diff options
Diffstat (limited to 'driver/gator_events_irq.c')
| -rw-r--r-- | driver/gator_events_irq.c | 38 |
1 files changed, 31 insertions, 7 deletions
diff --git a/driver/gator_events_irq.c b/driver/gator_events_irq.c index 36a6589..59461b9 100644 --- a/driver/gator_events_irq.c +++ b/driver/gator_events_irq.c @@ -1,5 +1,5 @@ /** - * Copyright (C) ARM Limited 2010-2011. All rights reserved. + * Copyright (C) ARM Limited 2010-2012. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as @@ -72,15 +72,38 @@ static int gator_events_irq_create_files(struct super_block *sb, struct dentry * return 0; } -static int gator_events_irq_start(void) +static int gator_events_irq_online(int** buffer) { - int cpu, i; + int len = 0, cpu = smp_processor_id(); + unsigned long flags; // not necessary as we are in interrupt context anyway, but doesn't hurt + + // synchronization with the irq_exit functions is not necessary as the values are being reset + if (hardirq_enabled) { + local_irq_save(flags); + per_cpu(irqCnt, cpu)[HARDIRQ] = 0; + local_irq_restore(flags); + per_cpu(irqPrev, cpu)[HARDIRQ] = 0; + per_cpu(irqGet, cpu)[len++] = hardirq_key; + per_cpu(irqGet, cpu)[len++] = 0; + } - for_each_present_cpu(cpu) { - for (i = 0; i < TOTALIRQ; i++) - per_cpu(irqPrev, cpu)[i] = 0; + if (softirq_enabled) { + local_irq_save(flags); + per_cpu(irqCnt, cpu)[SOFTIRQ] = 0; + local_irq_restore(flags); + per_cpu(irqPrev, cpu)[SOFTIRQ] = 0; + per_cpu(irqGet, cpu)[len++] = softirq_key; + per_cpu(irqGet, cpu)[len++] = 0; } + if (buffer) + *buffer = per_cpu(irqGet, cpu); + + return len; +} + +static int gator_events_irq_start(void) +{ // register tracepoints if (hardirq_enabled) if (GATOR_REGISTER_TRACE(irq_handler_exit)) @@ -116,7 +139,7 @@ static void gator_events_irq_stop(void) static int gator_events_irq_read(int **buffer) { - unsigned long flags; + unsigned long flags; // not necessary as we are in interrupt context anyway, but doesn't hurt int len, value; int cpu = smp_processor_id(); @@ -153,6 +176,7 @@ static int gator_events_irq_read(int **buffer) static struct gator_interface gator_events_irq_interface = { .create_files = gator_events_irq_create_files, + .online = gator_events_irq_online, .start = gator_events_irq_start, .stop = gator_events_irq_stop, .read = gator_events_irq_read, |