Added pc98 apm driver.

Submitted by:	MURAMATSU Atsushi <amura@ma3.seikyou.ne.jp>

3 files changed, 1572 insertions, 0 deletions

diff --git a/sys/pc98/apm/apm.c b/sys/pc98/apm/apm.c
new file mode 100644
index 0000000..1184c1b
--- /dev/null
+++ b/sys/pc98/apm/apm.c
@@ -0,0 +1,1434 @@
+/*
+ * APM (Advanced Power Management) BIOS Device Driver
+ *
+ * Copyright (c) 1994 UKAI, Fumitoshi.
+ * Copyright (c) 1994-1995 by HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org>
+ * Copyright (c) 1996 Nate Williams <nate@FreeBSD.org>
+ * Copyright (c) 1997 Poul-Henning Kamp <phk@FreeBSD.org>
+ *
+ * This software may be used, modified, copied, and distributed, in
+ * both source and binary form provided that the above copyright and
+ * these terms are retained. Under no circumstances is the author
+ * responsible for the proper functioning of this software, nor does
+ * the author assume any responsibility for damages incurred with its
+ * use.
+ *
+ * Sep, 1994	Implemented on FreeBSD 1.1.5.1R (Toshiba AVS001WD)
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/eventhandler.h>
+#include <sys/conf.h>
+#include <sys/kernel.h>
+#include <sys/time.h>
+#include <sys/reboot.h>
+#include <sys/bus.h>
+#include <sys/selinfo.h>
+#include <sys/poll.h>
+#include <sys/fcntl.h>
+#include <sys/uio.h>
+#include <sys/signalvar.h>
+#include <sys/sysctl.h>
+#include <machine/apm_bios.h>
+#include <machine/segments.h>
+#include <machine/clock.h>
+#include <vm/vm.h>
+#include <vm/vm_param.h>
+#include <vm/pmap.h>
+#include <sys/syslog.h>
+
+#include <machine/pc/bios.h>
+#include <machine/vm86.h>
+#ifdef PC98
+#include <machine/bus.h>
+#include <machine/resource.h>
+#include <sys/rman.h>
+#endif
+
+#include <pc98/apm/apm.h>
+
+/* Used by the apm_saver screen saver module */
+int apm_display __P((int newstate));
+struct apm_softc apm_softc;
+
+static void apm_resume __P((void));
+static int apm_bioscall(void);
+static int apm_check_function_supported __P((u_int version, u_int func));
+
+static u_long	apm_version;
+
+int	apm_evindex;
+
+#define	SCFLAG_ONORMAL	0x0000001
+#define	SCFLAG_OCTL	0x0000002
+#define	SCFLAG_OPEN	(SCFLAG_ONORMAL|SCFLAG_OCTL)
+
+#define APMDEV(dev)	(minor(dev)&0x0f)
+#define APMDEV_NORMAL	0
+#define APMDEV_CTL	8
+
+#ifdef PC98
+extern int bios32_apm98 __P((struct bios_regs *, u_int, u_short));
+
+/* PC98's SMM definition */
+#define	APM_NECSMM_PORT		0x6b8e
+#define	APM_NECSMM_PORTSZ	1
+#define	APM_NECSMM_EN		0x10
+static __inline void apm_enable_smm __P((struct apm_softc *));
+static __inline void apm_disable_smm __P((struct apm_softc *));
+int apm_necsmm_addr;
+u_int32_t apm_necsmm_mask;
+#endif
+
+static struct apmhook	*hook[NAPM_HOOK];		/* XXX */
+
+#define is_enabled(foo) ((foo) ? "enabled" : "disabled")
+
+/* Map version number to integer (keeps ordering of version numbers) */
+#define INTVERSION(major, minor)	((major)*100 + (minor))
+
+static struct callout_handle apm_timeout_ch = 
+    CALLOUT_HANDLE_INITIALIZER(&apm_timeout_ch);
+
+static timeout_t apm_timeout;
+static d_open_t apmopen;
+static d_close_t apmclose;
+static d_write_t apmwrite;
+static d_ioctl_t apmioctl;
+static d_poll_t apmpoll;
+
+#define CDEV_MAJOR 39
+static struct cdevsw apm_cdevsw = {
+	/* open */	apmopen,
+	/* close */	apmclose,
+	/* read */	noread,
+	/* write */	apmwrite,
+	/* ioctl */	apmioctl,
+	/* poll */	apmpoll,
+	/* mmap */	nommap,
+	/* strategy */	nostrategy,
+	/* name */	"apm",
+	/* maj */	CDEV_MAJOR,
+	/* dump */	nodump,
+	/* psize */	nopsize,
+	/* flags */	0,
+	/* bmaj */	-1
+};
+
+static int apm_suspend_delay = 1;
+static int apm_standby_delay = 1;
+static int apm_debug = 0;
+
+#define APM_DPRINT(args...) do	{					\
+	if (apm_debug) {						\
+		printf(args);						\
+	}								\
+} while (0)
+
+SYSCTL_INT(_machdep, OID_AUTO, apm_suspend_delay, CTLFLAG_RW, &apm_suspend_delay, 1, "");
+SYSCTL_INT(_machdep, OID_AUTO, apm_standby_delay, CTLFLAG_RW, &apm_standby_delay, 1, "");
+SYSCTL_INT(_debug, OID_AUTO, apm_debug, CTLFLAG_RW, &apm_debug, 0, "");
+
+#ifdef PC98
+static __inline void
+apm_enable_smm(sc)
+	struct apm_softc *sc;
+{
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
+	if (apm_necsmm_addr != 0)
+		bus_space_write_1(iot, ioh, 0,
+			  (bus_space_read_1(iot, ioh, 0) | ~apm_necsmm_mask));
+}
+
+static __inline void
+apm_disable_smm(sc)
+	struct apm_softc *sc;
+{
+	bus_space_tag_t iot = sc->sc_iot;
+	bus_space_handle_t ioh = sc->sc_ioh;
+	if (apm_necsmm_addr != 0)
+		bus_space_write_1(iot, ioh, 0,
+			  (bus_space_read_1(iot, ioh, 0) & apm_necsmm_mask));
+}
+#endif
+
+/*
+ * return  0 if the function successfull,
+ * return  1 if the function unsuccessfull,
+ * return -1 if the function unsupported.
