diff --git a/include/fwu.h b/include/fwu.h
index 7d38cb5856..c7b932bc0b 100644
--- a/include/fwu.h
+++ b/include/fwu.h
@@ -345,4 +345,17 @@ int fwu_plat_get_update_index(uint *update_idx);
  *
  */
 void fwu_plat_get_bootidx(uint *boot_idx);
+
+/**
+ * fwu_update_checks_pass() - Check if FWU update can be done
+ *
+ * Check if the FWU update can be executed. The updates are
+ * allowed only when the platform is not in Trial State and
+ * the boot time checks have passed
+ *
+ * Return: 1 if OK, 0 on error
+ *
+ */
+u8 fwu_update_checks_pass(void);
+
 #endif /* _FWU_H_ */
diff --git a/lib/fwu_updates/fwu.c b/lib/fwu_updates/fwu.c
index e782dc0176..2016a6d2c1 100644
--- a/lib/fwu_updates/fwu.c
+++ b/lib/fwu_updates/fwu.c
@@ -4,10 +4,19 @@
  */
 
 #include <dm.h>
+#include <efi.h>
 #include <efi_loader.h>
+#include <efi_variable.h>
+#include <event.h>
 #include <fwu.h>
 #include <fwu_mdata.h>
-#include <log.h>
+#include <malloc.h>
+
+#include <linux/errno.h>
+#include <linux/types.h>
+
+static u8 trial_state;
+static u8 boottime_check;
 
 #include <linux/errno.h>
 #include <linux/types.h>
@@ -44,6 +53,110 @@ static int fwu_get_dev_mdata(struct udevice **dev, struct fwu_mdata *mdata)
 	return ret;
 }
 
+static int trial_counter_update(u16 *trial_state_ctr)
+{
+	bool delete;
+	u32 var_attr;
+	efi_status_t status;
+	efi_uintn_t var_size;
+
+	delete = !trial_state_ctr ? true : false;
+	var_size = !trial_state_ctr ? 0 : (efi_uintn_t)sizeof(*trial_state_ctr);
+	var_attr = !trial_state_ctr ? 0 : EFI_VARIABLE_NON_VOLATILE |
+		EFI_VARIABLE_BOOTSERVICE_ACCESS;
+	status = efi_set_variable_int(u"TrialStateCtr",
+				      &efi_global_variable_guid,
+				      var_attr,
+				      var_size, trial_state_ctr, false);
+
+	if ((delete && (status != EFI_NOT_FOUND &&
+			status != EFI_SUCCESS)) ||
+	    (!delete && status != EFI_SUCCESS))
+		return -1;
+
+	return 0;
+}
+
+static int in_trial_state(struct fwu_mdata *mdata)
+{
+	u32 i, active_bank;
+	struct fwu_image_entry *img_entry;
+	struct fwu_image_bank_info *img_bank_info;
+
+	active_bank = mdata->active_index;
+	img_entry = &mdata->img_entry[0];
+	for (i = 0; i < CONFIG_FWU_NUM_IMAGES_PER_BANK; i++) {
+		img_bank_info = &img_entry[i].img_bank_info[active_bank];
+		if (!img_bank_info->accepted) {
+			return 1;
+		}
+	}
+
+	return 0;
+}
+
+static int fwu_trial_state_check(void)
+{
+	int ret;
+	struct udevice *dev;
+	efi_status_t status;
+	efi_uintn_t var_size;
+	u16 trial_state_ctr;
+	struct fwu_mdata mdata = { 0 };
+
+	ret = fwu_get_dev_mdata(&dev, &mdata);
+	if (ret)
+		return ret;
+
+	trial_state = in_trial_state(&mdata);
+	if (trial_state) {
+		var_size = (efi_uintn_t)sizeof(trial_state_ctr);
+		log_info("System booting in Trial State\n");
+		status = efi_get_variable_int(u"TrialStateCtr",
+					      &efi_global_variable_guid,
+					      NULL,
+					      &var_size, &trial_state_ctr,
+					      NULL);
+		if (status != EFI_SUCCESS) {
+			log_err("Unable to read TrialStateCtr variable\n");
+			ret = -1;
+			goto out;
+		}
+
+		++trial_state_ctr;
+		if (trial_state_ctr > CONFIG_FWU_TRIAL_STATE_CNT) {
+			log_info("Trial State count exceeded. Revert back to previous_active_index\n");
+			ret = fwu_revert_boot_index();
+			if (ret) {
+				log_err("Unable to revert active_index\n");
+				goto out;
+			}
+
+			/* Delete the TrialStateCtr variable */
+			ret = trial_counter_update(NULL);
+			if (ret) {
+				log_err("Unable to delete TrialStateCtr variable\n");
+				goto out;
+			}
+		} else {
+			ret = trial_counter_update(&trial_state_ctr);
+			if (ret) {
+				log_err("Unable to increment TrialStateCtr variable\n");
+				goto out;
+			}
+		}
+	} else {
+		/* Delete the variable */
+		ret = trial_counter_update(NULL);
+		if (ret) {
+			log_err("Unable to delete TrialStateCtr variable\n");
+		}
+	}
+
+out:
+	return ret;
+}
+
 static int fwu_get_image_type_id(u8 *image_index, efi_guid_t *image_type_id)
 {
 	u8 index;
@@ -494,3 +607,69 @@ __weak int fwu_plat_get_update_index(uint *update_idx)
 
 	return ret;
 }
+
+/**
+ * fwu_update_checks_pass() - Check if FWU update can be done
+ *
+ * Check if the FWU update can be executed. The updates are
+ * allowed only when the platform is not in Trial State and
+ * the boot time checks have passed
+ *
+ * Return: 1 if OK, 0 on error
+ *
+ */
+u8 fwu_update_checks_pass(void)
+{
+	return !trial_state && boottime_check;
+}
+
+static int fwu_boottime_checks(void *ctx, struct event *event)
+{
+	int ret;
+	u32 boot_idx, active_idx;
+
+	ret = fwu_check_mdata_validity();
+	if (ret)
+		return 0;
+
+	/*
+	 * Get the Boot Index, i.e. the bank from
+	 * which the platform has booted. This value
+	 * gets passed from the ealier stage bootloader
+	 * which booted u-boot, e.g. tf-a. If the
+	 * boot index is not the same as the
+	 * active_index read from the FWU metadata,
+	 * update the active_index.
+	 */
+	fwu_plat_get_bootidx(&boot_idx);
+	if (boot_idx >= CONFIG_FWU_NUM_BANKS) {
+		log_err("Received incorrect value of boot_index\n");
+		return 0;
+	}
+
+	ret = fwu_get_active_index(&active_idx);
+	if (ret) {
+		log_err("Unable to read active_index\n");
+		return 0;
+	}
+
+	if (boot_idx != active_idx) {
+		log_info("Boot idx %u is not matching active idx %u, changing active_idx\n",
+			 boot_idx, active_idx);
+		ret = fwu_set_active_index(boot_idx);
+		if (!ret)
+			boottime_check = 1;
+
+		return 0;
+	}
+
+	if (efi_init_obj_list() != EFI_SUCCESS)
+		return 0;
+
+	ret = fwu_trial_state_check();
+	if (!ret)
+		boottime_check = 1;
+
+	return 0;
+}
+EVENT_SPY(EVT_MAIN_LOOP, fwu_boottime_checks);
