c342b9faa3
for it is incomplete and buggy. There is no problem unless Xintr0() is reentered or should be reentered, but high clock interrupt frequencies for pcaudio cause Xintr0() to be reentered (or clock ticks to be lost when Xintr0() should have been reentered but wasn't), and we lose little by delaying the call to softclock(). Move declarations related to the clock driver to clock.h. Move declarations related to the npx driver to npx.h. Clean up the remaining declarations.
136 lines
4.6 KiB
C
136 lines
4.6 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 1.15 1994/10/18 03:37:31 ache Exp $
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*/
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#ifndef _MACHINE_CPU_H_
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#define _MACHINE_CPU_H_
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/*
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* Definitions unique to i386 cpu support.
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*/
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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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#undef COPY_SIGCODE /* don't copy sigcode above user stack in exec */
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#define cpu_exec(p) /* nothing */
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#define cpu_swapin(p) /* nothing */
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#define cpu_setstack(p, ap) (p)->p_md.md_regs = ap
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#define cpu_set_init_frame(p, fp) (p)->p_md.md_regs = fp
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#define CLKF_USERMODE(framep) (ISPL((framep)->cf_cs) == SEL_UPL)
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#define CLKF_INTR(framep) (0)
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#if 0
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/*
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* XXX splsoftclock() is very broken and barely worth fixing. It doesn't
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* turn off the clock bit in imen or in the icu. (This is not a serious
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* problem at 100 Hz but it is serious at 16000 Hz for pcaudio. softclock()
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* can take more than 62.5 usec so clock interrupts are lost.) It doesn't
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* check for pending interrupts being unmasked. clkintr() and Xintr0()
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* assume that the ipl is high when hardclock() returns. Our SWI_AST
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* handling is efficient enough that little is gained by calling
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* softclock() directly.
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*/
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#define CLKF_BASEPRI(framep) (((framep)->cf_ppl & ~SWI_AST_MASK) == 0)
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#else
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#define CLKF_BASEPRI(framep) (0)
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#endif
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#define CLKF_PC(framep) ((framep)->cf_eip)
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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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#define need_resched() { want_resched = 1; aston(); }
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/*
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* Give a profiling tick to the current process from the softclock
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* interrupt. On tahoe, request an ast to send us through trap(),
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* marking the proc as needing a profiling tick.
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*/
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#define need_proftick(p) { (p)->p_flag |= P_OWEUPC; aston(); }
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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) aston()
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#define aston() setsoftast()
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#define astoff()
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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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/*
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* CTL_MACHDEP definitions.
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*/
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#define CPU_CONSDEV 1 /* dev_t: console terminal device */
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#define CPU_ADJKERNTZ 2 /* int: timezone offset for resettodr() */
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#define CPU_DISRTCSET 3 /* int: disable resettodr() call */
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#define CPU_MAXID 4 /* number of valid machdep ids */
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#define CTL_MACHDEP_NAMES { \
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{ 0, 0 }, \
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{ "console_device", CTLTYPE_STRUCT }, \
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{ "adjkerntz", CTLTYPE_INT }, \
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{ "disable_rtc_set", CTLTYPE_INT }, \
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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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extern int want_resched; /* resched was called */
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int cpu_fork __P((struct proc *, struct proc *));
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#endif
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#endif /* !_MACHINE_CPU_H_ */
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