[people/pmueller/ipfire-2.x.git] / src / hwinfo / src / int10 / vm86_struct.h

#ifndef _LINUX_VM86_H
#define _LINUX_VM86_H

/*
 * I'm guessing at the VIF/VIP flag usage, but hope that this is how
 * the Pentium uses them. Linux will return from vm86 mode when both
 * VIF and VIP is set.
 *
 * On a Pentium, we could probably optimize the virtual flags directly
 * in the eflags register instead of doing it "by hand" in vflags...
 *
 * Linus
 */

#define TF_MASK		0x00000100
#define IF_MASK		0x00000200
#define IOPL_MASK	0x00003000
#define NT_MASK		0x00004000
#define VM_MASK		0x00020000
#define AC_MASK		0x00040000
#define VIF_MASK	0x00080000	/* virtual interrupt flag */
#define VIP_MASK	0x00100000	/* virtual interrupt pending */
#define ID_MASK		0x00200000

#define BIOSSEG		0x0f000

#define CPU_086		0
#define CPU_186		1
#define CPU_286		2
#define CPU_386		3
#define CPU_486		4
#define CPU_586		5

/*
 * Return values for the 'vm86()' system call
 */
#define VM86_TYPE(retval)	((retval) & 0xff)
#define VM86_ARG(retval)	((retval) >> 8)

#define VM86_SIGNAL	0	/* return due to signal */
#define VM86_UNKNOWN	1	/* unhandled GP fault - IO-instruction or similar */
#define VM86_INTx	2	/* int3/int x instruction (ARG = x) */
#define VM86_STI	3	/* sti/popf/iret instruction enabled virtual interrupts */

/*
 * Additional return values when invoking new vm86()
 */
#define VM86_PICRETURN	4	/* return due to pending PIC request */
#define VM86_TRAP	6	/* return due to DOS-debugger request */

/*
 * function codes when invoking new vm86()
 */
#define VM86_PLUS_INSTALL_CHECK	0
#define VM86_ENTER		1
#define VM86_ENTER_NO_BYPASS	2
#define	VM86_REQUEST_IRQ	3
#define VM86_FREE_IRQ		4
#define VM86_GET_IRQ_BITS	5
#define VM86_GET_AND_RESET_IRQ	6

/*
 * This is the stack-layout seen by the user space program when we have
 * done a translation of "SAVE_ALL" from vm86 mode. The real kernel layout
 * is 'kernel_vm86_regs' (see below).
 */

struct vm86_regs {
/*
 * normal regs, with special meaning for the segment descriptors..
 */
	long ebx;
	long ecx;
	long edx;
	long esi;
	long edi;
	long ebp;
	long eax;
	long __null_ds;
	long __null_es;
	long __null_fs;
	long __null_gs;
	long orig_eax;
	long eip;
	unsigned short cs, __csh;
	long eflags;
	long esp;
	unsigned short ss, __ssh;
/*
 * these are specific to v86 mode:
 */
	unsigned short es, __esh;
	unsigned short ds, __dsh;
	unsigned short fs, __fsh;
	unsigned short gs, __gsh;
};

struct revectored_struct {
	unsigned long __map[8];			/* 256 bits */
};

struct vm86_struct {
	struct vm86_regs regs;
	unsigned long flags;
	unsigned long screen_bitmap;
	unsigned long cpu_type;
	struct revectored_struct int_revectored;
	struct revectored_struct int21_revectored;
};

/*
 * flags masks
 */
#define VM86_SCREEN_BITMAP	0x0001

struct vm86plus_info_struct {
	unsigned long force_return_for_pic:1;
	unsigned long vm86dbg_active:1;       /* for debugger */
	unsigned long vm86dbg_TFpendig:1;     /* for debugger */
	unsigned long unused:28;
	unsigned long is_vm86pus:1;	      /* for vm86 internal use */
	unsigned char vm86dbg_intxxtab[32];   /* for debugger */
};

struct vm86plus_struct {
	struct vm86_regs regs;
	unsigned long flags;
	unsigned long screen_bitmap;
	unsigned long cpu_type;
	struct revectored_struct int_revectored;
	struct revectored_struct int21_revectored;
	struct vm86plus_info_struct vm86plus;
};

