Reboot to Hekate menu once without changing hekate_ipl.ini

Mariko: RTC REBOOT_REASON_MENU + PMIC reboot. Erista: patch in-memory
boot_cfg on valid Hekate payload and try common SD paths.

source/utils/utils.c

@@ -11,10 +11,58 @@
 #include "../hid/hid.h"
 #include "../fs/fsutils.h"
 #include "../config.h"
+#include <rtc/max77620-rtc.h>
+#include <string.h>
 
 extern hekate_config h_cfg;
 
-extern int launch_payload(char *path);
+extern int launch_payload_ex(char *path, bool force_hekate_menu);
+
+static const char *hekate_payload_paths[] = {
+	"sd:/atmosphere/reboot_payload.bin",
+	"sd:/bootloader/update.bin",
+	"sd:/bootloader/payloads/hekate.bin",
+	"sd:/sept/payload.bin",
+};
+
+bool hekate_reboot_available(void)
+{
+	if (h_cfg.t210b01)
+		return true;
+
+	for (u32 i = 0; i < sizeof(hekate_payload_paths) / sizeof(hekate_payload_paths[0]); i++)
+	{
+		if (FileExists(hekate_payload_paths[i]))
+			return true;
+	}
+
+	return false;
+}
+
+void reboot_to_hekate_menu(void)
+{
+	if (h_cfg.t210b01)
+	{
+		rtc_reboot_reason_t rr = {0};
+		rr.dec.reason = REBOOT_REASON_MENU;
+		max77620_rtc_set_reboot_reason(&rr);
+		power_set_state(POWER_OFF_REBOOT);
+		return;
+	}
+
+	for (u32 i = 0; i < sizeof(hekate_payload_paths) / sizeof(hekate_payload_paths[0]); i++)
+	{
+		if (!FileExists(hekate_payload_paths[i]))
+			continue;
+
+		if (launch_payload_ex((char *)hekate_payload_paths[i], true) != 2)
+			return;
+	}
+
+	gfx_clearscreen();
+	gfx_printf("\n\nHekate nicht gefunden.\n\nDruecke eine Taste um zurueckzukehren");
+	hidWait();
+}
 
 void inline __attribute__((always_inline)) power_off(){
     power_set_state(POWER_OFF_RESET);

source/utils/utils.h

@@ -6,6 +6,10 @@ void MaskIn(char *mod, u32 bitstream, char mask);
 bool StrEndsWith(char *begin, char *end);
 void WaitFor(u32 ms);
 void RebootToPayloadOrRcm();
+void reboot_to_hekate_menu(void);
+bool hekate_reboot_available(void);
+int launch_payload_ex(char *path, bool force_hekate_menu);
+int launch_payload(char *path);
 
 #define FREE(x) free(x); x = NULL;
 char *ShowKeyboard(const char *toEdit, u8 alwaysRet);