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b40ce4165d
Note ALL MODULES MUST BE RECOMPILED make the kernel aware that there are smaller units of scheduling than the process. (but only allow one thread per process at this time). This is functionally equivalent to teh previousl -current except that there is a thread associated with each process. Sorry john! (your next MFC will be a doosie!) Reviewed by: peter@freebsd.org, dillon@freebsd.org X-MFC after: ha ha ha ha
142 lines
4.4 KiB
C
142 lines
4.4 KiB
C
/*-
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* Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org>
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* All rights reserved.
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* Copyright (c) 2000 Jake Burkholder <jake@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_GLOBALS_H_
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#define _MACHINE_GLOBALS_H_
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#ifdef _KERNEL
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#include <machine/globaldata.h>
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#ifndef __GNUC__
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#error gcc is required to use this file
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#endif
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/*
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* Evaluates to the byte offset of the per-cpu variable name.
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*/
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#define __pcpu_offset(name) \
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__offsetof(struct globaldata, name)
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/*
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* Evaluates to the type of the per-cpu variable name.
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*/
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#define __pcpu_type(name) \
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__typeof(((struct globaldata *)0)->name)
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/*
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* Evaluates to the address of the per-cpu variable name.
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*/
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#define __PCPU_PTR(name) ({ \
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__pcpu_type(name) *__p; \
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\
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__asm __volatile("movl %%fs:%1,%0; addl %2,%0" \
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: "=r" (__p) \
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: "m" (*(struct globaldata *)(__pcpu_offset(gd_prvspace))), \
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"i" (__pcpu_offset(name))); \
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\
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__p; \
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})
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/*
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* Evaluates to the value of the per-cpu variable name.
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*/
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#define __PCPU_GET(name) ({ \
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__pcpu_type(name) __result; \
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\
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if (sizeof(__result) == 1) { \
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u_char __b; \
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__asm __volatile("movb %%fs:%1,%0" \
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: "=r" (__b) \
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: "m" (*(u_char *)(__pcpu_offset(name)))); \
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__result = *(__pcpu_type(name) *)&__b; \
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} else if (sizeof(__result) == 2) { \
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u_short __w; \
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__asm __volatile("movw %%fs:%1,%0" \
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: "=r" (__w) \
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: "m" (*(u_short *)(__pcpu_offset(name)))); \
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__result = *(__pcpu_type(name) *)&__w; \
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} else if (sizeof(__result) == 4) { \
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u_int __i; \
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__asm __volatile("movl %%fs:%1,%0" \
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: "=r" (__i) \
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: "m" (*(u_int *)(__pcpu_offset(name)))); \
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__result = *(__pcpu_type(name) *)&__i; \
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} else { \
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__result = *__PCPU_PTR(name); \
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} \
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\
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__result; \
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})
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/*
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* Sets the value of the per-cpu variable name to value val.
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*/
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#define __PCPU_SET(name, val) ({ \
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__pcpu_type(name) __val = (val); \
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\
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if (sizeof(__val) == 1) { \
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u_char __b; \
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__b = *(u_char *)&__val; \
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__asm __volatile("movb %1,%%fs:%0" \
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: "=m" (*(u_char *)(__pcpu_offset(name))) \
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: "r" (__b)); \
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} else if (sizeof(__val) == 2) { \
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u_short __w; \
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__w = *(u_short *)&__val; \
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__asm __volatile("movw %1,%%fs:%0" \
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: "=m" (*(u_short *)(__pcpu_offset(name))) \
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: "r" (__w)); \
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} else if (sizeof(__val) == 4) { \
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u_int __i; \
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__i = *(u_int *)&__val; \
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__asm __volatile("movl %1,%%fs:%0" \
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: "=m" (*(u_int *)(__pcpu_offset(name))) \
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: "r" (__i)); \
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} else { \
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*__PCPU_PTR(name) = __val; \
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} \
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})
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#define PCPU_GET(member) __PCPU_GET(gd_ ## member)
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#define PCPU_PTR(member) __PCPU_PTR(gd_ ## member)
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#define PCPU_SET(member, val) __PCPU_SET(gd_ ## member, val)
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#define GLOBALDATA PCPU_GET(prvspace)
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#define curthread PCPU_GET(curthread)
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#define CURPROC (curthread->td_proc)
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#define curproc (curthread->td_proc)
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#define curksegrp (curthread->td_ksegrp)
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#define curkse (curthread->td_kse)
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#endif /* _KERNEL */
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#endif /* !_MACHINE_GLOBALS_H_ */
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