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256 lines
9.9 KiB
256 lines
9.9 KiB
/*
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* Copyright (c) 2013-2016, ARM Limited and Contributors. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of ARM nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __PSCI_PRIVATE_H__
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#define __PSCI_PRIVATE_H__
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#include <arch.h>
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#include <bakery_lock.h>
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#include <bl_common.h>
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#include <cpu_data.h>
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#include <pmf.h>
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#include <psci.h>
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#include <spinlock.h>
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/*
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* The following helper macros abstract the interface to the Bakery
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* Lock API.
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*/
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#define psci_lock_init(non_cpu_pd_node, idx) \
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((non_cpu_pd_node)[(idx)].lock_index = (idx))
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#define psci_lock_get(non_cpu_pd_node) \
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bakery_lock_get(&psci_locks[(non_cpu_pd_node)->lock_index])
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#define psci_lock_release(non_cpu_pd_node) \
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bakery_lock_release(&psci_locks[(non_cpu_pd_node)->lock_index])
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/*
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* The PSCI capability which are provided by the generic code but does not
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* depend on the platform or spd capabilities.
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*/
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#define PSCI_GENERIC_CAP \
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(define_psci_cap(PSCI_VERSION) | \
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define_psci_cap(PSCI_AFFINITY_INFO_AARCH64) | \
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define_psci_cap(PSCI_FEATURES))
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/*
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* The PSCI capabilities mask for 64 bit functions.
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*/
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#define PSCI_CAP_64BIT_MASK \
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(define_psci_cap(PSCI_CPU_SUSPEND_AARCH64) | \
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define_psci_cap(PSCI_CPU_ON_AARCH64) | \
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define_psci_cap(PSCI_AFFINITY_INFO_AARCH64) | \
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define_psci_cap(PSCI_MIG_AARCH64) | \
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define_psci_cap(PSCI_MIG_INFO_UP_CPU_AARCH64) | \
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define_psci_cap(PSCI_NODE_HW_STATE_AARCH64) | \
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define_psci_cap(PSCI_SYSTEM_SUSPEND_AARCH64) | \
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define_psci_cap(PSCI_STAT_RESIDENCY_AARCH64) | \
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define_psci_cap(PSCI_STAT_COUNT_AARCH64))
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/*
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* Helper macros to get/set the fields of PSCI per-cpu data.
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*/
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#define psci_set_aff_info_state(aff_state) \
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set_cpu_data(psci_svc_cpu_data.aff_info_state, aff_state)
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#define psci_get_aff_info_state() \
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get_cpu_data(psci_svc_cpu_data.aff_info_state)
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#define psci_get_aff_info_state_by_idx(idx) \
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get_cpu_data_by_index(idx, psci_svc_cpu_data.aff_info_state)
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#define psci_set_aff_info_state_by_idx(idx, aff_state) \
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set_cpu_data_by_index(idx, psci_svc_cpu_data.aff_info_state,\
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aff_state)
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#define psci_get_suspend_pwrlvl() \
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get_cpu_data(psci_svc_cpu_data.target_pwrlvl)
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#define psci_set_suspend_pwrlvl(target_lvl) \
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set_cpu_data(psci_svc_cpu_data.target_pwrlvl, target_lvl)
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#define psci_set_cpu_local_state(state) \
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set_cpu_data(psci_svc_cpu_data.local_state, state)
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#define psci_get_cpu_local_state() \
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get_cpu_data(psci_svc_cpu_data.local_state)
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#define psci_get_cpu_local_state_by_idx(idx) \
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get_cpu_data_by_index(idx, psci_svc_cpu_data.local_state)
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/*
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* Helper macros for the CPU level spinlocks
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*/
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#define psci_spin_lock_cpu(idx) spin_lock(&psci_cpu_pd_nodes[idx].cpu_lock)
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#define psci_spin_unlock_cpu(idx) spin_unlock(&psci_cpu_pd_nodes[idx].cpu_lock)
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/* Helper macro to identify a CPU standby request in PSCI Suspend call */
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#define is_cpu_standby_req(is_power_down_state, retn_lvl) \
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(((!(is_power_down_state)) && ((retn_lvl) == 0)) ? 1 : 0)
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/* Following are used as ID's to capture time-stamp */
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#define PSCI_STAT_ID_ENTER_LOW_PWR 0
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#define PSCI_STAT_ID_EXIT_LOW_PWR 1
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#define PSCI_STAT_TOTAL_IDS 2
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/* Declare PMF service functions for PSCI */
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PMF_DECLARE_CAPTURE_TIMESTAMP(psci_svc)
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PMF_DECLARE_GET_TIMESTAMP(psci_svc)
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/*******************************************************************************
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* The following two data structures implement the power domain tree. The tree
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* is used to track the state of all the nodes i.e. power domain instances
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* described by the platform. The tree consists of nodes that describe CPU power
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* domains i.e. leaf nodes and all other power domains which are parents of a
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* CPU power domain i.e. non-leaf nodes.
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******************************************************************************/
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typedef struct non_cpu_pwr_domain_node {
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/*
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* Index of the first CPU power domain node level 0 which has this node
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* as its parent.
