diff --git a/src/audio/copier/host_copier.h b/src/audio/copier/host_copier.h
index 08cbba43be27..fe7a98de0804 100644
--- a/src/audio/copier/host_copier.h
+++ b/src/audio/copier/host_copier.h
@@ -67,7 +67,9 @@ struct host_data {
 	uint16_t stream_tag;
 	uint16_t no_stream_position; /**< 1 means don't send stream position */
 	uint64_t total_data_processed;
-	uint8_t cont_update_posn; /**< 1 means continuous update stream position */
+	uint64_t nobytes_last_logged;	/**< uptime, when "no bytes" was last logged */
+	unsigned int n_skipped;		/**< number of "no bytes" skipped */
+	uint8_t cont_update_posn;	/**< 1 means continuous update stream position */
 
 	/* host component attributes */
 	enum comp_copy_type copy_type;	/**< Current host copy type */
diff --git a/src/audio/host-zephyr.c b/src/audio/host-zephyr.c
index 43d8686db9f8..f17a7d18119a 100644
--- a/src/audio/host-zephyr.c
+++ b/src/audio/host-zephyr.c
@@ -359,6 +359,9 @@ static void host_dma_cb(struct comp_dev *dev, size_t bytes)
 		host_common_one_shot(hd, bytes);
 }
 
+/* Minimum time between 2 consecutive "no bytes to copy" messages in milliseconds */
+#define SOF_MIN_NO_BYTES_INTERVAL_MS 20
+
 /**
  * Calculates bytes to be copied in normal mode.
  * @param dev Host component device.
@@ -403,9 +406,26 @@ static uint32_t host_get_copy_bytes_normal(struct host_data *hd, struct comp_dev
 	if (!(hd->ipc_host.feature_mask & BIT(IPC4_COPIER_FAST_MODE)))
 		dma_copy_bytes = MIN(hd->period_bytes, dma_copy_bytes);
 
-	if (!dma_copy_bytes)
-		comp_info(dev, "no bytes to copy, available samples: %d, free_samples: %d",
-			  avail_samples, free_samples);
+	bool reset_skipped = false;
+	uint64_t now = k_uptime_get();
+	uint64_t delta = now - hd->nobytes_last_logged;
+
+	if (!dma_copy_bytes) {
+		if (delta > SOF_MIN_NO_BYTES_INTERVAL_MS) {
+			hd->nobytes_last_logged = now;
+			comp_warn(dev, "no bytes to copy, available samples: %d, free_samples: %d",
+				  avail_samples, free_samples);
+			reset_skipped = true;
+		} else {
+			hd->n_skipped++;
+		}
+	}
+
+	if (hd->n_skipped && (reset_skipped || dma_copy_bytes)) {
+		comp_warn(dev, "Skipped %u no-bytes events in last %llu ms",
+			  hd->n_skipped, delta);
+		hd->n_skipped = 0;
+	}
 
 	/* dma_copy_bytes should be aligned to minimum possible chunk of
 	 * data to be copied by dma.
@@ -659,6 +679,7 @@ static struct comp_dev *host_new(const struct comp_driver *drv,
 	if (!hd)
 		goto e_data;
 
+	hd->nobytes_last_logged = k_uptime_get();
 	comp_set_drvdata(dev, hd);
 
 	ret = host_common_new(hd, dev, ipc_host, dev->ipc_config.id);
diff --git a/src/include/sof/ipc/topology.h b/src/include/sof/ipc/topology.h
index 5605c6ef9837..3503c7a407d8 100644
--- a/src/include/sof/ipc/topology.h
+++ b/src/include/sof/ipc/topology.h
@@ -49,8 +49,6 @@ typedef uint32_t ipc_comp;
 struct ipc_comp_dev;
 const struct comp_driver *ipc4_get_comp_drv(uint32_t module_id);
 struct comp_dev *ipc4_get_comp_dev(uint32_t comp_id);
-int ipc4_add_comp_dev(struct comp_dev *dev);
-const struct comp_driver *ipc4_get_drv(const void *uuid);
 int ipc4_chain_manager_create(struct ipc4_chain_dma *cdma);
 int ipc4_chain_dma_state(struct comp_dev *dev, struct ipc4_chain_dma *cdma);
 int ipc4_create_chain_dma(struct ipc *ipc, struct ipc4_chain_dma *cdma);
diff --git a/src/ipc/ipc-common.c b/src/ipc/ipc-common.c
index 8f72ac1ba91b..3c81064cb7cd 100644
--- a/src/ipc/ipc-common.c
+++ b/src/ipc/ipc-common.c
@@ -20,6 +20,7 @@
 #include <rtos/cache.h>
 #include <sof/lib/cpu.h>
 #include <sof/lib/mailbox.h>
+#include <sof/lib/memory.h>
 #include <sof/list.h>
 #include <sof/platform.h>
 #include <rtos/sof.h>
@@ -188,12 +189,14 @@ static void schedule_ipc_worker(void)
 #endif
 }
 
