diff --git a/src/Makefile.am b/src/Makefile.am
index 5f0d846..a44906b 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -12,7 +12,7 @@
 			  rspro/libosmo-asn1-rspro.la
 libosmo_rspro_la_SOURCES = rspro_util.c
 
-noinst_HEADERS = debug.h bankd.h client.h internal.h rspro_util.h \
+noinst_HEADERS = debug.h bankd.h client.h internal.h rspro_util.h slotmap.h \
 		 simtrace2/apdu_dispatch.h \
 		 simtrace2/libusb_util.h \
 		 simtrace2/simtrace2-discovery.h \
@@ -25,7 +25,7 @@
 pcsc_test_LDADD = $(OSMOCORE_LIBS) \
 		  $(PCSC_LIBS) libosmo-rspro.la
 
-remsim_bankd_SOURCES = bankd_slotmap.c bankd_main.c bankd_pcsc.c debug.c
+remsim_bankd_SOURCES = slotmap.c bankd_main.c bankd_pcsc.c debug.c
 remsim_bankd_LDADD = $(OSMOCORE_LIBS) $(OSMOGSM_LIBS) \
 		     $(PCSC_LIBS) libosmo-rspro.la -lcsv
 
diff --git a/src/bankd.h b/src/bankd.h
index 86b75cc..cd97772 100644
--- a/src/bankd.h
+++ b/src/bankd.h
@@ -13,60 +13,11 @@
 #include <osmocom/core/linuxlist.h>
 
 #include "rspro_util.h"
+#include "slotmap.h"
 #include "debug.h"
 
 struct bankd;
 
-struct bank_slot {
-	uint16_t bank_id;
-	uint16_t slot_nr;
-};
-
-static inline bool bank_slot_equals(const struct bank_slot *a, const struct bank_slot *b)
-{
-	if (a->bank_id == b->bank_id && a->slot_nr == b->slot_nr)
-		return true;
-	else
-		return false;
-}
-
-struct client_slot {
-	uint16_t client_id;
-	uint16_t slot_nr;
-};
-
-static inline bool client_slot_equals(const struct client_slot *a, const struct client_slot *b)
-{
-	if (a->client_id == b->client_id && a->slot_nr == b->slot_nr)
-		return true;
-	else
-		return false;
-}
-
-/* slot mappings are created / removed by the server */
-struct bankd_slot_mapping {
-	/* global lits of bankd slot mappings */
-	struct llist_head list;
-	/* slot on bank side */
-	struct bank_slot bank;
-	/* slot on client side */
-	struct client_slot client;
-};
-
-/* thread-safe lookup of map by client:slot */
-struct bankd_slot_mapping *bankd_slotmap_by_client(struct bankd *bankd,
-						   const struct client_slot *client);
-
-/* thread-safe lookup of map by bank:slot */
-struct bankd_slot_mapping *bankd_slotmap_by_bank(struct bankd *bankd, const struct bank_slot *bank);
-
-/* thread-safe creating of a new bank<->client map */
-int bankd_slotmap_add(struct bankd *bankd, const struct bank_slot *bank,
-		      const struct client_slot *client);
-
-/* thread-safe removal of a bank<->client map */
-void bankd_slotmap_del(struct bankd *bankd, struct bankd_slot_mapping *map);
-
 enum bankd_worker_state {
 	/* just started*/
 	BW_ST_INIT,
@@ -138,9 +89,8 @@
 	/* TCP socket at which we are listening */
 	int accept_fd;
 
-	/* list of slit mappings. only ever modified in main thread! */
-	struct llist_head slot_mappings;
-	pthread_rwlock_t slot_mappings_rwlock;
+	/* list of slot mappings. only ever modified in main thread! */
+	struct slotmaps *slotmaps;
 
