664a31e496
is an application space macro and the applications are supposed to be free to use it as they please (but cannot). This is consistant with the other BSD's who made this change quite some time ago. More commits to come.
146 lines
4.7 KiB
C
146 lines
4.7 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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*
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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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#define GLOBAL_LVALUE(name, type) \
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(*(type *)_global_ptr_##name())
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#define GLOBAL_RVALUE(name, type) \
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((type)_global_##name())
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/* non-volatile version */
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#define GLOBAL_LVALUE_NV(name, type) \
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(*(type *)_global_ptr_##name##_nv())
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#define GLOBAL_RVALUE_NV(name, type) \
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((type)_global_##name##_nv())
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#define GLOBAL_FUNC(name) \
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static __inline void *_global_ptr_##name(void) { \
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void *val; \
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__asm __volatile("movl $gd_" #name ",%0;" \
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"addl %%fs:globaldata,%0" : "=r" (val)); \
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return (val); \
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} \
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static __inline void *_global_ptr_##name##_nv(void) { \
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void *val; \
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__asm("movl $gd_" #name ",%0;" \
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"addl %%fs:globaldata,%0" : "=r" (val)); \
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return (val); \
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} \
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static __inline int _global_##name(void) { \
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int val; \
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__asm __volatile("movl %%fs:gd_" #name ",%0" : "=r" (val)); \
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return (val); \
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} \
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static __inline int _global_##name##_nv(void) { \
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int val; \
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__asm("movl %%fs:gd_" #name ",%0" : "=r" (val)); \
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return (val); \
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} \
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static __inline void _global_##name##_set(int val) { \
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__asm __volatile("movl %0,%%fs:gd_" #name : : "r" (val)); \
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} \
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static __inline void _global_##name##_set_nv(int val) { \
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__asm("movl %0,%%fs:gd_" #name : : "r" (val)); \
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}
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#if defined(SMP) || defined(KLD_MODULE) || defined(ACTUALLY_LKM_NOT_KERNEL)
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/*
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* The following set of macros works for UP kernel as well, but for maximum
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* performance we allow the global variables to be accessed directly. On the
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* other hand, kernel modules should always use these macros to maintain
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* portability between UP and SMP kernels.
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*/
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#define curproc GLOBAL_RVALUE_NV(curproc, struct proc *)
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#define curpcb GLOBAL_RVALUE_NV(curpcb, struct pcb *)
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#define npxproc GLOBAL_LVALUE(npxproc, struct proc *)
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#define common_tss GLOBAL_LVALUE(common_tss, struct i386tss)
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#define switchtime GLOBAL_LVALUE(switchtime, struct timeval)
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#define switchticks GLOBAL_LVALUE(switchticks, int)
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#define common_tssd GLOBAL_LVALUE(common_tssd, struct segment_descriptor)
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#define tss_gdt GLOBAL_LVALUE(tss_gdt, struct segment_descriptor *)
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#ifdef USER_LDT
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#define currentldt GLOBAL_LVALUE(currentldt, int)
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#endif
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#ifdef SMP
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#define cpuid GLOBAL_RVALUE(cpuid, u_int)
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#define other_cpus GLOBAL_LVALUE(other_cpus, u_int)
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#define inside_intr GLOBAL_LVALUE(inside_intr, int)
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#define prv_CMAP1 GLOBAL_LVALUE(prv_CMAP1, pt_entry_t *)
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#define prv_CMAP2 GLOBAL_LVALUE(prv_CMAP2, pt_entry_t *)
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#define prv_CMAP3 GLOBAL_LVALUE(prv_CMAP3, pt_entry_t *)
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#define prv_PMAP1 GLOBAL_LVALUE(prv_PMAP1, pt_entry_t *)
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#define prv_CADDR1 GLOBAL_RVALUE(prv_CADDR1, caddr_t)
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#define prv_CADDR2 GLOBAL_RVALUE(prv_CADDR2, caddr_t)
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#define prv_CADDR3 GLOBAL_RVALUE(prv_CADDR3, caddr_t)
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#define prv_PADDR1 GLOBAL_RVALUE(prv_PADDR1, unsigned *)
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#endif
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#endif /*UP kernel*/
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GLOBAL_FUNC(curproc)
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GLOBAL_FUNC(curpcb)
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GLOBAL_FUNC(npxproc)
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GLOBAL_FUNC(common_tss)
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GLOBAL_FUNC(switchtime)
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GLOBAL_FUNC(switchticks)
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GLOBAL_FUNC(common_tssd)
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GLOBAL_FUNC(tss_gdt)
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#ifdef USER_LDT
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GLOBAL_FUNC(currentldt)
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#endif
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#ifdef SMP
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GLOBAL_FUNC(cpuid)
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GLOBAL_FUNC(other_cpus)
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GLOBAL_FUNC(inside_intr)
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GLOBAL_FUNC(prv_CMAP1)
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GLOBAL_FUNC(prv_CMAP2)
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GLOBAL_FUNC(prv_CMAP3)
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GLOBAL_FUNC(prv_PMAP1)
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GLOBAL_FUNC(prv_CADDR1)
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GLOBAL_FUNC(prv_CADDR2)
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GLOBAL_FUNC(prv_CADDR3)
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GLOBAL_FUNC(prv_PADDR1)
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#endif
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#define SET_CURPROC(x) (_global_curproc_set_nv((int)x))
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#endif /* _KERNEL */
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#endif /* !_MACHINE_GLOBALS_H_ */
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