83 lines
3.6 KiB
Plaintext
83 lines
3.6 KiB
Plaintext
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/****************************************************************************
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* configs/simxrt1050-evk/scripts/memory.ld
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*
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* Copyright (C) 2018 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/* The i.MXRT1050-EVK has 64Mb of Hyper FLASH beginning at address,
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* 0x0060:0000, 512Kb of DTCM RAM beginning at 0x2000:0000, and 512Kb OCRAM
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* beginning at 0x2020:0000. Neither DTCM or SDRAM are used in this
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* configuratin.
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*
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* The user and kernel space partitions will be spanned with a single
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* region of size 2**n bytes. As a consequence, as the partitions increase
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* in size, the alignment requirement also increases. The sizes below give
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* the largest possible user address spaces (but leave far too much for the
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* OS).
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*
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* The solution to this wasted memory is to (1) use more than one region to
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* span the user spaces, or (2) poke holes in a larger region (via sub-
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* regions) to trim it to fit better.
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*
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* A detailed memory map for the 512KB SRAM region is as follows:
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*
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* 0x2020 0000: Kernel .data region. Typical size: 0.1KB
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* ------ ---- Kernel .bss region. Typical size: 1.8KB
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* 0x2020 0800: Kernel IDLE thread stack (approximate). Size is
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* determined by CONFIG_IDLETHREAD_STACKSIZE and
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* adjustments for alignment. Typical is 1KB.
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* ------ ---- Padded to 4KB
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* 0x2040 0000: User .data region. Size is variable.
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* ------- ---- User .bss region Size is variable.
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* 0x2042 0000: Beginning of kernel heap. Size determined by
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* CONFIG_MM_KERNEL_HEAPSIZE.
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* ------ ---- Beginning of user heap. Can vary with other settings.
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* 0x2080 0000: End+1 of mappable OCRAM
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*/
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/* Specify the memory areas */
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MEMORY
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{
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/* 64Mb of HyperFLASH */
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kflash (rx) : ORIGIN = 0x60000000, LENGTH = 1M
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uflash (rx) : ORIGIN = 0x60200000, LENGTH = 1M
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flash (rx) : ORIGIN = 0x60400000, LENGTH = 62M
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/* 512Kb of OCRAM */
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dtcm (rwx) : ORIGIN = 0x20000000, LENGTH = 512K
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kocram (rwx) : ORIGIN = 0x20200000, LENGTH = 256K
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uocram (rwx) : ORIGIN = 0x20240000, LENGTH = 256K
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}
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