Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/SiFive/sifive_hifive_unmatched_a00/sifive_uart0_1/ie#0x0
UART interrupt enable
Transmit watermark interrupt enable
Receive watermark interrupt enable
https://github.com/cmsis-svd/cmsis-svd-data