STM32H7 : use RAM instead of DTCMRAM (ARM toolchain)

Author: VVESTM

targets/TARGET_STM/TARGET_STM32H7/TARGET_STM32H743xI/device/TOOLCHAIN_ARM_STD/startup_stm32h743xx.S

@@ -24,7 +24,7 @@
 ;*
 ;******************************************************************************
 
-__initial_sp    EQU     0x20020000 ; Top of RAM
+            IMPORT |Image$$ARM_LIB_STACK$$ZI$$Limit|
 
                 PRESERVE8
                 THUMB
@@ -36,7 +36,7 @@ __initial_sp    EQU     0x20020000 ; Top of RAM
                 EXPORT  __Vectors_End
                 EXPORT  __Vectors_Size
 
-__Vectors       DCD     __initial_sp                      ; Top of Stack
+__Vectors       DCD     |Image$$ARM_LIB_STACK$$ZI$$Limit| ; Top of Stack
                 DCD     Reset_Handler                     ; Reset Handler
                 DCD     NMI_Handler                       ; NMI Handler
                 DCD     HardFault_Handler                 ; Hard Fault Handler

targets/TARGET_STM/TARGET_STM32H7/TARGET_STM32H743xI/device/TOOLCHAIN_ARM_STD/stm32h743xI.sct

@@ -44,12 +44,12 @@
 
 #define MBED_RAM_START              0x24000000
 #define MBED_RAM_SIZE               0x80000
-#define MBED_VECTTABLE_RAM_START    (MBED_RAM_START)
+#define MBED_VECTTABLE_RAM_START    0x20000000
 #define MBED_VECTTABLE_RAM_SIZE     0x298
 #define MBED_CRASH_REPORT_RAM_START (MBED_VECTTABLE_RAM_START + MBED_VECTTABLE_RAM_SIZE)
 #define MBED_CRASH_REPORT_RAM_SIZE  0x100
-#define MBED_RAM0_START             (MBED_CRASH_REPORT_RAM_START + MBED_CRASH_REPORT_RAM_SIZE)
-#define MBED_RAM0_SIZE              (MBED_RAM_SIZE - MBED_VECTTABLE_RAM_SIZE - MBED_CRASH_REPORT_RAM_SIZE)
+#define MBED_RAM0_START             (MBED_RAM_START)
+#define MBED_RAM0_SIZE              (MBED_RAM_SIZE)
 
 LR_IROM1 MBED_APP_START MBED_APP_SIZE  {    ; load region size_region