4 #include "types.h" // u8
5 #include "ioport.h" // outb
7 #define VBE_DISPI_BANK_ADDRESS 0xA0000
8 #define VBE_DISPI_BANK_SIZE_KB 64
10 #define VBE_DISPI_MAX_XRES 2560
11 #define VBE_DISPI_MAX_YRES 1600
13 #define VBE_DISPI_IOPORT_INDEX 0x01CE
14 #define VBE_DISPI_IOPORT_DATA 0x01CF
16 #define VBE_DISPI_INDEX_ID 0x0
17 #define VBE_DISPI_INDEX_XRES 0x1
18 #define VBE_DISPI_INDEX_YRES 0x2
19 #define VBE_DISPI_INDEX_BPP 0x3
20 #define VBE_DISPI_INDEX_ENABLE 0x4
21 #define VBE_DISPI_INDEX_BANK 0x5
22 #define VBE_DISPI_INDEX_VIRT_WIDTH 0x6
23 #define VBE_DISPI_INDEX_VIRT_HEIGHT 0x7
24 #define VBE_DISPI_INDEX_X_OFFSET 0x8
25 #define VBE_DISPI_INDEX_Y_OFFSET 0x9
26 #define VBE_DISPI_INDEX_VIDEO_MEMORY_64K 0xa
28 #define VBE_DISPI_ID0 0xB0C0
29 #define VBE_DISPI_ID1 0xB0C1
30 #define VBE_DISPI_ID2 0xB0C2
31 #define VBE_DISPI_ID3 0xB0C3
32 #define VBE_DISPI_ID4 0xB0C4
33 #define VBE_DISPI_ID5 0xB0C5
35 #define VBE_DISPI_DISABLED 0x00
36 #define VBE_DISPI_ENABLED 0x01
37 #define VBE_DISPI_GETCAPS 0x02
38 #define VBE_DISPI_8BIT_DAC 0x20
39 #define VBE_DISPI_LFB_ENABLED 0x40
40 #define VBE_DISPI_NOCLEARMEM 0x80
42 #define VBE_DISPI_LFB_PHYSICAL_ADDRESS 0xE0000000
44 static inline u16 dispi_read(u16 reg)
46 outw(reg, VBE_DISPI_IOPORT_INDEX);
47 return inw(VBE_DISPI_IOPORT_DATA);
49 static inline void dispi_write(u16 reg, u16 val)
51 outw(reg, VBE_DISPI_IOPORT_INDEX);
52 outw(val, VBE_DISPI_IOPORT_DATA);
55 int bochsvga_init(void);
56 int bochsvga_enabled(void);
57 u16 bochsvga_total_mem(void);
58 int bochsvga_list_modes(u16 seg, u16 ptr);
60 int bochsvga_mode_info(u16 mode, struct vbe_modeinfo *info);
61 void bochsvga_hires_enable(int enable);
62 int bochsvga_set_mode(int mode, int flags);
63 void bochsvga_clear_scr(void);
64 int bochsvga_hires_enabled(void);
65 u16 bochsvga_curr_mode(void);