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intr.h revision 1.26.2.3 
      1 /*	$NetBSD: intr.h,v 1.26.2.3 2009/08/19 18:46:53 yamt 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/cpu.h>
     43 #include <machine/pic.h>
     44 #include <sys/evcnt.h>
     45 
     46 #include "opt_xen.h"
     47 
     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 	char ev_evname[32];		/* event counter name */
     58 };
     59 
     60 /*
     61  * Structure describing an interrupt level. struct cpu_info has an array of
     62  * IPL_MAX of theses. The index in the array is equal to the stub number of
     63  * the stubcode as present in vector.s
     64  */
     65 
     66 struct intrstub {
     67 #if 0
     68 	void *ist_entry;
     69 #endif
     70 	void *ist_recurse;
     71 	void *ist_resume;
     72 };
     73 
     74 /* for x86 compatibility */
     75 extern struct intrstub i8259_stubs[];
     76 extern struct intrstub ioapic_edge_stubs[];
     77 extern struct intrstub ioapic_level_stubs[];
     78 
     79 struct iplsource {
     80 	struct intrhand *ipl_handlers;   /* handler chain */
     81 	void *ipl_recurse;               /* entry for spllower */
     82 	void *ipl_resume;                /* entry for doreti */
     83 	struct lwp *ipl_lwp;
     84 	u_long ipl_evt_mask1;	/* pending events for this IPL */
     85 	u_long ipl_evt_mask2[NR_EVENT_CHANNELS];
     86 };
     87 
     88 
     89 
     90 /*
     91  * Interrupt handler chains. These are linked in both the evtsource and
     92  * the iplsource.
     93  * The handler is called with its (single) argument.
     94  */
     95 
     96 struct intrhand {
     97 	int	(*ih_fun)(void *);
     98 	void	*ih_arg;
     99 	int	ih_level;
    100 	int	(*ih_realfun)(void *);
    101 	void	*ih_realarg;
    102 	struct	intrhand *ih_ipl_next;
    103 	struct	intrhand *ih_evt_next;
    104 	struct cpu_info *ih_cpu;
    105 };
    106 
    107 struct xen_intr_handle {
    108 	int pirq; /* also contains the  APIC_INT_* flags if NIOAPIC > 0 */
    109 	int evtch;
    110 };
    111 
    112 extern struct intrstub xenev_stubs[];
    113 
    114 #define IUNMASK(ci,level) (ci)->ci_iunmask[(level)]
    115 
    116 extern void Xspllower(int);
    117 
    118 int splraise(int);
    119 void spllower(int);
    120 
    121 #define SPL_ASSERT_BELOW(x) KDASSERT(curcpu()->ci_ilevel < (x))
    122 
    123 /*
    124  * Miscellaneous
    125  */
    126 #define	spl0()		spllower(IPL_NONE)
    127 #define	splx(x)		spllower(x)
    128 
    129 typedef uint8_t ipl_t;
    130 typedef struct {
    131 	ipl_t _ipl;
    132 } ipl_cookie_t;
    133 
    134 static inline ipl_cookie_t
    135 makeiplcookie(ipl_t ipl)
    136 {
    137 
    138 	return (ipl_cookie_t){._ipl = ipl};
    139 }
    140 
    141 static inline int
    142 splraiseipl(ipl_cookie_t icookie)
    143 {
    144 
    145 	return splraise(icookie._ipl);
    146 }
    147 
    148 #include <sys/spl.h>
    149 
    150 /*
    151  * Stub declarations.
    152  */
    153 
    154 struct cpu_info;
    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 void intr_calculatemasks(struct evtsource *);
    165 
    166 void *intr_establish(int, struct pic *, int, int, int, int (*)(void *), void *, bool);
    167 void intr_disestablish(struct intrhand *);
    168 const char *intr_string(int);
    169 void cpu_intr_init(struct cpu_info *);
    170 int xen_intr_map(int *, int);
    171 #ifdef INTRDEBUG
    172 void intr_printconfig(void);
    173 #endif
    174 int intr_find_mpmapping(int, int, struct xen_intr_handle *);
    175 struct pic *intr_findpic(int);
    176 void intr_add_pcibus(struct pcibus_attach_args *);
    177 
    178 int x86_send_ipi(struct cpu_info *, int);
    179 void x86_broadcast_ipi(int);
    180 void x86_multicast_ipi(int, int);
    181 
    182 #endif /* !_LOCORE */
    183 
    184 #endif /* _XEN_INTR_H_ */
    185