/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */
/*
 * Copyright (C) 2012 Regents of the University of California
 */

#ifndef _UAPI_ASM_RISCV_PTRACE_H
#define _UAPI_ASM_RISCV_PTRACE_H

#ifndef __ASSEMBLY__

#include <linux/types.h>

/*
 * User-mode register state for core dumps, ptrace, sigcontext
 *
 * This decouples struct pt_regs from the userspace ABI.
 * struct user_regs_struct must form a prefix of struct pt_regs.
 */
struct user_regs_struct {
	unsigned long pc;
	unsigned long ra;
	unsigned long sp;
	unsigned long gp;
	unsigned long tp;
	unsigned long t0;
	unsigned long t1;
	unsigned long t2;
	unsigned long s0;
	unsigned long s1;
	unsigned long a0;
	unsigned long a1;
	unsigned long a2;
	unsigned long a3;
	unsigned long a4;
	unsigned long a5;
	unsigned long a6;
	unsigned long a7;
	unsigned long s2;
	unsigned long s3;
	unsigned long s4;
	unsigned long s5;
	unsigned long s6;
	unsigned long s7;
	unsigned long s8;
	unsigned long s9;
	unsigned long s10;
	unsigned long s11;
	unsigned long t3;
	unsigned long t4;
	unsigned long t5;
	unsigned long t6;
};

struct __riscv_f_ext_state {
	__u32 f[32];
	__u32 fcsr;
};

struct __riscv_d_ext_state {
	__u64 f[32];
	__u32 fcsr;
};

struct __riscv_q_ext_state {
	__u64 f[64] __attribute__((aligned(16)));
	__u32 fcsr;
	/*
	 * Reserved for expansion of sigcontext structure.  Currently zeroed
	 * upon signal, and must be zero upon sigreturn.
	 */
	__u32 reserved[3];
};

struct __riscv_ctx_hdr {
	__u32 magic;
	__u32 size;
};

struct __riscv_extra_ext_header {
	__u32 __padding[129] __attribute__((aligned(16)));
	/*
	 * Reserved for expansion of sigcontext structure.  Currently zeroed
	 * upon signal, and must be zero upon sigreturn.
	 */
	__u32 reserved;
	struct __riscv_ctx_hdr hdr;
};

union __riscv_fp_state {
	struct __riscv_f_ext_state f;
	struct __riscv_d_ext_state d;
	struct __riscv_q_ext_state q;
};

struct __riscv_v_ext_state {
	unsigned long vstart;
	unsigned long vl;
	unsigned long vtype;
	unsigned long vcsr;
	void *datap;
	/*
	 * In signal handler, datap will be set a correct user stack offset
	 * and vector registers will be copied to the address of datap
	 * pointer.
	 *
	 * In ptrace syscall, datap will be set to zero and the vector
	 * registers will be copied to the address right after this
	 * structure.
	 */
};

/*
 * According to spec: The number of bits in a single vector register,
 * VLEN >= ELEN, which must be a power of 2, and must be no greater than
 * 2^16 = 65536bits = 8192bytes
 */
#define RISCV_MAX_VLENB (8192)

#endif /* __ASSEMBLY__ */

#endif /* _UAPI_ASM_RISCV_PTRACE_H */