Author: adrian Date: Sat Jun 19 12:12:39 2010 New Revision: 209338 URL: http://svn.freebsd.org/changeset/base/209338
Log: Extend the AR71XX watchdog debugging and data. * Add some per-device sysctl entries which record the watchdog state - whether it is armed; whether the last reboot was due to the watchdog. * Add a per-device sysctl debug flag to enable logging watchdog arming/ disarming. Reviewed by: gonzo@ Modified: head/sys/mips/atheros/ar71xx_wdog.c Modified: head/sys/mips/atheros/ar71xx_wdog.c ============================================================================== --- head/sys/mips/atheros/ar71xx_wdog.c Sat Jun 19 10:33:04 2010 (r209337) +++ head/sys/mips/atheros/ar71xx_wdog.c Sat Jun 19 12:12:39 2010 (r209338) @@ -38,12 +38,15 @@ __FBSDID("$FreeBSD$"); #include <sys/bus.h> #include <sys/kernel.h> #include <sys/module.h> +#include <sys/sysctl.h> #include <mips/atheros/ar71xxreg.h> struct ar71xx_wdog_softc { device_t dev; int armed; + int reboot_from_watchdog; + int debug; }; static void @@ -53,9 +56,13 @@ ar71xx_wdog_watchdog_fn(void *private, u uint64_t timer_val; cmd &= WD_INTERVAL; + if (sc->debug) + device_printf(sc->dev, "ar71xx_wdog_watchdog_fn: cmd: %x\n", cmd); if (cmd > 0) { timer_val = (uint64_t)(1ULL << cmd) * ar71xx_ahb_freq() / 1000000000; + if (sc->debug) + device_printf(sc->dev, "ar71xx_wdog_watchdog_fn: programming timer: %jx\n", (uintmax_t) timer_val); /* * Load timer with large enough value to prevent spurious * reset @@ -69,6 +76,8 @@ ar71xx_wdog_watchdog_fn(void *private, u sc->armed = 1; *error = 0; } else { + if (sc->debug) + device_printf(sc->dev, "ar71xx_wdog_watchdog_fn: disarming\n"); if (sc->armed) { ATH_WRITE_REG(AR71XX_RST_WDOG_CONTROL, RST_WDOG_ACTION_NOACTION); @@ -85,19 +94,47 @@ ar71xx_wdog_probe(device_t dev) return (0); } +static void +ar71xx_wdog_sysctl(device_t dev) +{ + struct ar71xx_wdog_softc *sc = device_get_softc(dev); + + struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->dev); + struct sysctl_oid *tree = device_get_sysctl_tree(sc->dev); + + SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, + "debug", CTLFLAG_RW, &sc->debug, 0, + "enable watchdog debugging"); + SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, + "armed", CTLFLAG_RD, &sc->armed, 0, + "whether the watchdog is armed"); + SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, + "reboot_from_watchdog", CTLFLAG_RD, &sc->reboot_from_watchdog, 0, + "whether the system rebooted from the watchdog"); +} + + static int ar71xx_wdog_attach(device_t dev) { struct ar71xx_wdog_softc *sc = device_get_softc(dev); - if (ATH_READ_REG(AR71XX_RST_WDOG_CONTROL) & RST_WDOG_LAST) + /* Initialise */ + sc->reboot_from_watchdog = 0; + sc->armed = 0; + sc->debug = 0; + + if (ATH_READ_REG(AR71XX_RST_WDOG_CONTROL) & RST_WDOG_LAST) { device_printf (dev, "Previous reset was due to watchdog timeout\n"); + sc->reboot_from_watchdog = 1; + } ATH_WRITE_REG(AR71XX_RST_WDOG_CONTROL, RST_WDOG_ACTION_NOACTION); sc->dev = dev; EVENTHANDLER_REGISTER(watchdog_list, ar71xx_wdog_watchdog_fn, sc, 0); + ar71xx_wdog_sysctl(dev); return (0); } _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"