435 lines
12 KiB
C
435 lines
12 KiB
C
/*-
|
|
* Copyright (c) 1993 The Regents of the University of California.
|
|
* 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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: cpufunc.h,v 1.33 1995/02/16 13:21:47 bde Exp $
|
|
*/
|
|
|
|
/*
|
|
* Functions to provide access to special i386 instructions.
|
|
*/
|
|
|
|
#ifndef _MACHINE_CPUFUNC_H_
|
|
#define _MACHINE_CPUFUNC_H_
|
|
|
|
#include <sys/cdefs.h>
|
|
#include <sys/types.h>
|
|
|
|
#include <machine/spl.h> /* XXX belongs elsewhere */
|
|
|
|
#ifdef __GNUC__
|
|
|
|
#ifdef BDE_DEBUGGER
|
|
extern int bdb_exists;
|
|
|
|
static __inline int
|
|
bdb(void)
|
|
{
|
|
if (!bdb_exists)
|
|
return (0);
|
|
__asm __volatile("int $3");
|
|
return (1);
|
|
}
|
|
#endif /* BDE_DEBUGGER */
|
|
|
|
static __inline void
|
|
disable_intr(void)
|
|
{
|
|
__asm __volatile("cli");
|
|
}
|
|
|
|
static __inline void
|
|
enable_intr(void)
|
|
{
|
|
__asm __volatile("sti");
|
|
}
|
|
|
|
#define HAVE_INLINE_FFS
|
|
|
|
static __inline int
|
|
ffs(int mask)
|
|
{
|
|
int result;
|
|
/*
|
|
* bsfl turns out to be not all that slow on 486's. It can beaten
|
|
* using a binary search to reduce to 4 bits and then a table lookup,
|
|
* but only if the code is inlined and in the cache, and the code
|
|
* is quite large so inlining it probably busts the cache.
|
|
*
|
|
* Note that gcc-2's builtin ffs would be used if we didn't declare
|
|
* this inline or turn off the builtin. The builtin is faster but
|
|
* broken in gcc-2.4.5 and slower but working in gcc-2.5 and 2.6.
|
|
*/
|
|
__asm __volatile("testl %0,%0; je 1f; bsfl %0,%0; incl %0; 1:"
|
|
: "=r" (result) : "0" (mask));
|
|
return (result);
|
|
}
|
|
|
|
#if __GNUC__ < 2
|
|
|
|
#define inb(port) inbv(port)
|
|
#define outb(port, data) outbv(port, data)
|
|
|
|
#else /* __GNUC >= 2 */
|
|
|
|
/*
|
|
* Use an expression-statement instead of a conditional expression
|
|
* because gcc-2.6.0 would promote the operands of the conditional
|
|
* and produce poor code for "if ((inb(var) & const1) == const2)".
|
|
*/
|
|
#define inb(port) ({ \
|
|
u_char _data; \
|
|
if (__builtin_constant_p((int) (port)) && (port) < 256ul) \
|
|
_data = inbc(port); \
|
|
else \
|
|
_data = inbv(port); \
|
|
_data; })
|
|
|
|
#define outb(port, data) \
|
|
(__builtin_constant_p((int) (port)) && (port) < 256ul \
|
|
? outbc(port, data) : outbv(port, data))
|
|
|
|
static __inline u_char
|
|
inbc(u_int port)
|
|
{
|
|
u_char data;
|
|
|
|
__asm __volatile("inb %1,%0" : "=a" (data) : "i" (port));
|
|
return (data);
|
|
}
|
|
|
|
static __inline void
|
|
outbc(u_int port, u_char data)
|
|
{
|
|
__asm __volatile("outb %0,%1" : : "a" (data), "i" (port));
|
|
}
|
|
|
|
#endif /* __GNUC <= 2 */
|
|
|
|
static __inline u_char
|
|
inbv(u_int port)
|
|
{
|
|
u_char data;
|
|
/*
|
|
* We use %%dx and not %1 here because i/o is done at %dx and not at
|
|
* %edx, while gcc generates inferior code (movw instead of movl)
|
|
* if we tell it to load (u_short) port.
