/*      $NetBSD: cpu.h,v 1.72 2023/09/04 20:58:52 mrg Exp $     */

/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* 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.
* 3. 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.
*
*      @(#)cpu.h       5.4 (Berkeley) 5/9/91
*/

#ifndef _AMD64_CPU_H_
#define _AMD64_CPU_H_

#ifdef __x86_64__

#include <x86/cpu.h>

#ifdef _KERNEL

#if defined(__GNUC__) && !defined(_MODULE)

static struct cpu_info *x86_curcpu(void);
static lwp_t *x86_curlwp(void);

/*
* XXXGCC12 has:
* ./machine/cpu.h:57:9: error: array subscript 0 is outside array bounds of 'struct cpu_info * const[0]' [-Werror=array-bounds]
*    56 |         __asm("movq %%gs:%1, %0" :
*/
#pragma GCC push_options
#pragma GCC diagnostic ignored "-Warray-bounds"

__inline __always_inline static struct cpu_info * __unused __nomsan
x86_curcpu(void)
{
       struct cpu_info *ci;

       __asm("movq %%gs:%1, %0" :
           "=r" (ci) :
           "m"
           (*(struct cpu_info * const *)offsetof(struct cpu_info, ci_self)));
       return ci;
}

__inline static lwp_t * __unused __nomsan __attribute__ ((const))
x86_curlwp(void)
{
       lwp_t *l;

       __asm("movq %%gs:%1, %0" :
           "=r" (l) :
           "m"
           (*(struct cpu_info * const *)offsetof(struct cpu_info, ci_curlwp)));
       return l;
}

#pragma GCC pop_options

#endif  /* __GNUC__ && !_MODULE */

#ifdef XENPV
#define CLKF_USERMODE(frame)    (curcpu()->ci_xen_clockf_usermode)
#define CLKF_PC(frame)          (curcpu()->ci_xen_clockf_pc)
#else /* XENPV */
#define CLKF_USERMODE(frame)    USERMODE((frame)->cf_if.if_tf.tf_cs)
#define CLKF_PC(frame)          ((frame)->cf_if.if_tf.tf_rip)
#endif /* XENPV */
#define CLKF_INTR(frame)        (curcpu()->ci_idepth > 0)
#define LWP_PC(l)               ((l)->l_md.md_regs->tf_rip)

void *cpu_uarea_alloc(bool);
bool cpu_uarea_free(void *);

#endif  /* _KERNEL */

#else   /*      __x86_64__      */

#include <i386/cpu.h>

#endif  /*      __x86_64__      */

#endif /* !_AMD64_CPU_H_ */