From 447b2aa4770c8e494071bbe00199252f2d102d3f Mon Sep 17 00:00:00 2001 From: Wu Zhangjin Date: Thu, 2 Jul 2009 23:20:20 +0800 Subject: [PATCH] --- yaml --- r: 162823 b: refs/heads/master c: f6a2740d0c1b3fd0d3cc8ec17e232f82f2d8b14c h: refs/heads/master i: 162821: f6b3d51e59331f3d8bb9ff2a0a40d210b70d0733 162819: 9075afe0f71d6196783af9732ad90608b9d2a6fd 162815: 78e05b1b98d8389846332ab559dacdf02bbac17c v: v3 --- [refs] | 2 +- trunk/arch/mips/lemote/lm2e/Makefile | 5 +++ trunk/arch/mips/lemote/lm2e/early_printk.c | 41 ++++++++++++++++++++++ 3 files changed, 47 insertions(+), 1 deletion(-) create mode 100644 trunk/arch/mips/lemote/lm2e/early_printk.c diff --git a/[refs] b/[refs] index a5e4b66fe048..3959c3681b54 100644 --- a/[refs] +++ b/[refs] @@ -1,2 +1,2 @@ --- -refs/heads/master: 95ff7c955376d5bd52f044f445ea04eab4fb0f9a +refs/heads/master: f6a2740d0c1b3fd0d3cc8ec17e232f82f2d8b14c diff --git a/trunk/arch/mips/lemote/lm2e/Makefile b/trunk/arch/mips/lemote/lm2e/Makefile index b0c03390241d..f19173252d6a 100644 --- a/trunk/arch/mips/lemote/lm2e/Makefile +++ b/trunk/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/trunk/arch/mips/lemote/lm2e/early_printk.c b/trunk/arch/mips/lemote/lm2e/early_printk.c new file mode 100644 index 000000000000..811c7dec1edd --- /dev/null +++ b/trunk/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); +}