diff options
Diffstat (limited to 'arch/arm/common')
| -rw-r--r-- | arch/arm/common/gic.c | 60 |
1 files changed, 46 insertions, 14 deletions
diff --git a/arch/arm/common/gic.c b/arch/arm/common/gic.c index 734db99eaee7..016c1aeb847c 100644 --- a/arch/arm/common/gic.c +++ b/arch/arm/common/gic.c @@ -29,6 +29,9 @@ #include <linux/cpu_pm.h> #include <linux/cpumask.h> #include <linux/io.h> +#include <linux/interrupt.h> +#include <linux/percpu.h> +#include <linux/slab.h> #include <asm/irq.h> #include <asm/mach/irq.h> @@ -181,7 +184,7 @@ static int gic_set_affinity(struct irq_data *d, const struct cpumask *mask_val, return -EINVAL; mask = 0xff << shift; - bit = 1 << (cpu + shift); + bit = 1 << (cpu_logical_map(cpu) + shift); spin_lock(&irq_controller_lock); val = readl_relaxed(reg) & ~mask; @@ -260,9 +263,16 @@ static void __init gic_dist_init(struct gic_chip_data *gic, unsigned int irq_start) { unsigned int gic_irqs, irq_limit, i; + u32 cpumask; void __iomem *base = gic->dist_base; - u32 cpumask = 1 << smp_processor_id(); + u32 cpu = 0; + u32 nrppis = 0, ppi_base = 0; +#ifdef CONFIG_SMP + cpu = cpu_logical_map(smp_processor_id()); +#endif + + cpumask = 1 << cpu; cpumask |= cpumask << 8; cpumask |= cpumask << 16; @@ -280,6 +290,23 @@ static void __init gic_dist_init(struct gic_chip_data *gic, gic->gic_irqs = gic_irqs; /* + * Nobody would be insane enough to use PPIs on a secondary + * GIC, right? + */ + if (gic == &gic_data[0]) { + nrppis = (32 - irq_start) & 31; + + /* The GIC only supports up to 16 PPIs. */ + if (nrppis > 16) + BUG(); + + ppi_base = gic->irq_offset + 32 - nrppis; + } + + pr_info("Configuring GIC with %d sources (%d PPIs)\n", + gic_irqs, (gic == &gic_data[0]) ? nrppis : 0); + + /* * Set all global interrupts to be level triggered, active low. */ for (i = 32; i < gic_irqs; i += 16) @@ -314,7 +341,17 @@ static void __init gic_dist_init(struct gic_chip_data *gic, /* * Setup the Linux IRQ subsystem. */ - for (i = irq_start; i < irq_limit; i++) { + for (i = 0; i < nrppis; i++) { + int ppi = i + ppi_base; + + irq_set_percpu_devid(ppi); + irq_set_chip_and_handler(ppi, &gic_chip, + handle_percpu_devid_irq); + irq_set_chip_data(ppi, gic); + set_irq_flags(ppi, IRQF_VALID | IRQF_NOAUTOEN); + } + + for (i = irq_start + nrppis; i < irq_limit; i++) { irq_set_chip_and_handler(i, &gic_chip, handle_fasteoi_irq); irq_set_chip_data(i, gic); set_irq_flags(i, IRQF_VALID | IRQF_PROBE); @@ -557,20 +594,15 @@ void __cpuinit gic_secondary_init(unsigned int gic_nr) gic_cpu_init(&gic_data[gic_nr]); } -void __cpuinit gic_enable_ppi(unsigned int irq) -{ - unsigned long flags; - - local_irq_save(flags); - irq_set_status_flags(irq, IRQ_NOPROBE); - gic_unmask_irq(irq_get_irq_data(irq)); - local_irq_restore(flags); -} - #ifdef CONFIG_SMP void gic_raise_softirq(const struct cpumask *mask, unsigned int irq) { - unsigned long map = *cpus_addr(*mask); + int cpu; + unsigned long map = 0; + + /* Convert our logical CPU mask into a physical one. */ + for_each_cpu(cpu, mask) + map |= 1 << cpu_logical_map(cpu); /* * Ensure that stores to Normal memory are visible to the |