55 lines
1.3 KiB
C
55 lines
1.3 KiB
C
/* arch/arm/mach-s3c2410/include/mach/system.h
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*
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* Copyright (c) 2003 Simtec Electronics
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* Ben Dooks <ben@simtec.co.uk>
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*
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* S3C2410 - System function defines and includes
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*
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* This program is free software; you can redistribute it and/or modify
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* it 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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#include <linux/io.h>
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#include <mach/hardware.h>
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#include <mach/map.h>
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#include <mach/idle.h>
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#include <mach/regs-clock.h>
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void (*s3c24xx_idle)(void);
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void s3c24xx_default_idle(void)
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{
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unsigned long tmp;
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int i;
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/* idle the system by using the idle mode which will wait for an
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* interrupt to happen before restarting the system.
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*/
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/* Warning: going into idle state upsets jtag scanning */
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__raw_writel(__raw_readl(S3C2410_CLKCON) | S3C2410_CLKCON_IDLE,
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S3C2410_CLKCON);
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/* the samsung port seems to do a loop and then unset idle.. */
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for (i = 0; i < 50; i++) {
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tmp += __raw_readl(S3C2410_CLKCON); /* ensure loop not optimised out */
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}
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/* this bit is not cleared on re-start... */
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__raw_writel(__raw_readl(S3C2410_CLKCON) & ~S3C2410_CLKCON_IDLE,
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S3C2410_CLKCON);
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}
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static void arch_idle(void)
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{
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if (s3c24xx_idle != NULL)
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(s3c24xx_idle)();
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else
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s3c24xx_default_idle();
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}
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