LCOM1920-T02G10

/*        $NetBSD: intr.h,v 1.48 2015/08/17 06:16:02 knakahara Exp $        */

/*-

 * Copyright (c) 1998, 2001, 2006, 2007, 2008 The NetBSD Foundation, Inc.

 * All rights reserved.

 *

 * This code is derived from software contributed to The NetBSD Foundation

 * by Charles M. Hannum, and by Jason R. Thorpe.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS

 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED

 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS

 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 * POSSIBILITY OF SUCH DAMAGE.

 */

#ifndef _X86_INTR_H_

#define _X86_INTR_H_

#define        __HAVE_FAST_SOFTINTS

#define        __HAVE_PREEMPTION

#ifdef _KERNEL

#include <sys/types.h>

#else

#include <stdbool.h>

#endif

#include <sys/evcnt.h>

#include <sys/queue.h>

#include <machine/intrdefs.h>

#ifndef _LOCORE

#include <machine/pic.h>

/*

 * Struct describing an interrupt source for a CPU. struct cpu_info

 * has an array of MAX_INTR_SOURCES of these. The index in the array

 * is equal to the stub number of the stubcode as present in vector.s

 *

 * The primary CPU's array of interrupt sources has its first 16

 * entries reserved for legacy ISA irq handlers. This means that

 * they have a 1:1 mapping for arrayindex:irq_num. This is not

 * true for interrupts that come in through IO APICs, to find

 * their source, go through ci->ci_isources[index].is_pic

 *

 * It's possible to always maintain a 1:1 mapping, but that means

 * limiting the total number of interrupt sources to MAX_INTR_SOURCES

 * (32), instead of 32 per CPU. It also would mean that having multiple

 * IO APICs which deliver interrupts from an equal pin number would

 * overlap if they were to be sent to the same CPU.

 */

struct intrstub {

        void *ist_entry;

        void *ist_recurse; 

        void *ist_resume;

};

struct percpu_evcnt {

        cpuid_t cpuid;

        uint64_t count;

};

struct intrsource {

        int is_maxlevel;                /* max. IPL for this source */

        int is_pin;                        /* IRQ for legacy; pin for IO APIC,

                                           -1 for MSI */

        struct intrhand *is_handlers;        /* handler chain */

        struct pic *is_pic;                /* originating PIC */

        void *is_recurse;                /* entry for spllower */

        void *is_resume;                /* entry for doreti */

        lwp_t *is_lwp;                        /* for soft interrupts */

        struct evcnt is_evcnt;                /* interrupt counter per cpu */

        int is_flags;                        /* see below */

        int is_type;                        /* level, edge */

        int is_idtvec;

        int is_minlevel;

        char is_evname[32];                /* event counter name */

        char is_intrid[INTRIDBUF];        /* intrid created by create_intrid() */

        char is_xname[INTRDEVNAMEBUF];        /* device names */

        cpuid_t is_active_cpu;                /* active cpuid */

        struct percpu_evcnt *is_saved_evcnt;        /* interrupt count of deactivated cpus */

        SIMPLEQ_ENTRY(intrsource) is_list;        /* link of intrsources */

};

#define IS_LEGACY        0x0001                /* legacy ISA irq source */

#define IS_IPI                0x0002

#define IS_LOG                0x0004

/*

 * Interrupt handler chains.  *_intr_establish() insert a handler into

 * the list.  The handler is called with its (single) argument.

 */

struct intrhand {

        int        (*ih_fun)(void *);

        void        *ih_arg;

        int        ih_level;

        int        (*ih_realfun)(void *);

        void        *ih_realarg;

        struct        intrhand *ih_next;

        struct        intrhand **ih_prevp;

        int        ih_pin;

        int        ih_slot;

        struct cpu_info *ih_cpu;

};

#define IMASK(ci,level) (ci)->ci_imask[(level)]

#define IUNMASK(ci,level) (ci)->ci_iunmask[(level)]

#ifdef _KERNEL

void Xspllower(int);

void spllower(int);

int splraise(int);

void softintr(int);

/*

 * Convert spl level to local APIC level

 */

#define APIC_LEVEL(l)   ((l) << 4)

/*

 * Miscellaneous

 */

#define SPL_ASSERT_BELOW(x) KDASSERT(curcpu()->ci_ilevel < (x))

#define        spl0()                spllower(IPL_NONE)

#define        splx(x)                spllower(x)

typedef uint8_t ipl_t;

typedef struct {

        ipl_t _ipl;

} ipl_cookie_t;

static inline ipl_cookie_t

makeiplcookie(ipl_t ipl)

{

        return (ipl_cookie_t){._ipl = ipl};

}

static inline int

splraiseipl(ipl_cookie_t icookie)

{

        return splraise(icookie._ipl);

}

#include <sys/spl.h>

/*

 * Stub declarations.

 */

void Xsoftintr(void);

void Xpreemptrecurse(void);

void Xpreemptresume(void);

extern struct intrstub i8259_stubs[];

extern struct intrstub ioapic_edge_stubs[];

extern struct intrstub ioapic_level_stubs[];

struct cpu_info;

struct pcibus_attach_args;

typedef uint64_t intr_handle_t;

void intr_default_setup(void);

void x86_nmi(void);

void *intr_establish_xname(int, struct pic *, int, int, int, int (*)(void *),

                           void *, bool, const char *);

void *intr_establish(int, struct pic *, int, int, int, int (*)(void *), void *, bool);

void intr_disestablish(struct intrhand *);

void intr_add_pcibus(struct pcibus_attach_args *);

const char *intr_string(intr_handle_t, char *, size_t);

void cpu_intr_init(struct cpu_info *);

int intr_find_mpmapping(int, int, intr_handle_t *);

struct pic *intr_findpic(int);

void intr_printconfig(void);

struct intrsource *intr_allocate_io_intrsource(const char *);

void intr_free_io_intrsource(const char *);

int x86_send_ipi(struct cpu_info *, int);

void x86_broadcast_ipi(int);

void x86_ipi_handler(void);

extern void (* const ipifunc[X86_NIPI])(struct cpu_info *);

#endif /* _KERNEL */

#endif /* !_LOCORE */

#endif /* !_X86_INTR_H_ */