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/*-
* 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.
*
* $Id: globaldata.h,v 1.7 1999/02/22 15:13:34 bde Exp $
*/
/*
* 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 privatespace *gd_prvspace; /* self-reference */
struct proc *gd_curproc;
struct proc *gd_npxproc;
struct pcb *gd_curpcb;
struct timeval gd_switchtime;
struct i386tss gd_common_tss;
int gd_switchticks;
#ifdef VM86
struct segment_descriptor gd_common_tssd;
#endif
#ifdef USER_LDT
int gd_currentldt;
#endif
#ifdef SMP
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;
#endif
};
#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
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