home *** CD-ROM | disk | FTP | other *** search
- /* $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
-