[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / arm / mach-msm / idle.S

/* arch/arm/mach-msm/include/mach/idle.S
 *
 * 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.
 *
 */ 
		
#include <linux/linkage.h>
#include <asm/assembler.h>

ENTRY(arch_idle)
#ifdef CONFIG_MSM7X00A_IDLE
	mrc     p15, 0, r1, c1, c0, 0    /* read current CR    */
	bic     r0, r1, #(1 << 2)        /* clear dcache bit   */
	bic     r0, r0, #(1 << 12)       /* clear icache bit   */
	mcr     p15, 0, r0, c1, c0, 0    /* disable d/i cache  */

	mov     r0, #0                   /* prepare wfi value  */
	mcr     p15, 0, r0, c7, c10, 0   /* flush the cache    */
	mcr     p15, 0, r0, c7, c10, 4   /* memory barrier     */
	mcr     p15, 0, r0, c7, c0, 4    /* wait for interrupt */

	mcr     p15, 0, r1, c1, c0, 0    /* restore d/i cache  */
#endif
	mov     pc, lr
Commit	Line	Data
a09e64fb	1	/* arch/arm/mach-msm/include/mach/idle.S
3042102a BS	2	*
	3	* Idle processing for MSM7K - work around bugs with SWFI.
	4	*
	5	* Copyright (c) 2007 QUALCOMM Incorporated.
	6	* Copyright (C) 2007 Google, Inc.
	7	*
	8	* This software is licensed under the terms of the GNU General Public
	9	* License version 2, as published by the Free Software Foundation, and
	10	* may be copied, distributed, and modified under those terms.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	*/
	18
	19	#include <linux/linkage.h>
	20	#include <asm/assembler.h>
	21
	22	ENTRY(arch_idle)
	23	#ifdef CONFIG_MSM7X00A_IDLE
	24	mrc p15, 0, r1, c1, c0, 0 /* read current CR */
	25	bic r0, r1, #(1 << 2) /* clear dcache bit */
	26	bic r0, r0, #(1 << 12) /* clear icache bit */
	27	mcr p15, 0, r0, c1, c0, 0 /* disable d/i cache */
	28
	29	mov r0, #0 /* prepare wfi value */
	30	mcr p15, 0, r0, c7, c10, 0 /* flush the cache */
	31	mcr p15, 0, r0, c7, c10, 4 /* memory barrier */
	32	mcr p15, 0, r0, c7, c0, 4 /* wait for interrupt */
	33
	34	mcr p15, 0, r1, c1, c0, 0 /* restore d/i cache */
	35	#endif
	36	mov pc, lr