+ */
+static int
+apm_bioscall(void)
+{
+	struct apm_softc *sc = &apm_softc;
+	int errno = 0;
+	u_int apm_func = sc->bios.r.eax & 0xff;
+
+	if (!apm_check_function_supported(sc->intversion, apm_func)) {
+		APM_DPRINT("apm_bioscall: function 0x%x is not supported in v%d.%d\n",
+		    apm_func, sc->majorversion, sc->minorversion);
+		return (-1);
+	}
+
+	sc->bios_busy = 1;
+#ifdef	PC98
+	set_bios_selectors(&sc->bios.seg, BIOSCODE_FLAG | BIOSDATA_FLAG);
+	if (bios32_apm98(&sc->bios.r, sc->bios.entry,
+	    GSEL(GBIOSCODE32_SEL, SEL_KPL)) != 0)
+		return 1;
+#else
+	if (sc->connectmode == APM_PROT32CONNECT) {
+		set_bios_selectors(&sc->bios.seg,
+				   BIOSCODE_FLAG | BIOSDATA_FLAG);
+		errno = bios32(&sc->bios.r,
+			       sc->bios.entry, GSEL(GBIOSCODE32_SEL, SEL_KPL));
+	} else {
+		errno = bios16(&sc->bios, NULL);
+	}
+#endif
+	sc->bios_busy = 0;
+	return (errno);
+}
+
+/* check whether APM function is supported (1)  or not (0). */
+static int
+apm_check_function_supported(u_int version, u_int func)
+{
+	/* except driver version */
+	if (func == APM_DRVVERSION) {
+		return (1);
+	}
+#ifdef PC98
+	if (func == APM_GETPWSTATUS) {
+		return (1);
+	}
+#endif
+
+	switch (version) {
+	case INTVERSION(1, 0):
+		if (func > APM_GETPMEVENT) {
+			return (0); /* not supported */
+		}
+		break;
+	case INTVERSION(1, 1):
+		if (func > APM_ENGAGEDISENGAGEPM &&
+		    func < APM_OEMFUNC) {
+			return (0); /* not supported */
+		}
+		break;
+	case INTVERSION(1, 2):
+		break;
+	}
+
+	return (1); /* supported */
+}
+
+/* enable/disable power management */
+static int
+apm_enable_disable_pm(int enable)
+{
+	struct apm_softc *sc = &apm_softc;
+
+	sc->bios.r.eax = (APM_BIOS << 8) | APM_ENABLEDISABLEPM;
+
+	if (sc->intversion >= INTVERSION(1, 1))
+		sc->bios.r.ebx  = PMDV_ALLDEV;
+	else
+		sc->bios.r.ebx  = 0xffff;	/* APM version 1.0 only */
+	sc->bios.r.ecx  = enable;
+	sc->bios.r.edx = 0;
+	return (apm_bioscall());
+}
+
+/* register driver version (APM 1.1 or later) */
+static int
+apm_driver_version(int version)
+{
+	struct apm_softc *sc = &apm_softc;
+ 
+	sc->bios.r.eax = (APM_BIOS << 8) | APM_DRVVERSION;
+	sc->bios.r.ebx  = 0x0;
+	sc->bios.r.ecx  = version;
+	sc->bios.r.edx = 0;
+
+	if (apm_bioscall() == 0 && sc->bios.r.eax == version)
+		return (0);
+
+	/* Some old BIOSes don't return the connection version in %ax. */
+	if (sc->bios.r.eax == ((APM_BIOS << 8) | APM_DRVVERSION))
+		return (0);
+
+	return (1);
+}
+ 
+/* engage/disengage power management (APM 1.1 or later) */
+static int
+apm_engage_disengage_pm(int engage)
+{
+	struct apm_softc *sc = &apm_softc;
+ 
+	sc->bios.r.eax = (APM_BIOS << 8) | APM_ENGAGEDISENGAGEPM;
+	sc->bios.r.ebx = PMDV_ALLDEV;
+	sc->bios.r.ecx = engage;
+	sc->bios.r.edx = 0;
+	return (apm_bioscall());
+}
+ 
+/* get PM event */
+static u_int
+apm_getevent(void)
+{
+	struct apm_softc *sc = &apm_softc;
+ 
+	sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPMEVENT;
+ 
+	sc->bios.r.ebx = 0;
+	sc->bios.r.ecx = 0;
+	sc->bios.r.edx = 0;
+	if (apm_bioscall())
+		return (PMEV_NOEVENT);
+	return (sc->bios.r.ebx & 0xffff);
+}
+ 
+/* suspend entire system */
+static int
+apm_suspend_system(int state)
+{
+	struct apm_softc *sc = &apm_softc;
+ 
+	sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
+	sc->bios.r.ebx = PMDV_ALLDEV;
+	sc->bios.r.ecx = state;
+	sc->bios.r.edx = 0;
+ 
+#ifdef PC98
+	apm_disable_smm(sc);
+#endif
+	if (apm_bioscall()) {
+ 		printf("Entire system suspend failure: errcode = %d\n",
+		       0xff & (sc->bios.r.eax >> 8));
+ 		return 1;
+ 	}
+#ifdef PC98
+	apm_enable_smm(sc);
+#endif
+ 	return 0;
+}
+
+/* Display control */
+/*
+ * Experimental implementation: My laptop machine can't handle this function
+ * If your laptop can control the display via APM, please inform me.
+ *                            HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org>
+ */
+int
+apm_display(int newstate)
+{
+	struct apm_softc *sc = &apm_softc;
+ 
+	sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
+	sc->bios.r.ebx = PMDV_DISP0;
+	sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND;
+	sc->bios.r.edx = 0;
+	if (apm_bioscall() == 0) {
+		return 0;
+ 	}
+
+	/* If failed, then try to blank all display devices instead. */
+	sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
+	sc->bios.r.ebx = PMDV_DISPALL;	/* all display devices */
+	sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND;
+	sc->bios.r.edx = 0;
+	if (apm_bioscall() == 0) {
+		return 0;
+ 	}
+ 	printf("Display off failure: errcode = %d\n",
+	       0xff & (sc->bios.r.eax >> 8));
+ 	return 1;
+}
+
+/*
+ * Turn off the entire system.
