| /* |
| * Copyright (c) 2021-2022, Arm Limited. All rights reserved. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| #ifndef SVE_H |
| #define SVE_H |
| |
| #define fill_sve_helper(num) "ldr z"#num", [%0, #"#num", MUL VL];" |
| #define read_sve_helper(num) "str z"#num", [%0, #"#num", MUL VL];" |
| |
| /* |
| * Max. vector length permitted by the architecture: |
| * SVE: 2048 bits = 256 bytes |
| */ |
| #define SVE_VECTOR_LEN_BYTES 256 |
| #define SVE_NUM_VECTORS 32 |
| |
| #ifndef __ASSEMBLY__ |
| |
| typedef uint8_t sve_vector_t[SVE_VECTOR_LEN_BYTES]; |
| |
| #ifdef __aarch64__ |
| |
| /* Returns the SVE implemented VL in bytes (constrained by ZCR_EL3.LEN) */ |
| static inline uint64_t sve_vector_length_get(void) |
| { |
| uint64_t vl; |
| |
| __asm__ volatile( |
| ".arch_extension sve\n" |
| "rdvl %0, #1;" |
| ".arch_extension nosve\n" |
| : "=r" (vl) |
| ); |
| |
| return vl; |
| } |
| |
| #endif /* __aarch64__ */ |
| #endif /* __ASSEMBLY__ */ |
| #endif /* SVE_H */ |