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04c1db1e57
This patch introduces the following three platform interfaces: * void plat_psci_stat_accounting_start(const psci_power_state_t *state_info) This is an optional hook that platforms can implement in order to perform accounting before entering a low power state. This typically involves capturing a timestamp. * void plat_psci_stat_accounting_stop(const psci_power_state_t *state_info) This is an optional hook that platforms can implement in order to perform accounting after exiting from a low power state. This typically involves capturing a timestamp. * u_register_t plat_psci_stat_get_residency(unsigned int lvl, const psci_power_state_t *state_info, unsigned int last_cpu_index) This is an optional hook that platforms can implement in order to calculate the PSCI stat residency. If any of these interfaces are overridden by the platform, it is recommended that all of them are. By default `ENABLE_PSCI_STAT` is disabled. If `ENABLE_PSCI_STAT` is set but `ENABLE_PMF` is not set then an alternative PSCI stat collection backend must be provided. If both are set, then default weak definitions of these functions are provided, using PMF to calculate the residency. NOTE: Previously, platforms did not have to explicitly set `ENABLE_PMF` since this was automatically done by the top-level Makefile. Change-Id: I17b47804dea68c77bc284df15ee1ccd66bc4b79b Signed-off-by: dp-arm <dimitris.papastamos@arm.com>
246 lines
9.6 KiB
C
246 lines
9.6 KiB
C
/*
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* Copyright (c) 2013-2017, 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 <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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/*******************************************************************************
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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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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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