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x86.h
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x86.h
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#include "types.h"
#ifndef X86_H
#define X86_H
static inline uchar
inb(ushort port)
{
uchar data;
asm volatile("in %1,%0" : "=a"(data) : "d"(port));
return data;
}
static inline void
insl(int port, void *addr, int cnt)
{
asm volatile("cld; rep insl" :
"=D" (addr), "=c" (cnt) :
"d" (port), "0" (addr), "1" (cnt) :
"memory", "cc");
}
static inline void
outb(ushort port, uchar data)
{
asm volatile("out %0, %1": : "a"(data), "d"(port));
}
static inline void
outw(ushort port, ushort data)
{
asm volatile("out %0, %1": : "a"(data), "d"(port));
}
static inline void
outsl(int port, const void *addr, int cnt)
{
asm volatile("cld; rep outsl" :
"=S" (addr), "=c" (cnt) :
"d" (port), "0" (addr), "1" (cnt) :
"cc");
}
static inline void
stosb(void *addr, int data, int cnt)
{
asm volatile("cld; rep stosb" :
"=D" (addr), "=c" (cnt) :
"0" (addr), "1" (cnt), "a" (data) :
"memory", "cc");
}
static inline void
stosl(void *addr, int data, int cnt)
{
asm volatile("cld; rep stosl" :
"=D" (addr), "=c" (cnt) :
"0" (addr), "1" (cnt), "a" (data) :
"memory", "cc");
}
static inline void
lcr3(uint val)
{
asm volatile("movl %0,%%cr3" : : "r" (val));
}
struct segdesc;
static inline void
lgdt(struct segdesc *p, int size)
{
volatile ushort pd[3];
pd[0] = size-1;
pd[1] = (uint)p;
pd[2] = (uint)p >> 16;
asm volatile("lgdt (%0)" : : "r" (pd));
}
static inline void
lidt(struct gatedesc *p, int size)
{
volatile ushort pd[3];
pd[0] = size-1;
pd[1] = (uint)p;
pd[2] = (uint)p >> 16;
asm volatile("lidt (%0)" : : "r" (pd));
}
static inline void
sti(void)
{
asm volatile("sti");
}
static inline void
ltr(ushort sel)
{
asm volatile("ltr %0" : : "r"(sel));
}
static inline uint
rcr2(void)
{
uint val;
asm volatile("movl %%cr2, %0" : "=r"(val));
return val;
}
#endif