|
|
*/
|
|
__asm __volatile("inb %%dx,%0" : "=a" (data) : "d" (port));
|
|
return (data);
|
|
}
|
|
|
|
static __inline u_long
|
|
inl(u_int port)
|
|
{
|
|
u_long data;
|
|
|
|
__asm __volatile("inl %%dx,%0" : "=a" (data) : "d" (port));
|
|
return (data);
|
|
}
|
|
|
|
static __inline void
|
|
insb(u_int port, void *addr, size_t cnt)
|
|
{
|
|
__asm __volatile("cld; rep; insb"
|
|
: : "d" (port), "D" (addr), "c" (cnt)
|
|
: "di", "cx", "memory");
|
|
}
|
|
|
|
static __inline void
|
|
insw(u_int port, void *addr, size_t cnt)
|
|
{
|
|
__asm __volatile("cld; rep; insw"
|
|
: : "d" (port), "D" (addr), "c" (cnt)
|
|
: "di", "cx", "memory");
|
|
}
|
|
|
|
static __inline void
|
|
insl(u_int port, void *addr, size_t cnt)
|
|
{
|
|
__asm __volatile("cld; rep; insl"
|
|
: : "d" (port), "D" (addr), "c" (cnt)
|
|
: "di", "cx", "memory");
|
|
}
|
|
|
|
static __inline u_short
|
|
inw(u_int port)
|
|
{
|
|
u_short data;
|
|
|
|
__asm __volatile("inw %%dx,%0" : "=a" (data) : "d" (port));
|
|
return (data);
|
|
}
|
|
|
|
static __inline void
|
|
outbv(u_int port, u_char data)
|
|
{
|
|
u_char al;
|
|
/*
|
|
* Use an unnecessary assignment to help gcc's register allocator.
|
|
* This make a large difference for gcc-1.40 and a tiny difference
|
|
* for gcc-2.6.0. For gcc-1.40, al had to be ``asm("ax")'' for
|
|
* best results. gcc-2.6.0 can't handle this.
|
|
*/
|
|
al = data;
|
|
__asm __volatile("outb %0,%%dx" : : "a" (al), "d" (port));
|
|
}
|
|
|
|
static __inline void
|
|
outl(u_int port, u_long data)
|
|
{
|
|
/*
|
|
* outl() and outw() aren't used much so we haven't looked at
|
|
* possible micro-optimizations such as the unnecessary
|
|
* assignment for them.
|
|
*/
|
|
__asm __volatile("outl %0,%%dx" : : "a" (data), "d" (port));
|
|
}
|
|
|
|
static __inline void
|
|
outsb(u_int port, void *addr, size_t cnt)
|
|
{
|
|
__asm __volatile("cld; rep; outsb"
|
|
: : "d" (port), "S" (addr), "c" (cnt)
|
|
: "si", "cx");
|
|
}
|
|
|
|
static __inline void
|
|
outsw(u_int port, void *addr, size_t cnt)
|
|
{
|
|
__asm __volatile("cld; rep; outsw"
|
|
: : "d" (port), "S" (addr), "c" (cnt)
|
|
: "si", "cx");
|
|
}
|
|
|
|
static __inline void
|
|
outsl(u_int port, void *addr, size_t cnt)
|
|
{
|
|
__asm __volatile("cld; rep; outsl"
|
|
: : "d" (port), "S" (addr), "c" (cnt)
|
|
: "si", "cx");
|
|
}
|
|
|
|
static __inline void
|
|
outw(u_int port, u_short data)
|
|
{
|
|
__asm __volatile("outw %0,%%dx" : : "a" (data), "d" (port));
|
|
}
|
|
|
|
static __inline void
|
|
pmap_update(void)
|
|
{
|
|
u_long temp;
|
|
/*
|
|
* This should be implemented as load_cr3(rcr3()) when load_cr3()
|
|
* is inlined.
