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Subject[RFC PATCH 5/5] gic: initialize interrupts as per argument
Date
From: Abhijeet Dharmapurikar <adharmap@quicinc.com>

Initialize interrupts as per an argument passed instead of initializing
them as active level low triggered interrupts.

Signed-off-by: Abhijeet Dharmapurikar <adharmap@quicinc.com>
---
Configuring level triggered interrupts as default may not be correct on
some platforms, this changes the default behaviour of the gic_dist_init
function and also adds a flag to indicate whether the default should be level
or edge.
an argument.
arch/arm/common/gic.c | 25 ++++++++++++++++++-------
arch/arm/include/asm/hardware/gic.h | 3 ++-
arch/arm/mach-omap2/board-4430sdp.c | 3 ++-
arch/arm/mach-realview/realview_eb.c | 10 +++++++---
arch/arm/mach-realview/realview_pb1176.c | 7 +++++--
arch/arm/mach-realview/realview_pb11mp.c | 7 +++++--
arch/arm/mach-realview/realview_pba8.c | 4 +++-
arch/arm/mach-realview/realview_pbx.c | 5 +++--
arch/arm/mach-ux500/cpu-u8500.c | 2 +-
9 files changed, 46 insertions(+), 20 deletions(-)
diff --git a/arch/arm/common/gic.c b/arch/arm/common/gic.c
index d47a1d7..1437f8e 100644
--- a/arch/arm/common/gic.c
+++ b/arch/arm/common/gic.c
@@ -236,10 +236,11 @@ void __init gic_cascade_irq(unsigned int gic_nr, unsigned int irq)
/*
* In case of multiple cascaded GICs, order calls to gic_dist_init with
* ascending irq_start
+ * flags are checked to initialize the config registers to level or edge
*/

void __init gic_dist_init(unsigned int gic_nr, void __iomem *base,
- unsigned int irq_start)
+ unsigned int irq_start, unsigned int flags)
{
unsigned int max_irq, i;
u32 cpumask = 1 << smp_processor_id();
@@ -269,11 +270,17 @@ void __init gic_dist_init(unsigned int gic_nr, void __iomem *base,
if (max_irq > max(1020, NR_IRQS))
max_irq = max(1020, NR_IRQS);

- /*
- * Set all global interrupts to be level triggered, active low.
- */
- for (i = 32; i < max_irq; i += 16)
- writel(0, base + GIC_DIST_CONFIG + i * 4 / 16);
+ /* default to level trigger if nothing specified */
+ if ((flags & IRQ_TYPE_SENSE_MASK) == 0)
+ flags |= IRQ_TYPE_LEVEL_LOW;
+
+ if (flags & (IRQ_TYPE_LEVEL_HIGH|IRQ_TYPE_LEVEL_LOW)) {
+ for (i = 32; i < max_irq; i += 16)
+ writel(0, base + GIC_DIST_CONFIG + i * 4 / 16);
+ } else {
+ for (i = 16; i < max_irq; i += 16)
+ writel(0xFFFFFFFF, base + GIC_DIST_CONFIG + i * 4 / 16);
+ }

/*
* Set all global interrupts to this CPU only.
@@ -293,13 +300,17 @@ void __init gic_dist_init(unsigned int gic_nr, void __iomem *base,
for (i = 0; i < max_irq; i += 32)
writel(0xffffffff, base + GIC_DIST_ENABLE_CLEAR + i * 4 / 32);

+
/*
* Setup the Linux IRQ subsystem.
*/
for (i = irq_start; i < NR_IRQS && i < gic_data[gic_nr].irq_offset + max_irq; i++) {
set_irq_chip(i, &gic_chip);
set_irq_chip_data(i, &gic_data[gic_nr]);
- set_irq_handler(i, handle_level_irq);
+ if (flags & (IRQ_TYPE_LEVEL_HIGH|IRQ_TYPE_LEVEL_LOW))
+ set_irq_handler(i, handle_level_irq);
+ else
+ set_irq_handler(i, handle_edge_irq);
set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
}

diff --git a/arch/arm/include/asm/hardware/gic.h b/arch/arm/include/asm/hardware/gic.h
index 7f34333..7ebccdc 100644
--- a/arch/arm/include/asm/hardware/gic.h
+++ b/arch/arm/include/asm/hardware/gic.h
@@ -33,7 +33,8 @@
#define GIC_DIST_SOFTINT 0xf00

#ifndef __ASSEMBLY__
-void gic_dist_init(unsigned int gic_nr, void __iomem *base, unsigned int irq_start);
+void gic_dist_init(unsigned int gic_nr, void __iomem *base,
+ unsigned int irq_start, unsigned int flags);
void gic_cpu_init(unsigned int gic_nr, void __iomem *base);
void gic_cascade_irq(unsigned int gic_nr, unsigned int irq);
void gic_raise_softirq(const struct cpumask *mask, unsigned int irq);
diff --git a/arch/arm/mach-omap2/board-4430sdp.c b/arch/arm/mach-omap2/board-4430sdp.c
index 0c6be6b..1f895e9 100644
--- a/arch/arm/mach-omap2/board-4430sdp.c
+++ b/arch/arm/mach-omap2/board-4430sdp.c
@@ -17,6 +17,7 @@
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/gpio.h>
+#include <linux/irq.h>

