Function resource_list_add

freebsd/kern/subr_bus.c:3193–3219

* @brief Add or modify a resource entry. * * If an existing entry exists with the same type and rid, it will be * modified using the given values of @p start, @p end and @p * count. If no entry exists, a new one will be created using the * given values. The resource list entry that matches is then returned. * * @param rl the resource list to edit * @param type the resource entry type (e

 * @param count		XXX end-start+1
 */
struct resource_list_entry *
resource_list_add(struct resource_list *rl, int type, int rid,
    rman_res_t start, rman_res_t end, rman_res_t count)
{
	struct resource_list_entry *rle;

	rle = resource_list_find(rl, type, rid);
	if (!rle) {
		rle = malloc(sizeof(struct resource_list_entry), M_BUS,
		    M_NOWAIT);
		if (!rle)
			panic("resource_list_add: can't record entry");
		STAILQ_INSERT_TAIL(rl, rle, link);
		rle->type = type;
		rle->rid = rid;
		rle->res = NULL;
		rle->flags = 0;
	}

	if (rle->res)
		panic("resource_list_add: resource entry is busy");

	rle->start = start;
	rle->end = end;
	rle->count = count;
	return (rle);
}

/**
 * @brief Determine if a resource entry is busy.