| Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 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 | */ |
| 13 | |
| 14 | #include <asm/ppc_asm.h> |
| 15 | #include <asm/reg.h> |
| 16 | #include <asm/thread_info.h> |
| 17 | #include <asm/asm-offsets.h> |
| 18 | |
| 19 | _GLOBAL(mpc6xx_enter_standby) |
| 20 | mflr r4 |
| 21 | |
| 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 |
| 27 | |
| 28 | lis r5, ret_from_standby@h |
| 29 | ori r5, r5, ret_from_standby@l |
| 30 | mtlr r5 |
| 31 | |
| 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) |
| 36 | |
| 37 | mfmsr r5 |
| 38 | ori r5, r5, MSR_EE |
| 39 | oris r5, r5, MSR_POW@h |
| 40 | sync |
| 41 | mtmsr r5 |
| 42 | isync |
| 43 | |
| 44 | 1: b 1b |
| 45 | |
| 46 | ret_from_standby: |
| 47 | mfspr r5, SPRN_HID0 |
| 48 | rlwinm r5, r5, 0, ~HID0_SLEEP |
| 49 | mtspr SPRN_HID0, r5 |
| 50 | |
| 51 | mtlr r4 |
| 52 | blr |