70 lines
2.9 KiB
Plaintext
70 lines
2.9 KiB
Plaintext
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/****************************************************************************
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* boards/arm/imxrt/imxrt1170-evk/scripts/memory.ld
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/* The i.MXRT1064-EVK has 8MiB of Hyper FLASH beginning at address,
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* 0x0060:0000, Up to 512Kb of DTCM RAM beginning at 0x2000:0000, and 1MiB OCRAM
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* beginning at 0x2020:0000. Neither DTCM or SDRAM are used in this
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* configuration.
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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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/* 16MiB of QSPI */
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kflash (rx) : ORIGIN = 0x30000000, LENGTH = 1M
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uflash (rx) : ORIGIN = 0x30200000, LENGTH = 1M
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flash (rx) : ORIGIN = 0x30400000, LENGTH = 14M
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/* 1MiB of OCRAM */
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dtcm (rwx) : ORIGIN = 0x20000000, LENGTH = 256K
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kocram (rwx) : ORIGIN = 0x20240000, LENGTH = 512K
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uocram (rwx) : ORIGIN = 0x20280000, LENGTH = 512K
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}
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_ram_size = LENGTH(kocram) + LENGTH(uocram);
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