#include <mach/hardware.h>
#include <asm/mach-types.h>
@@ -57,7 +58,7 @@ static void __init gic_init_irq(void)
/* Static mapping, never released */
base = ioremap(OMAP44XX_GIC_DIST_BASE, SZ_4K);
BUG_ON(!base);
- gic_dist_init(0, base, 29);
+ gic_dist_init(0, base, 29, IRQ_TYPE_LEVEL_LOW);

/* Static mapping, never released */
gic_cpu_base_addr = ioremap(OMAP44XX_GIC_CPU_BASE, SZ_512);
diff --git a/arch/arm/mach-realview/realview_eb.c b/arch/arm/mach-realview/realview_eb.c
index 7d857d3..cb119f9 100644
--- a/arch/arm/mach-realview/realview_eb.c
+++ b/arch/arm/mach-realview/realview_eb.c
@@ -26,6 +26,7 @@
#include <linux/amba/pl061.h>
#include <linux/amba/mmci.h>
#include <linux/io.h>
+#include <linux/irq.h>

#include <mach/hardware.h>
#include <asm/irq.h>
@@ -308,19 +309,22 @@ static void __init gic_init_irq(void)

/* core tile GIC, primary */
gic_cpu_base_addr = __io_address(REALVIEW_EB11MP_GIC_CPU_BASE);
- gic_dist_init(0, __io_address(REALVIEW_EB11MP_GIC_DIST_BASE), 29);
+ gic_dist_init(0, __io_address(REALVIEW_EB11MP_GIC_DIST_BASE),
+ 29, IRQ_TYPE_LEVEL_LOW);
gic_cpu_init(0, gic_cpu_base_addr);

#ifndef CONFIG_REALVIEW_EB_ARM11MP_REVB
/* board GIC, secondary */
- gic_dist_init(1, __io_address(REALVIEW_EB_GIC_DIST_BASE), 64);
+ gic_dist_init(1, __io_address(REALVIEW_EB_GIC_DIST_BASE),
+ 64, IRQ_TYPE_LEVEL_LOW);
gic_cpu_init(1, __io_address(REALVIEW_EB_GIC_CPU_BASE));
gic_cascade_irq(1, IRQ_EB11MP_EB_IRQ1);
#endif
} else {
/* board GIC, primary */
gic_cpu_base_addr = __io_address(REALVIEW_EB_GIC_CPU_BASE);
- gic_dist_init(0, __io_address(REALVIEW_EB_GIC_DIST_BASE), 29);
+ gic_dist_init(0, __io_address(REALVIEW_EB_GIC_DIST_BASE),
+ 29, IRQ_TYPE_LEVEL_LOW);
gic_cpu_init(0, gic_cpu_base_addr);
}
}
diff --git a/arch/arm/mach-realview/realview_pb1176.c b/arch/arm/mach-realview/realview_pb1176.c
index 44392e5..1e218f2 100644
--- a/arch/arm/mach-realview/realview_pb1176.c
+++ b/arch/arm/mach-realview/realview_pb1176.c
@@ -26,6 +26,7 @@
#include <linux/amba/pl061.h>
#include <linux/amba/mmci.h>
#include <linux/io.h>
+#include <linux/irq.h>

#include <mach/hardware.h>
#include <asm/irq.h>
@@ -267,11 +268,13 @@ static void __init gic_init_irq(void)
{
/* ARM1176 DevChip GIC, primary */
gic_cpu_base_addr = __io_address(REALVIEW_DC1176_GIC_CPU_BASE);
- gic_dist_init(0, __io_address(REALVIEW_DC1176_GIC_DIST_BASE), IRQ_DC1176_GIC_START);
+ gic_dist_init(0, __io_address(REALVIEW_DC1176_GIC_DIST_BASE),
+ IRQ_DC1176_GIC_START, IRQ_TYPE_LEVEL_LOW);
gic_cpu_init(0, gic_cpu_base_addr);

/* board GIC, secondary */
- gic_dist_init(1, __io_address(REALVIEW_PB1176_GIC_DIST_BASE), IRQ_PB1176_GIC_START);
+ gic_dist_init(1, __io_address(REALVIEW_PB1176_GIC_DIST_BASE),
+ IRQ_PB1176_GIC_START, IRQ_TYPE_LEVEL_LOW);
gic_cpu_init(1, __io_address(REALVIEW_PB1176_GIC_CPU_BASE));
gic_cascade_irq(1, IRQ_DC1176_PB_IRQ1);
}
diff --git a/arch/arm/mach-realview/realview_pb11mp.c b/arch/arm/mach-realview/realview_pb11mp.c
index 3e02731..2d45f9f 100644
--- a/arch/arm/mach-realview/realview_pb11mp.c
+++ b/arch/arm/mach-realview/realview_pb11mp.c
@@ -26,6 +26,7 @@
#include <linux/amba/pl061.h>
#include <linux/amba/mmci.h>
#include <linux/io.h>
+#include <linux/irq.h>

