add APM powerhooks.

from NetBSD, Sat Jun 26 08:25:25 1999 UTC by augustss:

Add powerhooks, i.e., the ability to register a function that will be
called when the machine does a suspend or resume.
XXX Will go away when Jason's kevents come to life.

3 files changed, 112 insertions, 13 deletions

diff --git a/sys/arch/i386/i386/apm.c b/sys/arch/i386/i386/apm.c
index d1825fa5c8f..d3d18c79de7 100644
--- a/sys/arch/i386/i386/apm.c
+++ b/sys/arch/i386/i386/apm.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: apm.c,v 1.26 1999/02/28 05:53:13 deraadt Exp $	*/
+/*	$OpenBSD: apm.c,v 1.27 1999/11/07 17:39:15 provos Exp $	*/
 
 /*-
  * Copyright (c) 1995 John T. Kohl.  All rights reserved.
@@ -155,8 +155,9 @@ STATIC const char *apm_err_translate __P((int code));
 
 #define	apm_get_powstat(r) apmcall(APM_POWER_STATUS, APM_DEV_ALLDEVS, &r)
 #define	apm_get_event(r) apmcall(APM_GET_PM_EVENT, 0, &r)
-#define	apm_suspend() apm_set_powstate(APM_DEV_ALLDEVS, APM_SYS_SUSPEND)
-#define	apm_standby() apm_set_powstate(APM_DEV_ALLDEVS, APM_SYS_STANDBY)
+STATIC void	apm_standby __P((void));
+STATIC void	apm_suspend __P((void));
+STATIC void	apm_resume __P((struct apm_softc *, struct apmregs *));
 
 STATIC const char *
 apm_err_translate(code)
@@ -284,6 +285,32 @@ apm_power_print (sc, regs)
 #endif
 }
 
+STATIC void
+apm_suspend()
+{
+	dopowerhooks(PWR_SUSPEND);
+
+	(void)apm_set_powstate(APM_DEV_ALLDEVS, APM_SYS_SUSPEND);
+}
+
+STATIC void
+apm_standby()
+{
+	dopowerhooks(PWR_STANDBY);
+
+	(void)apm_set_powstate(APM_DEV_ALLDEVS, APM_SYS_STANDBY);
+}
+
+STATIC void
+apm_resume(sc, regs)
+	struct apm_softc *sc;
+	struct apmregs *regs;
+{
+	inittodr(time.tv_sec);
+	dopowerhooks(PWR_RESUME);
+	apm_record_event(sc, regs->bx);
+}
+
 /*
  * 	call the APM protected mode bios function FUNCTION for BIOS selection
  * 	WHICHBIOS.
@@ -411,23 +438,19 @@ apm_event_handle(sc, regs)
 		break;
 	case APM_NORMAL_RESUME:
 		DPRINTF(("system resumed\n"));
-		inittodr(time.tv_sec);
-		apm_record_event(sc, regs->bx);
+		apm_resume(sc, regs);
 		break;
 	case APM_CRIT_RESUME:
 		DPRINTF(("system resumed without us!\n"));
-		inittodr(time.tv_sec);
-		apm_record_event(sc, regs->bx);
+		apm_resume(sc, regs);
 		break;
 	case APM_SYS_STANDBY_RESUME:
 		DPRINTF(("system standby resume\n"));
-		inittodr(time.tv_sec);
-		apm_record_event(sc, regs->bx);
+		apm_resume(sc, regs);
 		break;
 	case APM_UPDATE_TIME:
 		DPRINTF(("update time, please\n"));
-		inittodr(time.tv_sec);
-		apm_record_event(sc, regs->bx);
+		apm_resume(sc, regs);
 		break;
 	case APM_CRIT_SUSPEND_REQ:
 		DPRINTF(("suspend required immediately\n"));
diff --git a/sys/kern/kern_subr.c b/sys/kern/kern_subr.c
index be226f857e8..4a6321e1896 100644
--- a/sys/kern/kern_subr.c
+++ b/sys/kern/kern_subr.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: kern_subr.c,v 1.9 1999/04/28 09:28:15 art Exp $	*/
+/*	$OpenBSD: kern_subr.c,v 1.10 1999/11/07 17:39:14 provos Exp $	*/
 /*	$NetBSD: kern_subr.c,v 1.15 1996/04/09 17:21:56 ragge Exp $	*/
 
 /*
@@ -249,3 +249,69 @@ doshutdownhooks()
 	    dp->sfd_list.le_next)
 		(*dp->sfd_fn)(dp->sfd_arg);
 }
+
+/*
+ * "Power hook" types, functions, and variables.
+ */
+
+struct powerhook_desc {
+	LIST_ENTRY(powerhook_desc) sfd_list;
+	void	(*sfd_fn) __P((int, void *));
+	void	*sfd_arg;
+};
+
+LIST_HEAD(, powerhook_desc) powerhook_list;
+
+void *
+powerhook_establish(fn, arg)
+	void (*fn) __P((int, void *));
+	void *arg;
+{
+	struct powerhook_desc *ndp;
+
+	ndp = (struct powerhook_desc *)
+	    malloc(sizeof(*ndp), M_DEVBUF, M_NOWAIT);
+	if (ndp == NULL)
+		return NULL;
+
+	ndp->sfd_fn = fn;
+	ndp->sfd_arg = arg;
+	LIST_INSERT_HEAD(&powerhook_list, ndp, sfd_list);
+
+	return (ndp);
+}
+
+void
+powerhook_disestablish(vhook)
+	void *vhook;
+{
+#ifdef DIAGNOSTIC
+	struct powerhook_desc *dp;
+
+	for (dp = powerhook_list.lh_first; dp != NULL;
+	    dp = dp->sfd_list.le_next)
+                if (dp == vhook)
+			break;
+	if (dp == NULL)
+		panic("powerhook_disestablish: hook not established");
+#endif
+
+	LIST_REMOVE((struct powerhook_desc *)vhook, sfd_list);
+	free(vhook, M_DEVBUF);
+}
+
+/*
+ * Run power hooks.
+ */
+void
+dopowerhooks(why)
+	int why;
+{
+	struct powerhook_desc *dp;
+
+	for (dp = LIST_FIRST(&powerhook_list); 
+	     dp != NULL; 
+	     dp = LIST_NEXT(dp, sfd_list)) {
+		(*dp->sfd_fn)(why, dp->sfd_arg);
+	}
+}
diff --git a/sys/sys/systm.h b/sys/sys/systm.h
index e9ac3597d82..c68a72ac109 100644
--- a/sys/sys/systm.h
+++ b/sys/sys/systm.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: systm.h,v 1.32 1999/09/12 19:44:04 weingart Exp $	*/
+/*	$OpenBSD: systm.h,v 1.33 1999/11/07 17:39:14 provos Exp $	*/
 /*	$NetBSD: systm.h,v 1.50 1996/06/09 04:55:09 briggs Exp $	*/
 
 /*-
@@ -236,6 +236,16 @@ void	*shutdownhook_establish __P((void (*)(void *), void *));
 void	shutdownhook_disestablish __P((void *));
 void	doshutdownhooks __P((void));
 
+/*
+ * Power managment hooks.
+ */
+void	*powerhook_establish __P((void (*)(int, void *), void *));
+void	powerhook_disestablish __P((void *));
+void	dopowerhooks __P((int));
+#define PWR_RESUME 0
+#define PWR_SUSPEND 1
+#define PWR_STANDBY 2
+
 struct uio;
 int	uiomove __P((caddr_t, int, struct uio *));