63b614522c
The only real user was the assembler floppy interrupt handler, which does not need to be in assembly. This makes it so that there are less pieces of code which know about the internal layout of ivector_table[] and friends. Signed-off-by: David S. Miller <davem@davemloft.net>
153 lines
4.6 KiB
C
153 lines
4.6 KiB
C
/* $Id: irq.h,v 1.21 2002/01/23 11:27:36 davem Exp $
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* irq.h: IRQ registers on the 64-bit Sparc.
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*
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* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
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* Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz)
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*/
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#ifndef _SPARC64_IRQ_H
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#define _SPARC64_IRQ_H
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#include <linux/config.h>
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#include <linux/linkage.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/interrupt.h>
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#include <asm/pil.h>
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#include <asm/ptrace.h>
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/* You should not mess with this directly. That's the job of irq.c.
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*
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* If you make changes here, please update hand coded assembler of
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* the vectored interrupt trap handler in entry.S -DaveM
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*
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* This is currently one DCACHE line, two buckets per L2 cache
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* line. Keep this in mind please.
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*/
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struct ino_bucket {
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/* Next handler in per-CPU PIL worklist. We know that
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* bucket pointers have the high 32-bits clear, so to
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* save space we only store the bits we need.
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*/
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/*0x00*/unsigned int irq_chain;
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/* PIL to schedule this IVEC at. */
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/*0x04*/unsigned char pil;
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/* If an IVEC arrives while irq_info is NULL, we
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* set this to notify request_irq() about the event.
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*/
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/*0x05*/unsigned char pending;
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/* Miscellaneous flags. */
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/*0x06*/unsigned char flags;
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/* This is used to deal with IBF_DMA_SYNC on
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* Sabre systems.
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*/
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/*0x07*/unsigned char synctab_ent;
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/* Reference to handler for this IRQ. If this is
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* non-NULL this means it is active and should be
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* serviced. Else the pending member is set to one
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* and later registry of the interrupt checks for
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* this condition.
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*
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* Normally this is just an irq_action structure.
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* But, on PCI, if multiple interrupt sources behind
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* a bridge have multiple interrupt sources that share
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* the same INO bucket, this points to an array of
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* pointers to four IRQ action structures.
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*/
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/*0x08*/void *irq_info;
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/* Sun5 Interrupt Clear Register. */
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/*0x10*/unsigned long iclr;
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/* Sun5 Interrupt Mapping Register. */
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/*0x18*/unsigned long imap;
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};
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#ifdef CONFIG_PCI
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extern unsigned long pci_dma_wsync;
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extern unsigned long dma_sync_reg_table[256];
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extern unsigned char dma_sync_reg_table_entry;
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#endif
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/* IMAP/ICLR register defines */
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#define IMAP_VALID 0x80000000 /* IRQ Enabled */
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#define IMAP_TID_UPA 0x7c000000 /* UPA TargetID */
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#define IMAP_TID_JBUS 0x7c000000 /* JBUS TargetID */
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#define IMAP_AID_SAFARI 0x7c000000 /* Safari AgentID */
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#define IMAP_NID_SAFARI 0x03e00000 /* Safari NodeID */
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#define IMAP_IGN 0x000007c0 /* IRQ Group Number */
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#define IMAP_INO 0x0000003f /* IRQ Number */
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#define IMAP_INR 0x000007ff /* Full interrupt number*/
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#define ICLR_IDLE 0x00000000 /* Idle state */
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#define ICLR_TRANSMIT 0x00000001 /* Transmit state */
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#define ICLR_PENDING 0x00000003 /* Pending state */
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/* Only 8-bits are available, be careful. -DaveM */
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#define IBF_DMA_SYNC 0x01 /* DMA synchronization behind PCI bridge needed. */
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#define IBF_PCI 0x02 /* Indicates PSYCHO/SABRE/SCHIZO PCI interrupt. */
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#define IBF_ACTIVE 0x04 /* This interrupt is active and has a handler. */
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#define IBF_MULTI 0x08 /* On PCI, indicates shared bucket. */
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#define IBF_INPROGRESS 0x10 /* IRQ is being serviced. */
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#define NUM_IVECS (IMAP_INR + 1)
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extern struct ino_bucket ivector_table[NUM_IVECS];
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#define __irq_ino(irq) \
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(((struct ino_bucket *)(unsigned long)(irq)) - &ivector_table[0])
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#define __irq_pil(irq) ((struct ino_bucket *)(unsigned long)(irq))->pil
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#define __bucket(irq) ((struct ino_bucket *)(unsigned long)(irq))
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#define __irq(bucket) ((unsigned int)(unsigned long)(bucket))
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static __inline__ char *__irq_itoa(unsigned int irq)
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{
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static char buff[16];
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sprintf(buff, "%d,%x", __irq_pil(irq), (unsigned int)__irq_ino(irq));
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return buff;
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}
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#define NR_IRQS 16
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#define irq_canonicalize(irq) (irq)
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extern void disable_irq(unsigned int);
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#define disable_irq_nosync disable_irq
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extern void enable_irq(unsigned int);
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extern unsigned int build_irq(int pil, int inofixup, unsigned long iclr, unsigned long imap);
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extern unsigned int sbus_build_irq(void *sbus, unsigned int ino);
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static __inline__ void set_softint(unsigned long bits)
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{
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__asm__ __volatile__("wr %0, 0x0, %%set_softint"
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: /* No outputs */
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: "r" (bits));
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}
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static __inline__ void clear_softint(unsigned long bits)
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{
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__asm__ __volatile__("wr %0, 0x0, %%clear_softint"
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: /* No outputs */
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: "r" (bits));
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}
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static __inline__ unsigned long get_softint(void)
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{
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unsigned long retval;
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__asm__ __volatile__("rd %%softint, %0"
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: "=r" (retval));
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return retval;
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}
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struct irqaction;
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struct pt_regs;
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int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *);
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#endif
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