path: root/arch/arm/mach-mx6/mx6_suspend.S

/*
 * Copyright (C) 2010-2012 Freescale Semiconductor, Inc. All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.

 * 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.

 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include <linux/linkage.h>
#include <mach/hardware.h>
#include <asm/memory.h>
#include <asm/hardware/cache-l2x0.h>
#include "src-reg.h"

#define ARM_CTRL_DCACHE		(1 << 2)
#define ARM_CTRL_ICACHE		(1 << 12)
#define ARM_AUXCR_L2EN		(1 << 1)
#define TTRBIT_MASK 		0xffffc000
#define TABLE_INDEX_MASK 	0xfff00000
#define TABLE_ENTRY 		0x00000c02
#define CACHE_DISABLE_MASK 	0xfffffffb
#define MMDC_MAPSR_OFFSET 	0x404
#define MMDC_MAPSR_PSS 		(1 << 4)
#define MMDC_MAPSR_PSD 		(1 << 0)
#define IRAM_SUSPEND_SIZE 	(1 << 12)

/*************************************************************
mx6_suspend:

Suspend the processor (eg, wait for interrupt).
Set the DDR into Self Refresh
IRQs are already disabled.

The following code contain both standby and
dormant mode for MX6, decided by the parameter
passed in r0:
see define in include/linux/suspend.h
1 -> cpu enter stop mode;
3 -> cpu enter dormant mode.
r1: iram_paddr
r2: suspend_iram_base
*************************************************************/
	.macro	sl_ddr_io_save

	ldr	r4, [r1, #0x30c] /* DRAM_DQM0 */
	ldr	r5, [r1, #0x310] /* DRAM_DQM1 */
	ldr	r6, [r1, #0x314] /* DRAM_DQM2 */
	ldr	r7, [r1, #0x318] /* DRAM_DQM3 */
	stmfd	r0!, {r4-r7}

	ldr	r4, [r1, #0x344] /* DRAM_SDQS0 */
	ldr	r5, [r1, #0x348] /* DRAM_SDQS1 */
	ldr	r6, [r1, #0x34c] /* DRAM_SDQS2 */
	ldr	r7, [r1, #0x350] /* DRAM_SDQS3 */
	stmfd	r0!, {r4-r7}

	ldr	r4, [r1, #0x5c4] /* GPR_B0DS */
	ldr	r5, [r1, #0x5cc] /* GPR_B1DS */
	ldr	r6, [r1, #0x5d4] /* GPR_B2DS */
	ldr	r7, [r1, #0x5d8] /* GPR_B3DS */
	stmfd	r0!, {r4-r7}

	ldr	r4, [r1, #0x300] /* DRAM_CAS */
	ldr	r5, [r1, #0x31c] /* DRAM_RAS */
	ldr	r6, [r1, #0x338] /* DRAM_SDCLK_0 */
	ldr r7, [r1, #0x5ac] /* GPR_ADDS*/
	stmfd	r0!, {r4-r7}

	ldr	r4, [r1, #0x5b0] /* DDRMODE_CTL */
	ldr	r5, [r1, #0x5c0] /* DDRMODE */
	ldr	r6, [r1, #0x33c] /* DRAM_SODT0*/
	ldr	r7, [r1, #0x340] /* DRAM_SODT1*/
	stmfd	r0!, {r4-r7}

	ldr	r4, [r1, #0x330] /* DRAM_SDCKE0 */
	ldr	r5, [r1, #0x334] /* DRAM_SDCKE1 */
	ldr	r6, [r1, #0x320] /* DRAM_RESET */
	stmfd	r0!, {r4-r6}

	.endm

	.macro	sl_ddr_io_restore

	ldmea	r0!, {r4-r7}
	str	r4, [r1, #0x30c] /* DRAM_DQM0 */
	str	r5, [r1, #0x310] /* DRAM_DQM1 */
	str	r6, [r1, #0x314] /* DRAM_DQM2 */
	str	r7, [r1, #0x318] /* DRAM_DQM3 */

	ldmea	r0!, {r4-r7}
	str	r4, [r1, #0x344] /* DRAM_SDQS0 */
	str	r5, [r1, #0x348] /* DRAM_SDQS1 */
	str	r6, [r1, #0x34c] /* DRAM_SDQS2 */
	str	r7, [r1, #0x350] /* DRAM_SDQS3 */

	ldmea	r0!, {r4-r7}
	str	r4, [r1, #0x5c4] /* GPR_B0DS */
	str	r5, [r1, #0x5cc] /* GPR_B1DS */
	str r6, [r1, #0x5d4] /* GPR_B2DS */
	str r7, [r1, #0x5d8] /* GPR_B3DS */

	ldmea	r0!, {r4-r7}
	str	r4, [r1, #0x300] /* DRAM_CAS */
	str	r5, [r1, #0x31c] /* DRAM_RAS */
	str	r6, [r1, #0x338] /* DRAM_SDCLK_0 */
	str r7, [r1, #0x5ac] /* GPR_ADDS*/

	ldmea	r0!, {r4-r7}
	str	r4, [r1, #0x5b0] /* DDRMODE_CTL */
	str	r5, [r1, #0x5c0] /* DDRMODE */
	str	r6, [r1, #0x33c] /* DRAM_SODT0*/
	str	r7, [r1, #0x340] /* DRAM_SODT1*/

	ldmea	r0!, {r4-r6}
	str	r4, [r1, #0x330] /* DRAM_SDCKE0 */
	str	r5, [r1, #0x334] /* DRAM_SDCKE1 */
	str	r6, [r1, #0x320] /* DRAM_RESET */

	.endm

	.macro	sl_ddr_io_set_lpm

	mov	r0, #0
	str	r0, [r1, #0x30c] /* DRAM_DQM0 */
	str	r0, [r1, #0x310] /* DRAM_DQM1 */
	str	r0, [r1, #0x314] /* DRAM_DQM2 */
	str	r0, [r1, #0x318] /* DRAM_DQM3 */

