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intr.h revision 1.34 
      1 /*	$NetBSD: intr.h,v 1.34 2012/02/17 18:40:19 bouyer 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 <xen/evtchn.h>
     42 #include <machine/pic.h>
     43 #include <sys/evcnt.h>
     44 
     45 #include "opt_xen.h"
     46 
     47 
     48 struct cpu_info;
     49 /*
     50  * Struct describing an event channel.
     51  */
     52 
     53 struct evtsource {
     54 	int ev_maxlevel;		/* max. IPL for this source */
     55 	uint32_t ev_imask;		/* interrupt mask */
     56 	struct intrhand *ev_handlers;	/* handler chain */
     57 	struct evcnt ev_evcnt;		/* interrupt counter */
     58 	struct cpu_info *ev_cpu;        /* cpu on which this event is bound */
     59 	char ev_evname[32];		/* event counter name */
     60 };
     61 
     62 /*
     63  * Structure describing an interrupt level. struct cpu_info has an array of
     64  * IPL_MAX of theses. The index in the array is equal to the stub number of
     65  * the stubcode as present in vector.s
     66  */
     67 
     68 struct intrstub {
     69 #if 0
     70 	void *ist_entry;
     71 #endif
     72 	void *ist_recurse;
     73 	void *ist_resume;
     74 };
     75 
     76 /* for x86 compatibility */
     77 extern struct intrstub i8259_stubs[];
     78 extern struct intrstub ioapic_edge_stubs[];
     79 extern struct intrstub ioapic_level_stubs[];
     80 
     81 struct iplsource {
     82 	struct intrhand *ipl_handlers;   /* handler chain */
     83 	void *ipl_recurse;               /* entry for spllower */
     84 	void *ipl_resume;                /* entry for doreti */
     85 	struct lwp *ipl_lwp;
     86 	u_long ipl_evt_mask1;	/* pending events for this IPL */
     87 	u_long ipl_evt_mask2[NR_EVENT_CHANNELS];
     88 };
     89 
     90 
     91 
     92 /*
     93  * Interrupt handler chains. These are linked in both the evtsource and
     94  * the iplsource.
     95  * The handler is called with its (single) argument.
     96  */
     97 
     98 struct intrhand {
     99 	int	(*ih_fun)(void *);
    100 	void	*ih_arg;
    101 	int	ih_level;
    102 	int	(*ih_realfun)(void *);
    103 	void	*ih_realarg;
    104 	struct	intrhand *ih_ipl_next;
    105 	struct	intrhand *ih_evt_next;
    106 	struct cpu_info *ih_cpu;
    107 };
    108 
    109 struct xen_intr_handle {
    110 	int pirq; /* also contains the  APIC_INT_* flags if NIOAPIC > 0 */
    111 	int evtch;
    112 };
    113 
    114 extern struct intrstub xenev_stubs[];
    115 
    116 #define IUNMASK(ci,level) (ci)->ci_iunmask[(level)]
    117 
    118 extern void Xspllower(int);
    119 
    120 int splraise(int);
    121 void spllower(int);
    122 
    123 #define SPL_ASSERT_BELOW(x) KDASSERT(curcpu()->ci_ilevel < (x))
    124 
    125 /*
    126  * Miscellaneous
    127  */
    128 #define	spl0()		spllower(IPL_NONE)
    129 #define	splx(x)		spllower(x)
    130 
    131 typedef uint8_t ipl_t;
    132 typedef struct {
    133 	ipl_t _ipl;
    134 } ipl_cookie_t;
    135 
    136 static inline ipl_cookie_t
    137 makeiplcookie(ipl_t ipl)
    138 {
    139 
    140 	return (ipl_cookie_t){._ipl = ipl};
    141 }
    142 
    143 static inline int
    144 splraiseipl(ipl_cookie_t icookie)
    145 {
    146 
    147 	return splraise(icookie._ipl);
    148 }
    149 
    150 #include <sys/spl.h>
    151 
    152 /*
    153  * Stub declarations.
    154  */
    155 
    156 struct pcibus_attach_args;
    157 
    158 #ifdef MULTIPROCESSOR
    159 int intr_biglock_wrapper(void *);
    160 #endif
    161 
    162 void intr_default_setup(void);
    163 int x86_nmi(void);
    164 
    165 void *intr_establish(int, struct pic *, int, int, int, int (*)(void *), void *, bool);
    166 void intr_disestablish(struct intrhand *);
    167 const char *intr_string(int);
    168 void cpu_intr_init(struct cpu_info *);
    169 int xen_intr_map(int *, int);
    170 #ifdef INTRDEBUG
    171 void intr_printconfig(void);
    172 #endif
    173 int intr_find_mpmapping(int, int, struct xen_intr_handle *);
    174 struct pic *intr_findpic(int);
    175 void intr_add_pcibus(struct pcibus_attach_args *);
    176 
    177 #ifdef MULTIPROCESSOR
    178 void xen_ipi_init(void);
    179 int xen_send_ipi(struct cpu_info *, uint32_t);
    180 void xen_broadcast_ipi(uint32_t);
    181 #else
    182 #define xen_ipi_init(_1) ((void) 0) /* nothing */
    183 #define xen_send_ipi(_i1, _i2) (0) /* nothing */
    184 #define xen_broadcast_ipi(_i1) ((void) 0) /* nothing */
    185 #endif /* MULTIPROCESSOR */
    186 
    187 #endif /* !_LOCORE */
    188 
    189 #endif /* _XEN_INTR_H_ */
    190