-void ipc_msg_send_direct(struct ipc_msg *msg, void *data)
+__cold void ipc_msg_send_direct(struct ipc_msg *msg, void *data)
 {
 	struct ipc *ipc = ipc_get();
 	k_spinlock_key_t key;
 	int ret;
 
+	assert_can_be_cold();
+
 	key = k_spin_lock(&ipc->lock);
 
 	/* copy mailbox data to message if not already copied */
@@ -280,8 +283,10 @@ void ipc_schedule_process(struct ipc *ipc)
 #endif
 }
 
-int ipc_init(struct sof *sof)
+__cold int ipc_init(struct sof *sof)
 {
+	assert_can_be_cold();
+
 	tr_dbg(&ipc_tr, "ipc_init()");
 
 	/* init ipc data */
diff --git a/src/ipc/ipc-helper.c b/src/ipc/ipc-helper.c
index 1d1b651d1c49..65910767d95e 100644
--- a/src/ipc/ipc-helper.c
+++ b/src/ipc/ipc-helper.c
@@ -21,6 +21,7 @@
 #include <rtos/cache.h>
 #include <sof/lib/cpu.h>
 #include <sof/lib/mailbox.h>
+#include <sof/lib/memory.h>
 #include <sof/list.h>
 #include <sof/platform.h>
 #include <rtos/sof.h>
@@ -37,8 +38,10 @@
 
 LOG_MODULE_DECLARE(ipc, CONFIG_SOF_LOG_LEVEL);
 
-static bool valid_ipc_buffer_desc(const struct sof_ipc_buffer *desc)
+__cold static bool valid_ipc_buffer_desc(const struct sof_ipc_buffer *desc)
 {
+	assert_can_be_cold();
+
 	if (desc->caps >= SOF_MEM_CAPS_LOWEST_INVALID)
 		return false;
 
@@ -47,10 +50,12 @@ static bool valid_ipc_buffer_desc(const struct sof_ipc_buffer *desc)
 }
 
 /* create a new component in the pipeline */
-struct comp_buffer *buffer_new(const struct sof_ipc_buffer *desc, bool is_shared)
+__cold struct comp_buffer *buffer_new(const struct sof_ipc_buffer *desc, bool is_shared)
 {
 	struct comp_buffer *buffer;
 
+	assert_can_be_cold();
+
 	tr_info(&buffer_tr, "buffer new size 0x%x id %d.%d flags 0x%x",
 		desc->size, desc->comp.pipeline_id, desc->comp.id, desc->flags);
 
@@ -75,6 +80,7 @@ struct comp_buffer *buffer_new(const struct sof_ipc_buffer *desc, bool is_shared
 	return buffer;
 }
 
+/* Called from multiple locations, including ipc_get_comp_by_ppl_id(), so cannot be cold */
 int32_t ipc_comp_pipe_id(const struct ipc_comp_dev *icd)
 {
 	switch (icd->type) {
@@ -177,9 +183,11 @@ int comp_verify_params(struct comp_dev *dev, uint32_t flag,
 }
 EXPORT_SYMBOL(comp_verify_params);
 
-int comp_buffer_connect(struct comp_dev *comp, uint32_t comp_core,
-			struct comp_buffer *buffer, uint32_t dir)
+__cold int comp_buffer_connect(struct comp_dev *comp, uint32_t comp_core,
+			       struct comp_buffer *buffer, uint32_t dir)
 {
+	assert_can_be_cold();
+
 	/* check if it's a connection between cores */
 	if (buffer->core != comp_core) {
 #if CONFIG_INCOHERENT
@@ -258,13 +266,15 @@ int ipc_pipeline_complete(struct ipc *ipc, uint32_t comp_id)
 				 ipc_ppl_sink->cd);
 }
 
-int ipc_comp_free(struct ipc *ipc, uint32_t comp_id)
+__cold int ipc_comp_free(struct ipc *ipc, uint32_t comp_id)
 {
 	struct ipc_comp_dev *icd;
 	struct comp_buffer *buffer;
 	struct comp_buffer *safe;
 	uint32_t flags;
 
