1993-06-12 14:58:17 +00:00
|
|
|
/*
|
|
|
|
* Functions to provide access to special i386 instructions.
|
|
|
|
* XXX - bezillions more are defined in locore.s but are not declared anywhere.
|
1993-10-16 14:40:57 +00:00
|
|
|
*
|
|
|
|
* $Id$
|
1993-06-12 14:58:17 +00:00
|
|
|
*/
|
|
|
|
|
|
|
|
#include <sys/cdefs.h>
|
|
|
|
#include <sys/types.h>
|
|
|
|
|
|
|
|
#ifdef __GNUC__
|
|
|
|
|
|
|
|
static __inline int bdb(void)
|
|
|
|
{
|
|
|
|
extern int bdb_exists;
|
|
|
|
|
|
|
|
if (!bdb_exists)
|
|
|
|
return (0);
|
|
|
|
__asm("int $3");
|
|
|
|
return (1);
|
|
|
|
}
|
|
|
|
|
|
|
|
static __inline void
|
|
|
|
disable_intr(void)
|
|
|
|
{
|
|
|
|
__asm __volatile("cli");
|
|
|
|
}
|
|
|
|
|
|
|
|
static __inline void
|
|
|
|
enable_intr(void)
|
|
|
|
{
|
|
|
|
__asm __volatile("sti");
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* This roundabout method of returning a u_char helps stop gcc-1.40 from
|
|
|
|
* generating unnecessary movzbl's.
|
|
|
|
*/
|
|
|
|
#define inb(port) ((u_char) u_int_inb(port))
|
|
|
|
|
|
|
|
static __inline u_int
|
|
|
|
u_int_inb(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-2.2.2 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 void
|
|
|
|
outb(u_int port, u_char data)
|
|
|
|
{
|
|
|
|
register u_char al asm("ax");
|
|
|
|
|
|
|
|
al = data; /* help gcc-1.40's register allocator */
|
|
|
|
__asm __volatile("outb %0,%%dx" : : "a" (al), "d" (port));
|
|
|
|
}
|
|
|
|
|
1993-07-27 10:52:31 +00:00
|
|
|
static __inline__
|
|
|
|
imin(a, b)
|
|
|
|
int a, b;
|
|
|
|
{
|
|
|
|
|
|
|
|
return (a < b ? a : b);
|
|
|
|
}
|
|
|
|
|
|
|
|
static __inline__
|
|
|
|
imax(a, b)
|
|
|
|
int a, b;
|
|
|
|
{
|
|
|
|
|
|
|
|
return (a > b ? a : b);
|
|
|
|
}
|
|
|
|
|
|
|
|
static __inline__
|
|
|
|
unsigned int
|
|
|
|
min(a, b)
|
|
|
|
unsigned int a, b;
|
|
|
|
{
|
|
|
|
|
|
|
|
return (a < b ? a : b);
|
|
|
|
}
|
|
|
|
|
|
|
|
static __inline__
|
|
|
|
unsigned int
|
|
|
|
max(a, b)
|
|
|
|
unsigned int a, b;
|
|
|
|
{
|
|
|
|
|
|
|
|
return (a > b ? a : b);
|
|
|
|
}
|
|
|
|
|
|
|
|
static __inline__
|
|
|
|
long
|
|
|
|
lmin(a, b)
|
|
|
|
long a, b;
|
|
|
|
{
|
|
|
|
|
|
|
|
return (a < b ? a : b);
|
|
|
|
}
|
|
|
|
|
|
|
|
static __inline__
|
|
|
|
long
|
|
|
|
lmax(a, b)
|
|
|
|
long a, b;
|
|
|
|
{
|
|
|
|
|
|
|
|
return (a > b ? a : b);
|
|
|
|
}
|
|
|
|
|
|
|
|
static __inline__
|
|
|
|
unsigned long
|
|
|
|
ulmin(a, b)
|
|
|
|
unsigned long a, b;
|
|
|
|
{
|
|
|
|
|
|
|
|
return (a < b ? a : b);
|
|
|
|
}
|
|
|
|
|
|
|
|
static __inline__
|
|
|
|
unsigned long
|
|
|
|
ulmax(a, b)
|
|
|
|
unsigned long a, b;
|
|
|
|
{
|
|
|
|
|
|
|
|
return (a > b ? a : b);
|
|
|
|
}
|
|
|
|
|
|
|
|
static __inline__
|
|
|
|
ffs(mask)
|
|
|
|
register long mask;
|
|
|
|
{
|
|
|
|
register int bit;
|
|
|
|
|
|
|
|
if (!mask)
|
|
|
|
return(0);
|
|
|
|
for (bit = 1;; ++bit) {
|
|
|
|
if (mask&0x01)
|
|
|
|
return(bit);
|
|
|
|
mask >>= 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static __inline__
|
|
|
|
bcmp(v1, v2, len)
|
|
|
|
void *v1, *v2;
|
|
|
|
register unsigned len;
|
|
|
|
{
|
|
|
|
register u_char *s1 = v1, *s2 = v2;
|
|
|
|
|
|
|
|
while (len--)
|
|
|
|
if (*s1++ != *s2++)
|
|
|
|
return (1);
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static __inline__
|
|
|
|
size_t
|
|
|
|
strlen(s1)
|
|
|
|
register __const__ char *s1;
|
|
|
|
{
|
|
|
|
register size_t len;
|
|
|
|
|
|
|
|
for (len = 0; *s1++ != '\0'; len++)
|
|
|
|
;
|
|
|
|
return (len);
|
|
|
|
}
|
|
|
|
|
1993-06-12 14:58:17 +00:00
|
|
|
#else /* not __GNUC__ */
|
|
|
|
|
|
|
|
int bdb __P((void));
|
|
|
|
void disable_intr __P((void));
|
|
|
|
void enable_intr __P((void));
|
|
|
|
u_char inb __P((u_int port));
|
|
|
|
void outb __P((u_int port, u_int data)); /* XXX - incompat */
|
|
|
|
|
|
|
|
#endif /* __GNUC__ */
|
|
|
|
|
|
|
|
#define really_u_int int /* XXX */
|
|
|
|
#define really_void int /* XXX */
|
|
|
|
|
|
|
|
void load_cr0 __P((u_int cr0));
|
|
|
|
really_u_int rcr0 __P((void));
|
|
|
|
|
|
|
|
#ifdef notyet
|
|
|
|
really_void setidt __P((int idx, /*XXX*/caddr_t func, int typ, int dpl));
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#undef really_u_int
|
|
|
|
#undef really_void
|
1993-07-27 10:52:31 +00:00
|
|
|
|