	/* Make sure the Pull Ups are enabled.
	 * So only reduce the drive stength, but
	 * leave the pull-ups in the original state.
	 * This is required for LPDDR2.
	 */
	ldr	r0, [r1, #0x344]
	orr	r0, r0, #0x3000
	str	r0, [r1, #0x344] /* DRAM_SDQS0 */
	str	r0, [r1, #0x348] /* DRAM_SDQS1 */
	str	r0, [r1, #0x34c] /* DRAM_SDQS2 */
	str	r0, [r1, #0x350] /* DRAM_SDQS3 */

	str	r0, [r1, #0x5c4] /* GPR_B0DS */
	str	r0, [r1, #0x5cc] /* GPR_B1DS */
	str r0, [r1, #0x5d4] /* GPR_B2DS */
	str r0, [r1, #0x5d8] /* GPR_B3DS */

	str	r0, [r1, #0x300] /* DRAM_CAS */
	str	r0, [r1, #0x31c] /* DRAM_RAS */
	str	r0, [r1, #0x338] /* DRAM_SDCLK_0 */
	str r0, [r1, #0x5ac] /* GPR_ADDS*/

	str	r0, [r1, #0x5b0] /* DDRMODE_CTL */
	str	r0, [r1, #0x5c0] /* DDRMODE */
	str	r0, [r1, #0x33c] /* DRAM_SODT0*/
	str	r0, [r1, #0x340] /* DRAM_SODT1*/

	mov	r0, #0x80000
	str	r0, [r1, #0x320] /* DRAM_RESET */
	mov	r0, #0x1000
	str	r0, [r1, #0x330] /* DRAM_SDCKE0 */
	str	r0, [r1, #0x334] /* DRAM_SDCKE1 */

	.endm

	.macro	dl_ddr_io_save

	ldr	r4, [r1, #0x470] /* DRAM_DQM0 */
	ldr	r5, [r1, #0x474] /* DRAM_DQM1 */
	ldr	r6, [r1, #0x478] /* DRAM_DQM2 */
	ldr	r7, [r1, #0x47c] /* DRAM_DQM3 */
	stmfd	r0!, {r4-r7}

	ldr	r4, [r1, #0x480] /* DRAM_DQM4 */
	ldr	r5, [r1, #0x484] /* DRAM_DQM5 */
	ldr	r6, [r1, #0x488] /* DRAM_DQM6 */
	ldr	r7, [r1, #0x48c] /* DRAM_DQM7 */
	stmfd	r0!, {r4-r7}

	ldr	r4, [r1, #0x464] /* DRAM_CAS */
	ldr	r5, [r1, #0x490] /* DRAM_RAS */
	ldr	r6, [r1, #0x4ac] /* DRAM_SDCLK_0 */
	ldr	r7, [r1, #0x4b0] /* DRAM_SDCLK_1 */
	stmfd	r0!, {r4-r7}

	ldr	r5, [r1, #0x750] /* DDRMODE_CTL */
	ldr	r6, [r1, #0x760] /* DDRMODE */
	stmfd	r0!, {r5-r6}

	ldr	r4, [r1, #0x4bc] /* DRAM_SDQS0 */
	ldr	r5, [r1, #0x4c0] /* DRAM_SDQS1 */
	ldr	r6, [r1, #0x4c4] /* DRAM_SDQS2 */
	ldr	r7, [r1, #0x4c8] /* DRAM_SDQS3 */
	stmfd	r0!, {r4-r7}

	ldr	r4, [r1, #0x4cc] /* DRAM_SDQS4 */
	ldr	r5, [r1, #0x4d0] /* DRAM_SDQS5 */
	ldr	r6, [r1, #0x4d4] /* DRAM_SDQS6 */
	ldr	r7, [r1, #0x4d8] /* DRAM_SDQS7 */
	stmfd	r0!, {r4-r7}

	ldr	r4, [r1, #0x764] /* GPR_B0DS */
	ldr	r5, [r1, #0x770] /* GPR_B1DS */
	ldr	r6, [r1, #0x778] /* GPR_B2DS */
	ldr	r7, [r1, #0x77c] /* GPR_B3DS */
	stmfd	r0!, {r4-r7}

	ldr	r4, [r1, #0x780] /* GPR_B4DS */
	ldr	r5, [r1, #0x784] /* GPR_B5DS */
	ldr	r6, [r1, #0x78c] /* GPR_B6DS */
	ldr	r7, [r1, #0x748] /* GPR_B7DS */
	stmfd	r0!, {r4-r7}

	ldr	r5, [r1, #0x74c] /* GPR_ADDS*/
	ldr	r6, [r1, #0x4b4] /* DRAM_SODT0*/
	ldr	r7, [r1, #0x4b8] /* DRAM_SODT1*/
	stmfd	r0!, {r5-r7}

	.endm

	.macro	dl_ddr_io_restore

	ldmea	r0!, {r4-r7}
	str	r4, [r1, #0x470] /* DRAM_DQM0 */
	str	r5, [r1, #0x474] /* DRAM_DQM1 */
	str	r6, [r1, #0x478] /* DRAM_DQM2 */
	str	r7, [r1, #0x47c] /* DRAM_DQM3 */

	ldmea	r0!, {r4-r7}
	str	r4, [r1, #0x480] /* DRAM_DQM4 */
	str	r5, [r1, #0x484] /* DRAM_DQM5 */
	str	r6, [r1, #0x488] /* DRAM_DQM6 */
	str	r7, [r1, #0x48c] /* DRAM_DQM7 */

	ldmea	r0!, {r4-r7}
	str	r4, [r1, #0x464] /* DRAM_CAS */
	str	r5, [r1, #0x490] /* DRAM_RAS */
	str	r6, [r1, #0x4ac] /* DRAM_SDCLK_0 */
	str	r7, [r1, #0x4b0] /* DRAM_SDCLK_1 */

