2 * Copyright (c) 2000 Michael Smith
3 * Copyright (c) 2000 BSDi
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * $FreeBSD: src/sys/dev/acpica/Osd/OsdSchedule.c,v 1.28 2004/05/06 02:18:58 njl Exp $
31 * Multithreading and Scheduling Services
35 #include <sys/param.h>
36 #include <sys/systm.h>
38 #include <sys/interrupt.h>
39 #include <sys/kernel.h>
40 #include <sys/kthread.h>
41 #include <sys/malloc.h>
42 #include <sys/msgport.h>
43 #include <sys/taskqueue.h>
44 #include <machine/clock.h>
46 #include <sys/msgport2.h>
50 #include <dev/acpica/acpivar.h>
52 #define _COMPONENT ACPI_OS_SERVICES
53 ACPI_MODULE_NAME("SCHEDULE")
56 * This is a little complicated due to the fact that we need to build and then
57 * free a 'struct task' for each task we enqueue.
60 MALLOC_DEFINE(M_ACPITASK, "acpitask", "ACPI deferred task");
62 static void acpi_task_thread(void *arg);
63 static void acpi_autofree_reply(lwkt_port_t port, lwkt_msg_t msg);
66 struct lwkt_msg at_msg;
67 ACPI_OSD_EXEC_CALLBACK at_function;
69 ACPI_EXECUTE_TYPE at_type;
72 static struct thread *acpi_task_td;
73 struct lwkt_port acpi_afree_rport;
76 * Initialize the ACPI helper thread.
79 acpi_task_thread_init(void)
81 lwkt_initport_replyonly(&acpi_afree_rport, acpi_autofree_reply);
82 acpi_task_td = kmalloc(sizeof(struct thread), M_DEVBUF, M_INTWAIT | M_ZERO);
83 lwkt_create(acpi_task_thread, NULL, NULL, acpi_task_td, TDF_NOSTART, 0,
89 acpi_task_thread_schedule(void)
91 lwkt_schedule(acpi_task_td);
95 * The ACPI helper thread processes OSD execution callback messages.
98 acpi_task_thread(void *arg)
100 ACPI_OSD_EXEC_CALLBACK func;
101 struct acpi_task *at;
103 lwkt_gettoken(&acpi_token);
105 at = (void *)lwkt_waitport(&curthread->td_msgport, 0);
106 func = at->at_function;
107 func(at->at_context);
108 lwkt_replymsg(&at->at_msg, 0);
110 lwkt_reltoken(&acpi_token);
114 * Queue an ACPI message for execution by allocating a LWKT message structure
115 * and sending the message to the helper thread. The reply port is setup
116 * to automatically free the message.
119 AcpiOsExecute(ACPI_EXECUTE_TYPE Type, ACPI_OSD_EXEC_CALLBACK Function,
122 struct acpi_task *at;
125 case OSL_GLOBAL_LOCK_HANDLER:
126 case OSL_NOTIFY_HANDLER:
127 case OSL_GPE_HANDLER:
128 case OSL_DEBUGGER_EXEC_THREAD:
129 case OSL_EC_POLL_HANDLER:
130 case OSL_EC_BURST_HANDLER:
133 return_ACPI_STATUS (AE_BAD_PARAMETER);
136 /* Note: Interrupt Context */
137 at = kmalloc(sizeof(*at), M_ACPITASK, M_INTWAIT | M_ZERO);
138 lwkt_initmsg(&at->at_msg, &acpi_afree_rport, 0);
139 at->at_function = Function;
140 at->at_context = Context;
142 lwkt_sendmsg(&acpi_task_td->td_msgport, &at->at_msg);
143 return_ACPI_STATUS (AE_OK);
147 * The message's reply port just frees the message.
150 acpi_autofree_reply(lwkt_port_t port, lwkt_msg_t msg)
152 kfree(msg, M_ACPITASK);
156 AcpiOsGetTimer (void)
162 /* Seconds * 10^7 = 100ns(10^-7), Microseconds(10^-6) * 10^1 = 100ns */
164 return (((UINT64) time.tv_sec * 10000000) + ((UINT64) time.tv_usec * 10));
168 AcpiOsSleep(UINT64 Milliseconds)
173 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
175 timo = Milliseconds * hz / 1000;
178 * If requested sleep time is less than our hz resolution, or if
179 * the system is in early boot before the system tick is operational,
180 * use DELAY instead for better granularity.
182 if (clocks_running == 0) {
183 while (timo > 1000000) {
189 } else if (timo > 0) {
190 tsleep(&dummy, 0, "acpislp", timo);
192 DELAY(Milliseconds * 1000);
198 AcpiOsStall(UINT32 Microseconds)
200 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
207 AcpiOsGetThreadId(void)
209 /* XXX do not add ACPI_FUNCTION_TRACE here, results in recursive call. */
211 return ((uintptr_t)curthread);