diff --git a/boot/zephyr/CMakeLists.txt b/boot/zephyr/CMakeLists.txt
index 3737157..121e584 100644
--- a/boot/zephyr/CMakeLists.txt
+++ b/boot/zephyr/CMakeLists.txt
@@ -93,19 +93,30 @@
 # Generic bootutil sources and includes.
 zephyr_library_include_directories(${BOOT_DIR}/bootutil/include)
 zephyr_library_sources(
+  ${BOOT_DIR}/bootutil/src/image_validate.c
+  ${BOOT_DIR}/bootutil/src/tlv.c
+  ${BOOT_DIR}/bootutil/src/encrypted.c
+  ${BOOT_DIR}/bootutil/src/image_rsa.c
+  ${BOOT_DIR}/bootutil/src/image_ec256.c
+  ${BOOT_DIR}/bootutil/src/image_ed25519.c
+  )
+
+if(CONFIG_SINGLE_IMAGE_DFU)
+zephyr_library_sources(
+  ${BOOT_DIR}/zephyr/single_loader.c
+  )
+zephyr_library_include_directories(${BOOT_DIR}/bootutil/src)
+else()
+zephyr_library_sources(
   ${BOOT_DIR}/bootutil/src/loader.c
   ${BOOT_DIR}/bootutil/src/swap_misc.c
   ${BOOT_DIR}/bootutil/src/swap_scratch.c
   ${BOOT_DIR}/bootutil/src/swap_move.c
   ${BOOT_DIR}/bootutil/src/bootutil_misc.c
-  ${BOOT_DIR}/bootutil/src/image_validate.c
-  ${BOOT_DIR}/bootutil/src/encrypted.c
-  ${BOOT_DIR}/bootutil/src/image_rsa.c
-  ${BOOT_DIR}/bootutil/src/image_ec256.c
-  ${BOOT_DIR}/bootutil/src/image_ed25519.c
   ${BOOT_DIR}/bootutil/src/caps.c
-  ${BOOT_DIR}/bootutil/src/tlv.c
   )
+endif()
+
 
 if(CONFIG_BOOT_SIGNATURE_TYPE_ECDSA_P256 OR CONFIG_BOOT_ENCRYPT_EC256)
   zephyr_library_include_directories(
diff --git a/boot/zephyr/flash_map_extended.c b/boot/zephyr/flash_map_extended.c
index 4723af1..c77f96c 100644
--- a/boot/zephyr/flash_map_extended.c
+++ b/boot/zephyr/flash_map_extended.c
@@ -57,10 +57,12 @@
 {
     switch (slot) {
     case 0: return FLASH_AREA_IMAGE_PRIMARY(image_index);
+#if !defined(CONFIG_SINGLE_IMAGE_DFU)
     case 1: return FLASH_AREA_IMAGE_SECONDARY(image_index);
 #if !defined(CONFIG_BOOT_SWAP_USING_MOVE)
     case 2: return FLASH_AREA_IMAGE_SCRATCH;
 #endif
+#endif
     }
 
     return -EINVAL; /* flash_area_open will fail on that */
@@ -76,9 +78,11 @@
     if (area_id == FLASH_AREA_IMAGE_PRIMARY(image_index)) {
         return 0;
     }
+#if !defined(CONFIG_SINGLE_IMAGE_DFU)
     if (area_id == FLASH_AREA_IMAGE_SECONDARY(image_index)) {
         return 1;
     }
+#endif
 
     BOOT_LOG_ERR("invalid flash area ID");
     return -1;
diff --git a/boot/zephyr/include/mcuboot_config/mcuboot_config.h b/boot/zephyr/include/mcuboot_config/mcuboot_config.h
index a642088..044ec3d 100644
--- a/boot/zephyr/include/mcuboot_config/mcuboot_config.h
+++ b/boot/zephyr/include/mcuboot_config/mcuboot_config.h
@@ -58,18 +58,30 @@
 #define MCUBOOT_OVERWRITE_ONLY_FAST
 #endif
 
+#ifdef CONFIG_SINGLE_IMAGE_DFU
+#define MCUBOOT_SINGLE_IMAGE_DFU 1
+#else
+
 #ifdef CONFIG_BOOT_SWAP_USING_MOVE
 #define MCUBOOT_SWAP_USING_MOVE 1
 #endif
 
