Commit 0b2cca80 authored by Scott Wood's avatar Scott Wood Committed by Paul Mackerras
Browse files

[POWERPC] Add 6xx-style HID0_SLEEP support. 



This adds a function to put a 6xx/7xx/7xxx/83xx family CPU into sleep
mode, and return after an interrupt has occurred.  It expects to be
called with interrupts disabled, and returns with interrupts disabled.
Interrupts are enabled while the processor is asleep, but the interrupt
that wakes the processor is not handled; it is still pending when this
function returns.

Signed-off-by: default avatarScott Wood <scottwood@freescale.com>
Signed-off-by: default avatarGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent a560643e

arch/powerpc/sysdev/6xx-suspend.S

0 → 100644
+52 −0
Original line number Diff line number Diff line 
/*

 * Enter and leave sleep state on chips with 6xx-style HID0

 * power management bits, which don't leave sleep state via reset.

 *

 * Author: Scott Wood <scottwood@freescale.com>

 *

 * Copyright (c) 2006-2007 Freescale Semiconductor, Inc.

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 as published

 * by the Free Software Foundation.

 */



#include <asm/ppc_asm.h>

#include <asm/reg.h>

#include <asm/thread_info.h>

#include <asm/asm-offsets.h>



_GLOBAL(mpc6xx_enter_standby)

	mflr	r4



	mfspr	r5, SPRN_HID0

	rlwinm	r5, r5, 0, ~(HID0_DOZE | HID0_NAP)

	oris	r5, r5, HID0_SLEEP@h

	mtspr	SPRN_HID0, r5

	isync



	lis	r5, ret_from_standby@h

	ori	r5, r5, ret_from_standby@l

	mtlr	r5



	rlwinm	r5, r1, 0, 0, 31-THREAD_SHIFT

	lwz	r6, TI_LOCAL_FLAGS(r5)

	ori	r6, r6, _TLF_SLEEPING

	stw	r6, TI_LOCAL_FLAGS(r5)



	mfmsr	r5

	ori	r5, r5, MSR_EE

	oris	r5, r5, MSR_POW@h

	sync

	mtmsr	r5

	isync



1:	b	1b



ret_from_standby:

	mfspr	r5, SPRN_HID0

	rlwinm	r5, r5, 0, ~HID0_SLEEP

	mtspr	SPRN_HID0, r5



	mtlr	r4

	blr

arch/powerpc/sysdev/Makefile

+4 −0
Original line number Diff line number Diff line
@@ -44,3 +44,7 @@ obj-$(CONFIG_PPC_DCR) += dcr.o 
obj-$(CONFIG_8xx)		+= mpc8xx_pic.o cpm1.o

obj-$(CONFIG_UCODE_PATCH)	+= micropatch.o

endif



ifeq ($(CONFIG_SUSPEND),y)

obj-$(CONFIG_6xx)		+= 6xx-suspend.o

endif

include/asm-powerpc/mpc6xx.h

0 → 100644
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#ifndef __ASM_POWERPC_MPC6xx_H

#define __ASM_POWERPC_MPC6xx_H



void mpc6xx_enter_standby(void);



#endif

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