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aaaf2cc313
In this patch, we are trying to introduce the wrapper macro CREATE_FEATURE_PRESENT to get the following capability and align it for all the features: -> is_feat_xx_present(): Does Hardware implement the feature. -> uniformity in naming the function across multiple features. -> improved readability The is_feat_xx_present() is implemented to check if the hardware implements the feature and does not take into account the ENABLE_FEAT_XXX flag enabled/disabled in software. - CREATE_FEATURE_PRESENT(name, idreg, shift, mask, idval) The wrapper macro reduces the function to a single line and creates the is_feat_xx_present function that checks the id register based on the shift and mask values and compares this against a determined idvalue. Change-Id: I7b91d2c9c6fbe55f94c693aa1b2c50be54fb9ecc Signed-off-by: Sona Mathew <sonarebecca.mathew@arm.com>
162 lines
5.9 KiB
C
162 lines
5.9 KiB
C
/*
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* Copyright (c) 2019-2024, 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, mask) \
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((unsigned int)(((reg) >> (feat)) & mask))
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#define CREATE_FEATURE_SUPPORTED(name, read_func, guard) \
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static inline bool is_ ## name ## _supported(void) \
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{ \
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if ((guard) == FEAT_STATE_DISABLED) { \
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return false; \
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} \
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if ((guard) == FEAT_STATE_ALWAYS) { \
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return true; \
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} \
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return read_func(); \
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}
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#define CREATE_FEATURE_PRESENT(name, idreg, idfield, mask, idval) \
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static inline bool is_ ## name ## _present(void) \
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{ \
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return (ISOLATE_FIELD(read_ ## idreg(), idfield, mask) >= idval) \
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? true : false; \
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}
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#define CREATE_FEATURE_FUNCS(name, idreg, idfield, mask, idval, guard) \
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CREATE_FEATURE_PRESENT(name, idreg, idfield, mask, idval) \
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CREATE_FEATURE_SUPPORTED(name, is_ ## name ## _present, guard)
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/*
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* +----------------------------+
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* | Features supported |
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* +----------------------------+
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* | GENTIMER |
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* +----------------------------+
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* | FEAT_TTCNP |
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* +----------------------------+
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* | FEAT_AMU |
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* +----------------------------+
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* | FEAT_AMUV1P1 |
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* +----------------------------+
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* | FEAT_TRF |
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* +----------------------------+
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* | FEAT_SYS_REG_TRACE |
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* +----------------------------+
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* | FEAT_DIT |
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* +----------------------------+
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* | FEAT_PAN |
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* +----------------------------+
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* | FEAT_SSBS |
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* +----------------------------+
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* | FEAT_PMUV3 |
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* +----------------------------+
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* | FEAT_MTPMU |
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* +----------------------------+
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*/
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/* GENTIMER */
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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_SHIFT,
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ID_PFR1_GENTIMER_MASK) != 0U;
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}
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/* FEAT_TTCNP: Translation table common not private */
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CREATE_FEATURE_PRESENT(feat_ttcnp, id_mmfr4, ID_MMFR4_CNP_SHIFT,
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ID_MMFR4_CNP_MASK, 1U)
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/* FEAT_AMU: Activity Monitors Extension */
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CREATE_FEATURE_FUNCS(feat_amu, id_pfr0, ID_PFR0_AMU_SHIFT,
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ID_PFR0_AMU_MASK, ID_PFR0_AMU_V1, ENABLE_FEAT_AMU)
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/* FEAT_AMUV1P1: AMU Extension v1.1 */
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CREATE_FEATURE_FUNCS(feat_amuv1p1, id_pfr0, ID_PFR0_AMU_SHIFT,
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ID_PFR0_AMU_MASK, ID_PFR0_AMU_V1P1, ENABLE_FEAT_AMUv1p1)
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/* FEAT_TRF: Tracefilter */
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CREATE_FEATURE_FUNCS(feat_trf, id_dfr0, ID_DFR0_TRACEFILT_SHIFT,
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ID_DFR0_TRACEFILT_MASK, 1U, ENABLE_TRF_FOR_NS)
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/* FEAT_SYS_REG_TRACE */