+	assert_can_be_cold();
+
 	/* check whether component exists */
 	icd = ipc_get_comp_by_id(ipc, comp_id);
 	if (!icd) {
diff --git a/src/ipc/ipc4/handler.c b/src/ipc/ipc4/handler.c
index 65056289e71d..dbffb96e415d 100644
--- a/src/ipc/ipc4/handler.c
+++ b/src/ipc/ipc4/handler.c
@@ -21,6 +21,7 @@
 #include <sof/ipc/msg.h>
 #include <sof/ipc/driver.h>
 #include <sof/lib/mailbox.h>
+#include <sof/lib/memory.h>
 #include <sof/lib/pm_runtime.h>
 #include <sof/math/numbers.h>
 #include <sof/tlv.h>
@@ -131,18 +132,22 @@ static inline const struct ipc4_pipeline_set_state_data *ipc4_get_pipeline_data(
 /*
  * Global IPC Operations.
  */
-static int ipc4_new_pipeline(struct ipc4_message_request *ipc4)
+__cold static int ipc4_new_pipeline(struct ipc4_message_request *ipc4)
 {
 	struct ipc *ipc = ipc_get();
 
+	assert_can_be_cold();
+
 	return ipc_pipeline_new(ipc, (ipc_pipe_new *)ipc4);
 }
 
-static int ipc4_delete_pipeline(struct ipc4_message_request *ipc4)
+__cold static int ipc4_delete_pipeline(struct ipc4_message_request *ipc4)
 {
 	struct ipc4_pipeline_delete *pipe;
 	struct ipc *ipc = ipc_get();
 
+	assert_can_be_cold();
+
 	pipe = (struct ipc4_pipeline_delete *)ipc4;
 	tr_dbg(&ipc_tr, "ipc4 delete pipeline %x:", (uint32_t)pipe->primary.r.instance_id);
 
@@ -229,11 +234,13 @@ static int ipc4_pcm_params(struct ipc_comp_dev *pcm_dev)
 	return err;
 }
 
-static bool is_any_ppl_active(void)
+__cold static bool is_any_ppl_active(void)
 {
 	struct ipc_comp_dev *icd;
 	struct list_item *clist;
 
+	assert_can_be_cold();
+
 	list_for_item(clist, &ipc_get()->comp_list) {
 		icd = container_of(clist, struct ipc_comp_dev, list);
 		if (icd->type != COMP_TYPE_PIPELINE)
@@ -562,15 +569,14 @@ static int ipc_wait_for_compound_msg(void)
 }
 #endif
 
-const struct ipc4_pipeline_set_state_data *ipc4_get_pipeline_data_wrapper(void)
+__cold const struct ipc4_pipeline_set_state_data *ipc4_get_pipeline_data_wrapper(void)
 {
-	const struct ipc4_pipeline_set_state_data *ppl_data;
-
-	ppl_data = ipc4_get_pipeline_data();
+	assert_can_be_cold();
 
-	return ppl_data;
+	return ipc4_get_pipeline_data();
 }
 
+/* Entry point for ipc4_pipeline_trigger(), therefore cannot be cold */
 static int ipc4_set_pipeline_state(struct ipc4_message_request *ipc4)
 {
 	const struct ipc4_pipeline_set_state_data *ppl_data;
@@ -700,11 +706,13 @@ static int ipc4_set_pipeline_state(struct ipc4_message_request *ipc4)
 }
 
 #if CONFIG_LIBRARY_MANAGER
-static int ipc4_load_library(struct ipc4_message_request *ipc4)
+__cold static int ipc4_load_library(struct ipc4_message_request *ipc4)
 {
 	struct ipc4_module_load_library library;
 	int ret;
 
+	assert_can_be_cold();
+
 	library.header.dat = ipc4->primary.dat;
 
 	ret = lib_manager_load_library(library.header.r.dma_id, library.header.r.lib_id,
@@ -716,8 +724,10 @@ static int ipc4_load_library(struct ipc4_message_request *ipc4)
 }
 #endif
 
-static int ipc4_process_chain_dma(struct ipc4_message_request *ipc4)
+__cold static int ipc4_process_chain_dma(struct ipc4_message_request *ipc4)
 {
+	assert_can_be_cold();
+
 #if CONFIG_COMP_CHAIN_DMA
 	struct ipc_comp_dev *cdma_comp;
 	struct ipc *ipc = ipc_get();
@@ -771,8 +781,10 @@ static int ipc4_process_chain_dma(struct ipc4_message_request *ipc4)
 #endif
 }
 
-static int ipc4_process_ipcgtw_cmd(struct ipc4_message_request *ipc4)
+__cold static int ipc4_process_ipcgtw_cmd(struct ipc4_message_request *ipc4)
 {
+	assert_can_be_cold();
+
 #if CONFIG_IPC4_GATEWAY
 	struct ipc *ipc = ipc_get();
 	uint32_t reply_size = 0;
@@ -880,14 +892,15 @@ __cold static int ipc4_init_module_instance(struct ipc4_message_request *ipc4)
 {
 	struct ipc4_module_init_instance module_init;
 	struct comp_dev *dev;
+
+	assert_can_be_cold();
+
 	/* we only need the common header here, all we have from the IPC */
 	int ret = memcpy_s(&module_init, sizeof(module_init), ipc4, sizeof(*ipc4));
 
 	if (ret < 0)
 		return IPC4_FAILURE;
 
