| /* 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 |