/*      $NetBSD: cpu.h,v 1.22 2023/10/06 11:45:37 skrll Exp $   */

/*-
* Copyright (c) 2006 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center, and by Charles M. Hannum.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/


/*-
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1982, 1990, 1993
*      The Regents of the University of California.  All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* 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.
* 4. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* from: Utah $Hdr: cpu.h 1.16 91/03/25$
*
*      @(#)cpu.h       8.4 (Berkeley) 1/5/94
*/


#ifndef _IA64_CPU_H_
#define _IA64_CPU_H_

#ifdef _KERNEL
#include <sys/cpu_data.h>
#include <sys/cctr.h>
#include <machine/frame.h>
#include <machine/ia64_cpu.h>
#include <machine/lock.h>
#include <sys/device_if.h>

struct cpu_info {

       /*
        * Public members.
        */

       struct cpu_data ci_data;        /* MI per-cpu data */
       device_t ci_dev;                /* pointer to our device */
       struct lwp *ci_curlwp;          /* current owner of the processor */
       struct lwp *ci_onproc;          /* current user LWP / kthread */
       struct cctr_state ci_cc;        /* cycle counter state */
       struct cpu_info *ci_next;       /* next cpu_info structure */

       volatile int ci_mtx_count;      /* Negative count of spin mutexes */
       volatile int ci_mtx_oldspl;     /* Old SPL at this ci_idepth */

       /* XXX: Todo */
       /*
        * Private members.
        */
       cpuid_t ci_cpuid;               /* our CPU ID */
       uint32_t ci_acpiid;             /* our ACPI/MADT ID */
       uint32_t ci_initapicid;         /* our initial APIC ID */
       struct pmap *ci_pmap;           /* current pmap */ /* XXX FreeBSD has *pcb_current_pmap in pcb ? */
       struct lwp *ci_fpcurlwp;        /* current owner of the FPU */
       paddr_t ci_curpcb;              /* PA of current HW PCB */
       struct pcb *ci_idle_pcb;        /* our idle PCB */
       u_int ci_want_resched;          /* preempt current process */
       u_int ci_unused;                /* unused */
       u_long ci_intrdepth;            /* interrupt trap depth */
       struct trapframe *ci_db_regs;   /* registers for debuggers */
       uint64_t ci_clock;              /* clock counter */
       uint64_t ci_clockadj;           /* clock adjust */
       uint64_t ci_vhpt;               /* address of vhpt */
};


extern struct cpu_info cpu_info_primary;
extern struct cpu_info *cpu_info_list;

#define CPU_INFO_ITERATOR               int __unused
#define CPU_INFO_FOREACH(cii, ci)       ci = cpu_info_list; \
                                       ci != NULL; ci = ci->ci_next
#ifdef MULTIPROCESSOR
/*
* XXX: TODO use percpu infrastructure that yamt proposed or use KR? for
* storing the percpu pointer.
*/
#else
#define curcpu() (&cpu_info_primary)
#endif /* MULTIPROCESSOR */
#define curlwp  (curcpu()->ci_curlwp)

#define cpu_number() 0              /*XXX: FIXME */

#define aston(l) ((l)->l_md.md_astpending = 1)

#define need_resched(ci,l,f)            /*XXX: FIXME */

struct clockframe {
       struct trapframe cf_tf;
};

#define CLKF_PC(cf)             (TRAPF_PC(&(cf)->cf_tf))
#define CLKF_CPL(cf)            (TRAPF_CPL(&(cf)->cf_tf))
#define CLKF_USERMODE(cf)       (TRAPF_USERMODE(&(cf)->cf_tf))
#define CLKF_INTR(frame)        (curcpu()->ci_intrdepth)

#define TRAPF_PC(tf)            ((tf)->tf_special.iip)
#define TRAPF_CPL(tf)           ((tf)->tf_special.psr & IA64_PSR_CPL)
#define TRAPF_USERMODE(tf)      (TRAPF_CPL(tf) != IA64_PSR_CPL_KERN)

/*
* Give a profiling tick to the current process when the user profiling
* buffer pages are invalid. XXX:Fixme.... On the ia64 I haven't yet figured
* out what to do about this.. XXX.
*/
/* extern void  cpu_need_proftick(struct lwp *l); */
#define cpu_need_proftick(l) __nothing

/*
* Notify the LWP l that it has a signal pending, process as soon as possible.
*/
#define cpu_signotify(l)        aston(l)

// void cpu_need_resched(struct cpu_info *ci, int flags)
#define cpu_need_resched(ci, l, f) do { \
       __USE(ci);                      \
       __USE(f);                       \
} while(/*CONSTCOND*/0)

#define setsoftclock()        __nothing       /*XXX: FIXME */

/* machdep.c */
int cpu_maxproc(void); /*XXX: Fill in machdep.c */

#define cpu_proc_fork(p1, p2)  __nothing        /* XXX: Look into this. */

#define DELAY(x)         __nothing      /* XXX: FIXME */

#define cpu_idle()      ia64_pause()

#endif /* _KERNEL_ */
#endif /* _IA64_CPU_H */

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