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linux/include/asm-powerpc/irq.h
Kumar Gala b9d3f25914 [POWERPC] 86xx: Remove unused IRQ defines 
86xx uses the flat device tree for all its needs so we dont need explicit
IRQ info. Its not clear why this code existed since 86xx never existed in
arch/ppc.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-01-28 09:19:16 -06:00

644 lines
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#ifdef __KERNEL__
#ifndef _ASM_POWERPC_IRQ_H
#define _ASM_POWERPC_IRQ_H
/*
* 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; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/threads.h>
#include <linux/list.h>
#include <linux/radix-tree.h>
#include <asm/types.h>
#include <asm/atomic.h>
#define get_irq_desc(irq) (&irq_desc[(irq)])
/* Define a way to iterate across irqs. */
#define for_each_irq(i) \
for ((i) = 0; (i) < NR_IRQS; ++(i))
extern atomic_t ppc_n_lost_interrupts;
#ifdef CONFIG_PPC_MERGE
/* This number is used when no interrupt has been assigned */
#define NO_IRQ (0)
/* This is a special irq number to return from get_irq() to tell that
* no interrupt happened _and_ ignore it (don't count it as bad). Some
* platforms like iSeries rely on that.
*/
#define NO_IRQ_IGNORE ((unsigned int)-1)
/* Total number of virq in the platform (make it a CONFIG_* option ? */
#define NR_IRQS 512
/* Number of irqs reserved for the legacy controller */
#define NUM_ISA_INTERRUPTS 16
/* This type is the placeholder for a hardware interrupt number. It has to
* be big enough to enclose whatever representation is used by a given
* platform.
*/
typedef unsigned long irq_hw_number_t;
/* Interrupt controller "host" data structure. This could be defined as a
* irq domain controller. That is, it handles the mapping between hardware
* and virtual interrupt numbers for a given interrupt domain. The host
* structure is generally created by the PIC code for a given PIC instance
* (though a host can cover more than one PIC if they have a flat number
* model). It's the host callbacks that are responsible for setting the
* irq_chip on a given irq_desc after it's been mapped.
*
* The host code and data structures are fairly agnostic to the fact that
* we use an open firmware device-tree. We do have references to struct
* device_node in two places: in irq_find_host() to find the host matching
* a given interrupt controller node, and of course as an argument to its
* counterpart host->ops->match() callback. However, those are treated as
* generic pointers by the core and the fact that it's actually a device-node
* pointer is purely a convention between callers and implementation. This
* code could thus be used on other architectures by replacing those two
* by some sort of arch-specific void * "token" used to identify interrupt
* controllers.
*/
struct irq_host;
struct radix_tree_root;
/* Functions below are provided by the host and called whenever a new mapping
* is created or an old mapping is disposed. The host can then proceed to
* whatever internal data structures management is required. It also needs
* to setup the irq_desc when returning from map().
*/
struct irq_host_ops {
/* Match an interrupt controller device node to a host, returns
* 1 on a match
*/
int (*match)(struct irq_host *h, struct device_node *node);
/* Create or update a mapping between a virtual irq number and a hw
* irq number. This is called only once for a given mapping.
*/
int (*map)(struct irq_host *h, unsigned int virq, irq_hw_number_t hw);
/* Dispose of such a mapping */
void (*unmap)(struct irq_host *h, unsigned int virq);
/* Update of such a mapping */
void (*remap)(struct irq_host *h, unsigned int virq, irq_hw_number_t hw);
/* Translate device-tree interrupt specifier from raw format coming
* from the firmware to a irq_hw_number_t (interrupt line number) and
* type (sense) that can be passed to set_irq_type(). In the absence
* of this callback, irq_create_of_mapping() and irq_of_parse_and_map()
* will return the hw number in the first cell and IRQ_TYPE_NONE for
* the type (which amount to keeping whatever default value the
* interrupt controller has for that line)
*/
int (*xlate)(struct irq_host *h, struct device_node *ctrler,
u32 *intspec, unsigned int intsize,
irq_hw_number_t *out_hwirq, unsigned int *out_type);
};
struct irq_host {
struct list_head link;
/* type of reverse mapping technique */
unsigned int revmap_type;
#define IRQ_HOST_MAP_LEGACY 0 /* legacy 8259, gets irqs 1..15 */
#define IRQ_HOST_MAP_NOMAP 1 /* no fast reverse mapping */
#define IRQ_HOST_MAP_LINEAR 2 /* linear map of interrupts */
#define IRQ_HOST_MAP_TREE 3 /* radix tree */
union {
struct {
unsigned int size;
unsigned int *revmap;
} linear;
struct radix_tree_root tree;
} revmap_data;
struct irq_host_ops *ops;
void *host_data;
irq_hw_number_t inval_irq;
/* Optional device node pointer */
struct device_node *of_node;
};
/* The main irq map itself is an array of NR_IRQ entries containing the
* associate host and irq number. An entry with a host of NULL is free.