	ldmea	r0!, {r5-r6}
	str	r5, [r1, #0x750] /* DDRMODE_CTL */
	str	r6, [r1, #0x760] /* DDRMODE */

	ldmea	r0!, {r4-r7}
	str	r4, [r1, #0x4bc] /* DRAM_SDQS0 */
	str	r5, [r1, #0x4c0] /* DRAM_SDQS1 */
	str	r6, [r1, #0x4c4] /* DRAM_SDQS2 */
	str	r7, [r1, #0x4c8] /* DRAM_SDQS3 */

	ldmea	r0!, {r4-r7}
	str	r4, [r1, #0x4cc] /* DRAM_SDQS4 */
	str	r5, [r1, #0x4d0] /* DRAM_SDQS5 */
	str	r6, [r1, #0x4d4] /* DRAM_SDQS6 */
	str	r7, [r1, #0x4d8] /* DRAM_SDQS7 */

	ldmea	r0!, {r4-r7}
	str	r4, [r1, #0x764] /* GPR_B0DS */
	str	r5, [r1, #0x770] /* GPR_B1DS */
	str	r6, [r1, #0x778] /* GPR_B2DS */
	str	r7, [r1, #0x77c] /* GPR_B3DS */

	ldmea	r0!, {r4-r7}
	str	r4, [r1, #0x780] /* GPR_B4DS */
	str	r5, [r1, #0x784] /* GPR_B5DS */
	str	r6, [r1, #0x78c] /* GPR_B6DS */
	str	r7, [r1, #0x748] /* GPR_B7DS */

	ldmea	r0!, {r5-r7}
	str	r5, [r1, #0x74c] /* GPR_ADDS*/
	str	r6, [r1, #0x4b4] /* DRAM_SODT0*/
	str	r7, [r1, #0x4b8] /* DRAM_SODT1*/

	.endm

	.macro	dl_ddr_io_set_lpm

	mov	r0, #0
	str	r0, [r1, #0x470] /* DRAM_DQM0 */
	str	r0, [r1, #0x474] /* DRAM_DQM1 */
	str	r0, [r1, #0x478] /* DRAM_DQM2 */
	str	r0, [r1, #0x47c] /* DRAM_DQM3 */

	str	r0, [r1, #0x480] /* DRAM_DQM4 */
	str	r0, [r1, #0x484] /* DRAM_DQM5 */
	str	r0, [r1, #0x488] /* DRAM_DQM6 */
	str	r0, [r1, #0x48c] /* DRAM_DQM7 */

	str	r0, [r1, #0x464] /* DRAM_CAS */
	str	r0, [r1, #0x490] /* DRAM_RAS */
	str	r0, [r1, #0x4ac] /* DRAM_SDCLK_0 */
	str	r0, [r1, #0x4b0] /* DRAM_SDCLK_1 */

	str	r0, [r1, #0x750] /* DDRMODE_CTL */
	str	r0, [r1, #0x760] /* DDRMODE */

	str	r0, [r1, #0x4bc] /* DRAM_SDQS0 */
	str	r0, [r1, #0x4c0] /* DRAM_SDQS1 */
	str	r0, [r1, #0x4c4] /* DRAM_SDQS2 */
	str	r0, [r1, #0x4c8] /* DRAM_SDQS3 */

	str	r0, [r1, #0x4cc] /* DRAM_SDQS4 */
	str	r0, [r1, #0x4d0] /* DRAM_SDQS5 */
	str	r0, [r1, #0x4d4] /* DRAM_SDQS6 */
	str	r0, [r1, #0x4d8] /* DRAM_SDQS7 */

	str	r0, [r1, #0x764] /* GPR_B0DS */
	str	r0, [r1, #0x770] /* GPR_B1DS */
	str	r0, [r1, #0x778] /* GPR_B2DS */
	str	r0, [r1, #0x77c] /* GPR_B3DS */

	str	r0, [r1, #0x780] /* GPR_B4DS */
	str	r0, [r1, #0x784] /* GPR_B5DS */
	str	r0, [r1, #0x78c] /* GPR_B6DS */
	str	r0, [r1, #0x748] /* GPR_B7DS */

	str	r0, [r1, #0x74c] /* GPR_ADDS*/
	str	r0, [r1, #0x4b4] /* DRAM_SODT0*/
	str	r0, [r1, #0x4b8] /* DRAM_SODT1*/

	.endm

	.macro	dq_ddr_io_save

	ldr	r4, [r1, #0x5ac] /* DRAM_DQM0 */
	ldr	r5, [r1, #0x5b4] /* DRAM_DQM1 */
	ldr	r6, [r1, #0x528] /* DRAM_DQM2 */
	ldr	r7, [r1, #0x520] /* DRAM_DQM3 */
	stmfd	r0!, {r4-r7}

	ldr	r4, [r1, #0x514] /* DRAM_DQM4 */
	ldr	r5, [r1, #0x510] /* DRAM_DQM5 */
	ldr	r6, [r1, #0x5bc] /* DRAM_DQM6 */
	ldr	r7, [r1, #0x5c4] /* DRAM_DQM7 */
	stmfd	r0!, {r4-r7}

	ldr	r4, [r1, #0x56c] /* DRAM_CAS */
	ldr	r5, [r1, #0x578] /* DRAM_RAS */
	ldr	r6, [r1, #0x588] /* DRAM_SDCLK_0 */
	ldr	r7, [r1, #0x594] /* DRAM_SDCLK_1 */
	stmfd	r0!, {r4-r7}

	ldr	r5, [r1, #0x750] /* DDRMODE_CTL */
	ldr	r6, [r1, #0x774] /* DDRMODE */
	stmfd	r0!, {r5-r6}

