Refactored code to not use macro. Created config xip-enable

Author: linlingao

targets/TARGET_Cypress/TARGET_PSOC6/mbed_overrides.c

@@ -31,7 +31,7 @@
 void mailbox_init(void);
 #endif
 
-#if defined(XIP_ENABLE)
+#if MBED_CONF_TARGET_XIP_ENABLE
 extern void qspi_xip_start();
 #endif
 
@@ -103,7 +103,7 @@ void mbed_sdk_init(void)
     /* Enable global interrupts (disabled in CM4 startup assembly) */
     __enable_irq();
 #endif
-#if defined(XIP_ENABLE)
+#if MBED_CONF_TARGET_XIP_ENABLE
     qspi_xip_start();
 #endif
 

targets/TARGET_Cypress/TARGET_PSOC6/xip_user.c

@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-#ifdef XIP_ENABLE
+#if MBED_CONF_TARGET_XIP_ENABLE
 #include "cy_smif.h"
 #include "cy_smif_memslot.h"
 #include "cycfg_qspi_memslot.h"

targets/targets.json

@@ -51,6 +51,10 @@
             "init-us-ticker-at-boot": {
                 "help": "Initialize the microsecond ticker at boot rather than on first use, and leave it initialized. This speeds up wait_us in particular.",
                 "value": false
+            },
+            "xip-enable": {
+                "help": "Enable Execute In Place (XIP) on this target. Value is only significant if the board has executable external storage such as QSPIF. If this is enabled, customize the linker file to choose what text segments are placed on external storage",
+                "value": false
             }
         }
     },

tools/toolchains/mbed_toolchain.py

@@ -953,6 +953,7 @@ def add_regions(self):
 
     STACK_PARAM = "target.boot-stack-size"
     TFM_LVL_PARAM = "tfm.level"
+    XIP_ENABLE_PARAM = "target.xip-enable"
 
     def add_linker_defines(self):
         params, _ = self.config_data
@@ -974,6 +975,14 @@ def add_linker_defines(self):
             self.ld.append(define_string)
             self.flags["ld"].append(define_string)
 
+        if self.XIP_ENABLE_PARAM in params:
+            define_string = self.make_ld_define(
+                "XIP_ENABLE",
+                params[self.XIP_ENABLE_PARAM].value
+            )
+            self.ld.append(define_string)
+            self.flags["ld"].append(define_string)
+
         if self.target.is_PSA_secure_target:
             for flag, param in [
                 ("MBED_PUBLIC_RAM_START", "target.public-ram-start"),
@@ -990,12 +999,6 @@ def add_linker_defines(self):
                 self.ld.append(define_string)
                 self.flags["ld"].append(define_string)
 
-        if "XIP_ENABLE" in self.target.macros :
-                define_string = self.make_ld_define(
-                    "XIP_ENABLE", 1)
-                self.ld.append(define_string)
-                self.flags["ld"].append(define_string)
-
     # Set the configuration data
     def set_config_data(self, config_data):
         self.config_data = config_data