192     uint32_t mask;  in modify()  local
195     mask    = (uint32_t)((1U << masklen) - 1U); // Now as a mask  in modify()
196     val &= mask;                    // mask unshifted val  in modify()
198     mask <<= lo;                    // mask moves too to field off  in modify()
199     tmp &= ~mask;                   // Clear R[hi:lo]  in modify()
204 static uint32_t modify2(uint32_t tmp, uint32_t mask, uint32_t shift, uint32_t val)  in modify2()  argument
206     mask >>= shift;  in modify2()
207     val &= mask;    // mask unshifted val  in modify2()
209     mask <<= shift; // mask moves too to field off  in modify2()
210     tmp &= ~mask;   // Clear R[hi:lo]  in modify2()
215 void rmw2(volatile uint32_t *addr, uint32_t mask, uint32_t shift, uint32_t val)  in rmw2()  argument
217     *addr = modify2(*addr, mask, shift, val);  in rmw2()
225 static uint32_t extract2(uint32_t data, uint32_t mask, uint32_t shift)  in extract2()  argument
230     mask >>= shift;  in extract2()
231     tmp &= mask; // Knock off other bits  in extract2()
235 static uint32_t rd2(volatile uint32_t *addr, uint32_t mask, uint32_t shift)  in rd2()  argument
239     return extract2(data, mask, shift);  in rd2()
244     uint32_t mask;  in set_iomux_helper()  local
259     mask    = (uint32_t)((1U << masklen) - 1U);  in set_iomux_helper()
260     val     = mask;  in set_iomux_helper()
261     mask <<= lo;  in set_iomux_helper()
264         rmw2(addr, mask, lo, val);  in set_iomux_helper()
265     } while (rd2(addr, mask, lo) != val);  in set_iomux_helper()