* An entry can be allocated if it's free, the allocator always then sets
* hwirq first to the host's invalid irq number and then fills ops.
*/
struct irq_map_entry {
irq_hw_number_t hwirq;
struct irq_host *host;
};
extern struct irq_map_entry irq_map[NR_IRQS];
extern irq_hw_number_t virq_to_hw(unsigned int virq);
/**
* irq_alloc_host - Allocate a new irq_host data structure
* @of_node: optional device-tree node of the interrupt controller
* @revmap_type: type of reverse mapping to use
* @revmap_arg: for IRQ_HOST_MAP_LINEAR linear only: size of the map
* @ops: map/unmap host callbacks
* @inval_irq: provide a hw number in that host space that is always invalid
*
* Allocates and initialize and irq_host structure. Note that in the case of
* IRQ_HOST_MAP_LEGACY, the map() callback will be called before this returns
* for all legacy interrupts except 0 (which is always the invalid irq for
* a legacy controller). For a IRQ_HOST_MAP_LINEAR, the map is allocated by
* this call as well. For a IRQ_HOST_MAP_TREE, the radix tree will be allocated
* later during boot automatically (the reverse mapping will use the slow path
* until that happens).
*/
extern struct irq_host *irq_alloc_host(struct device_node *of_node,
unsigned int revmap_type,
unsigned int revmap_arg,
struct irq_host_ops *ops,
irq_hw_number_t inval_irq);
/**
* irq_find_host - Locates a host for a given device node
* @node: device-tree node of the interrupt controller
*/
extern struct irq_host *irq_find_host(struct device_node *node);
/**
* irq_set_default_host - Set a "default" host
* @host: default host pointer
*
* For convenience, it's possible to set a "default" host that will be used
* whenever NULL is passed to irq_create_mapping(). It makes life easier for
* platforms that want to manipulate a few hard coded interrupt numbers that
* aren't properly represented in the device-tree.
*/
extern void irq_set_default_host(struct irq_host *host);
/**
* irq_set_virq_count - Set the maximum number of virt irqs
* @count: number of linux virtual irqs, capped with NR_IRQS
*
* This is mainly for use by platforms like iSeries who want to program
* the virtual irq number in the controller to avoid the reverse mapping
*/
extern void irq_set_virq_count(unsigned int count);
/**
* irq_create_mapping - Map a hardware interrupt into linux virq space
* @host: host owning this hardware interrupt or NULL for default host
* @hwirq: hardware irq number in that host space
*
* Only one mapping per hardware interrupt is permitted. Returns a linux
* virq number.
* If the sense/trigger is to be specified, set_irq_type() should be called
* on the number returned from that call.
*/
extern unsigned int irq_create_mapping(struct irq_host *host,
irq_hw_number_t hwirq);
/**
* irq_dispose_mapping - Unmap an interrupt
* @virq: linux virq number of the interrupt to unmap
*/
extern void irq_dispose_mapping(unsigned int virq);
/**
* irq_find_mapping - Find a linux virq from an hw irq number.
* @host: host owning this hardware interrupt
* @hwirq: hardware irq number in that host space
*
* This is a slow path, for use by generic code. It's expected that an
* irq controller implementation directly calls the appropriate low level
* mapping function.
*/
extern unsigned int irq_find_mapping(struct irq_host *host,
irq_hw_number_t hwirq);
/**
* irq_create_direct_mapping - Allocate a virq for direct mapping
* @host: host to allocate the virq for or NULL for default host
*
* This routine is used for irq controllers which can choose the hardware
* interrupt numbers they generate. In such a case it's simplest to use
* the linux virq as the hardware interrupt number.
*/
extern unsigned int irq_create_direct_mapping(struct irq_host *host);
/**
* irq_radix_revmap - Find a linux virq from a hw irq number.
