diff options
Diffstat (limited to 'drivers/sh/intc.c')
| -rw-r--r-- | drivers/sh/intc.c | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/drivers/sh/intc.c b/drivers/sh/intc.c index c2750391fd3..94ad6bd86a0 100644 --- a/drivers/sh/intc.c +++ b/drivers/sh/intc.c @@ -2,7 +2,7 @@ * Shared interrupt handling code for IPR and INTC2 types of IRQs. * * Copyright (C) 2007, 2008 Magnus Damm - * Copyright (C) 2009 Paul Mundt + * Copyright (C) 2009, 2010 Paul Mundt * * Based on intc2.c and ipr.c * @@ -20,12 +20,14 @@ #include <linux/irq.h> #include <linux/module.h> #include <linux/io.h> +#include <linux/slab.h> #include <linux/interrupt.h> #include <linux/sh_intc.h> #include <linux/sysdev.h> #include <linux/list.h> #include <linux/topology.h> #include <linux/bitmap.h> +#include <linux/cpumask.h> #define _INTC_MK(fn, mode, addr_e, addr_d, width, shift) \ ((shift) | ((width) << 5) | ((fn) << 9) | ((mode) << 13) | \ @@ -234,6 +236,10 @@ static inline void _intc_enable(unsigned int irq, unsigned long handle) unsigned int cpu; for (cpu = 0; cpu < SMP_NR(d, _INTC_ADDR_E(handle)); cpu++) { +#ifdef CONFIG_SMP + if (!cpumask_test_cpu(cpu, irq_to_desc(irq)->affinity)) + continue; +#endif addr = INTC_REG(d, _INTC_ADDR_E(handle), cpu); intc_enable_fns[_INTC_MODE(handle)](addr, handle, intc_reg_fns\ [_INTC_FN(handle)], irq); @@ -253,6 +259,10 @@ static void intc_disable(unsigned int irq) unsigned int cpu; for (cpu = 0; cpu < SMP_NR(d, _INTC_ADDR_D(handle)); cpu++) { +#ifdef CONFIG_SMP + if (!cpumask_test_cpu(cpu, irq_to_desc(irq)->affinity)) + continue; +#endif addr = INTC_REG(d, _INTC_ADDR_D(handle), cpu); intc_disable_fns[_INTC_MODE(handle)](addr, handle,intc_reg_fns\ [_INTC_FN(handle)], irq); @@ -301,6 +311,23 @@ static int intc_set_wake(unsigned int irq, unsigned int on) return 0; /* allow wakeup, but setup hardware in intc_suspend() */ } +#ifdef CONFIG_SMP +/* + * This is held with the irq desc lock held, so we don't require any + * additional locking here at the intc desc level. The affinity mask is + * later tested in the enable/disable paths. + */ +static int intc_set_affinity(unsigned int irq, const struct cpumask *cpumask) +{ + if (!cpumask_intersects(cpumask, cpu_online_mask)) + return -1; + + cpumask_copy(irq_to_desc(irq)->affinity, cpumask); + + return 0; +} +#endif + static void intc_mask_ack(unsigned int irq) { struct intc_desc_int *d = get_intc_desc(irq); @@ -847,6 +874,9 @@ void __init register_intc_controller(struct intc_desc *desc) d->chip.shutdown = intc_disable; d->chip.set_type = intc_set_sense; d->chip.set_wake = intc_set_wake; +#ifdef CONFIG_SMP + d->chip.set_affinity = intc_set_affinity; +#endif if (hw->ack_regs) { for (i = 0; i < hw->nr_ack_regs; i++) |