25  * mask = bitfield_mask(10, 5);
31  * mask = bitfield_mask(10, 5);
32  * old = bitfield_extract_by_mask(old_reg_val, mask);
33  * new_reg_val = bitfield_replace_by_mask(old_reg_val, mask, new);
41 /* Produces a mask of set bits covering a range of a uint value */
60 	uint mask = bitfield_mask(shift, width);  in bitfield_replace()  local
62 	return (reg_val & ~mask) | ((bitfield_val << shift) & mask);  in bitfield_replace()
65 /* Produces a shift of the bitfield given a mask */
66 static inline uint bitfield_shift(uint mask)  in bitfield_shift()  argument
68 	return mask ? ffs(mask) - 1 : 0;  in bitfield_shift()
72 static inline uint bitfield_extract_by_mask(uint reg_val, uint mask)  in bitfield_extract_by_mask()  argument
74 	uint shift = bitfield_shift(mask);  in bitfield_extract_by_mask()
76 	return (reg_val & mask) >> shift;  in bitfield_extract_by_mask()
83 static inline uint bitfield_replace_by_mask(uint reg_val, uint mask,  in bitfield_replace_by_mask()  argument
86 	uint shift = bitfield_shift(mask);  in bitfield_replace_by_mask()
88 	return (reg_val & ~mask) | ((bitfield_val << shift) & mask);  in bitfield_replace_by_mask()