143 	u32 u;  in read_extra_features()  local
145 	__asm__("mrc p15, 1, %0, c15, c1, 0" : "=r" (u));  in read_extra_features()
147 	return u;  in read_extra_features()
150 static inline void __init write_extra_features(u32 u)  in write_extra_features()  argument
152 	__asm__("mcr p15, 1, %0, c15, c1, 0" : : "r" (u));  in write_extra_features()
185 	u32 u;  in enable_extra_feature()  local
187 	u = read_extra_features();  in enable_extra_feature()
190 		u &= ~CCR_L2C_PREFETCH_DISABLE;  in enable_extra_feature()
192 		u |= CCR_L2C_PREFETCH_DISABLE;  in enable_extra_feature()
198 		u |= CCR_L2C_BURST8_ENABLE;  in enable_extra_feature()
200 		u &= ~CCR_L2C_BURST8_ENABLE;  in enable_extra_feature()
205 	write_extra_features(u);  in enable_extra_feature()