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