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/*
 * Copyright 2010 Tilera Corporation. 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
 *   as published by the Free Software Foundation, version 2.
 *
 *   This program is distributed in the hope that it will be useful, but
 *   WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
 *   NON INFRINGEMENT.  See the GNU General Public License for
 *   more details.
 */

#ifndef _ASM_TILE_IRQ_H
#define _ASM_TILE_IRQ_H

#include <linux/hardirq.h>

/* The hypervisor interface provides 32 IRQs. */
#define NR_IRQS			32

/* IRQ numbers used for linux IPIs. */
#define IRQ_RESCHEDULE	0
/* Interrupts for dynamic allocation start at 1. Let the core allocate irq0 */
#define NR_IRQS_LEGACY	1

#define irq_canonicalize(irq)   (irq)

void ack_bad_irq(unsigned int irq);

/*
 * Different ways of handling interrupts.  Tile interrupts are always
 * per-cpu; there is no global interrupt controller to implement
 * enable/disable.  Most onboard devices can send their interrupts to
 * many tiles at the same time, and Tile-specific drivers know how to
 * deal with this.
 *
 * However, generic devices (usually PCIE based, sometimes GPIO)
 * expect that interrupts will fire on a single core at a time and
 * that the irq can be enabled or disabled from any core at any time.
 * We implement this by directing such interrupts to a single core.
 *
 * One added wrinkle is that PCI interrupts can be either
 * hardware-cleared (legacy interrupts) or software cleared (MSI).
 * Other generic device systems (GPIO) are always software-cleared.
 *
 * The enums below are used by drivers for onboard devices, including
 * the internals of PCI root complex and GPIO.  They allow the driver
 * to tell the generic irq code what kind of interrupt is mapped to a
 * particular IRQ number.
 */
enum {
	/* per-cpu interrupt; use enable/disable_percpu_irq() to mask */
	TILE_IRQ_PERCPU,
	/* global interrupt, hardware responsible for clearing. */
	TILE_IRQ_HW_CLEAR,
	/* global interrupt, software responsible for clearing. */
	TILE_IRQ_SW_CLEAR,
};


/*
 * Paravirtualized drivers should call this when they dynamically
 * allocate a new IRQ or discover an IRQ that was pre-allocated by the
 * hypervisor for use with their particular device.  This gives the
 * IRQ subsystem an opportunity to do interrupt-type-specific
 * initialization.
 *
 * ISSUE: We should modify this API so that registering anything
 * except percpu interrupts also requires providing callback methods
 * for enabling and disabling the interrupt.  This would allow the
 * generic IRQ code to proxy enable/disable_irq() calls back into the
 * PCI subsystem, which in turn could enable or disable the interrupt
 * at the PCI shim.
 */
void tile_irq_activate(unsigned int irq, int tile_irq_type);

void setup_irq_regs(void);

#ifdef __tilegx__
void arch_trigger_cpumask_backtrace(const struct cpumask *mask,
				    bool exclude_self);
#define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace
#endif

#endif /* _ASM_TILE_IRQ_H */

Filemanager

Name Type Size Permission Actions
Kbuild File 439 B 0644
asm-offsets.h File 35 B 0644
atomic.h File 5.14 KB 0644
atomic_32.h File 8.91 KB 0644
atomic_64.h File 5.51 KB 0644
backtrace.h File 3.98 KB 0644
barrier.h File 2.89 KB 0644
bitops.h File 2.37 KB 0644
bitops_32.h File 4.01 KB 0644
bitops_64.h File 2.67 KB 0644
cache.h File 2.6 KB 0644
cacheflush.h File 4.94 KB 0644
checksum.h File 1.23 KB 0644
cmpxchg.h File 3.47 KB 0644
compat.h File 7.38 KB 0644
current.h File 947 B 0644
delay.h File 1.1 KB 0644
device.h File 978 B 0644
div64.h File 319 B 0644
dma-mapping.h File 1.82 KB 0644
dma.h File 762 B 0644
elf.h File 5.42 KB 0644
fixmap.h File 2.73 KB 0644
ftrace.h File 1.08 KB 0644
futex.h File 4.23 KB 0644
hardirq.h File 1.28 KB 0644
hardwall.h File 1.08 KB 0644
highmem.h File 2.08 KB 0644
homecache.h File 4.21 KB 0644
hugetlb.h File 3.04 KB 0644
hv_driver.h File 1.92 KB 0644
ide.h File 758 B 0644
insn.h File 1.79 KB 0644
io.h File 12.43 KB 0644
irq.h File 3.11 KB 0644
irq_work.h File 283 B 0644
irqflags.h File 10.55 KB 0644
jump_label.h File 1.47 KB 0644
kdebug.h File 769 B 0644
kexec.h File 2.23 KB 0644
kgdb.h File 1.99 KB 0644
kmap_types.h File 1.02 KB 0644
kprobes.h File 2.19 KB 0644
linkage.h File 1.46 KB 0644
mmu.h File 965 B 0644
mmu_context.h File 4.5 KB 0644
mmzone.h File 2.07 KB 0644
module.h File 1.12 KB 0644
page.h File 10.32 KB 0644
pci.h File 6.58 KB 0644
percpu.h File 1.79 KB 0644
perf_event.h File 766 B 0644
pgalloc.h File 4.76 KB 0644
pgtable.h File 15.66 KB 0644
pgtable_32.h File 4.08 KB 0644
pgtable_64.h File 5.11 KB 0644
pmc.h File 2.15 KB 0644
processor.h File 10.62 KB 0644
ptrace.h File 2.96 KB 0644
sections.h File 1.37 KB 0644
setup.h File 1.63 KB 0644
sigframe.h File 956 B 0644
signal.h File 1.07 KB 0644
smp.h File 3.98 KB 0644
spinlock.h File 741 B 0644
spinlock_32.h File 2.9 KB 0644
spinlock_64.h File 3.88 KB 0644
spinlock_types.h File 1.58 KB 0644
stack.h File 2.59 KB 0644
string.h File 1.19 KB 0644
switch_to.h File 2.75 KB 0644
syscall.h File 2.88 KB 0644
syscalls.h File 2.35 KB 0644
thread_info.h File 5.54 KB 0644
tile-desc.h File 650 B 0644
tile-desc_32.h File 12.54 KB 0644
tile-desc_64.h File 10.83 KB 0644
timex.h File 1.71 KB 0644
tlb.h File 878 B 0644
tlbflush.h File 3.99 KB 0644
topology.h File 1.52 KB 0644
traps.h File 2.44 KB 0644
uaccess.h File 12.77 KB 0644
unaligned.h File 1.56 KB 0644
unistd.h File 777 B 0644
user.h File 717 B 0644
vdso.h File 1.84 KB 0644
vga.h File 1.05 KB 0644
word-at-a-time.h File 1.07 KB 0644