MachIntrABI: Split vectorctl into intr_setup and intr_teardown
[dragonfly.git] / sys / platform / vkernel64 / platform / machintr.c
1 /*
2  * Copyright (c) 2006 The DragonFly Project.  All rights reserved.
3  *
4  * This code is derived from software contributed to The DragonFly Project
5  * by Matthew Dillon <dillon@backplane.com>
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  *
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in
15  *    the documentation and/or other materials provided with the
16  *    distribution.
17  * 3. Neither the name of The DragonFly Project nor the names of its
18  *    contributors may be used to endorse or promote products derived
19  *    from this software without specific, prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32  * SUCH DAMAGE.
33  *
34  * $DragonFly: src/sys/platform/vkernel/platform/machintr.c,v 1.17 2008/04/30 16:59:45 dillon Exp $
35  */
36
37 #include <sys/types.h>
38 #include <sys/systm.h>
39 #include <sys/kernel.h>
40 #include <sys/machintr.h>
41 #include <sys/errno.h>
42 #include <sys/mman.h>
43 #include <sys/globaldata.h>
44 #include <sys/interrupt.h>
45 #include <stdio.h>
46 #include <signal.h>
47 #include <machine/globaldata.h>
48 #include <machine/md_var.h>
49 #include <sys/thread2.h>
50
51 /*
52  * Interrupt Subsystem ABI
53  */
54
55 static void dummy_intrdis(int);
56 static void dummy_intren(int);
57 static void dummy_intr_setup(int, int);
58 static void dummy_intr_teardown(int);
59 static void dummy_finalize(void);
60 static void dummy_intrcleanup(void);
61 static void dummy_stabilize(void);
62
63 struct machintr_abi MachIntrABI = {
64         MACHINTR_GENERIC,
65         .intrdis =      dummy_intrdis,
66         .intren =       dummy_intren,
67         .intr_setup =   dummy_intr_setup,
68         .intr_teardown = dummy_intr_teardown,
69         .finalize =     dummy_finalize,
70         .cleanup =      dummy_intrcleanup,
71         .stabilize =    dummy_stabilize
72 };
73
74 static void
75 dummy_intrdis(int intr)
76 {
77 }
78
79 static void
80 dummy_intren(int intr)
81 {
82 }
83
84 static void
85 dummy_intr_setup(int intr, int flags)
86 {
87 }
88
89 static void
90 dummy_intr_teardown(int intr)
91 {
92 }
93
94 static void
95 dummy_finalize(void)
96 {
97 }
98
99 static void
100 dummy_intrcleanup(void)
101 {
102 }
103
104 static void
105 dummy_stabilize(void)
106 {
107 }
108
109 /*
110  * Process pending interrupts
111  */
112 void
113 splz(void)
114 {
115         struct mdglobaldata *gd = mdcpu;
116         thread_t td = gd->mi.gd_curthread;
117         int irq;
118
119         while (gd->mi.gd_reqflags & (RQF_IPIQ|RQF_INTPEND)) {
120                 crit_enter_quick(td);
121 #ifdef SMP
122                 if (gd->mi.gd_reqflags & RQF_IPIQ) {
123                         atomic_clear_int(&gd->mi.gd_reqflags, RQF_IPIQ);
124                         lwkt_process_ipiq();
125                 }
126 #endif
127                 if (gd->mi.gd_reqflags & RQF_INTPEND) {
128                         atomic_clear_int(&gd->mi.gd_reqflags, RQF_INTPEND);
129                         while ((irq = ffs(gd->gd_spending)) != 0) {
130                                 --irq;
131                                 atomic_clear_int(&gd->gd_spending, 1 << irq);
132                                 irq += FIRST_SOFTINT;
133                                 sched_ithd(irq);
134                         }
135                         while ((irq = ffs(gd->gd_fpending)) != 0) {
136                                 --irq;
137                                 atomic_clear_int(&gd->gd_fpending, 1 << irq);
138                                 sched_ithd(irq);
139                         }
140                 }
141                 crit_exit_noyield(td);
142         }
143 }
144
145 /*
146  * Allows an unprotected signal handler or mailbox to signal an interrupt
147  *
148  * For sched_ithd() to properly preempt via lwkt_schedule() we cannot
149  * enter a critical section here.  We use td_nest_count instead.
150  */
151 void
152 signalintr(int intr)
153 {
154         struct mdglobaldata *gd = mdcpu;
155         thread_t td = gd->mi.gd_curthread;
156
157         if (td->td_critcount || td->td_nest_count) {
158                 atomic_set_int_nonlocked(&gd->gd_fpending, 1 << intr);
159                 atomic_set_int(&gd->mi.gd_reqflags, RQF_INTPEND);
160         } else {
161                 ++td->td_nest_count;
162                 atomic_clear_int(&gd->gd_fpending, 1 << intr);
163                 sched_ithd(intr);
164                 --td->td_nest_count;
165         }
166 }
167
168 /*
169  * Must block any signal normally handled as maskable interrupt.
170  */
171 void
172 cpu_disable_intr(void)
173 {
174         sigblock(sigmask(SIGALRM)|sigmask(SIGIO)|sigmask(SIGUSR1));
175 }
176
177 void
178 cpu_enable_intr(void)
179 {
180         sigsetmask(0);
181 }
182
183 void
184 cpu_mask_all_signals(void)
185 {
186         sigblock(sigmask(SIGALRM)|sigmask(SIGIO)|sigmask(SIGQUIT)|
187                  sigmask(SIGUSR1)|sigmask(SIGTERM)|sigmask(SIGWINCH)|
188                  sigmask(SIGUSR2));
189 }
190
191 void
192 cpu_unmask_all_signals(void)
193 {
194         sigsetmask(0);
195 }
196
197 void
198 cpu_invlpg(void *addr)
199 {
200         madvise(addr, PAGE_SIZE, MADV_INVAL);
201 }
202
203 void
204 cpu_invltlb(void)
205 {
206         madvise((void *)KvaStart, KvaEnd - KvaStart, MADV_INVAL);
207 }