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