Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753018AbZGBPUp (ORCPT ); Thu, 2 Jul 2009 11:20:45 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750822AbZGBPUf (ORCPT ); Thu, 2 Jul 2009 11:20:35 -0400 Received: from ey-out-1920.google.com ([74.125.78.150]:22853 "EHLO ey-out-1920.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750813AbZGBPUe (ORCPT ); Thu, 2 Jul 2009 11:20:34 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; b=PhfHUoL6M1BwwR7KkK5jw3CvNcNjxO0pZz3XqaibvLrjzhzIrvGk7OmPOjX9cWNLVy b3r2j8PKajO5VROpc9nfYlJ8pcW80GlTR/dzEPwo+QJIiOGsI5ehioDdYkTcXH5ffX5u 5zrl6IPE/bzECqfzwnPrHWpLMAujYbvmXCQOY= From: Wu Zhangjin To: linux-kernel@vger.kernel.org, linux-mips@linux-mips.org, ralf@linux-mips.org, Jason Wessel Cc: Wu Zhangjin , Yan Hua , Philippe Vachon , Zhang Le , Zhang Fuxin , loongson-dev , Liu Junliang , Erwan Lerale , Arnaud Patard Subject: [PATCH v4 03/16] [loongson] early_printk: add new implmentation Date: Thu, 2 Jul 2009 23:20:20 +0800 Message-Id: <9e23b4150f183c0817f2abbb95525279c2006a83.1246546684.git.wuzhangjin@gmail.com> X-Mailer: git-send-email 1.6.2.1 In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2483 Lines: 82 From: Wu Zhangjin This patch is based on the implementation in the lm2e-fixes branch of Philippe's git://git.linux-cisco.org/linux-mips.git and the malta-specific early_printk implementation. Signed-off-by: Wu Zhangjin --- arch/mips/lemote/lm2e/Makefile | 5 ++++ arch/mips/lemote/lm2e/early_printk.c | 41 ++++++++++++++++++++++++++++++++++ 2 files changed, 46 insertions(+), 0 deletions(-) create mode 100644 arch/mips/lemote/lm2e/early_printk.c diff --git a/arch/mips/lemote/lm2e/Makefile b/arch/mips/lemote/lm2e/Makefile index b0c0339..f191732 100644 --- a/arch/mips/lemote/lm2e/Makefile +++ b/arch/mips/lemote/lm2e/Makefile @@ -4,4 +4,9 @@ obj-y += setup.o prom.o reset.o irq.o pci.o bonito-irq.o mem.o +# +# Early printk support +# +obj-$(CONFIG_EARLY_PRINTK) += early_printk.o + EXTRA_CFLAGS += -Werror diff --git a/arch/mips/lemote/lm2e/early_printk.c b/arch/mips/lemote/lm2e/early_printk.c new file mode 100644 index 0000000..811c7de --- /dev/null +++ b/arch/mips/lemote/lm2e/early_printk.c @@ -0,0 +1,41 @@ +/* early printk support + * + * Copyright (c) 2009 Philippe Vachon + * Copyright (C) 2009 Lemote Inc. & Insititute of Computing Technology + * Author: Wu Zhangjin, wuzj@lemote.com + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ +#include +#include +#include + +#include + +#define UART_BASE (BONITO_PCIIO_BASE + 0x3f8) + +#define PORT(base, offset) (u8 *)(base + offset) + +static inline unsigned int serial_in(phys_addr_t base, int offset) +{ + return readb(PORT(base, offset)); +} + +static inline void serial_out(phys_addr_t base, int offset, int value) +{ + writeb(value, PORT(base, offset)); +} + +void prom_putchar(char c) +{ + phys_addr_t uart_base = + (phys_addr_t) ioremap_nocache(UART_BASE, 8); + + while ((serial_in(uart_base, UART_LSR) & UART_LSR_THRE) == 0) + ; + + serial_out(uart_base, UART_TX, c); +} -- 1.6.2.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/