e796e00de3
Clean up (or if antipodic: down) some of the msgbuf stuff. Use an inline function rather than a macro for timecounter delta. Maintain process "on-cpu" time as 64 bits of microseconds to avoid needless second rollover overhead. Avoid calling microuptime the second time in mi_switch() if we do not pass through _idle in cpu_switch() This should reduce our context-switch overhead a bit, in particular on pre-P5 and SMP systems. WARNING: Programs which muck about with struct proc in userland will have to be fixed. Reviewed, but found imperfect by: bde
102 lines
3.4 KiB
C
102 lines
3.4 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.
|
|
*
|
|
* $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
|