	ldr	r4, [r1, #0x5a8] /* DRAM_SDQS0 */
	ldr	r5, [r1, #0x5b0] /* DRAM_SDQS1 */
	ldr	r6, [r1, #0x524] /* DRAM_SDQS2 */
	ldr	r7, [r1, #0x51c] /* DRAM_SDQS3 */
	stmfd	r0!, {r4-r7}

	ldr	r4, [r1, #0x518] /* DRAM_SDQS4 */
	ldr	r5, [r1, #0x50c] /* DRAM_SDQS5 */
	ldr	r6, [r1, #0x5b8] /* DRAM_SDQS6 */
	ldr	r7, [r1, #0x5c0] /* DRAM_SDQS7 */
	stmfd	r0!, {r4-r7}

	ldr	r4, [r1, #0x784] /* GPR_B0DS */
	ldr	r5, [r1, #0x788] /* GPR_B1DS */
	ldr	r6, [r1, #0x794] /* GPR_B2DS */
	ldr	r7, [r1, #0x79c] /* GPR_B3DS */
	stmfd	r0!, {r4-r7}

	ldr	r4, [r1, #0x7a0] /* GPR_B4DS */
	ldr	r5, [r1, #0x7a4] /* GPR_B5DS */
	ldr	r6, [r1, #0x7a8] /* GPR_B6DS */
	ldr	r7, [r1, #0x748] /* GPR_B7DS */
	stmfd	r0!, {r4-r7}

	ldr	r5, [r1, #0x74c] /* GPR_ADDS*/
	ldr	r6, [r1, #0x59c] /* DRAM_SODT0*/
	ldr	r7, [r1, #0x5a0] /* DRAM_SODT1*/
	stmfd	r0!, {r5-r7}

	.endm

	.macro	dq_ddr_io_restore

	ldmea	r0!, {r4-r7}
	str	r4, [r1, #0x5ac] /* DRAM_DQM0 */
	str	r5, [r1, #0x5b4] /* DRAM_DQM1 */
	str	r6, [r1, #0x528] /* DRAM_DQM2 */
	str	r7, [r1, #0x520] /* DRAM_DQM3 */

	ldmea	r0!, {r4-r7}
	str	r4, [r1, #0x514] /* DRAM_DQM4 */
	str	r5, [r1, #0x510] /* DRAM_DQM5 */
	str	r6, [r1, #0x5bc] /* DRAM_DQM6 */
	str	r7, [r1, #0x5c4] /* DRAM_DQM7 */

	ldmea	r0!, {r4-r7}
	str	r4, [r1, #0x56c] /* DRAM_CAS */
	str	r5, [r1, #0x578] /* DRAM_RAS */
	str	r6, [r1, #0x588] /* DRAM_SDCLK_0 */
	str	r7, [r1, #0x594] /* DRAM_SDCLK_1 */

	ldmea	r0!, {r5-r6}
	str	r5, [r1, #0x750] /* DDRMODE_CTL */
	str	r6, [r1, #0x774] /* DDRMODE */

	ldmea	r0!, {r4-r7}
	str	r4, [r1, #0x5a8] /* DRAM_SDQS0 */
	str	r5, [r1, #0x5b0] /* DRAM_SDQS1 */
	str	r6, [r1, #0x524] /* DRAM_SDQS2 */
	str	r7, [r1, #0x51c] /* DRAM_SDQS3 */

	ldmea	r0!, {r4-r7}
	str	r4, [r1, #0x518] /* DRAM_SDQS4 */
	str	r5, [r1, #0x50c] /* DRAM_SDQS5 */
	str	r6, [r1, #0x5b8] /* DRAM_SDQS6 */
	str	r7, [r1, #0x5c0] /* DRAM_SDQS7 */

	ldmea	r0!, {r4-r7}
	str	r4, [r1, #0x784] /* GPR_B0DS */
	str	r5, [r1, #0x788] /* GPR_B1DS */
	str	r6, [r1, #0x794] /* GPR_B2DS */
	str	r7, [r1, #0x79c] /* GPR_B3DS */

	ldmea	r0!, {r4-r7}
	str	r4, [r1, #0x7a0] /* GPR_B4DS */
	str	r5, [r1, #0x7a4] /* GPR_B5DS */
	str	r6, [r1, #0x7a8] /* GPR_B6DS */
	str	r7, [r1, #0x748] /* GPR_B7DS */

	ldmea	r0!, {r5-r7}
	str	r5, [r1, #0x74c] /* GPR_ADDS*/
	str	r6, [r1, #0x59c] /* DRAM_SODT0*/
	str	r7, [r1, #0x5a0] /* DRAM_SODT1*/

	.endm

	.macro	dq_ddr_io_set_lpm

	mov	r0, #0
	str	r0, [r1, #0x5ac] /* DRAM_DQM0 */
	str	r0, [r1, #0x5b4] /* DRAM_DQM1 */
	str	r0, [r1, #0x528] /* DRAM_DQM2 */
	str	r0, [r1, #0x520] /* DRAM_DQM3 */

	str	r0, [r1, #0x514] /* DRAM_DQM4 */
	str	r0, [r1, #0x510] /* DRAM_DQM5 */
	str	r0, [r1, #0x5bc] /* DRAM_DQM6 */
	str	r0, [r1, #0x5c4] /* DRAM_DQM7 */

	str	r0, [r1, #0x56c] /* DRAM_CAS */
	str	r0, [r1, #0x578] /* DRAM_RAS */
	str	r0, [r1, #0x588] /* DRAM_SDCLK_0 */
	str	r0, [r1, #0x594] /* DRAM_SDCLK_1 */

	str	r0, [r1, #0x750] /* DDRMODE_CTL */
	str	r0, [r1, #0x774] /* DDRMODE */

	str	r0, [r1, #0x5a8] /* DRAM_SDQS0 */
	str	r0, [r1, #0x5b0] /* DRAM_SDQS1 */
	str	r0, [r1, #0x524] /* DRAM_SDQS2 */
	str	r0, [r1, #0x51c] /* DRAM_SDQS3 */

