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ebf1ca10e4
During system suspend, the GICv3 Distributor and Redistributor context can be lost due to power gating of the system power domain. This means that the GICv3 context needs to be saved prior to system suspend and restored on wakeup. Currently the consensus is that the Firmware should be in charge of this. See tf-issues#464 for more details. This patch introduces helper APIs in the GICv3 driver to save and restore the Distributor and Redistributor contexts. The GICv3 ITS context is not considered in this patch because the specification says that the details of ITS power management is implementation-defined. These APIs are expected to be appropriately invoked by the platform layer during system suspend. Fixes ARM-software/tf-issues#464 Change-Id: Iebb9c6770ab8c4d522546f161fa402d2fe02ec00 Signed-off-by: Soby Mathew <soby.mathew@arm.com> Signed-off-by: Douglas Raillard <douglas.raillard@arm.com>
21 lines
655 B
C
21 lines
655 B
C
/*
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* Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef __ARM_GICV3_COMMON_H__
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#define __ARM_GICV3_COMMON_H__
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/*******************************************************************************
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* GIC500/GIC600 Re-distributor interface registers & constants
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******************************************************************************/
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/* GICR_WAKER implementation-defined bit definitions */
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#define WAKER_SL_SHIFT 0
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#define WAKER_QSC_SHIFT 31
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#define WAKER_SL_BIT (1U << WAKER_SL_SHIFT)
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#define WAKER_QSC_BIT (1U << WAKER_QSC_SHIFT)
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#endif /* __ARM_GICV3_COMMON_H__ */
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