-#ifdef CONFIG_LOG
-#define MCUBOOT_HAVE_LOGGING 1
+#ifdef CONFIG_UPDATEABLE_IMAGE_NUMBER
+#define MCUBOOT_IMAGE_NUMBER    CONFIG_UPDATEABLE_IMAGE_NUMBER
+#else
+#define MCUBOOT_IMAGE_NUMBER    1
 #endif
 
 #ifdef CONFIG_BOOT_SWAP_SAVE_ENCTLV
 #define MCUBOOT_SWAP_SAVE_ENCTLV 1
 #endif
 
+#endif /* CONFIG_SINGLE_IMAGE_DFU */
+
+#ifdef CONFIG_LOG
+#define MCUBOOT_HAVE_LOGGING 1
+#endif
+
 #ifdef CONFIG_BOOT_ENCRYPT_RSA
 #define MCUBOOT_ENC_IMAGES
 #define MCUBOOT_ENCRYPT_RSA
@@ -93,12 +105,6 @@
 #define MCUBOOT_USE_BENCH 1
 #endif
 
-#ifdef CONFIG_UPDATEABLE_IMAGE_NUMBER
-#define MCUBOOT_IMAGE_NUMBER    CONFIG_UPDATEABLE_IMAGE_NUMBER
-#else
-#define MCUBOOT_IMAGE_NUMBER    1
-#endif
-
 #ifdef CONFIG_MCUBOOT_DOWNGRADE_PREVENTION
 #define MCUBOOT_DOWNGRADE_PREVENTION 1
 #endif
diff --git a/boot/zephyr/include/sysflash/sysflash.h b/boot/zephyr/include/sysflash/sysflash.h
index 66dce1d..f651779 100644
--- a/boot/zephyr/include/sysflash/sysflash.h
+++ b/boot/zephyr/include/sysflash/sysflash.h
@@ -6,6 +6,8 @@
 #include <devicetree.h>
 #include <mcuboot_config/mcuboot_config.h>
 
+#ifndef CONFIG_SINGLE_IMAGE_DFU
+
 #if (MCUBOOT_IMAGE_NUMBER == 1)
 /*
  * NOTE: the definition below returns the same values for true/false on
@@ -41,4 +43,16 @@
 #define FLASH_AREA_IMAGE_SCRATCH    FLASH_AREA_ID(image_scratch)
 #endif
 
+#else /* CONFIG_SINGLE_IMAGE_DFU */
+
+#define FLASH_AREA_IMAGE_PRIMARY(x)	FLASH_AREA_ID(image_0)
+#define FLASH_AREA_IMAGE_SECONDARY(x)	FLASH_AREA_ID(image_0)
+/* NOTE: Scratch parition is not used by single image DFU but some of
+ * functions in common files reference it, so the definitions has been
+ * provided to allow compilation of common units.
+ */
+#define FLASH_AREA_IMAGE_SCRATCH	0
+
+#endif /* CONFIG_SINGLE_IMAGE_DFU */
+
 #endif /* __SYSFLASH_H__ */
diff --git a/boot/zephyr/include/target.h b/boot/zephyr/include/target.h
index 2e0f5fd..d585b9c 100644
--- a/boot/zephyr/include/target.h
+++ b/boot/zephyr/include/target.h
@@ -37,8 +37,8 @@
     (defined(CONFIG_XTENSA) && !defined(JEDEC_SPI_NOR_0_LABEL)) || \
     !defined(FLASH_ALIGN) ||                  \
     !(FLASH_AREA_LABEL_EXISTS(image_0)) || \
-    !(FLASH_AREA_LABEL_EXISTS(image_1)) || \
-    (!defined(CONFIG_BOOT_SWAP_USING_MOVE) && !(FLASH_AREA_LABEL_EXISTS(image_scratch)))
+    !(FLASH_AREA_LABEL_EXISTS(image_1) || CONFIG_SINGLE_IMAGE_DFU) || \
+    (!defined(CONFIG_BOOT_SWAP_USING_MOVE) && !FLASH_AREA_LABEL_EXISTS(image_scratch) && !defined(CONFIG_SINGLE_IMAGE_DFU))
 #error "Target support is incomplete; cannot build mcuboot."
 #endif
 
