*/
-#ifndef _SIM_EVENTS_H_
-#define _SIM_EVENTS_H_
+#ifndef SIM_EVENTS_H
+#define SIM_EVENTS_H
-typedef void event_handler(void *data);
+/* Notes:
-typedef struct _event_entry event_entry;
-struct _event_entry {
- void *data;
- event_handler *handler;
- signed64 time_of_event;
- event_entry *next;
-};
+ When scheduling an event, the a delta of zero/one refers to the
+ timeline as follows:
+
+ epoch 0|1 1|2 2|3 3|
+ **queue**|--insn--|*queue*|--insn--|*queue*|--insn--|*queue*|
+ | ^ ^ | ^ ^
+ `- +0 ------------ +1 --.. `----- +0 ------------- +1 --..
+
+ When the queue is initialized, the time is set to zero with a
+ number of initialization events scheduled. Consequently, as also
+ illustrated above, the event queue should be processed before the
+ first instruction. That instruction being executed during tick 1.
+
+ The simulator main loop may take a form similar to:
+
+ if (halt-/restart-setjmp)
+ {
+
+ .... // Determine who should go next
+ last-cpu-nr = get-last-cpu-nr (sd);
+ next-cpu-nr = get-next-cpu-nr (sd);
+ events-were-last? = (last-cpu-nr >= nr-cpus);
+ events-were-next? = (next-cpu-nr >= nr-cpus);
+
+ .... // process any outstanding events
+ sim_events_preprocess (sd, events-were-last?, events-were-next?);
+ if (events-were-next)
+ next-cpu-nr = 0;
+
+ .... // prime main loop
-typedef struct _event_queue event_queue;
-struct _event_queue {
- int processing;
- event_entry *queue;
- event_entry *volatile held;
- event_entry *volatile *volatile held_end;
+ while (1)
+ {
+ .... // model one insn of next-cpu-nr .. nr-cpus
+ if (sim_events_tick (sd))
+ sim_events_process (sd);
+ next-cpu-nr = 0
+ }
+ }
+
+ NB. In the above pseudo code it is assumed that any cpu-nr >=
+ nr-cpus is a marker for the event queue. */
+
+
+typedef void sim_event_handler(SIM_DESC sd, void *data);
+
+typedef struct _sim_event sim_event;
+
+typedef struct _sim_events sim_events;
+struct _sim_events {
+ int nr_ticks_to_process;
+ sim_event *queue;
+ sim_event *watchpoints;
+ sim_event *watchedpoints;
+ sim_event *free_list;
+ /* flag additional work needed */
+ volatile int work_pending;
+ /* the asynchronous event queue */
+#ifndef MAX_NR_SIGNAL_SIM_EVENTS
+#define MAX_NR_SIGNAL_SIM_EVENTS 2
+#endif
+ sim_event *held;
+ volatile int nr_held;
+ /* timekeeping */
+ unsigned long elapsed_wallclock;
+ SIM_ELAPSED_TIME resume_wallclock;
signed64 time_of_event;
- signed64 time_from_event;
+ int time_from_event;
int trace;
};
-typedef struct event_entry *event_entry_tag;
-/* Initialization */
+/* Install the "events" module. */
-INLINE_SIM_EVENTS\
-(void) event_queue_init
-(engine *system);
+extern SIM_RC sim_events_install (SIM_DESC sd);
-/* Tracing level */
+/* Schedule an event DELTA_TIME ticks into the future */
-INLINE_SIM_EVENTS\
-(void) event_queue_trace
-(engine *system,
- int level);
+extern sim_event *sim_events_schedule
+(SIM_DESC sd,
+ signed64 delta_time,
+ sim_event_handler *handler,
+ void *data);
+
+extern sim_event *sim_events_schedule_tracef
+(SIM_DESC sd,
+ signed64 delta_time,
+ sim_event_handler *handler,
+ void *data,
+ const char *fmt,
+ ...) __attribute__ ((format (printf, 5, 6)));
+extern sim_event *sim_events_schedule_vtracef
+(SIM_DESC sd,
+ signed64 delta_time,
+ sim_event_handler *handler,
+ void *data,
+ const char *fmt,
+ va_list ap);
-/* (de)Schedule things to happen in the future. */
-INLINE_SIM_EVENTS\
-(event_entry_tag) event_queue_schedule
-(engine *system,
+extern void sim_events_schedule_after_signal
+(SIM_DESC sd,
signed64 delta_time,
- event_handler *handler,
+ sim_event_handler *handler,
void *data);
-INLINE_SIM_EVENTS\
-(event_entry_tag) event_queue_schedule_after_signal
-(engine *system,
- signed64 delta_time,
- event_handler *handler,
+/* NB: signal level events can't have trace strings as malloc isn't
+ available */
+
+
+
+/* Schedule an event milli-seconds from NOW. The exact interpretation
+ of wallclock is host dependant. */
+
+extern sim_event *sim_events_watch_clock
+(SIM_DESC sd,
+ unsigned delta_ms_time,
+ sim_event_handler *handler,
void *data);
+
+/* Schedule an event when the test (IS_WITHIN == (VAL >= LB && VAL <=
+ UB)) of the NR_BYTES value at HOST_ADDR with BYTE_ORDER endian is
+ true.