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CREATE_FEATURE_FUNCS(feat_sys_reg_trace, id_dfr0, ID_DFR0_COPTRC_SHIFT,
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ID_DFR0_COPTRC_MASK, 1U, ENABLE_SYS_REG_TRACE_FOR_NS)
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/* FEAT_DIT: Data independent timing */
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CREATE_FEATURE_FUNCS(feat_dit, id_pfr0, ID_PFR0_DIT_SHIFT,
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ID_PFR0_DIT_MASK, 1U, ENABLE_FEAT_DIT)
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/* FEAT_PAN: Privileged access never */
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CREATE_FEATURE_FUNCS(feat_pan, id_mmfr3, ID_MMFR3_PAN_SHIFT,
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ID_MMFR3_PAN_MASK, 1U, ENABLE_FEAT_PAN)
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/* FEAT_SSBS: Speculative store bypass safe */
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CREATE_FEATURE_PRESENT(feat_ssbs, id_pfr2, ID_PFR2_SSBS_SHIFT,
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ID_PFR2_SSBS_MASK, 1U)
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/* FEAT_PMUV3 */
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CREATE_FEATURE_PRESENT(feat_pmuv3, id_dfr0, ID_DFR0_PERFMON_SHIFT,
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ID_DFR0_PERFMON_MASK, 3U)
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/* FEAT_MTPMU */
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static inline bool is_feat_mtpmu_present(void)
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{
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unsigned int mtpmu = ISOLATE_FIELD(read_id_dfr1(), ID_DFR1_MTPMU_SHIFT,
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ID_DFR1_MTPMU_MASK);
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return (mtpmu != 0U) && (mtpmu != MTPMU_NOT_IMPLEMENTED);
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}
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CREATE_FEATURE_SUPPORTED(feat_mtpmu, is_feat_mtpmu_present, DISABLE_MTPMU)
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/*
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* TWED, ECV, CSV2, RAS are only used by the AArch64 EL2 context switch
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* code. In fact, EL2 context switching is only needed for AArch64 (since
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* there is no secure AArch32 EL2), so just disable these features here.
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*/
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static inline bool is_feat_twed_supported(void) { return false; }
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static inline bool is_feat_ecv_supported(void) { return false; }
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static inline bool is_feat_ecv_v2_supported(void) { return false; }
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static inline bool is_feat_csv2_2_supported(void) { return false; }
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static inline bool is_feat_csv2_3_supported(void) { return false; }
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static inline bool is_feat_ras_supported(void) { return false; }
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/* The following features are supported in AArch64 only. */
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static inline bool is_feat_vhe_supported(void) { return false; }
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static inline bool is_feat_sel2_supported(void) { return false; }
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static inline bool is_feat_fgt_supported(void) { return false; }
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static inline bool is_feat_tcr2_supported(void) { return false; }
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static inline bool is_feat_spe_supported(void) { return false; }
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static inline bool is_feat_rng_supported(void) { return false; }
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static inline bool is_feat_gcs_supported(void) { return false; }
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static inline bool is_feat_mte2_supported(void) { return false; }
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static inline bool is_feat_mpam_supported(void) { return false; }
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static inline bool is_feat_hcx_supported(void) { return false; }
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static inline bool is_feat_sve_supported(void) { return false; }
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static inline bool is_feat_brbe_supported(void) { return false; }
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static inline bool is_feat_trbe_supported(void) { return false; }
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static inline bool is_feat_nv2_supported(void) { return false; }
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static inline bool is_feat_sme_supported(void) { return false; }
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static inline bool is_feat_sme2_supported(void) { return false; }
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static inline bool is_feat_s2poe_supported(void) { return false; }
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static inline bool is_feat_s1poe_supported(void) { return false; }
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static inline bool is_feat_sxpoe_supported(void) { return false; }
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static inline bool is_feat_s2pie_supported(void) { return false; }
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static inline bool is_feat_s1pie_supported(void) { return false; }
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static inline bool is_feat_sxpie_supported(void) { return false; }
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static inline bool is_feat_uao_present(void) { return false; }
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static inline bool is_feat_nmi_present(void) { return false; }
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static inline bool is_feat_ebep_present(void) { return false; }
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static inline bool is_feat_sebep_present(void) { return false; }
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#endif /* ARCH_FEATURES_H */
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