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.
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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
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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 * 6.3 : 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>
43 #include <sys/msgport.h>
44 #include <sys/taskqueue.h>
45 #include <machine/clock.h>
47 #include <sys/thread2.h>
48 #include <sys/msgport2.h>
49 #include <sys/mplock2.h>
53 #include <dev/acpica/acpivar.h>
55 #define _COMPONENT ACPI_OS_SERVICES
56 ACPI_MODULE_NAME("SCHEDULE")
59 * This is a little complicated due to the fact that we need to build and then
60 * free a 'struct task' for each task we enqueue.
63 MALLOC_DEFINE(M_ACPITASK, "acpitask", "ACPI deferred task");
65 static void acpi_task_thread(void *arg);
66 static void acpi_autofree_reply(lwkt_port_t port, lwkt_msg_t msg);
69 struct lwkt_msg at_msg;
70 ACPI_OSD_EXEC_CALLBACK at_function;
72 ACPI_EXECUTE_TYPE at_type;
75 static struct thread *acpi_task_td;
76 struct lwkt_port acpi_afree_rport;
79 * Initialize the ACPI helper thread.
82 acpi_task_thread_init(void)
84 lwkt_initport_replyonly(&acpi_afree_rport, acpi_autofree_reply);
85 acpi_task_td = kmalloc(sizeof(struct thread), M_DEVBUF, M_INTWAIT | M_ZERO);
86 lwkt_create(acpi_task_thread, NULL, NULL, acpi_task_td, TDF_NOSTART, 0,
92 acpi_task_thread_schedule(void)
94 lwkt_schedule(acpi_task_td);
98 * The ACPI helper thread processes OSD execution callback messages.
101 acpi_task_thread(void *arg)
103 ACPI_OSD_EXEC_CALLBACK func;
104 struct acpi_task *at;
108 at = (void *)lwkt_waitport(&curthread->td_msgport, 0);
109 func = at->at_function;
110 func(at->at_context);
111 lwkt_replymsg(&at->at_msg, 0);
117 * Queue an ACPI message for execution by allocating a LWKT message structure
118 * and sending the message to the helper thread. The reply port is setup
119 * to automatically free the message.
122 AcpiOsExecute(ACPI_EXECUTE_TYPE Type, ACPI_OSD_EXEC_CALLBACK Function,
125 struct acpi_task *at;
128 case OSL_GLOBAL_LOCK_HANDLER:
129 case OSL_NOTIFY_HANDLER:
130 case OSL_GPE_HANDLER:
131 case OSL_DEBUGGER_THREAD:
132 case OSL_EC_POLL_HANDLER:
133 case OSL_EC_BURST_HANDLER:
136 return_ACPI_STATUS (AE_BAD_PARAMETER);
139 /* Note: Interrupt Context */
140 at = kmalloc(sizeof(*at), M_ACPITASK, M_INTWAIT | M_ZERO);
141 lwkt_initmsg(&at->at_msg, &acpi_afree_rport, 0);
142 at->at_function = Function;
143 at->at_context = Context;
145 lwkt_sendmsg(&acpi_task_td->td_msgport, &at->at_msg);
146 return_ACPI_STATUS (AE_OK);
150 * The message's reply port just frees the message.
153 acpi_autofree_reply(lwkt_port_t port, lwkt_msg_t msg)
155 kfree(msg, M_ACPITASK);
159 AcpiOsGetTimer (void)
165 /* Seconds * 10^7 = 100ns(10^-7), Microseconds(10^-6) * 10^1 = 100ns */
167 return (((UINT64) time.tv_sec * 10000000) + ((UINT64) time.tv_usec * 10));
171 AcpiOsSleep(UINT64 Milliseconds)
176 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
178 timo = Milliseconds * hz / 1000;
181 * If requested sleep time is less than our hz resolution, or if
182 * the system is in early boot before the system tick is operational,
183 * use DELAY instead for better granularity.
185 if (clocks_running == 0) {
186 while (timo > 1000000) {
192 } else if (timo > 0) {
193 tsleep(&dummy, 0, "acpislp", timo);
195 DELAY(Milliseconds * 1000);
201 AcpiOsStall(UINT32 Microseconds)
203 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
210 AcpiOsGetThreadId(void)
214 /* XXX do not add ACPI_FUNCTION_TRACE here, results in recursive call. */
219 KASSERT(p != NULL, ("%s: curproc is NULL!", __func__));
221 /* Returning 0 is not allowed. */
222 return (p->p_pid + 1);