RESERVED_IPC 20 arch/x86/include/asm/intel_punit_ipc.h #define IPC_PUNIT_CMD_TYPE_MASK (RESERVED_IPC << IPC_TYPE_OFFSET) RESERVED_IPC 46 drivers/platform/x86/intel_punit_ipc.c void __iomem *base[RESERVED_IPC][BASE_MAX];