	str	r0, [r1, #0x518] /* DRAM_SDQS4 */
	str	r0, [r1, #0x50c] /* DRAM_SDQS5 */
	str	r0, [r1, #0x5b8] /* DRAM_SDQS6 */
	str	r0, [r1, #0x5c0] /* DRAM_SDQS7 */

	str	r0, [r1, #0x784] /* GPR_B0DS */
	str	r0, [r1, #0x788] /* GPR_B1DS */
	str	r0, [r1, #0x794] /* GPR_B2DS */
	str	r0, [r1, #0x79c] /* GPR_B3DS */

	str	r0, [r1, #0x7a0] /* GPR_B4DS */
	str	r0, [r1, #0x7a4] /* GPR_B5DS */
	str	r0, [r1, #0x7a8] /* GPR_B6DS */
	str	r0, [r1, #0x748] /* GPR_B7DS */

	str	r0, [r1, #0x74c] /* GPR_ADDS*/
	str	r0, [r1, #0x59c] /* DRAM_SODT0*/
	str	r0, [r1, #0x5a0] /* DRAM_SODT1*/

	.endm

/******************************************************************
Invalidate l1 dcache, r0-r4, r6, r7 used
******************************************************************/
	.macro	invalidate_l1_dcache

	mov 	r0, #0
	mcr 	p15, 2, r0, c0, c0, 0
	mrc 	p15, 1, r0, c0, c0, 0

	ldr 	r1, =0x7fff
	and 	r2, r1, r0, lsr #13

	ldr 	r1, =0x3ff

	and 	r3, r1, r0, lsr #3	@ NumWays - 1
	add 	r2, r2, #1		@ NumSets

	and 	r0, r0, #0x7
	add 	r0, r0, #4		@ SetShift

	clz 	r1, r3			@ WayShift
	add 	r4, r3, #1		@ NumWays
1:
	sub 	r2, r2, #1		@ NumSets--
	mov 	r3, r4			@ Temp = NumWays
2:
	subs	r3, r3, #1		@ Temp--
	mov 	r7, r3, lsl r1
	mov 	r6, r2, lsl r0
	orr 	r7, r7, r6
	mcr 	p15, 0, r7, c7, c6, 2
	bgt 	2b
	cmp 	r2, #0
	bgt 	1b
	dsb
	isb

	.endm

/******************************************************************
Flush and disable L1 dcache
******************************************************************/
	.macro	flush_disable_l1_dcache

	/*
	 * Flush all data from the L1 data cache before disabling
	 * SCTLR.C bit.
	 */
	push	{r0-r12, lr}
	ldr r0, =v7_flush_dcache_all
	mov lr, pc
	mov pc, r0
	pop {r0-r12, lr}

	/*
	 * Clear the SCTLR.C bit to prevent further data cache
	 * allocation. Clearing SCTLR.C would make all the data accesses
	 * strongly ordered and would not hit the cache.
	 */
	mrc p15, 0, r0, c1, c0, 0
	bic r0, r0, #(1 << 2)		@ Disable the C bit
	mcr p15, 0, r0, c1, c0, 0
	isb

	/*
	 * Invalidate L1 data cache. Even though only invalidate is
	 * necessary exported flush API is used here. Doing clean
	 * on already clean cache would be almost NOP.
	 */
	push	{r0-r12, lr}
	ldr r0, =v7_flush_dcache_all
	mov lr, pc
	mov pc, r0
	pop {r0-r12, lr}

	/*
	 * Execute an ISB instruction to ensure that all of the
	 * CP15 register changes have been committed.
	 */
	isb

	/*
	 * Execute a barrier instruction to ensure that all cache,
	 * TLB and branch predictor maintenance operations issued
	 * by any CPU in the cluster have completed.
	 */
	dsb
	dmb

	.endm

/******************************************************************
Clean L2 cache
******************************************************************/
	.macro	clean_l2_cache
	/* Clean L2 cache to write the dirty data into DRAM to make
	sure the data alignment between DRAM and L2 cache.
	*/
#ifdef CONFIG_CACHE_L2X0
	/* Clean L2 cache here */
	ldr r1, =L2_BASE_ADDR
	add r1, r1, #PERIPBASE_VIRT
	/* Make way to 0xFFFF 16 ways */
	mov r0, #0x10000
	sub r0, r0, #0x1
	/* 0x7BC is L2X0_CLEAN_WAY */
	mov r4, #0x700
	orr r4, #0xBC
	str r0, [r1, r4]
3:
	ldr r5, [r1, r4]
	ands	r5, r5, r0
	bne 3b
4:
	mov r5, #0x0
	/* 0x730 is L2X0_CACHE_SYNC */
	mov r4, #0x700
	orr r4, #0x30
	str r5, [r1, r4]
5:
	ldr r5, [r1, r4]
	ands	r5, r5, #0x1
	bne 5b
#endif
	.endm

ENTRY(mx6_suspend)
	stmfd	sp!, {r0-r12}     @ Save registers
/*************************************************************
suspend mode entry
*************************************************************/
	mov	r12, r3 /* Save CPU type to r12*/

	cmp	r0, #0x1
	bne	dormant		/* dormant mode */

	/* Need to flush and disable L1 dcache*/
	flush_disable_l1_dcache

	/* Need to clean L2 dcache*/
	clean_l2_cache

	/* Disable L2 cache */
#ifdef CONFIG_CACHE_L2X0
	ldr r2, =L2_BASE_ADDR
	add r2, r2, #PERIPBASE_VIRT
	mov r4, #0x0
	str r4, [r2, #L2X0_CTRL]
#endif

	wfi

	nop
	nop
	nop
	nop

	/* Invalidate L1 I-cache first */
	mov r1, #0x0
	mcr p15, 0, r1, c7, c5, 0 @ Invalidate I-Cache

