couple of low-level FIQ management helpers Anton Vorontsov
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