diff options
Diffstat (limited to 'arch/arm/common/gic.c')
-rw-r--r-- | arch/arm/common/gic.c | 14 |
1 files changed, 0 insertions, 14 deletions
diff --git a/arch/arm/common/gic.c b/arch/arm/common/gic.c index 7dfa9a85bc0c..ada6359160eb 100644 --- a/arch/arm/common/gic.c +++ b/arch/arm/common/gic.c | |||
@@ -67,25 +67,11 @@ static inline unsigned int gic_irq(unsigned int irq) | |||
67 | 67 | ||
68 | /* | 68 | /* |
69 | * Routines to acknowledge, disable and enable interrupts | 69 | * Routines to acknowledge, disable and enable interrupts |
70 | * | ||
71 | * Linux assumes that when we're done with an interrupt we need to | ||
72 | * unmask it, in the same way we need to unmask an interrupt when | ||
73 | * we first enable it. | ||
74 | * | ||
75 | * The GIC has a separate notion of "end of interrupt" to re-enable | ||
76 | * an interrupt after handling, in order to support hardware | ||
77 | * prioritisation. | ||
78 | * | ||
79 | * We can make the GIC behave in the way that Linux expects by making | ||
80 | * our "acknowledge" routine disable the interrupt, then mark it as | ||
81 | * complete. | ||
82 | */ | 70 | */ |
83 | static void gic_ack_irq(unsigned int irq) | 71 | static void gic_ack_irq(unsigned int irq) |
84 | { | 72 | { |
85 | u32 mask = 1 << (irq % 32); | ||
86 | 73 | ||
87 | spin_lock(&irq_controller_lock); | 74 | spin_lock(&irq_controller_lock); |
88 | writel(mask, gic_dist_base(irq) + GIC_DIST_ENABLE_CLEAR + (gic_irq(irq) / 32) * 4); | ||
89 | writel(gic_irq(irq), gic_cpu_base(irq) + GIC_CPU_EOI); | 75 | writel(gic_irq(irq), gic_cpu_base(irq) + GIC_CPU_EOI); |
90 | spin_unlock(&irq_controller_lock); | 76 | spin_unlock(&irq_controller_lock); |
91 | } | 77 | } |