1 /* 2 * Copyright (c) 2021-2023, Arm Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #ifndef SME_H 8 #define SME_H 9 10 #include <stdbool.h> 11 #include <context.h> 12 13 /* 14 * Maximum value of LEN field in SMCR_ELx. This is different than the maximum 15 * supported value which is platform dependent. In the first version of SME the 16 * LEN field is limited to 4 bits but will be expanded in future iterations. 17 * To support different versions, the code that discovers the supported vector 18 * lengths will write the max value into SMCR_ELx then read it back to see how 19 * many bits are implemented. 20 */ 21 #define SME_SMCR_LEN_MAX U(0x1FF) 22 23 #if ENABLE_SME_FOR_NS 24 void sme_enable(cpu_context_t *context); 25 void sme_init_el3(void); 26 void sme_init_el2_unused(void); 27 void sme_disable(cpu_context_t *context); 28 #else 29 static inline void sme_enable(cpu_context_t *context) 30 { 31 } 32 static inline void sme_init_el3(void) 33 { 34 } 35 static inline void sme_init_el2_unused(void) 36 { 37 } 38 static inline void sme_disable(cpu_context_t *context) 39 { 40 } 41 #endif /* ENABLE_SME_FOR_NS */ 42 43 #endif /* SME_H */ 44