2 * Low-level Power Management code.
4 * Copyright (C) 2008 Atmel Corporation
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #include <asm/asm-offsets.h>
12 #include <asm/thread_info.h>
13 #include <asm/arch/pm.h>
15 .section .bss, "wa", @nobits
16 .global disable_idle_sleep
17 .type disable_idle_sleep, @object
20 .size disable_idle_sleep, . - disable_idle_sleep
22 /* Keep this close to the irq handlers */
23 .section .irq.text, "ax", @progbits
26 * void cpu_enter_idle(void)
28 * Put the CPU into "idle" mode, in which it will consume
29 * significantly less power.
31 * If an interrupt comes along in the window between
32 * unmask_interrupts and the sleep instruction below, the
33 * interrupt code will adjust the return address so that we
34 * never execute the sleep instruction. This is required
35 * because the AP7000 doesn't unmask interrupts when entering
36 * sleep modes; later CPUs may not need this workaround.
38 .global cpu_enter_idle
39 .type cpu_enter_idle, @function
44 bld r9, TIF_NEED_RESCHED
46 sbr r9, TIF_CPU_GOING_TO_SLEEP
50 .size cpu_idle_sleep, . - cpu_idle_sleep
53 * Common return path for PM functions that don't run from
56 .global cpu_idle_skip_sleep
57 .type cpu_idle_skip_sleep, @function
61 cbr r9, TIF_CPU_GOING_TO_SLEEP
66 .size cpu_idle_skip_sleep, . - cpu_idle_skip_sleep