1 /*
2  * Copyright (c) 2021, 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 
12 #include <context.h>
13 
14 /*
15  * Maximum value of LEN field in SMCR_ELx. This is different than the maximum
16  * supported value which is platform dependent. In the first version of SME the
17  * LEN field is limited to 4 bits but will be expanded in future iterations.
18  * To support different versions, the code that discovers the supported vector
19  * lengths will write the max value into SMCR_ELx then read it back to see how
20  * many bits are implemented.
21  */
22 #define SME_SMCR_LEN_MAX	U(0x1FF)
23 
24 void sme_enable(cpu_context_t *context);
25 void sme_disable(cpu_context_t *context);
26 
27 #endif /* SME_H */
28