| 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
|---|
| 2 | /* |
|---|
| 3 | * Enter and leave sleep state on chips with 6xx-style HID0 |
|---|
| 4 | * power management bits, which don't leave sleep state via reset. |
|---|
| 5 | * |
|---|
| 6 | * Author: Scott Wood <scottwood@freescale.com> |
|---|
| 7 | * |
|---|
| 8 | * Copyright (c) 2006-2007 Freescale Semiconductor, Inc. |
|---|
| 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_NAP) |
|---|
| 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 |
|---|
| 49 | |
|---|
