New STM32 driver

source/portable/NetworkInterface/STM32/STM32F767ZITX_FLASH.ld

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+/*
+******************************************************************************
+**
+** @file : LinkerScript.ld
+**
+** @author : Auto-generated by STM32CubeIDE
+**
+** Abstract : Linker script for NUCLEO-F767ZI Board embedding STM32F767ZITx Device from stm32f7 series
+** 2048Kbytes FLASH
+** 512Kbytes RAM
+**
+** Set heap size, stack size and stack location according
+** to application requirements.
+**
+** Set memory bank area and size if external memory is used
+**
+** Target : STMicroelectronics STM32
+**
+** Distribution: The file is distributed as is, without any warranty
+** of any kind.
+**
+******************************************************************************
+** @attention
+**
+** Copyright (c) 2022 STMicroelectronics.
+** All rights reserved.
+**
+** This software is licensed under terms that can be found in the LICENSE file
+** in the root directory of this software component.
+** If no LICENSE file comes with this software, it is provided AS-IS.
+**
+******************************************************************************
+*/
+
+/* Entry Point */
+ENTRY(Reset_Handler)
+
+/* Highest address of the user mode stack */
+_estack = ORIGIN(RAM) + LENGTH(RAM); /* end of "RAM" Ram type memory */
+
+_Min_Heap_Size = 8K; /* required amount of heap */
+_Min_Stack_Size = 4K; /* required amount of stack */
+
+/* Memories definition */
+MEMORY
+{
+ FLASH (rx) : ORIGIN = 0x8000000, LENGTH = 2048K
+ RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 447K
+ RAM_NO_CACHE (rwx) : ORIGIN = 0x2006FC00, LENGTH = 65K
+}
+
+/* Sections */
+SECTIONS
+{
+ /* The startup code into "FLASH" Rom type memory */
+ .isr_vector :
+ {
+ . = ALIGN(4);
+ KEEP(*(.isr_vector)) /* Startup code */
+ . = ALIGN(4);
+ } >FLASH
+
+ /* The program code and other data into "FLASH" Rom type memory */
+ .text :
+ {
+ . = ALIGN(4);
+ *(.text) /* .text sections (code) */
+ *(.text*) /* .text* sections (code) */
+ *(.glue_7) /* glue arm to thumb code */
+ *(.glue_7t) /* glue thumb to arm code */
+ *(.eh_frame)
+
+ KEEP (*(.init))
+ KEEP (*(.fini))
+
+ . = ALIGN(4);
+ _etext = .; /* define a global symbols at end of code */
+ } >FLASH
+
+ /* Constant data into "FLASH" Rom type memory */
+ .rodata :
+ {
+ . = ALIGN(4);
+ *(.rodata) /* .rodata sections (constants, strings, etc.) */
+ *(.rodata*) /* .rodata* sections (constants, strings, etc.) */
+ . = ALIGN(4);
+ } >FLASH
+
+ .ARM.extab : {
+ . = ALIGN(4);
+ *(.ARM.extab* .gnu.linkonce.armextab.*)
+ . = ALIGN(4);
+ } >FLASH
+
+ .ARM : {
+ . = ALIGN(4);
+ __exidx_start = .;
+ *(.ARM.exidx*)
+ __exidx_end = .;
+ . = ALIGN(4);
+ } >FLASH
+
+ .preinit_array :
+ {
+ . = ALIGN(4);
+ PROVIDE_HIDDEN (__preinit_array_start = .);
+ KEEP (*(.preinit_array*))
+ PROVIDE_HIDDEN (__preinit_array_end = .);
+ . = ALIGN(4);
+ } >FLASH
+
+ .init_array :
+ {
+ . = ALIGN(4);
+ PROVIDE_HIDDEN (__init_array_start = .);
+ KEEP (*(SORT(.init_array.*)))
+ KEEP (*(.init_array*))
+ PROVIDE_HIDDEN (__init_array_end = .);
+ . = ALIGN(4);
+ } >FLASH
+
+ .fini_array :
+ {
+ . = ALIGN(4);
+ PROVIDE_HIDDEN (__fini_array_start = .);
+ KEEP (*(SORT(.fini_array.*)))
+ KEEP (*(.fini_array*))
+ PROVIDE_HIDDEN (__fini_array_end = .);
+ . = ALIGN(4);
+ } >FLASH
+
+ /* Used by the startup to initialize data */
+ _sidata = LOADADDR(.data);
+
+ /* Initialized data sections into "RAM" Ram type memory */
+ .data :
+ {
+ . = ALIGN(4);
+ _sdata = .; /* create a global symbol at data start */
+ *(.data) /* .data sections */
+ *(.data*) /* .data* sections */
+ *(.RamFunc) /* .RamFunc sections */
+ *(.RamFunc*) /* .RamFunc* sections */
+
+ . = ALIGN(4);
+ _edata = .; /* define a global symbol at data end */
+
+ } >RAM AT> FLASH
+
+ /* Uninitialized data section into "RAM" Ram type memory */
+ . = ALIGN(4);
+ .bss :
+ {
+ /* This is used by the startup in order to initialize the .bss section */
+ _sbss = .; /* define a global symbol at bss start */
+ __bss_start__ = _sbss;
+ *(.bss)
+ *(.bss*)
+ *(COMMON)
+
+ . = ALIGN(4);
+ _ebss = .; /* define a global symbol at bss end */
+ __bss_end__ = _ebss;
+ } >RAM
+
+ /* User_heap_stack section, used to check that there is enough "RAM" Ram type memory left */
+ ._user_heap_stack :
+ {
+ . = ALIGN(8);
+ PROVIDE ( end = . );
+ PROVIDE ( _end = . );
+ . = . + _Min_Heap_Size;
+ . = . + _Min_Stack_Size;
+ . = ALIGN(8);
+ } >RAM
+
+ .EthDescriptorsBlock (NOLOAD) :
+ {
+ . = ALIGN(1K);
+ __ETH_DESCRIPTORS_START = .;
+ *(.RxDescripSection)
+ *(.TxDescripSection)
+ . = ALIGN(1K);
+ __ETH_DESCRIPTORS_END = .;
+ } >RAM_NO_CACHE
+
+ .EthBuffersBlock (NOLOAD) :
+ {
+ . = ALIGN(64K);
+ __ETH_BUFFERS_START = .;
+ *(.EthBuffersSection)
+ . = ALIGN(64K);
+ __ETH_BUFFERS_END = .;
+ } >RAM_NO_CACHE
+
+ /* Remove information from the compiler libraries */
+ /DISCARD/ :
+ {
+ libc.a ( * )
+ libm.a ( * )
+ libgcc.a ( * )
+ }
+
+ .ARM.attributes 0 : { *(.ARM.attributes) }
+}

