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6437a09a2d
At the moment we only support FEAT_SPE to be either unconditionally compiled in, or to be not supported at all. Add support for runtime detection (ENABLE_SPE_FOR_NS=2), by splitting is_armv8_2_feat_spe_present() into an ID register reading function and a second function to report the support status. That function considers both build time settings and runtime information (if needed), and is used before we access SPE related registers. Previously SPE was enabled unconditionally for all platforms, change this now to the runtime detection version. Change-Id: I830c094107ce6a398bf1f4aef7ffcb79d4f36552 Signed-off-by: Andre Przywara <andre.przywara@arm.com>
52 lines
1 KiB
C
52 lines
1 KiB
C
/*
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* Copyright (c) 2019-2023, 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 ARCH_FEATURES_H
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#define ARCH_FEATURES_H
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#include <stdbool.h>
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#include <arch_helpers.h>
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#include <common/feat_detect.h>
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#define ISOLATE_FIELD(reg, feat) \
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((unsigned int)(((reg) >> (feat ## _SHIFT)) & (feat ## _MASK)))
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static inline bool is_armv7_gentimer_present(void)
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{
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return ISOLATE_FIELD(read_id_pfr1(), ID_PFR1_GENTIMER) != 0U;
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}
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static inline bool is_armv8_2_ttcnp_present(void)
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{
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return ISOLATE_FIELD(read_id_mmfr4(), ID_MMFR4_CNP) != 0U;
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}
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static inline unsigned int read_feat_trf_id_field(void)
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{
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return ISOLATE_FIELD(read_id_dfr0(), ID_DFR0_TRACEFILT);
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}
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static inline bool is_feat_trf_supported(void)
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{
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if (ENABLE_TRF_FOR_NS == FEAT_STATE_DISABLED) {
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return false;
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}
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if (ENABLE_TRF_FOR_NS == FEAT_STATE_ALWAYS) {
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return true;
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}
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return read_feat_trf_id_field() != 0U;
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}
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static inline bool is_feat_spe_supported(void)
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{
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/* FEAT_SPE is AArch64 only */
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return false;
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}
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#endif /* ARCH_FEATURES_H */
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