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 $
28 * $DragonFly: src/sys/dev/acpica5/Osd/OsdSchedule.c,v 1.9 2007/05/24 05:51:28 dillon Exp $
32 * 6.3 : Scheduling services
36 #include <sys/param.h>
37 #include <sys/systm.h>
39 #include <sys/interrupt.h>
40 #include <sys/kernel.h>
41 #include <sys/kthread.h>
42 #include <sys/malloc.h>
44 #include <sys/msgport.h>
45 #include <sys/taskqueue.h>
46 #include <machine/clock.h>
48 #include <sys/thread2.h>
49 #include <sys/msgport2.h>
52 #include <dev/acpica5/acpivar.h>
54 #define _COMPONENT ACPI_OS_SERVICES
55 ACPI_MODULE_NAME("SCHEDULE")
58 * This is a little complicated due to the fact that we need to build and then
59 * free a 'struct task' for each task we enqueue.
62 MALLOC_DEFINE(M_ACPITASK
, "acpitask", "ACPI deferred task");
64 static void acpi_task_thread(void *arg
);
65 static void acpi_autofree_reply(lwkt_port_t port
, lwkt_msg_t msg
);
68 struct lwkt_msg at_msg
;
69 ACPI_OSD_EXEC_CALLBACK at_function
;
71 ACPI_EXECUTE_TYPE at_type
;
74 static struct thread
*acpi_task_td
;
75 struct lwkt_port acpi_afree_rport
;
78 * Initialize the ACPI helper thread.
81 acpi_task_thread_init(void)
83 lwkt_initport_replyonly(&acpi_afree_rport
, acpi_autofree_reply
);
84 kthread_create(acpi_task_thread
, NULL
, &acpi_task_td
,
90 * The ACPI helper thread processes OSD execution callback messages.
93 acpi_task_thread(void *arg
)
95 ACPI_OSD_EXEC_CALLBACK func
;
99 at
= (void *)lwkt_waitport(&curthread
->td_msgport
, NULL
);
100 func
= (ACPI_OSD_EXEC_CALLBACK
)at
->at_function
;
101 func((void *)at
->at_context
);
102 lwkt_replymsg(&at
->at_msg
, 0);
108 * Queue an ACPI message for execution by allocating a LWKT message structure
109 * and sending the message to the helper thread. The reply port is setup
110 * to automatically free the message.
113 AcpiOsExecute(ACPI_EXECUTE_TYPE Type
, ACPI_OSD_EXEC_CALLBACK Function
,
116 struct acpi_task
*at
;
119 case OSL_GLOBAL_LOCK_HANDLER
:
120 case OSL_NOTIFY_HANDLER
:
121 case OSL_GPE_HANDLER
:
122 case OSL_DEBUGGER_THREAD
:
123 case OSL_EC_POLL_HANDLER
:
124 case OSL_EC_BURST_HANDLER
:
127 return_ACPI_STATUS (AE_BAD_PARAMETER
);
130 /* Note: Interrupt Context */
131 at
= kmalloc(sizeof(*at
), M_ACPITASK
, M_INTWAIT
| M_ZERO
);
132 lwkt_initmsg(&at
->at_msg
, &acpi_afree_rport
, 0);
133 at
->at_function
= Function
;
134 at
->at_context
= Context
;
136 lwkt_sendmsg(&acpi_task_td
->td_msgport
, &at
->at_msg
);
137 return_ACPI_STATUS (AE_OK
);
141 * The message's reply port just frees the message.
144 acpi_autofree_reply(lwkt_port_t port
, lwkt_msg_t msg
)
146 kfree(msg
, M_ACPITASK
);
150 AcpiOsGetTimer (void)
156 /* Seconds * 10^7 = 100ns(10^-7), Microseconds(10^-6) * 10^1 = 100ns */
158 return (((UINT64
) time
.tv_sec
* 10000000) + ((UINT64
) time
.tv_usec
* 10));
162 AcpiOsSleep(ACPI_INTEGER Milliseconds
)
167 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__
);
169 timo
= Milliseconds
* hz
/ 1000;
172 * If requested sleep time is less than our hz resolution, or if
173 * the system is in early boot before the system tick is operational,
174 * use DELAY instead for better granularity.
176 if (clocks_running
== 0) {
177 while (timo
> 1000000) {
183 } else if (timo
> 1000) {
184 tsleep(&dummy
, 0, "acpislp", timo
);
186 DELAY(Milliseconds
* 1000);
192 AcpiOsStall(UINT32 Microseconds
)
194 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__
);
201 AcpiOsGetThreadId(void)
205 /* XXX do not add ACPI_FUNCTION_TRACE here, results in recursive call. */
210 KASSERT(p
!= NULL
, ("%s: curproc is NULL!", __func__
));
212 /* Returning 0 is not allowed. */
213 return (p
->p_pid
+ 1);