	/* Need to invalidate L1 dcache, as the power is dropped */
	invalidate_l1_dcache

	/* Enable L1 dcache first */
	mrc p15, 0, r0, c1, c0, 0
	orr r0, r0, #(1 << 2)	@ Disable the C bit
	mcr p15, 0, r0, c1, c0, 0

	/* Enable L2 cache here */
#ifdef CONFIG_CACHE_L2X0
	ldr r2, =L2_BASE_ADDR
	add r2, r2, #PERIPBASE_VIRT
	mov r4, #0x1
	str r4, [r2, #L2X0_CTRL]
#endif

/***********************************************************
never run to here
************************************************************/
	b 	out	/* exit standby */

/************************************************************
dormant entry, data save in stack, save sp in the src_gpr2
************************************************************/
dormant:
	mov 	r3, r1
	mov 	r0, r1
	add 	r0, r0, #IRAM_SUSPEND_SIZE /* 4K */
	ldr 	r4, =SRC_BASE_ADDR
	add 	r4, r4, #PERIPBASE_VIRT
	str 	r0, [r4, #SRC_GPR2_OFFSET] /* set src_gpr2 */
/************************************************************
saved register and context as below:
	ddr_iomux set
	sp
	spsr
	lr
	CPACR
	TTBR0
	TTBR1
	TTBCR
	DACR
	PRRR
	NMRR
	ACTLR
	Context ID
	User r/w thread ID
	Secure or NS VBAR
	CPSR
	SCTLR
************************************************************/
	/* save mmdc iomux setting, stack is from the tail of
	iram_suspend base */

	mov	r0, r2 		/* get suspend_iram_base */
	add	r0, r0, #IRAM_SUSPEND_SIZE	/* 4K */

	mov	r4, r12			@ Store cpu type
	stmfd	r0!, {r4}

	ldr	r1, =MX6Q_IOMUXC_BASE_ADDR
	add	r1, r1, #PERIPBASE_VIRT

	cmp r12, #MXC_CPU_MX6Q
	bne dl_io_save
	dq_ddr_io_save
	b ddr_io_save_done
dl_io_save:
	cmp r12, #MXC_CPU_MX6DL
	bne sl_io_save
	dl_ddr_io_save
	b ddr_io_save_done
sl_io_save:
	sl_ddr_io_save

ddr_io_save_done:

#ifdef CONFIG_CACHE_L2X0
	ldr r1, =L2_BASE_ADDR
	add r1, r1, #PERIPBASE_VIRT

	ldr r4, [r1, #L2X0_CTRL]
	ldr r5, [r1, #L2X0_AUX_CTRL]
	ldr r6, [r1, #L2X0_TAG_LATENCY_CTRL]
	ldr r7, [r1, #L2X0_DATA_LATENCY_CTRL]
	stmfd	r0!, {r4-r7}

	ldr r4, [r1, #L2X0_PREFETCH_CTRL]
	ldr r5, [r1, #L2X0_POWER_CTRL]
	stmfd	r0!, {r4-r5}
#endif

	mov	r4, sp			@ Store sp
	mrs	r5, spsr		@ Store spsr
	mov	r6, lr			@ Store lr
	stmfd	r0!, {r4-r6}

	/* c1 and c2 registers */
	mrc	p15, 0, r4, c1, c0, 2	@ CPACR
	mrc	p15, 0, r5, c2, c0, 0	@ TTBR0
	mrc	p15, 0, r6, c2, c0, 1	@ TTBR1
	mrc	p15, 0, r7, c2, c0, 2	@ TTBCR
	stmfd	r0!, {r4-r7}

	/* c3 and c10 registers */
	mrc	p15, 0, r4, c3, c0, 0	@ DACR
	mrc	p15, 0, r5, c10, c2, 0	@ PRRR
	mrc	p15, 0, r6, c10, c2, 1	@ NMRR
	mrc	p15, 0, r7, c1, c0, 1	@ ACTLR
	stmfd	r0!,{r4-r7}

	/* c12, c13 and CPSR registers */
	mrc	p15, 0, r4, c13, c0, 1	@ Context ID
	mrc	p15, 0, r5, c13, c0, 2	@ User r/w thread ID
	mrc	p15, 0, r6, c12, c0, 0	@ Secure or NS VBAR
	mrs	r7, cpsr		@ Store CPSR
	stmfd	r0!, {r4-r7}

	/* c1 control register */
	mrc	p15, 0, r4, c1, c0, 0	@ SCTLR
	stmfd	r0!, {r4}

	/* Need to flush and disable L1 dcache*/
	flush_disable_l1_dcache

	/* Need to clean L2 dcache*/
	clean_l2_cache

/****************************************************************
set ddr iomux to low power mode
****************************************************************/
	/* Make sure TLBs are primed. */
	ldr	r1,  =MX6Q_IOMUXC_BASE_ADDR
	add	r1, r1, #PERIPBASE_VIRT
	ldr	r0, [r1]
	ldr	r1, =SRC_BASE_ADDR
	add	r1, r1, #PERIPBASE_VIRT
	ldr	r0, [r1]
#ifdef CONFIG_MX6_INTER_LDO_BYPASS
	ldr	r1, =ANATOP_BASE_ADDR
	add	r1, r1, #PERIPBASE_VIRT
	ldr	r0, [r1]
#endif

	/* Do a DSB to drain the buffers. */
	dsb

	ldr	r1, =MMDC_P0_BASE_ADDR
	add	r1, r1, #PERIPBASE_VIRT
	ldr	r0, [r1, #MMDC_MAPSR_OFFSET]
	bic	r0, #MMDC_MAPSR_PSD 		/* enable lpm */
	str	r0, [r1, #MMDC_MAPSR_OFFSET]
refresh:
	ldr	r0, [r1, #MMDC_MAPSR_OFFSET] 	/* MMDC_MAPSR */
	and	r0, r0, #MMDC_MAPSR_PSS 	/* PSS bit */
	cmp	r0, #0
	beq	refresh

