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intr.h revision 1.37.2.1 
      1 /*	$NetBSD: intr.h,v 1.37.2.1 2016/11/04 14:49:07 pgoyette Exp $	*/
      2 /*	NetBSD intr.h,v 1.15 2004/10/31 10:39:34 yamt Exp	*/
      3 
      4 /*-
      5  * Copyright (c) 1998, 2001 The NetBSD Foundation, Inc.
      6  * All rights reserved.
      7  *
      8  * This code is derived from software contributed to The NetBSD Foundation
      9  * by Charles M. Hannum, and by Jason R. Thorpe.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     30  * POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 #ifndef _XEN_INTR_H_
     34 #define	_XEN_INTR_H_
     35 
     36 #include <machine/intrdefs.h>
     37 
     38 #ifndef _LOCORE
     39 #include <xen/xen.h>
     40 #include <xen/hypervisor.h>
     41 #include <machine/pic.h>
     42 #include <sys/evcnt.h>
     43 
     44 #include "opt_xen.h"
     45 
     46 
     47 struct cpu_info;
     48 /*
     49  * Struct describing an event channel.
     50  */
     51 
     52 struct evtsource {
     53 	int ev_maxlevel;		/* max. IPL for this source */
     54 	uint32_t ev_imask;		/* interrupt mask */
     55 	struct intrhand *ev_handlers;	/* handler chain */
     56 	struct evcnt ev_evcnt;		/* interrupt counter */
     57 	struct cpu_info *ev_cpu;        /* cpu on which this event is bound */
     58 	char ev_evname[32];		/* event counter name */
     59 };
     60 
     61 /*
     62  * Structure describing an interrupt level. struct cpu_info has an array of
     63  * IPL_MAX of theses. The index in the array is equal to the stub number of
     64  * the stubcode as present in vector.s
     65  */
     66 
     67 struct intrstub {
     68 #if 0
     69 	void *ist_entry;
     70 #endif
     71 	void *ist_recurse;
     72 	void *ist_resume;
     73 };
     74 
     75 /* for x86 compatibility */
     76 extern struct intrstub i8259_stubs[];
     77 extern struct intrstub ioapic_edge_stubs[];
     78 extern struct intrstub ioapic_level_stubs[];
     79 
     80 struct iplsource {
     81 	struct intrhand *ipl_handlers;   /* handler chain */
     82 	void *ipl_recurse;               /* entry for spllower */
     83 	void *ipl_resume;                /* entry for doreti */
     84 	struct lwp *ipl_lwp;
     85 	u_long ipl_evt_mask1;	/* pending events for this IPL */
     86 	u_long ipl_evt_mask2[NR_EVENT_CHANNELS];
     87 };
     88 
     89 
     90 
     91 /*
     92  * Interrupt handler chains. These are linked in both the evtsource and
     93  * the iplsource.
     94  * The handler is called with its (single) argument.
     95  */
     96 
     97 struct intrhand {
     98 	int	(*ih_fun)(void *);
     99 	void	*ih_arg;
    100 	int	ih_level;
    101 	int	(*ih_realfun)(void *);
    102 	void	*ih_realarg;
    103 	struct	intrhand *ih_ipl_next;
    104 	struct	intrhand *ih_evt_next;
    105 	struct cpu_info *ih_cpu;
    106 };
    107 
    108 struct xen_intr_handle {
    109 	int pirq; /* also contains the  APIC_INT_* flags if NIOAPIC > 0 */
    110 	int evtch;
    111 };
    112 
    113 extern struct intrstub xenev_stubs[];
    114 
    115 #define IUNMASK(ci,level) (ci)->ci_iunmask[(level)]
    116 
    117 extern void Xspllower(int);
    118 
    119 int splraise(int);
    120 void spllower(int);
    121 
    122 #define SPL_ASSERT_BELOW(x) KDASSERT(curcpu()->ci_ilevel < (x))
    123 
    124 /*
    125  * Miscellaneous
    126  */
    127 #define	spl0()		spllower(IPL_NONE)
    128 #define	splx(x)		spllower(x)
    129 
    130 typedef uint8_t ipl_t;
    131 typedef struct {
    132 	ipl_t _ipl;
    133 } ipl_cookie_t;
    134 
    135 static inline ipl_cookie_t
    136 makeiplcookie(ipl_t ipl)
    137 {
    138 
    139 	return (ipl_cookie_t){._ipl = ipl};
    140 }
    141 
    142 static inline int
    143 splraiseipl(ipl_cookie_t icookie)
    144 {
    145 
    146 	return splraise(icookie._ipl);
    147 }
    148 
    149 #include <sys/spl.h>
    150 
    151 /*
    152  * Stub declarations.
    153  */
    154 
    155 struct pcibus_attach_args;
    156 
    157 typedef int intr_handle_t;
    158 
    159 #ifdef MULTIPROCESSOR
    160 int intr_biglock_wrapper(void *);
    161 #endif
    162 
    163 void intr_default_setup(void);
    164 int x86_nmi(void);
    165 
    166 void *intr_establish(int, struct pic *, int, int, int, int (*)(void *), void *, bool);
    167 void *intr_establish_xname(int, struct pic *, int, int, int, int (*)(void *), void *,
    168     bool, const char *);
    169 void intr_disestablish(struct intrhand *);
    170 const char *intr_string(intr_handle_t);
    171 void cpu_intr_init(struct cpu_info *);
    172 int xen_intr_map(int *, int);
    173 #ifdef INTRDEBUG
    174 void intr_printconfig(void);
    175 #endif
    176 int intr_find_mpmapping(int, int, struct xen_intr_handle *);
    177 struct pic *intr_findpic(int);
    178 void intr_add_pcibus(struct pcibus_attach_args *);
    179 
    180 #ifdef MULTIPROCESSOR
    181 void xen_ipi_init(void);
    182 int xen_send_ipi(struct cpu_info *, uint32_t);
    183 void xen_broadcast_ipi(uint32_t);
    184 #else
    185 #define xen_ipi_init(_1) ((void) 0) /* nothing */
    186 #define xen_send_ipi(_i1, _i2) (0) /* nothing */
    187 #define xen_broadcast_ipi(_i1) ((void) 0) /* nothing */
    188 #endif /* MULTIPROCESSOR */
    189 #endif /* !_LOCORE */
    190 
    191 #endif /* _XEN_INTR_H_ */
    192