+ */
+static void
+apm_power_off(void *junk, int howto)
+{
+	struct apm_softc *sc = &apm_softc;
+
+	/* Not halting powering off, or not active */
+	if (!(howto & RB_POWEROFF) || !apm_softc.active)
+		return;
+	sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
+	sc->bios.r.ebx = PMDV_ALLDEV;
+	sc->bios.r.ecx = PMST_OFF;
+	sc->bios.r.edx = 0;
+	(void) apm_bioscall();
+}
+
+/* APM Battery low handler */
+static void
+apm_battery_low(void)
+{
+	printf("\007\007 * * * BATTERY IS LOW * * * \007\007");
+}
+
+/* APM hook manager */
+static struct apmhook *
+apm_add_hook(struct apmhook **list, struct apmhook *ah)
+{
+	int s;
+	struct apmhook *p, *prev;
+
+	APM_DPRINT("Add hook \"%s\"\n", ah->ah_name);
+
+	s = splhigh();
+	if (ah == NULL)
+		panic("illegal apm_hook!");
+	prev = NULL;
+	for (p = *list; p != NULL; prev = p, p = p->ah_next)
+		if (p->ah_order > ah->ah_order)
+			break;
+
+	if (prev == NULL) {
+		ah->ah_next = *list;
+		*list = ah;
+	} else {
+		ah->ah_next = prev->ah_next;
+		prev->ah_next = ah;
+	}
+	splx(s);
+	return ah;
+}
+
+static void
+apm_del_hook(struct apmhook **list, struct apmhook *ah)
+{
+	int s;
+	struct apmhook *p, *prev;
+
+	s = splhigh();
+	prev = NULL;
+	for (p = *list; p != NULL; prev = p, p = p->ah_next)
+		if (p == ah)
+			goto deleteit;
+	panic("Tried to delete unregistered apm_hook.");
+	goto nosuchnode;
+deleteit:
+	if (prev != NULL)
+		prev->ah_next = p->ah_next;
+	else
+		*list = p->ah_next;
+nosuchnode:
+	splx(s);
+}
+
+
+/* APM driver calls some functions automatically */
+static void
+apm_execute_hook(struct apmhook *list)
+{
+	struct apmhook *p;
+
+	for (p = list; p != NULL; p = p->ah_next) {
+		APM_DPRINT("Execute APM hook \"%s.\"\n", p->ah_name);
+		if ((*(p->ah_fun))(p->ah_arg))
+			printf("Warning: APM hook \"%s\" failed", p->ah_name);
+	}
+}
+
+
+/* establish an apm hook */
+struct apmhook *
+apm_hook_establish(int apmh, struct apmhook *ah)
+{
+	if (apmh < 0 || apmh >= NAPM_HOOK)
+		return NULL;
+
+	return apm_add_hook(&hook[apmh], ah);
+}
+
+/* disestablish an apm hook */
+void
+apm_hook_disestablish(int apmh, struct apmhook *ah)
+{
+	if (apmh < 0 || apmh >= NAPM_HOOK)
+		return;
+
+	apm_del_hook(&hook[apmh], ah);
+}
+
+static int apm_record_event __P((struct apm_softc *, u_int));
+static void apm_processevent(void);
+
+static u_int apm_op_inprog = 0;
+
+static void
+apm_do_suspend(void)
+{
+	struct apm_softc *sc = &apm_softc;
+	int error;
+
+	if (!sc)
+		return;
+
+	apm_op_inprog = 0;
+	sc->suspends = sc->suspend_countdown = 0;
+
+	if (sc->initialized) {
+		error = DEVICE_SUSPEND(root_bus);
+		if (error) {
+			DEVICE_RESUME(root_bus);
+		} else {
+			apm_execute_hook(hook[APM_HOOK_SUSPEND]);
+			if (apm_suspend_system(PMST_SUSPEND) == 0) {
+				sc->suspending = 1;
+				apm_processevent();
+			} else {
+				/* Failure, 'resume' the system again */
+				apm_execute_hook(hook[APM_HOOK_RESUME]);
+				DEVICE_RESUME(root_bus);
+			}
+		}
+	}
+}
+
+static void
+apm_do_standby(void)
+{
+	struct apm_softc *sc = &apm_softc;
+
+	if (!sc)
+		return;
+
+	apm_op_inprog = 0;
+	sc->standbys = sc->standby_countdown = 0;
+
+	if (sc->initialized) {
+		/*
+		 * As far as standby, we don't need to execute 
+		 * all of suspend hooks.
+		 */
+		if (apm_suspend_system(PMST_STANDBY) == 0)
+			apm_processevent();
+	}
+}
+
+static void
+apm_lastreq_notify(void)
+{
+	struct apm_softc *sc = &apm_softc;
+
+	sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
+	sc->bios.r.ebx = PMDV_ALLDEV;
+	sc->bios.r.ecx = PMST_LASTREQNOTIFY;
+	sc->bios.r.edx = 0;
+	apm_bioscall();
+}
+
+static int
+apm_lastreq_rejected(void)
+{
+	struct apm_softc *sc = &apm_softc;
+
+	if (apm_op_inprog == 0) {
+		return 1;	/* no operation in progress */
+	}
+
+	sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
+	sc->bios.r.ebx = PMDV_ALLDEV;
+	sc->bios.r.ecx = PMST_LASTREQREJECT;
+	sc->bios.r.edx = 0;
+
+	if (apm_bioscall()) {
+		APM_DPRINT("apm_lastreq_rejected: failed\n");
+		return 1;
+	}
+	apm_op_inprog = 0;
+	return 0;
+}
+
+/*
+ * Public interface to the suspend/resume:
+ *
+ * Execute suspend and resume hook before and after sleep, respectively.
