2013-01-18 16:42:16 +07:00
|
|
|
/*
|
|
|
|
* Copyright (C) 2011-12 Synopsys, Inc. (www.synopsys.com)
|
|
|
|
*
|
|
|
|
* 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
|
|
|
|
* published by the Free Software Foundation.
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/interrupt.h>
|
2013-04-11 16:17:36 +07:00
|
|
|
#include <linux/irqchip.h>
|
2013-01-18 16:42:26 +07:00
|
|
|
#include <asm/mach_desc.h>
|
2013-01-18 16:42:18 +07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Late Interrupt system init called from start_kernel for Boot CPU only
|
|
|
|
*
|
|
|
|
* Since slab must already be initialized, platforms can start doing any
|
|
|
|
* needed request_irq( )s
|
|
|
|
*/
|
|
|
|
void __init init_IRQ(void)
|
|
|
|
{
|
2013-01-18 16:42:26 +07:00
|
|
|
/* Any external intc can be setup here */
|
|
|
|
if (machine_desc->init_irq)
|
|
|
|
machine_desc->init_irq();
|
|
|
|
|
2013-04-11 16:17:36 +07:00
|
|
|
/* process the entire interrupt tree in one go */
|
|
|
|
irqchip_init();
|
|
|
|
|
2013-01-18 16:42:23 +07:00
|
|
|
#ifdef CONFIG_SMP
|
|
|
|
/* Master CPU can initialize it's side of IPI */
|
2013-01-18 16:42:26 +07:00
|
|
|
if (machine_desc->init_smp)
|
|
|
|
machine_desc->init_smp(smp_processor_id());
|
2013-01-18 16:42:23 +07:00
|
|
|
#endif
|
2013-01-18 16:42:18 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* "C" Entry point for any ARC ISR, called from low level vector handler
|
|
|
|
* @irq is the vector number read from ICAUSE reg of on-chip intc
|
|
|
|
*/
|
|
|
|
void arch_do_IRQ(unsigned int irq, struct pt_regs *regs)
|
|
|
|
{
|
|
|
|
struct pt_regs *old_regs = set_irq_regs(regs);
|
|
|
|
|
|
|
|
irq_enter();
|
|
|
|
generic_handle_irq(irq);
|
|
|
|
irq_exit();
|
|
|
|
set_irq_regs(old_regs);
|
|
|
|
}
|
|
|
|
|
2014-05-07 16:55:10 +07:00
|
|
|
void arc_request_percpu_irq(int irq, int cpu,
|
|
|
|
irqreturn_t (*isr)(int irq, void *dev),
|
|
|
|
const char *irq_nm,
|
|
|
|
void *percpu_dev)
|
|
|
|
{
|
|
|
|
/* Boot cpu calls request, all call enable */
|
|
|
|
if (!cpu) {
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* These 2 calls are essential to making percpu IRQ APIs work
|
|
|
|
* Ideally these details could be hidden in irq chip map function
|
|
|
|
* but the issue is IPIs IRQs being static (non-DT) and platform
|
|
|
|
* specific, so we can't identify them there.
|
|
|
|
*/
|
|
|
|
irq_set_percpu_devid(irq);
|
|
|
|
irq_modify_status(irq, IRQ_NOAUTOEN, 0); /* @irq, @clr, @set */
|
|
|
|
|
|
|
|
rc = request_percpu_irq(irq, isr, irq_nm, percpu_dev);
|
|
|
|
if (rc)
|
|
|
|
panic("Percpu IRQ request failed for %d\n", irq);
|
|
|
|
}
|
|
|
|
|
|
|
|
enable_percpu_irq(irq, 0);
|
|
|
|
}
|