diff options
author | nyan <nyan@FreeBSD.org> | 2001-01-23 12:37:15 +0000 |
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committer | nyan <nyan@FreeBSD.org> | 2001-01-23 12:37:15 +0000 |
commit | 52c12909ebc46a4969c5a8b54e24f66294303a52 (patch) | |
tree | 5f1067d20cada6f1ff8dace3ce0945773009f78d /sys/pc98/apm | |
parent | 7eafba69d54138a0429c71ddd6080ad718f3527c (diff) | |
download | FreeBSD-src-52c12909ebc46a4969c5a8b54e24f66294303a52.zip FreeBSD-src-52c12909ebc46a4969c5a8b54e24f66294303a52.tar.gz |
Added pc98 apm driver.
Submitted by: MURAMATSU Atsushi <amura@ma3.seikyou.ne.jp>
Diffstat (limited to 'sys/pc98/apm')
-rw-r--r-- | sys/pc98/apm/apm.c | 1434 | ||||
-rw-r--r-- | sys/pc98/apm/apm.h | 49 | ||||
-rw-r--r-- | sys/pc98/apm/apm_bioscall.s | 89 |
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 |