minix/common/include/arch/i386/int86.h

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2005-04-21 16:53:53 +02:00
/* int86.h - 8086 interrupt types Author: Kees J. Bot
* 3 May 2000
*/
/* Registers used in an PC real mode call for BIOS or DOS services. A
* driver is called through the vector if the interrupt number is zero.
*/
union reg86 {
struct l {
u32_t ef; /* 32 bit flags (output only) */
u32_t vec; /* Driver vector (input only) */
u32_t _ds_es[1];
u32_t eax; /* 32 bit general registers */
u32_t ebx;
u32_t ecx;
u32_t edx;
u32_t esi;
u32_t edi;
u32_t ebp;
} l;
struct w {
u16_t f, _ef[1]; /* 16 bit flags (output only) */
u16_t off, seg; /* Driver vector (input only) */
u16_t ds, es; /* DS and ES real mode segment regs */
u16_t ax, _eax[1]; /* 16 bit general registers */
u16_t bx, _ebx[1];
u16_t cx, _ecx[1];
u16_t dx, _edx[1];
u16_t si, _esi[1];
u16_t di, _edi[1];
u16_t bp, _ebp[1];
} w;
struct b {
u8_t intno, _intno[3]; /* Interrupt number (input only) */
u8_t _vec[4];
u8_t _ds_es[4];
u8_t al, ah, _eax[2]; /* 8 bit general registers */
u8_t bl, bh, _ebx[2];
u8_t cl, ch, _ecx[2];
u8_t dl, dh, _edx[2];
u8_t _esi[4];
u8_t _edi[4];
u8_t _ebp[4];
} b;
};
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struct reg86u { union reg86 u; }; /* Better for forward declarations */
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/* Parameters passed on ioctls to the memory task. */
struct mio_int86 { /* MIOCINT86 */
union reg86 reg86; /* x86 registers as above */
u16_t off, seg; /* Address of kernel buffer */
void *buf; /* User data buffer */
size_t len; /* Size of user buffer */
};
struct mio_ldt86 { /* MIOCGLDT86, MIOCSLDT86 */
size_t idx; /* Index in process' LDT */
u16_t entry[4]; /* One LDT entry to get or set. */
};