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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 1.4 1998/05/17 23:08:02 tegge 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 proc *curproc;
struct proc *npxproc;
struct pcb *curpcb;
struct i386tss common_tss;
struct timeval switchtime;
#ifdef VM86
struct segment_descriptor common_tssd;
u_int private_tss;
u_int my_tr;
#endif
#ifdef SMP
u_int cpuid;
u_int cpu_lockid;
u_int other_cpus;
pd_entry_t *my_idlePTD;
u_int ss_eflags;
pt_entry_t *prv_CMAP1;
pt_entry_t *prv_CMAP2;
pt_entry_t *prv_CMAP3;
pt_entry_t *prv_PMAP1;
int inside_intr;
#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 - page table page */
pt_entry_t prvpt[NPTEPG];
/* page 2 - local apic mapping */
lapic_t lapic;
char __filler1[PAGE_SIZE - sizeof(lapic_t)];
/* page 3..2+UPAGES - idle stack (UPAGES pages) */
char idlestack[UPAGES * PAGE_SIZE];
/* page 3+UPAGES..6+UPAGES - CPAGE1,CPAGE2,CPAGE3,PPAGE1 */
char CPAGE1[PAGE_SIZE];
char CPAGE2[PAGE_SIZE];
char CPAGE3[PAGE_SIZE];
char PPAGE1[PAGE_SIZE];
/* page 7+UPAGES..15 - spare, unmapped */
char __filler2[(9-UPAGES) * PAGE_SIZE];
/* page 16-31 - space for IO apics */
char ioapics[16 * PAGE_SIZE];
/* page 32-47 - maybe other cpu's globaldata pages? */
};
#endif
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