/* * Copyright (c) 2013-2015, ARM Limited and Contributors. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * Neither the name of ARM nor the names of its contributors may be used * to endorse or promote products derived from this software without specific * prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #ifndef __PSCI_PRIVATE_H__ #define __PSCI_PRIVATE_H__ #include #include #include #include #include #include /* * The following helper macros abstract the interface to the Bakery * Lock API. */ #if USE_COHERENT_MEM #define psci_lock_init(non_cpu_pd_node, idx) \ bakery_lock_init(&(non_cpu_pd_node)[(idx)].lock) #define psci_lock_get(non_cpu_pd_node) \ bakery_lock_get(&((non_cpu_pd_node)->lock)) #define psci_lock_release(non_cpu_pd_node) \ bakery_lock_release(&((non_cpu_pd_node)->lock)) #else #define psci_lock_init(non_cpu_pd_node, idx) \ ((non_cpu_pd_node)[(idx)].lock_index = (idx)) #define psci_lock_get(non_cpu_pd_node) \ bakery_lock_get((non_cpu_pd_node)->lock_index, \ CPU_DATA_PSCI_LOCK_OFFSET) #define psci_lock_release(non_cpu_pd_node) \ bakery_lock_release((non_cpu_pd_node)->lock_index, \ CPU_DATA_PSCI_LOCK_OFFSET) #endif /* * The PSCI capability which are provided by the generic code but does not * depend on the platform or spd capabilities. */ #define PSCI_GENERIC_CAP \ (define_psci_cap(PSCI_VERSION) | \ define_psci_cap(PSCI_AFFINITY_INFO_AARCH64) | \ define_psci_cap(PSCI_FEATURES)) /* * The PSCI capabilities mask for 64 bit functions. */ #define PSCI_CAP_64BIT_MASK \ (define_psci_cap(PSCI_CPU_SUSPEND_AARCH64) | \ define_psci_cap(PSCI_CPU_ON_AARCH64) | \ define_psci_cap(PSCI_AFFINITY_INFO_AARCH64) | \ define_psci_cap(PSCI_MIG_AARCH64) | \ define_psci_cap(PSCI_MIG_INFO_UP_CPU_AARCH64) | \ define_psci_cap(PSCI_SYSTEM_SUSPEND_AARCH64)) /* * Helper macros to get/set the fields of PSCI per-cpu data. */ #define psci_set_aff_info_state(aff_state) \ set_cpu_data(psci_svc_cpu_data.aff_info_state, aff_state) #define psci_get_aff_info_state() \ get_cpu_data(psci_svc_cpu_data.aff_info_state) #define psci_get_aff_info_state_by_idx(idx) \ get_cpu_data_by_index(idx, psci_svc_cpu_data.aff_info_state) #define psci_get_suspend_pwrlvl() \ get_cpu_data(psci_svc_cpu_data.target_pwrlvl) #define psci_set_suspend_pwrlvl(target_lvl) \ set_cpu_data(psci_svc_cpu_data.target_pwrlvl, target_lvl) #define psci_set_cpu_local_state(state) \ set_cpu_data(psci_svc_cpu_data.local_state, state) #define psci_get_cpu_local_state() \ get_cpu_data(psci_svc_cpu_data.local_state) #define psci_get_cpu_local_state_by_idx(idx) \ get_cpu_data_by_index(idx, psci_svc_cpu_data.local_state) /* * Helper macros for the CPU level spinlocks */ #define psci_spin_lock_cpu(idx) spin_lock(&psci_cpu_pd_nodes[idx].cpu_lock) #define psci_spin_unlock_cpu(idx) spin_unlock(&psci_cpu_pd_nodes[idx].cpu_lock) /* Helper macro to identify a CPU standby request in PSCI Suspend call */ #define is_cpu_standby_req(is_power_down_state, retn_lvl) \ (((!(is_power_down_state)) && ((retn_lvl) == 0)) ? 1 : 0) /******************************************************************************* * The following two data structures implement the power domain tree. The tree * is used to track the state of all the nodes i.e. power domain instances * described by the platform. The tree consists of nodes that describe CPU power * domains i.e. leaf nodes and all other power domains which are parents of a * CPU power domain i.e. non-leaf nodes. ******************************************************************************/ typedef struct non_cpu_pwr_domain_node { /* * Index of the first CPU power domain node level 0 which has this node * as its parent. */ unsigned int cpu_start_idx; /* * Number of CPU power domains which are siblings of the domain indexed * by 'cpu_start_idx' i.e. all the domains in the range 'cpu_start_idx * -> cpu_start_idx + ncpus' have