| 1 | /* |
| 2 | * QEMU support -- ARM Power Control specific functions. |
| 3 | * |
| 4 | * Copyright (c) 2016 Jean-Christophe Dubois |
| 5 | * |
| 6 | * This work is licensed under the terms of the GNU GPL, version 2 or later. |
| 7 | * See the COPYING file in the top-level directory. |
| 8 | * |
| 9 | */ |
| 10 | |
| 11 | #ifndef QEMU_ARM_POWERCTL_H |
| 12 | #define QEMU_ARM_POWERCTL_H |
| 13 | |
| 14 | #include "kvm-consts.h" |
| 15 | |
| 16 | #define QEMU_ARM_POWERCTL_RET_SUCCESS QEMU_PSCI_RET_SUCCESS |
| 17 | #define QEMU_ARM_POWERCTL_INVALID_PARAM QEMU_PSCI_RET_INVALID_PARAMS |
| 18 | #define QEMU_ARM_POWERCTL_ALREADY_ON QEMU_PSCI_RET_ALREADY_ON |
| 19 | #define QEMU_ARM_POWERCTL_IS_OFF QEMU_PSCI_RET_DENIED |
| 20 | #define QEMU_ARM_POWERCTL_ON_PENDING QEMU_PSCI_RET_ON_PENDING |
| 21 | |
| 22 | /* |
| 23 | * arm_get_cpu_by_id: |
| 24 | * @cpuid: the id of the CPU we want to retrieve the state |
| 25 | * |
| 26 | * Retrieve a CPUState object from its CPU ID provided in @cpuid. |
| 27 | * |
| 28 | * Returns: a pointer to the CPUState structure of the requested CPU. |
| 29 | */ |
| 30 | CPUState *arm_get_cpu_by_id(uint64_t cpuid); |
| 31 | |
| 32 | /* |
| 33 | * arm_set_cpu_on: |
| 34 | * @cpuid: the id of the CPU we want to start/wake up. |
| 35 | * @entry: the address the CPU shall start from. |
| 36 | * @context_id: the value to put in r0/x0. |
| 37 | * @target_el: The desired exception level. |
| 38 | * @target_aa64: 1 if the requested mode is AArch64. 0 otherwise. |
| 39 | * |
| 40 | * Start the cpu designated by @cpuid in @target_el exception level. The mode |
| 41 | * shall be AArch64 if @target_aa64 is set to 1. Otherwise the mode is |
| 42 | * AArch32. The CPU shall start at @entry with @context_id in r0/x0. |
| 43 | * |
| 44 | * Returns: QEMU_ARM_POWERCTL_RET_SUCCESS on success. |
| 45 | * QEMU_ARM_POWERCTL_INVALID_PARAM if bad parameters are provided. |
| 46 | * QEMU_ARM_POWERCTL_ALREADY_ON if the CPU was already started. |
| 47 | * QEMU_ARM_POWERCTL_ON_PENDING if the CPU is still powering up |
| 48 | */ |
| 49 | int arm_set_cpu_on(uint64_t cpuid, uint64_t entry, uint64_t context_id, |
| 50 | uint32_t target_el, bool target_aa64); |
| 51 | |
| 52 | /* |
| 53 | * arm_set_cpu_off: |
| 54 | * @cpuid: the id of the CPU we want to stop/shut down. |
| 55 | * |
| 56 | * Stop the cpu designated by @cpuid. |
| 57 | * |
| 58 | * Returns: QEMU_ARM_POWERCTL_RET_SUCCESS on success. |
| 59 | * QEMU_ARM_POWERCTL_INVALID_PARAM if bad parameters are provided. |
| 60 | * QEMU_ARM_POWERCTL_IS_OFF if CPU is already off |
| 61 | */ |
| 62 | |
| 63 | int arm_set_cpu_off(uint64_t cpuid); |
| 64 | |
| 65 | /* |
| 66 | * arm_reset_cpu: |
| 67 | * @cpuid: the id of the CPU we want to reset. |
| 68 | * |
| 69 | * Reset the cpu designated by @cpuid. |
| 70 | * |
| 71 | * Returns: QEMU_ARM_POWERCTL_RET_SUCCESS on success. |
| 72 | * QEMU_ARM_POWERCTL_INVALID_PARAM if bad parameters are provided. |
| 73 | * QEMU_ARM_POWERCTL_IS_OFF if CPU is off |
| 74 | */ |
| 75 | int arm_reset_cpu(uint64_t cpuid); |
| 76 | |
| 77 | /* |
| 78 | * arm_set_cpu_on_and_reset: |
| 79 | * @cpuid: the id of the CPU we want to star |
| 80 | * |
| 81 | * Start the cpu designated by @cpuid and put it through its normal |
| 82 | * CPU reset process. The CPU will start in the way it is architected |
| 83 | * to start after a power-on reset. |
| 84 | * |
| 85 | * Returns: QEMU_ARM_POWERCTL_RET_SUCCESS on success. |
| 86 | * QEMU_ARM_POWERCTL_INVALID_PARAM if there is no CPU with that ID. |
| 87 | * QEMU_ARM_POWERCTL_ALREADY_ON if the CPU is already on. |
| 88 | * QEMU_ARM_POWERCTL_ON_PENDING if the CPU is already partway through |
| 89 | * powering on. |
| 90 | */ |
| 91 | int arm_set_cpu_on_and_reset(uint64_t cpuid); |
| 92 | |
| 93 | #endif |