| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * 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. |
| */ |
| |
| #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 |
| |
| lwz r6, TI_LOCAL_FLAGS(r2) |
| ori r6, r6, _TLF_SLEEPING |
| stw r6, TI_LOCAL_FLAGS(r2) |
| |
| 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 |
