82 lines
3.7 KiB
Plaintext
82 lines
3.7 KiB
Plaintext
/****************************************************************************
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* boards/arm/samv7/same70-xplained/scripts/memory.ld
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*
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* Copyright (C) 2015 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 SAMe70Q21 has 2048Kb of FLASH beginning at address 0x0040:0000 and
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* 384Kb of SRAM beginining at 0x2040:0000
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*
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* When booting from FLASH, FLASH memory is aliased to address 0x0000:0000
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* where the code expects to begin execution by jumping to the entry point in
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* the 0x0400:0000 address range.
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*
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* The user space partition will be spanned with a single region of size
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* 2**n bytes. The alignment of the user-space region must be the same.
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* As a consequence, as the user-space increases in size, the alignment
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* requirement also increases. The sizes below give the largest possible
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* user address spaces (but leave far too much for the 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 to trim it
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* to fit better.
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*
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* A detailed memory map for the 384KB SRAM region is as follows:
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*
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* 0x2040 0000: Kernel .data region. Typical size: 0.1KB
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* ------ ---- Kernel .bss region. Typical size: 1.8KB
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* 0x2040 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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* 0x2042 0000: User .data region. Size is variable.
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* ------- ---- User .bss region Size is variable.
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* 0x2044 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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* 0x2046 0000: End+1 of mappable internal SRAM
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*/
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MEMORY
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{
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/* 2048KiB of internal FLASH */
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kflash (rx) : ORIGIN = 0x00400000, LENGTH = 1M
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uflash (rx) : ORIGIN = 0x00500000, LENGTH = 1M
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/* 384Kb of internal SRAM */
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ksram (rwx) : ORIGIN = 0x20400000, LENGTH = 128K
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usram (rwx) : ORIGIN = 0x20420000, LENGTH = 128K
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xsram (rwx) : ORIGIN = 0x20440000, LENGTH = 128K
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}
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