+ *
+ */
+
+void
+apm_suspend(int state)
+{
+	struct apm_softc *sc = &apm_softc;
+
+	if (!sc->initialized)
+		return;
+
+	switch (state) {
+	case PMST_SUSPEND:
+		if (sc->suspends)
+			return;
+		sc->suspends++;
+		sc->suspend_countdown = apm_suspend_delay;
+		break;
+	case PMST_STANDBY:
+		if (sc->standbys)
+			return;
+		sc->standbys++;
+		sc->standby_countdown = apm_standby_delay;
+		break;
+	default:
+		printf("apm_suspend: Unknown Suspend state 0x%x\n", state);
+		return;
+	}
+
+	apm_op_inprog++;
+	apm_lastreq_notify();
+}
+
+void
+apm_resume(void)
+{
+	struct apm_softc *sc = &apm_softc;
+
+	if (!sc)
+		return;
+
+	if (sc->suspending == 0)
+		return;
+
+	sc->suspending = 0;
+	if (sc->initialized) {
+		apm_execute_hook(hook[APM_HOOK_RESUME]);
+		DEVICE_RESUME(root_bus);
+	}
+}
+
+
+/* get power status per battery */
+static int
+apm_get_pwstatus(apm_pwstatus_t app)
+{
+	struct apm_softc *sc = &apm_softc;
+
+	if (app->ap_device != PMDV_ALLDEV &&
+	    (app->ap_device < PMDV_BATT0 || app->ap_device > PMDV_BATT_ALL))
+		return 1;
+
+	sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPWSTATUS;
+	sc->bios.r.ebx = app->ap_device;
+	sc->bios.r.ecx = 0;
+	sc->bios.r.edx = 0xffff;	/* default to unknown battery time */
+
+	if (apm_bioscall())
+		return 1;
+
+	app->ap_acline    = (sc->bios.r.ebx >> 8) & 0xff;
+	app->ap_batt_stat = sc->bios.r.ebx & 0xff;
+	app->ap_batt_flag = (sc->bios.r.ecx >> 8) & 0xff;
+	app->ap_batt_life = sc->bios.r.ecx & 0xff;
+	sc->bios.r.edx &= 0xffff;
+	if (sc->bios.r.edx == 0xffff)	/* Time is unknown */
+		app->ap_batt_time = -1;
+	else if (sc->bios.r.edx & 0x8000)	/* Time is in minutes */
+		app->ap_batt_time = (sc->bios.r.edx & 0x7fff) * 60;
+	else				/* Time is in seconds */
+		app->ap_batt_time = sc->bios.r.edx;
+
+	return 0;
+}
+
+
+/* get APM information */
+static int
+apm_get_info(apm_info_t aip)
+{
+	struct apm_softc *sc = &apm_softc;
+	struct apm_pwstatus aps;
+
+	bzero(&aps, sizeof(aps));
+	aps.ap_device = PMDV_ALLDEV;
+	if (apm_get_pwstatus(&aps))
+		return 1;
+
+	aip->ai_infoversion = 1;
+	aip->ai_acline      = aps.ap_acline;
+	aip->ai_batt_stat   = aps.ap_batt_stat;
+	aip->ai_batt_life   = aps.ap_batt_life;
+	aip->ai_batt_time   = aps.ap_batt_time;
+	aip->ai_major       = (u_int)sc->majorversion;
+	aip->ai_minor       = (u_int)sc->minorversion;
+	aip->ai_status      = (u_int)sc->active;
+
+	sc->bios.r.eax = (APM_BIOS << 8) | APM_GETCAPABILITIES;
+	sc->bios.r.ebx = 0;
+	sc->bios.r.ecx = 0;
+	sc->bios.r.edx = 0;
+	if (apm_bioscall()) {
+		aip->ai_batteries = -1;	/* Unknown */
+		aip->ai_capabilities = 0xff00; /* Unknown, with no bits set */
+	} else {
+		aip->ai_batteries = sc->bios.r.ebx & 0xff;
+		aip->ai_capabilities = sc->bios.r.ecx & 0xf;
+	}
+
+	bzero(aip->ai_spare, sizeof aip->ai_spare);
+
+	return 0;
+}
+
+
+/* inform APM BIOS that CPU is idle */
+void
+apm_cpu_idle(void)
+{
+	struct apm_softc *sc = &apm_softc;
+
+	if (sc->active) {
+
+		sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUIDLE;
+		sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0;
+		(void) apm_bioscall();
+	}
+	/*
+	 * Some APM implementation halts CPU in BIOS, whenever
+	 * "CPU-idle" function are invoked, but swtch() of
+	 * FreeBSD halts CPU, therefore, CPU is halted twice
+	 * in the sched loop. It makes the interrupt latency
+	 * terribly long and be able to cause a serious problem
+	 * in interrupt processing. We prevent it by removing
+	 * "hlt" operation from swtch() and managed it under
+	 * APM driver.
+	 */
+	if (!sc->active || sc->always_halt_cpu)
+		__asm("hlt");	/* wait for interrupt */
+}
+
+/* inform APM BIOS that CPU is busy */
+void
+apm_cpu_busy(void)
+{
+	struct apm_softc *sc = &apm_softc;
+
+	/*
+	 * The APM specification says this is only necessary if your BIOS
+	 * slows down the processor in the idle task, otherwise it's not
+	 * necessary.
+	 */
+	if (sc->slow_idle_cpu && sc->active) {
+
+		sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUBUSY;
+		sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0;
+		apm_bioscall();
+	}
+}
+
+
+/*
+ * APM timeout routine:
+ *
+ * This routine is automatically called by timer once per second.
