freebsd-nq/sys/i386/include/globaldata.h
Jake Burkholder f8761e53a7 Implement accessors for per-cpu variables which don't depend on the
symbols in globals.s.

	PCPU_GET(name) returns the value of the per-cpu variable
	PCPU_PTR(name) returns a pointer to the per-cpu variable
	PCPU_SET(name, val) sets the value of the per-cpu variable

In general these are not yet used, compatibility macros remain.

Unifdef SMP struct globaldata, this makes variables such as cpuid
available for UP as well.

Rebuilding modules is probably a good idea, but I believe old
modules will still work, as most of the old infrastructure
remains.
2001-01-06 19:55:42 +00:00

123 lines
3.9 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 <vm/vm.h>
#include <vm/pmap.h>
#include <machine/pmap.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;
int gd_inside_intr;
u_int gd_ss_eflags;
pt_entry_t *gd_prv_CMAP1;
pt_entry_t *gd_prv_CMAP2;
pt_entry_t *gd_prv_CMAP3;
pt_entry_t *gd_prv_PMAP1;
caddr_t gd_prv_CADDR1;
caddr_t gd_prv_CADDR2;
caddr_t gd_prv_CADDR3;
unsigned *gd_prv_PADDR1;
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_ */