Merge pull request #12992 from jeromecoutant/PR_BAREMETAL_SUPPORT_STEP1

STM32 baremetal support step1 (F0/F1/F3/H7/L0)

Author: 0xc0170

targets/TARGET_STM/TARGET_STM32F0/TARGET_NUCLEO_F070RB/device/TOOLCHAIN_ARM/stm32f070xb.sct

@@ -1,54 +1,52 @@
 #! armcc -E
 ; Scatter-Loading Description File
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-; Copyright (c) 2014, STMicroelectronics
-; All rights reserved.
 ;
-; 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 of STMicroelectronics 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 HOLDER 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.
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+; SPDX-License-Identifier: BSD-3-Clause
+;******************************************************************************
+;* @attention
+;*
+;* Copyright (c) 2014-2020 STMicroelectronics.
+;* All rights reserved.
+;*
+;* This software component is licensed by ST under BSD 3-Clause license,
+;* the "License"; You may not use this file except in compliance with the
+;* License. You may obtain a copy of the License at:
+;*                        opensource.org/licenses/BSD-3-Clause
+;*
+;******************************************************************************
+
+#if !defined(MBED_APP_START)
+  #define MBED_APP_START  MBED_ROM_START
+#endif
+
+#if !defined(MBED_APP_SIZE)
+  #define MBED_APP_SIZE  MBED_ROM_SIZE
+#endif
 
 #if !defined(MBED_BOOT_STACK_SIZE)
-  #define MBED_BOOT_STACK_SIZE 0x400
+/* This value is normally defined by the tools to 0x1000 for bare metal and 0x400 for RTOS */
+  #define MBED_BOOT_STACK_SIZE  0x400
 #endif
 
-#define Stack_Size MBED_BOOT_STACK_SIZE
+/* Round up VECTORS_SIZE to 8 bytes */
+#define NVIC_NUM_VECTORS 48
+#define VECTORS_SIZE  (((NVIC_NUM_VECTORS * 4) + 7) AND ~7)
 
-; STM32F070RB: 128KB FLASH (0x20000) + 16KB RAM (0x4000)
+LR_IROM1  MBED_APP_START  MBED_APP_SIZE  {
 
- LR_IROM1 0x08000000 0x20000  {    ; load region size_region
-  ER_IROM1 0x08000000 0x20000  {  ; load address = execution address 
-   *.o (RESET, +First)
-   *(InRoot$$Sections)
-   .ANY (+RO)
+  ER_IROM1  MBED_APP_START  MBED_APP_SIZE  {
+    *.o (RESET, +First)
+    *(InRoot$$Sections)
+    .ANY (+RO)
   }
 
-  ; 48 vectors = 192 bytes (0xC0) to be reserved in RAM
-  RW_IRAM1 (0x20000000+0xC0) (0x4000-0xC0-Stack_Size)  {  ; RW data
-   .ANY (+RW +ZI)
+  RW_IRAM1  (MBED_RAM_START + VECTORS_SIZE)  {  ; RW data
+    .ANY (+RW +ZI)
   }
 
-  ARM_LIB_STACK (0x20000000+0x4000) EMPTY -Stack_Size { ; stack
+  ARM_LIB_HEAP  AlignExpr(+0, 16)  EMPTY  (MBED_RAM_START + MBED_RAM_SIZE - MBED_BOOT_STACK_SIZE - AlignExpr(ImageLimit(RW_IRAM1), 16))  { ; Heap growing up
   }
-}
 
+  ARM_LIB_STACK  (MBED_RAM_START + MBED_RAM_SIZE)  EMPTY  -MBED_BOOT_STACK_SIZE  { ; Stack region growing down
+  }
+}

targets/TARGET_STM/TARGET_STM32F0/TARGET_NUCLEO_F070RB/device/TOOLCHAIN_GCC_ARM/STM32F070XB.ld

@@ -1,22 +1,50 @@
 /* Linker script to configure memory regions. */
+/*
+ * SPDX-License-Identifier: BSD-3-Clause
+ ******************************************************************************
+ * @attention
+ *
+ * Copyright (c) 2016-2020 STMicroelectronics.
+ * All rights reserved.
+ *
+ * This software component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ *                        opensource.org/licenses/BSD-3-Clause
+ *
+ ******************************************************************************
+*/
+
+
+#if !defined(MBED_APP_START)
+  #define MBED_APP_START  MBED_ROM_START
+#endif
+
+#if !defined(MBED_APP_SIZE)
+  #define MBED_APP_SIZE  MBED_ROM_SIZE
+#endif
 
 #if !defined(MBED_BOOT_STACK_SIZE)
-    #define MBED_BOOT_STACK_SIZE 0x400
+    /* This value is normally defined by the tools
+       to 0x1000 for bare metal and 0x400 for RTOS */
+    #define MBED_BOOT_STACK_SIZE  0x400
 #endif
 