|
|
*/
|
|
__asm __volatile("movl %%cr3, %0; movl %0, %%cr3" : "=r" (temp));
|
|
}
|
|
|
|
static __inline u_long
|
|
rcr2(void)
|
|
{
|
|
u_long data;
|
|
|
|
__asm __volatile("movl %%cr2,%0" : "=r" (data));
|
|
return (data);
|
|
}
|
|
|
|
static __inline u_long
|
|
read_eflags(void)
|
|
{
|
|
u_long ef;
|
|
|
|
__asm __volatile("pushfl; popl %0" : "=r" (ef));
|
|
return (ef);
|
|
}
|
|
|
|
static __inline void
|
|
write_eflags(u_long ef)
|
|
{
|
|
__asm __volatile("pushl %0; popfl" : : "r" (ef));
|
|
}
|
|
|
|
/*
|
|
* XXX queue stuff belongs elsewhere.
|
|
*/
|
|
struct quehead {
|
|
struct quehead *qh_link;
|
|
struct quehead *qh_rlink;
|
|
};
|
|
|
|
static __inline void
|
|
insque(void *a, void *b)
|
|
{
|
|
struct quehead *element = a, *head = b;
|
|
|
|
element->qh_link = head->qh_link;
|
|
element->qh_rlink = head;
|
|
head->qh_link = element;
|
|
element->qh_link->qh_rlink = element;
|
|
}
|
|
|
|
static __inline void
|
|
remque(void *a)
|
|
{
|
|
struct quehead *element = a;
|
|
|
|
element->qh_link->qh_rlink = element->qh_rlink;
|
|
element->qh_rlink->qh_link = element->qh_link;
|
|
element->qh_rlink = 0;
|
|
}
|
|
|
|
#else /* !__GNUC__ */
|
|
|
|
int bdb __P((void));
|
|
void disable_intr __P((void));
|
|
void enable_intr __P((void));
|
|
u_char inb __P((u_int port));
|
|
u_long inl __P((u_int port));
|
|
void insb __P((u_int port, void *addr, size_t cnt));
|
|
void insl __P((u_int port, void *addr, size_t cnt));
|
|
void insw __P((u_int port, void *addr, size_t cnt));
|
|
u_short inw __P((u_int port));
|
|
void outb __P((u_int port, u_char data));
|
|
void outl __P((u_int port, u_long data));
|
|
void outsb __P((u_int port, void *addr, size_t cnt));
|
|
void outsl __P((u_int port, void *addr, size_t cnt));
|
|
void outsw __P((u_int port, void *addr, size_t cnt));
|
|
void outw __P((u_int port, u_short data));
|
|
void pmap_update __P((void));
|
|
u_long read_eflags __P((void));
|
|
u_long rcr2 __P((void));
|
|
void write_eflags __P((u_long ef));
|
|
|
|
void insque __P((void *a, void *b));
|
|
void remque __P((void *a));
|
|
|
|
#endif /* __GNUC__ */
|
|
|
|
/*
|
|
* XXX the following declarations document garbage in support.s.
|
|
* gcc hasn't needed _divsi* for years.
|
|
* bcopy[bwx]() was used by pccons but isn't used now.
|
|
*/
|
|
int __divsi3 __P((int factor1, int factor2));
|
|
u_int __udivsi3 __P((u_int factor1, u_int factor2));
|
|
void bcopyb __P((const void *from, void *to, size_t len));
|
|
void bcopyw __P((const void *from, void *to, size_t len));
|
|
void bcopyx __P((const void *from, void *to, size_t len,
|
|
int stride));
|
|
|
|
#if 0
|
|
/*
|
|
* These functions in support.s are declared elsewhere.
