78 static int debug_prolog_level_fn(debug_info_t *id,
80 static int debug_input_level_fn(debug_info_t *id, struct debug_view *view,
83 static int debug_prolog_pages_fn(debug_info_t *id,
85 static int debug_input_pages_fn(debug_info_t *id, struct debug_view *view,
88 static int debug_input_flush_fn(debug_info_t *id, struct debug_view *view,
91 static int debug_hex_ascii_format_fn(debug_info_t *id, struct debug_view *view,
93 static int debug_raw_format_fn(debug_info_t *id,
96 static int debug_raw_header_fn(debug_info_t *id, struct debug_view *view,
99 static int debug_sprintf_format_fn(debug_info_t *id, struct debug_view *view,
451 	if (act_entry->id.stck == 0LL)  in debug_format_entry()
469 	debug_info_t *id;  in debug_next_entry()  local
471 	id = p_info->debug_info_snap;  in debug_next_entry()
477 	if (!id->areas)  in debug_next_entry()
479 	p_info->act_entry += id->entry_size;  in debug_next_entry()
481 	if (p_info->act_entry > (PAGE_SIZE - id->entry_size)) {  in debug_next_entry()
485 		if ((p_info->act_page % id->pages_per_area) == 0) {  in debug_next_entry()
490 		if (p_info->act_area >= id->nr_areas)  in debug_next_entry()
701 void debug_unregister(debug_info_t *id)  in debug_unregister()  argument
703 	if (!id)  in debug_unregister()
706 	debug_info_put(id);  in debug_unregister()
715 static int debug_set_size(debug_info_t *id, int nr_areas, int pages_per_area)  in debug_set_size()  argument
721 	if (!id || (nr_areas <= 0) || (pages_per_area < 0))  in debug_set_size()
734 	spin_lock_irqsave(&id->lock, flags);  in debug_set_size()
735 	debug_areas_free(id);  in debug_set_size()
736 	id->areas = new_areas;  in debug_set_size()
737 	id->nr_areas = nr_areas;  in debug_set_size()
738 	id->pages_per_area = pages_per_area;  in debug_set_size()
739 	id->active_area = 0;  in debug_set_size()
740 	memset(id->active_entries, 0, sizeof(int)*id->nr_areas);  in debug_set_size()
741 	memset(id->active_pages, 0, sizeof(int)*id->nr_areas);  in debug_set_size()
742 	spin_unlock_irqrestore(&id->lock, flags);  in debug_set_size()
743 	pr_info("%s: set new size (%i pages)\n", id->name, pages_per_area);  in debug_set_size()
752 void debug_set_level(debug_info_t *id, int new_level)  in debug_set_level()  argument
756 	if (!id)  in debug_set_level()
758 	spin_lock_irqsave(&id->lock, flags);  in debug_set_level()
760 		id->level = DEBUG_OFF_LEVEL;  in debug_set_level()
761 		pr_info("%s: switched off\n", id->name);  in debug_set_level()
764 			id->name, new_level, 0, DEBUG_MAX_LEVEL);  in debug_set_level()
766 		id->level = new_level;  in debug_set_level()
768 	spin_unlock_irqrestore(&id->lock, flags);  in debug_set_level()
776 static inline void proceed_active_entry(debug_info_t *id)  in proceed_active_entry()  argument
778 	if ((id->active_entries[id->active_area] += id->entry_size)  in proceed_active_entry()
779 	    > (PAGE_SIZE - id->entry_size)) {  in proceed_active_entry()
780 		id->active_entries[id->active_area] = 0;  in proceed_active_entry()
781 		id->active_pages[id->active_area] =  in proceed_active_entry()
782 			(id->active_pages[id->active_area] + 1) %  in proceed_active_entry()
783 			id->pages_per_area;  in proceed_active_entry()
791 static inline void proceed_active_area(debug_info_t *id)  in proceed_active_area()  argument
793 	id->active_area++;  in proceed_active_area()
794 	id->active_area = id->active_area % id->nr_areas;  in proceed_active_area()
800 static inline debug_entry_t *get_active_entry(debug_info_t *id)  in get_active_entry()  argument
802 	return (debug_entry_t *) (((char *) id->areas[id->active_area]  in get_active_entry()
803 				   [id->active_pages[id->active_area]]) +  in get_active_entry()
804 				  id->active_entries[id->active_area]);  in get_active_entry()
812 static inline void debug_finish_entry(debug_info_t *id, debug_entry_t *active,  in debug_finish_entry()  argument
815 	active->id.stck = get_tod_clock_fast() -  in debug_finish_entry()
817 	active->id.fields.cpuid = smp_processor_id();  in debug_finish_entry()
819 	active->id.fields.exception = exception;  in debug_finish_entry()
