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26 lines
433 B
26 lines
433 B
#include <linux/console.h>
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#include <linux/init.h>
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#include <linux/serial_reg.h>
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#include <asm/io.h>
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#define PORT(offset) (0x3f8 + (offset))
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static inline unsigned int serial_in(int offset)
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{
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return inb(PORT(offset));
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}
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static inline void serial_out(int offset, int value)
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{
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outb(value, PORT(offset));
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}
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int prom_putchar(char c)
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{
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while ((serial_in(UART_LSR) & UART_LSR_THRE) == 0)
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;
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serial_out(UART_TX, c);
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return 1;
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}
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