1 /* $NetBSD: intr.h,v 1.29 2008/05/30 19:03:10 ad 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 45 #include "opt_xen.h" 46 47 /* 48 * Struct describing an event channel. 49 */ 50 51 struct evtsource { 52 int ev_maxlevel; /* max. IPL for this source */ 53 uint32_t ev_imask; /* interrupt mask */ 54 struct intrhand *ev_handlers; /* handler chain */ 55 struct evcnt ev_evcnt; /* interrupt counter */ 56 char ev_evname[32]; /* event counter name */ 57 }; 58 59 /* 60 * Structure describing an interrupt level. struct cpu_info has an array of 61 * IPL_MAX of theses. The index in the array is equal to the stub number of 62 * the stubcode as present in vector.s 63 */ 64 65 struct intrstub { 66 #if 0 67 void *ist_entry; 68 #endif 69 void *ist_recurse; 70 void *ist_resume; 71 }; 72 73 #ifdef XEN3 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 #endif 79 80 struct iplsource { 81 struct intrhand *ipl_handlers; /* handler chain */ 82 void *ipl_recurse; /* entry for spllower */ 83 void *ipl_resume; /* entry for doreti */ 84 struct lwp *ipl_lwp; 85 u_long ipl_evt_mask1; /* pending events for this IPL */ 86 u_long ipl_evt_mask2[NR_EVENT_CHANNELS]; 87 }; 88 89 90 91 /* 92 * Interrupt handler chains. These are linked in both the evtsource and 93 * the iplsource. 94 * The handler is called with its (single) argument. 95 */ 96 97 struct intrhand { 98 int (*ih_fun)(void *); 99 void *ih_arg; 100 int ih_level; 101 int (*ih_realfun)(void *); 102 void *ih_realarg; 103 struct intrhand *ih_ipl_next; 104 struct intrhand *ih_evt_next; 105 struct cpu_info *ih_cpu; 106 }; 107 108 struct xen_intr_handle { 109 int pirq; /* also contains the APIC_INT_* flags if NIOAPIC > 0 */ 110 int evtch; 111 }; 112 113 extern struct intrstub xenev_stubs[]; 114 115 #define IUNMASK(ci,level) (ci)->ci_iunmask[(level)] 116 117 extern void Xspllower(int); 118 119 int splraise(int); 120 void spllower(int); 121 122 #define SPL_ASSERT_BELOW(x) KDASSERT(curcpu()->ci_ilevel < (x)) 123 124 /* 125 * Miscellaneous 126 */ 127 #define spl0() spllower(IPL_NONE) 128 #define splx(x) spllower(x) 129 130 typedef uint8_t ipl_t; 131 typedef struct { 132 ipl_t _ipl; 133 } ipl_cookie_t; 134 135 static inline ipl_cookie_t 136 makeiplcookie(ipl_t ipl) 137 { 138 139 return (ipl_cookie_t){._ipl = ipl}; 140 } 141 142 static inline int 143 splraiseipl(ipl_cookie_t icookie) 144 { 145 146 return splraise(icookie._ipl); 147 } 148 149 #include <sys/spl.h> 150 151 /* 152 * Stub declarations. 153 */ 154 155 struct cpu_info; 156 157 struct pcibus_attach_args; 158 159 #ifdef MULTIPROCESSOR 160 int intr_biglock_wrapper(void *); 161 #endif 162 163 void intr_default_setup(void); 164 int x86_nmi(void); 165 void intr_calculatemasks(struct evtsource *); 166 167 void *intr_establish(int, struct pic *, int, int, int, int (*)(void *), void *, bool); 168 void intr_disestablish(struct intrhand *); 169 const char *intr_string(int); 170 void cpu_intr_init(struct cpu_info *); 171 int xen_intr_map(int *, int); 172 #ifdef INTRDEBUG 173 void intr_printconfig(void); 174 #endif 175 int intr_find_mpmapping(int, int, struct xen_intr_handle *); 176 struct pic *intr_findpic(int); 177 void intr_add_pcibus(struct pcibus_attach_args *); 178 179 int x86_send_ipi(struct cpu_info *, int); 180 void x86_broadcast_ipi(int); 181 void x86_multicast_ipi(int, int); 182 183 #endif /* !_LOCORE */ 184 185 #endif /* _XEN_INTR_H_ */ 186