102 lines
4.9 KiB
Plaintext
102 lines
4.9 KiB
Plaintext
/****************************************************************************
|
|
* configs/stm32l4r9ai-disco/scripts/memory.ld
|
|
*
|
|
* Copyright (C) 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 STM32L4R9AI has 2048Kb of FLASH beginning at address 0x0800:0000,
|
|
* 192Kb of SRAM beginning at address 0x2000:0000, and 64Kb of SRAM2 beginning
|
|
* at address 0x1000:0000, and 384Kb of SRAM3 at address 0x2004:0000.
|
|
*
|
|
* The SRAM2 has special properties (e.g. parity check, separate power domain for
|
|
* retention in low power modes, write protection). It is also aliased at address
|
|
* 0x2003:0000 to be contiguous with SRAM1 and SRAM3.
|
|
*
|
|
* 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 128Kb of
|
|
* FLASH and 4Kb of SRAM. That is an excessive amount for the kernel which
|
|
* should fit into 64KB and, of course, can be optimized as needed (See
|
|
* also configs/stm32f4discovery/scripts/kernel-space.ld). Allowing the
|
|
* additional does permit addition debug instrumentation to be added to the
|
|
* kernel space without overflowing the partition.
|
|
*
|
|
* Alignment of the user space FLASH partition is also 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 512KB at it would have to be positioned at
|
|
* 0x08800000. 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 96KB SRAM region is as follows:
|
|
*
|
|
* 0x20000 0000: Kernel .data region. Typical size: 0.1KB
|
|
* ------- ---- Kernel .bss region. Typical size: 1.8KB
|
|
* 0x20000 0800: Kernel IDLE thread stack (approximate). Size is
|
|
* determined by CONFIG_IDLETHREAD_STACKSIZE and
|
|
* adjustments for alignment. Typical is 1KB.
|
|
* ------- ---- Padded to 4KB
|
|
* 0x20000 2000: User .data region. Size is variable.
|
|
* ------- ---- User .bss region Size is variable.
|
|
* 0x20000 4000: Beginning of kernel heap. Size determined by
|
|
* CONFIG_MM_KERNEL_HEAPSIZE.
|
|
* ------- ---- Beginning of user heap. Can vary with other settings.
|
|
* 0x20001 8000: End+1 of CPU RAM
|
|
*/
|
|
|
|
MEMORY
|
|
{
|
|
/* 1024Kb FLASH */
|
|
|
|
kflash (rx) : ORIGIN = 0x08000000, LENGTH = 128K
|
|
uflash (rx) : ORIGIN = 0x08020000, LENGTH = 128K
|
|
xflash (rx) : ORIGIN = 0x08040000, LENGTH = 768K
|
|
|
|
/* 96Kb of contiguous SRAM */
|
|
|
|
ksram (rwx) : ORIGIN = 0x20000000, LENGTH = 8K
|
|
usram (rwx) : ORIGIN = 0x20001000, LENGTH = 8K
|
|
xsram (rwx) : ORIGIN = 0x20002000, LENGTH = 80K
|
|
}
|