diff options
Diffstat (limited to 'extras/mini-os/kernel.c')
| -rw-r--r-- | extras/mini-os/kernel.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/extras/mini-os/kernel.c b/extras/mini-os/kernel.c index a8dfe6d985..378ce1202f 100644 --- a/extras/mini-os/kernel.c +++ b/extras/mini-os/kernel.c @@ -48,6 +48,10 @@ uint8_t xen_features[XENFEAT_NR_SUBMAPS * 32]; +unsigned int do_shutdown = 0; +unsigned int shutdown_reason; +DECLARE_WAIT_QUEUE_HEAD(shutdown_queue); + void setup_xen_features(void) { xen_feature_info_t fi; @@ -64,6 +68,36 @@ void setup_xen_features(void) } } +static void shutdown_thread(void *p) +{ + const char *path = "control/shutdown"; + const char *token = path; + xenbus_event_queue events = NULL; + char *shutdown, *err; + xenbus_watch_path_token(XBT_NIL, path, token, &events); + while ((err = xenbus_read(XBT_NIL, path, &shutdown)) != NULL) + { + free(err); + xenbus_wait_for_watch(&events); + } + xenbus_unwatch_path_token(XBT_NIL, path, token); + xenbus_write(XBT_NIL, path, ""); + printk("Shutting down (%s)\n", shutdown); + + if (!strcmp(shutdown, "poweroff")) + shutdown_reason = SHUTDOWN_poweroff; + else if (!strcmp(shutdown, "reboot")) + shutdown_reason = SHUTDOWN_reboot; + else + /* Unknown */ + shutdown_reason = SHUTDOWN_crash; + wmb(); + do_shutdown = 1; + wmb(); + wake_up(&shutdown_queue); +} + + /* This should be overridden by the application we are linked against. */ __attribute__((weak)) int app_main(start_info_t *si) { @@ -126,6 +160,8 @@ void start_kernel(start_info_t *si) /* Init XenBus */ init_xenbus(); + create_thread("shutdown", shutdown_thread, NULL); + /* Call (possibly overridden) app_main() */ app_main(&start_info); |