82b86f9c4a
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5779 42af7a65-404d-4744-a932-0658087f49c3
98 lines
4.4 KiB
Plaintext
98 lines
4.4 KiB
Plaintext
/****************************************************************************
|
|
* configs/sam3u-ek/scripts/user-space.ld
|
|
*
|
|
* Copyright (C) 2011, 2013 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.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/* The AT91SAM3U-4 has 256KB of FLASH beginning at address 0x0008:0000,
|
|
* 32KB of SRAM beginning at address 0x2000:0000, and 16Kb of SRAM beginning
|
|
* at address 0x2008:000 (used only for heap). When booting from FLASH,
|
|
* FLASH memory is aliased to address 0x0000:0000 where the code expects to
|
|
* begin execution by jumping to the entry point in the 0x0800:0000 address
|
|
* range.
|
|
*
|
|
* For MPU support, the kernel-mode NuttX section is assumed to be 64KB of
|
|
* FLASH and 4KB of SRAM. That, of course, can be optimized as needed (See
|
|
* also configs/open1788/scripts/kernel-space.ld).
|
|
*
|
|
* Alignment of the user space FLASH partition is a critical factor: The
|
|
* user space FLASH partition will be spanned with a single region of size
|
|
* 2**n bytes. The alignment of the user-space region must be the same. As
|
|
* a consequence, as the user-space increases in size, the alignmment
|
|
* requirement also increases.
|
|
*
|
|
* This alignment requirement means that the largest user space FLASH region
|
|
* you can have will be 128KB at it would have to be positioned at
|
|
* 0x000a0000. If you change this address, don't forget to change the
|
|
* CONFIG_NUTTX_USERSPACE configuration setting to match and to modify
|
|
* the check in kernel/userspace.c.
|
|
*
|
|
* For the same reasons, the maximum size of the SRAM mapping is limited to
|
|
* 4KB. Both of these alignment limitations could be reduced by using
|
|
* multiple regions to map the FLASH/SDRAM range or perhaps with some
|
|
* clever use of subregions.
|
|
*
|
|
* A detailed memory map for the 16Kb SRAM region is as follows:
|
|
*
|
|
* 0x20000 0000: Kernel .data region. Typical size: 0.1KB
|
|
* ------- ---- Kernel .bss region. Typical size: 1.8KB
|
|
* ------- ---- Kernel IDLE thread stack (approximate). Size is
|
|
* determined by CONFIG_IDLETHREAD_STACKSIZE and
|
|
* adjustments for alignment. Typical is 1KB.
|
|
* ------- ---- Padded to 4KB
|
|
* 0x20000 1000: User .data region. Size is variable.
|
|
* ------- ---- User .bss region Size is variable.
|
|
* ------- ---- Beginning of kernel heap. Size determined by
|
|
* CONFIG_MM_KERNEL_HEAPSIZE.
|
|
* ------- ---- Beginning of user heap. Can vary with other settings.
|
|
* 0x20000 8000: End+1 of CPU RAM
|
|
*/
|
|
|
|
MEMORY
|
|
{
|
|
/* 256Kb FLASH */
|
|
|
|
kflash (rx) : ORIGIN = 0x00080000, LENGTH = 64K
|
|
uflash (rx) : ORIGIN = 0x00090000, LENGTH = 64K
|
|
xflash (rx) : ORIGIN = 0x000a0000, LENGTH = 128K
|
|
|
|
/* 32Kb SRAM */
|
|
|
|
ksram1 (rwx) : ORIGIN = 0x20000000, LENGTH = 4K
|
|
usram1 (rwx) : ORIGIN = 0x20001000, LENGTH = 4K
|
|
xsram1 (rwx) : ORIGIN = 0x20001000, LENGTH = 24K
|
|
|
|
/* 16Kb SRAM */
|
|
|
|
sram2 (rwx) : ORIGIN = 0x20080000, LENGTH = 16K
|
|
}
|