Merge tag 'locks-v3.16-2' of git://git.samba.org/jlayton/linux
[linux/fpc-iii.git] / arch / powerpc / sysdev / 6xx-suspend.S
blobcf48e9cb257596698a65f88877e85a3bb33c1f8c
1 /*
2  * Enter and leave sleep state on chips with 6xx-style HID0
3  * power management bits, which don't leave sleep state via reset.
4  *
5  * Author: Scott Wood <scottwood@freescale.com>
6  *
7  * Copyright (c) 2006-2007 Freescale Semiconductor, Inc.
8  *
9  * This program is free software; you can redistribute it and/or modify it
10  * under the terms of the GNU General Public License version 2 as published
11  * by the Free Software Foundation.
12  */
14 #include <asm/ppc_asm.h>
15 #include <asm/reg.h>
16 #include <asm/thread_info.h>
17 #include <asm/asm-offsets.h>
19 _GLOBAL(mpc6xx_enter_standby)
20         mflr    r4
22         mfspr   r5, SPRN_HID0
23         rlwinm  r5, r5, 0, ~(HID0_DOZE | HID0_NAP)
24         oris    r5, r5, HID0_SLEEP@h
25         mtspr   SPRN_HID0, r5
26         isync
28         lis     r5, ret_from_standby@h
29         ori     r5, r5, ret_from_standby@l
30         mtlr    r5
32         CURRENT_THREAD_INFO(r5, r1)
33         lwz     r6, TI_LOCAL_FLAGS(r5)
34         ori     r6, r6, _TLF_SLEEPING
35         stw     r6, TI_LOCAL_FLAGS(r5)
37         mfmsr   r5
38         ori     r5, r5, MSR_EE
39         oris    r5, r5, MSR_POW@h
40         sync
41         mtmsr   r5
42         isync
44 1:      b       1b
46 ret_from_standby:
47         mfspr   r5, SPRN_HID0
48         rlwinm  r5, r5, 0, ~HID0_SLEEP
49         mtspr   SPRN_HID0, r5
51         mtlr    r4
52         blr