1 /* $NetBSD: intr.h,v 1.31 2009/07/29 12:02:06 cegger 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