-StackSize = MBED_BOOT_STACK_SIZE;
+/* Round up VECTORS_SIZE to 8 bytes */
+#define NVIC_NUM_VECTORS 48
+#define VECTORS_SIZE  (((NVIC_NUM_VECTORS * 4) + 7) & 0xFFFFFFF8)
 
 MEMORY
-{ 
-  FLASH (rx)      : ORIGIN = 0x08000000, LENGTH = 128k
-  RAM (xrw)       : ORIGIN = 0x200000C0, LENGTH = 16k - 0x0C0
+{
+    FLASH (rx)   : ORIGIN = MBED_APP_START, LENGTH = MBED_APP_SIZE
+    RAM (rwx)    : ORIGIN = MBED_RAM_START + VECTORS_SIZE, LENGTH = MBED_RAM_SIZE - VECTORS_SIZE
 }
 
 /* Linker script to place sections and symbol values. Should be used together
  * with other linker script that defines memory regions FLASH and RAM.
  * It references following symbols, which must be defined in code:
  *   Reset_Handler : Entry of reset handler
- * 
+ *
  * It defines following symbols, which code can use without definition:
  *   __exidx_start
  *   __exidx_end
@@ -47,6 +75,7 @@ SECTIONS
     {
         KEEP(*(.isr_vector))
         *(.text*)
+
         KEEP(*(.init))
         KEEP(*(.fini))
 
@@ -83,7 +112,7 @@ SECTIONS
 
     __etext = .;
     _sidata = .;
-
+    
     .data : AT (__etext)
     {
         __data_start__ = .;
@@ -104,7 +133,6 @@ SECTIONS
         KEEP(*(.init_array))
         PROVIDE_HIDDEN (__init_array_end = .);
 
-
         . = ALIGN(8);
         /* finit data */
         PROVIDE_HIDDEN (__fini_array_start = .);
@@ -120,20 +148,19 @@ SECTIONS
 
     } > RAM
 
-    /* .stack section doesn't contains any symbols. It is only
-     * used for linker to reserve space for the main stack section
-     */
-    .stack (NOLOAD):
+    /* Uninitialized data section
+     * This region is not initialized by the C/C++ library and can be used to
+     * store state across soft reboots. */
+    .uninitialized (NOLOAD):
     {
-        __StackLimit = .;
-        *(.stack*);
-        . += StackSize - (. - __StackLimit);
+        . = ALIGN(32);
+        __uninitialized_start = .;
+        *(.uninitialized)
+        KEEP(*(.keep.uninitialized))
+        . = ALIGN(32);
+        __uninitialized_end = .;
     } > RAM
-    __StackTop = ADDR(.stack) + StackSize;
-    _estack = __StackTop;
-    __StackLimit = ADDR(.stack);
-    PROVIDE(__stack = __StackTop);
-
+    
     .bss :
     {
         . = ALIGN(8);
@@ -149,14 +176,27 @@ SECTIONS
     .heap (COPY):
     {
         __end__ = .;
-        end = __end__;
-        *(.heap*);
-        . += (ORIGIN(RAM) + LENGTH(RAM) - .);
+        PROVIDE(end = .);
+        *(.heap*)
+        . = ORIGIN(RAM) + LENGTH(RAM) - MBED_BOOT_STACK_SIZE;
         __HeapLimit = .;
     } > RAM
 
-    PROVIDE(__heap_size = SIZEOF(.heap));
-    PROVIDE(__mbed_sbrk_start = ADDR(.heap));
-    PROVIDE(__mbed_krbs_start = ADDR(.heap) + SIZEOF(.heap));
+    /* .stack_dummy section doesn't contains any symbols. It is only
+     * used for linker to calculate size of stack sections, and assign
+     * values to stack symbols later */
+    .stack_dummy (COPY):
+    {
+        *(.stack*)
+    } > RAM
+
+    /* Set stack top to end of RAM, and stack limit move down by
+     * size of stack_dummy section */
+    __StackTop = ORIGIN(RAM) + LENGTH(RAM);
+    _estack = __StackTop;
+    __StackLimit = __StackTop - MBED_BOOT_STACK_SIZE;
+    PROVIDE(__stack = __StackTop);
 
+    /* Check if data + heap + stack exceeds RAM limit */
+    ASSERT(__StackLimit >= __HeapLimit, "region RAM overflowed with stack")
 }

targets/TARGET_STM/TARGET_STM32F0/TARGET_NUCLEO_F070RB/device/TOOLCHAIN_IAR/stm32f070xb.icf

