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Nicolas Pitre
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Nicolas Pitre
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Jan 20, 2012
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refs/heads/master: 4a3ea24405de36181b6ce074e110ee7efe110297 | ||
refs/heads/master: 25eb433ab1aaa981cbb43b1d10c0d9377a50e8c9 |
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/* arch/arm/mach-msm/idle.c | ||
* | ||
* Idle processing for MSM7K - work around bugs with SWFI. | ||
* | ||
* Copyright (c) 2007 QUALCOMM Incorporated. | ||
* Copyright (C) 2007 Google, Inc. | ||
* | ||
* This software is licensed under the terms of the GNU General Public | ||
* License version 2, as published by the Free Software Foundation, and | ||
* may be copied, distributed, and modified under those terms. | ||
* | ||
* This program is distributed in the hope that it will be useful, | ||
* but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
* GNU General Public License for more details. | ||
* | ||
*/ | ||
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#include <linux/init.h> | ||
#include <asm/system.h> | ||
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static void msm_idle(void) | ||
{ | ||
#ifdef CONFIG_MSM7X00A_IDLE | ||
asm volatile ( | ||
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"mrc p15, 0, r1, c1, c0, 0 /* read current CR */ \n\t" | ||
"bic r0, r1, #(1 << 2) /* clear dcache bit */ \n\t" | ||
"bic r0, r0, #(1 << 12) /* clear icache bit */ \n\t" | ||
"mcr p15, 0, r0, c1, c0, 0 /* disable d/i cache */ \n\t" | ||
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"mov r0, #0 /* prepare wfi value */ \n\t" | ||
"mcr p15, 0, r0, c7, c10, 0 /* flush the cache */ \n\t" | ||
"mcr p15, 0, r0, c7, c10, 4 /* memory barrier */ \n\t" | ||
"mcr p15, 0, r0, c7, c0, 4 /* wait for interrupt */ \n\t" | ||
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"mcr p15, 0, r1, c1, c0, 0 /* restore d/i cache */ \n\t" | ||
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: : : "r0","r1" ); | ||
#endif | ||
} | ||
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static int __init msm_idle_init(void) | ||
{ | ||
arm_pm_idle = msm_idle; | ||
return 0; | ||
} | ||
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arch_initcall(msm_idle_init); |
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