+
+ HOST_ADDR: pointer into the host address space.
+ BYTE_ORDER: 0 - host endian; BIG_ENDIAN; LITTLE_ENDIAN */
+
+extern sim_event *sim_events_watch_sim
+(SIM_DESC sd,
+ void *host_addr,
+ int nr_bytes,
+ int byte_order,
+ int is_within,
+ unsigned64 lb,
+ unsigned64 ub,
+ sim_event_handler *handler,
+ void *data);
+
+
+/* Schedule an event when the test (IS_WITHIN == (VAL >= LB && VAL <=
+ UB)) of the NR_BYTES value at CORE_ADDR in BYTE_ORDER endian is
+ true.
+
+ CORE_ADDR/MAP: pointer into the target address space.
+ BYTE_ORDER: 0 - current target endian; BIG_ENDIAN; LITTLE_ENDIAN */
+
+extern sim_event *sim_events_watch_core
+(SIM_DESC sd,
+ address_word core_addr,
+ unsigned map,
+ int nr_bytes,
+ int byte_order,
+ int is_within,
+ unsigned64 lb,
+ unsigned64 ub,
+ sim_event_handler *handler,
+ void *data);
+
+/* Deschedule the specified event */
+
+extern void sim_events_deschedule
+(SIM_DESC sd,
+ sim_event *event_to_remove);
+
+
+/* Prepare for main simulator loop. Ensure that the next thing to do
+ is not event processing.
+
+ If the simulator halted part way through event processing then both
+ EVENTS_WERE_LAST and EVENTS_WERE_NEXT shall be true.
+
+ If the simulator halted after processing the last cpu, then only
+ EVENTS_WERE_NEXT shall be true. */
+
+INLINE_SIM_EVENTS\
+(void) sim_events_preprocess
+(SIM_DESC sd,
+ int events_were_last,
+ int events_were_next);
+
+
+/* Progress time.
+
+ Separated into two parts so that the main loop can save its context
+ before the event queue is processed. When sim_events_tick*()
+ returns true, any simulation context should be saved and
+ sim_events_process() called.
+
+ SIM_EVENTS_TICK advances the clock by 1 cycle.
+
+ SIM_EVENTS_TICKN advances the clock by N cycles (1..MAXINT). */
+
+INLINE_SIM_EVENTS\
+(int) sim_events_tick
+(SIM_DESC sd);
+
INLINE_SIM_EVENTS\
-(void) event_queue_deschedule
-(engine *system,
- event_entry_tag event_to_remove);
+(int) sim_events_tickn
+(SIM_DESC sd,
+ int n);
+INLINE_SIM_EVENTS\
+(void) sim_events_process
+(SIM_DESC sd);
-/* progress time. Broken into two parts so that if something is
- pending, the caller has a chance to save any cached state */
+
+/* Advance the clock by an additional SLIP cycles at the next call to
+ sim_events_tick*(). For multiple calls, the effect is
+ accumulative. */
INLINE_SIM_EVENTS\
-(int) event_queue_tick
-(engine *system);
+(void) sim_events_slip
+(SIM_DESC sd,
+ int slip);
+
+/* Progress time such that an event shall occure upon the next call to
+ sim_events tick */
+
+#if 0
INLINE_SIM_EVENTS\
-(void) event_queue_process
-(engine *system);
+(void) sim_events_timewarp
+(SIM_DESC sd);
+#endif
-/* local concept of time */
+/* local concept of elapsed target time */
INLINE_SIM_EVENTS\
-(signed64) event_queue_time
-(engine *system);
+(signed64) sim_events_time
+(SIM_DESC sd);
+/* local concept of elapsed host time (milliseconds) */
+
+INLINE_SIM_EVENTS\
+(unsigned long) sim_events_elapsed_time
+(SIM_DESC sd);
+
#endif
projects / deliverable / binutils-gdb.git / blobdiff