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88727fc3ec
At the moment we only support FEAT_DIT to be either unconditionally compiled in, or to be not supported at all. Add support for runtime detection (ENABLE_DIT=2), by splitting is_armv8_4_dit_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). We use ENABLE_DIT in two occassions in assembly code, where we just set the DIT bit in the DIT system register. Protect those two cases by reading the CPU ID register when ENABLE_DIT is set to 2. Change the FVP platform default to the now supported dynamic option (=2), so the right decision can be made by the code at runtime. Change-Id: I506d352f18e23c60db8cdf08edb449f60adbe098 Signed-off-by: Andre Przywara <andre.przywara@arm.com>
119 lines
2.3 KiB
C
119 lines
2.3 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 unsigned int read_feat_amu_id_field(void)
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{
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return ISOLATE_FIELD(read_id_pfr0(), ID_PFR0_AMU);
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}
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static inline bool is_feat_amu_supported(void)
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{
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if (ENABLE_FEAT_AMU == FEAT_STATE_DISABLED) {
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return false;
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}
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if (ENABLE_FEAT_AMU == FEAT_STATE_ALWAYS) {
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return true;
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}
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return read_feat_amu_id_field() >= ID_PFR0_AMU_V1;
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}
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static inline bool is_feat_amuv1p1_supported(void)
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{
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if (ENABLE_FEAT_AMUv1p1 == FEAT_STATE_DISABLED) {
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return false;
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}
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if (ENABLE_FEAT_AMUv1p1 == FEAT_STATE_ALWAYS) {
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return true;
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}
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return read_feat_amu_id_field() >= ID_PFR0_AMU_V1P1;
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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 unsigned int read_feat_coptrc_id_field(void)
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{
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return ISOLATE_FIELD(read_id_dfr0(), ID_DFR0_COPTRC);
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}
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static inline bool is_feat_sys_reg_trace_supported(void)
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{
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if (ENABLE_SYS_REG_TRACE_FOR_NS == FEAT_STATE_DISABLED) {
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return false;
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}
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if (ENABLE_SYS_REG_TRACE_FOR_NS == FEAT_STATE_ALWAYS) {
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return true;
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}
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return read_feat_coptrc_id_field() != 0U;
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}
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static inline unsigned int read_feat_dit_id_field(void)
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{
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return ISOLATE_FIELD(read_id_pfr0(), ID_PFR0_DIT);
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}
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static inline bool is_feat_dit_supported(void)
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{
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if (ENABLE_FEAT_DIT == FEAT_STATE_DISABLED) {
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return false;
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}
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if (ENABLE_FEAT_DIT == FEAT_STATE_ALWAYS) {
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return true;
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}
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return read_feat_dit_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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