irq_64.h

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/* irq.h: IRQ registers on the 64-bit Sparc.
 *
 * Copyright (C) 1996 David S. Miller ([email protected])
 * Copyright (C) 1998 Jakub Jelinek ([email protected])
 */

#ifndef _SPARC64_IRQ_H
#define _SPARC64_IRQ_H

#include <linux/linkage.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <asm/pil.h>
#include <asm/ptrace.h>

/* IMAP/ICLR register defines */
#define IMAP_VALID      0x80000000UL    /* IRQ Enabled      */
#define IMAP_TID_UPA        0x7c000000UL    /* UPA TargetID     */
#define IMAP_TID_JBUS       0x7c000000UL    /* JBUS TargetID    */
#define IMAP_TID_SHIFT      26
#define IMAP_AID_SAFARI     0x7c000000UL    /* Safari AgentID   */
#define IMAP_AID_SHIFT      26
#define IMAP_NID_SAFARI     0x03e00000UL    /* Safari NodeID    */
#define IMAP_NID_SHIFT      21
#define IMAP_IGN        0x000007c0UL    /* IRQ Group Number */
#define IMAP_INO        0x0000003fUL    /* IRQ Number       */
#define IMAP_INR        0x000007ffUL    /* Full interrupt number*/

#define ICLR_IDLE       0x00000000UL    /* Idle state       */
#define ICLR_TRANSMIT       0x00000001UL    /* Transmit state   */
#define ICLR_PENDING        0x00000003UL    /* Pending state    */

/* The largest number of unique interrupt sources we support.
 * If this needs to ever be larger than 255, you need to change
 * the type of ino_bucket->irq as appropriate.
 *
 * ino_bucket->irq allocation is made during {sun4v_,}build_irq().
 */
#define NR_IRQS    255

extern void irq_install_pre_handler(int irq,
                    void (*func)(unsigned int, void *, void *),
                    void *arg1, void *arg2);
#define irq_canonicalize(irq)   (irq)
extern unsigned int build_irq(int inofixup, unsigned long iclr, unsigned long imap);
extern unsigned int sun4v_build_irq(u32 devhandle, unsigned int devino);
extern unsigned int sun4v_build_virq(u32 devhandle, unsigned int devino);
extern unsigned int sun4v_build_msi(u32 devhandle, unsigned int *irq_p,
                    unsigned int msi_devino_start,
                    unsigned int msi_devino_end);
extern void sun4v_destroy_msi(unsigned int irq);
extern unsigned int sun4u_build_msi(u32 portid, unsigned int *irq_p,
                    unsigned int msi_devino_start,
                    unsigned int msi_devino_end,
                    unsigned long imap_base,
                    unsigned long iclr_base);
extern void sun4u_destroy_msi(unsigned int irq);

extern unsigned char irq_alloc(unsigned int dev_handle,
                    unsigned int dev_ino);
#ifdef CONFIG_PCI_MSI
extern void irq_free(unsigned int irq);
#endif

extern void __init init_IRQ(void);
extern void fixup_irqs(void);

static inline void set_softint(unsigned long bits)
{
    __asm__ __volatile__("wr    %0, 0x0, %%set_softint"
                 : /* No outputs */
                 : "r" (bits));
}

static inline void clear_softint(unsigned long bits)
{
    __asm__ __volatile__("wr    %0, 0x0, %%clear_softint"
                 : /* No outputs */
                 : "r" (bits));
}

static inline unsigned long get_softint(void)
{
    unsigned long retval;

    __asm__ __volatile__("rd    %%softint, %0"
                 : "=r" (retval));
    return retval;
}

void arch_trigger_all_cpu_backtrace(void);
#define arch_trigger_all_cpu_backtrace arch_trigger_all_cpu_backtrace

extern void *hardirq_stack[NR_CPUS];
extern void *softirq_stack[NR_CPUS];
#define __ARCH_HAS_DO_SOFTIRQ

#define NO_IRQ      0xffffffff

#endif