#endif
Commit	Line	Data
a6316ce4 MT	1	#ifndef _LINUX_VM86_H
	2	#define _LINUX_VM86_H
	3
	4	/*
	5	* I'm guessing at the VIF/VIP flag usage, but hope that this is how
	6	* the Pentium uses them. Linux will return from vm86 mode when both
	7	* VIF and VIP is set.
	8	*
	9	* On a Pentium, we could probably optimize the virtual flags directly
	10	* in the eflags register instead of doing it "by hand" in vflags...
	11	*
	12	* Linus
	13	*/
	14
	15	#define TF_MASK 0x00000100
	16	#define IF_MASK 0x00000200
	17	#define IOPL_MASK 0x00003000
	18	#define NT_MASK 0x00004000
	19	#define VM_MASK 0x00020000
	20	#define AC_MASK 0x00040000
	21	#define VIF_MASK 0x00080000 /* virtual interrupt flag */
	22	#define VIP_MASK 0x00100000 /* virtual interrupt pending */
	23	#define ID_MASK 0x00200000
	24
	25	#define BIOSSEG 0x0f000
	26
	27	#define CPU_086 0
	28	#define CPU_186 1
	29	#define CPU_286 2
	30	#define CPU_386 3
	31	#define CPU_486 4
	32	#define CPU_586 5
	33
	34	/*
	35	* Return values for the 'vm86()' system call
	36	*/
	37	#define VM86_TYPE(retval) ((retval) & 0xff)
	38	#define VM86_ARG(retval) ((retval) >> 8)
	39
	40	#define VM86_SIGNAL 0 /* return due to signal */
	41	#define VM86_UNKNOWN 1 /* unhandled GP fault - IO-instruction or similar */
	42	#define VM86_INTx 2 /* int3/int x instruction (ARG = x) */
	43	#define VM86_STI 3 /* sti/popf/iret instruction enabled virtual interrupts */
	44
	45	/*
	46	* Additional return values when invoking new vm86()
	47	*/
	48	#define VM86_PICRETURN 4 /* return due to pending PIC request */
	49	#define VM86_TRAP 6 /* return due to DOS-debugger request */
	50
	51	/*
	52	* function codes when invoking new vm86()
	53	*/
	54	#define VM86_PLUS_INSTALL_CHECK 0
	55	#define VM86_ENTER 1
	56	#define VM86_ENTER_NO_BYPASS 2
	57	#define VM86_REQUEST_IRQ 3
	58	#define VM86_FREE_IRQ 4
	59	#define VM86_GET_IRQ_BITS 5
	60	#define VM86_GET_AND_RESET_IRQ 6
	61
	62	/*
	63	* This is the stack-layout seen by the user space program when we have
	64	* done a translation of "SAVE_ALL" from vm86 mode. The real kernel layout
65	* is 'kernel_vm86_regs' (see below).
66	*/
67
68	struct vm86_regs {
69	/*
70	* normal regs, with special meaning for the segment descriptors..
71	*/
72	long ebx;
73	long ecx;
74	long edx;
75	long esi;
76	long edi;
77	long ebp;
78	long eax;
79	long __null_ds;
80	long __null_es;
81	long __null_fs;
82	long __null_gs;
83	long orig_eax;
84	long eip;
85	unsigned short cs, __csh;
86	long eflags;
87	long esp;
88	unsigned short ss, __ssh;
89	/*
90	* these are specific to v86 mode:
91	*/
92	unsigned short es, __esh;
93	unsigned short ds, __dsh;
94	unsigned short fs, __fsh;
95	unsigned short gs, __gsh;
96	};
97
98	struct revectored_struct {
99	unsigned long __map[8]; /* 256 bits */
100	};
101
102	struct vm86_struct {
103	struct vm86_regs regs;
104	unsigned long flags;
105	unsigned long screen_bitmap;
106	unsigned long cpu_type;
107	struct revectored_struct int_revectored;
108	struct revectored_struct int21_revectored;
109	};
110
111	/*
112	* flags masks
113	*/
114	#define VM86_SCREEN_BITMAP 0x0001
115
116	struct vm86plus_info_struct {
117	unsigned long force_return_for_pic:1;
118	unsigned long vm86dbg_active:1; /* for debugger */
119	unsigned long vm86dbg_TFpendig:1; /* for debugger */
120	unsigned long unused:28;
121	unsigned long is_vm86pus:1; /* for vm86 internal use */
122	unsigned char vm86dbg_intxxtab[32]; /* for debugger */
123	};
124
125	struct vm86plus_struct {
126	struct vm86_regs regs;
127	unsigned long flags;
128	unsigned long screen_bitmap;
129	unsigned long cpu_type;
130	struct revectored_struct int_revectored;
131	struct revectored_struct int21_revectored;
132	struct vm86plus_info_struct vm86plus;
133	};
134
135	#endif