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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/* Copyright (C) 2017-2018 ARM Limited */
/*
* For use by other UAPI headers only.
* Do not make direct use of header or its definitions.
*/
#ifndef _UAPI__ASM_SVE_CONTEXT_H
#define _UAPI__ASM_SVE_CONTEXT_H
#include <linux/types.h>
#define __SVE_VQ_BYTES 16 /* number of bytes per quadword */
/*
* Yes, __SVE_VQ_MAX is 512 QUADWORDS.
*
* To help ensure forward portability, this is much larger than the
* current maximum value defined by the SVE architecture. While arrays
* or static allocations can be sized based on this value, watch out!
* It will waste a surprisingly large amount of memory.
*
* Dynamic sizing based on the actual runtime vector length is likely to
* be preferable for most purposes.
*/
#define __SVE_VQ_MIN 1
#define __SVE_VQ_MAX 512
#define __SVE_VL_MIN (__SVE_VQ_MIN * __SVE_VQ_BYTES)
#define __SVE_VL_MAX (__SVE_VQ_MAX * __SVE_VQ_BYTES)
#define __SVE_NUM_ZREGS 32
#define __SVE_NUM_PREGS 16
#define __sve_vl_valid(vl) \
((vl) % __SVE_VQ_BYTES == 0 && \
(vl) >= __SVE_VL_MIN && \
(vl) <= __SVE_VL_MAX)
#define __sve_vq_from_vl(vl) ((vl) / __SVE_VQ_BYTES)
#define __sve_vl_from_vq(vq) ((vq) * __SVE_VQ_BYTES)
#define __SVE_ZREG_SIZE(vq) ((__u32)(vq) * __SVE_VQ_BYTES)
#define __SVE_PREG_SIZE(vq) ((__u32)(vq) * (__SVE_VQ_BYTES / 8))
#define __SVE_FFR_SIZE(vq) __SVE_PREG_SIZE(vq)
#define __SVE_ZREGS_OFFSET 0
#define __SVE_ZREG_OFFSET(vq, n) \
(__SVE_ZREGS_OFFSET + __SVE_ZREG_SIZE(vq) * (n))
#define __SVE_ZREGS_SIZE(vq) \
(__SVE_ZREG_OFFSET(vq, __SVE_NUM_ZREGS) - __SVE_ZREGS_OFFSET)
#define __SVE_PREGS_OFFSET(vq) \
(__SVE_ZREGS_OFFSET + __SVE_ZREGS_SIZE(vq))
#define __SVE_PREG_OFFSET(vq, n) \
(__SVE_PREGS_OFFSET(vq) + __SVE_PREG_SIZE(vq) * (n))
#define __SVE_PREGS_SIZE(vq) \
(__SVE_PREG_OFFSET(vq, __SVE_NUM_PREGS) - __SVE_PREGS_OFFSET(vq))
#define __SVE_FFR_OFFSET(vq) \
(__SVE_PREGS_OFFSET(vq) + __SVE_PREGS_SIZE(vq))
#endif /* ! _UAPI__ASM_SVE_CONTEXT_H */
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