-	assert_can_be_cold();
-
 	tr_dbg(&ipc_tr,
 		"ipc4_init_module_instance %x : %x",
 		(uint32_t)module_init.primary.r.module_id,
@@ -908,10 +921,13 @@ __cold static int ipc4_init_module_instance(struct ipc4_message_request *ipc4)
 	return 0;
 }
 
-static int ipc4_bind_module_instance(struct ipc4_message_request *ipc4)
+__cold static int ipc4_bind_module_instance(struct ipc4_message_request *ipc4)
 {
 	struct ipc4_module_bind_unbind bu;
 	struct ipc *ipc = ipc_get();
+
+	assert_can_be_cold();
+
 	int ret = memcpy_s(&bu, sizeof(bu), ipc4, sizeof(*ipc4));
 
 	if (ret < 0)
@@ -924,10 +940,13 @@ static int ipc4_bind_module_instance(struct ipc4_message_request *ipc4)
 	return ipc_comp_connect(ipc, (ipc_pipe_comp_connect *)&bu);
 }
 
-static int ipc4_unbind_module_instance(struct ipc4_message_request *ipc4)
+__cold static int ipc4_unbind_module_instance(struct ipc4_message_request *ipc4)
 {
 	struct ipc4_module_bind_unbind bu;
 	struct ipc *ipc = ipc_get();
+
+	assert_can_be_cold();
+
 	int ret = memcpy_s(&bu, sizeof(bu), ipc4, sizeof(*ipc4));
 
 	if (ret < 0)
@@ -940,7 +959,7 @@ static int ipc4_unbind_module_instance(struct ipc4_message_request *ipc4)
 	return ipc_comp_disconnect(ipc, (ipc_pipe_comp_connect *)&bu);
 }
 
-static int  ipc4_get_vendor_config_module_instance(struct comp_dev *dev,
+__cold static int  ipc4_get_vendor_config_module_instance(struct comp_dev *dev,
 						   const struct comp_driver *drv,
 						   bool init_block,
 						   bool final_block,
@@ -952,6 +971,8 @@ static int  ipc4_get_vendor_config_module_instance(struct comp_dev *dev,
 	int ret;
 	struct ipc4_vendor_error *error;
 
+	assert_can_be_cold();
+
 	if (init_block && final_block) {
 		/* we use data_off_size as in/out,
 		 *  save value to new variable so it can be used as out size
@@ -1033,7 +1054,7 @@ static int  ipc4_get_vendor_config_module_instance(struct comp_dev *dev,
 	return IPC4_SUCCESS;
 }
 
-static int ipc4_get_large_config_module_instance(struct ipc4_message_request *ipc4)
+__cold static int ipc4_get_large_config_module_instance(struct ipc4_message_request *ipc4)
 {
 	struct ipc4_module_large_config_reply reply;
 	struct ipc4_module_large_config config;
@@ -1041,6 +1062,9 @@ static int ipc4_get_large_config_module_instance(struct ipc4_message_request *ip
 	const struct comp_driver *drv;
 	struct comp_dev *dev = NULL;
 	uint32_t data_offset;
+
+	assert_can_be_cold();
+
 	int ret = memcpy_s(&config, sizeof(config), ipc4, sizeof(*ipc4));
 
 	if (ret < 0)
@@ -1125,7 +1149,7 @@ static int ipc4_get_large_config_module_instance(struct ipc4_message_request *ip
 	return ret;
 }
 
-static int ipc4_set_vendor_config_module_instance(struct comp_dev *dev,
+__cold static int ipc4_set_vendor_config_module_instance(struct comp_dev *dev,
 						  const struct comp_driver *drv,
 						  uint32_t module_id,
 						  uint32_t instance_id,
@@ -1136,6 +1160,8 @@ static int ipc4_set_vendor_config_module_instance(struct comp_dev *dev,
 {
 	int ret;
 
+	assert_can_be_cold();
+
 	/* Old FW comment: bursted configs */
 	if (init_block && final_block) {
 		const struct sof_tlv *tlv = (struct sof_tlv *)data;
@@ -1188,11 +1214,14 @@ static int ipc4_set_vendor_config_module_instance(struct comp_dev *dev,
 					 data_off_size, data);
 }
 