diff --git a/boot/zephyr/single_loader.c b/boot/zephyr/single_loader.c
new file mode 100644
index 0000000..258d38b
--- /dev/null
+++ b/boot/zephyr/single_loader.c
@@ -0,0 +1,126 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Copyright (c) 2020 Nordic Semiconductor ASA
+ */
+
+#include <assert.h>
+#include "bootutil/image.h"
+#include "bootutil_priv.h"
+#include "bootutil/bootutil_log.h"
+
+#include "mcuboot_config/mcuboot_config.h"
+
+MCUBOOT_LOG_MODULE_DECLARE(mcuboot);
+
+/* Variables passed outside of unit via poiters. */
+static const struct flash_area *_fa_p;
+static struct image_header _hdr = { 0 };
+
+#ifdef MCUBOOT_VALIDATE_PRIMARY_SLOT
+/**
+ * Validate hash of a primary boot image.
+ *
+ * @param[in]	fa_p	flash area pointer
+ * @param[in]	hdr	boot image header pointer
+ *
+ * @return		0 on success, error code otherwise
+ */
+inline static int
+boot_image_validate(const struct flash_area *fa_p,
+                    struct image_header *hdr)
+{
+    static uint8_t tmpbuf[BOOT_TMPBUF_SZ];
+
+    /* NOTE: The enc-state pointer may be NULL only because when there is
+     * only one image (BOOT_IMAGE_NUMBER == 1), the code that uses the
+     * pointer, within bootutil_img_validate and down the call path,
+     * is excluded from compilation.
+     */
+    /* Validate hash */
+    if (bootutil_img_validate(NULL, 0, hdr, fa_p, tmpbuf,
+                              BOOT_TMPBUF_SZ, NULL, 0, NULL)) {
+        return BOOT_EBADIMAGE;
+    }
+
+    return 0;
+}
+#endif /* MCUBOOT_VALIDATE_PRIMARY_SLOT */
+
+
+/**
+ * Attempts to load image header from flash; verifies flash header fields.
+ *
+ * @param[in]	fa_p	flash area pointer
+ * @param[out] 	hdr	buffer for image header
+ *
+ * @return		0 on success, error code otherwise
+ */
+static int
+boot_image_load_header(const struct flash_area *fa_p,
+                       struct image_header *hdr)
+{
+    uint32_t size;
+    int rc = flash_area_read(fa_p, 0, hdr, sizeof *hdr);
+
+    if (rc != 0) {
+        rc = BOOT_EFLASH;
+        BOOT_LOG_ERR("Failed reading image header");
+	return BOOT_EFLASH;
+    }
+
+    if (hdr->ih_magic != IMAGE_MAGIC) {
+        BOOT_LOG_ERR("Bad image magic 0x%lx", (unsigned long)hdr->ih_magic);
+
+        return BOOT_EBADIMAGE;
+    }
+
+    if (hdr->ih_flags & IMAGE_F_NON_BOOTABLE) {
+        BOOT_LOG_ERR("Image not bootable");
+
+        return BOOT_EBADIMAGE;
+    }
+
+    if (!boot_u32_safe_add(&size, hdr->ih_img_size, hdr->ih_hdr_size) ||
+        size >= fa_p->fa_size) {
+        return BOOT_EBADIMAGE;
+    }
+
+    return 0;
+}
+
+
+/**
+ * Gather information on image and prepare for booting.
+ *
+ * @parami[out]	rsp	Parameters for booting image, on success
+ *
+ * @return		0 on success, error code otherwise.
+ */
+int
+boot_go(struct boot_rsp *rsp)
+{
+    int rc = -1;
+
+    rc = flash_area_open(FLASH_AREA_IMAGE_PRIMARY(0), &_fa_p);
+    assert(rc == 0);
+
+    rc = boot_image_load_header(_fa_p, &_hdr);
+    if (rc != 0)
+        goto out;
+
+#ifdef MCUBOOT_VALIDATE_PRIMARY_SLOT
+    rc = boot_image_validate(_fa_p, &_hdr);
+    if (rc != 0) {
+        goto out;
+    }
+#endif /* MCUBOOT_VALIDATE_PRIMARY_SLOT */
+
+    rsp->br_flash_dev_id = _fa_p->fa_device_id;
+    rsp->br_image_off = _fa_p->fa_off;
+    rsp->br_hdr = &_hdr;
+
+out:
+    flash_area_close(_fa_p);
+    return rc;
+}