MachIntrABI: Field rename; no functional changes
[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_intr_disable(int);
56 static void dummy_intr_enable(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         .intr_disable = dummy_intr_disable,
66         .intr_enable =  dummy_intr_enable,
67         .intr_setup =   dummy_intr_setup,
68         .intr_teardown = dummy_intr_teardown,
69
70         .finalize =     dummy_finalize,
71         .cleanup =      dummy_intrcleanup,
72         .stabilize =    dummy_stabilize
73 };
74
75 static void
76 dummy_intr_disable(int intr)
77 {
78 }
79
80 static void
81 dummy_intr_enable(int intr)
82 {
83 }
84
85 static void
86 dummy_intr_setup(int intr, int flags)
87 {
88 }
89
90 static void
91 dummy_intr_teardown(int intr)
92 {
93 }
94
95 static void
96 dummy_finalize(void)
97 {
98 }
99
100 static void
101 dummy_intrcleanup(void)
102 {
103 }
104
105 static void
106 dummy_stabilize(void)
107 {
108 }
109
110 /*
111  * Process pending interrupts
112  */
113 void
114 splz(void)
115 {
116         struct mdglobaldata *gd = mdcpu;
117         thread_t td = gd->mi.gd_curthread;
118         int irq;
119
120         while (gd->mi.gd_reqflags & (RQF_IPIQ|RQF_INTPEND)) {
121                 crit_enter_quick(td);
122 #ifdef SMP
123                 if (gd->mi.gd_reqflags & RQF_IPIQ) {
124                         atomic_clear_int(&gd->mi.gd_reqflags, RQF_IPIQ);
125                         lwkt_process_ipiq();
126                 }
127 #endif
128                 if (gd->mi.gd_reqflags & RQF_INTPEND) {
129                         atomic_clear_int(&gd->mi.gd_reqflags, RQF_INTPEND);
130                         while ((irq = ffs(gd->gd_spending)) != 0) {
131                                 --irq;
132                                 atomic_clear_int(&gd->gd_spending, 1 << irq);
133                                 irq += FIRST_SOFTINT;
134                                 sched_ithd(irq);
135                         }
136                         while ((irq = ffs(gd->gd_fpending)) != 0) {
137                                 --irq;
138                                 atomic_clear_int(&gd->gd_fpending, 1 << irq);
139                                 sched_ithd(irq);
140                         }
141                 }
142                 crit_exit_noyield(td);
143         }
144 }
145
146 /*
147  * Allows an unprotected signal handler or mailbox to signal an interrupt
148  *
149  * For sched_ithd() to properly preempt via lwkt_schedule() we cannot
150  * enter a critical section here.  We use td_nest_count instead.
151  */
152 void
153 signalintr(int intr)
154 {
155         struct mdglobaldata *gd = mdcpu;
156         thread_t td = gd->mi.gd_curthread;
157
158         if (td->td_critcount || td->td_nest_count) {
159                 atomic_set_int_nonlocked(&gd->gd_fpending, 1 << intr);
160                 atomic_set_int(&gd->mi.gd_reqflags, RQF_INTPEND);
161         } else {
162                 ++td->td_nest_count;
163                 atomic_clear_int(&gd->gd_fpending, 1 << intr);
164                 sched_ithd(intr);
165                 --td->td_nest_count;
166         }
167 }
168
169 /*
170  * Must block any signal normally handled as maskable interrupt.
171  */
172 void
173 cpu_disable_intr(void)
174 {
175         sigblock(sigmask(SIGALRM)|sigmask(SIGIO)|sigmask(SIGUSR1));
176 }
177
178 void
179 cpu_enable_intr(void)
180 {
181         sigsetmask(0);
182 }
183
184 void
185 cpu_mask_all_signals(void)
186 {
187         sigblock(sigmask(SIGALRM)|sigmask(SIGIO)|sigmask(SIGQUIT)|
188                  sigmask(SIGUSR1)|sigmask(SIGTERM)|sigmask(SIGWINCH)|
189                  sigmask(SIGUSR2));
190 }
191
192 void
193 cpu_unmask_all_signals(void)
194 {
195         sigsetmask(0);
196 }
197
198 void
199 cpu_invlpg(void *addr)
200 {
201         madvise(addr, PAGE_SIZE, MADV_INVAL);
202 }
203
204 void
205 cpu_invltlb(void)
206 {
207         madvise((void *)KvaStart, KvaEnd - KvaStart, MADV_INVAL);
208 }