-static int ipc4_set_large_config_module_instance(struct ipc4_message_request *ipc4)
+__cold static int ipc4_set_large_config_module_instance(struct ipc4_message_request *ipc4)
 {
 	struct ipc4_module_large_config config;
 	struct comp_dev *dev = NULL;
 	const struct comp_driver *drv;
+
+	assert_can_be_cold();
+
 	int ret = memcpy_s(&config, sizeof(config), ipc4, sizeof(*ipc4));
 
 	if (ret < 0)
@@ -1256,11 +1285,14 @@ static int ipc4_set_large_config_module_instance(struct ipc4_message_request *ip
 	return ret;
 }
 
-static int ipc4_delete_module_instance(struct ipc4_message_request *ipc4)
+__cold static int ipc4_delete_module_instance(struct ipc4_message_request *ipc4)
 {
 	struct ipc4_module_delete_instance module;
 	struct ipc *ipc = ipc_get();
 	uint32_t comp_id;
+
+	assert_can_be_cold();
+
 	int ret = memcpy_s(&module, sizeof(module), ipc4, sizeof(*ipc4));
 
 	if (ret < 0)
@@ -1282,10 +1314,13 @@ static int ipc4_delete_module_instance(struct ipc4_message_request *ipc4)
 }
 
 /* disable power gating on core 0 */
-static int ipc4_module_process_d0ix(struct ipc4_message_request *ipc4)
+__cold static int ipc4_module_process_d0ix(struct ipc4_message_request *ipc4)
 {
 	struct ipc4_module_set_d0ix d0ix;
 	uint32_t module_id, instance_id;
+
+	assert_can_be_cold();
+
 	int ret = memcpy_s(&d0ix, sizeof(d0ix), ipc4, sizeof(*ipc4));
 
 	if (ret < 0)
@@ -1311,12 +1346,15 @@ static int ipc4_module_process_d0ix(struct ipc4_message_request *ipc4)
 }
 
 /* enable/disable cores according to the state mask */
-static int ipc4_module_process_dx(struct ipc4_message_request *ipc4)
+__cold static int ipc4_module_process_dx(struct ipc4_message_request *ipc4)
 {
 	struct ipc4_module_set_dx dx;
 	struct ipc4_dx_state_info dx_info;
 	uint32_t module_id, instance_id;
 	uint32_t core_id;
+
+	assert_can_be_cold();
+
 	int ret = memcpy_s(&dx, sizeof(dx), ipc4, sizeof(*ipc4));
 
 	if (ret < 0)
@@ -1402,11 +1440,13 @@ static int ipc4_module_process_dx(struct ipc4_message_request *ipc4)
 	return IPC4_SUCCESS;
 }
 
-static int ipc4_process_module_message(struct ipc4_message_request *ipc4)
+__cold static int ipc4_process_module_message(struct ipc4_message_request *ipc4)
 {
 	uint32_t type;
 	int ret;
 
+	assert_can_be_cold();
+
 	type = ipc4->primary.r.type;
 
 	switch (type) {
@@ -1451,9 +1491,12 @@ static int ipc4_process_module_message(struct ipc4_message_request *ipc4)
 	return ret;
 }
 
-struct ipc_cmd_hdr *mailbox_validate(void)
+__cold struct ipc_cmd_hdr *mailbox_validate(void)
 {
 	struct ipc_cmd_hdr *hdr = ipc_get()->comp_data;
+
+	assert_can_be_cold();
+
 	return hdr;
 }
 
@@ -1479,18 +1522,22 @@ struct ipc_cmd_hdr *ipc_prepare_to_send(const struct ipc_msg *msg)
 	return &msg_data.msg_out;
 }
 
-void ipc_boot_complete_msg(struct ipc_cmd_hdr *header, uint32_t data)
+__cold void ipc_boot_complete_msg(struct ipc_cmd_hdr *header, uint32_t data)
 {
+	assert_can_be_cold();
+
 	header->pri = SOF_IPC4_FW_READY;
 	header->ext = 0;
 }
 
 #if defined(CONFIG_PM_DEVICE) && defined(CONFIG_INTEL_ADSP_IPC)
-void ipc_send_failed_power_transition_response(void)
+__cold void ipc_send_failed_power_transition_response(void)
 {
 	struct ipc4_message_request *request = ipc_from_hdr(&msg_data.msg_in);
 	struct ipc4_message_reply response;
 
+	assert_can_be_cold();
+
 	response.primary.r.status = IPC4_POWER_TRANSITION_FAILED;
 	response.primary.r.rsp = SOF_IPC4_MESSAGE_DIR_MSG_REPLY;
 	response.primary.r.msg_tgt = request->primary.r.msg_tgt;
@@ -1503,8 +1550,10 @@ void ipc_send_failed_power_transition_response(void)
 }
 #endif /* defined(CONFIG_PM_DEVICE) && defined(CONFIG_INTEL_ADSP_IPC) */
 
