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Software of the Month Club 2000 October
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Software of the Month - Ultimate Collection Shareware 277.iso
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ASM-SPAR.{_A
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IRQ.H
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1999-09-17
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/* $Id: irq.h,v 1.14 1998/12/19 11:05:41 davem Exp $
* irq.h: IRQ registers on the 64-bit Sparc.
*
* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
* Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz)
*/
#ifndef _SPARC64_IRQ_H
#define _SPARC64_IRQ_H
#include <linux/linkage.h>
#include <linux/kernel.h>
struct devid_cookie {
int dummy;
};
/* You should not mess with this directly. That's the job of irq.c.
*
* If you make changes here, please update hand coded assembler of
* SBUS/floppy interrupt handler in entry.S -DaveM
*
* This is currently one DCACHE line, two buckets per L2 cache
* line. Keep this in mind please.
*/
struct ino_bucket {
/* Next handler in per-CPU PIL worklist. We know that
* bucket pointers have the high 32-bits clear, so to
* save space we only store the bits we need.
*/
/*0x00*/unsigned int irq_chain;
/* PIL to schedule this IVEC at. */
/*0x04*/unsigned char pil;
/* If an IVEC arrives while irq_info is NULL, we
* set this to notify request_irq() about the event.
*/
/*0x05*/unsigned char pending;
/* Miscellaneous flags. */
/*0x06*/unsigned char flags;
/* Unused right now, but we will use it for proper
* enable_irq()/disable_irq() nesting.
*/
/*0x07*/unsigned char __unused;
/* Reference to handler for this IRQ. If this is
* non-NULL this means it is active and should be
* serviced. Else the pending member is set to one
* and later registry of the interrupt checks for
* this condition.
*
* Normally this is just an irq_action structure.
* But, on PCI, if multiple interrupt sources behind
* a bridge have multiple interrupt sources that share
* the same INO bucket, this points to an array of
* pointers to four IRQ action structures.
*/
/*0x08*/void *irq_info;
/* Sun5 Interrupt Clear Register. */
/*0x10*/unsigned int *iclr;
/* Sun5 Interrupt Mapping Register. */
/*0x18*/unsigned int *imap;
};
#define NUM_IVECS 8192
extern struct ino_bucket ivector_table[NUM_IVECS];
#define __irq_ino(irq) \
(((struct ino_bucket *)(unsigned long)(irq)) - &ivector_table[0])
#define __irq_pil(irq) ((struct ino_bucket *)(unsigned long)(irq))->pil
static __inline__ char *__irq_itoa(unsigned int irq)
{
static char buff[16];
sprintf(buff, "%d,%x", __irq_pil(irq), (unsigned int)__irq_ino(irq));
return buff;
}
#define NR_IRQS 15
extern void disable_irq(unsigned int);
extern void enable_irq(unsigned int);
extern void init_timers(void (*lvl10_irq)(int, void *, struct pt_regs *),
unsigned long *);
extern unsigned int build_irq(int pil, int inofixup, unsigned int *iclr, unsigned int *imap);
extern unsigned int sbus_build_irq(void *sbus, unsigned int ino);
extern unsigned int psycho_build_irq(void *psycho, int imap_off, int ino, int need_dma_sync);
#ifdef __SMP__
extern void set_cpu_int(int, int);
extern void clear_cpu_int(int, int);
extern void set_irq_udt(int);
#endif
extern int request_fast_irq(unsigned int irq,
void (*handler)(int, void *, struct pt_regs *),
unsigned long flags, __const__ char *devname,
void *dev_id);
extern __inline__ void set_softint(unsigned long bits)
{
__asm__ __volatile__("wr %0, 0x0, %%set_softint"
: /* No outputs */
: "r" (bits));
}
extern __inline__ void clear_softint(unsigned long bits)
{
__asm__ __volatile__("wr %0, 0x0, %%clear_softint"
: /* No outputs */
: "r" (bits));
}
extern __inline__ unsigned long get_softint(void)
{
unsigned long retval;
__asm__ __volatile__("rd %%softint, %0"
: "=r" (retval));
return retval;
}
#endif