1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Enter and leave sleep state on chips with 6
4 * power management bits, which don't leave sl
5 *
6 * Author: Scott Wood <scottwood@freescale.com>
7 *
8 * Copyright (c) 2006-2007 Freescale Semicondu
9 */
10
11 #include <asm/ppc_asm.h>
12 #include <asm/reg.h>
13 #include <asm/thread_info.h>
14 #include <asm/asm-offsets.h>
15
16 _GLOBAL(mpc6xx_enter_standby)
17 mflr r4
18
19 mfspr r5, SPRN_HID0
20 rlwinm r5, r5, 0, ~(HID0_DOZE | HID0_
21 oris r5, r5, HID0_SLEEP@h
22 mtspr SPRN_HID0, r5
23 isync
24
25 lis r5, ret_from_standby@h
26 ori r5, r5, ret_from_standby@l
27 mtlr r5
28
29 lwz r6, TI_LOCAL_FLAGS(r2)
30 ori r6, r6, _TLF_SLEEPING
31 stw r6, TI_LOCAL_FLAGS(r2)
32
33 mfmsr r5
34 ori r5, r5, MSR_EE
35 oris r5, r5, MSR_POW@h
36 sync
37 mtmsr r5
38 isync
39
40 1: b 1b
41
42 ret_from_standby:
43 mfspr r5, SPRN_HID0
44 rlwinm r5, r5, 0, ~HID0_SLEEP
45 mtspr SPRN_HID0, r5
46
47 mtlr r4
48 blr
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