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/*-
* 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.
*
* $FreeBSD$
*/
#ifndef _MACHINE_GLOBALS_H_
#define _MACHINE_GLOBALS_H_
#ifdef _KERNEL
#define GLOBAL_LVALUE(name, type) \
(*(type *)_global_ptr_##name())
#define GLOBAL_RVALUE(name, type) \
((type)_global_##name())
/* non-volatile version */
#define GLOBAL_LVALUE_NV(name, type) \
(*(type *)_global_ptr_##name##_nv())
#define GLOBAL_RVALUE_NV(name, type) \
((type)_global_##name##_nv())
#define GLOBAL_FUNC(name) \
static __inline void *_global_ptr_##name(void) { \
void *val; \
__asm __volatile("movl $gd_" #name ",%0;" \
"addl %%fs:globaldata,%0" : "=r" (val)); \
return (val); \
} \
static __inline void *_global_ptr_##name##_nv(void) { \
void *val; \
__asm("movl $gd_" #name ",%0;" \
"addl %%fs:globaldata,%0" : "=r" (val)); \
return (val); \
} \
static __inline int _global_##name(void) { \
int val; \
__asm __volatile("movl %%fs:gd_" #name ",%0" : "=r" (val)); \
return (val); \
} \
static __inline int _global_##name##_nv(void) { \
int val; \
__asm("movl %%fs:gd_" #name ",%0" : "=r" (val)); \
return (val); \
} \
static __inline void _global_##name##_set(int val) { \
__asm __volatile("movl %0,%%fs:gd_" #name : : "r" (val)); \
} \
static __inline void _global_##name##_set_nv(int val) { \
__asm("movl %0,%%fs:gd_" #name : : "r" (val)); \
}
#if defined(SMP) || defined(KLD_MODULE) || defined(ACTUALLY_LKM_NOT_KERNEL)
/*
* The following set of macros works for UP kernel as well, but for maximum
* performance we allow the global variables to be accessed directly. On the
* other hand, kernel modules should always use these macros to maintain
* portability between UP and SMP kernels.
*/
#define curproc GLOBAL_RVALUE_NV(curproc, struct proc *)
#define curpcb GLOBAL_RVALUE_NV(curpcb, struct pcb *)
#define npxproc GLOBAL_LVALUE(npxproc, struct proc *)
#define common_tss GLOBAL_LVALUE(common_tss, struct i386tss)
#define switchtime GLOBAL_LVALUE(switchtime, struct timeval)
#define switchticks GLOBAL_LVALUE(switchticks, int)
#define common_tssd GLOBAL_LVALUE(common_tssd, struct segment_descriptor)
#define tss_gdt GLOBAL_LVALUE(tss_gdt, struct segment_descriptor *)
#define astpending GLOBAL_LVALUE(astpending, u_int)
#ifdef USER_LDT
#define currentldt GLOBAL_LVALUE(currentldt, int)
#endif
#ifdef SMP
#define cpuid GLOBAL_RVALUE(cpuid, u_int)
#define other_cpus GLOBAL_LVALUE(other_cpus, u_int)
#define inside_intr GLOBAL_LVALUE(inside_intr, int)
#define prv_CMAP1 GLOBAL_LVALUE(prv_CMAP1, pt_entry_t *)
#define prv_CMAP2 GLOBAL_LVALUE(prv_CMAP2, pt_entry_t *)
#define prv_CMAP3 GLOBAL_LVALUE(prv_CMAP3, pt_entry_t *)
#define prv_PMAP1 GLOBAL_LVALUE(prv_PMAP1, pt_entry_t *)
#define prv_CADDR1 GLOBAL_RVALUE(prv_CADDR1, caddr_t)
#define prv_CADDR2 GLOBAL_RVALUE(prv_CADDR2, caddr_t)
#define prv_CADDR3 GLOBAL_RVALUE(prv_CADDR3, caddr_t)
#define prv_PADDR1 GLOBAL_RVALUE(prv_PADDR1, unsigned *)
#endif
#endif /*UP kernel*/
GLOBAL_FUNC(curproc)
GLOBAL_FUNC(astpending)
GLOBAL_FUNC(curpcb)
GLOBAL_FUNC(npxproc)
GLOBAL_FUNC(common_tss)
GLOBAL_FUNC(switchtime)
GLOBAL_FUNC(switchticks)
GLOBAL_FUNC(common_tssd)
GLOBAL_FUNC(tss_gdt)
#ifdef USER_LDT
GLOBAL_FUNC(currentldt)
#endif
#ifdef SMP
GLOBAL_FUNC(cpuid)
GLOBAL_FUNC(other_cpus)
GLOBAL_FUNC(inside_intr)
GLOBAL_FUNC(prv_CMAP1)
GLOBAL_FUNC(prv_CMAP2)
GLOBAL_FUNC(prv_CMAP3)
GLOBAL_FUNC(prv_PMAP1)
GLOBAL_FUNC(prv_CADDR1)
GLOBAL_FUNC(prv_CADDR2)
GLOBAL_FUNC(prv_CADDR3)
GLOBAL_FUNC(prv_PADDR1)
#endif
#define SET_CURPROC(x) (_global_curproc_set_nv((int)x))
#endif /* _KERNEL */
#endif /* !_MACHINE_GLOBALS_H_ */
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