+ */
+
+static void
+apm_timeout(void *dummy)
+{
+	struct apm_softc *sc = &apm_softc;
+
+	if (apm_op_inprog)
+		apm_lastreq_notify();
+
+	if (sc->standbys && sc->standby_countdown-- <= 0)
+		apm_do_standby();
+
+	if (sc->suspends && sc->suspend_countdown-- <= 0)
+		apm_do_suspend();
+
+	if (!sc->bios_busy)
+		apm_processevent();
+
+	if (sc->active == 1)
+		/* Run slightly more oftan than 1 Hz */
+		apm_timeout_ch = timeout(apm_timeout, NULL, hz - 1 );
+}
+
+/* enable APM BIOS */
+static void
+apm_event_enable(void)
+{
+	struct apm_softc *sc = &apm_softc;
+
+	APM_DPRINT("called apm_event_enable()\n");
+	if (sc->initialized) {
+		sc->active = 1;
+		apm_timeout(sc);
+	}
+}
+
+/* disable APM BIOS */
+static void
+apm_event_disable(void)
+{
+	struct apm_softc *sc = &apm_softc;
+
+	APM_DPRINT("called apm_event_disable()\n");
+	if (sc->initialized) {
+		untimeout(apm_timeout, NULL, apm_timeout_ch);
+		sc->active = 0;
+	}
+}
+
+/* halt CPU in scheduling loop */
+static void
+apm_halt_cpu(void)
+{
+	struct apm_softc *sc = &apm_softc;
+
+	if (sc->initialized)
+		sc->always_halt_cpu = 1;
+}
+
+/* don't halt CPU in scheduling loop */
+static void
+apm_not_halt_cpu(void)
+{
+	struct apm_softc *sc = &apm_softc;
+
+	if (sc->initialized)
+		sc->always_halt_cpu = 0;
+}
+
+/* device driver definitions */
+
+/*
+ * Create "connection point"
+ */
+static void
+apm_identify(driver_t *driver, device_t parent)
+{
+	device_t child;
+
+	child = BUS_ADD_CHILD(parent, 0, "apm", 0);
+	if (child == NULL)
+		panic("apm_identify");
+}
+
+/*
+ * probe for APM BIOS
+ */
+static int
+apm_probe(device_t dev)
+{
+#define APM_KERNBASE	KERNBASE
+	struct vm86frame	vmf;
+	struct apm_softc	*sc = &apm_softc;
+	int			disabled, flags;
+#ifdef PC98
+	int			rid;
+#endif
+
+	if (resource_int_value("apm", 0, "disabled", &disabled) == 0
+	    && disabled != 0)
+		return ENXIO;
+
+	device_set_desc(dev, "APM BIOS");
+
+	if ( device_get_unit(dev) > 0 ) {
+		printf("apm: Only one APM driver supported.\n");
+		return ENXIO;
+	}
+
+	if (resource_int_value("apm", 0, "flags", &flags) != 0)
+		flags = 0;
+
+	bzero(&vmf, sizeof(struct vm86frame));		/* safety */
+	bzero(&apm_softc, sizeof(apm_softc));
+	vmf.vmf_ah = APM_BIOS;
+	vmf.vmf_al = APM_INSTCHECK;
+	vmf.vmf_bx = 0;
+	if (vm86_intcall(APM_INT, &vmf))
+		return ENXIO;			/* APM not found */
+	if (vmf.vmf_bx != 0x504d) {
+		printf("apm: incorrect signature (0x%x)\n", vmf.vmf_bx);
+		return ENXIO;
+	}
+	if ((vmf.vmf_cx & (APM_32BIT_SUPPORT | APM_16BIT_SUPPORT)) == 0) {
+		printf("apm: protected mode connections are not supported\n");
+		return ENXIO;
+	}
+
+	apm_version = vmf.vmf_ax;
+	sc->slow_idle_cpu = ((vmf.vmf_cx & APM_CPUIDLE_SLOW) != 0);
+	sc->disabled = ((vmf.vmf_cx & APM_DISABLED) != 0);
+	sc->disengaged = ((vmf.vmf_cx & APM_DISENGAGED) != 0);
+
+	vmf.vmf_ah = APM_BIOS;
+	vmf.vmf_al = APM_DISCONNECT;
+	vmf.vmf_bx = 0;
+        vm86_intcall(APM_INT, &vmf);		/* disconnect, just in case */
+
+#ifdef PC98
+	/* PC98 have bogos APM 32bit BIOS */
+	if ((vmf.vmf_cx & APM_32BIT_SUPPORT) == 0)
+		return ENXIO;
+	rid = 0;
+	sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
+			 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE);
+	if (sc->sc_res == NULL) {
+		printf("apm: cannot open NEC smm device\n");
+		return ENXIO;
+	}
+	bus_release_resource(dev, SYS_RES_IOPORT, rid, sc->sc_res);
+
+	vmf.vmf_ah = APM_BIOS;
+	vmf.vmf_al = APM_PROT32CONNECT;
+	vmf.vmf_bx = 0;
+	if (vm86_intcall(APM_INT, &vmf)) {
+		printf("apm: 32-bit connection error.\n");
+		return (ENXIO);
+ 	}
+
+	sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
+	sc->bios.seg.code32.limit = 0xffff;
+	sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
+	sc->bios.seg.code16.limit = 0xffff;
+	sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE;
+	sc->bios.seg.data.limit = 0xffff;
+	sc->bios.entry = vmf.vmf_ebx;
+	sc->connectmode = APM_PROT32CONNECT;
+#else
+	if ((vmf.vmf_cx & APM_32BIT_SUPPORT) != 0) {
+		vmf.vmf_ah = APM_BIOS;
+		vmf.vmf_al = APM_PROT32CONNECT;
+		vmf.vmf_bx = 0;
+		if (vm86_intcall(APM_INT, &vmf)) {
+			printf("apm: 32-bit connection error.\n");
+			return (ENXIO);
+ 		}
+		sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
+		sc->bios.seg.code32.limit = 0xffff;
+		sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
+		sc->bios.seg.code16.limit = 0xffff;
+		sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE;
+		sc->bios.seg.data.limit = 0xffff;
+		sc->bios.entry = vmf.vmf_ebx;
+		sc->connectmode = APM_PROT32CONNECT;
+ 	} else {
+		/* use 16-bit connection */
+		vmf.vmf_ah = APM_BIOS;
+		vmf.vmf_al = APM_PROT16CONNECT;
+		vmf.vmf_bx = 0;
+		if (vm86_intcall(APM_INT, &vmf)) {
+			printf("apm: 16-bit connection error.\n");
+			return (ENXIO);
+		}
+		sc->bios.seg.code16.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
+		sc->bios.seg.code16.limit = 0xffff;
+		sc->bios.seg.data.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
+		sc->bios.seg.data.limit = 0xffff;
+		sc->bios.entry = vmf.vmf_bx;
+		sc->connectmode = APM_PROT16CONNECT;
+	}
+#endif
+	return(0);
+}
+
+
+/*
+ * return 0 if the user will notice and handle the event,
+ * return 1 if the kernel driver should do so.