820 	active->id.fields.level = level;  in debug_finish_entry()
821 	proceed_active_entry(id);  in debug_finish_entry()
823 		proceed_active_area(id);  in debug_finish_entry()
892 debug_entry_t *debug_event_common(debug_info_t *id, int level, const void *buf,  in debug_event_common()  argument
898 	if (!debug_active || !id->areas)  in debug_event_common()
901 		if (!spin_trylock_irqsave(&id->lock, flags))  in debug_event_common()
904 		spin_lock_irqsave(&id->lock, flags);  in debug_event_common()
907 		active = get_active_entry(id);  in debug_event_common()
908 		memcpy(DEBUG_DATA(active), buf, min(len, id->buf_size));  in debug_event_common()
909 		if (len < id->buf_size)  in debug_event_common()
910 			memset((DEBUG_DATA(active)) + len, 0, id->buf_size - len);  in debug_event_common()
911 		debug_finish_entry(id, active, level, 0);  in debug_event_common()
912 		len -= id->buf_size;  in debug_event_common()
913 		buf += id->buf_size;  in debug_event_common()
916 	spin_unlock_irqrestore(&id->lock, flags);  in debug_event_common()
925 debug_entry_t *debug_exception_common(debug_info_t *id, int level,  in debug_exception_common()  argument
931 	if (!debug_active || !id->areas)  in debug_exception_common()
934 		if (!spin_trylock_irqsave(&id->lock, flags))  in debug_exception_common()
937 		spin_lock_irqsave(&id->lock, flags);  in debug_exception_common()
940 		active = get_active_entry(id);  in debug_exception_common()
941 		memcpy(DEBUG_DATA(active), buf, min(len, id->buf_size));  in debug_exception_common()
942 		if (len < id->buf_size)  in debug_exception_common()
943 			memset((DEBUG_DATA(active)) + len, 0, id->buf_size - len);  in debug_exception_common()
944 		debug_finish_entry(id, active, level, len <= id->buf_size);  in debug_exception_common()
945 		len -= id->buf_size;  in debug_exception_common()
946 		buf += id->buf_size;  in debug_exception_common()
949 	spin_unlock_irqrestore(&id->lock, flags);  in debug_exception_common()
971 debug_entry_t *__debug_sprintf_event(debug_info_t *id, int level, char *string, ...)  in __debug_sprintf_event()  argument
979 	if (!debug_active || !id->areas)  in __debug_sprintf_event()
984 		if (!spin_trylock_irqsave(&id->lock, flags))  in __debug_sprintf_event()
987 		spin_lock_irqsave(&id->lock, flags);  in __debug_sprintf_event()
989 	active = get_active_entry(id);  in __debug_sprintf_event()
993 	for (idx = 0; idx < min(numargs, (int)(id->buf_size / sizeof(long)) - 1); idx++)  in __debug_sprintf_event()
996 	debug_finish_entry(id, active, level, 0);  in __debug_sprintf_event()
997 	spin_unlock_irqrestore(&id->lock, flags);  in __debug_sprintf_event()
1006 debug_entry_t *__debug_sprintf_exception(debug_info_t *id, int level, char *string, ...)  in __debug_sprintf_exception()  argument
1014 	if (!debug_active || !id->areas)  in __debug_sprintf_exception()
1020 		if (!spin_trylock_irqsave(&id->lock, flags))  in __debug_sprintf_exception()
1023 		spin_lock_irqsave(&id->lock, flags);  in __debug_sprintf_exception()
1025 	active = get_active_entry(id);  in __debug_sprintf_exception()
1029 	for (idx = 0; idx < min(numargs, (int)(id->buf_size / sizeof(long)) - 1); idx++)  in __debug_sprintf_exception()
1032 	debug_finish_entry(id, active, level, 1);  in __debug_sprintf_exception()
1033 	spin_unlock_irqrestore(&id->lock, flags);  in __debug_sprintf_exception()
1042 int debug_register_view(debug_info_t *id, struct debug_view *view)  in debug_register_view()  argument
1050 	if (!id)  in debug_register_view()
1052 	mode = (id->mode | S_IFREG) & ~S_IXUGO;  in debug_register_view()
1057 	pde = debugfs_create_file(view->name, mode, id->debugfs_root_entry,  in debug_register_view()
1058 				  id, &debug_file_ops);  in debug_register_view()
1061 		       "memory\n", id->name, view->name);  in debug_register_view()
1065 	spin_lock_irqsave(&id->lock, flags);  in debug_register_view()
1067 		if (!id->views[i])  in debug_register_view()
1072 		       "number of views %i\n", id->name, view->name, i);  in debug_register_view()
1075 		id->views[i] = view;  in debug_register_view()
