CDCLK_SQUASH_WINDOW_SIZE_MASK
size = REG_FIELD_GET(CDCLK_SQUASH_WINDOW_SIZE_MASK, squash_ctl) + 1;
#define CDCLK_SQUASH_WINDOW_SIZE(x) REG_FIELD_PREP(CDCLK_SQUASH_WINDOW_SIZE_MASK, (x))