9778b696a0
Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
53 lines
1.1 KiB
ArmAsm
53 lines
1.1 KiB
ArmAsm
/*
|
|
* 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
|
|
|
|
CURRENT_THREAD_INFO(r5, r1)
|
|
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
|