-void ipc_send_panic_notification(void)
+__cold void ipc_send_panic_notification(void)
 {
+	assert_can_be_cold();
+
 	msg_notify.header = SOF_IPC4_NOTIF_HEADER(SOF_IPC4_EXCEPTION_CAUGHT);
 	msg_notify.extension = cpu_get_id();
 	msg_notify.tx_size = 0;
@@ -1530,6 +1579,7 @@ static bool is_notification_queued(struct ipc_msg *msg)
 	return queued;
 }
 
+/* Called from ipc_send_buffer_status_notify(), which is currently "hot" */
 void ipc_send_buffer_status_notify(void)
 {
 	/* a single msg_notify object is used */
diff --git a/src/ipc/ipc4/helper.c b/src/ipc/ipc4/helper.c
index 10a871259b49..f727d212f179 100644
--- a/src/ipc/ipc4/helper.c
+++ b/src/ipc/ipc4/helper.c
@@ -20,6 +20,7 @@
 #include <ipc/dai.h>
 #include <sof/ipc/msg.h>
 #include <sof/lib/mailbox.h>
+#include <sof/lib/memory.h>
 #include <sof/list.h>
 #include <sof/platform.h>
 #include <sof/schedule/ll_schedule_domain.h>
@@ -60,6 +61,9 @@ LOG_MODULE_DECLARE(ipc, CONFIG_SOF_LOG_LEVEL);
 
 extern struct tr_ctx comp_tr;
 
+static const struct comp_driver *ipc4_get_drv(const void *uuid);
+static int ipc4_add_comp_dev(struct comp_dev *dev);
+
 void ipc_build_stream_posn(struct sof_ipc_stream_posn *posn, uint32_t type,
 			   uint32_t id)
 {
@@ -96,12 +100,15 @@ static const struct comp_driver *ipc4_library_get_comp_drv(char *data)
 	return ipc4_get_drv(data);
 }
 #else
-static inline char *ipc4_get_comp_new_data(void)
+__cold static inline char *ipc4_get_comp_new_data(void)
 {
+	assert_can_be_cold();
+
 	return (char *)MAILBOX_HOSTBOX_BASE;
 }
 #endif
 
+/* Only called from ipc4_init_module_instance(), which is __cold */
 __cold struct comp_dev *comp_new_ipc4(struct ipc4_module_init_instance *module_init)
 {
 	struct comp_ipc_config ipc_config;
@@ -192,6 +199,7 @@ __cold struct comp_dev *comp_new_ipc4(struct ipc4_module_init_instance *module_i
 	return dev;
 }
 
+/* Called from ipc4_set_pipeline_state(), so cannot be cold */
 struct ipc_comp_dev *ipc_get_comp_by_ppl_id(struct ipc *ipc, uint16_t type,
 					    uint32_t ppl_id,
 					    uint32_t ignore_remote)
@@ -220,12 +228,14 @@ struct ipc_comp_dev *ipc_get_comp_by_ppl_id(struct ipc *ipc, uint16_t type,
 	return NULL;
 }
 
-static int ipc4_create_pipeline(struct ipc4_pipeline_create *pipe_desc)
+__cold static int ipc4_create_pipeline(struct ipc4_pipeline_create *pipe_desc)
 {
 	struct ipc_comp_dev *ipc_pipe;
 	struct pipeline *pipe;
 	struct ipc *ipc = ipc_get();
 
+	assert_can_be_cold();
+
 	/* check whether pipeline id is already taken or in use */
 	ipc_pipe = ipc_get_pipeline_by_id(ipc, pipe_desc->primary.r.instance_id);
 	if (ipc_pipe) {
@@ -269,10 +279,13 @@ static int ipc4_create_pipeline(struct ipc4_pipeline_create *pipe_desc)
 	return IPC4_SUCCESS;
 }
 
-int ipc_pipeline_new(struct ipc *ipc, ipc_pipe_new *_pipe_desc)
+/* Only called from ipc4_new_pipeline(), which is __cold */
+__cold int ipc_pipeline_new(struct ipc *ipc, ipc_pipe_new *_pipe_desc)
 {
 	struct ipc4_pipeline_create *pipe_desc = ipc_from_pipe_new(_pipe_desc);
 
+	assert_can_be_cold();
+
 	tr_dbg(&ipc_tr, "ipc: pipeline id = %u", (uint32_t)pipe_desc->primary.r.instance_id);
 
 	/* pass IPC to target core */
@@ -282,20 +295,24 @@ int ipc_pipeline_new(struct ipc *ipc, ipc_pipe_new *_pipe_desc)
 	return ipc4_create_pipeline(pipe_desc);
 }
 
