diff options
| -rw-r--r-- | core/opal.c | 40 | ||||
| -rw-r--r-- | include/opal.h | 2 |
2 files changed, 41 insertions, 1 deletions
diff --git a/core/opal.c b/core/opal.c index f6bd00d..ef19927 100644 --- a/core/opal.c +++ b/core/opal.c @@ -41,6 +41,11 @@ static u8 opal_num_args[OPAL_LAST+1]; /* OPAL anchor node */ struct dt_node *opal_node; +/* mask of dynamic vs fixed events; opal_allocate_dynamic_event will + * only allocate from this range */ +static const uint64_t opal_dynamic_events_mask = 0xffffffff00000000ul; +static uint64_t opal_dynamic_events; + extern uint32_t attn_trigger; extern uint32_t hir_trigger; @@ -149,9 +154,10 @@ void add_opal_node(void) memcons_add_properties(); } +static struct lock evt_lock = LOCK_UNLOCKED; + void opal_update_pending_evt(uint64_t evt_mask, uint64_t evt_values) { - static struct lock evt_lock = LOCK_UNLOCKED; uint64_t new_evts; /* XXX FIXME: Use atomics instead ??? Or caller locks (con_lock ?) */ @@ -180,6 +186,38 @@ void opal_update_pending_evt(uint64_t evt_mask, uint64_t evt_values) unlock(&evt_lock); } +uint64_t opal_dynamic_event_alloc(void) +{ + uint64_t new_event; + int n; + + lock(&evt_lock); + + /* Create the event mask. This set-bit will be within the event mask + * iff there are free events, or out of the mask if there are no free + * events. If opal_dynamic_events is all ones (ie, all events are + * dynamic, and allocated), then ilog2 will return -1, and we'll have a + * zero mask. + */ + n = ilog2(~opal_dynamic_events); + new_event = 1ull << n; + + /* Ensure we're still within the allocatable dynamic events range */ + if (new_event & opal_dynamic_events_mask) + opal_dynamic_events |= new_event; + else + new_event = 0; + + unlock(&evt_lock); + return new_event; +} + +void opal_dynamic_event_free(uint64_t event) +{ + lock(&evt_lock); + opal_dynamic_events &= ~event; + unlock(&evt_lock); +} static uint64_t opal_test_func(uint64_t arg) { diff --git a/include/opal.h b/include/opal.h index 347e171..8a833df 100644 --- a/include/opal.h +++ b/include/opal.h @@ -921,6 +921,8 @@ extern struct dt_node *opal_node; extern void opal_table_init(void); extern void opal_update_pending_evt(uint64_t evt_mask, uint64_t evt_values); +uint64_t opal_dynamic_event_alloc(void); +void opal_dynamic_event_free(uint64_t event); extern void add_opal_node(void); #define opal_register(token, func, nargs) \ |