diff options
Diffstat (limited to 'sys/i386/include/globals.h')
| -rw-r--r-- | sys/i386/include/globals.h | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/sys/i386/include/globals.h b/sys/i386/include/globals.h new file mode 100644 index 0000000..5a770f1 --- /dev/null +++ b/sys/i386/include/globals.h @@ -0,0 +1,147 @@ +/*- + * 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. + * + * $Id$ + */ + +#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) + +#ifdef VM86 +#define common_tssd GLOBAL_LVALUE(common_tssd, struct segment_descriptor) +#endif + +#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(curpcb) +GLOBAL_FUNC(npxproc) +GLOBAL_FUNC(common_tss) +GLOBAL_FUNC(switchtime) +GLOBAL_FUNC(switchticks) + +#ifdef VM86 +GLOBAL_FUNC(common_tssd) +#endif + +#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_ */ |