* @host: host owning this hardware interrupt
* @hwirq: hardware irq number in that host space
*
* This is a fast path, for use by irq controller code that uses radix tree
* revmaps
*/
extern unsigned int irq_radix_revmap(struct irq_host *host,
irq_hw_number_t hwirq);
/**
* irq_linear_revmap - Find a linux virq from a hw irq number.
* @host: host owning this hardware interrupt
* @hwirq: hardware irq number in that host space
*
* This is a fast path, for use by irq controller code that uses linear
* revmaps. It does fallback to the slow path if the revmap doesn't exist
* yet and will create the revmap entry with appropriate locking
*/
extern unsigned int irq_linear_revmap(struct irq_host *host,
irq_hw_number_t hwirq);
/**
* irq_alloc_virt - Allocate virtual irq numbers
* @host: host owning these new virtual irqs
* @count: number of consecutive numbers to allocate
* @hint: pass a hint number, the allocator will try to use a 1:1 mapping
*
* This is a low level function that is used internally by irq_create_mapping()
* and that can be used by some irq controllers implementations for things
* like allocating ranges of numbers for MSIs. The revmaps are left untouched.
*/
extern unsigned int irq_alloc_virt(struct irq_host *host,
unsigned int count,
unsigned int hint);
/**
* irq_free_virt - Free virtual irq numbers
* @virq: virtual irq number of the first interrupt to free
* @count: number of interrupts to free
*
* This function is the opposite of irq_alloc_virt. It will not clear reverse
* maps, this should be done previously by unmap'ing the interrupt. In fact,
* all interrupts covered by the range being freed should have been unmapped
* prior to calling this.
*/
extern void irq_free_virt(unsigned int virq, unsigned int count);
/* -- OF helpers -- */
/* irq_create_of_mapping - Map a hardware interrupt into linux virq space
* @controller: Device node of the interrupt controller
* @inspec: Interrupt specifier from the device-tree
* @intsize: Size of the interrupt specifier from the device-tree
*
* This function is identical to irq_create_mapping except that it takes
* as input informations straight from the device-tree (typically the results
* of the of_irq_map_*() functions.
*/
extern unsigned int irq_create_of_mapping(struct device_node *controller,
u32 *intspec, unsigned int intsize);
/* irq_of_parse_and_map - Parse nad Map an interrupt into linux virq space
* @device: Device node of the device whose interrupt is to be mapped
* @index: Index of the interrupt to map
*
* This function is a wrapper that chains of_irq_map_one() and
* irq_create_of_mapping() to make things easier to callers
*/
extern unsigned int irq_of_parse_and_map(struct device_node *dev, int index);
/* -- End OF helpers -- */
/**
* irq_early_init - Init irq remapping subsystem
*/
extern void irq_early_init(void);
static __inline__ int irq_canonicalize(int irq)
{
return irq;
}
#else /* CONFIG_PPC_MERGE */
/* This number is used when no interrupt has been assigned */
#define NO_IRQ (-1)
#define NO_IRQ_IGNORE (-2)
/*
* These constants are used for passing information about interrupt
* signal polarity and level/edge sensing to the low-level PIC chip
* drivers.
*/
#define IRQ_SENSE_MASK 0x1
#define IRQ_SENSE_LEVEL 0x1 /* interrupt on active level */
#define IRQ_SENSE_EDGE 0x0 /* interrupt triggered by edge */
#define IRQ_POLARITY_MASK 0x2
#define IRQ_POLARITY_POSITIVE 0x2 /* high level or low->high edge */
#define IRQ_POLARITY_NEGATIVE 0x0 /* low level or high->low edge */
#if defined(CONFIG_40x)
#include <asm/ibm4xx.h>
#ifndef NR_BOARD_IRQS
#define NR_BOARD_IRQS 0
#endif
#ifndef UIC_WIDTH /* Number of interrupts per device */
#define UIC_WIDTH 32
#endif
#ifndef NR_UICS /* number of UIC devices */
#define NR_UICS 1
#endif
#if defined (CONFIG_403)
/*
* The PowerPC 403 cores' Asynchronous Interrupt Controller (AIC) has
* 32 possible interrupts, a majority of which are not implemented on
* all cores. There are six configurable, external interrupt pins and
* there are eight internal interrupts for the on-chip serial port
* (SPU), DMA controller, and JTAG controller.
