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openwrt-xburst/target/linux/brcm63xx/files/arch/mips/bcm63xx/early_printk.c

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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
*/
#include <linux/init.h>
#include <bcm63xx_io.h>
#include <bcm63xx_regs.h>
static void __init wait_xfered(void)
{
unsigned int val;
/* wait for any previous char to be transmitted */
do {
val = bcm_uart0_readl(UART_IR_REG);
if (val & UART_IR_STAT(UART_IR_TXEMPTY))
break;
} while (1);
}
void __init prom_putchar(char c)
{
wait_xfered();
bcm_uart0_writel(c, UART_FIFO_REG);
wait_xfered();
}