diff options
Diffstat (limited to 'freebsd-5.3-xen-sparse/i386-xen/include/pcpu.h')
| -rw-r--r-- | freebsd-5.3-xen-sparse/i386-xen/include/pcpu.h | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/freebsd-5.3-xen-sparse/i386-xen/include/pcpu.h b/freebsd-5.3-xen-sparse/i386-xen/include/pcpu.h new file mode 100644 index 0000000000..80a675cd4a --- /dev/null +++ b/freebsd-5.3-xen-sparse/i386-xen/include/pcpu.h @@ -0,0 +1,173 @@ +/*- + * Copyright (c) Peter Wemm <peter@netplex.com.au> + * 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: src/sys/i386/include/pcpu.h,v 1.41 2003/11/20 23:23:22 peter Exp $ + */ + +#ifndef _MACHINE_PCPU_H_ +#define _MACHINE_PCPU_H_ + +#ifdef _KERNEL + +#include <machine/segments.h> +#include <machine/tss.h> + +/* + * The SMP parts are setup in pmap.c and locore.s for the BSP, and + * mp_machdep.c sets up the data for the AP's to "see" when they awake. + * The reason for doing it via a struct is so that an array of pointers + * to each CPU's data can be set up for things like "check curproc on all + * other processors" + */ +#define PCPU_MD_FIELDS \ + struct pcpu *pc_prvspace; /* Self-reference */ \ + struct pmap *pc_curpmap; \ + struct i386tss pc_common_tss; \ + struct segment_descriptor pc_common_tssd; \ + struct segment_descriptor *pc_tss_gdt; \ + int pc_currentldt; \ + u_int pc_acpi_id; \ + u_int pc_apic_id; \ + u_int pc_faultaddr; \ + u_int pc_trap_nesting; \ + u_int pc_pdir + +#if defined(lint) + +extern struct pcpu *pcpup; + +#define PCPU_GET(member) (pcpup->pc_ ## member) +#define PCPU_PTR(member) (&pcpup->pc_ ## member) +#define PCPU_SET(member,value) (pcpup->pc_ ## member = (value)) + +#elif defined(__GNUC__) + +/* + * Evaluates to the byte offset of the per-cpu variable name. + */ +#define __pcpu_offset(name) \ + __offsetof(struct pcpu, name) + +/* + * Evaluates to the type of the per-cpu variable name. + */ +#define __pcpu_type(name) \ + __typeof(((struct pcpu *)0)->name) + +/* + * Evaluates to the address of the per-cpu variable name. + */ +#define __PCPU_PTR(name) __extension__ ({ \ + __pcpu_type(name) *__p; \ + \ + __asm __volatile("movl %%fs:%1,%0; addl %2,%0" \ + : "=r" (__p) \ + : "m" (*(struct pcpu *)(__pcpu_offset(pc_prvspace))), \ + "i" (__pcpu_offset(name))); \ + \ + __p; \ +}) + +/* + * Evaluates to the value of the per-cpu variable name. + */ +#define __PCPU_GET(name) __extension__ ({ \ + __pcpu_type(name) __result; \ + \ + if (sizeof(__result) == 1) { \ + u_char __b; \ + __asm __volatile("movb %%fs:%1,%0" \ + : "=r" (__b) \ + : "m" (*(u_char *)(__pcpu_offset(name)))); \ + __result = *(__pcpu_type(name) *)(void *)&__b; \ + } else if (sizeof(__result) == 2) { \ + u_short __w; \ + __asm __volatile("movw %%fs:%1,%0" \ + : "=r" (__w) \ + : "m" (*(u_short *)(__pcpu_offset(name)))); \ + __result = *(__pcpu_type(name) *)(void *)&__w; \ + } else if (sizeof(__result) == 4) { \ + u_int __i; \ + __asm __volatile("movl %%fs:%1,%0" \ + : "=r" (__i) \ + : "m" (*(u_int *)(__pcpu_offset(name)))); \ + __result = *(__pcpu_type(name) *)(void *)&__i; \ + } else { \ + __result = *__PCPU_PTR(name); \ + } \ + \ + __result; \ +}) + +/* + * Sets the value of the per-cpu variable name to value val. + */ +#define __PCPU_SET(name, val) { \ + __pcpu_type(name) __val = (val); \ + \ + if (sizeof(__val) == 1) { \ + u_char __b; \ + __b = *(u_char *)&__val; \ + __asm __volatile("movb %1,%%fs:%0" \ + : "=m" (*(u_char *)(__pcpu_offset(name))) \ + : "r" (__b)); \ + } else if (sizeof(__val) == 2) { \ + u_short __w; \ + __w = *(u_short *)&__val; \ + __asm __volatile("movw %1,%%fs:%0" \ + : "=m" (*(u_short *)(__pcpu_offset(name))) \ + : "r" (__w)); \ + } else if (sizeof(__val) == 4) { \ + u_int __i; \ + __i = *(u_int *)&__val; \ + __asm __volatile("movl %1,%%fs:%0" \ + : "=m" (*(u_int *)(__pcpu_offset(name))) \ + : "r" (__i)); \ + } else { \ + *__PCPU_PTR(name) = __val; \ + } \ +} + +#define PCPU_GET(member) __PCPU_GET(pc_ ## member) +#define PCPU_PTR(member) __PCPU_PTR(pc_ ## member) +#define PCPU_SET(member, val) __PCPU_SET(pc_ ## member, val) + +static __inline struct thread * +__curthread(void) +{ + struct thread *td; + + __asm __volatile("movl %%fs:0,%0" : "=r" (td)); + return (td); +} +#define curthread (__curthread()) + +#else +#error gcc or lint is required to use this file +#endif + +#endif /* _KERNEL */ + +#endif /* ! _MACHINE_PCPU_H_ */ |