this node as their parent. */ unsigned int ncpus; /* * Index of the parent power domain node. * TODO: Figure out whether to whether using pointer is more efficient. */ unsigned int parent_node; plat_local_state_t local_state; unsigned char level; #if USE_COHERENT_MEM bakery_lock_t lock; #else /* For indexing the bakery_info array in per CPU data */ unsigned char lock_index; #endif } non_cpu_pd_node_t; typedef struct cpu_pwr_domain_node { unsigned long mpidr; /* * Index of the parent power domain node. * TODO: Figure out whether to whether using pointer is more efficient. */ unsigned int parent_node; /* * A CPU power domain does not require state coordination like its * parent power domains. Hence this node does not include a bakery * lock. A spinlock is required by the CPU_ON handler to prevent a race * when multiple CPUs try to turn ON the same target CPU. */ spinlock_t cpu_lock; } cpu_pd_node_t; /******************************************************************************* * Data prototypes ******************************************************************************/ extern const plat_psci_ops_t *psci_plat_pm_ops; extern non_cpu_pd_node_t psci_non_cpu_pd_nodes[PSCI_NUM_NON_CPU_PWR_DOMAINS]; extern cpu_pd_node_t psci_cpu_pd_nodes[PLATFORM_CORE_COUNT]; extern uint32_t psci_caps; /******************************************************************************* * SPD's power management hooks registered with PSCI ******************************************************************************/ extern const spd_pm_ops_t *psci_spd_pm; /******************************************************************************* * Function prototypes ******************************************************************************/ /* Private exported functions from psci_common.c */ int psci_validate_power_state(unsigned int power_state, psci_power_state_t *state_info); void psci_query_sys_suspend_pwrstate(psci_power_state_t *state_info); int psci_validate_mpidr(unsigned long mpidr); void psci_init_req_local_pwr_states(void); void psci_power_up_finish(void); int psci_validate_entry_point(entry_point_info_t *ep, uint64_t entrypoint, uint64_t context_id); void psci_get_parent_pwr_domain_nodes(unsigned int cpu_idx, int end_lvl, unsigned int node_index[]); void psci_do_state_coordination(int end_pwrlvl, psci_power_state_t *state_info); void psci_acquire_pwr_domain_locks(int end_pwrlvl, unsigned int cpu_idx); void psci_release_pwr_domain_locks(int end_pwrlvl, unsigned int cpu_idx); int psci_validate_suspend_req(const psci_power_state_t *state_info, unsigned int is_power_down_state_req); unsigned int psci_find_max_off_lvl(const psci_power_state_t *state_info); unsigned int psci_find_target_suspend_lvl(const psci_power_state_t *state_info); void psci_set_pwr_domains_to_run(uint32_t end_pwrlvl); void psci_print_power_domain_map(void); unsigned int psci_is_last_on_cpu(void); int psci_spd_migrate_info(uint64_t *mpidr); /* Private exported functions from psci_on.c */ int psci_cpu_on_start(unsigned long target_cpu, entry_point_info_t *ep, int end_pwrlvl); void psci_cpu_on_finish(unsigned int cpu_idx, psci_power_state_t *state_info); /* Private exported functions from psci_cpu_off.c */ int psci_do_cpu_off(int end_pwrlvl); /* Private exported functions from psci_pwrlvl_suspend.c */ void psci_cpu_suspend_start(entry_point_info_t *ep, int end_pwrlvl, psci_power_state_t *state_info, unsigned int is_power_down_state_req); void psci_cpu_suspend_finish(unsigned int cpu_idx, psci_power_state_t *state_info); /* Private exported functions from psci_helpers.S */ void psci_do_pwrdown_cache_maintenance(uint32_t pwr_level); void psci_do_pwrup_cache_maintenance(void); /* Private exported functions from psci_system_off.c */ void __dead2 psci_system_off(void); void __dead2 psci_system_reset(void); #endif /* __PSCI_PRIVATE_H__ */