-static inline int ipc_comp_free_remote(struct comp_dev *dev)
+__cold static inline int ipc_comp_free_remote(struct comp_dev *dev)
 {
 	struct idc_msg msg = { IDC_MSG_FREE, IDC_MSG_FREE_EXT(dev->ipc_config.id),
 		dev->ipc_config.core,};
 
+	assert_can_be_cold();
+
 	return idc_send_msg(&msg, IDC_BLOCKING);
 }
 
-static int ipc_pipeline_module_free(uint32_t pipeline_id)
+__cold static int ipc_pipeline_module_free(uint32_t pipeline_id)
 {
 	struct ipc *ipc = ipc_get();
 	struct ipc_comp_dev *icd;
 	int ret;
 
+	assert_can_be_cold();
+
 	icd = ipc_get_comp_by_ppl_id(ipc, COMP_TYPE_COMPONENT, pipeline_id, IPC_COMP_ALL);
 	while (icd) {
 		struct comp_buffer *buffer;
@@ -334,11 +351,14 @@ static int ipc_pipeline_module_free(uint32_t pipeline_id)
 	return IPC4_SUCCESS;
 }
 
-int ipc_pipeline_free(struct ipc *ipc, uint32_t comp_id)
+/* Only called from ipc4_delete_pipeline(), which is __cold */
+__cold int ipc_pipeline_free(struct ipc *ipc, uint32_t comp_id)
 {
 	struct ipc_comp_dev *ipc_pipe;
 	int ret;
 
+	assert_can_be_cold();
+
 	/* check whether pipeline exists */
 	ipc_pipe = ipc_get_pipeline_by_id(ipc, comp_id);
 	if (!ipc_pipe)
@@ -368,12 +388,14 @@ int ipc_pipeline_free(struct ipc *ipc, uint32_t comp_id)
 	return IPC4_SUCCESS;
 }
 
-static struct comp_buffer *ipc4_create_buffer(struct comp_dev *src, bool is_shared,
-					      uint32_t buf_size, uint32_t src_queue,
-					      uint32_t dst_queue)
+__cold static struct comp_buffer *ipc4_create_buffer(struct comp_dev *src, bool is_shared,
+						     uint32_t buf_size, uint32_t src_queue,
+						     uint32_t dst_queue)
 {
 	struct sof_ipc_buffer ipc_buf;
 
+	assert_can_be_cold();
+
 	memset(&ipc_buf, 0, sizeof(ipc_buf));
 	ipc_buf.size = buf_size;
 	ipc_buf.comp.id = IPC4_COMP_ID(src_queue, dst_queue);
@@ -450,7 +472,8 @@ static int ll_wait_finished_on_core(struct comp_dev *dev)
 
 #endif
 
-int ipc_comp_connect(struct ipc *ipc, ipc_pipe_comp_connect *_connect)
+/* Only called from ipc4_bind_module_instance(), which is __cold */
+__cold int ipc_comp_connect(struct ipc *ipc, ipc_pipe_comp_connect *_connect)
 {
 	struct ipc4_module_bind_unbind *bu;
 	struct comp_buffer *buffer;
@@ -465,6 +488,8 @@ int ipc_comp_connect(struct ipc *ipc, ipc_pipe_comp_connect *_connect)
 	int src_id, sink_id;
 	int ret;
 
+	assert_can_be_cold();
+
 	bu = (struct ipc4_module_bind_unbind *)_connect;
 	src_id = IPC4_COMP_ID(bu->primary.r.module_id, bu->primary.r.instance_id);
 	sink_id = IPC4_COMP_ID(bu->extension.r.dst_module_id, bu->extension.r.dst_instance_id);
@@ -668,7 +693,8 @@ int ipc_comp_connect(struct ipc *ipc, ipc_pipe_comp_connect *_connect)
  * during run-time. The only way to change pipeline topology is to delete the whole
  * pipeline and create it in modified form.
  */
-int ipc_comp_disconnect(struct ipc *ipc, ipc_pipe_comp_connect *_connect)
+/* Only called from ipc4_unbind_module_instance(), which is __cold */
+__cold int ipc_comp_disconnect(struct ipc *ipc, ipc_pipe_comp_connect *_connect)
 {
 	struct ipc4_module_bind_unbind *bu;
 	struct comp_buffer *buffer = NULL;
@@ -679,6 +705,8 @@ int ipc_comp_disconnect(struct ipc *ipc, ipc_pipe_comp_connect *_connect)
 	int ret, ret1;
 	bool cross_core_unbind;
 
+	assert_can_be_cold();
+
 	bu = (struct ipc4_module_bind_unbind *)_connect;
 	src_id = IPC4_COMP_ID(bu->primary.r.module_id, bu->primary.r.instance_id);
 	sink_id = IPC4_COMP_ID(bu->extension.r.dst_module_id, bu->extension.r.dst_instance_id);
@@ -759,12 +787,15 @@ int ipc_comp_disconnect(struct ipc *ipc, ipc_pipe_comp_connect *_connect)
 }
 