+ */
+static int
+apm_record_event(struct apm_softc *sc, u_int event_type)
+{
+	struct apm_event_info *evp;
+
+	if ((sc->sc_flags & SCFLAG_OPEN) == 0)
+		return 1;		/* no user waiting */
+	if (sc->event_count == APM_NEVENTS)
+		return 1;			/* overflow */
+	if (sc->event_filter[event_type] == 0)
+		return 1;		/* not registered */
+	evp = &sc->event_list[sc->event_ptr];
+	sc->event_count++;
+	sc->event_ptr++;
+	sc->event_ptr %= APM_NEVENTS;
+	evp->type = event_type;
+	evp->index = ++apm_evindex;
+	selwakeup(&sc->sc_rsel);
+	return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */
+}
+
+/* Process APM event */
+static void
+apm_processevent(void)
+{
+	int apm_event;
+	struct apm_softc *sc = &apm_softc;
+
+#define OPMEV_DEBUGMESSAGE(symbol) case symbol:				\
+	APM_DPRINT("Received APM Event: " #symbol "\n");
+
+	do {
+		apm_event = apm_getevent();
+		switch (apm_event) {
+		    OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ);
+			if (apm_op_inprog == 0) {
+			    apm_op_inprog++;
+			    if (apm_record_event(sc, apm_event)) {
+				apm_suspend(PMST_STANDBY);
+			    }
+			}
+			break;
+		    OPMEV_DEBUGMESSAGE(PMEV_USERSTANDBYREQ);
+			if (apm_op_inprog == 0) {
+			    apm_op_inprog++;
+			    if (apm_record_event(sc, apm_event)) {
+				apm_suspend(PMST_STANDBY);
+			    }
+			}
+			break;
+		    OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ);
+ 			apm_lastreq_notify();
+			if (apm_op_inprog == 0) {
+			    apm_op_inprog++;
+			    if (apm_record_event(sc, apm_event)) {
+				apm_do_suspend();
+			    }
+			}
+			return; /* XXX skip the rest */
+		    OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ);
+ 			apm_lastreq_notify();
+			if (apm_op_inprog == 0) {
+			    apm_op_inprog++;
+			    if (apm_record_event(sc, apm_event)) {
+				apm_do_suspend();
+			    }
+			}
+			return; /* XXX skip the rest */
+		    OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND);
+			apm_do_suspend();
+			break;
+		    OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME);
+			apm_record_event(sc, apm_event);
+			apm_resume();
+			break;
+		    OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME);
+			apm_record_event(sc, apm_event);
+			apm_resume();
+			break;
+		    OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME);
+			apm_record_event(sc, apm_event);
+			break;
+		    OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW);
+			if (apm_record_event(sc, apm_event)) {
+			    apm_battery_low();
+			    apm_suspend(PMST_SUSPEND);
+			}
+			break;
+		    OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE);
+			apm_record_event(sc, apm_event);
+			break;
+		    OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME);
+			apm_record_event(sc, apm_event);
+			inittodr(0);	/* adjust time to RTC */
+			break;
+		    OPMEV_DEBUGMESSAGE(PMEV_CAPABILITIESCHANGE);
+			apm_record_event(sc, apm_event);
+			break;
+		    case PMEV_NOEVENT:
+			break;
+		    default:
+			printf("Unknown Original APM Event 0x%x\n", apm_event);
+			    break;
+		}
+	} while (apm_event != PMEV_NOEVENT);
+#ifdef PC98
+	apm_disable_smm(sc);
+#endif
+}
+
+/*
+ * Attach APM:
+ *
+ * Initialize APM driver
+ */
+
+static int
+apm_attach(device_t dev)
+{
+	struct apm_softc	*sc = &apm_softc;
+	int			flags;
+	int			drv_version;
+#ifdef PC98
+	int			rid;
+#endif
+
+	if (resource_int_value("apm", 0, "flags", &flags) != 0)
+		flags = 0;
+
+	if (flags & 0x20)
+		statclock_disable = 1;
+
+	sc->initialized = 0;
+
+	/* Must be externally enabled */
+	sc->active = 0;
+
+	/* Always call HLT in idle loop */
+	sc->always_halt_cpu = 1;
+
+	getenv_int("debug.apm_debug", &apm_debug);
+
+	/* print bootstrap messages */
+	APM_DPRINT("apm: APM BIOS version %04lx\n",  apm_version);
+	APM_DPRINT("apm: Code16 0x%08x, Data 0x%08x\n",
+	    sc->bios.seg.code16.base, sc->bios.seg.data.base);
+	APM_DPRINT("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n",
+	    sc->bios.entry, is_enabled(sc->slow_idle_cpu),
+	    is_enabled(!sc->disabled));
+	APM_DPRINT("apm: CS_limit=0x%x, DS_limit=0x%x\n",
+	    sc->bios.seg.code16.limit, sc->bios.seg.data.limit);
+
+#ifdef PC98
+	rid = 0;
+	sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
+			 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE);
+	if (sc->sc_res == NULL)
+		panic("%s: counldn't map I/O ports", device_get_name(dev));
+	sc->sc_iot = rman_get_bustag(sc->sc_res);
+	sc->sc_ioh = rman_get_bushandle(sc->sc_res);
+
+	if (apm_version==0x112 || apm_version==0x111 || apm_version==0x110)
+		apm_necsmm_addr = APM_NECSMM_PORT;
+	else
+		apm_necsmm_addr = 0;
+	apm_necsmm_mask = ~APM_NECSMM_EN;
+#endif /* PC98 */
+
+	/*
+         * In one test, apm bios version was 1.02; an attempt to register
+         * a 1.04 driver resulted in a 1.00 connection!  Registering a
+         * 1.02 driver resulted in a 1.02 connection.
+         */
+	drv_version = apm_version > 0x102 ? 0x102 : apm_version;
+	for (; drv_version > 0x100; drv_version--)
+		if (apm_driver_version(drv_version) == 0)
+			break;
