2010-05-29 03:09:12 +00:00
|
|
|
/*
|
|
|
|
* 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 1
|
|
|
|
|
arch/tile: various header improvements for building drivers
This change adds a number of missing headers in asm (fb.h, parport.h,
serial.h, and vga.h) using the minimal generic versions.
It also adds a number of missing interfaces that showed up as build
failures when trying to build various drivers not normally included in the
"tile" distribution: ioremap_wc(), memset_io(), io{read,write}{16,32}be(),
virt_to_bus(), bus_to_virt(), irq_canonicalize(), __pte(), __pgd(),
and __pmd(). I also added a cast in virt_to_page() since not all callers
pass a pointer.
I fixed <asm/stat.h> to properly include a __KERNEL__ guard for the
__ARCH_WANT_STAT64 symbol, and <asm/swab.h> to use __builtin_bswap32()
even for our 64-bit architecture, since the same code is produced.
I added an export for get_cycles(), since it's used in some modules.
And I made <arch/spr_def.h> properly include the __KERNEL__ guard,
even though it's not yet exported, since it likely will be soon.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2011-05-02 20:06:42 +00:00
|
|
|
#define irq_canonicalize(irq) (irq)
|
|
|
|
|
2010-05-29 03:09:12 +00:00
|
|
|
void ack_bad_irq(unsigned int irq);
|
|
|
|
|
|
|
|
/*
|
2010-06-25 20:41:11 +00:00
|
|
|
* 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.
|
2010-05-29 03:09:12 +00:00
|
|
|
*/
|
2010-06-25 20:41:11 +00:00
|
|
|
void tile_irq_activate(unsigned int irq, int tile_irq_type);
|
|
|
|
|
|
|
|
void setup_irq_regs(void);
|
2010-05-29 03:09:12 +00:00
|
|
|
|
|
|
|
#endif /* _ASM_TILE_IRQ_H */
|