 #if CONFIG_COMP_CHAIN_DMA
-int ipc4_chain_manager_create(struct ipc4_chain_dma *cdma)
+/* Only called from ipc4_process_chain_dma(), which is __cold */
+__cold int ipc4_chain_manager_create(struct ipc4_chain_dma *cdma)
 {
 	const struct sof_uuid uuid = SOF_REG_UUID(chain_dma);
 	const struct comp_driver *drv;
 	struct comp_dev *dev;
 
+	assert_can_be_cold();
+
 	drv = ipc4_get_drv(&uuid);
 	if (!drv)
 		return -EINVAL;
@@ -783,7 +814,8 @@ int ipc4_chain_manager_create(struct ipc4_chain_dma *cdma)
 	return ipc4_add_comp_dev(dev);
 }
 
-int ipc4_chain_dma_state(struct comp_dev *dev, struct ipc4_chain_dma *cdma)
+/* Only called from ipc4_process_chain_dma(), which is __cold */
+__cold int ipc4_chain_dma_state(struct comp_dev *dev, struct ipc4_chain_dma *cdma)
 {
 	const bool allocate = cdma->primary.r.allocate;
 	const bool enable = cdma->primary.r.enable;
@@ -792,6 +824,8 @@ int ipc4_chain_dma_state(struct comp_dev *dev, struct ipc4_chain_dma *cdma)
 	struct list_item *clist, *_tmp;
 	int ret;
 
+	assert_can_be_cold();
+
 	if (!dev)
 		return -EINVAL;
 
@@ -823,12 +857,14 @@ int ipc4_chain_dma_state(struct comp_dev *dev, struct ipc4_chain_dma *cdma)
 }
 #endif
 
-static int ipc4_update_comps_direction(struct ipc *ipc, uint32_t ppl_id)
+__cold static int ipc4_update_comps_direction(struct ipc *ipc, uint32_t ppl_id)
 {
 	struct ipc_comp_dev *icd;
 	struct list_item *clist;
 	struct comp_buffer *src_buf;
 
+	assert_can_be_cold();
+
 	list_for_item(clist, &ipc->comp_list) {
 		icd = container_of(clist, struct ipc_comp_dev, list);
 		if (icd->type != COMP_TYPE_COMPONENT)
@@ -904,7 +940,7 @@ int ipc4_process_on_core(uint32_t core, bool blocking)
 	return IPC4_SUCCESS;
 }
 
-const struct comp_driver *ipc4_get_drv(const void *uuid)
+__cold static const struct comp_driver *ipc4_get_drv(const void *uuid)
 {
 	const struct sof_uuid *const sof_uuid = (const struct sof_uuid *)uuid;
 	struct comp_driver_list *drivers = comp_drivers_get();
@@ -913,6 +949,8 @@ const struct comp_driver *ipc4_get_drv(const void *uuid)
 	struct comp_driver_info *info;
 	uint32_t flags;
 
+	assert_can_be_cold();
+
 	irq_local_disable(flags);
 
 	/* search driver list with UUID */
@@ -940,13 +978,22 @@ const struct comp_driver *ipc4_get_drv(const void *uuid)
 	return drv;
 }
 
-const struct comp_driver *ipc4_get_comp_drv(uint32_t module_id)
+/*
+ * Called from
+ * - ipc4_get_large_config_module_instance()
+ * - ipc4_set_large_config_module_instance()
+ * - comp_new_ipc4()
+ * all of which are __cold
+ */
+__cold const struct comp_driver *ipc4_get_comp_drv(uint32_t module_id)
 {
 	const struct sof_man_fw_desc *desc = NULL;
 	const struct comp_driver *drv;
 	const struct sof_man_module *mod;
 	uint32_t entry_index;
 
+	assert_can_be_cold();
+
 #ifdef RIMAGE_MANIFEST
 	desc = (const struct sof_man_fw_desc *)IMR_BOOT_LDR_MANIFEST_BASE;
 #else
@@ -1012,11 +1059,13 @@ struct comp_dev *ipc4_get_comp_dev(uint32_t comp_id)
 }
 EXPORT_SYMBOL(ipc4_get_comp_dev);
 
-int ipc4_add_comp_dev(struct comp_dev *dev)
+__cold static int ipc4_add_comp_dev(struct comp_dev *dev)
 {
 	struct ipc *ipc = ipc_get();
 	struct ipc_comp_dev *icd;
 
+	assert_can_be_cold();
+
 	/* check id for duplicates */
 	icd = ipc_get_comp_by_id(ipc, dev->ipc_config.id);
 	if (icd) {