Add hello_trustzone_no_flash example

Author: will-v-pi

trustzone/hello_trustzone/CMakeLists.txt

@@ -31,3 +31,42 @@ pico_set_security_ram_split(hello_trustzone_s hello_trustzone_ns SIMPLE 64k 2k)
 
 # Create combined UF2 (ns first)
 pico_concatenate_uf2_outputs(hello_trustzone hello_trustzone_ns hello_trustzone_s)
+
+
+
+# no_flash example
+# Add secure executable
+add_executable(hello_trustzone_no_flash_s secure.c)
+target_link_libraries(hello_trustzone_no_flash_s
+        pico_stdlib
+        hardware_watchdog
+        pico_secure
+)
+
+pico_set_binary_type(hello_trustzone_no_flash_s no_flash)
+pico_add_extra_outputs(hello_trustzone_no_flash_s)
+
+# Add non-secure executable
+add_executable(hello_trustzone_no_flash_ns nonsecure.c)
+pico_set_uf2_family(hello_trustzone_no_flash_ns "rp2350-arm-ns")
+target_link_libraries(hello_trustzone_no_flash_ns
+        pico_stdlib
+)
+pico_enable_stdio_uart(hello_trustzone_no_flash_ns 0)
+pico_enable_stdio_usb(hello_trustzone_no_flash_ns 1)
+
+pico_set_binary_type(hello_trustzone_no_flash_ns no_flash)
+pico_add_extra_outputs(hello_trustzone_no_flash_ns)
+
+# Set security options
+pico_set_security_options(hello_trustzone_no_flash_s hello_trustzone_no_flash_ns
+    USER_IRQ USB
+    NONSECURE_TIMER 1
+)
+
+# Set security ram split (with NO_FLASH)
+pico_set_security_ram_split(hello_trustzone_no_flash_s hello_trustzone_no_flash_ns SIMPLE 64k 2k NO_FLASH)
+
+# Create combined CMake target
+add_custom_target(hello_trustzone_no_flash ALL
+        DEPENDS hello_trustzone_no_flash_s hello_trustzone_no_flash_ns)

trustzone/hello_trustzone/secure.c

@@ -54,6 +54,7 @@ int main()
     // Create user callback
     rom_secure_call_add_user_callback(secure_call_user_callback, SECURE_CALL_CALLBACKS_MASK);
 
+#if !PICO_SECURITY_SPLIT_NO_FLASH
     // Get boot partition
     boot_info_t info;
     rom_get_boot_info(&info);
@@ -64,6 +65,7 @@ int main()
     printf("Matching Non-Secure partition: %d\n", ns_partition);
     int rc = rom_roll_qmi_to_partition(ns_partition);
     printf("Rolled QMI to Non-Secure partition, rc=%d\n", rc);
+#endif
 
     // Configure SAU regions
     secure_sau_configure_split();