2 * Copyright (c) 1996, 1997, 1998
3 * HD Associates, Inc. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by HD Associates, Inc
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL HD ASSOCIATES OR CONTRIBUTORS BE LIABLE
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25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 /* p1003_1b: Real Time common code.
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
39 #include "opt_posix.h"
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/kernel.h>
45 #include <sys/module.h>
46 #include <sys/mutex.h>
49 #include <sys/posix4.h>
50 #include <sys/syscallsubr.h>
51 #include <sys/sysctl.h>
52 #include <sys/sysent.h>
53 #include <sys/syslog.h>
54 #include <sys/sysproto.h>
56 MALLOC_DEFINE(M_P31B, "p1003.1b", "Posix 1003.1B");
58 /* The system calls return ENOSYS if an entry is called that is not run-time
59 * supported. I am also logging since some programs start to use this when
60 * they shouldn't. That will be removed if annoying.
63 syscall_not_present(struct thread *td, const char *s, struct nosys_args *uap)
65 log(LOG_ERR, "cmd %s pid %d tried to use non-present %s\n",
66 td->td_name, td->td_proc->p_pid, s);
68 /* a " return nosys(p, uap); " here causes a core dump.
74 #if !defined(_KPOSIX_PRIORITY_SCHEDULING)
76 /* Not configured but loadable via a module:
85 SYSCALL_NOT_PRESENT_GEN(sched_setparam)
86 SYSCALL_NOT_PRESENT_GEN(sched_getparam)
87 SYSCALL_NOT_PRESENT_GEN(sched_setscheduler)
88 SYSCALL_NOT_PRESENT_GEN(sched_getscheduler)
89 SYSCALL_NOT_PRESENT_GEN(sched_yield)
90 SYSCALL_NOT_PRESENT_GEN(sched_get_priority_max)
91 SYSCALL_NOT_PRESENT_GEN(sched_get_priority_min)
92 SYSCALL_NOT_PRESENT_GEN(sched_rr_get_interval)
95 /* Configured in kernel version:
97 static struct ksched *ksched;
102 int ret = ksched_attach(&ksched);
105 p31b_setcfg(CTL_P1003_1B_PRIORITY_SCHEDULING, 200112L);
111 sched_setparam(struct thread *td, struct sched_setparam_args *uap)
113 struct thread *targettd;
114 struct proc *targetp;
116 struct sched_param sched_param;
118 e = copyin(uap->param, &sched_param, sizeof(sched_param));
123 targetp = td->td_proc;
127 targetp = pfind(uap->pid);
130 targettd = FIRST_THREAD_IN_PROC(targetp);
133 e = p_cansched(td, targetp);
135 e = ksched_setparam(ksched, targettd,
136 (const struct sched_param *)&sched_param);
138 PROC_UNLOCK(targetp);
143 sched_getparam(struct thread *td, struct sched_getparam_args *uap)
146 struct sched_param sched_param;
147 struct thread *targettd;
148 struct proc *targetp;
151 targetp = td->td_proc;
155 targetp = pfind(uap->pid);
156 if (targetp == NULL) {
159 targettd = FIRST_THREAD_IN_PROC(targetp);
162 e = p_cansee(td, targetp);
164 e = ksched_getparam(ksched, targettd, &sched_param);
166 PROC_UNLOCK(targetp);
168 e = copyout(&sched_param, uap->param, sizeof(sched_param));
173 sched_setscheduler(struct thread *td, struct sched_setscheduler_args *uap)
176 struct sched_param sched_param;
177 struct thread *targettd;
178 struct proc *targetp;
180 /* Don't allow non root user to set a scheduler policy. */
181 e = priv_check(td, PRIV_SCHED_SET);
185 e = copyin(uap->param, &sched_param, sizeof(sched_param));
190 targetp = td->td_proc;
194 targetp = pfind(uap->pid);
197 targettd = FIRST_THREAD_IN_PROC(targetp);
200 e = p_cansched(td, targetp);
202 e = ksched_setscheduler(ksched, targettd,
203 uap->policy, (const struct sched_param *)&sched_param);
205 PROC_UNLOCK(targetp);
210 sched_getscheduler(struct thread *td, struct sched_getscheduler_args *uap)
213 struct thread *targettd;
214 struct proc *targetp;
217 targetp = td->td_proc;
221 targetp = pfind(uap->pid);
224 targettd = FIRST_THREAD_IN_PROC(targetp);
227 e = p_cansee(td, targetp);
229 e = ksched_getscheduler(ksched, targettd, &policy);
230 td->td_retval[0] = policy;
232 PROC_UNLOCK(targetp);
238 sched_yield(struct thread *td, struct sched_yield_args *uap)
241 sched_relinquish(curthread);
246 sched_get_priority_max(struct thread *td,
247 struct sched_get_priority_max_args *uap)
251 error = ksched_get_priority_max(ksched, uap->policy, &prio);
252 td->td_retval[0] = prio;
257 sched_get_priority_min(struct thread *td,
258 struct sched_get_priority_min_args *uap)
262 error = ksched_get_priority_min(ksched, uap->policy, &prio);
263 td->td_retval[0] = prio;
268 sched_rr_get_interval(struct thread *td,
269 struct sched_rr_get_interval_args *uap)
271 struct timespec timespec;
274 error = kern_sched_rr_get_interval(td, uap->pid, ×pec);
276 error = copyout(×pec, uap->interval, sizeof(timespec));
281 kern_sched_rr_get_interval(struct thread *td, pid_t pid,
285 struct thread *targettd;
286 struct proc *targetp;
290 targetp = td->td_proc;
293 targetp = pfind(pid);
296 targettd = FIRST_THREAD_IN_PROC(targetp);
299 e = p_cansee(td, targetp);
301 e = ksched_rr_get_interval(ksched, targettd, ts);
302 PROC_UNLOCK(targetp);
309 p31binit(void *notused)
311 (void) sched_attach();
312 p31b_setcfg(CTL_P1003_1B_PAGESIZE, PAGE_SIZE);
315 SYSINIT(p31b, SI_SUB_P1003_1B, SI_ORDER_FIRST, p31binit, NULL);