sys/arch/xen/include/intr.h

   1 /*      $NetBSD: intr.h,v 1.30 2009/03/27 15:47:33 dyoung 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_ */