Make GPS navigation epochs interrupt-coherent

Wait for every navigation-ready tracking channel in a GPS epoch, remove unlocked channels without a timeout, and keep late joins for the next epoch. Reset PLIC ownership during warm initialization and extend Linux synthetic, integrity, and fake-MMIO regression coverage.

soc/software/gps_system/tests/Makefile

@@ -2,17 +2,25 @@ CC ?= gcc
 CFLAGS ?= -O2 -std=c11 -Wall -Wextra -Werror
 
 ROOT := ..
-TARGET := test_imu_calibration
+TARGETS := test_imu_calibration test_gps_nav_epoch test_plic_warm_reset
 
 .PHONY: all run clean
 
-all: $(TARGET)
+all: $(TARGETS)
 
-$(TARGET): test_imu_calibration.c $(ROOT)/src/imu/imu_calibration.c
+test_imu_calibration: test_imu_calibration.c $(ROOT)/src/imu/imu_calibration.c
 	$(CC) $(CFLAGS) -I$(ROOT)/header $^ -lm -o $@
 
-run: $(TARGET)
-	./$(TARGET)
+test_gps_nav_epoch: test_gps_nav_epoch.c $(ROOT)/src/gps/gps_nav_epoch.c
+	$(CC) $(CFLAGS) -I$(ROOT)/header $^ -lm -o $@
+
+test_plic_warm_reset: test_plic_warm_reset.c $(ROOT)/../bsp/drivers/plic.c
+	$(CC) $(CFLAGS) -Ifake_bsp -I$(ROOT)/../bsp/include $^ -o $@
+
+run: $(TARGETS)
+	./test_imu_calibration
+	./test_gps_nav_epoch
+	./test_plic_warm_reset
 
 clean:
-	rm -f $(TARGET)
+	rm -f $(TARGETS)