1076 		id->debugfs_entries[i] = pde;  in debug_register_view()
1078 	spin_unlock_irqrestore(&id->lock, flags);  in debug_register_view()
1089 int debug_unregister_view(debug_info_t *id, struct debug_view *view)  in debug_unregister_view()  argument
1095 	if (!id)  in debug_unregister_view()
1097 	spin_lock_irqsave(&id->lock, flags);  in debug_unregister_view()
1099 		if (id->views[i] == view)  in debug_unregister_view()
1105 		dentry = id->debugfs_entries[i];  in debug_unregister_view()
1106 		id->views[i] = NULL;  in debug_unregister_view()
1107 		id->debugfs_entries[i] = NULL;  in debug_unregister_view()
1109 	spin_unlock_irqrestore(&id->lock, flags);  in debug_unregister_view()
1156 static int debug_prolog_pages_fn(debug_info_t *id, struct debug_view *view,  in debug_prolog_pages_fn()  argument
1159 	return sprintf(out_buf, "%i\n", id->pages_per_area);  in debug_prolog_pages_fn()
1166 static int debug_input_pages_fn(debug_info_t *id, struct debug_view *view,  in debug_input_pages_fn()  argument
1189 	rc = debug_set_size(id, id->nr_areas, new_pages);  in debug_input_pages_fn()
1205 static int debug_prolog_level_fn(debug_info_t *id, struct debug_view *view,  in debug_prolog_level_fn()  argument
1210 	if (id->level == DEBUG_OFF_LEVEL)  in debug_prolog_level_fn()
1213 		rc = sprintf(out_buf, "%i\n", id->level);  in debug_prolog_level_fn()
1220 static int debug_input_level_fn(debug_info_t *id, struct debug_view *view,  in debug_input_level_fn()  argument
1239 		debug_set_level(id, DEBUG_OFF_LEVEL);  in debug_input_level_fn()
1249 		debug_set_level(id, new_level);  in debug_input_level_fn()
1262 static void debug_flush(debug_info_t *id, int area)  in debug_flush()  argument
1267 	if (!id || !id->areas)  in debug_flush()
1269 	spin_lock_irqsave(&id->lock, flags);  in debug_flush()
1271 		id->active_area = 0;  in debug_flush()
1272 		memset(id->active_entries, 0, id->nr_areas * sizeof(int));  in debug_flush()
1273 		for (i = 0; i < id->nr_areas; i++) {  in debug_flush()
1274 			id->active_pages[i] = 0;  in debug_flush()
1275 			for (j = 0; j < id->pages_per_area; j++)  in debug_flush()
1276 				memset(id->areas[i][j], 0, PAGE_SIZE);  in debug_flush()
1278 	} else if (area >= 0 && area < id->nr_areas) {  in debug_flush()
1279 		id->active_entries[area] = 0;  in debug_flush()
1280 		id->active_pages[area] = 0;  in debug_flush()
1281 		for (i = 0; i < id->pages_per_area; i++)  in debug_flush()
1282 			memset(id->areas[area][i], 0, PAGE_SIZE);  in debug_flush()
1284 	spin_unlock_irqrestore(&id->lock, flags);  in debug_flush()
1290 static int debug_input_flush_fn(debug_info_t *id, struct debug_view *view,  in debug_input_flush_fn()  argument
1308 		debug_flush(id, DEBUG_FLUSH_ALL);  in debug_input_flush_fn()
1314 		debug_flush(id, area);  in debug_input_flush_fn()
1329 static int debug_raw_header_fn(debug_info_t *id, struct debug_view *view,  in debug_raw_header_fn()  argument
1342 static int debug_raw_format_fn(debug_info_t *id, struct debug_view *view,  in debug_raw_format_fn()  argument
1347 	rc = id->buf_size;  in debug_raw_format_fn()
1348 	memcpy(out_buf, in_buf, id->buf_size);  in debug_raw_format_fn()
1355 static int debug_hex_ascii_format_fn(debug_info_t *id, struct debug_view *view,  in debug_hex_ascii_format_fn()  argument
1360 	for (i = 0; i < id->buf_size; i++)  in debug_hex_ascii_format_fn()
1363 	for (i = 0; i < id->buf_size; i++) {  in debug_hex_ascii_format_fn()
1378 int debug_dflt_header_fn(debug_info_t *id, struct debug_view *view,  in debug_dflt_header_fn()  argument
1387 	level = entry->id.fields.level;  in debug_dflt_header_fn()
1389 	sec = (entry->id.stck >> 12) + base - (TOD_UNIX_EPOCH >> 12);  in debug_dflt_header_fn()
1392 	if (entry->id.fields.exception)  in debug_dflt_header_fn()
1399 		      entry->id.fields.cpuid, (void *)caller);  in debug_dflt_header_fn()
1411 static int debug_sprintf_format_fn(debug_info_t *id, struct debug_view *view,  in debug_sprintf_format_fn()  argument
1418 	num_longs = id->buf_size / sizeof(long);  in debug_sprintf_format_fn()