089abdad44
process context ('reaper').
From within the exiting process context:
* deactivate pmap and free vmspace while we can still block
* introduce MD cpu_lwp_free() - this cleans all MD-specific context (such
as FPU state), and is the last potentially blocking operation;
all of cpu_wait(), and most of cpu_exit(), is now folded into cpu_lwp_free()
* process is now immediatelly marked as zombie and made available for pickup
by parent; the remaining last lwp continues the exit as fully detached
* MI (rather than MD) code bumps uvmexp.swtch, cpu_exit() is now same
for both 'process' and 'lwp' exit
uvm_lwp_exit() is modified to never block; the u-area memory is now
always just linked to the list of available u-areas. Introduce (blocking)
uvm_uarea_drain(), which is called to release the excessive u-area memory;
this is called by parent within wait4(), or by pagedaemon on memory shortage.
uvm_uarea_free() is now private function within uvm_glue.c.
MD process/lwp exit code now always calls lwp_exit2() immediatelly after
switching away from the exiting lwp.
g/c now unneeded routines and variables, including the reaper kernel thread
219 lines
7.7 KiB
C
219 lines
7.7 KiB
C
/* $NetBSD: cpu.h,v 1.35 2004/01/04 11:33:31 jdolecek Exp $ */
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/*
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* Copyright (c) 1982, 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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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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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. 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: Utah Hdr: cpu.h 1.16 91/03/25
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* from: @(#)cpu.h 7.7 (Berkeley) 6/27/91
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* cpu.h,v 1.2 1993/05/22 07:58:17 cgd Exp
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*/
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/*
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* Copyright (c) 1994 Gordon W. Ross
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* Copyright (c) 1993 Adam Glass
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* Copyright (c) 1988 University of Utah.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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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: Utah Hdr: cpu.h 1.16 91/03/25
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* from: @(#)cpu.h 7.7 (Berkeley) 6/27/91
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* cpu.h,v 1.2 1993/05/22 07:58:17 cgd Exp
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*/
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#ifndef _CPU_H_
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#define _CPU_H_
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#if defined(_KERNEL_OPT)
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#include "opt_lockdebug.h"
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#endif
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/*
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* Get common m68k CPU definitions.
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*/
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#include <m68k/cpu.h>
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#ifdef _KERNEL
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/*
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* External definitions unique to sun3/68k cpu support.
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* These are the "public" declarations - those needed in
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* machine-independent source code. The "priviate" ones
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* are in machdep.h (used only inside sys/arch/sun3).
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*
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* Note that the name of this file is NOT meant to imply
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* that it has anything to do with mc68020 CPU stuff.
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* The name "cpu" is historical, and used in the common
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* code to identify machine-dependent functions, etc.
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*/
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#include <sys/sched.h>
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struct cpu_info {
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struct schedstate_percpu ci_schedstate; /* scheduler state */
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#if defined(DIAGNOSTIC) || defined(LOCKDEBUG)
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u_long ci_spin_locks; /* # of spin locks held */
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u_long ci_simple_locks; /* # of simple locks held */
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#endif
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};
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extern struct cpu_info cpu_info_store;
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#define curcpu() (&cpu_info_store)
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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 cpu_number() 0
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#define cpu_swapin(p) /* nothing */
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#define cpu_swapout(p) /* nothing */
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void cpu_proc_fork(struct proc *, struct proc *);
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/*
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* Arguments to hardclock and gatherstats encapsulate the previous
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* machine state in an opaque clockframe. One the sun3, we use
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* what the locore.s glue puts on the stack before calling C-code.
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*/
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struct clockframe {
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u_int cf_regs[4]; /* d0,d1,a0,a1 */
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u_short cf_sr; /* sr at time of interrupt */
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u_long cf_pc; /* pc at time of interrupt */
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u_short cf_vo; /* vector offset (4-word frame) */
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} __attribute__((packed));
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#define CLKF_USERMODE(framep) (((framep)->cf_sr & PSL_S) == 0)
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#define CLKF_BASEPRI(framep) (((framep)->cf_sr & PSL_IPL) == 0)
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#define CLKF_PC(framep) ((framep)->cf_pc)
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#if 0
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/* We would like to do it this way... */
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#define CLKF_INTR(framep) (((framep)->cf_sr & PSL_M) == 0)
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#else
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/* but until we start using PSL_M, we have to do this instead */
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#define CLKF_INTR(framep) (0) /* XXX */
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#endif
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extern int astpending; /* need to trap before returning to user mode */
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#define aston() (astpending = 1)
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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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extern int want_resched; /* resched() was called */
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#define need_resched(ci) { want_resched = 1; aston(); }
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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 sun3, 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 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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/*
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* Software Interrupt Register (SIR)
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* The sun3 has a real software interrupt register set by
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* isr_soft_request() so this scheme just multiplexes four
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* software interrupt `sources' on the level one handler.
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*/
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extern void isr_soft_request __P((int level));
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union sun3sir {
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int sir_any;
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char sir_which[4];
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};
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extern union sun3sir sun3sir;
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#define SIR_NET 0
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#define SIR_CLOCK 1
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#define SIR_SPARE2 2
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#define SIR_SPARE3 3
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#define setsoftint(x) isr_soft_request(x)
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#define setsoftnet() (sun3sir.sir_which[SIR_NET] = 1, setsoftint(1))
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#define setsoftclock() (sun3sir.sir_which[SIR_CLOCK] = 1, setsoftint(1))
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int cachectl1 __P((unsigned long, vaddr_t, size_t, struct proc *));
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/*
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* functions here for lack of a better place.
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*/
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struct pcb;
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void proc_trampoline __P((void));
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void savectx __P((struct pcb *));
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void switch_exit __P((struct lwp *));
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void switch_lwp_exit __P((struct lwp *));
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#ifdef _SUN3_
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#define M68K_VAC
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#endif
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#endif /* _KERNEL */
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#include <m68k/sysctl.h>
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#endif /* _CPU_H_ */
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