*
*/
#define NR_AIC_IRQS 32
#define NR_IRQS (NR_AIC_IRQS + NR_BOARD_IRQS)
#elif !defined (CONFIG_403)
/*
* The PowerPC 405 cores' Universal Interrupt Controller (UIC) has 32
* possible interrupts as well. There are seven, configurable external
* interrupt pins and there are 17 internal interrupts for the on-chip
* serial port, DMA controller, on-chip Ethernet controller, PCI, etc.
*
*/
#define NR_UIC_IRQS UIC_WIDTH
#define NR_IRQS ((NR_UIC_IRQS * NR_UICS) + NR_BOARD_IRQS)
#endif
#elif defined(CONFIG_44x)
#include <asm/ibm44x.h>
#define NR_UIC_IRQS 32
#define NR_IRQS ((NR_UIC_IRQS * NR_UICS) + NR_BOARD_IRQS)
#elif defined(CONFIG_8xx)
/* Now include the board configuration specific associations.
*/
#include <asm/mpc8xx.h>
/* The MPC8xx cores have 16 possible interrupts. There are eight
* possible level sensitive interrupts assigned and generated internally
* from such devices as CPM, PCMCIA, RTC, PIT, TimeBase and Decrementer.
* There are eight external interrupts (IRQs) that can be configured
* as either level or edge sensitive.
*
* On some implementations, there is also the possibility of an 8259
* through the PCI and PCI-ISA bridges.
*
* We are "flattening" the interrupt vectors of the cascaded CPM
* and 8259 interrupt controllers so that we can uniquely identify
* any interrupt source with a single integer.
*/
#define NR_SIU_INTS 16
#define NR_CPM_INTS 32
#ifndef NR_8259_INTS
#define NR_8259_INTS 0
#endif
#define SIU_IRQ_OFFSET 0
#define CPM_IRQ_OFFSET (SIU_IRQ_OFFSET + NR_SIU_INTS)
#define I8259_IRQ_OFFSET (CPM_IRQ_OFFSET + NR_CPM_INTS)
#define NR_IRQS (NR_SIU_INTS + NR_CPM_INTS + NR_8259_INTS)
/* These values must be zero-based and map 1:1 with the SIU configuration.
* They are used throughout the 8xx I/O subsystem to generate
* interrupt masks, flags, and other control patterns. This is why the
* current kernel assumption of the 8259 as the base controller is such
* a pain in the butt.
*/
#define SIU_IRQ0 (0) /* Highest priority */
#define SIU_LEVEL0 (1)
#define SIU_IRQ1 (2)
#define SIU_LEVEL1 (3)
#define SIU_IRQ2 (4)
#define SIU_LEVEL2 (5)
#define SIU_IRQ3 (6)
#define SIU_LEVEL3 (7)
#define SIU_IRQ4 (8)
#define SIU_LEVEL4 (9)
#define SIU_IRQ5 (10)
#define SIU_LEVEL5 (11)
#define SIU_IRQ6 (12)
#define SIU_LEVEL6 (13)
#define SIU_IRQ7 (14)
#define SIU_LEVEL7 (15)
#define MPC8xx_INT_FEC1 SIU_LEVEL1
#define MPC8xx_INT_FEC2 SIU_LEVEL3
#define MPC8xx_INT_SCC1 (CPM_IRQ_OFFSET + CPMVEC_SCC1)
#define MPC8xx_INT_SCC2 (CPM_IRQ_OFFSET + CPMVEC_SCC2)
#define MPC8xx_INT_SCC3 (CPM_IRQ_OFFSET + CPMVEC_SCC3)
#define MPC8xx_INT_SCC4 (CPM_IRQ_OFFSET + CPMVEC_SCC4)
#define MPC8xx_INT_SMC1 (CPM_IRQ_OFFSET + CPMVEC_SMC1)
#define MPC8xx_INT_SMC2 (CPM_IRQ_OFFSET + CPMVEC_SMC2)
/* The internal interrupts we can configure as we see fit.
* My personal preference is CPM at level 2, which puts it above the
* MBX PCI/ISA/IDE interrupts.
