Add shared emulator services, waveform generation and STM32 USB boot ports

c/set-protocol/ports/stm32g474-usb-boot/boot_image.h

@@ -0,0 +1,34 @@
+#ifndef G474_BOOT_IMAGE_H
+#define G474_BOOT_IMAGE_H
+#include "boot_port.h"
+#include <string.h>
+/* SRAM1+SRAM2: 96 KB; CCM: 32 KB, also aliased after SRAM2. */
+static inline bool g474_vectors_valid(const uint8_t *image, uint32_t size)
+{
+    uint32_t sp, pc;
+    if (size < 8 || size > G474_APP_SIZE) return false;
+    memcpy(&sp, image, 4); memcpy(&pc, image + 4, 4);
+    return !(sp & 7U) &&
+        ((sp > 0x20000000UL && sp <= 0x20020000UL) ||
+         (sp > 0x10000000UL && sp <= 0x10008000UL)) &&
+        (pc & 1U) && (pc & ~1UL) >= G474_APP_BASE &&
+        (pc & ~1UL) < G474_APP_BASE + size;
+}
+/* A contiguous xB slot at 0x08010000 exists only with DBANK=0.
+ * In dual mode the upper 64 KB is at 0x08040000, not at this slot address. */
+static inline bool g474_geometry_supported(uint16_t flash_kb, bool dual, bool swapped)
+{
+    return flash_kb == 128U && !dual && !swapped;
+}
+static inline bool g474_flash_page(uint32_t address, bool dual,
+                                    uint32_t *bank, uint32_t *page)
+{
+    uint32_t offset;
+    if (dual || address < G474_META_BASE || address >= G474_APP_BASE + G474_APP_SIZE)
+        return false;
+    offset = address - 0x08000000UL;
+    *bank = 1U;
+    *page = offset / 4096U;
+    return true;
+}
+#endif