diff options
Diffstat (limited to 'arch/arm/mach-mv78xx0/irq.c')
| -rw-r--r-- | arch/arm/mach-mv78xx0/irq.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/arm/mach-mv78xx0/irq.c b/arch/arm/mach-mv78xx0/irq.c index 32073444024b..2453c33faccf 100644 --- a/arch/arm/mach-mv78xx0/irq.c +++ b/arch/arm/mach-mv78xx0/irq.c @@ -11,6 +11,7 @@ #include <linux/kernel.h> #include <linux/irq.h> #include <linux/io.h> +#include <asm/exception.h> #include <mach/bridge-regs.h> #include <plat/orion-gpio.h> #include <plat/irq.h> @@ -23,12 +24,44 @@ static int __initdata gpio0_irqs[4] = { IRQ_MV78XX0_GPIO_24_31, }; +static void __iomem *mv78xx0_irq_base = IRQ_VIRT_BASE; + +static asmlinkage void +__exception_irq_entry mv78xx0_legacy_handle_irq(struct pt_regs *regs) +{ + u32 stat; + + stat = readl_relaxed(mv78xx0_irq_base + IRQ_CAUSE_LOW_OFF); + stat &= readl_relaxed(mv78xx0_irq_base + IRQ_MASK_LOW_OFF); + if (stat) { + unsigned int hwirq = __fls(stat); + handle_IRQ(hwirq, regs); + return; + } + stat = readl_relaxed(mv78xx0_irq_base + IRQ_CAUSE_HIGH_OFF); + stat &= readl_relaxed(mv78xx0_irq_base + IRQ_MASK_HIGH_OFF); + if (stat) { + unsigned int hwirq = 32 + __fls(stat); + handle_IRQ(hwirq, regs); + return; + } + stat = readl_relaxed(mv78xx0_irq_base + IRQ_CAUSE_ERR_OFF); + stat &= readl_relaxed(mv78xx0_irq_base + IRQ_MASK_ERR_OFF); + if (stat) { + unsigned int hwirq = 64 + __fls(stat); + handle_IRQ(hwirq, regs); + return; + } +} + void __init mv78xx0_init_irq(void) { orion_irq_init(0, IRQ_VIRT_BASE + IRQ_MASK_LOW_OFF); orion_irq_init(32, IRQ_VIRT_BASE + IRQ_MASK_HIGH_OFF); orion_irq_init(64, IRQ_VIRT_BASE + IRQ_MASK_ERR_OFF); + set_handle_irq(mv78xx0_legacy_handle_irq); + /* * Initialize gpiolib for GPIOs 0-31. (The GPIO interrupt mask * registers for core #1 are at an offset of 0x18 from those of |