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MIPS: add common header file for DEBUG_LL via NS16550 

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Antony Pavlov 2012-05-12 11:15:03 +04:00 committed by Sascha Hauer
parent f49387add0
commit 40492a0c13
1 changed files with 40 additions and 0 deletions
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arch/mips/include/debug_ll_ns16550.h Normal file
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/*
* Copyright (C) 2012 Antony Pavlov <antonynpavlov@gmail.com>
*
* This file is part of barebox.
* See file CREDITS for list of people who contributed to this project.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/** @file
* This file contains declaration for early output support
*/
#ifndef __INCLUDE_ARCH_DEBUG_LL_NS16550_H__
#define __INCLUDE_ARCH_DEBUG_LL_NS16550_H__
#include <asm/io.h>
#define rbr (0 << DEBUG_LL_UART_SHIFT)
#define lsr (5 << DEBUG_LL_UART_SHIFT)
#define LSR_THRE 0x20 /* Xmit holding register empty */
static __inline__ void putc(char ch)
{
while (!(__raw_readb((u8 *)DEBUG_LL_UART_ADDR + lsr) & LSR_THRE));
__raw_writeb(ch, (u8 *)DEBUG_LL_UART_ADDR + rbr);
}
#endif /* __INCLUDE_ARCH_DEBUG_LL_NS16550_H__ */