2 * SPDX-License-Identifier: BSD-4-Clause
4 * Copyright (c) 1996, 1997, 1998
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17 * This product includes software developed by HD Associates, Inc
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35 /* p1003_1b: Real Time common code.
38 #include <sys/cdefs.h>
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/syslog.h>
53 #include <sys/sysproto.h>
55 MALLOC_DEFINE(M_P31B, "p1003.1b", "Posix 1003.1B");
57 /* The system calls return ENOSYS if an entry is called that is not run-time
58 * supported. I am also logging since some programs start to use this when
59 * they shouldn't. That will be removed if annoying.
62 syscall_not_present(struct thread *td, const char *s, struct nosys_args *uap)
64 log(LOG_ERR, "cmd %s pid %d tried to use non-present %s\n",
65 td->td_name, td->td_proc->p_pid, s);
67 /* a " return nosys(p, uap); " here causes a core dump.
73 #if !defined(_KPOSIX_PRIORITY_SCHEDULING)
75 /* Not configured but loadable via a module:
84 SYSCALL_NOT_PRESENT_GEN(sched_setparam)
85 SYSCALL_NOT_PRESENT_GEN(sched_getparam)
86 SYSCALL_NOT_PRESENT_GEN(sched_setscheduler)
87 SYSCALL_NOT_PRESENT_GEN(sched_getscheduler)
88 SYSCALL_NOT_PRESENT_GEN(sched_yield)
89 SYSCALL_NOT_PRESENT_GEN(sched_get_priority_max)
90 SYSCALL_NOT_PRESENT_GEN(sched_get_priority_min)
91 SYSCALL_NOT_PRESENT_GEN(sched_rr_get_interval)
94 /* Configured in kernel version:
96 static struct ksched *ksched;
101 int ret = ksched_attach(&ksched);
104 p31b_setcfg(CTL_P1003_1B_PRIORITY_SCHEDULING, 200112L);
110 sys_sched_setparam(struct thread *td, struct sched_setparam_args *uap)
112 struct thread *targettd;
113 struct proc *targetp;
115 struct sched_param sched_param;
117 e = copyin(uap->param, &sched_param, sizeof(sched_param));
122 targetp = td->td_proc;
126 targetp = pfind(uap->pid);
129 targettd = FIRST_THREAD_IN_PROC(targetp);
132 e = kern_sched_setparam(td, targettd, &sched_param);
133 PROC_UNLOCK(targetp);
138 kern_sched_setparam(struct thread *td, struct thread *targettd,
139 struct sched_param *param)
141 struct proc *targetp;
144 targetp = targettd->td_proc;
145 PROC_LOCK_ASSERT(targetp, MA_OWNED);
147 error = p_cansched(td, targetp);
149 error = ksched_setparam(ksched, targettd,
150 (const struct sched_param *)param);
155 sys_sched_getparam(struct thread *td, struct sched_getparam_args *uap)
158 struct sched_param sched_param;
159 struct thread *targettd;
160 struct proc *targetp;
163 targetp = td->td_proc;
167 targetp = pfind(uap->pid);
168 if (targetp == NULL) {
171 targettd = FIRST_THREAD_IN_PROC(targetp);
174 e = kern_sched_getparam(td, targettd, &sched_param);
175 PROC_UNLOCK(targetp);
177 e = copyout(&sched_param, uap->param, sizeof(sched_param));
182 kern_sched_getparam(struct thread *td, struct thread *targettd,
183 struct sched_param *param)
185 struct proc *targetp;
188 targetp = targettd->td_proc;
189 PROC_LOCK_ASSERT(targetp, MA_OWNED);
191 error = p_cansee(td, targetp);
193 error = ksched_getparam(ksched, targettd, param);
198 sys_sched_setscheduler(struct thread *td, struct sched_setscheduler_args *uap)
201 struct sched_param sched_param;
202 struct thread *targettd;
203 struct proc *targetp;
205 e = copyin(uap->param, &sched_param, sizeof(sched_param));
210 targetp = td->td_proc;
214 targetp = pfind(uap->pid);
217 targettd = FIRST_THREAD_IN_PROC(targetp);
220 e = kern_sched_setscheduler(td, targettd, uap->policy,
222 PROC_UNLOCK(targetp);
227 kern_sched_setscheduler(struct thread *td, struct thread *targettd,
228 int policy, struct sched_param *param)
230 struct proc *targetp;
233 targetp = targettd->td_proc;
234 PROC_LOCK_ASSERT(targetp, MA_OWNED);
236 /* Don't allow non root user to set a scheduler policy. */
237 error = priv_check(td, PRIV_SCHED_SET);
241 error = p_cansched(td, targetp);
243 error = ksched_setscheduler(ksched, targettd, policy,
244 (const struct sched_param *)param);
249 sys_sched_getscheduler(struct thread *td, struct sched_getscheduler_args *uap)
252 struct thread *targettd;
253 struct proc *targetp;
256 targetp = td->td_proc;
260 targetp = pfind(uap->pid);
263 targettd = FIRST_THREAD_IN_PROC(targetp);
266 e = kern_sched_getscheduler(td, targettd, &policy);
267 PROC_UNLOCK(targetp);
269 td->td_retval[0] = policy;
275 kern_sched_getscheduler(struct thread *td, struct thread *targettd,
278 struct proc *targetp;
281 targetp = targettd->td_proc;
282 PROC_LOCK_ASSERT(targetp, MA_OWNED);
284 error = p_cansee(td, targetp);
286 error = ksched_getscheduler(ksched, targettd, policy);
291 sys_sched_yield(struct thread *td, struct sched_yield_args *uap)
294 sched_relinquish(td);
299 sys_sched_get_priority_max(struct thread *td,
300 struct sched_get_priority_max_args *uap)
304 error = ksched_get_priority_max(ksched, uap->policy, &prio);
305 td->td_retval[0] = prio;
310 sys_sched_get_priority_min(struct thread *td,
311 struct sched_get_priority_min_args *uap)
315 error = ksched_get_priority_min(ksched, uap->policy, &prio);
316 td->td_retval[0] = prio;
321 sys_sched_rr_get_interval(struct thread *td,
322 struct sched_rr_get_interval_args *uap)
324 struct timespec timespec;
327 error = kern_sched_rr_get_interval(td, uap->pid, ×pec);
329 error = copyout(×pec, uap->interval, sizeof(timespec));
334 kern_sched_rr_get_interval(struct thread *td, pid_t pid,
338 struct thread *targettd;
339 struct proc *targetp;
343 targetp = td->td_proc;
346 targetp = pfind(pid);
349 targettd = FIRST_THREAD_IN_PROC(targetp);
352 e = kern_sched_rr_get_interval_td(td, targettd, ts);
353 PROC_UNLOCK(targetp);
358 kern_sched_rr_get_interval_td(struct thread *td, struct thread *targettd,
364 p = targettd->td_proc;
365 PROC_LOCK_ASSERT(p, MA_OWNED);
367 error = p_cansee(td, p);
369 error = ksched_rr_get_interval(ksched, targettd, ts);
375 p31binit(void *notused)
377 (void) sched_attach();
378 p31b_setcfg(CTL_P1003_1B_PAGESIZE, PAGE_SIZE);
381 SYSINIT(p31b, SI_SUB_P1003_1B, SI_ORDER_FIRST, p31binit, NULL);