From 2db1499784da653f7e257d98fefdebc65fde7c40 Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Tue, 6 Sep 2011 09:56:17 +0100 Subject: [PATCH] ARM: omap2/3: Add global omap2/3_intc_handle_irq() functions Provide the OMAP2/3 IRQ code with low level handlers that can be used by platforms using CONFIG_MULTI_IRQ_HANDLER. Though the handlers are written in C, the compiled code looks very similar to its assembly counterpart (at least with my gcc 4.4.1). Tested-by: Tony Lindgren Signed-off-by: Marc Zyngier --- arch/arm/mach-omap2/irq.c | 50 ++++++++++++++++++++++++++ arch/arm/plat-omap/include/plat/irqs.h | 2 ++ 2 files changed, 52 insertions(+) diff --git a/arch/arm/mach-omap2/irq.c b/arch/arm/mach-omap2/irq.c index 65f1be6a182c..ec52bee0e089 100644 --- a/arch/arm/mach-omap2/irq.c +++ b/arch/arm/mach-omap2/irq.c @@ -15,6 +15,7 @@ #include #include #include +#include #include @@ -35,6 +36,11 @@ /* Number of IRQ state bits in each MIR register */ #define IRQ_BITS_PER_REG 32 +#define OMAP2_IRQ_BASE OMAP2_L4_IO_ADDRESS(OMAP24XX_IC_BASE) +#define OMAP3_IRQ_BASE OMAP2_L4_IO_ADDRESS(OMAP34XX_IC_BASE) +#define INTCPS_SIR_IRQ_OFFSET 0x0040 /* omap2/3 active interrupt offset */ +#define ACTIVEIRQ_MASK 0x7f /* omap2/3 active interrupt bits */ + /* * OMAP2 has a number of different interrupt controllers, each interrupt * controller is identified as its own "bank". Register definitions are @@ -191,6 +197,44 @@ void __init ti816x_init_irq(void) omap_init_irq(OMAP34XX_IC_BASE, 128); } +static inline void omap_intc_handle_irq(void __iomem *base_addr, struct pt_regs *regs) +{ + u32 irqnr; + + do { + irqnr = readl_relaxed(base_addr + 0x98); + if (irqnr) + goto out; + + irqnr = readl_relaxed(base_addr + 0xb8); + if (irqnr) + goto out; + + irqnr = readl_relaxed(base_addr + 0xd8); +#ifdef CONFIG_SOC_OMAPTI816X + if (irqnr) + goto out; + irqnr = readl_relaxed(base_addr + 0xf8); +#endif + +out: + if (!irqnr) + break; + + irqnr = readl_relaxed(base_addr + INTCPS_SIR_IRQ_OFFSET); + irqnr &= ACTIVEIRQ_MASK; + + if (irqnr) + handle_IRQ(irqnr, regs); + } while (irqnr); +} + +asmlinkage void __exception_irq_entry omap2_intc_handle_irq(struct pt_regs *regs) +{ + void __iomem *base_addr = OMAP2_IRQ_BASE; + omap_intc_handle_irq(base_addr, regs); +} + #ifdef CONFIG_ARCH_OMAP3 static struct omap3_intc_regs intc_context[ARRAY_SIZE(irq_banks)]; @@ -263,4 +307,10 @@ void omap3_intc_resume_idle(void) /* Re-enable autoidle */ intc_bank_write_reg(1, &irq_banks[0], INTC_SYSCONFIG); } + +asmlinkage void __exception_irq_entry omap3_intc_handle_irq(struct pt_regs *regs) +{ + void __iomem *base_addr = OMAP3_IRQ_BASE; + omap_intc_handle_irq(base_addr, regs); +} #endif /* CONFIG_ARCH_OMAP3 */ diff --git a/arch/arm/plat-omap/include/plat/irqs.h b/arch/arm/plat-omap/include/plat/irqs.h index 30e10719b774..8b19a63fab68 100644 --- a/arch/arm/plat-omap/include/plat/irqs.h +++ b/arch/arm/plat-omap/include/plat/irqs.h @@ -448,6 +448,8 @@ void omap_intc_restore_context(void); void omap3_intc_suspend(void); void omap3_intc_prepare_idle(void); void omap3_intc_resume_idle(void); +void omap2_intc_handle_irq(struct pt_regs *regs); +void omap3_intc_handle_irq(struct pt_regs *regs); #endif #include -- 2.30.2