cache_hs_t
static cache_hs_t neg_cache_hysteresis_state[2] = { CHI_LOW, CHI_LOW };
static cache_hs_t pos_cache_hysteresis_state[2] = { CHI_LOW, CHI_LOW };
static cache_hs_t exc_cache_hysteresis_state[2] = { CHI_LOW, CHI_LOW };