1/*- 2 * Copyright (c) 2013, 2014 Robin Randhawa 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29#ifndef _MACHINE_PSCI_H_ 30#define _MACHINE_PSCI_H_ 31 32#include <sys/types.h> 33 34typedef int (*psci_initfn_t)(device_t dev, int default_version); 35typedef int (*psci_callfn_t)(register_t, register_t, register_t, register_t); 36 37extern int psci_present; 38 39int psci_cpu_on(unsigned long, unsigned long, unsigned long); 40void psci_reset(void); 41int32_t psci_features(uint32_t); 42int psci_get_version(void); 43 44/* Handler to let us call into the PSCI/SMCCC firmware */ 45extern psci_callfn_t psci_callfn; 46static inline int 47psci_call(register_t a, register_t b, register_t c, register_t d) 48{ 49 50 return (psci_callfn(a, b, c, d)); 51} 52/* One of these handlers will be selected during the boot */ 53int psci_hvc_despatch(register_t, register_t, register_t, register_t); 54int psci_smc_despatch(register_t, register_t, register_t, register_t); 55 56 57/* 58 * PSCI return codes. 59 */ 60#define PSCI_RETVAL_SUCCESS 0 61#define PSCI_RETVAL_NOT_SUPPORTED -1 62#define PSCI_RETVAL_INVALID_PARAMS -2 63#define PSCI_RETVAL_DENIED -3 64#define PSCI_RETVAL_ALREADY_ON -4 65#define PSCI_RETVAL_ON_PENDING -5 66#define PSCI_RETVAL_INTERNAL_FAILURE -6 67#define PSCI_RETVAL_NOT_PRESENT -7 68#define PSCI_RETVAL_DISABLED -8 69/* 70 * Used to signal PSCI is not available, e.g. to start a CPU. 71 */ 72#define PSCI_MISSING 1 73 74/* 75 * PSCI function codes (as per PSCI v0.2). 76 */ 77#ifdef __aarch64__ 78#define PSCI_FNID_VERSION 0x84000000 79#define PSCI_FNID_CPU_SUSPEND 0xc4000001 80#define PSCI_FNID_CPU_OFF 0x84000002 81#define PSCI_FNID_CPU_ON 0xc4000003 82#define PSCI_FNID_AFFINITY_INFO 0xc4000004 83#define PSCI_FNID_MIGRATE 0xc4000005 84#define PSCI_FNID_MIGRATE_INFO_TYPE 0x84000006 85#define PSCI_FNID_MIGRATE_INFO_UP_CPU 0xc4000007 86#define PSCI_FNID_SYSTEM_OFF 0x84000008 87#define PSCI_FNID_SYSTEM_RESET 0x84000009 88#define PSCI_FNID_FEATURES 0x8400000a 89#else 90#define PSCI_FNID_VERSION 0x84000000 91#define PSCI_FNID_CPU_SUSPEND 0x84000001 92#define PSCI_FNID_CPU_OFF 0x84000002 93#define PSCI_FNID_CPU_ON 0x84000003 94#define PSCI_FNID_AFFINITY_INFO 0x84000004 95#define PSCI_FNID_MIGRATE 0x84000005 96#define PSCI_FNID_MIGRATE_INFO_TYPE 0x84000006 97#define PSCI_FNID_MIGRATE_INFO_UP_CPU 0x84000007 98#define PSCI_FNID_SYSTEM_OFF 0x84000008 99#define PSCI_FNID_SYSTEM_RESET 0x84000009 100#define PSCI_FNID_FEATURES 0x8400000a 101#endif 102 103#define PSCI_VER_MAJOR(v) (((v) >> 16) & 0xFF) 104#define PSCI_VER_MINOR(v) ((v) & 0xFF) 105 106enum psci_fn { 107 PSCI_FN_VERSION, 108 PSCI_FN_CPU_SUSPEND, 109 PSCI_FN_CPU_OFF, 110 PSCI_FN_CPU_ON, 111 PSCI_FN_AFFINITY_INFO, 112 PSCI_FN_MIGRATE, 113 PSCI_FN_MIGRATE_INFO_TYPE, 114 PSCI_FN_MIGRATE_INFO_UP_CPU, 115 PSCI_FN_SYSTEM_OFF, 116 PSCI_FN_SYSTEM_RESET, 117 PSCI_FN_MAX 118}; 119 120#endif /* _MACHINE_PSCI_H_ */ 121