[TT] Support boot stack size configuration option

Author: mprse

targets/TARGET_TT/TARGET_TT_M3HQ/device/TOOLCHAIN_ARM_STD/tmpm3hqfdfg.sct

@@ -1,3 +1,4 @@
+#! armcc -E
 ;;  TMPM3HQFDFG scatter file
 
 ;;  Vector table starts at 0
@@ -13,6 +14,12 @@
 
 ;; Compatible with ISSM model
 
+#if !defined(MBED_BOOT_STACK_SIZE)
+  #define MBED_BOOT_STACK_SIZE 0x400
+#endif
+
+#define Stack_Size MBED_BOOT_STACK_SIZE
+
 LR_IROM1 0x00000000 0x80000
 {
   ER_IROM1 0x00000000 0x80000
@@ -26,4 +33,7 @@ LR_IROM1 0x00000000 0x80000
   {
     .ANY (+RW, +ZI)
   }
+
+  ARM_LIB_STACK 0x200002D8+0x10000 EMPTY -Stack_Size { ; Stack region growing down
+  }
 }

targets/TARGET_TT/TARGET_TT_M3HQ/device/TOOLCHAIN_GCC_ARM/tmpm3hqfdfg.ld

@@ -7,6 +7,10 @@ MEMORY
   RAM (rwx) : ORIGIN = (0x20000000 + 0x2D8), LENGTH = (64K - 0x2D8)
 }
 
+#if !defined(MBED_BOOT_STACK_SIZE)
+    #define MBED_BOOT_STACK_SIZE 0x400
+#endif
+
 /* 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:
@@ -153,7 +157,7 @@ SECTIONS
     /* Set stack top to end of RAM, and stack limit move down by
      * size of stack_dummy section */
     __StackTop = ORIGIN(RAM) + LENGTH(RAM);
-    __StackLimit = __StackTop - SIZEOF(.stack_dummy);
+    __StackLimit = __StackTop - MBED_BOOT_STACK_SIZE;
     PROVIDE(__stack = __StackTop);
 
     /* Check if data + heap + stack exceeds RAM limit */

targets/TARGET_TT/TARGET_TT_M3HQ/device/TOOLCHAIN_IAR/tmpm3hqfdfg.icf

@@ -9,8 +9,10 @@ define symbol __ICFEDIT_region_ROM_end__     = 0x0007FFFF;
 define symbol __ICFEDIT_region_RAM_start__   = 0x200002D8;
 define symbol __ICFEDIT_region_RAM_end__     = 0x2000FFFF;
 /*-Sizes-*/
-/*Heap 1/4 of ram and stack 1/8*/
-define symbol __ICFEDIT_size_cstack__   = 0x400;
+if (!isdefinedsymbol(MBED_BOOT_STACK_SIZE)) {
+    define symbol MBED_BOOT_STACK_SIZE = 0x400;
+}
+define symbol __ICFEDIT_size_cstack__   = MBED_BOOT_STACK_SIZE;
 define symbol __ICFEDIT_size_heap__     = 0x2000;
 /**** End of ICF editor section. ###ICF###*/