diff options
| author | Michael Shalayeff <mickey@cvs.openbsd.org> | 2006-02-01 13:08:13 +0000 |
|---|---|---|
| committer | Michael Shalayeff <mickey@cvs.openbsd.org> | 2006-02-01 13:08:13 +0000 |
| commit | db7f9ac020d0063f02eaea0064778ff0bd8bf403 (patch) | |
| tree | 1e910fedb523b09786d8bee0c4d83074829d6ae8 /sys | |
| parent | 9b993c6aa4481a2c34fb2ef6bb1fc05ea7bcaab3 (diff) | |
implement a much better 27mhz tc found on geode; inspired by freebsd; grange@ ok
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/arch/i386/pci/geodesc.c | 34 | ||||
| -rw-r--r-- | sys/arch/i386/pci/geodescreg.h | 9 |
2 files changed, 41 insertions, 2 deletions
diff --git a/sys/arch/i386/pci/geodesc.c b/sys/arch/i386/pci/geodesc.c index a017c56e73a..a20d148e43b 100644 --- a/sys/arch/i386/pci/geodesc.c +++ b/sys/arch/i386/pci/geodesc.c @@ -1,4 +1,4 @@ -/* $OpenBSD: geodesc.c,v 1.4 2005/11/19 01:59:36 aaron Exp $ */ +/* $OpenBSD: geodesc.c,v 1.5 2006/02/01 13:08:12 mickey Exp $ */ /* * Copyright (c) 2003 Markus Friedl <markus@openbsd.org> @@ -25,6 +25,9 @@ #include <sys/param.h> #include <sys/systm.h> #include <sys/device.h> +#ifdef __HAVE_TIMECOUNTER +#include <sys/timetc.h> +#endif #include <machine/bus.h> @@ -51,6 +54,19 @@ struct cfdriver geodesc_cd = { NULL, "geodesc", DV_DULL }; +#ifdef __HAVE_TIMECOUNTER +u_int geodesc_get_timecount(struct timecounter *tc); + +struct timecounter geodesc_timecounter = { + geodesc_get_timecount, /* get_timecount */ + 0, /* no poll_pps */ + 0xffffffff, /* counter_mask */ + 27000000, /* frequency */ + "GEOTSC", /* name */ + 2000 /* quality */ +}; +#endif /* __HAVE_TIMECOUNTER */ + int geodesc_match(struct device *parent, void *match, void *aux) { @@ -102,6 +118,12 @@ geodesc_attach(struct device *parent, struct device *self, void *aux) bus_space_write_2(sc->sc_iot, sc->sc_ioh, GCB_WDCNFG, cnfg); wdog_register(sc, geodesc_wdogctl_cb); +#ifdef __HAVE_TIMECOUNTER + bus_space_write_4(sc->sc_iot, sc->sc_ioh, GCB_TSCNFG, TSC_ENABLE); + /* Hook into the kern_tc */ + geodesc_timecounter.tc_priv = sc; + tc_init(&geodesc_timecounter); +#endif /* __HAVE_TIMECOUNTER */ } int @@ -114,3 +136,13 @@ geodesc_wdogctl_cb(void *self, int period) bus_space_write_2(sc->sc_iot, sc->sc_ioh, GCB_WDTO, period * 64); return (period); } + +#ifdef __HAVE_TIMECOUNTER +u_int +geodesc_get_timecount(struct timecounter *tc) +{ + struct geodesc_softc *sc = tc->tc_priv; + + return (bus_space_read_4(sc->sc_iot, sc->sc_ioh, GCB_TSC)); +} +#endif /* __HAVE_TIMECOUNTER */ diff --git a/sys/arch/i386/pci/geodescreg.h b/sys/arch/i386/pci/geodescreg.h index 9af05ba1ced..0f480b944d3 100644 --- a/sys/arch/i386/pci/geodescreg.h +++ b/sys/arch/i386/pci/geodescreg.h @@ -1,4 +1,4 @@ -/* $OpenBSD: geodescreg.h,v 1.2 2003/08/07 16:59:37 mickey Exp $ */ +/* $OpenBSD: geodescreg.h,v 1.3 2006/02/01 13:08:12 mickey Exp $ */ /* * Copyright (c) 2003 Markus Friedl <markus@openbsd.org> @@ -28,6 +28,8 @@ #define GCB_WDTO 0x0000 /* WATCHDOG Timeout */ #define GCB_WDCNFG 0x0002 /* WATCHDOG Configuration */ #define GCB_WDSTS 0x0004 /* WATCHDOG Status */ +#define GCB_TSC 0x0008 /* Cyclecounter at 27MHz */ +#define GCB_TSCNFG 0x000c /* config for the above */ #define GCB_IID 0x003c /* IA On a Chip ID */ #define GCB_REV 0x003d /* Revision */ #define GCB_CBA 0x003e /* Configuration Base Address */ @@ -42,3 +44,8 @@ #define WDPRES_DIV_8192 0x000d #define WDCNFG_MASK 0x00ff #define WDOVF_CLEAR 0x0001 + +/* cyclecounter */ + +#define TSC_ENABLE 0x0200 + |