69 lines
3.2 KiB
Plaintext
69 lines
3.2 KiB
Plaintext
/****************************************************************************
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* boards/arm/stm32l4/stm32l4r9ai-disco/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 STM32L4R9AI has 2048Kb of FLASH beginning at address 0x0800:0000,
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* 192Kb of SRAM beginning at address 0x2000:0000, and 64Kb of SRAM2 beginning
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* at address 0x1000:0000, and 384Kb of SRAM3 at address 0x2004:0000.
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*
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* The SRAM2 has special properties (e.g. parity check, separate power domain for
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* retention in low power modes, write protection). It is also aliased at address
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* 0x2003:0000 to be contiguous with SRAM1 and SRAM3.
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*
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* When booting from FLASH, FLASH memory is aliased to address 0x0000:0000 where
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* the code expects to begin execution by jumping to the entry point in the
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* 0x0800:0000 address range.
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*
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* For MPU support, the kernel-mode NuttX section is assumed to be 128Kb of
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* FLASH and 16Kb of SRAM. That is an excessive amount for the kernel which
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* should fit into 64KB and, of course, can be optimized as needed (See
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* also boards/arm/stm32l4/stm32l4r9ai-disco/scripts/kernel-space.ld). Allowing the
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* additional does permit addition debug instrumentation to be added to the
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* kernel space without overflowing the partition.
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*
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* Alignment of the user space FLASH partition is also a critical factor:
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* The user space FLASH partition will be spanned with a single region of
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* size 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.
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*
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* This alignment requirement means that the largest user space FLASH region
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* you can have will be 512KB at it would have to be positioned at
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* 0x08800000. If you change this address, don't forget to change the
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* CONFIG_NUTTX_USERSPACE configuration setting to match and to modify
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* the check in kernel/userspace.c.
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*/
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MEMORY
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{
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/* 2048Kb FLASH */
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kflash (rx) : ORIGIN = 0x08000000, LENGTH = 128K
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uflash (rx) : ORIGIN = 0x08020000, LENGTH = 128K
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xflash (rx) : ORIGIN = 0x08040000, LENGTH = 1792K
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/* 640Kb of contiguous SRAM */
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ksram (rwx) : ORIGIN = 0x20000000, LENGTH = 16K
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usram (rwx) : ORIGIN = 0x20004000, LENGTH = 16K
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xsram (rwx) : ORIGIN = 0x20008000, LENGTH = 192K + 64K - 32K
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sram3 (rwx) : ORIGIN = 0x20040000, LENGTH = 384K
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}
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