 	/* list of bankd_workers. accessed/modified by multiple threads; protected by mutex */
 	struct llist_head workers;
diff --git a/src/bankd_main.c b/src/bankd_main.c
index fde03cd..ed225a9 100644
--- a/src/bankd_main.c
+++ b/src/bankd_main.c
@@ -47,8 +47,7 @@
 	asn_debug = 0;
 
 	/* intialize members of 'bankd' */
-	INIT_LLIST_HEAD(&bankd->slot_mappings);
-	pthread_rwlock_init(&bankd->slot_mappings_rwlock, NULL);
+	bankd->slotmaps = slotmap_init(bankd);
 	INIT_LLIST_HEAD(&bankd->workers);
 	pthread_mutex_init(&bankd->workers_mutex, NULL);
 
@@ -71,7 +70,7 @@
 		int i;
 		for (i = 0; i < 5; i++) {
 			bs.slot_nr = cs.slot_nr = i;
-			bankd_slotmap_add(bankd, &bs, &cs);
+			slotmap_add(bankd->slotmaps, &bs, &cs);
 		}
 	}
 }
@@ -304,9 +303,9 @@
 /* attempt to obtain slot-map */
 static int worker_try_slotmap(struct bankd_worker *worker)
 {
-	struct bankd_slot_mapping *slmap;
+	struct slot_mapping *slmap;
 