	/* set mmdc iomux to low power mode */
	ldr	r1, =MX6Q_IOMUXC_BASE_ADDR
	add	r1, r1, #PERIPBASE_VIRT

	cmp r12, #MXC_CPU_MX6Q
	bne dl_io_set_lpm
	dq_ddr_io_set_lpm
	b ddr_io_set_lpm_done
dl_io_set_lpm:
	cmp r12, #MXC_CPU_MX6DL
	bne sl_io_set_lpm
	dl_ddr_io_set_lpm
	b ddr_io_set_lpm_done
sl_io_set_lpm:
	sl_ddr_io_set_lpm

ddr_io_set_lpm_done:

/****************************************************************
save resume pointer into SRC_GPR1
****************************************************************/
	ldr	r0, =mx6_suspend
	ldr	r1, =resume
	sub	r1, r1, r0
	add	r3, r3, r1
	ldr	r1, =SRC_BASE_ADDR
	add	r1, r1, #PERIPBASE_VIRT
	str	r3, [r1, #SRC_GPR1_OFFSET]
#ifdef CONFIG_MX6_INTER_LDO_BYPASS
	ldr	r1, =ANATOP_BASE_ADDR
	add	r1, r1, #PERIPBASE_VIRT
	ldr	r3, [r1, #0x140]
	bic	r3, r3, #0x1f
	orr	r3, r3, #0x1e
	str	r3, [r1, #0x140]
#endif
/****************************************************************
execute a wfi instruction to let SOC go into stop mode.
****************************************************************/
	wfi

	nop
	nop
	nop
	nop

/****************************************************************
if go here, means there is a wakeup irq pending, we should resume
system immediately.
****************************************************************/
#ifdef CONFIG_MX6_INTER_LDO_BYPASS
	ldr	r1, =ANATOP_BASE_ADDR
	add	r1, r1, #PERIPBASE_VIRT
	ldr	r3, [r1, #0x140]
	orr	r3, r3, #0x1f
	str	r3, [r1, #0x140]
#endif

	mov	r0, r2 		/* get suspend_iram_base */
	add	r0, r0, #IRAM_SUSPEND_SIZE	/* 4K */

	ldmea	r0!, {r12}	@ get cpu type to make ddr io
				@ offset right

	ldr	r1, =MX6Q_IOMUXC_BASE_ADDR
	add	r1, r1, #PERIPBASE_VIRT

	cmp r12, #MXC_CPU_MX6Q
	bne dl_io_restore
	dq_ddr_io_restore
	b ddr_io_restore_done
dl_io_restore:
	cmp r12, #MXC_CPU_MX6DL
	bne sl_io_restore
	dl_ddr_io_restore
	b	ddr_io_restore_done
sl_io_restore:
	sl_ddr_io_restore

ddr_io_restore_done:
	/* Add enough nops so that the
	  * prefetcher will not get instructions
	  * from DDR before its IO pads
	  * are restored.
	  */
	nop
	nop
	nop
	nop
	nop

	nop
	nop
	nop
	nop
	nop

	nop
	nop
	nop
	nop
	nop

	nop
	nop
	nop
	nop
	nop

	nop
	nop
	nop
	nop
	nop

	mrc	p15, 0, r1, c1, c0, 0
	orr	r1, r1, #(1 << 2)	@ Enable the C bit
	mcr	p15, 0, r1, c1, c0, 0

	b 	out	/* exit standby */

/****************************************************************
when SOC exit stop mode, arm core restart from here, currently
are running with MMU off.
****************************************************************/
resume:
#ifdef CONFIG_MX6_INTER_LDO_BYPASS
	ldr	r1, =ANATOP_BASE_ADDR
	ldr	r3, [r1, #0x140]
	orr	r3, r3, #0x1f
	str	r3, [r1, #0x140]
#endif
	/* Invalidate L1 I-cache first */
	mov	r1,	#0x0
	mcr	p15, 0, r1, c7, c5, 0	@ Invalidate I-Cache
	mcr	p15, 0, r1, c7, c5, 0	@ invalidate Icache to PoU
	mcr	p15, 0, r1, c7, c5, 6	@ invalidate branch predictor
	mov	r1, #0x1800
	mcr	p15, 0, r1, c1, c0, 0	@ enable the Icache and branch prediction
	isb							@ as soon as possible

	/* Need to invalidate L1 dcache */
	invalidate_l1_dcache

	ldr	r0, =SRC_BASE_ADDR
	str	r1, [r0, #SRC_GPR1_OFFSET] /* clear SRC_GPR1 */
	ldr	r0, [r0, #SRC_GPR2_OFFSET]

	ldmea	r0!, {r12}	@ get cpu type

	/* Restore DDR IO */
	ldr	r1, =MX6Q_IOMUXC_BASE_ADDR

	cmp	r12, #MXC_CPU_MX6Q
	bne	dl_io_dsm_restore
	dq_ddr_io_restore
	b ddr_io_restore_dsm_done
dl_io_dsm_restore:
	cmp	r12, #MXC_CPU_MX6DL
	bne	sl_io_dsm_restore
	dl_ddr_io_restore
	b	ddr_io_restore_dsm_done
sl_io_dsm_restore:
	sl_ddr_io_restore

ddr_io_restore_dsm_done:

#ifdef CONFIG_CACHE_L2X0
	ldr r2, =L2_BASE_ADDR
	ldmea	r0!, {r4-r7}
	/* L2 will be enabled after L1 is enabled */
	mov r4, #0x0
	str r4, [r2, #L2X0_CTRL]
	str r5, [r2, #L2X0_AUX_CTRL]
	str r6, [r2, #L2X0_TAG_LATENCY_CTRL]
	str r7, [r2, #L2X0_DATA_LATENCY_CTRL]

	ldmea	r0!, {r4-r5}
	str r4, [r2, #L2X0_PREFETCH_CTRL]
	str r5, [r2, #L2X0_POWER_CTRL]
#endif

