irq.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:5k
- /* $Id: irq.h,v 1.20.2.1 2002/03/03 10:31:56 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/config.h>
- #include <linux/linkage.h>
- #include <linux/kernel.h>
- #include <asm/pil.h>
- #include <asm/ptrace.h>
- /* 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;
- /* This is used to deal with IBF_DMA_SYNC on
- * Sabre systems.
- */
- /*0x07*/unsigned char synctab_ent;
- /* 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 long iclr;
- /* Sun5 Interrupt Mapping Register. */
- /*0x18*/unsigned long imap;
- };
- #ifdef CONFIG_PCI
- extern unsigned long pci_dma_wsync;
- extern unsigned long dma_sync_reg_table[256];
- extern unsigned char dma_sync_reg_table_entry;
- #endif
- /* IMAP/ICLR register defines */
- #define IMAP_VALID 0x80000000 /* IRQ Enabled */
- #define IMAP_TID_UPA 0x7c000000 /* UPA TargetID */
- #define IMAP_AID_SAFARI 0x7c000000 /* Safari AgentID */
- #define IMAP_NID_SAFARI 0x03e00000 /* Safari NodeID */
- #define IMAP_IGN 0x000007c0 /* IRQ Group Number */
- #define IMAP_INO 0x0000003f /* IRQ Number */
- #define IMAP_INR 0x000007ff /* Full interrupt number*/
- #define ICLR_IDLE 0x00000000 /* Idle state */
- #define ICLR_TRANSMIT 0x00000001 /* Transmit state */
- #define ICLR_PENDING 0x00000003 /* Pending state */
- /* Only 8-bits are available, be careful. -DaveM */
- #define IBF_DMA_SYNC 0x01 /* DMA synchronization behind PCI bridge needed. */
- #define IBF_PCI 0x02 /* Indicates PSYCHO/SABRE/SCHIZO PCI interrupt. */
- #define IBF_ACTIVE 0x04 /* This interrupt is active and has a handler. */
- #define IBF_MULTI 0x08 /* On PCI, indicates shared bucket. */
- #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
- #define __bucket(irq) ((struct ino_bucket *)(unsigned long)(irq))
- #define __irq(bucket) ((unsigned int)(unsigned long)(bucket))
- 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);
- #define disable_irq_nosync disable_irq
- 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 long iclr, unsigned long 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 CONFIG_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