freebsd-dev/sys/sparc64/include/pcpu.h
Thomas Moestl 3e519a2cf4 Move the per-CPU vmspace pointer fixup that is required before a
struct vmspace is freed from cpu_sched_exit() to pmap_release().

This has the advantage of being able to rely on MI code to decide
when a free should occur, instead of having to inspect the reference
count ourselves.

At the same time, turn the per-CPU vmspace pointer into a pmap pointer,
so that pmap_release() can deal with pmaps exclusively.

Reviewed (and embrassing bug spotted) by: jake
2004-05-26 12:06:52 +00:00

73 lines
2.4 KiB
C

/*-
* Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org>
* 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.
*
* from: FreeBSD: src/sys/i386/include/globaldata.h,v 1.27 2001/04/27
* $FreeBSD$
*/
#ifndef _MACHINE_PCPU_H_
#define _MACHINE_PCPU_H_
#ifdef _KERNEL
#include <machine/asmacros.h>
#include <machine/frame.h>
#include <machine/intr_machdep.h>
#define ALT_STACK_SIZE 128
struct pmap;
/*
* Inside the kernel, the globally reserved register g7 is used to
* point at the globaldata structure.
*/
#define PCPU_MD_FIELDS \
struct intr_request pc_irpool[IR_FREE]; \
struct intr_request *pc_irhead; \
struct intr_request **pc_irtail; \
struct intr_request *pc_irfree; \
struct pmap *pc_pmap; \
vm_offset_t pc_addr; \
u_int pc_mid; \
u_int pc_node; \
u_int pc_tlb_ctx; \
u_int pc_tlb_ctx_max; \
u_int pc_tlb_ctx_min
struct pcb;
struct pcpu;
register struct pcb *curpcb __asm__(__XSTRING(PCB_REG));
register struct pcpu *pcpup __asm__(__XSTRING(PCPU_REG));
#define PCPU_GET(member) (pcpup->pc_ ## member)
#define PCPU_PTR(member) (&pcpup->pc_ ## member)
#define PCPU_SET(member,value) (pcpup->pc_ ## member = (value))
#endif /* _KERNEL */
#endif /* !_MACHINE_PCPU_H_ */