118 lines
3.9 KiB
C
118 lines
3.9 KiB
C
/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)cpu.h 5.4 (Berkeley) 5/9/91
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* $Id: cpu.h,v 1.12 1993/12/17 00:10:49 mycroft Exp $
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*/
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/*
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* Definitions unique to i386 cpu support.
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*/
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#include <machine/psl.h>
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#include <machine/frame.h>
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#include <machine/segments.h>
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/*
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* definitions of cpu-dependent requirements
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* referenced in generic code
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*/
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#define COPY_SIGCODE /* copy sigcode above user stack in exec */
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#define cpu_exec(p) /* nothing */
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/*
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* Arguments to hardclock, softclock and gatherstats
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* encapsulate the previous machine state in an opaque
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* clockframe; for now, use generic intrframe.
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*
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* XXX intrframe has a lot of gunk we don't need.
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*/
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typedef struct intrframe clockframe;
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#define CLKF_USERMODE(framep) (ISPL((framep)->if_cs) == SEL_UPL)
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#define CLKF_BASEPRI(framep) ((framep)->if_ppl == 0)
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#define CLKF_PC(framep) ((framep)->if_eip)
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#define CLKF_INTR(framep) (0) /* XXX should have an interrupt stack */
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/*
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* Software interrupt request `register'.
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*/
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int sir;
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#define SIR_AST 0
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#define SIR_NET 1
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#define SIR_CLOCK 2
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#define softintr(n) (sir |= 1 << (n))
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#define setsoftnet() softintr(SIR_NET)
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#define setsoftclock() softintr(SIR_CLOCK)
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/*
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* Preempt the current process if in interrupt from user mode,
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* or after the current trap/syscall if in system mode.
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*/
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int want_resched; /* resched() was called */
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#define need_resched() (want_resched = 1, softintr(SIR_AST))
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/*
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* Give a profiling tick to the current process when the user profiling
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* buffer pages are invalid. On the i386, request an ast to send us
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* through trap(), marking the proc as needing a profiling tick.
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*/
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#define profile_tick(p, framep) ((p)->p_flag |= SOWEUPC, softintr(SIR_AST))
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#define need_proftick(p) ((p)->p_flag |= SOWEUPC, softintr(SIR_AST))
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/*
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* Notify the current process (p) that it has a signal pending,
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* process as soon as possible.
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*/
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#define signotify(p) softintr(SIR_AST)
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/*
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* pull in #defines for kinds of processors
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*/
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#include "machine/cputypes.h"
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struct cpu_nameclass {
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char *cpu_name;
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int cpu_class;
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};
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#ifdef KERNEL
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extern int cpu;
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extern int cpu_class;
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extern struct cpu_nameclass i386_cpus[];
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#endif
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