+	sc->minorversion = ((drv_version & 0x00f0) >>  4) * 10 +
+		((drv_version & 0x000f) >> 0);
+	sc->majorversion = ((drv_version & 0xf000) >> 12) * 10 +
+		((apm_version & 0x0f00) >> 8);
+
+	sc->intversion = INTVERSION(sc->majorversion, sc->minorversion);
+
+	if (sc->intversion >= INTVERSION(1, 1))
+		APM_DPRINT("apm: Engaged control %s\n", is_enabled(!sc->disengaged));
+	device_printf(dev, "found APM BIOS v%ld.%ld, connected at v%d.%d\n",
+	       ((apm_version & 0xf000) >> 12) * 10 + ((apm_version & 0x0f00) >> 8),
+	       ((apm_version & 0x00f0) >> 4) * 10 + ((apm_version & 0x000f) >> 0),
+	       sc->majorversion, sc->minorversion);
+
+
+	APM_DPRINT("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu));
+	/* enable power management */
+	if (sc->disabled) {
+		if (apm_enable_disable_pm(1)) {
+			APM_DPRINT("apm: *Warning* enable function failed! [%x]\n",
+			    (sc->bios.r.eax >> 8) & 0xff);
+		}
+	}
+
+	/* engage power managment (APM 1.1 or later) */
+	if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) {
+		if (apm_engage_disengage_pm(1)) {
+			APM_DPRINT("apm: *Warning* engage function failed err=[%x]",
+			    (sc->bios.r.eax >> 8) & 0xff);
+			APM_DPRINT(" (Docked or using external power?).\n");
+		}
+	}
+
+	/* Power the system off using APM */
+	EVENTHANDLER_REGISTER(shutdown_final, apm_power_off, NULL, 
+			      SHUTDOWN_PRI_LAST);
+
+	sc->initialized = 1;
+	sc->suspending = 0;
+
+	make_dev(&apm_cdevsw, 0, 0, 5, 0660, "apm");
+	make_dev(&apm_cdevsw, 8, 0, 5, 0660, "apmctl");
+	return 0;
+}
+
+static int
+apmopen(dev_t dev, int flag, int fmt, struct proc *p)
+{
+	struct apm_softc *sc = &apm_softc;
+	int ctl = APMDEV(dev);
+
+	if (!sc->initialized)
+		return (ENXIO);
+
+	switch (ctl) {
+	case APMDEV_CTL:
+		if (!(flag & FWRITE))
+			return EINVAL;
+		if (sc->sc_flags & SCFLAG_OCTL)
+			return EBUSY;
+		sc->sc_flags |= SCFLAG_OCTL;
+		bzero(sc->event_filter, sizeof sc->event_filter);
+		break;
+	case APMDEV_NORMAL:
+		sc->sc_flags |= SCFLAG_ONORMAL;
+		break;
+	default:
+		return ENXIO;
+		break;
+	}
+	return 0;
+}
+
+static int
+apmclose(dev_t dev, int flag, int fmt, struct proc *p)
+{
+	struct apm_softc *sc = &apm_softc;
+	int ctl = APMDEV(dev);
+
+	switch (ctl) {
+	case APMDEV_CTL:
+		apm_lastreq_rejected();
+		sc->sc_flags &= ~SCFLAG_OCTL;
+		bzero(sc->event_filter, sizeof sc->event_filter);
+		break;
+	case APMDEV_NORMAL:
+		sc->sc_flags &= ~SCFLAG_ONORMAL;
+		break;
+	}
+	if ((sc->sc_flags & SCFLAG_OPEN) == 0) {
+		sc->event_count = 0;
+		sc->event_ptr = 0;
+	}
+	return 0;
+}
+
+static int
+apmioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
+{
+	struct apm_softc *sc = &apm_softc;
+	struct apm_bios_arg *args;
+	int error = 0;
+	int ret;
+	int newstate;
+
+	if (!sc->initialized)
+		return (ENXIO);
+	APM_DPRINT("APM ioctl: cmd = 0x%lx\n", cmd);
+	switch (cmd) {
+	case APMIO_SUSPEND:
+		if (!(flag & FWRITE))
+			return (EPERM);
+		if (sc->active)
+			apm_suspend(PMST_SUSPEND);
+		else
+			error = EINVAL;
+		break;
+
+	case APMIO_STANDBY:
+		if (!(flag & FWRITE))
+			return (EPERM);
+		if (sc->active)
+			apm_suspend(PMST_STANDBY);
+		else
+			error = EINVAL;
+		break;
+
+	case APMIO_GETINFO_OLD:
+		{
+			struct apm_info info;
+			apm_info_old_t aiop;
+
+			if (apm_get_info(&info))
+				error = ENXIO;
+			aiop = (apm_info_old_t)addr;
+			aiop->ai_major = info.ai_major;
+			aiop->ai_minor = info.ai_minor;
+			aiop->ai_acline = info.ai_acline;
+			aiop->ai_batt_stat = info.ai_batt_stat;
+			aiop->ai_batt_life = info.ai_batt_life;
+			aiop->ai_status = info.ai_status;
+		}
+		break;
+	case APMIO_GETINFO:
+		if (apm_get_info((apm_info_t)addr))
+			error = ENXIO;
+		break;
+	case APMIO_GETPWSTATUS:
+		if (apm_get_pwstatus((apm_pwstatus_t)addr))
+			error = ENXIO;
+		break;
+	case APMIO_ENABLE:
+		if (!(flag & FWRITE))
+			return (EPERM);
+		apm_event_enable();
+		break;
+	case APMIO_DISABLE:
+		if (!(flag & FWRITE))
+			return (EPERM);
+		apm_event_disable();
+		break;
+	case APMIO_HALTCPU:
+		if (!(flag & FWRITE))
+			return (EPERM);
+		apm_halt_cpu();
+		break;
+	case APMIO_NOTHALTCPU:
+		if (!(flag & FWRITE))
+			return (EPERM);
+		apm_not_halt_cpu();
+		break;
+	case APMIO_DISPLAY:
+		if (!(flag & FWRITE))
+			return (EPERM);
+		newstate = *(int *)addr;
+		if (apm_display(newstate))
+			error = ENXIO;
+		break;
+	case APMIO_BIOS:
+		if (!(flag & FWRITE))
+			return (EPERM);
+		/* XXX compatibility with the old interface */
+		args = (struct apm_bios_arg *)addr;
+		sc->bios.r.eax = args->eax;
+		sc->bios.r.ebx = args->ebx;
+		sc->bios.r.ecx = args->ecx;
+		sc->bios.r.edx = args->edx;
+		sc->bios.r.esi = args->esi;
+		sc->bios.r.edi = args->edi;
+		if ((ret = apm_bioscall())) {
+			/*
+			 * Return code 1 means bios call was unsuccessful.
+			 * Error code is stored in %ah.
+			 * Return code -1 means bios call was unsupported
+			 * in the APM BIOS version.
+			 */
+			if (ret == -1) {
+				error = EINVAL;
+			}
+		} else {
+			/*
+			 * Return code 0 means bios call was successful.
+			 * We need only %al and can discard %ah.