source/portable/NetworkInterface/STM32/mpu.c

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+#include "main.h"
+#include "mpu.h"
+
+void MPU_Config(void)
+{
+ LL_MPU_Disable();
+
+ extern int __ETH_DESCRIPTORS_START, __ETH_BUFFERS_START;
+
+ LL_MPU_ConfigRegion(
+ LL_MPU_REGION_NUMBER0,
+ 0x0,
+ ( uint32_t )&__ETH_DESCRIPTORS_START,
+ LL_MPU_REGION_SIZE_1KB|LL_MPU_TEX_LEVEL0|LL_MPU_REGION_FULL_ACCESS|\
+ LL_MPU_INSTRUCTION_ACCESS_DISABLE|LL_MPU_ACCESS_NOT_SHAREABLE|LL_MPU_ACCESS_NOT_CACHEABLE|\
+ LL_MPU_ACCESS_BUFFERABLE
+ );
+ LL_MPU_EnableRegion(LL_MPU_REGION_NUMBER0);
+
+ LL_MPU_ConfigRegion(
+ LL_MPU_REGION_NUMBER1,
+ 0x0,
+ ( uint32_t )&__ETH_BUFFERS_START,
+ LL_MPU_REGION_SIZE_64KB|LL_MPU_TEX_LEVEL1|LL_MPU_REGION_FULL_ACCESS|\
+ LL_MPU_INSTRUCTION_ACCESS_DISABLE|LL_MPU_ACCESS_NOT_SHAREABLE|LL_MPU_ACCESS_NOT_CACHEABLE|\
+ LL_MPU_ACCESS_NOT_BUFFERABLE
+ );
+ LL_MPU_EnableRegion(LL_MPU_REGION_NUMBER1);
+
+ LL_MPU_Enable(LL_MPU_CTRL_PRIVILEGED_DEFAULT);
+}