TARGET_ONSEMI: ISR stack size unification

Unify ISR stack size for targets which support MBED 5 (or MBED 2 and MBED 5).

 MBED 5 : 0 boards
----------------

 MBED 2, 5 : 1 boards
----------------
NCS36510

 MBED 2 : 0 boards (skipped)
----------------

Author: mprse

targets/TARGET_ONSEMI/TARGET_NCS36510/device/TOOLCHAIN_ARM/NCS36510.sct

@@ -1,4 +1,5 @@
 #! armcc -E
+#include "mbed_config.h"
 
 LR_IROM1 0x00003000 0x0004F000  {    ; load region size_region
   ER_IROM1 0x00003000 0x0004F000  {  ; load address = execution address
@@ -8,8 +9,20 @@ LR_IROM1 0x00003000 0x0004F000  {    ; load region size_region
   }
 
 
+#if (defined(__stack_size__))
+  #define Stack_Size                   __stack_size__
+#else
+  #if (defined(MBED_CONF_RTOS_PRESENT))
+    #define Stack_Size                   0x0400
+  #else
+    #define Stack_Size                   0x1000
+  #endif
+#endif
+
   RW_IRAM1 0x3FFF4000 + 0x90 { ; 8_byte_aligned(35 vectors * 4 bytes each) = 0x90
     .ANY(+RW +ZI)
   }
-  ARM_LIB_HEAP AlignExpr(+0, 8) ALIGN 8 EMPTY (0x3FFF4000 + 0xC000 - AlignExpr(ImageLimit(RW_IRAM1),8) ) {}
+  ARM_LIB_HEAP AlignExpr(+0, 8) ALIGN 8 EMPTY (0x3FFF4000 + 0xC000 - AlignExpr(ImageLimit(RW_IRAM1),8) - Stack_Size ) {}
+  ARM_LIB_STACK 0x3FFF4000+0xC000 EMPTY -Stack_Size { ; Stack region growing down
+  }
 }

targets/TARGET_ONSEMI/TARGET_NCS36510/device/TOOLCHAIN_GCC_ARM/NCS36510.ld

@@ -154,7 +154,7 @@ MEMORY {
         __end__ = .;
         end = __end__;
         *(.heap*);
-        . += 0x800;
+        . = ORIGIN(RAM) + LENGTH(RAM) - Stack_Size - .;
         __HeapLimit = .;
     } > RAM
     PROVIDE(__heap_size = SIZEOF(.heap));
@@ -169,12 +169,12 @@ MEMORY {
     {
         __StackLimit = .;
         *(.stack*);
-        . += 0x800 - (. - __StackLimit);
+        . += Stack_Size;
     } > RAM
 
     /* Set stack top to end of RAM */
     __StackTop = ORIGIN(RAM) + LENGTH(RAM);
-    __StackLimit = __StackTop - SIZEOF(.stack);
+    __StackLimit = __StackTop - Stack_Size;
     PROVIDE(__stack = __StackTop);
 
 }

targets/TARGET_ONSEMI/TARGET_NCS36510/device/TOOLCHAIN_GCC_ARM/startup_NCS36510.S

@@ -39,14 +39,18 @@
 .section .stack
 .align 3
 #ifdef __STACK_SIZE
-.equ    Stack_Size, __STACK_SIZE
+    .equ    Stack_Size, __STACK_SIZE
 #else
-.equ    Stack_Size, 0x400
+    #if defined(MBED_CONF_RTOS_PRESENT)
+      .equ    Stack_Size, 0x400
+    #else
+      .equ    Stack_Size, 0x1000
+    #endif
 #endif
 .globl    __StackTop
 .globl    __StackLimit
 __StackLimit:
-.space    Stack_Size
+.globl    Stack_Size
 .size __StackLimit, . - __StackLimit
 __StackTop:
 .size __StackTop, . - __StackTop

targets/TARGET_ONSEMI/TARGET_NCS36510/device/TOOLCHAIN_IAR/NCS36510.icf

@@ -29,7 +29,7 @@ define symbol __ICFEDIT_region_ERAM3_start__ = 0x0;
 define symbol __ICFEDIT_region_ERAM3_end__   = 0x0;
 
 /*-Sizes-*/
-define symbol __ICFEDIT_size_cstack__ = 0x200;
+define symbol __ICFEDIT_size_cstack__ = 0x400;
 define symbol __ICFEDIT_size_heap__   = 0x4000;
 /**** End of ICF editor section. ###ICF###*/
 

targets/TARGET_ONSEMI/mbed_rtx.h

@@ -19,10 +19,6 @@
 
 #if defined(TARGET_NCS36510)
 
-#ifndef INITIAL_SP
-#define INITIAL_SP              (0x40000000UL)
-#endif
-
 #endif
 
 #endif  // MBED_MBED_RTX_H