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*/
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unsigned int cpu_start_idx;
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/*
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* Number of CPU power domains which are siblings of the domain indexed
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* by 'cpu_start_idx' i.e. all the domains in the range 'cpu_start_idx
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* -> cpu_start_idx + ncpus' have this node as their parent.
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*/
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unsigned int ncpus;
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/*
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* Index of the parent power domain node.
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* TODO: Figure out whether to whether using pointer is more efficient.
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*/
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unsigned int parent_node;
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plat_local_state_t local_state;
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unsigned char level;
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/* For indexing the psci_lock array*/
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unsigned char lock_index;
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} non_cpu_pd_node_t;
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typedef struct cpu_pwr_domain_node {
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u_register_t mpidr;
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/*
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* Index of the parent power domain node.
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* TODO: Figure out whether to whether using pointer is more efficient.
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*/
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unsigned int parent_node;
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/*
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* A CPU power domain does not require state coordination like its
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* parent power domains. Hence this node does not include a bakery
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* lock. A spinlock is required by the CPU_ON handler to prevent a race
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* when multiple CPUs try to turn ON the same target CPU.
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*/
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spinlock_t cpu_lock;
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} cpu_pd_node_t;
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/*******************************************************************************
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* Data prototypes
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******************************************************************************/
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extern const plat_psci_ops_t *psci_plat_pm_ops;
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extern non_cpu_pd_node_t psci_non_cpu_pd_nodes[PSCI_NUM_NON_CPU_PWR_DOMAINS];
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extern cpu_pd_node_t psci_cpu_pd_nodes[PLATFORM_CORE_COUNT];
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extern unsigned int psci_caps;
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/* One bakery lock is required for each non-cpu power domain */
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DECLARE_BAKERY_LOCK(psci_locks[PSCI_NUM_NON_CPU_PWR_DOMAINS]);
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/*******************************************************************************
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* SPD's power management hooks registered with PSCI
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******************************************************************************/
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extern const spd_pm_ops_t *psci_spd_pm;
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/*******************************************************************************
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* Function prototypes
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******************************************************************************/
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/* Private exported functions from psci_common.c */
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int psci_validate_power_state(unsigned int power_state,
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psci_power_state_t *state_info);
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void psci_query_sys_suspend_pwrstate(psci_power_state_t *state_info);
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int psci_validate_mpidr(u_register_t mpidr);
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void psci_init_req_local_pwr_states(void);
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void psci_get_target_local_pwr_states(unsigned int end_pwrlvl,
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psci_power_state_t *target_state);
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int psci_validate_entry_point(entry_point_info_t *ep,
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uintptr_t entrypoint, u_register_t context_id);
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void psci_get_parent_pwr_domain_nodes(unsigned int cpu_idx,
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unsigned int end_lvl,
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unsigned int node_index[]);
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void psci_do_state_coordination(unsigned int end_pwrlvl,
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psci_power_state_t *state_info);
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void psci_acquire_pwr_domain_locks(unsigned int end_pwrlvl,
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unsigned int cpu_idx);
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void psci_release_pwr_domain_locks(unsigned int end_pwrlvl,
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unsigned int cpu_idx);
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int psci_validate_suspend_req(const psci_power_state_t *state_info,
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unsigned int is_power_down_state_req);
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unsigned int psci_find_max_off_lvl(const psci_power_state_t *state_info);
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unsigned int psci_find_target_suspend_lvl(const psci_power_state_t *state_info);
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void psci_set_pwr_domains_to_run(unsigned int end_pwrlvl);
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void psci_print_power_domain_map(void);
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unsigned int psci_is_last_on_cpu(void);
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int psci_spd_migrate_info(u_register_t *mpidr);
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/* Private exported functions from psci_on.c */
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int psci_cpu_on_start(u_register_t target_cpu,
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entry_point_info_t *ep);
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void psci_cpu_on_finish(unsigned int cpu_idx,
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psci_power_state_t *state_info);
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/* Private exported functions from psci_off.c */
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int psci_do_cpu_off(unsigned int end_pwrlvl);
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/* Private exported functions from psci_suspend.c */
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void psci_cpu_suspend_start(entry_point_info_t *ep,
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unsigned int end_pwrlvl,
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psci_power_state_t *state_info,
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unsigned int is_power_down_state_req);
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void psci_cpu_suspend_finish(unsigned int cpu_idx,
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psci_power_state_t *state_info);
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/* Private exported functions from psci_helpers.S */
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void psci_do_pwrdown_cache_maintenance(unsigned int pwr_level);
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void psci_do_pwrup_cache_maintenance(void);
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/* Private exported functions from psci_system_off.c */
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void __dead2 psci_system_off(void);
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void __dead2 psci_system_reset(void);
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/* Private exported functions from psci_stat.c */
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void psci_stats_update_pwr_down(unsigned int end_pwrlvl,
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const psci_power_state_t *state_info);
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void psci_stats_update_pwr_up(unsigned int end_pwrlvl,
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const psci_power_state_t *state_info,
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unsigned int flags);
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u_register_t psci_stat_residency(u_register_t target_cpu,
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unsigned int power_state);
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u_register_t psci_stat_count(u_register_t target_cpu,
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unsigned int power_state);
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#endif /* __PSCI_PRIVATE_H__ */
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