/**************************************************************************** * boards/arm/imxrt/imxrt1060-evk/scripts/memory.ld * * Copyright (C) 2018 Gregory Nutt. All rights reserved. * Authors: Gregory Nutt * David Sidrane * * 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. * ****************************************************************************/ /* The i.MXRT1060-EVK has 8MiB of Hyper FLASH beginning at address, * 0x0060:0000, Upto 512Kb of DTCM RAM beginning at 0x2000:0000, and 1MiB OCRAM * beginning at 0x2020:0000. Neither DTCM or SDRAM are used in this * configuratin. * * The user and kernel space partitions will be spanned with a single * region of size 2**n bytes. As a consequence, as the partitions increase * in size, the alignment requirement also increases. The sizes below give * the largest possible user address spaces (but leave far too much for the * OS). * * The solution to this wasted memory is to (1) use more than one region to * span the user spaces, or (2) poke holes in a larger region (via sub- * regions) to trim it to fit better. * * A detailed memory map for the 512KB SRAM region is as follows: * * 0x2020 0000: Kernel .data region. Typical size: 0.1KB * ------ ---- Kernel .bss region. Typical size: 1.8KB * 0x2020 0800: Kernel IDLE thread stack (approximate). Size is * determined by CONFIG_IDLETHREAD_STACKSIZE and * adjustments for alignment. Typical is 1KB. * ------ ---- Padded to 4KB * 0x2040 0000: User .data region. Size is variable. * ------- ---- User .bss region Size is variable. * 0x2042 0000: Beginning of kernel heap. Size determined by * CONFIG_MM_KERNEL_HEAPSIZE. * ------ ---- Beginning of user heap. Can vary with other settings. * 0x2080 0000: End+1 of mappable OCRAM */ /* Specify the memory areas */ MEMORY { /* 8MiB of HyperFLASH */ kflash (rx) : ORIGIN = 0x60000000, LENGTH = 1M uflash (rx) : ORIGIN = 0x60200000, LENGTH = 1M flash (rx) : ORIGIN = 0x60400000, LENGTH = 6M /* 1MiB of OCRAM */ dtcm (rwx) : ORIGIN = 0x20000000, LENGTH = 512K kocram (rwx) : ORIGIN = 0x20200000, LENGTH = 512K uocram (rwx) : ORIGIN = 0x20240000, LENGTH = 512K }