LINUX_REBOOT_CMD_RESTART 0x01234567
LINUX_REBOOT_CMD_HALT 0xCDEF0123
LINUX_REBOOT_CMD_CAD_ON 0x89ABCDEF
LINUX_REBOOT_CMD_CAD_OFF 0x00000000
LINUX_REBOOT_CMD_POWER_OFF 0x4321FEDC
LINUX_REBOOT_CMD_RESTART2 0xA1B2C3D4
LINUX_REBOOT_CMD_SW_SUSPEND 0xD000FCE2
LINUX_REBOOT_CMD_KEXEC 0x45584543