From daa2a00263122297df1070eb1c5d5421b001463a Mon Sep 17 00:00:00 2001 From: Antony Pavlov Date: Thu, 22 May 2014 23:48:45 +0400 Subject: ARM: uemd: add DEBUG_LL support Signed-off-by: Antony Pavlov Signed-off-by: Sascha Hauer --- arch/arm/mach-uemd/include/mach/debug_ll.h | 42 ++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 arch/arm/mach-uemd/include/mach/debug_ll.h (limited to 'arch/arm/mach-uemd') diff --git a/arch/arm/mach-uemd/include/mach/debug_ll.h b/arch/arm/mach-uemd/include/mach/debug_ll.h new file mode 100644 index 0000000000..ce182446b0 --- /dev/null +++ b/arch/arm/mach-uemd/include/mach/debug_ll.h @@ -0,0 +1,42 @@ +/* + * Copyright (C) 2014 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. + * + */ + +/** @file + * This File contains declaration for early output support + */ +#ifndef __INCLUDE_ARCH_DEBUG_LL_H__ +#define __INCLUDE_ARCH_DEBUG_LL_H__ + +#include +#include + +#define DEBUG_LL_UART_ADDR UEMD_UART0_BASE +#define DEBUG_LL_UART_RSHFT 2 + +#define rbr (0 << DEBUG_LL_UART_RSHFT) +#define lsr (5 << DEBUG_LL_UART_RSHFT) +#define LSR_THRE 0x20 /* Xmit holding register empty */ + +static inline void PUTC_LL(char ch) +{ + while (!(__raw_readb(DEBUG_LL_UART_ADDR + lsr) & LSR_THRE)) + ; + + __raw_writeb(ch, DEBUG_LL_UART_ADDR + rbr); +} + +#endif /* __INCLUDE_ARCH_DEBUG_LL_H__ */ -- cgit v1.2.3