-	slmap = bankd_slotmap_by_client(worker->bankd, &worker->client.clslot);
+	slmap = slotmap_by_client(worker->bankd->slotmaps, &worker->client.clslot);
 	if (!slmap) {
 		LOGW(worker, "No slotmap (yet) for client C(%u:%u)\n",
 			worker->client.clslot.client_id, worker->client.clslot.slot_nr);
diff --git a/src/bankd_slotmap.c b/src/bankd_slotmap.c
deleted file mode 100644
index 116fd69..0000000
--- a/src/bankd_slotmap.c
+++ /dev/null
@@ -1,100 +0,0 @@
-
-#include <stdint.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <errno.h>
-
-#include <pthread.h>
-
-#include <talloc.h>
-
-#include <osmocom/core/linuxlist.h>
-
-#include "bankd.h"
-
-/* thread-safe lookup of map by client:slot */
-struct bankd_slot_mapping *bankd_slotmap_by_client(struct bankd *bankd, const struct client_slot *client)
-{
-	struct bankd_slot_mapping *map;
-
-	pthread_rwlock_rdlock(&bankd->slot_mappings_rwlock);
-	llist_for_each_entry(map, &bankd->slot_mappings, list) {
-		if (client_slot_equals(&map->client, client)) {
-			pthread_rwlock_unlock(&bankd->slot_mappings_rwlock);
-			return map;
-		}
-	}
-	pthread_rwlock_unlock(&bankd->slot_mappings_rwlock);
-	return NULL;
-}
-
-/* thread-safe lookup of map by bank:slot */
-struct bankd_slot_mapping *bankd_slotmap_by_bank(struct bankd *bankd, const struct bank_slot *bank)
-{
-	struct bankd_slot_mapping *map;
-
-	pthread_rwlock_rdlock(&bankd->slot_mappings_rwlock);
-	llist_for_each_entry(map, &bankd->slot_mappings, list) {
-		if (bank_slot_equals(&map->bank, bank)) {
-			pthread_rwlock_unlock(&bankd->slot_mappings_rwlock);
-			return map;
-		}
-	}
-	pthread_rwlock_unlock(&bankd->slot_mappings_rwlock);
-	return NULL;
-
-}
-
-/* thread-safe creating of a new bank<->client map */
-int bankd_slotmap_add(struct bankd *bankd, const struct bank_slot *bank, const struct client_slot *client)
-{
-	struct bankd_slot_mapping *map;
-
-	/* We assume a single thread (main thread) will ever update the mappings,
-	 * and hence we don't have any races by first grabbing + releasing the read
-	 * lock twice before grabbing the writelock below */
-
-	map = bankd_slotmap_by_bank(bankd, bank);
-	if (map) {
-		fprintf(stderr, "BANKD %u:%u already in use, cannot add new map\n",
-			bank->bank_id, bank->slot_nr);
-		return -EBUSY;
-	}
-
-	map = bankd_slotmap_by_client(bankd, client);
-	if (map) {
-		fprintf(stderr, "CLIENT %u:%u already in use, cannot add new map\n",
-			client->client_id, client->slot_nr);
-		return -EBUSY;
-	}
-
-	/* allocate new mapping and add to list of mappings */
-	map = talloc_zero(bankd, struct bankd_slot_mapping);
-	if (!map)
-		return -ENOMEM;
-
-	map->bank = *bank;
-	map->client = *client;
-
-	pthread_rwlock_wrlock(&bankd->slot_mappings_rwlock);
-	llist_add_tail(&map->list, &bankd->slot_mappings);
-	pthread_rwlock_unlock(&bankd->slot_mappings_rwlock);
-
-	printf("Added Slot Map C(%u:%u) <-> B(%u:%u)\n",
-		map->client.client_id, map->client.slot_nr, map->bank.bank_id, map->bank.slot_nr);
-
-	return 0;
-}
-
-/* thread-safe removal of a bank<->client map */
-void bankd_slotmap_del(struct bankd *bankd, struct bankd_slot_mapping *map)
-{
-	printf("Deleting Slot Map C(%u:%u) <-> B(%u:%u)\n",
-		map->client.client_id, map->client.slot_nr, map->bank.bank_id, map->bank.slot_nr);
-
-	pthread_rwlock_wrlock(&bankd->slot_mappings_rwlock);
-	llist_del(&map->list);
-	pthread_rwlock_unlock(&bankd->slot_mappings_rwlock);
-
-	talloc_free(map);
-}
diff --git a/src/slotmap.c b/src/slotmap.c
new file mode 100644
index 0000000..303f5fd
--- /dev/null
+++ b/src/slotmap.c
@@ -0,0 +1,110 @@
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+
+#include <pthread.h>
+
+#include <talloc.h>
+
+#include <osmocom/core/linuxlist.h>
+
+#include "slotmap.h"
+
+/* thread-safe lookup of map by client:slot */
+struct slot_mapping *slotmap_by_client(struct slotmaps *maps, const struct client_slot *client)
+{
+	struct slot_mapping *map;
+
+	pthread_rwlock_rdlock(&maps->rwlock);
+	llist_for_each_entry(map, &maps->mappings, list) {
+		if (client_slot_equals(&map->client, client)) {
+			pthread_rwlock_unlock(&maps->rwlock);
+			return map;
+		}
+	}
+	pthread_rwlock_unlock(&maps->rwlock);
