HIDBIT
#define HID0_64_ONE_PPC HIDBIT(0) /* one instruction per dispatch group */
#define HID0_64_DO_SNGL HIDBIT(1) /* single group completion mode */
#define HID0_64_ISYNCSC HIDBIT(2) /* Disable isync scoreboard optimization */
#define HID0_64_SER_GP HIDBIT(3) /* Serialize group dispatch */
#define HID0_64_DEEPNAP HIDBIT(7) /* Enable deep nap mode (970) */
#define HID0_64_DOZE HIDBIT(8) /* Enable doze mode */
#define HID0_64_NAP HIDBIT(9) /* Enable nap mode */
#define HID0_64_DPM HIDBIT(11) /* Enable Dynamic power management */
#define HID0_64_TG HIDBIT(13) /* Perfmon threshold granularity control */
#define HID0_64_HNG_DIS HIDBIT(14) /* Disable processor hang-detection */
#define HID0_64_NHR HIDBIT(15) /* No Hard Reset */
#define HID0_64_INORDER HIDBIT(16) /* Serialized group issue mode */
#define HID0_64_TB_CTRL HIDBIT(18) /* TB keeps running if CPU stopped */
#define HID0_64_EX_TBEN HIDBIT(19) /* timebase runs at external clock */
#define HID0_64_CIABREN HIDBIT(22) /* enable CIABR register */
#define HID0_64_HDICEEN HIDBIT(23) /* hypervisor decrementer enable */
#define HID0_64_EN_ATTN HIDBIT(31) /* support processor attention inst. */
#define HID0_64_EN_MCHK HIDBIT(32) /* ext. mchk interrupts */