x86bios.h revision 197444 
1/*-
2 * Written by paradox <ddkprog@yahoo.com>
3 * Public domain.
4 *
5 * x86 registers were borrowed from x86emu.h x86emu_regs.h
6 * for compatability.
7 *
8 * $FreeBSD: head/sys/compat/x86bios/x86bios.h 197383 2009-09-21 08:17:57Z delphij $
9 */
10
11#ifndef _X86BIOS_H_
12#define _X86BIOS_H_
13
14#include <sys/types.h>
15#include <sys/endian.h>
16#include <sys/systm.h>
17
18#ifdef	__BIG_ENDIAN__
19
20struct x86_register32 {
21	uint32_t e_reg;
22};
23
24struct x86_register16 {
25	uint16_t filler0;
26	uint16_t x_reg;
27};
28
29struct x86_register8 {
30	uint8_t filler0, filler1;
31	uint8_t h_reg, l_reg;
32};
33
34#else /* !__BIG_ENDIAN__ */
35
36struct x86_register32 {
37	uint32_t e_reg;
38};
39
40struct x86_register16 {
41	uint16_t x_reg;
42};
43
44struct x86_register8 {
45	uint8_t l_reg, h_reg;
46};
47
48#endif /* __BIG_ENDIAN__ */
49
50union x86_register {
51	struct x86_register32	I32_reg;
52	struct x86_register16	I16_reg;
53	struct x86_register8	I8_reg;
54};
55
56struct x86regs {
57	uint16_t		register_cs;
58	uint16_t		register_ds;
59	uint16_t		register_es;
60	uint16_t		register_fs;
61	uint16_t		register_gs;
62	uint16_t		register_ss;
63	uint32_t		register_flags;
64	union x86_register	register_a;
65	union x86_register	register_b;
66	union x86_register	register_c;
67	union x86_register	register_d;
68
69	union x86_register	register_sp;
70	union x86_register	register_bp;
71	union x86_register	register_si;
72	union x86_register	register_di;
73	union x86_register	register_ip;
74};
75
76typedef struct x86regs	x86regs_t;
77
78/* 8 bit registers */
79#define R_AH	register_a.I8_reg.h_reg
80#define R_AL	register_a.I8_reg.l_reg
81#define R_BH	register_b.I8_reg.h_reg
82#define R_BL	register_b.I8_reg.l_reg
83#define R_CH	register_c.I8_reg.h_reg
84#define R_CL	register_c.I8_reg.l_reg
85#define R_DH	register_d.I8_reg.h_reg
86#define R_DL	register_d.I8_reg.l_reg
87
88/* 16 bit registers */
89#define R_AX	register_a.I16_reg.x_reg
90#define R_BX	register_b.I16_reg.x_reg
91#define R_CX	register_c.I16_reg.x_reg
92#define R_DX	register_d.I16_reg.x_reg
93
94/* 32 bit extended registers */
95#define R_EAX	register_a.I32_reg.e_reg
96#define R_EBX	register_b.I32_reg.e_reg
97#define R_ECX	register_c.I32_reg.e_reg
98#define R_EDX	register_d.I32_reg.e_reg
99
100/* special registers */
101#define R_SP	register_sp.I16_reg.x_reg
102#define R_BP	register_bp.I16_reg.x_reg
103#define R_SI	register_si.I16_reg.x_reg
104#define R_DI	register_di.I16_reg.x_reg
105#define R_IP	register_ip.I16_reg.x_reg
106#define R_FLG	register_flags
107
108/* special registers */
109#define R_ESP	register_sp.I32_reg.e_reg
110#define R_EBP	register_bp.I32_reg.e_reg
111#define R_ESI	register_si.I32_reg.e_reg
112#define R_EDI	register_di.I32_reg.e_reg
113#define R_EIP	register_ip.I32_reg.e_reg
114#define R_EFLG	register_flags
115
116/* segment registers */
117#define R_CS	register_cs
118#define R_DS	register_ds
119#define R_SS	register_ss
120#define R_ES	register_es
121#define R_FS	register_fs
122#define R_GS	register_gs
123
124#define SEG_ADDR(x)	(((x) >> 4) & 0x00F000)
125#define SEG_OFF(x)	((x) & 0x0FFFF)
126#define FARP(x)		((le32toh(x) & 0xffff) + ((le32toh(x) >> 12) & 0xffff00))
127
128#define MAPPED_MEMORY_SIZE	0xc00000
129#define PAGE_RESERV		(4096*5)
130
131__BEGIN_DECLS
132void  x86biosCall(struct x86regs *regs, int intno);
133void *x86biosAlloc(int count, int *segs);
134void  x86biosFree(void *pbuf, int count);
135void *x86biosOffs(uint32_t offs);
136__END_DECLS
137
138#endif /* !_X86BIOS_H_ */
139