#include <mach/hardware.h>
#include <asm/irq.h>
@@ -273,11 +274,13 @@ static void __init gic_init_irq(void)

/* ARM11MPCore test chip GIC, primary */
gic_cpu_base_addr = __io_address(REALVIEW_TC11MP_GIC_CPU_BASE);
- gic_dist_init(0, __io_address(REALVIEW_TC11MP_GIC_DIST_BASE), 29);
+ gic_dist_init(0, __io_address(REALVIEW_TC11MP_GIC_DIST_BASE),
+ 29, IRQ_TYPE_LEVEL_LOW);
gic_cpu_init(0, gic_cpu_base_addr);

/* board GIC, secondary */
- gic_dist_init(1, __io_address(REALVIEW_PB11MP_GIC_DIST_BASE), IRQ_PB11MP_GIC_START);
+ gic_dist_init(1, __io_address(REALVIEW_PB11MP_GIC_DIST_BASE),
+ IRQ_PB11MP_GIC_START, IRQ_TYPE_LEVEL_LOW);
gic_cpu_init(1, __io_address(REALVIEW_PB11MP_GIC_CPU_BASE));
gic_cascade_irq(1, IRQ_TC11MP_PB_IRQ1);
}
diff --git a/arch/arm/mach-realview/realview_pba8.c b/arch/arm/mach-realview/realview_pba8.c
index fe4e25c..efdebcf 100644
--- a/arch/arm/mach-realview/realview_pba8.c
+++ b/arch/arm/mach-realview/realview_pba8.c
@@ -26,6 +26,7 @@
#include <linux/amba/pl061.h>
#include <linux/amba/mmci.h>
#include <linux/io.h>
+#include <linux/irq.h>

#include <asm/irq.h>
#include <asm/leds.h>
@@ -254,7 +255,8 @@ static void __init gic_init_irq(void)
{
/* ARM PB-A8 on-board GIC */
gic_cpu_base_addr = __io_address(REALVIEW_PBA8_GIC_CPU_BASE);
- gic_dist_init(0, __io_address(REALVIEW_PBA8_GIC_DIST_BASE), IRQ_PBA8_GIC_START);
+ gic_dist_init(0, __io_address(REALVIEW_PBA8_GIC_DIST_BASE),
+ IRQ_PBA8_GIC_START, IRQ_TYPE_LEVEL_LOW);
gic_cpu_init(0, __io_address(REALVIEW_PBA8_GIC_CPU_BASE));
}

diff --git a/arch/arm/mach-realview/realview_pbx.c b/arch/arm/mach-realview/realview_pbx.c
index a21a4b3..f1aa686 100644
--- a/arch/arm/mach-realview/realview_pbx.c
+++ b/arch/arm/mach-realview/realview_pbx.c
@@ -25,6 +25,7 @@
#include <linux/amba/pl061.h>
#include <linux/amba/mmci.h>
#include <linux/io.h>
+#include <linux/irq.h>

#include <asm/irq.h>
#include <asm/leds.h>
@@ -276,12 +277,12 @@ static void __init gic_init_irq(void)
if (core_tile_pbx11mp() || core_tile_pbxa9mp()) {
gic_cpu_base_addr = __io_address(REALVIEW_PBX_TILE_GIC_CPU_BASE);
gic_dist_init(0, __io_address(REALVIEW_PBX_TILE_GIC_DIST_BASE),
- 29);
+ 29, IRQ_TYPE_LEVEL_LOW);
gic_cpu_init(0, __io_address(REALVIEW_PBX_TILE_GIC_CPU_BASE));
} else {
gic_cpu_base_addr = __io_address(REALVIEW_PBX_GIC_CPU_BASE);
gic_dist_init(0, __io_address(REALVIEW_PBX_GIC_DIST_BASE),
- IRQ_PBX_GIC_START);
+ IRQ_PBX_GIC_START, IRQ_TYPE_LEVEL_LOW);
gic_cpu_init(0, __io_address(REALVIEW_PBX_GIC_CPU_BASE));
}
}
diff --git a/arch/arm/mach-ux500/cpu-u8500.c b/arch/arm/mach-ux500/cpu-u8500.c
index 5f05e58..68028fe 100644
--- a/arch/arm/mach-ux500/cpu-u8500.c
+++ b/arch/arm/mach-ux500/cpu-u8500.c
@@ -48,7 +48,7 @@ void __init u8500_map_io(void)

void __init u8500_init_irq(void)
{
- gic_dist_init(0, __io_address(U8500_GIC_DIST_BASE), 29);
+ gic_dist_init(0, __io_address(U8500_GIC_DIST_BASE), 29, IRQ_TYPE_LEVEL_LOW);
gic_cpu_init(0, __io_address(U8500_GIC_CPU_BASE));
}

--
1.5.6.3


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