Update K64F linker scripts for bootloader support

Add MBED_APP_START and MBED_APP_SIZE to the K64F's linker script
so the start and size of an image can be specified. This allows the
ROM to be split into a bootloader region and an application region.

Author: c1728p9

targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_MCU_K64F/device/TOOLCHAIN_ARM_STD/MK64FN1M0xxx12.sct

@@ -60,14 +60,22 @@
   #define __ram_vector_table_size__    0x00000000
 #endif
 
-#define m_interrupts_start             0x00000000
+#if !defined(MBED_APP_START)
+  #define MBED_APP_START 0
+#endif
+
+#if !defined(MBED_APP_SIZE)
+  #define MBED_APP_SIZE 0x100000
+#endif
+
+#define m_interrupts_start             MBED_APP_START
 #define m_interrupts_size              0x00000400
 
-#define m_flash_config_start           0x00000400
+#define m_flash_config_start           MBED_APP_START + 0x400
 #define m_flash_config_size            0x00000010
 
-#define m_text_start                   0x00000410
-#define m_text_size                    0x000FFBF0
+#define m_text_start                   MBED_APP_START + 0x410
+#define m_text_size                    MBED_APP_SIZE - 0x410
 
 #define m_interrupts_ram_start         0x1FFF0000
 #define m_interrupts_ram_size          __ram_vector_table_size__

targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_MCU_K64F/device/TOOLCHAIN_GCC_ARM/MK64FN1M0xxx12.ld

@@ -63,16 +63,24 @@ __stack_size__ = 0x400;
  * heap and the page heap in uVisor applications. */
 __heap_size__ = 0x6000;
 
+#if !defined(MBED_APP_START)
+  #define MBED_APP_START 0
+#endif
+
+#if !defined(MBED_APP_SIZE)
+  #define MBED_APP_SIZE 0x100000
+#endif
+
 HEAP_SIZE  = DEFINED(__heap_size__)  ? __heap_size__  : 0x0400;
 STACK_SIZE = DEFINED(__stack_size__) ? __stack_size__ : 0x0400;
 M_VECTOR_RAM_SIZE = DEFINED(__ram_vector_table__) ? 0x0400 : 0x0;
 
 /* Specify the memory areas */
 MEMORY
 {
-  m_interrupts          (RX)  : ORIGIN = 0x00000000, LENGTH = 0x00000400
-  m_flash_config        (RX)  : ORIGIN = 0x00000400, LENGTH = 0x00000010
-  m_text                (RX)  : ORIGIN = 0x00000410, LENGTH = 0x000FFBF0
+  m_interrupts          (RX)  : ORIGIN = MBED_APP_START, LENGTH = 0x400
+  m_flash_config        (RX)  : ORIGIN = MBED_APP_START + 0x400, LENGTH = 0x10
+  m_text                (RX)  : ORIGIN = MBED_APP_START + 0x410, LENGTH = MBED_APP_SIZE - 0x410
   m_data                (RW)  : ORIGIN = 0x1FFF0000, LENGTH = 0x00010000
   m_data_2              (RW)  : ORIGIN = 0x20000000, LENGTH = 0x00030000
 }

targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_MCU_K64F/device/TOOLCHAIN_IAR/MK64FN1M0xxx12.icf

@@ -53,17 +53,25 @@ define symbol __ram_vector_table__ = 1;
 define symbol __stack_size__=0x8000;
 define symbol __heap_size__=0x10000;
 
+if (!isdefinedsymbol(MBED_APP_START)) {
+    define symbol MBED_APP_START = 0;
+}
+
+if (!isdefinedsymbol(MBED_APP_SIZE)) {
+    define symbol MBED_APP_SIZE = 0x100000;
+}
+
 define symbol __ram_vector_table_size__ =  isdefinedsymbol(__ram_vector_table__) ? 0x00000400 : 0;
 define symbol __ram_vector_table_offset__ =  isdefinedsymbol(__ram_vector_table__) ? 0x000003FF : 0;
 
-define symbol m_interrupts_start       = 0x00000000;
-define symbol m_interrupts_end         = 0x000003FF;
+define symbol m_interrupts_start       = MBED_APP_START;
+define symbol m_interrupts_end         = MBED_APP_START + 0x3FF;
 
-define symbol m_flash_config_start     = 0x00000400;
-define symbol m_flash_config_end       = 0x0000040F;
+define symbol m_flash_config_start     = MBED_APP_START + 0x400;
+define symbol m_flash_config_end       = MBED_APP_START + 0x40F;
 
-define symbol m_text_start             = 0x00000410;
-define symbol m_text_end               = 0x000FFFFF;
+define symbol m_text_start             = MBED_APP_START + 0x410;
+define symbol m_text_end               = MBED_APP_START + MBED_APP_SIZE - 1;
 
 define symbol m_interrupts_ram_start   = 0x1FFF0000;
 define symbol m_interrupts_ram_end     = 0x1FFF0000 + __ram_vector_table_offset__;