c45422f874
for SMP; just use the same ones as UP. These weren't used without holding Giant anyway, and the routines that use them would have to be protected from pre-emption to avoid migrating cpus.
110 lines
3.5 KiB
C
110 lines
3.5 KiB
C
/*-
|
|
* Copyright (c) Peter Wemm <peter@netplex.com.au>
|
|
* All rights reserved.
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _MACHINE_GLOBALDATA_H_
|
|
#define _MACHINE_GLOBALDATA_H_
|
|
|
|
#include <machine/segments.h>
|
|
#include <machine/tss.h>
|
|
|
|
/* XXX */
|
|
#ifdef KTR_PERCPU
|
|
#include <sys/ktr.h>
|
|
#endif
|
|
|
|
/*
|
|
* This structure maps out the global data that needs to be kept on a
|
|
* per-cpu basis. genassym uses this to generate offsets for the assembler
|
|
* code, which also provides external symbols so that C can get at them as
|
|
* though they were really globals.
|
|
*
|
|
* The SMP parts are setup in pmap.c and locore.s for the BSP, and
|
|
* mp_machdep.c sets up the data for the AP's to "see" when they awake.
|
|
* The reason for doing it via a struct is so that an array of pointers
|
|
* to each CPU's data can be set up for things like "check curproc on all
|
|
* other processors"
|
|
*/
|
|
struct globaldata {
|
|
struct globaldata *gd_prvspace; /* self-reference */
|
|
struct proc *gd_curproc;
|
|
struct proc *gd_npxproc;
|
|
struct pcb *gd_curpcb;
|
|
struct proc *gd_idleproc;
|
|
struct timeval gd_switchtime;
|
|
struct i386tss gd_common_tss;
|
|
int gd_switchticks;
|
|
u_char gd_intr_nesting_level;
|
|
u_char gd_pad0[3];
|
|
struct segment_descriptor gd_common_tssd;
|
|
struct segment_descriptor *gd_tss_gdt;
|
|
int gd_currentldt; /* only used for USER_LDT */
|
|
u_int gd_cpuid;
|
|
u_int gd_cpu_lockid;
|
|
u_int gd_other_cpus;
|
|
u_int gd_astpending;
|
|
SLIST_ENTRY(globaldata) gd_allcpu;
|
|
int gd_witness_spin_check;
|
|
#ifdef KTR_PERCPU
|
|
#ifdef KTR
|
|
volatile int gd_ktr_idx;
|
|
char *gd_ktr_buf;
|
|
char gd_ktr_buf_data[KTR_SIZE];
|
|
#endif
|
|
#endif
|
|
};
|
|
|
|
SLIST_HEAD(cpuhead, globaldata);
|
|
extern struct cpuhead cpuhead;
|
|
|
|
#ifdef SMP
|
|
/*
|
|
* This is the upper (0xff800000) address space layout that is per-cpu.
|
|
* It is setup in locore.s and pmap.c for the BSP and in mp_machdep.c for
|
|
* each AP. genassym helps export this to the assembler code.
|
|
*/
|
|
struct privatespace {
|
|
/* page 0 - data page */
|
|
struct globaldata globaldata;
|
|
char __filler0[PAGE_SIZE - sizeof(struct globaldata)];
|
|
|
|
/* page 1..4 - CPAGE1,CPAGE2,CPAGE3,PPAGE1 */
|
|
char CPAGE1[PAGE_SIZE];
|
|
char CPAGE2[PAGE_SIZE];
|
|
char CPAGE3[PAGE_SIZE];
|
|
char PPAGE1[PAGE_SIZE];
|
|
|
|
/* page 5..4+UPAGES - idle stack (UPAGES pages) */
|
|
char idlestack[UPAGES * PAGE_SIZE];
|
|
};
|
|
|
|
extern struct privatespace SMP_prvspace[];
|
|
|
|
#endif
|
|
|
|
#endif /* ! _MACHINE_GLOBALDATA_H_ */
|