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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* arch/arm/include/asm/fpstate.h
*
* Copyright (C) 1995 Russell King
*/
#ifndef __ASM_ARM_FPSTATE_H
#define __ASM_ARM_FPSTATE_H
#ifndef __ASSEMBLY__
/*
* VFP storage area has:
* - FPEXC, FPSCR, FPINST and FPINST2.
* - 16 or 32 double precision data registers
* - an implementation-dependent word of state for FLDMX/FSTMX (pre-ARMv6)
*
* FPEXC will always be non-zero once the VFP has been used in this process.
*/
struct vfp_hard_struct {
#ifdef CONFIG_VFPv3
__u64 fpregs[32];
#else
__u64 fpregs[16];
#endif
#if __LINUX_ARM_ARCH__ < 6
__u32 fpmx_state;
#endif
__u32 fpexc;
__u32 fpscr;
/*
* VFP implementation specific state
*/
__u32 fpinst;
__u32 fpinst2;
#ifdef CONFIG_SMP
__u32 cpu;
#endif
};
union vfp_state {
struct vfp_hard_struct hard;
};
extern void vfp_flush_thread(union vfp_state *);
extern void vfp_release_thread(union vfp_state *);
#define FP_HARD_SIZE 35
struct fp_hard_struct {
unsigned int save[FP_HARD_SIZE]; /* as yet undefined */
};
#define FP_SOFT_SIZE 35
struct fp_soft_struct {
unsigned int save[FP_SOFT_SIZE]; /* undefined information */
};
#define IWMMXT_SIZE 0x98
struct iwmmxt_struct {
unsigned int save[IWMMXT_SIZE / sizeof(unsigned int)];
};
union fp_state {
struct fp_hard_struct hard;
struct fp_soft_struct soft;
#ifdef CONFIG_IWMMXT
struct iwmmxt_struct iwmmxt;
#endif
};
#define FP_SIZE (sizeof(union fp_state) / sizeof(int))
#endif
#endif
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