1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
#ifndef ROMBIOS_COMPAT
#define ROMBIOS_COMPAT
/*
* Compatibility functions and structures for transitioning between
* 16 bit Bochs BIOS and 32 bit BIOS code.
*/
#define ADDR_FROM_SEG_OFF(seg, off) (void *)((((uint32_t)(seg)) << 4) + (off))
typedef unsigned char uint8_t;
typedef unsigned short int uint16_t;
typedef unsigned int uint32_t;
typedef uint8_t Bit8u;
typedef uint16_t Bit16u;
typedef uint32_t Bit32u;
#define SetCF(x) (x)->u.r8.flagsl |= 0x01
#define SetZF(x) (x)->u.r8.flagsl |= 0x40
#define ClearCF(x) (x)->u.r8.flagsl &= 0xfe
#define ClearZF(x) (x)->u.r8.flagsl &= 0xbf
#define GetCF(x) ((x)->u.r8.flagsl & 0x01)
#define SET_CF() *FLAGS |= 0x0001
#define CLEAR_CF() *FLAGS &= 0xfffe
#define GET_CF() (*FLAGS & 0x0001)
#define SET_ZF() *FLAGS |= 0x0040
#define CLEAR_ZF() *FLAGS &= 0xffbf
typedef struct {
union {
struct {
Bit32u edi, esi, ebp, esp;
Bit32u ebx, edx, ecx, eax;
} r32;
struct {
Bit16u di, filler1, si, filler2, bp, filler3, sp, filler4;
Bit16u bx, filler5, dx, filler6, cx, filler7, ax, filler8;
} r16;
struct {
Bit32u filler[4];
Bit8u bl, bh;
Bit16u filler1;
Bit8u dl, dh;
Bit16u filler2;
Bit8u cl, ch;
Bit16u filler3;
Bit8u al, ah;
Bit16u filler4;
} r8;
} u;
} __attribute__((packed)) pushad_regs_t;
static inline Bit32u read_dword(Bit16u seg, Bit16u off)
{
uint32_t *addr = (uint32_t *)ADDR_FROM_SEG_OFF(seg,off);
return *addr;
}
static inline Bit16u read_word(Bit16u seg, Bit16u off)
{
uint16_t *addr = (uint16_t *)ADDR_FROM_SEG_OFF(seg,off);
return *addr;
}
static inline Bit8u read_byte(Bit16u seg, Bit16u off)
{
uint8_t *addr = (uint8_t *)ADDR_FROM_SEG_OFF(seg,off);
return *addr;
}
static inline void write_dword(Bit16u seg, Bit16u off, Bit32u val)
{
uint32_t *addr = (uint32_t *)ADDR_FROM_SEG_OFF(seg,off);
*addr = val;
}
static inline void write_word(Bit16u seg, Bit16u off, Bit16u val)
{
uint16_t *addr = (uint16_t *)ADDR_FROM_SEG_OFF(seg,off);
*addr = val;
}
static inline void write_byte(Bit16u seg, Bit16u off, Bit8u val)
{
uint8_t *addr = (uint8_t *)ADDR_FROM_SEG_OFF(seg,off);
*addr = val;
}
#define X(idx, ret, fn, args...) ret fn (args);
#include "32bitprotos.h"
#undef X
#endif
|
