target/linux/adm8668/files/arch/mips/adm8668/early_printk.c

   1 #include <linux/io.h>
   2 #include <linux/serial_core.h>
   3 #include <adm8668.h>
   4
   5 #define UART_READ(r) \
   6         __raw_readl((void __iomem *)(KSEG1ADDR(ADM8668_UART0_BASE) + (r)))
   7
   8 #define UART_WRITE(v, r) \
   9         __raw_writel((v), (void __iomem *)(KSEG1ADDR(ADM8668_UART0_BASE) + (r)))
  10
  11 void prom_putchar(char c)
  12 {
  13         UART_WRITE(c, UART_DR_REG);
  14         while ((UART_READ(UART_FR_REG) & UART_TX_FIFO_FULL) != 0)
  15                 ;
  16 }