From 40492a0c1305835c996e15eb1cce2406473ae76d Mon Sep 17 00:00:00 2001 From: Antony Pavlov Date: Sat, 12 May 2012 11:15:03 +0400 Subject: MIPS: add common header file for DEBUG_LL via NS16550 Signed-off-by: Antony Pavlov Signed-off-by: Sascha Hauer --- arch/mips/include/debug_ll_ns16550.h | 40 ++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 arch/mips/include/debug_ll_ns16550.h (limited to 'arch/mips') diff --git a/arch/mips/include/debug_ll_ns16550.h b/arch/mips/include/debug_ll_ns16550.h new file mode 100644 index 0000000000..9280219449 --- /dev/null +++ b/arch/mips/include/debug_ll_ns16550.h @@ -0,0 +1,40 @@ +/* + * Copyright (C) 2012 Antony Pavlov + * + * 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 + +#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__ */ -- cgit v1.2.3