Merge pull request #11006 from linlingao/pr10692

Introduce an Mbed config to enable XIP

Author: 0xc0170

targets/TARGET_Cypress/TARGET_PSOC6/mbed_overrides.c

@@ -91,11 +91,11 @@ void mbed_sdk_init(void)
     us_ticker_init();
 #endif
 
-#if defined(CYBSP_ENABLE_FLASH_STORAGE)
+#if MBED_CONF_TARGET_XIP_ENABLE
     /* The linker script allows storing data in external memory, if needed, enable access to that memory. */
     cybsp_serial_flash_init();
     cybsp_serial_flash_enable_xip(true);
-#endif /* defined(CYBSP_ENABLE_FLASH_STORAGE) */
+#endif
 
     /* Enable global interrupts (disabled in CM4 startup assembly) */
     __enable_irq();

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"),