4 @ Adapted from stm32f4.s
5 @ STM32L4's flash controller expects double-word writes, has the flash
6 @ controller mapped in a different location with the registers we care about
7 @ moved down from the base address, and has BSY moved to bit 16 of SR.
19 ldr r4, [r0] /* copy doubleword from source to target */
25 ldrh r4, [r3, #0x12] /* high half of status register */
26 tst r4, #1 /* BSY = bit 16 */