diff options
| author | mdodd <mdodd@FreeBSD.org> | 2003-06-22 05:08:10 +0000 |
|---|---|---|
| committer | mdodd <mdodd@FreeBSD.org> | 2003-06-22 05:08:10 +0000 |
| commit | fa74d565f1d2449ff39d71733ad38e86bd7c66a0 (patch) | |
| tree | 571973a03acfbd5be863356734e2e4d2bcdb4dcc /sys/i386/bios | |
| parent | 768b08c167a71febe6dfe07d6208897dff50feb7 (diff) | |
| download | FreeBSD-src-fa74d565f1d2449ff39d71733ad38e86bd7c66a0.zip FreeBSD-src-fa74d565f1d2449ff39d71733ad38e86bd7c66a0.tar.gz | |
Implement a loader tunable/sysctl to allow the user to request that
the APM driver byte-swap battery time values. (For broken laptops.)
PR: i386/42439
Submitted by: Bruce M Simpson <bms@spc.org>
Diffstat (limited to 'sys/i386/bios')
| -rw-r--r-- | sys/i386/bios/apm.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/sys/i386/bios/apm.c b/sys/i386/bios/apm.c index 4ad4b17..016d924 100644 --- a/sys/i386/bios/apm.c +++ b/sys/i386/bios/apm.c @@ -38,6 +38,7 @@ __FBSDID("$FreeBSD$"); #include <machine/apm_bios.h> #include <machine/clock.h> +#include <machine/endian.h> #include <machine/pc/bios.h> #include <machine/cpufunc.h> #include <machine/segments.h> @@ -119,6 +120,7 @@ static struct cdevsw apm_cdevsw = { static int apm_suspend_delay = 1; static int apm_standby_delay = 1; +static int apm_swab_batt_minutes = 0; static int apm_debug = 0; #define APM_DPRINT(args...) do { \ @@ -131,6 +133,10 @@ SYSCTL_INT(_machdep, OID_AUTO, apm_suspend_delay, CTLFLAG_RW, &apm_suspend_delay 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, ""); +TUNABLE_INT("machdep.apm_swab_batt_minutes", &apm_swab_batt_minutes); +SYSCTL_INT(_machdep, OID_AUTO, apm_swab_batt_minutes, CTLFLAG_RW, + &apm_swab_batt_minutes, 0, "Byte swap battery time value."); + #ifdef PC98 static __inline void apm_enable_smm(sc) @@ -629,6 +635,8 @@ apm_get_pwstatus(apm_pwstatus_t app) 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 (apm_swab_batt_minutes) + sc->bios.r.edx = __bswap16(sc->bios.r.edx) | 0x8000; 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 */ |
