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6c56727456
return through doreti to handle ast's. This is necessary for the clock interrupts to work properly. - Change the clock interrupts on the x86 to be fast instead of threaded. This is needed because both hardclock() and statclock() need to run in the context of the current process, not in a separate thread context. - Kill the prevproc hack as it is no longer needed. - We really need Giant when we call psignal(), but we don't want to block during the clock interrupt. Instead, use two p_flag's in the proc struct to mark the current process as having a pending SIGVTALRM or a SIGPROF and let them be delivered during ast() when hardclock() has finished running. - Remove CLKF_BASEPRI, which was #ifdef'd out on the x86 anyways. It was broken on the x86 if it was turned on since cpl is gone. It's only use was to bogusly run softclock() directly during hardclock() rather than scheduling an SWI. - Remove the COM_LOCK simplelock and replace it with a clock_lock spin mutex. Since the spin mutex already handles disabling/restoring interrupts appropriately, this also lets us axe all the *_intr() fu. - Back out the hacks in the APIC_IO x86 cpu_initclocks() code to use temporary fast interrupts for the APIC trial. - Add two new process flags P_ALRMPEND and P_PROFPEND to mark the pending signals in hardclock() that are to be delivered in ast(). Submitted by: jakeb (making statclock safe in a fast interrupt) Submitted by: cp (concept of delaying signals until ast())
126 lines
3.9 KiB
C
126 lines
3.9 KiB
C
/*-
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* Copyright (c) Peter Wemm <peter@netplex.com.au>
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* All rights reserved.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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* $FreeBSD$
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*/
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#ifndef _MACHINE_GLOBALDATA_H_
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#define _MACHINE_GLOBALDATA_H_
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <machine/pmap.h>
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#include <machine/segments.h>
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#include <machine/tss.h>
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/* XXX */
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#ifdef KTR_PERCPU
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#include <sys/ktr.h>
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#endif
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/*
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* This structure maps out the global data that needs to be kept on a
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* per-cpu basis. genassym uses this to generate offsets for the assembler
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* code, which also provides external symbols so that C can get at them as
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* though they were really globals.
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*
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* The SMP parts are setup in pmap.c and locore.s for the BSP, and
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* mp_machdep.c sets up the data for the AP's to "see" when they awake.
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* The reason for doing it via a struct is so that an array of pointers
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* to each CPU's data can be set up for things like "check curproc on all
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* other processors"
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*/
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struct globaldata {
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struct privatespace *gd_prvspace; /* self-reference */
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struct proc *gd_curproc;
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struct proc *gd_npxproc;
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struct pcb *gd_curpcb;
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struct proc *gd_idleproc;
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struct timeval gd_switchtime;
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struct i386tss gd_common_tss;
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int gd_switchticks;
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int gd_intr_nesting_level;
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struct segment_descriptor gd_common_tssd;
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struct segment_descriptor *gd_tss_gdt;
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int gd_currentldt; /* only used for USER_LDT */
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#ifdef SMP
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u_int gd_cpuid;
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u_int gd_cpu_lockid;
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u_int gd_other_cpus;
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int gd_inside_intr;
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u_int gd_ss_eflags;
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pt_entry_t *gd_prv_CMAP1;
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pt_entry_t *gd_prv_CMAP2;
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pt_entry_t *gd_prv_CMAP3;
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pt_entry_t *gd_prv_PMAP1;
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caddr_t gd_prv_CADDR1;
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caddr_t gd_prv_CADDR2;
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caddr_t gd_prv_CADDR3;
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unsigned *gd_prv_PADDR1;
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#endif
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u_int gd_astpending;
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SLIST_ENTRY(globaldata) gd_allcpu;
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int gd_witness_spin_check;
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#ifdef KTR_PERCPU
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#ifdef KTR
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volatile int gd_ktr_idx;
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char *gd_ktr_buf;
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char gd_ktr_buf_data[KTR_SIZE];
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#endif
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#endif
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};
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extern struct globaldata globaldata;
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SLIST_HEAD(cpuhead, globaldata);
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extern struct cpuhead cpuhead;
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#ifdef SMP
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/*
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* This is the upper (0xff800000) address space layout that is per-cpu.
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* It is setup in locore.s and pmap.c for the BSP and in mp_machdep.c for
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* each AP. genassym helps export this to the assembler code.
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*/
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struct privatespace {
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/* page 0 - data page */
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struct globaldata globaldata;
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char __filler0[PAGE_SIZE - sizeof(struct globaldata)];
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/* page 1..4 - CPAGE1,CPAGE2,CPAGE3,PPAGE1 */
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char CPAGE1[PAGE_SIZE];
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char CPAGE2[PAGE_SIZE];
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char CPAGE3[PAGE_SIZE];
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char PPAGE1[PAGE_SIZE];
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/* page 5..4+UPAGES - idle stack (UPAGES pages) */
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char idlestack[UPAGES * PAGE_SIZE];
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};
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extern struct privatespace SMP_prvspace[];
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#endif
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#endif /* ! _MACHINE_GLOBALDATA_H_ */
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