fix(f722): bound flash operations from sram

firmware/platforms/stm32f7/tests/platform_safety_boundary.rs

@@ -183,6 +183,20 @@ fn ordinary_f722_image_has_direct_configuration_after_output_inhibition() {
     );
 }
 
+#[test]
+fn flash_busy_deadline_resets_entirely_from_sram() {
+    let config = platform_source("src/f722/config.rs");
+    assert!(config.contains("link_section = \".data.kaptan_flash_operation\""));
+    assert!(config.contains("fn execute(&self, operation: F722FlashOperation)"));
+    assert!(config.contains("\"mrs {primask}, PRIMASK\""));
+    assert!(config.contains("\"cpsid i\""));
+    assert!(config.contains("\"cpsie i\""));
+    assert!(config.contains("fn reset_after_flash_timeout() -> !"));
+    assert!(config.contains("SYSRESETREQ"));
+    assert!(config.contains("core::arch::asm!(\"dsb sy\""));
+    assert!(!config.contains("BusyTimeout"));
+}
+
 #[test]
 fn usart_tx_dma_arms_each_stream_before_its_request() {
     let usart = platform_source("src/f722/peripherals/usart.rs");