*/
#ifndef PIT_INTERRUPT
#define PIT_INTERRUPT SIU_LEVEL0
#endif
#ifndef CPM_INTERRUPT
#define CPM_INTERRUPT SIU_LEVEL2
#endif
#ifndef PCMCIA_INTERRUPT
#define PCMCIA_INTERRUPT SIU_LEVEL6
#endif
#ifndef DEC_INTERRUPT
#define DEC_INTERRUPT SIU_LEVEL7
#endif
/* Some internal interrupt registers use an 8-bit mask for the interrupt
* level instead of a number.
*/
#define mk_int_int_mask(IL) (1 << (7 - (IL/2)))
#else /* CONFIG_40x + CONFIG_8xx */
/*
* this is the # irq's for all ppc arch's (pmac/chrp/prep)
* so it is the max of them all
*/
#define NR_IRQS 256
#define __DO_IRQ_CANON 1
#ifndef CONFIG_8260
#define NUM_8259_INTERRUPTS 16
#else /* CONFIG_8260 */
/* The 8260 has an internal interrupt controller with a maximum of
* 64 IRQs. We will use NR_IRQs from above since it is large enough.
* Don't be confused by the 8260 documentation where they list an
* "interrupt number" and "interrupt vector". We are only interested
* in the interrupt vector. There are "reserved" holes where the
* vector number increases, but the interrupt number in the table does not.
* (Document errata updates have fixed this...make sure you have up to
* date processor documentation -- Dan).
*/
#ifndef CPM_IRQ_OFFSET
#define CPM_IRQ_OFFSET 0
#endif
#define NR_CPM_INTS 64
#define SIU_INT_ERROR ((uint)0x00 + CPM_IRQ_OFFSET)
#define SIU_INT_I2C ((uint)0x01 + CPM_IRQ_OFFSET)
#define SIU_INT_SPI ((uint)0x02 + CPM_IRQ_OFFSET)
#define SIU_INT_RISC ((uint)0x03 + CPM_IRQ_OFFSET)
#define SIU_INT_SMC1 ((uint)0x04 + CPM_IRQ_OFFSET)
#define SIU_INT_SMC2 ((uint)0x05 + CPM_IRQ_OFFSET)
#define SIU_INT_IDMA1 ((uint)0x06 + CPM_IRQ_OFFSET)
#define SIU_INT_IDMA2 ((uint)0x07 + CPM_IRQ_OFFSET)
#define SIU_INT_IDMA3 ((uint)0x08 + CPM_IRQ_OFFSET)
#define SIU_INT_IDMA4 ((uint)0x09 + CPM_IRQ_OFFSET)
#define SIU_INT_SDMA ((uint)0x0a + CPM_IRQ_OFFSET)
#define SIU_INT_USB ((uint)0x0b + CPM_IRQ_OFFSET)
#define SIU_INT_TIMER1 ((uint)0x0c + CPM_IRQ_OFFSET)
#define SIU_INT_TIMER2 ((uint)0x0d + CPM_IRQ_OFFSET)
#define SIU_INT_TIMER3 ((uint)0x0e + CPM_IRQ_OFFSET)
#define SIU_INT_TIMER4 ((uint)0x0f + CPM_IRQ_OFFSET)
#define SIU_INT_TMCNT ((uint)0x10 + CPM_IRQ_OFFSET)
#define SIU_INT_PIT ((uint)0x11 + CPM_IRQ_OFFSET)
#define SIU_INT_PCI ((uint)0x12 + CPM_IRQ_OFFSET)
#define SIU_INT_IRQ1 ((uint)0x13 + CPM_IRQ_OFFSET)
#define SIU_INT_IRQ2 ((uint)0x14 + CPM_IRQ_OFFSET)
#define SIU_INT_IRQ3 ((uint)0x15 + CPM_IRQ_OFFSET)
#define SIU_INT_IRQ4 ((uint)0x16 + CPM_IRQ_OFFSET)
#define SIU_INT_IRQ5 ((uint)0x17 + CPM_IRQ_OFFSET)
#define SIU_INT_IRQ6 ((uint)0x18 + CPM_IRQ_OFFSET)
#define SIU_INT_IRQ7 ((uint)0x19 + CPM_IRQ_OFFSET)
#define SIU_INT_FCC1 ((uint)0x20 + CPM_IRQ_OFFSET)
#define SIU_INT_FCC2 ((uint)0x21 + CPM_IRQ_OFFSET)
#define SIU_INT_FCC3 ((uint)0x22 + CPM_IRQ_OFFSET)
#define SIU_INT_MCC1 ((uint)0x24 + CPM_IRQ_OFFSET)