|
|
*/
|
|
void bcopy __P((const void *from, void *to, size_t len));
|
|
void blkclr __P((void *buf, size_t len));
|
|
void bzero __P((void *buf, size_t len));
|
|
int copyin __P((void *udaddr, void *kaddr, size_t len));
|
|
int copyinstr __P((void *udaddr, void *kaddr, size_t len,
|
|
size_t *lencopied));
|
|
int copyout __P((void *kaddr, void *udaddr, size_t len));
|
|
int copystr __P((void *kfaddr, void *kdaddr, size_t len,
|
|
size_t *lencopied));
|
|
int fubyte __P((void *base));
|
|
int fuswintr __P((void *base));
|
|
int fuibyte __P((void *base));
|
|
int fuword __P((void *base));
|
|
struct region_descriptor;
|
|
void lgdt __P((struct region_descriptor *rdp));
|
|
void lidt __P((struct region_descriptor *rdp));
|
|
void lldt __P((u_short sel));
|
|
/*
|
|
* longjmp() and setjmp() are only used by ddb. They probably shouldn't
|
|
* shouldn't be supported in the kernel.
|
|
*/
|
|
#include <setjmp.h>
|
|
void longjmp __P((jmp_buf jb, int rv));
|
|
void ovbcopy __P((const void *from, void *to, size_t len);
|
|
int setjmp __P((jmp_buf jb));
|
|
struct soft_segment_descriptor;
|
|
union descriptor;
|
|
int ssdtosd __P((struct soft_segment_descriptor *ssdp,
|
|
union descriptor *sdp));
|
|
int subyte __P((void *base, int byte));
|
|
int suibyte __P((void *base, int byte));
|
|
int suswintr __P((void *base, int word));
|
|
int suword __P((void *base, int word));
|
|
|
|
/*
|
|
* These functions in support.s are declared elsewhere, but never used.
|
|
* A silly amount of effort went into copyoutstr(). It's not worth
|
|
* maintaining, since the string length is usually known so copyout
|
|
* works better, or is easy to find so copyout() can be used.
|
|
*/
|
|
int copyoutstr __P((void *kaddr, void *udaddr, size_t len,
|
|
size_t *lencopied));
|
|
int fuiword __P((void *base));
|
|
int suiword __P((void *base, int word));
|
|
|
|
/*
|
|
* These functions in support.s are also in libkern.a and are declared in
|
|
* libkern.h.
|
|
* ffs() is built in to gcc-2 and was buggy in gcc-2.4.5 so we may may the
|
|
* buggy version if we don't replace it by an inline.
|
|
*/
|
|
int bcmp __P((const void *b1, const void *b2, size_t length));
|
|
int ffs __P((int mask));
|
|
#endif /* 0 */
|
|
|
|
/*
|
|
* These variables and functions in support.s are used.
|
|
*/
|
|
extern u_int atdevbase; /* offset in virtual memory of ISA io mem */
|
|
|
|
void filli __P((int pat, void *base, size_t cnt));
|
|
void fillw __P((int /*u_short*/ pat, void *base, size_t cnt));
|
|
int fusword __P((void *base));
|
|
void load_cr0 __P((u_long cr0));
|
|
void load_cr3 __P((u_long cr3));
|
|
void ltr __P((u_short sel));
|
|
u_int rcr0 __P((void));
|
|
u_long rcr3 __P((void));
|
|
int rtcin __P((int val));
|
|
|
|
/*
|
|
* These functions are NOT in support.s and should be declared elsewhere.
|
|
*/
|
|
void Debugger __P((const char *msg));
|
|
u_long kvtop __P((void *addr));
|
|
typedef void alias_for_inthand_t __P((u_int cs, u_int ef, u_int esp,
|
|
u_int ss));
|
|
void setidt __P((int idx, alias_for_inthand_t *func, int typ,
|
|
int dpl));
|
|
|
|
#endif /* !_MACHINE_CPUFUNC_H_ */
|