/*-
 * Copyright (c) 2001 Jake Burkholder.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifdef __arm__
#include <arm/pcb.h>
#else /* !__arm__ */

#ifndef _MACHINE_PCB_H_
#define _MACHINE_PCB_H_

#ifndef LOCORE

#include <machine/debug_monitor.h>
#include <machine/vfp.h>

struct trapframe;

/* The first register in pcb_x is x19 */
#define PCB_X_START     19

#define PCB_X19         0
#define PCB_X20         1
#define PCB_FP          10
#define PCB_LR          11

struct pcb {
        uint64_t        pcb_x[12];
        /* These two need to be in order as we access them together */
        uint64_t        pcb_sp;
        uint64_t        pcb_tpidr_el0;
        uint64_t        pcb_tpidrro_el0;

        /* Fault handler, the error value is passed in x0 */
        vm_offset_t     pcb_onfault;

        u_int           pcb_flags;
#define PCB_SINGLE_STEP_SHIFT   0
#define PCB_SINGLE_STEP         (1 << PCB_SINGLE_STEP_SHIFT)
        u_int           pcb_sve_len;    /* The SVE vector length */

        struct vfpstate *pcb_fpusaved;
        int             pcb_fpflags;
#define PCB_FP_STARTED  0x00000001
#define PCB_FP_SVEVALID 0x00000002
#define PCB_FP_KERN     0x40000000
#define PCB_FP_NOSAVE   0x80000000
/* The bits passed to userspace in get_fpcontext */
#define PCB_FP_USERMASK (PCB_FP_STARTED | PCB_FP_SVEVALID)
        u_int           pcb_vfpcpu;     /* Last cpu this thread ran VFP code */
        void            *pcb_svesaved;
        uint64_t        pcb_reserved[4];

        /*
         * The userspace VFP state. The pcb_fpusaved pointer will point to
         * this unless the kernel has allocated a VFP context.
         * Place last to simplify the asm to access the rest if the struct.
         */
        struct vfpstate pcb_fpustate;

        struct debug_monitor_state pcb_dbg_regs;
};

#ifdef _KERNEL
void    makectx(struct trapframe *tf, struct pcb *pcb);
void    savectx(struct pcb *pcb) __returns_twice;
#endif

#endif /* !LOCORE */

#endif /* !_MACHINE_PCB_H_ */

#endif /* !__arm__ */