CDM_BIT
#define PORCFG_SYS_PLL_BYPASS CDM_BIT(15) /* PLL bypassed, xtal direct */
#define PORCFG_SYS_PLL_CFG_1 CDM_BIT(24) /* doubles VCO only (no clk effect) */
#define PORCFG_SYS_PLL_CFG_0 CDM_BIT(25) /* 0: fsys=16x, 1: fsys=12x xtal */
#define PORCFG_XLB_CLK_SEL CDM_BIT(26) /* 0: XLB=fsys/4, 1: XLB=fsys/8 */
#define CFG_XLB_CLK_SEL CDM_BIT(15) /* read-only mirror of PORCFG */
#define CFG_IPB_CLK_SEL CDM_BIT(23) /* 0: IPB=XLB, 1: IPB=XLB/2 */