boot loop after flashing partitions from stock firmware

I have Arch linux installed and have installed android-tools(so fastboot and adb commands are available). Because I had a problem with kingroot I needed to flash the phone to stock. I had stock firmware downloaded and extracted it to see the sin files inside it. I flashed partitions using these commands : fastboot flash system system.sin fastboot flash userdata userdata.sin fastboot flash cache cache.sin fastboot reboot Now the first two succeeded but the third one failed saying partition not found(guess I don't have cache partition for some reason). After that I got stuck in a boot loop. Normally sony Xperia P boots with Sony word and then to Xperia word(which blinks) and then to android but it's stuck in the Sony word. I tried powering off the phone and flashing the boot partition using this command : fastboot flash boot kernel.sin rebooted, the same problem. I tried to flash FOTAKernel but I don't seem to have this partition. I tried also fastboot reboot-bootloader and then reboot but the same. I've read the boot-loop wiki, both Safe mode and recovery mode are unreachable. I would try to flash the other .sin files But I don't know to what partition they belong and google didn't help me to get this information :3 . So what to do ? ## Update ## I forgot to mention that I tried to flash .ftf file using FlashTool 0.9.19.10, this tool didn't work, I click the lightning bolt, I chose the Flash mode, I choose the .ftf file(after putting it in ~/.flashtool/firmwares), after clicking ok it tells me to plug my device in fastboot mode. I click Volumne Up while plugging the device and I see the blue(somewhat purple) Led light on. I wait and wait and even when Flashtool said "Device connected in fastboot mode" it doesn't do anything but telling me to plug my device :3 . ## Device ## Sony xperia P runing android 4.0.4, bootloader is unlocked but the phone is not rooted nor has custom recovery(so no CWM or TWRP here).