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abd2aba99e
The CSS power management layer previously allowed to suspend system power domain level via both PSCI CPU_SUSPEND and PSCI SYSTEM_SUSPEND APIs. System suspend via PSCI CPU_SUSPEND was always problematic to support because of issues with targeting wakeup interrupts to suspended cores before the per-cpu GIC initialization is done. This is not the case for PSCI SYSTEM_SUSPEND API because all the other cores are expected to be offlined prior to issuing system suspend and PSCI CPU_ON explicit calls will be made to power them on. Hence the Juno platform used to downgrade the PSCI CPU_SUSPEND request for system power domain level to cluster level by overriding the default `plat_psci_pm_ops` exported by CSS layer. Given the direction the new CSS platforms are evolving, it is best to limit the system suspend only via PSCI SYSTEM_SUSPEND API for all CSS platforms. This patch makes changes to allow system suspend only via PSCI SYSTEM_SUSPEND API. The override of `plat_psci_ops` for Juno is removed. Change-Id: Idb30eaad04890dd46074e9e888caeedc50a4b533 Signed-off-by: Soby Mathew <soby.mathew@arm.com>
60 lines
2.7 KiB
C
60 lines
2.7 KiB
C
/*
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* Copyright (c) 2015-2017, 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 __CSS_PM_H__
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#define __CSS_PM_H__
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#include <cdefs.h>
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#include <psci.h>
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#include <types.h>
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/* System power domain at level 2, as currently implemented by CSS platforms */
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#define CSS_SYSTEM_PWR_DMN_LVL ARM_PWR_LVL2
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/* Macros to read the CSS power domain state */
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#define CSS_CORE_PWR_STATE(state) (state)->pwr_domain_state[ARM_PWR_LVL0]
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#define CSS_CLUSTER_PWR_STATE(state) (state)->pwr_domain_state[ARM_PWR_LVL1]
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#define CSS_SYSTEM_PWR_STATE(state) \
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((PLAT_MAX_PWR_LVL == CSS_SYSTEM_PWR_DMN_LVL) ?\
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(state)->pwr_domain_state[CSS_SYSTEM_PWR_DMN_LVL] : 0)
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int css_pwr_domain_on(u_register_t mpidr);
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void css_pwr_domain_on_finish(const psci_power_state_t *target_state);
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void css_pwr_domain_off(const psci_power_state_t *target_state);
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void css_pwr_domain_suspend(const psci_power_state_t *target_state);
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void css_pwr_domain_suspend_finish(
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const psci_power_state_t *target_state);
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void __dead2 css_system_off(void);
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void __dead2 css_system_reset(void);
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void css_cpu_standby(plat_local_state_t cpu_state);
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void css_get_sys_suspend_power_state(psci_power_state_t *req_state);
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int css_node_hw_state(u_register_t mpidr, unsigned int power_level);
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#endif /* __CSS_PM_H__ */
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