146 lines
4.0 KiB
C
146 lines
4.0 KiB
C
/*-
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* Copyright (C) 2003 David Xu <davidxu@freebsd.org>
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* Copyright (c) 2001 Daniel Eischen <deischen@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. Neither the name of the author nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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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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/*
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* $FreeBSD$
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*/
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#ifndef _KSD_H_
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#define _KSD_H_
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#include <sys/types.h>
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struct pthread;
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struct __ucontext;
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struct kse;
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/*
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* KSE Specific Data.
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*/
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struct ksd {
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int ldt;
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#define KSDF_INITIALIZED 0x01
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long flags;
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void *base;
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long size;
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};
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/*
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* Evaluates to the byte offset of the per-kse variable name.
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*/
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#define __ksd_offset(name) __offsetof(struct kse, name)
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/*
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* Evaluates to the type of the per-kse variable name.
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*/
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#define __ksd_type(name) __typeof(((struct kse *)0)->name)
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/*
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* Evaluates to the value of the per-kse variable name.
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*/
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#define __KSD_GET_PTR(name) ({ \
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void *__result; \
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\
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u_int __i; \
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__asm __volatile("movl %%gs:%1, %0" \
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: "=r" (__i) \
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: "m" (*(u_int *)(__ksd_offset(name)))); \
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__result = (void *)__i; \
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\
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__result; \
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})
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/*
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* Evaluates to the value of the per-kse variable name.
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*/
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#define __KSD_GET32(name) ({ \
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__ksd_type(name) __result; \
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\
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u_int __i; \
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__asm __volatile("movl %%gs:%1, %0" \
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: "=r" (__i) \
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: "m" (*(u_int *)(__ksd_offset(name)))); \
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__result = *(__ksd_type(name) *)&__i; \
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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 __KSD_SET32(name, val) ({ \
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__ksd_type(name) __val = (val); \
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\
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u_int __i; \
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__i = *(u_int *)&__val; \
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__asm __volatile("movl %1,%%gs:%0" \
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: "=m" (*(u_int *)(__ksd_offset(name))) \
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: "r" (__i)); \
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})
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static __inline u_long
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__ksd_readandclear32(volatile u_long *addr)
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{
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u_long result;
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__asm __volatile (
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" xorl %0, %0;"
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" xchgl %%gs:%1, %0;"
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"# __ksd_readandclear32"
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: "=&r" (result)
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: "m" (*addr));
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return (result);
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}
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#define __KSD_READANDCLEAR32(name) ({ \
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__ksd_type(name) __result; \
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\
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__result = (__ksd_type(name)) \
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__ksd_readandclear32((u_long *)__ksd_offset(name)); \
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__result; \
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})
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/*
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* All members of struct kse are prefixed with k_.
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*/
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#define KSD_GET_PTR(member) __KSD_GET_PTR(k_ ## member)
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#define KSD_SET_PTR(member, val) __KSD_SET32(k_ ## member, val)
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#define KSD_READANDCLEAR_PTR(member) __KSD_READANDCLEAR32(k_ ## member)
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#define _ksd_curkse ((struct kse *)KSD_GET_PTR(mbx.km_udata))
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#define _ksd_curthread KSD_GET_PTR(curthread)
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#define _ksd_set_tmbx(value) KSD_SET_PTR(mbx.km_curthread, (void *)value)
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#define _ksd_get_tmbx(value) KSD_GET_PTR(mbx.km_curthread)
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#define _ksd_readandclear_tmbx KSD_READANDCLEAR_PTR(mbx.km_curthread)
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int _ksd_create(struct ksd *ksd, void *base, int size);
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void _ksd_destroy(struct ksd *ksd);
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int _ksd_getprivate(struct ksd *ksd, void **base, int *size);
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int _ksd_setprivate(struct ksd *ksd);
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#endif
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