#define SIU_INT_MCC2 ((uint)0x25 + CPM_IRQ_OFFSET)
#define SIU_INT_SCC1 ((uint)0x28 + CPM_IRQ_OFFSET)
#define SIU_INT_SCC2 ((uint)0x29 + CPM_IRQ_OFFSET)
#define SIU_INT_SCC3 ((uint)0x2a + CPM_IRQ_OFFSET)
#define SIU_INT_SCC4 ((uint)0x2b + CPM_IRQ_OFFSET)
#define SIU_INT_PC15 ((uint)0x30 + CPM_IRQ_OFFSET)
#define SIU_INT_PC14 ((uint)0x31 + CPM_IRQ_OFFSET)
#define SIU_INT_PC13 ((uint)0x32 + CPM_IRQ_OFFSET)
#define SIU_INT_PC12 ((uint)0x33 + CPM_IRQ_OFFSET)
#define SIU_INT_PC11 ((uint)0x34 + CPM_IRQ_OFFSET)
#define SIU_INT_PC10 ((uint)0x35 + CPM_IRQ_OFFSET)
#define SIU_INT_PC9 ((uint)0x36 + CPM_IRQ_OFFSET)
#define SIU_INT_PC8 ((uint)0x37 + CPM_IRQ_OFFSET)
#define SIU_INT_PC7 ((uint)0x38 + CPM_IRQ_OFFSET)
#define SIU_INT_PC6 ((uint)0x39 + CPM_IRQ_OFFSET)
#define SIU_INT_PC5 ((uint)0x3a + CPM_IRQ_OFFSET)
#define SIU_INT_PC4 ((uint)0x3b + CPM_IRQ_OFFSET)
#define SIU_INT_PC3 ((uint)0x3c + CPM_IRQ_OFFSET)
#define SIU_INT_PC2 ((uint)0x3d + CPM_IRQ_OFFSET)
#define SIU_INT_PC1 ((uint)0x3e + CPM_IRQ_OFFSET)
#define SIU_INT_PC0 ((uint)0x3f + CPM_IRQ_OFFSET)
#endif /* CONFIG_8260 */
#endif /* Whatever way too big #ifdef */
#define NR_MASK_WORDS ((NR_IRQS + 31) / 32)
/* pedantic: these are long because they are used with set_bit --RR */
extern unsigned long ppc_cached_irq_mask[NR_MASK_WORDS];
/*
* Because many systems have two overlapping names spaces for
* interrupts (ISA and XICS for example), and the ISA interrupts
* have historically not been easy to renumber, we allow ISA
* interrupts to take values 0 - 15, and shift up the remaining
* interrupts by 0x10.
*/
#define NUM_ISA_INTERRUPTS 0x10
extern int __irq_offset_value;
static inline int irq_offset_up(int irq)
{
return(irq + __irq_offset_value);
}
static inline int irq_offset_down(int irq)
{
return(irq - __irq_offset_value);
}
static inline int irq_offset_value(void)
{
return __irq_offset_value;
}
#ifdef __DO_IRQ_CANON
extern int ppc_do_canonicalize_irqs;
#else
#define ppc_do_canonicalize_irqs 0
#endif
static __inline__ int irq_canonicalize(int irq)
{
if (ppc_do_canonicalize_irqs && irq == 2)
irq = 9;
return irq;
}
#endif /* CONFIG_PPC_MERGE */
extern int distribute_irqs;
struct irqaction;
struct pt_regs;
#define __ARCH_HAS_DO_SOFTIRQ
extern void __do_softirq(void);
#ifdef CONFIG_IRQSTACKS
/*
* Per-cpu stacks for handling hard and soft interrupts.
*/
extern struct thread_info *hardirq_ctx[NR_CPUS];
extern struct thread_info *softirq_ctx[NR_CPUS];
extern void irq_ctx_init(void);
extern void call_do_softirq(struct thread_info *tp);
extern int call_handle_irq(int irq, void *p1,
struct thread_info *tp, void *func);
#else
#define irq_ctx_init()
#endif /* CONFIG_IRQSTACKS */
extern void do_IRQ(struct pt_regs *regs);
#endif /* _ASM_IRQ_H */
#endif /* __KERNEL__ */
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