mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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65 lines
1.9 KiB
C
65 lines
1.9 KiB
C
/*
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* Carsten Langgaard, carstenl@mips.com
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* Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
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*
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* This program is free software; you can distribute it and/or modify it
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* under the terms of the GNU General Public License (Version 2) as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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* Display routines for display messages in MIPS boards ascii display.
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*/
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#include <linux/compiler.h>
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#include <linux/timer.h>
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#include <asm/io.h>
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#include <asm/mips-boards/generic.h>
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#include <asm/mips-boards/prom.h>
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extern const char display_string[];
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static unsigned int display_count;
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static unsigned int max_display_count;
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void mips_display_message(const char *str)
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{
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static unsigned int __iomem *display = NULL;
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int i;
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if (unlikely(display == NULL))
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display = ioremap(ASCII_DISPLAY_POS_BASE, 16*sizeof(int));
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for (i = 0; i <= 14; i=i+2) {
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if (*str)
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__raw_writel(*str++, display + i);
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else
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__raw_writel(' ', display + i);
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}
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}
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static void scroll_display_message(unsigned long data);
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static DEFINE_TIMER(mips_scroll_timer, scroll_display_message, HZ, 0);
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static void scroll_display_message(unsigned long data)
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{
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mips_display_message(&display_string[display_count++]);
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if (display_count == max_display_count)
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display_count = 0;
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mod_timer(&mips_scroll_timer, jiffies + HZ);
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}
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void mips_scroll_message(void)
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{
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del_timer_sync(&mips_scroll_timer);
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max_display_count = strlen(display_string) + 1 - 8;
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mod_timer(&mips_scroll_timer, jiffies + 1);
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}
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