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/* $NetBSD: cpu.h,v 1.33 1996/03/29 00:23:28 mycroft 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 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.
*
* @(#)cpu.h 5.4 (Berkeley) 5/9/91
*/
#ifndef _I386_CPU_H_
#define _I386_CPU_H_
/*
* Definitions unique to i386 cpu support.
*/
#include <machine/psl.h>
#include <machine/frame.h>
#include <machine/segments.h>
/*
* definitions of cpu-dependent requirements
* referenced in generic code
*/
#define cpu_swapin(p) /* nothing */
#define cpu_wait(p) /* nothing */
/*
* Arguments to hardclock, softclock and statclock
* encapsulate the previous machine state in an opaque
* clockframe; for now, use generic intrframe.
*
* XXX intrframe has a lot of gunk we don't need.
*/
#define clockframe intrframe
#define CLKF_USERMODE(frame) USERMODE((frame)->if_cs, (frame)->if_eflags)
#define CLKF_BASEPRI(frame) ((frame)->if_ppl == 0)
#define CLKF_PC(frame) ((frame)->if_eip)
#define CLKF_INTR(frame) (0) /* XXX should have an interrupt stack */
/*
* Preempt the current process if in interrupt from user mode,
* or after the current trap/syscall if in system mode.
*/
int want_resched; /* resched() was called */
#define need_resched() (want_resched = 1, setsoftast())
/*
* Give a profiling tick to the current process when the user profiling
* buffer pages are invalid. On the i386, request an ast to send us
* through trap(), marking the proc as needing a profiling tick.
*/
#define need_proftick(p) ((p)->p_flag |= P_OWEUPC, setsoftast())
/*
* Notify the current process (p) that it has a signal pending,
* process as soon as possible.
*/
#define signotify(p) setsoftast()
/*
* We need a machine-independent name for this.
*/
#define DELAY(x) delay(x)
void delay __P((int));
#ifdef I586_CPU
/*
* High resolution clock support (Pentium only)
*/
#define CPU_CLOCKUPDATE(otime, ntime) \
do { \
if (pentium_mhz) { \
__asm __volatile("cli\n" \
"movl (%2), %%eax\n" \
"movl %%eax, (%1)\n" \
"movl 4(%2), %%eax\n" \
"movl %%eax, 4(%1)\n" \
"movl $0x10, %%ecx\n" \
"xorl %%eax, %%eax\n" \
"movl %%eax, %%edx\n" \
".byte 0xf, 0x30\n" \
"sti\n" \
"#%0%1%2" \
: "=m" (*otime) \
: "c" (otime), "b" (ntime) \
: "ax", "cx", "dx"); \
} \
else { \
*(otime) = *(ntime); \
} \
} while (0)
#endif
void delay __P((int));
/*
* pull in #defines for kinds of processors
*/
#include <machine/cputypes.h>
struct cpu_nameclass {
char *cpu_name;
int cpu_class;
};
#ifdef _KERNEL
extern int cpu;
extern int cpu_class;
extern struct cpu_nameclass i386_cpus[];
#ifdef I586_CPU
extern int pentium_mhz;
#endif
#endif
/*
* CTL_MACHDEP definitions.
*/
#define CPU_CONSDEV 1 /* dev_t: console terminal device */
#define CPU_MAXID 2 /* number of valid machdep ids */
#define CTL_MACHDEP_NAMES { \
{ 0, 0 }, \
{ "console_device", CTLTYPE_STRUCT }, \
}
#endif /* !_I386_CPU_H_ */
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