@@ -1,36 +1,59 @@
-/*###ICF### Section handled by ICF editor, don't touch! ****/
-/*-Editor annotation file-*/
-/* IcfEditorFile="$TOOLKIT_DIR$\config\ide\IcfEditor\cortex_v1_0.xml" */
-/*-Specials-*/
-define symbol __ICFEDIT_intvec_start__ = 0x08000000;
-/*-Memory Regions-*/
-define symbol __ICFEDIT_region_ROM_start__ = 0x08000000;
-define symbol __ICFEDIT_region_ROM_end__   = 0x0801FFFF;
-define symbol __ICFEDIT_region_RAM_start__ = 0x200000C0;
-define symbol __ICFEDIT_region_RAM_end__   = 0x20003FFF;
-/*-Sizes-*/
+/* Linker script to configure memory regions.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ ******************************************************************************
+ * @attention
+ *
+ * Copyright (c) 2016-2020 STMicroelectronics.
+ * All rights reserved.
+ *
+ * This software component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ *                        opensource.org/licenses/BSD-3-Clause
+ *
+ ******************************************************************************
+*/
+/* Device specific values */
+
+/* Tools provide -DMBED_ROM_START=xxx -DMBED_ROM_SIZE=xxx -DMBED_RAM_START=xxx -DMBED_RAM_SIZE=xxx */
+
+define symbol VECTORS     = 48; /* This value must match NVIC_NUM_VECTORS in cmsis_nvic.h */
+define symbol HEAP_SIZE   = 0x1000;
+
+/* Common - Do not change */
+
+if (!isdefinedsymbol(MBED_APP_START)) {
+    define symbol MBED_APP_START = MBED_ROM_START;
+}
+
+if (!isdefinedsymbol(MBED_APP_SIZE)) {
+    define symbol MBED_APP_SIZE = MBED_ROM_SIZE;
+}
+
 if (!isdefinedsymbol(MBED_BOOT_STACK_SIZE)) {
+    /* This value is normally defined by the tools 
+        to 0x1000 for bare metal and 0x400 for RTOS */
     define symbol MBED_BOOT_STACK_SIZE = 0x400;
 }
-define symbol __ICFEDIT_size_cstack__ = MBED_BOOT_STACK_SIZE;
-define symbol __ICFEDIT_size_heap__   = 0xC00;
-/**** End of ICF editor section. ###ICF###*/
+
+/* Round up VECTORS_SIZE to 8 bytes */
+define symbol VECTORS_SIZE = ((VECTORS * 4) + 7) & ~7;
+define symbol RAM_REGION_START = MBED_RAM_START + VECTORS_SIZE;
+define symbol RAM_REGION_SIZE = MBED_RAM_SIZE - VECTORS_SIZE;
 
 define memory mem with size = 4G;
-define region ROM_region   = mem:[from __ICFEDIT_region_ROM_start__   to __ICFEDIT_region_ROM_end__];
-define region RAM_region   = mem:[from __ICFEDIT_region_RAM_start__   to __ICFEDIT_region_RAM_end__];
+define region ROM_region = mem:[from MBED_APP_START size MBED_APP_SIZE];
+define region RAM_region = mem:[from RAM_REGION_START size RAM_REGION_SIZE];
 
-define block CSTACK    with alignment = 8, size = __ICFEDIT_size_cstack__   { };
-define block HEAP      with alignment = 8, size = __ICFEDIT_size_heap__     { };
+define block CSTACK    with alignment = 8, size = MBED_BOOT_STACK_SIZE   { };
+define block HEAP      with alignment = 8, size = HEAP_SIZE     { };
 
 initialize by copy { readwrite };
 do not initialize  { section .noinit };
 
-place at address mem:__ICFEDIT_intvec_start__ { readonly section .intvec };
+place at address mem: MBED_APP_START { readonly section .intvec };
 
 place in ROM_region   { readonly };
 place in RAM_region   { readwrite,
                         block CSTACK, block HEAP };
-
-export symbol __ICFEDIT_region_RAM_start__;
-export symbol __ICFEDIT_region_RAM_end__;

targets/TARGET_STM/TARGET_STM32F0/TARGET_NUCLEO_F070RB/device/cmsis_nvic.h

@@ -1,33 +1,18 @@
 /* mbed Microcontroller Library
- * CMSIS-style functionality to support dynamic vectors
- *******************************************************************************
- * Copyright (c) 2015, STMicroelectronics
- * All rights reserved.
+ * SPDX-License-Identifier: BSD-3-Clause
+ ******************************************************************************
+ * @attention
  *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
+ * <h2><center>&copy; Copyright (c) 2015-2020 STMicroelectronics.
+ * All rights reserved.</center></h2>
  *
- * 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 of STMicroelectronics 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 component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ *                        opensource.org/licenses/BSD-3-Clause
  *
- * 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 HOLDER 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.
- *******************************************************************************
- */ 
+ ******************************************************************************
+*/
 
 #ifndef MBED_CMSIS_NVIC_H
 #define MBED_CMSIS_NVIC_H