fw: Add pre loaded flash app and flash data storage

- Add per app flash storage
  - Adds four data areas. An app can allocate an area. Once allocated
    the area is tied to the CDI of the app and can only be
    read/written/deallocated by the same app.
- Add two pre loaded app slots to flash
  - Load an app from the first slot at boot. The app digest must match a
    specific digest specified in firmware.
  - Optionally load an app from the second slot
- Add a resetinfo area in FW_RAM which is used to signal an app's intent
  of resetting the system and, optionally, pass data to firmware or the
  next app in a bootchain.

Co-authored-by: Jonas Thörnblad <jonas@tillitis.se>
Co-authored-by: Mikael Ågren <mikael@tillitis.se>
Co-authored-by: Daniel Jobson <jobson@tillitis.se>

hw/application_fpga/fw/tk1/resetinfo.h

@@ -0,0 +1,28 @@
+// Copyright (C) 2025 - Tillitis AB
+// SPDX-License-Identifier: GPL-2.0-only
+
+#ifndef TKEY_RESETINFO_H
+#define TKEY_RESETINFO_H
+
+#include <stdint.h>
+
+#define TK1_MMIO_RESETINFO_BASE 0xd0000f00
+#define TK1_MMIO_RESETINFO_SIZE 0x100
+
+enum reset_start {
+	START_DEFAULT = 0, // Probably cold boot
+	START_FLASH0 = 1,
+	START_FLASH1 = 2,
+	START_FLASH0_VER = 3,
+	START_FLASH1_VER = 4,
+	START_CLIENT = 5,
+	START_CLIENT_VER = 6,
+};
+
+struct reset {
+	uint32_t type;		    // Reset type
+	uint8_t app_digest[32];	    // Program digest
+	uint8_t next_app_data[220]; // Data to leave around for next app
+};
+
+#endif