	/* Restore cp15 registers and cpu type */
	ldmea	r0!, {r4-r6}
	mov sp, r4			@ Restore sp
	msr spsr_cxsf, r5		@ Restore spsr
	mov lr, r6			@ Restore lr

	/* c1 and c2 registers */
	ldmea	r0!, {r4-r7}
	mcr	p15, 0, r4, c1, c0, 2	@ CPACR
	mcr	p15, 0, r5, c2, c0, 0	@ TTBR0
	mcr	p15, 0, r6, c2, c0, 1	@ TTBR1
	mcr	p15, 0, r7, c2, c0, 2	@ TTBCR

	/* c3 and c10 registers */
	ldmea	r0!,{r4-r7}
	mcr	p15, 0, r4, c3, c0, 0	@ DACR
	mcr	p15, 0, r5, c10, c2, 0	@ PRRR
	mcr	p15, 0, r6, c10, c2, 1	@ NMRR
	mcr	p15, 0, r7, c1, c0, 1	@ ACTLR

	/* c12, c13 and CPSR registers */
	ldmea	r0!,{r4-r7}
	mcr	p15, 0, r4, c13, c0, 1	@ Context ID
	mcr	p15, 0, r5, c13, c0, 2	@ User r/w thread ID
	mrc	p15, 0, r6, c12, c0, 0	@ Secure or NS VBAR
	msr	cpsr, r7		@ store cpsr

	/*
	 * Enabling MMU here. Page entry needs to be altered
	 * to create temporary 1:1 map and then resore the entry
	 * ones MMU is enabled
	 */
	mrc	p15, 0, r7, c2, c0, 2	@ Read TTBRControl
	and	r7, #0x7		@ Extract N (0:2) to decide
	cmp	r7, #0x0		@ TTBR0/TTBR1
	beq	use_ttbr0
ttbr_error:
	b	ttbr_error		@ Only N = 0 supported
use_ttbr0:
	mrc	p15, 0, r2, c2, c0, 0	@ Read TTBR0
	ldr	r5, =TTRBIT_MASK
	and	r2, r5
	mov	r4, pc
	ldr	r5, =TABLE_INDEX_MASK
	and	r4, r5			@ r4 = 31 to 20 bits of pc
	ldr	r1, =TABLE_ENTRY
	add	r1, r1, r4		@ r1 has value of table entry
	lsr	r4, #18			@ Address of table entry
	add	r2, r4			@ r2 - location to be modified

	/* Storing previous entry of location being modified */
	ldr	r4, [r2]
	mov	r9, r4
	str	r1, [r2]

	/*
	 * Storing address of entry being modified
	 * It will be restored after enabling MMU
	 */
	mov 	r10, r2

	mov	r1, #0
	mcr	p15, 0, r1, c7, c5, 4	@ Flush prefetch buffer
	mcr	p15, 0, r1, c8, c5, 0	@ Invalidate ITLB
	mcr	p15, 0, r1, c8, c6, 0	@ Invalidate DTLB

	/*
	 * Restore control register  but don't enable Data caches here.
	 * Caches will be enabled after restoring MMU table entry.
	 */
	ldmea	r0!, {r4}
	mov r11, r4
	ldr	r2, =CACHE_DISABLE_MASK
	and	r4, r4, r2
	mcr	p15, 0, r4, c1, c0, 0
	isb
	dsb
	ldr	r1, =mmu_on_label
	bx	r1
mmu_on_label:

/************************************************************
restore control register to enable cache
************************************************************/
	mov r0, r11
	mcr p15, 0, r0, c1, c0, 0	@ with caches enabled.
	dsb
	isb

#ifdef CONFIG_CACHE_L2X0
	/* Enable L2 cache here */
	ldr r2, =L2_BASE_ADDR
	add r2, r2, #PERIPBASE_VIRT
	mov r4, #0x1
	str r4, [r2, #L2X0_CTRL]
#endif

	mov	r8, lr
	push	{r0}

	/* Set up the per-CPU stacks */
	bl	cpu_init
	pop	{r0}

	/*
	 * Restore the MMU table entry that was modified for
	 * enabling MMU.
	 */
	ldr	r4, =PAGE_OFFSET

	cmp r12, #MXC_CPU_MX6SL
	bne dq_dl_phy_offset
	ldr	r5, =MX6SL_PHYS_OFFSET
	b	get_phy_offset_done
dq_dl_phy_offset:
	ldr	r5, =MX6_PHYS_OFFSET
get_phy_offset_done:

	sub	r4, r4, r5
	add	r4, r4, r10
	str	r9, [r4]

	mov	r0, #0
	mcr	p15, 0, r0, c7, c1, 6	@ flush TLB and issue barriers
	mcr	p15, 0, r0, c7, c5, 4	@ Flush prefetch buffer
	mcr	p15, 0, r0, c7, c5, 6	@ Invalidate BTB
	mcr	p15, 0, r0, c8, c5, 0	@ Invalidate ITLB
	mcr	p15, 0, r0, c8, c6, 0	@ Invalidate DTLB
	dsb
	isb

/***********************************************************
return back to mx6_suspend_enter for dormant
***********************************************************/
	mov	lr, r8
	ldmfd	sp!, {r0-r12}
	mov	pc, lr
/************************************************
return back to mx6_suspend_enter for suspend
*************************************************/
out:
	ldmfd	sp!, {r0-r12}
	mov	pc, lr

	.type	mx6_do_suspend, #object
ENTRY(mx6_do_suspend)
	.word	mx6_suspend
	.size	mx6_suspend, . - mx6_suspend