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6cac724d52
This patch enables the v8.6 extension to add a delay before WFE traps are taken. A weak hook plat_arm_set_twedel_scr_el3 has been added in plat/common/aarch64/plat_common.c that disables this feature by default but platform-specific code can override it when needed. The only hook provided sets the TWED fields in SCR_EL3, there are similar fields in HCR_EL2, SCTLR_EL2, and SCTLR_EL1 to control WFE trap delays in lower ELs but these should be configured by code running at EL2 and/or EL1 depending on the platform configuration and is outside the scope of TF-A. Signed-off-by: John Powell <john.powell@arm.com> Change-Id: I0a9bb814205efeab693a3d0a0623e62144abba2d
16 lines
264 B
C
16 lines
264 B
C
/*
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* Copyright (c) 2020, Arm Limited. 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 TWED_H
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#define TWED_H
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#include <stdint.h>
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#define TWED_DISABLED U(0xFFFFFFFF)
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uint32_t plat_arm_set_twedel_scr_el3(void);
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#endif /* TWEDE_H */
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