diff --git a/arch/arm/src/imx6/imx_memorymap.h b/arch/arm/src/imx6/imx_memorymap.h
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+++ b/arch/arm/src/imx6/imx_memorymap.h
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+/************************************************************************************
+ * arch/arm/src/imx6/imx_memorymap.h
+ *
+ *   Copyright (C) 2016 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+#ifndef __ARCH_ARM_SRC_IMX6_IMX_MEMORYMAP_H
+#define __ARCH_ARM_SRC_IMX6_IMX_MEMORYMAP_H
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+#include <arch/imx6/chip.h>
+
+#include "mmu.h"
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+
+/* The vectors are, by default, positioned at the beginning of the text
+ * section.  Under what conditions do we have to remap the these vectors?
+ *
+ * 1) If we are using high vectors (CONFIG_ARCH_LOWVECTORS=n).  In this case,
+ *    the vectors will lie at virtual address 0xffff:000 and we will need
+ *    to a) copy the vectors to another location, and b) map the vectors
+ *    to that address, and
+ *
+ *    For the case of CONFIG_ARCH_LOWVECTORS=y, defined.  The i.MX6 boot-up
+ *    logic will map the beginning of the boot memory to address 0x0000:0000
+ *    using both the MMU and the AXI matrix REMAP register.  No vector copy
+ *    is required because the vectors are position at the beginning of the
+ *    boot memory at link time and no additional MMU mapping required.
+ *
+ * 2) We are not using a ROM page table.  We cannot set any custom mappings in
+ *    the case and the build must conform to the ROM page table properties
+ */
+
+#if !defined(CONFIG_ARCH_LOWVECTORS) && defined(CONFIG_ARCH_ROMPGTABLE)
+#  error High vector remap cannot be performed if we are using a ROM page table
+#endif
+
+/* If SDRAM needs to be configured, then it will be configured twice:  It
+ * will first be configured to a temporary state to support low-level
+ * initialization.  After the SDRAM has been fully initialized, SRAM be used
+ * to set the SDRM in its final, fully cache-able state.
+ */
+
+#undef NEED_SDRAM_CONFIGURATION
+#if defined(CONFIG_IMX_MMDC) && !defined(CONFIG_IMX_BOOT_SDRAM)
+#  define NEED_SDRAM_CONFIGURATION 1
+#endif
+
+#undef NEED_SDRAM_MAPPING
+#undef NEED_SDRAM_REMAPPING
+#if defined(NEED_SDRAM_CONFIGURATION) && !defined(CONFIG_ARCH_ROMPGTABLE)
+#  define NEED_SDRAM_MAPPING 1
+#  define NEED_SDRAM_REMAPPING 1
+#endif
+
+/************************************************************************************
+ * Public Data
+ ************************************************************************************/
+
+ /* This table describes how to map a set of 1Mb pages to space the physical
+ * address space of the i.MX6.
+ */
+
+#ifndef CONFIG_ARCH_ROMPGTABLE
+extern const struct section_mapping_s g_section_mapping[];
+extern const size_t g_num_mappings;
+#endif
+
+/* i.MX6 External SDRAM Memory.  Final configuration.  The SDRAM was
+ * configured in a temporary state to support low-level ininitialization.
+ * After the SDRAM has been fully initialized, this structure is used to
+ * set the SDRM in its final, fully cache-able state.
+ */
+
+#ifdef NEED_SDRAM_REMAPPING
+extern const struct section_mapping_s g_operational_mapping[];
+extern const size_t g_num_opmappings;
+#endif
+
+#endif /* __ARCH_ARM_SRC_IMX6_IMX_MEMORYMAP_H */