bootrom/sdboot/include/devices/uart.h

   1 // See LICENSE for license details.
   2
   3 #ifndef _SIFIVE_UART_H
   4 #define _SIFIVE_UART_H
   5
   6 /* Register offsets */
   7 #define UART_REG_TXFIFO         0x00
   8 #define UART_REG_RXFIFO         0x04
   9 #define UART_REG_TXCTRL         0x08
  10 #define UART_REG_RXCTRL         0x0c
  11 #define UART_REG_IE             0x10
  12 #define UART_REG_IP             0x14
  13 #define UART_REG_DIV            0x18
  14
  15 /* TXCTRL register */
  16 #define UART_TXEN               0x1
  17 #define UART_TXNSTOP            0x2
  18 #define UART_TXWM(x)            (((x) & 0xffff) << 16)
  19
  20 /* RXCTRL register */
  21 #define UART_RXEN               0x1
  22 #define UART_RXWM(x)            (((x) & 0xffff) << 16)
  23
  24 /* IP register */
  25 #define UART_IP_TXWM            0x1
  26 #define UART_IP_RXWM            0x2
  27
  28 #endif /* _SIFIVE_UART_H */