+			 */
+			sc->bios.r.eax &= 0xff;
+		}
+		args->eax = sc->bios.r.eax;
+		args->ebx = sc->bios.r.ebx;
+		args->ecx = sc->bios.r.ecx;
+		args->edx = sc->bios.r.edx;
+		args->esi = sc->bios.r.esi;
+		args->edi = sc->bios.r.edi;
+		break;
+	default:
+		error = EINVAL;
+		break;
+	}
+
+	/* for /dev/apmctl */
+	if (APMDEV(dev) == APMDEV_CTL) {
+		struct apm_event_info *evp;
+		int i;
+
+		error = 0;
+		switch (cmd) {
+		case APMIO_NEXTEVENT:
+			if (!sc->event_count) {
+				error = EAGAIN;
+			} else {
+				evp = (struct apm_event_info *)addr;
+				i = sc->event_ptr + APM_NEVENTS - sc->event_count;
+				i %= APM_NEVENTS;
+				*evp = sc->event_list[i];
+				sc->event_count--;
+			}
+			break;
+		case APMIO_REJECTLASTREQ:
+			if (apm_lastreq_rejected()) {
+				error = EINVAL;
+			}
+			break;
+		default:
+			error = EINVAL;
+			break;
+		}
+	}
+
+	return error;
+}
+
+static int
+apmwrite(dev_t dev, struct uio *uio, int ioflag)
+{
+	struct apm_softc *sc = &apm_softc;
+	u_int event_type;
+	int error;
+	u_char enabled;
+
+	if (APMDEV(dev) != APMDEV_CTL)
+		return(ENODEV);
+	if (uio->uio_resid != sizeof(u_int))
+		return(E2BIG);
+
+	if ((error = uiomove((caddr_t)&event_type, sizeof(u_int), uio)))
+		return(error);
+
+	if (event_type < 0 || event_type >= APM_NPMEV)
+		return(EINVAL);
+
+	if (sc->event_filter[event_type] == 0) {
+		enabled = 1;
+	} else {
+		enabled = 0;
+	}
+	sc->event_filter[event_type] = enabled;
+	APM_DPRINT("apmwrite: event 0x%x %s\n", event_type, is_enabled(enabled));
+
+	return uio->uio_resid;
+}
+
+static int
+apmpoll(dev_t dev, int events, struct proc *p)
+{
+	struct apm_softc *sc = &apm_softc;
+	int revents = 0;
+
+	if (events & (POLLIN | POLLRDNORM)) {
+		if (sc->event_count) {
+			revents |= events & (POLLIN | POLLRDNORM);
+		} else {
+			selrecord(p, &sc->sc_rsel);
+		}
+	}
+
+	return (revents);
+}
+
+static device_method_t apm_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_identify,	apm_identify),
+	DEVMETHOD(device_probe,		apm_probe),
+	DEVMETHOD(device_attach,	apm_attach),
+
+	{ 0, 0 }
+};
+
+static driver_t apm_driver = {
+	"apm",
+	apm_methods,
+	1,			/* no softc (XXX) */
+};
+
+static devclass_t apm_devclass;
+
+DRIVER_MODULE(apm, nexus, apm_driver, apm_devclass, 0, 0);
diff --git a/sys/pc98/apm/apm.h b/sys/pc98/apm/apm.h
new file mode 100644
index 0000000..038d7d8
--- /dev/null
+++ b/sys/pc98/apm/apm.h
@@ -0,0 +1,49 @@
+/*
+ * APM (Advanced Power Management) BIOS Device Driver
+ *
+ * Copyright (c) 1994 UKAI, Fumitoshi.
+ * Copyright (c) 1994-1995 by HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org>
+ * Copyright (c) 1996 Nate Williams <nate@FreeBSD.org>
+ * Copyright (c) 1997 Poul-Henning Kamp <phk@FreeBSD.org>
+ *
+ * This software may be used, modified, copied, and distributed, in
+ * both source and binary form provided that the above copyright and
+ * these terms are retained. Under no circumstances is the author
+ * responsible for the proper functioning of this software, nor does
+ * the author assume any responsibility for damages incurred with its
+ * use.
+ *
+ * Sep, 1994	Implemented on FreeBSD 1.1.5.1R (Toshiba AVS001WD)
+ *
+ * $FreeBSD$
+ */
+
+#define APM_NEVENTS 16
+#define APM_NPMEV   13
+
+/* static data */
+struct apm_softc {
+#ifdef PC98
+	bus_space_tag_t		sc_iot;
+	bus_space_handle_t	sc_ioh;
+	struct resource 	*sc_res;
+#endif
+	int	initialized, active, bios_busy;
+	int	always_halt_cpu, slow_idle_cpu;
+	int	disabled, disengaged;
+	int	suspending;
+	int	standby_countdown, suspend_countdown;
+	u_int	minorversion, majorversion;
+	u_int	intversion, connectmode;
+	u_int	standbys, suspends;
+	struct bios_args bios;
+	struct apmhook sc_suspend;
+	struct apmhook sc_resume;
+	struct selinfo sc_rsel;
+	int	sc_flags;
+	int	event_count;
+	int	event_ptr;
+	struct	apm_event_info event_list[APM_NEVENTS];
+	u_char	event_filter[APM_NPMEV];
+};
+
diff --git a/sys/pc98/apm/apm_bioscall.s b/sys/pc98/apm/apm_bioscall.s
new file mode 100644
index 0000000..a016dd7
--- /dev/null
+++ b/sys/pc98/apm/apm_bioscall.s
@@ -0,0 +1,89 @@
+/*-
+ * Copyright (c) 1997 Jonathan Lemon
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * Functions for calling x86 BIOS functions from the BSD kernel
+ */
+	
+#include <machine/asmacros.h>
+
+#include "assym.s"
+
+	.text
+
+/*
+ * bios32_apm98(regs, offset, segment)
+ *	struct bios_regs *regs;
+ *	u_int offset;
+ * 	u_short segment;
+ */
+ENTRY(bios32_apm98)
+	pushl	%ebp
+	movl	16(%esp),%ebp
+	mov	%bp,_bioscall_vector+4
+	movl	12(%esp),%ebp
+	movl	%ebp,_bioscall_vector
+	movl	8(%esp),%ebp
+	pushl	%ebx
+	pushl	%esi
+	pushl	%edi
+	movl	0(%ebp),%eax
+	movl	4(%ebp),%ebx
+	movl	8(%ebp),%ecx
+	movl	12(%ebp),%edx
+	movl	16(%ebp),%esi
+	movl	20(%ebp),%edi
+	pushl	%ebp
+	pushfl
+	cli
+	lcall	*_bioscall_vector
+	movl	%eax,%edi
+	movl	%edx,%esi
+	lahf
+	movl	apm_necsmm_addr,%edx
+	andl	%edx,%edx
+	jz	9f
+	inb	%dx,%al
+	andl	apm_necsmm_mask,%eax
+	outb	%al,%dx
+9:	
+	sti
+	popl	%ebp
+	movl	%edi,0(%ebp)
+	movl	%ebx,4(%ebp)
+	movl	%ecx,8(%ebp)
+	movl	%esi,12(%ebp)
+	movl	$0,16(%ebp)	/* esi is cannot get */
+	movl	$0,20(%ebp)	/* edi is cannot get */
+	movl	%edi,%eax
+	andl	$0x100,%eax
+	popl	%edi
+	popl	%esi
+	popl	%ebx
+	popl	%ebp
+	ret