[Realtek] Support boot stack size configuration option

Author: mprse

targets/TARGET_Realtek/TARGET_AMEBA/TARGET_MCU_RTL8195A/device/TOOLCHAIN_ARM_STD/rtl8195a.sct

@@ -1,3 +1,4 @@
+#! armcc -E
 ; Realtek Semiconductor Corp.
 ;
 ; RTL8195A ARMCC Scatter File
@@ -10,6 +11,12 @@
 ;   DRAM (rwx)   : ORIGIN = 0x30000000, LENGTH = 2M
 ; }
 
+#if !defined(MBED_BOOT_STACK_SIZE)
+  #define MBED_BOOT_STACK_SIZE 0x400
+#endif
+
+#define Stack_Size MBED_BOOT_STACK_SIZE
+
 LR_IRAM 0x10007000 (0x70000 - 0x7000) {
 
   IMAGE2_TABLE 0x10007000 FIXED {
@@ -43,7 +50,7 @@ LR_IRAM 0x10007000 (0x70000 - 0x7000) {
     *mbed_boot*.o (+ZI)
   }
 
-  ARM_LIB_STACK (0x10070000 - 0x1000) EMPTY 0x1000 {
+  ARM_LIB_STACK (0x10070000) EMPTY -Stack_Size {
   }
 }
 

targets/TARGET_Realtek/TARGET_AMEBA/TARGET_MCU_RTL8195A/device/TOOLCHAIN_GCC_ARM/rtl8195a.ld

@@ -25,8 +25,12 @@ MEMORY
   SRAM2 (rwx)      : ORIGIN = 0x30000000, LENGTH = 2M
 }
 
+#if !defined(MBED_BOOT_STACK_SIZE)
+    #define MBED_BOOT_STACK_SIZE 0x400
+#endif
+
 /* Stack sizes: */
-StackSize = 0x1000;
+StackSize = MBED_BOOT_STACK_SIZE;
 
 /* Linker script to place sections and symbol values. Should be used together
  * with other linker script that defines memory regions FLASH and RAM.
@@ -221,7 +225,7 @@ SECTIONS
     /* Set stack top to end of RAM, and stack limit move down by
      * size of stack_dummy section */
     __StackTop = ORIGIN(SRAM1) + LENGTH(SRAM1);
-    __StackLimit = __StackTop - SIZEOF(.stack_dummy);
+    __StackLimit = __StackTop - StackSize;
     PROVIDE(__stack = __StackTop);
 
     /* Check if data + heap + stack exceeds RAM limit */

targets/TARGET_Realtek/TARGET_AMEBA/TARGET_MCU_RTL8195A/device/TOOLCHAIN_IAR/rtl8195a.icf

@@ -29,7 +29,11 @@ define region TCM_region = mem:[from __DTCM_start__ to __DTCM_end__];
 define region RAM_region = mem:[from __SRAM_start__ to __SRAM_end__] |
                            mem:[from __DRAM_start__ to __DRAM_end__];
 
-define block CSTACK with alignment = 8, size = 0x1000  { };
+if (!isdefinedsymbol(MBED_BOOT_STACK_SIZE)) {
+    define symbol MBED_BOOT_STACK_SIZE = 0x400;
+}
+
+define block CSTACK with alignment = 8, size = MBED_BOOT_STACK_SIZE  { };
 define block HEAP   with alignment = 8, size = 0x19000 { };
 
 do not initialize  { section .noinit };

targets/TARGET_Realtek/mbed_rtx.h

@@ -23,21 +23,10 @@
 
 #if defined(__CC_ARM) || (defined(__ARMCC_VERSION) && (__ARMCC_VERSION >= 6010050))
     extern uint32_t             Image$$ARM_LIB_STACK$$ZI$$Base[];
-    extern uint32_t             Image$$ARM_LIB_STACK$$ZI$$Length[];
-    #define ISR_STACK_START     (unsigned char *)(Image$$ARM_LIB_STACK$$ZI$$Base)
-    #define ISR_STACK_SIZE      (uint32_t)(Image$$ARM_LIB_STACK$$ZI$$Length)
-    #define INITIAL_SP          (uint32_t)(Image$$ARM_LIB_STACK$$ZI$$Base)
+    #define INITIAL_SP          ((uint32_t)(Image$$ARM_LIB_STACK$$ZI$$Base))
 #elif defined(__GNUC__)
-    extern uint32_t             __StackTop[];
-    extern uint32_t             __StackLimit[];
-    extern uint32_t             __HeapLimit[];
-    #define INITIAL_SP          (__StackTop)
-#endif
-
-#if defined(__GNUC__)
-#ifndef ISR_STACK_SIZE
-#define ISR_STACK_SIZE          (0x1000)
-#endif
+    extern uint32_t             __StackTop;
+    #define INITIAL_SP          ((uint32_t)(&__StackTop))
 #endif
 
 #endif