+	return NULL;
+}
+
+/* thread-safe lookup of map by bank:slot */
+struct slot_mapping *slotmap_by_bank(struct slotmaps *maps, const struct bank_slot *bank)
+{
+	struct slot_mapping *map;
+
+	pthread_rwlock_rdlock(&maps->rwlock);
+	llist_for_each_entry(map, &maps->mappings, list) {
+		if (bank_slot_equals(&map->bank, bank)) {
+			pthread_rwlock_unlock(&maps->rwlock);
+			return map;
+		}
+	}
+	pthread_rwlock_unlock(&maps->rwlock);
+	return NULL;
+
+}
+
+/* thread-safe creating of a new bank<->client map */
+int slotmap_add(struct slotmaps *maps, const struct bank_slot *bank, const struct client_slot *client)
+{
+	struct slot_mapping *map;
+
+	/* We assume a single thread (main thread) will ever update the mappings,
+	 * and hence we don't have any races by first grabbing + releasing the read
+	 * lock twice before grabbing the writelock below */
+
+	map = slotmap_by_bank(maps, bank);
+	if (map) {
+		fprintf(stderr, "BANKD %u:%u already in use, cannot add new map\n",
+			bank->bank_id, bank->slot_nr);
+		return -EBUSY;
+	}
+
+	map = slotmap_by_client(maps, client);
+	if (map) {
+		fprintf(stderr, "CLIENT %u:%u already in use, cannot add new map\n",
+			client->client_id, client->slot_nr);
+		return -EBUSY;
+	}
+
+	/* allocate new mapping and add to list of mappings */
+	map = talloc_zero(maps, struct slot_mapping);
+	if (!map)
+		return -ENOMEM;
+
+	map->bank = *bank;
+	map->client = *client;
+
+	pthread_rwlock_wrlock(&maps->rwlock);
+	llist_add_tail(&map->list, &maps->mappings);
+	pthread_rwlock_unlock(&maps->rwlock);
+
+	printf("Added Slot Map C(%u:%u) <-> B(%u:%u)\n",
+		map->client.client_id, map->client.slot_nr, map->bank.bank_id, map->bank.slot_nr);
+
+	return 0;
+}
+
+/* thread-safe removal of a bank<->client map */
+void slotmap_del(struct slotmaps *maps, struct slot_mapping *map)
+{
+	printf("Deleting Slot Map C(%u:%u) <-> B(%u:%u)\n",
+		map->client.client_id, map->client.slot_nr, map->bank.bank_id, map->bank.slot_nr);
+
+	pthread_rwlock_wrlock(&maps->rwlock);
+	llist_del(&map->list);
+	pthread_rwlock_unlock(&maps->rwlock);
+
+	talloc_free(map);
+}
+
+struct slotmaps *slotmap_init(void *ctx)
+{
+	struct slotmaps *sm = talloc_zero(ctx, struct slotmaps);
+
+	INIT_LLIST_HEAD(&sm->mappings);
+	pthread_rwlock_init(&sm->rwlock, NULL);
+
+	return sm;
+}
diff --git a/src/slotmap.h b/src/slotmap.h
new file mode 100644
index 0000000..92eb6f4
--- /dev/null
+++ b/src/slotmap.h
@@ -0,0 +1,62 @@
+#pragma once
+#include <stdint.h>
+#include <stdbool.h>
+#include <pthread.h>
+#include <osmocom/core/linuxlist.h>
+
+struct bank_slot {
+	uint16_t bank_id;
+	uint16_t slot_nr;
+};
+
+static inline bool bank_slot_equals(const struct bank_slot *a, const struct bank_slot *b)
+{
+	if (a->bank_id == b->bank_id && a->slot_nr == b->slot_nr)
+		return true;
+	else
+		return false;
+}
+
+struct client_slot {
+	uint16_t client_id;
+	uint16_t slot_nr;
+};
+
+static inline bool client_slot_equals(const struct client_slot *a, const struct client_slot *b)
+{
+	if (a->client_id == b->client_id && a->slot_nr == b->slot_nr)
+		return true;
+	else
+		return false;
+}
+
+/* slot mappings are created / removed by the server */
+struct slot_mapping {
+	/* global lits of bankd slot mappings */
+	struct llist_head list;
+	/* slot on bank side */
+	struct bank_slot bank;
+	/* slot on client side */
+	struct client_slot client;
+};
+
+/* collection of slot mappings */
+struct slotmaps {
+	struct llist_head mappings;
+	pthread_rwlock_t rwlock;
+};
+
+/* thread-safe lookup of map by client:slot */
+struct slot_mapping *slotmap_by_client(struct slotmaps *maps, const struct client_slot *client);
+
+/* thread-safe lookup of map by bank:slot */
+struct slot_mapping *slotmap_by_bank(struct slotmaps *maps, const struct bank_slot *bank);
+
+/* thread-safe creating of a new bank<->client map */
+int slotmap_add(struct slotmaps *maps, const struct bank_slot *bank, const struct client_slot *client);
+
+/* thread-safe removal of a bank<->client map */
+void slotmap_del(struct slotmaps *maps, struct slot_mapping *map);
+
+/* initialize the entire map collection */
+struct slotmaps *slotmap_init(void *ctx);