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freebsd-dev/sys/i386/include/smp.h
Luoqi Chen 5206bca10a Enable vmspace sharing on SMP. Major changes are, 
- %fs register is added to trapframe and saved/restored upon kernel entry/exit.
- Per-cpu pages are no longer mapped at the same virtual address.
- Each cpu now has a separate gdt selector table. A new segment selector
  is added to point to per-cpu pages, per-cpu global variables are now
  accessed through this new selector (%fs). The selectors in gdt table are
  rearranged for cache line optimization.
- fask_vfork is now on as default for both UP and SMP.
- Some aio code cleanup.

Reviewed by:	Alan Cox	<alc@cs.rice.edu>
		John Dyson	<dyson@iquest.net>
		Julian Elischer	<julian@whistel.com>
		Bruce Evans	<bde@zeta.org.au>
		David Greenman	<dg@root.com>
1999-04-28 01:04:33 +00:00

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/*
* ----------------------------------------------------------------------------
* "THE BEER-WARE LICENSE" (Revision 42):
* <phk@FreeBSD.org> wrote this file. As long as you retain this notice you
* can do whatever you want with this stuff. If we meet some day, and you think
* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
* ----------------------------------------------------------------------------
*
* $Id: smp.h,v 1.44 1998/09/06 22:41:40 tegge Exp $
*
*/
#ifndef _MACHINE_SMP_H_
#define _MACHINE_SMP_H_
#ifdef KERNEL
#if defined(SMP) && !defined(APIC_IO)
# error APIC_IO required for SMP, add "options APIC_IO" to your config file.
#endif /* SMP && !APIC_IO */
/* Number of CPUs. */
#if defined(SMP) && !defined(NCPU)
# define NCPU 2
#endif /* SMP && NCPU */
/* Number of IO APICs. */
#if defined(APIC_IO) && !defined(NAPIC)
# define NAPIC 1
#endif /* SMP && NAPIC */
#if defined(SMP) || defined(APIC_IO)
#ifndef LOCORE
/*
* For sending values to POST displays.
* XXX FIXME: where does this really belong, isa.h/isa.c perhaps?
*/
extern int current_postcode; /** XXX currently in mp_machdep.c */
#define POSTCODE(X) current_postcode = (X), \
outb(0x80, current_postcode)
#define POSTCODE_LO(X) current_postcode &= 0xf0, \
current_postcode |= ((X) & 0x0f), \
outb(0x80, current_postcode)
#define POSTCODE_HI(X) current_postcode &= 0x0f, \
current_postcode |= (((X) << 4) & 0xf0), \
outb(0x80, current_postcode)
#include <machine/apic.h>
/* global data in mpboot.s */
extern int bootMP_size;
/* functions in mpboot.s */
void bootMP __P((void));
/* global data in mplock.s */
extern u_int mp_lock;
extern u_int isr_lock;
#ifdef RECURSIVE_MPINTRLOCK
extern u_int mpintr_lock;
#endif /* RECURSIVE_MPINTRLOCK */
/* functions in mplock.s */
void get_mplock __P((void));
void rel_mplock __P((void));
int try_mplock __P((void));
#ifdef RECURSIVE_MPINTRLOCK
void get_mpintrlock __P((void));
void rel_mpintrlock __P((void));
int try_mpintrlock __P((void));
#endif /* RECURSIVE_MPINTRLOCK */
/* global data in apic_vector.s */
extern volatile u_int stopped_cpus;
extern volatile u_int started_cpus;
extern volatile u_int checkstate_probed_cpus;
extern volatile u_int checkstate_need_ast;
extern volatile u_int resched_cpus;
extern void (*cpustop_restartfunc) __P((void));
/* functions in apic_ipl.s */
void apic_eoi __P((void));
u_int io_apic_read __P((int, int));
void io_apic_write __P((int, int, u_int));
/* global data in mp_machdep.c */
extern int bsp_apic_ready;
extern int mp_ncpus;
extern int mp_naps;
extern int mp_nbusses;
extern int mp_napics;
extern int mp_picmode;
extern int boot_cpu_id;
extern vm_offset_t cpu_apic_address;
extern vm_offset_t io_apic_address[];
extern u_int32_t cpu_apic_versions[];
extern u_int32_t io_apic_versions[];
extern int cpu_num_to_apic_id[];
extern int io_num_to_apic_id[];
extern int apic_id_to_logical[];
#define APIC_INTMAPSIZE 24
struct apic_intmapinfo {
int ioapic;
int int_pin;
volatile void *apic_address;
int redirindex;
};
extern struct apic_intmapinfo int_to_apicintpin[];
extern u_int all_cpus;
extern struct pcb stoppcbs[];
/* functions in mp_machdep.c */
u_int mp_bootaddress __P((u_int));
int mp_probe __P((void));
void mp_start __P((void));
void mp_announce __P((void));
u_int isa_apic_mask __P((u_int));
int isa_apic_irq __P((int));
int pci_apic_irq __P((int, int, int));
int apic_irq __P((int, int));
int next_apic_irq __P((int));
int undirect_isa_irq __P((int));
int undirect_pci_irq __P((int));
int apic_bus_type __P((int));
int apic_src_bus_id __P((int, int));
int apic_src_bus_irq __P((int, int));
int apic_int_type __P((int, int));
int apic_trigger __P((int, int));
int apic_polarity __P((int, int));
void bsp_apic_configure __P((void));
void init_secondary __P((void));
void smp_invltlb __P((void));
int stop_cpus __P((u_int));
int restart_cpus __P((u_int));
#ifdef BETTER_CLOCK
void forward_statclock __P((int pscnt));
void forward_hardclock __P((int pscnt));
#endif /* BETTER_CLOCK */
void forward_signal __P((struct proc *));
void forward_roundrobin __P((void));
#ifdef APIC_INTR_REORDER
void set_lapic_isrloc __P((int, int));
#endif /* APIC_INTR_REORDER */
/* global data in mpapic.c */
extern volatile lapic_t lapic;
extern volatile ioapic_t *ioapic[];
/* functions in mpapic.c */
void apic_dump __P((char*));
void apic_initialize __P((void));
void imen_dump __P((void));
int apic_ipi __P((int, int, int));
int selected_apic_ipi __P((u_int, int, int));
int io_apic_setup __P((int));
int ext_int_setup __P((int, int));
#if defined(READY)
void clr_io_apic_mask24 __P((int, u_int32_t));
void set_io_apic_mask24 __P((int, u_int32_t));
#endif /* READY */
void set_apic_timer __P((int));
int read_apic_timer __P((void));
void u_sleep __P((int));
/* global data in init_smp.c */
extern int invltlb_ok;
extern int smp_active;
extern volatile int smp_idle_loops;
#endif /* !LOCORE */
#endif /* SMP || APIC_IO */
#endif /* KERNEL */
#endif /* _MACHINE_SMP_H_ */
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